Exponential Technology Report 2026: Fusion and Frontier Energy

S.1Abstract

S.2Key messages

Six readings that frame the fusion baseline, and the eight questions this edition answers, each with its status and source.

1. Yes at one facility, counting laser energy on target only: 8.6 MJ from 2.08 MJ in 2025.⁵⁶

   Has fusion produced more energy than the laser put in?Reported

2. WEST held a plasma for 1,337 seconds in 2025; EAST held 1,066 seconds in high confinement.¹²

   What is the longest plasma?Reported

3. The plan is 2039, with research operation from 2034.⁷

   When will ITER burn deuterium and tritium?Reported

4. No source read reports it. Companies state plans for 2028 and the early 2030s.²⁴²³

   Does any fusion plant deliver electricity?Reported

5. Tritium free for fusion in 2055 ranges from 0 to 27.7 kg; lithium-6 supply is effectively zero today.²⁰²¹

   Is there enough fuel?Reported

6. USD 4.48 billion of private funding in the 12 months to July 2026, in a survey.¹⁰

   What does the money look like?Reported

7. A US rule is proposed to license fusion machines as byproduct material users.¹⁴

   What does regulation look like?Reported

8. First-plant fuel: start-up tritium and blanket demonstration. SCN-XT14-FUE-01

   What will 2027 test first?Expert input

S.3Headline finding

ReportedEQL 4NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-INF-001

On 7 April 2025 the National Ignition Facility produced 8.6 MJ of fusion energy from 2.08 MJ of laser energy delivered to the target, a target gain of 4.13.

Fusion energy out exceeded laser energy on target by a factor of 4.13. The laboratory lowered the maximum shot energy from 2.2 MJ to 1.9 MJ during refurbishment and plans an upgrade to 2.6 MJ, at which yields above 30 MJ become possible⁵. The first ignition shot, on 5 December 2022, produced 3.15 MJ from 2.05 MJ⁶.

S.4At a glance

S.5What each steward reads in it

S.6What this edition is, and is not

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
2. 4World Nuclear News (ed.), New world record set in JET final fusion experiments (news report of 9 February 2024; 69 MJ over 5 seconds from 0.2 milligrams of fuel; 59 MJ in 2021). World Nuclear Association, London. Observation year 2024. Accessed 2026-11-03.back
3. 1CEA IRFM (ed.), WEST sets a new plasma duration record (news page; plasma 61299, 12 February 2025, 1,337 seconds, 2 MW lower hybrid heating, 2.6 GJ injected and extracted). Commissariat a l energie atomique et aux energies alternatives, Cadarache. Observation year 2025. Accessed 2026-11-03.back
4. 2Physics World (ed.), China experimental advanced superconducting tokamak smashes fusion confinement record (news report; EAST 1066 seconds in high confinement, January 2025; earlier 403 seconds in 2023). IOP Publishing, Bristol. Observation year 2025. Accessed 2026-11-03.back
5. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03.back
6. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03.back
7. 21Pearson, R.J., The availability and supply of critical natural resources for the realisation of a fusion pilot plant: fuels for fusion (presentation to the US Department of Energy fusion workshop, 1 to 3 June 2022; lithium-6 is 7.4% of natural lithium; blankets need 30 to 90%; supply effectively zero; a company presentation, weak evidence). Kyoto Fusioneering, London. Observation year 2022. Accessed 2026-11-03.back
8. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back
9. 15UK Department for Energy Security and Net Zero (ed.), A new energy revolution: the UK plan for delivering fusion energy (policy paper of 16 March 2026; over GBP 2.5 billion over five years; GBP 1.3 billion for STEP and UK Fusion Energy; the first 100,000 of 127,790 characters were read). UK Government, London. Observation year 2026. Accessed 2026-11-03.back
10. 16Clean Energy Wire (ed.), German government pledges more than EUR 2 bln for nuclear fusion (news report of 2 October 2025; cabinet plan of 1 October 2025). Clean Energy Wire, Berlin. Observation year 2025. Accessed 2026-11-03.back
11. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back
12. 6Lawrence Livermore National Laboratory (ed.), NIF fusion ignition shot hailed as historic scientific feat (news page; shot of 5 December 2022, 3.15 MJ from 2.05 MJ; announced 13 December 2022). Lawrence Livermore National Laboratory, Livermore. Observation year 2022. Accessed 2026-11-03.back
13. 24Helion (ed.), Orion, the first fusion power plant (company page; Malaga, Washington; construction from 2025; initial operations stated for 2028; Microsoft agreement for 50 MW; a vendor announcement, weak evidence). Helion Energy, Everett. Observation year 2026. Accessed 2026-11-03.back
14. 23Commonwealth Fusion Systems and Eni (eds.), Eni and CFS sign over USD 1 billion power purchase agreement (joint company release of 22 September 2025; 400 MW ARC plant in Chesterfield County, Virginia; grid connection in the early 2030s; a vendor announcement, weak evidence). Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03.back
15. 9World Nuclear News (ed.), Fusion entering implementation phase, says Grossi (report on the IAEA World Fusion Outlook 2025; more than 160 devices; private investment above USD 10 billion; October 2025). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back

1.1The questions this part answers

Key questions

• Where is fusion risk concentrated?
• Which couplings carry fusion shocks into other systems?
• Which fusion capabilities hold under compound stress?
• What must 2027 evidence measure first?

In this part

• Narrative
• Headline finding
• Lead figure
• Five footprint and governance chapters
• Twelve-domain reading
• Sector screens
• Dependency matrix
• Risk objects
• Capability ladder
• Scenario
• Three lenses
• Portfolio

1.2The argument

1.3Twenty couplings between five systems

The fusion-centred matrix types the twenty couplings between the five core systems, read for their fusion content. Strengths are Nexus estimates (ESTIMATED) from the cited evidence and analogue events; they set the graph that 2027 evidence will test.

Transmission paths

1. 01

   MIN → INF

   A tritium or lithium-6 shortfall delays first plants.

   Inferred tritium and lithium analyses²⁰²¹

2. 02

   FIN → INF

   Private and public funding pay for devices and test facilities.

   Reported USD 4.48 billion, 2026¹⁰

3. 03

   GOV → INF

   Licensing rules set the route and timing for first plants.

   Reported US proposed rule¹⁴

4. 04

   INF → ENE

   A successful plant would add firm power; none is documented.

   Inferred company statements²⁴²³

5. 05

   ENE → INF

   Facility electricity limits what a shot or pulse means.

   Inferred NIF and WEST reports⁵¹

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
2. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03.back
3. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back
4. 4World Nuclear News (ed.), New world record set in JET final fusion experiments (news report of 9 February 2024; 69 MJ over 5 seconds from 0.2 milligrams of fuel; 59 MJ in 2021). World Nuclear Association, London. Observation year 2024. Accessed 2026-11-03.back
5. 1CEA IRFM (ed.), WEST sets a new plasma duration record (news page; plasma 61299, 12 February 2025, 1,337 seconds, 2 MW lower hybrid heating, 2.6 GJ injected and extracted). Commissariat a l energie atomique et aux energies alternatives, Cadarache. Observation year 2025. Accessed 2026-11-03.back
6. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03.back
7. 24Helion (ed.), Orion, the first fusion power plant (company page; Malaga, Washington; construction from 2025; initial operations stated for 2028; Microsoft agreement for 50 MW; a vendor announcement, weak evidence). Helion Energy, Everett. Observation year 2026. Accessed 2026-11-03.back
8. 23Commonwealth Fusion Systems and Eni (eds.), Eni and CFS sign over USD 1 billion power purchase agreement (joint company release of 22 September 2025; 400 MW ARC plant in Chesterfield County, Virginia; grid connection in the early 2030s; a vendor announcement, weak evidence). Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03.back
9. 12US Department of Energy (ed.), Energy Department announces Fusion Science and Technology Roadmap to accelerate commercial fusion power (announcement of 16 October 2025; Build-Innovate-Grow; power on the grid by the mid-2030s; no funding commitment). US Department of Energy, Washington. Observation year 2025. Accessed 2026-11-03.back
10. 25Physics Today (ed.), ITER costs are pinned down with caveats (news report on the 2016 baseline review; review committee chaired by A. Wagner; estimate without contingencies). American Institute of Physics, College Park. Observation year 2016. Accessed 2026-11-03.back
11. 21Pearson, R.J., The availability and supply of critical natural resources for the realisation of a fusion pilot plant: fuels for fusion (presentation to the US Department of Energy fusion workshop, 1 to 3 June 2022; lithium-6 is 7.4% of natural lithium; blankets need 30 to 90%; supply effectively zero; a company presentation, weak evidence). Kyoto Fusioneering, London. Observation year 2022. Accessed 2026-11-03.back
12. 2Physics World (ed.), China experimental advanced superconducting tokamak smashes fusion confinement record (news report; EAST 1066 seconds in high confinement, January 2025; earlier 403 seconds in 2023). IOP Publishing, Bristol. Observation year 2025. Accessed 2026-11-03.back
13. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back

2.1Headline finding

ReportedEQL 4NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-INF-001

On 7 April 2025 the National Ignition Facility produced 8.6 MJ of fusion energy from 2.08 MJ of laser energy delivered to the target, a target gain of 4.13.

Implication

Fusion energy out exceeded laser energy on target by a factor of 4.13. The laboratory lowered the maximum shot energy from 2.2 MJ to 1.9 MJ during refurbishment and plans an upgrade to 2.6 MJ, at which yields above 30 MJ become possible⁵. The first ignition shot, on 5 December 2022, produced 3.15 MJ from 2.05 MJ⁶.

What would move it

Refurbishment, the yield upgrade, repeat shots and a facility electricity figure would each move this finding.

2.2Infrastructure

1. ReportedEQL 4NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-INF-001

   On 7 April 2025 the National Ignition Facility produced 8.6 MJ of fusion energy from 2.08 MJ of laser energy delivered to the target, a target gain of 4.13; the first ignition shot of December 2022 produced 3.15 MJ from 2.05 MJ.⁵⁶

2. ReportedEQL 4NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-INF-002

   In its final deuterium-tritium campaign the JET tokamak produced 69 MJ over about 5 seconds from 0.2 milligrams of fuel, up from 59 MJ in 2021; the result was announced on 9 February 2024.⁴

3. ReportedEQL 4NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-INF-003

   WEST held a hydrogen plasma for 1,337 seconds on 12 February 2025 with 2 MW of heating, and EAST held a high-confinement plasma for 1,066 seconds in January 2025.¹²

4. ReportedEQL 3NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-INF-004

   Wendelstein 7-X set a record for the triple product in long plasma pulses, held for 43 seconds, in a campaign that ended on 22 May 2025; tokamaks remain the record holders for short pulses.³

5. ReportedEQL 4NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-INF-005

   ITER plans deuterium-tritium operation in 2039, four years later than the 2016 reference plan, with research operation from 2034 and a target of 500 MW of fusion power from 50 MW of heating.⁷²⁵

2.3Minerals

1. ReportedEQL 3NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-MIN-006

   Heavy-water reactors are the only commercial source of tritium; one analysis finds the amount free for fusion in 2055 ranges from 0 to 27.7 kg across scenarios, and policy commentary puts civilian stocks near 25 kg in 2024.²⁰²²

2. ReportedEQL 2NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-MIN-007

   Breeding blankets need lithium enriched to 30 to 90% lithium-6, natural lithium holds 7.4%, and one company presentation states that current supply of lithium-6 is effectively zero.²¹³³

2.4Finance

1. ReportedEQL 2NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-FIN-008

   Private fusion funding was USD 4.48 billion in the 12 months to July 2026 and USD 14.24 billion cumulative over six years, in a survey of 56 companies; the 2025 survey reported USD 2.64 billion and USD 9.766 billion across 53 companies.¹⁰¹¹

2. ReportedEQL 4NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-FIN-009

   Public programmes expanded: the UK strategy of March 2026 states over GBP 2.5 billion over five years, Germany states over EUR 2 billion by 2029, and China Fusion Energy Co. was set up with 15 billion yuan of registered capital.^15161719

3. ReportedEQL 2NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-FIN-011

   Two companies state plans for first plants: Helion states initial operations in 2028 at a site in Washington State, and Commonwealth Fusion Systems and Eni state a 400 MW plant in Virginia connecting in the early 2030s. These are company statements, not results.²³²⁴²⁸

2.5Governance

1. ReportedEQL 4NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-GOV-010

   The US Nuclear Regulatory Commission proposed on 26 February 2026 to license fusion machines under the byproduct material framework of 10 CFR part 30, with comments due on 27 May 2026; the Department of Energy roadmap of 16 October 2025 targets power on the grid by the mid-2030s.¹⁴¹²

2.6Systemic

1. Expert inputEQL 2NRF-XTECH-FUSION-GLOBAL-2026-BASELINE-SYS-012

   The leading compound pathway for 2027 testing is first-plant fuel: start-up tritium and blanket demonstration set the pace while plant dates are stated in the 2030s. § scenario

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
2. 6Lawrence Livermore National Laboratory (ed.), NIF fusion ignition shot hailed as historic scientific feat (news page; shot of 5 December 2022, 3.15 MJ from 2.05 MJ; announced 13 December 2022). Lawrence Livermore National Laboratory, Livermore. Observation year 2022. Accessed 2026-11-03.back
3. 4World Nuclear News (ed.), New world record set in JET final fusion experiments (news report of 9 February 2024; 69 MJ over 5 seconds from 0.2 milligrams of fuel; 59 MJ in 2021). World Nuclear Association, London. Observation year 2024. Accessed 2026-11-03.back
4. 1CEA IRFM (ed.), WEST sets a new plasma duration record (news page; plasma 61299, 12 February 2025, 1,337 seconds, 2 MW lower hybrid heating, 2.6 GJ injected and extracted). Commissariat a l energie atomique et aux energies alternatives, Cadarache. Observation year 2025. Accessed 2026-11-03.back
5. 2Physics World (ed.), China experimental advanced superconducting tokamak smashes fusion confinement record (news report; EAST 1066 seconds in high confinement, January 2025; earlier 403 seconds in 2023). IOP Publishing, Bristol. Observation year 2025. Accessed 2026-11-03.back
6. 3World Nuclear News (ed.), Wendelstein 7-X sets new fusion performance records (news report of 4 June 2025; long-pulse triple product held for 43 seconds; announcement by the research institute and EUROfusion; peer-reviewed article not yet published at announcement). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
7. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03.back
8. 25Physics Today (ed.), ITER costs are pinned down with caveats (news report on the 2016 baseline review; review committee chaired by A. Wagner; estimate without contingencies). American Institute of Physics, College Park. Observation year 2016. Accessed 2026-11-03.back
9. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03.back
10. 22Theiding, T., Tritium: a few kilograms can make or break nuclear fusion (policy blog post of 6 March 2025; about 25 kg of civilian tritium in 2024; a student fellow commentary, weak evidence). Kleinman Center for Energy Policy, University of Pennsylvania, Philadelphia. Observation year 2024. Accessed 2026-11-03.back
11. 21Pearson, R.J., The availability and supply of critical natural resources for the realisation of a fusion pilot plant: fuels for fusion (presentation to the US Department of Energy fusion workshop, 1 to 3 June 2022; lithium-6 is 7.4% of natural lithium; blankets need 30 to 90%; supply effectively zero; a company presentation, weak evidence). Kyoto Fusioneering, London. Observation year 2022. Accessed 2026-11-03.back
12. 33UNVERIFIED, not opened: Ward, P. and colleagues, Lithium enrichment threatens to curb fusion deployment, arXiv:2605.04707, 2026, taken from search-result summaries. arXiv, Ithaca. Observation year 2026. Accessed 2026-11-03.back
13. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back
14. 11World Nuclear News (ed.), Access to funding remains a major issue for fusion, says FIA (report on the Fusion Industry Association 2025 survey of 23 July 2025: USD 2.64 billion, USD 9.766 billion cumulative, 53 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
15. 15UK Department for Energy Security and Net Zero (ed.), A new energy revolution: the UK plan for delivering fusion energy (policy paper of 16 March 2026; over GBP 2.5 billion over five years; GBP 1.3 billion for STEP and UK Fusion Energy; the first 100,000 of 127,790 characters were read). UK Government, London. Observation year 2026. Accessed 2026-11-03.back
16. 16Clean Energy Wire (ed.), German government pledges more than EUR 2 bln for nuclear fusion (news report of 2 October 2025; cabinet plan of 1 October 2025). Clean Energy Wire, Berlin. Observation year 2025. Accessed 2026-11-03.back
17. 17World Nuclear News (ed.), Germany boosts funding for fusion research (news report; Fusion Action Plan of October 2025; more than EUR 2 billion by 2029; about EUR 1.7 billion public research funding and up to EUR 755 million from an infrastructure fund). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
18. 19American Nuclear Society (ed.), China launches fusion-focused company (news report of 30 July 2025; China Fusion Energy Co., 15 billion yuan registered capital, subsidiary of a state nuclear group; BEST tokamak in Hefei hoped for 2027). American Nuclear Society, La Grange Park. Observation year 2025. Accessed 2026-11-03.back
19. 23Commonwealth Fusion Systems and Eni (eds.), Eni and CFS sign over USD 1 billion power purchase agreement (joint company release of 22 September 2025; 400 MW ARC plant in Chesterfield County, Virginia; grid connection in the early 2030s; a vendor announcement, weak evidence). Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03.back
20. 24Helion (ed.), Orion, the first fusion power plant (company page; Malaga, Washington; construction from 2025; initial operations stated for 2028; Microsoft agreement for 50 MW; a vendor announcement, weak evidence). Helion Energy, Everett. Observation year 2026. Accessed 2026-11-03.back
21. 28UNVERIFIED, not opened: Helion (ed.), Helion secures land and begins building on the site of the first fusion power plant, release of 30 July 2025 (the release page returned a block) and the 2023 Microsoft agreement, taken from search-result summaries. Helion Energy, Everett. Observation year 2025. Accessed 2026-11-03.back
22. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back
23. 12US Department of Energy (ed.), Energy Department announces Fusion Science and Technology Roadmap to accelerate commercial fusion power (announcement of 16 October 2025; Build-Innovate-Grow; power on the grid by the mid-2030s; no funding commitment). US Department of Energy, Washington. Observation year 2025. Accessed 2026-11-03.back

3.1Where each system stood at evidence close

3.2Domain posture

Each of the twelve coupled domains is read through fusion, in words, not scored. The coupling column names the dependency that carries fusion risk into each domain.

3.3Sector screens

All sixteen sectors are screened for their dependence on fusion, on the same grammar as every national edition. The evidence column describes coverage of the baseline evidence, not the performance of the sector.

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
2. 1CEA IRFM (ed.), WEST sets a new plasma duration record (news page; plasma 61299, 12 February 2025, 1,337 seconds, 2 MW lower hybrid heating, 2.6 GJ injected and extracted). Commissariat a l energie atomique et aux energies alternatives, Cadarache. Observation year 2025. Accessed 2026-11-03.back
3. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back
4. 22Theiding, T., Tritium: a few kilograms can make or break nuclear fusion (policy blog post of 6 March 2025; about 25 kg of civilian tritium in 2024; a student fellow commentary, weak evidence). Kleinman Center for Energy Policy, University of Pennsylvania, Philadelphia. Observation year 2024. Accessed 2026-11-03.back
5. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03.back
6. 15UK Department for Energy Security and Net Zero (ed.), A new energy revolution: the UK plan for delivering fusion energy (policy paper of 16 March 2026; over GBP 2.5 billion over five years; GBP 1.3 billion for STEP and UK Fusion Energy; the first 100,000 of 127,790 characters were read). UK Government, London. Observation year 2026. Accessed 2026-11-03.back
7. 24Helion (ed.), Orion, the first fusion power plant (company page; Malaga, Washington; construction from 2025; initial operations stated for 2028; Microsoft agreement for 50 MW; a vendor announcement, weak evidence). Helion Energy, Everett. Observation year 2026. Accessed 2026-11-03.back
8. 23Commonwealth Fusion Systems and Eni (eds.), Eni and CFS sign over USD 1 billion power purchase agreement (joint company release of 22 September 2025; 400 MW ARC plant in Chesterfield County, Virginia; grid connection in the early 2030s; a vendor announcement, weak evidence). Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03.back
9. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back
10. 16Clean Energy Wire (ed.), German government pledges more than EUR 2 bln for nuclear fusion (news report of 2 October 2025; cabinet plan of 1 October 2025). Clean Energy Wire, Berlin. Observation year 2025. Accessed 2026-11-03.back
11. 4World Nuclear News (ed.), New world record set in JET final fusion experiments (news report of 9 February 2024; 69 MJ over 5 seconds from 0.2 milligrams of fuel; 59 MJ in 2021). World Nuclear Association, London. Observation year 2024. Accessed 2026-11-03.back

4.1Risk objects

Each risk is read across the chain from hazard to consequence, with its status and evidence-quality level.

1. InferredEQL 3RSK-XT14-FUE-001

   Tritium start-up supply

   Driver

   one commercial source and scenario-dependent supply²⁰²²

   Exposure

   first plants and research devices using deuterium-tritium fuel

   Vulnerability

   decay of stored tritium; no large reserves; transfer rules

   Capacity

   breeding blanket development; purchase agreements²¹

   Cascade

   MIN → INF

   Horizon

   5 to 10 years

2. InferredEQL 2RSK-XT14-LIT-002

   Lithium-6 enrichment and blanket demonstration

   Driver

   blankets need 30 to 90% lithium-6 and supply is effectively zero²¹³³

   Exposure

   breeding blanket designs

   Vulnerability

   enrichment routes are costly or hazardous in the sources read

   Capacity

   natural-lithium blanket concepts; new enrichment research²¹

   Cascade

   MIN → INF

   Horizon

   5 to 10 years

3. InferredEQL 3RSK-XT14-SCH-003

   Schedule slippage in large public projects

   Driver

   ITER baselines have moved more than once⁷²⁵

   Exposure

   research plans and fuel demand schedules

   Vulnerability

   in-kind supply and fixed dates

   Capacity

   new baseline and staged operation⁷

   Cascade

   INF → FIN

   Horizon

   1 to 10 years

4. InferredEQL 3RSK-XT14-GOV-004

   Licensing and waste rules not final

   Driver

   proposed US rule; UK and EU instruments planned¹⁴¹⁵¹⁸

   Exposure

   first-plant siting and financing

   Vulnerability

   divergent national rules; waste classification not settled

   Capacity

   proposed technology-inclusive framework¹⁴

   Cascade

   GOV → INF, FIN

   Horizon

   1 to 5 years

4.2Capability ladder

Existence is not readiness. Each of the fifteen capability functions is placed on the ladder by the strongest public evidence for fusion at the global level.

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03.back
2. 22Theiding, T., Tritium: a few kilograms can make or break nuclear fusion (policy blog post of 6 March 2025; about 25 kg of civilian tritium in 2024; a student fellow commentary, weak evidence). Kleinman Center for Energy Policy, University of Pennsylvania, Philadelphia. Observation year 2024. Accessed 2026-11-03.back
3. 21Pearson, R.J., The availability and supply of critical natural resources for the realisation of a fusion pilot plant: fuels for fusion (presentation to the US Department of Energy fusion workshop, 1 to 3 June 2022; lithium-6 is 7.4% of natural lithium; blankets need 30 to 90%; supply effectively zero; a company presentation, weak evidence). Kyoto Fusioneering, London. Observation year 2022. Accessed 2026-11-03.back
4. 33UNVERIFIED, not opened: Ward, P. and colleagues, Lithium enrichment threatens to curb fusion deployment, arXiv:2605.04707, 2026, taken from search-result summaries. arXiv, Ithaca. Observation year 2026. Accessed 2026-11-03.back
5. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03.back
6. 25Physics Today (ed.), ITER costs are pinned down with caveats (news report on the 2016 baseline review; review committee chaired by A. Wagner; estimate without contingencies). American Institute of Physics, College Park. Observation year 2016. Accessed 2026-11-03.back
7. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back
8. 15UK Department for Energy Security and Net Zero (ed.), A new energy revolution: the UK plan for delivering fusion energy (policy paper of 16 March 2026; over GBP 2.5 billion over five years; GBP 1.3 billion for STEP and UK Fusion Energy; the first 100,000 of 127,790 characters were read). UK Government, London. Observation year 2026. Accessed 2026-11-03.back
9. 18European Commission (ed.), Commission launches call for evidence to support first-ever EU-wide fusion strategy (news item of 6 June 2025; call open to 1 July 2025; strategy then programmed for the end of 2025). Directorate-General for Energy, Brussels. Observation year 2025. Accessed 2026-11-03.back
10. 12US Department of Energy (ed.), Energy Department announces Fusion Science and Technology Roadmap to accelerate commercial fusion power (announcement of 16 October 2025; Build-Innovate-Grow; power on the grid by the mid-2030s; no funding commitment). US Department of Energy, Washington. Observation year 2025. Accessed 2026-11-03.back
11. 16Clean Energy Wire (ed.), German government pledges more than EUR 2 bln for nuclear fusion (news report of 2 October 2025; cabinet plan of 1 October 2025). Clean Energy Wire, Berlin. Observation year 2025. Accessed 2026-11-03.back
12. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back
13. 9World Nuclear News (ed.), Fusion entering implementation phase, says Grossi (report on the IAEA World Fusion Outlook 2025; more than 160 devices; private investment above USD 10 billion; October 2025). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
14. 1CEA IRFM (ed.), WEST sets a new plasma duration record (news page; plasma 61299, 12 February 2025, 1,337 seconds, 2 MW lower hybrid heating, 2.6 GJ injected and extracted). Commissariat a l energie atomique et aux energies alternatives, Cadarache. Observation year 2025. Accessed 2026-11-03.back
15. 4World Nuclear News (ed.), New world record set in JET final fusion experiments (news report of 9 February 2024; 69 MJ over 5 seconds from 0.2 milligrams of fuel; 59 MJ in 2021). World Nuclear Association, London. Observation year 2024. Accessed 2026-11-03.back
16. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
17. 35UNVERIFIED, not opened: Zylstra, A.B. et al., Burning plasma achieved in inertial fusion, Nature 601, 542 to 548, 2022, cited from memory. Observation year 2022. Accessed 2026-11-03.back
18. 36UNVERIFIED, not opened: Abu-Shawareb, H. et al., Achievement of target gain larger than unity in an inertial fusion experiment, Physical Review Letters 132, 065102, 2024, cited from memory. Observation year 2024. Accessed 2026-11-03.back
19. 46UNVERIFIED, not opened: Maslov, M. et al., JET D-T scientific programme, Nuclear Fusion 63, 112002, 2023, cited from memory. Observation year 2023. Accessed 2026-11-03.back

5.1Assumptions

Scenario SCN-XT14-FUE-01: what is assumed, and what is held constant.

Baseline

the 2026 reference state in this edition

Drivers

first plants are announced for the 2030s while start-up tritium, lithium-6 and licensing remain open

Analogues

the slips in ITER baselines; the tritium supply range in 2055⁷²⁰²⁵

Interventions

none modelled: the specification describes the unmitigated case

Run state

narrative specification; quantified run scheduled for 2027

5.2The cascade, step by step

1. 1

   MIN → INF

   start-up tritium for a first plant proves hard to contract

   2018

2. 2

   MIN → INF

   blanket designs wait for enriched lithium

   2022

3. 3

   GOV → FIN

   licence rules reach final form later than financing plans assume

   2026

4. 4

   INF → FIN

   test results arrive but plant dates move to the later 2030s

   2026

5. 5

   FIN → INF

   funding concentrates in a few devices and test facilities

   2026

6. 6

   GOV → INF

   national plans diverge on siting and waste

   2026

5.3The scenario as a table of steps

How the shock in scenario SCN-XT14-FUE-01 would travel through Fusion and Frontier Energy’s coupled systems, step by step, under the assumptions the edition states.

A teaching model of a conditional scenario under the edition’s stated assumptions: not a forecast, not a prediction and not a warning. Sources: Fusion and Frontier Energy 2026, scenario SCN-XT14-FUE-01 (2026); Fusion and Frontier Energy 2026, references (NR-CIT-1) (2026).

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03.back
2. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03.back
3. 25Physics Today (ed.), ITER costs are pinned down with caveats (news report on the 2016 baseline review; review committee chaired by A. Wagner; estimate without contingencies). American Institute of Physics, College Park. Observation year 2016. Accessed 2026-11-03.back

6.1The other desks’ editions of this subject

Federation: each desk writes its own edition for the subjects in its remit. Until a desk releases, its edition shows its frame and the reading this edition printed for it.

6.2Three lenses

One edition, read by each steward. The lens of this site comes first.

6.3Standards, Academy and steward contributions

How the Nexus Standards drafts, the Risk Academy and the three stewards feed each quarterly edition for fusion. The standards are a preparatory working draft (2026) and are cited as drafts, never as adopted standards.

6.4GCRI reading: the model card

GCRI’s reading of this edition is its model card: what the national model is, what it computes and where it stops. It is printed in full in Annex A, with the methods it belongs to. Annex A, methodology

6.5Global Risks Forum reading: editorial essays

Four signed essays by the Reports editorial team set out the positions this edition takes. They are interpretation, labelled as such; the evidence they draw on is in the findings register.

6.6Global Risks Alliance reading: 2027 fusion readiness pack

The registers that open the 2027 global cycle. At baseline each is initialised from this edition.

Publication dispositions

• Publish
• Hold
• Needs evidence
• Restricted
• Superseded

6.7Nexus Standards reading: standards and regulatory watch

Instruments and published guidance that shape the systems in this edition, by status on the retrieval date. The edition assesses no one’s compliance.

• IN FORCE
• PUBLISHED
• DRAFT
• PUBLISHED · VOLUNTARY

6.8Risk Academy reading: literature and evidence review, science and assessments

The review behind this edition covers fusion assessments, peer-reviewed science and the institutional reports that bind its findings. Systematic reviews for each agenda item begin in 2027.

Review protocol

Question

What does the published evidence establish about fusion and frontier energy as infrastructure and its couplings?

Sources searched

peer-reviewed journals and preprints; laboratory and project pages; strategies and rules; surveys and fuel-supply analyses

Window

releases available at evidence close, 30 September 2026

Selection

sources that bind or contextualise a finding in this edition

Next step

systematic reviews for agenda items 01 to 05 in 2027

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back
2. 15UK Department for Energy Security and Net Zero (ed.), A new energy revolution: the UK plan for delivering fusion energy (policy paper of 16 March 2026; over GBP 2.5 billion over five years; GBP 1.3 billion for STEP and UK Fusion Energy; the first 100,000 of 127,790 characters were read). UK Government, London. Observation year 2026. Accessed 2026-11-03.back
3. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back
4. 12US Department of Energy (ed.), Energy Department announces Fusion Science and Technology Roadmap to accelerate commercial fusion power (announcement of 16 October 2025; Build-Innovate-Grow; power on the grid by the mid-2030s; no funding commitment). US Department of Energy, Washington. Observation year 2025. Accessed 2026-11-03.back
5. 16Clean Energy Wire (ed.), German government pledges more than EUR 2 bln for nuclear fusion (news report of 2 October 2025; cabinet plan of 1 October 2025). Clean Energy Wire, Berlin. Observation year 2025. Accessed 2026-11-03.back
6. 17World Nuclear News (ed.), Germany boosts funding for fusion research (news report; Fusion Action Plan of October 2025; more than EUR 2 billion by 2029; about EUR 1.7 billion public research funding and up to EUR 755 million from an infrastructure fund). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
7. 18European Commission (ed.), Commission launches call for evidence to support first-ever EU-wide fusion strategy (news item of 6 June 2025; call open to 1 July 2025; strategy then programmed for the end of 2025). Directorate-General for Energy, Brussels. Observation year 2025. Accessed 2026-11-03.back
8. 44UNVERIFIED, not opened: Cabinet Office of Japan (ed.), Fusion Energy Innovation Strategy (national strategy, April 2023), cited from memory. Cabinet Office, Tokyo. Observation year 2023. Accessed 2026-11-03.back
9. 9World Nuclear News (ed.), Fusion entering implementation phase, says Grossi (report on the IAEA World Fusion Outlook 2025; more than 160 devices; private investment above USD 10 billion; October 2025). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
10. 8ITER Organization (ed.), ITER Newsline issue 473 (item on the IAEA World Fusion Outlook 2025, dated 14 October 2025). ITER Organization, Saint-Paul-lez-Durance. Observation year 2025. Accessed 2026-11-03.back
11. 34UNVERIFIED, not opened: Lawson, J.D., Some criteria for a power producing thermonuclear reactor, Proceedings of the Physical Society B 70, 6 to 10, 1957, cited from memory. Observation year 1957. Accessed 2026-11-03.back
12. 35UNVERIFIED, not opened: Zylstra, A.B. et al., Burning plasma achieved in inertial fusion, Nature 601, 542 to 548, 2022, cited from memory. Observation year 2022. Accessed 2026-11-03.back
13. 36UNVERIFIED, not opened: Abu-Shawareb, H. et al., Achievement of target gain larger than unity in an inertial fusion experiment, Physical Review Letters 132, 065102, 2024, cited from memory. Observation year 2024. Accessed 2026-11-03.back
14. 37UNVERIFIED, not opened: Creely, A.J. et al., Overview of the SPARC tokamak, Journal of Plasma Physics 86, 865860502, 2020, cited from memory. Observation year 2020. Accessed 2026-11-03.back
15. 38UNVERIFIED, not opened: Sorbom, B.N. et al., ARC: a compact, high-field, fusion nuclear science facility and demonstration power plant with demountable magnets, Fusion Engineering and Design 100, 378 to 405, 2015, cited from memory. Observation year 2015. Accessed 2026-11-03.back
16. 42UNVERIFIED, not opened: Beidler, C.D. et al., Demonstration of reduced neoclassical energy transport in Wendelstein 7-X, Nature 596, 221 to 226, 2021, cited from memory. Observation year 2021. Accessed 2026-11-03.back
17. 46UNVERIFIED, not opened: Maslov, M. et al., JET D-T scientific programme, Nuclear Fusion 63, 112002, 2023, cited from memory. Observation year 2023. Accessed 2026-11-03.back
18. 41UNVERIFIED, not opened: Knaster, J., Moeslang, A. and Muroga, T., Materials research for fusion, Nature Physics 12, 424 to 434, 2016, cited from memory. Observation year 2016. Accessed 2026-11-03.back
19. 39UNVERIFIED, not opened: Abdou, M. et al., Physics and technology considerations for the deuterium-tritium fuel cycle and conditions for tritium fuel self sufficiency, Nuclear Fusion 61, 013001, 2021, cited from memory. Observation year 2021. Accessed 2026-11-03.back
20. 40UNVERIFIED, not opened: Federici, G. et al., Overview of the DEMO staged design approach in Europe, Nuclear Fusion 59, 066013, 2019, cited from memory. Observation year 2019. Accessed 2026-11-03.back
21. 43UNVERIFIED, not opened: Pearson, R.J., Antoniazzi, A.B. and Nuttall, W.J., Tritium supply and use: a key issue for the development of nuclear fusion energy, Fusion Engineering and Design 136, 1140 to 1148, 2018, cited from memory. Observation year 2018. Accessed 2026-11-03.back
22. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03.back
23. 33UNVERIFIED, not opened: Ward, P. and colleagues, Lithium enrichment threatens to curb fusion deployment, arXiv:2605.04707, 2026, taken from search-result summaries. arXiv, Ithaca. Observation year 2026. Accessed 2026-11-03.back
24. 32UNVERIFIED, not opened: Huang, J. and colleagues, EAST overview paper, IAEA Fusion Energy Conference 2025, seen as a search listing only. Institute of Plasma Physics, Hefei. Observation year 2025. Accessed 2026-11-03.back
25. 45UNVERIFIED, not opened: National Academies of Sciences, Engineering, and Medicine (eds.), Bringing Fusion to the US Grid, consensus report, 2021, cited from memory. National Academies Press, Washington. Observation year 2021. Accessed 2026-11-03.back
26. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03.back
27. 31UNVERIFIED, not opened: IAEA (ed.), World Fusion Outlook 2025 (publication page returned a payment error; figures read through news). International Atomic Energy Agency, Vienna. Observation year 2025. Accessed 2026-11-03.back
28. 11World Nuclear News (ed.), Access to funding remains a major issue for fusion, says FIA (report on the Fusion Industry Association 2025 survey of 23 July 2025: USD 2.64 billion, USD 9.766 billion cumulative, 53 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
29. 21Pearson, R.J., The availability and supply of critical natural resources for the realisation of a fusion pilot plant: fuels for fusion (presentation to the US Department of Energy fusion workshop, 1 to 3 June 2022; lithium-6 is 7.4% of natural lithium; blankets need 30 to 90%; supply effectively zero; a company presentation, weak evidence). Kyoto Fusioneering, London. Observation year 2022. Accessed 2026-11-03.back
30. 22Theiding, T., Tritium: a few kilograms can make or break nuclear fusion (policy blog post of 6 March 2025; about 25 kg of civilian tritium in 2024; a student fellow commentary, weak evidence). Kleinman Center for Energy Policy, University of Pennsylvania, Philadelphia. Observation year 2024. Accessed 2026-11-03.back
31. 24Helion (ed.), Orion, the first fusion power plant (company page; Malaga, Washington; construction from 2025; initial operations stated for 2028; Microsoft agreement for 50 MW; a vendor announcement, weak evidence). Helion Energy, Everett. Observation year 2026. Accessed 2026-11-03.back
32. 23Commonwealth Fusion Systems and Eni (eds.), Eni and CFS sign over USD 1 billion power purchase agreement (joint company release of 22 September 2025; 400 MW ARC plant in Chesterfield County, Virginia; grid connection in the early 2030s; a vendor announcement, weak evidence). Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03.back
33. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
34. 4World Nuclear News (ed.), New world record set in JET final fusion experiments (news report of 9 February 2024; 69 MJ over 5 seconds from 0.2 milligrams of fuel; 59 MJ in 2021). World Nuclear Association, London. Observation year 2024. Accessed 2026-11-03.back
35. 1CEA IRFM (ed.), WEST sets a new plasma duration record (news page; plasma 61299, 12 February 2025, 1,337 seconds, 2 MW lower hybrid heating, 2.6 GJ injected and extracted). Commissariat a l energie atomique et aux energies alternatives, Cadarache. Observation year 2025. Accessed 2026-11-03.back
36. 25Physics Today (ed.), ITER costs are pinned down with caveats (news report on the 2016 baseline review; review committee chaired by A. Wagner; estimate without contingencies). American Institute of Physics, College Park. Observation year 2016. Accessed 2026-11-03.back
37. 26UNVERIFIED, not opened: ITER Organization and press (eds.), ITER 2024 baseline additional cost of about EUR 5 billion, taken from search-result summaries. Observation year 2024. Accessed 2026-11-03.back

7.1Questions for the operational series

1. F-01

   How much tritium is available to start a first plant, and how does stated demand compare with supply by year?

   INI-XT14-FUE-01 · tritium supply and start-up; first output: supply and demand table.

2. F-02

   What lithium-6 enrichment capacity exists, and what do blanket designs need?

   INI-XT14-LIT-02 · lithium-6 and blankets; first output: capacity map.

3. F-03

   What licensing, waste and siting rules apply to first plants in each jurisdiction?

   INI-XT14-LIC-03 · licensing and waste; first output: rule overlay.

4. F-04

   How can gain, duration and power claims be compared on a common basis, including facility electricity?

   INI-XT14-BMK-04 · performance on a common basis; first output: benchmark table.

5. F-05

   How do stated plant dates, public funding and private funding move together?

   INI-XT14-FIN-05 · funding and schedule tracker; first output: tracker.

6. F-06

   Which materials and components limit first-wall and magnet lifetimes?

   To be admitted in 2027; first output: dependence map.

7. F-07

   What workforce exists for fusion engineering, tritium handling and licensing?

   To be admitted in 2027; first output: scoping note.

8. F-08

   Which readiness capabilities have been tested in a real licence or fuel transfer, and which are only planned?

   Readiness capability register; first output: rung evidence for 15 functions.

7.2Portfolio proposed for the Q1 2027 alignment

Five initiatives and one Universe mission candidate are proposed for the 2027 fusion portfolio. They are programme objects: no partner, funder or member is attached to them in this edition.

7.3The pathway

The fusion edition reads national readiness chapters, the coupled sector reports on energy, minerals and materials, and the global edition through one governed evidence graph. At baseline the federation is designed; the global energy and lifeline editions are drafted. This page states what exists today and what comes next.

1. 01

   National readiness chapters

   fusion programme and regulatory readiness in each national edition

   IN PREPARATION · national baselines

2. 02

   Sector couplings

   GS-02 energy · SR-04 minerals · XT-12 materials

   DRAFTED · sector baselines

3. 03

   Technology system model

   devices, fuel cycle, materials, workforce, governance

   v0 SPECIFIED · v1 with federation evidence

4. 04

   Strategic links

   SR-02 lifeline systems · SR-13 strategic technology

   PLANNED · strategic baselines

5. 05

   Universe

   annual proving environment

   CANDIDATE MISSION · mandate in 2027

6. 06

   XT-14 report

   this series

   BASELINE DRAFT · 2027 annual edition

7. 07

   Evidence and correction

   one graph, many projections

   OPEN · first correction cycle in 2027

7.4Universe 2027: evidence pack for the fusion candidate mission

1. 01

   Mandate

2. 02

   Core Build · 1 month

3. 03

   Action · 1 week

4. 04

   Evidence seal

5. 05

   Portfolio correction

6. 06

   Next mandate

Mission

ID

MSN-XT14-2027-01 · First-plant fuel Universe mission

Role spine

Leadership sponsor · Institutional anchor · Mission lead: drawn from national pathways

Receiving actors

to be identified with the mandate

7.5Handoffs and routing

Where the baseline’s findings go next. A handoff routes a finding for awareness, review or work; it transfers no authority.

7.6Feeds and signal register

Escalation routes

• none · keep monitoring
• research question
• project
• risk object
• annual publication
• signal report

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
2. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back
3. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back

8.1Devices and confinement platforms

Fusion devices confine plasma with lasers, magnets or both. Evidence is strongest where a laboratory reports a measured result, and weakest where claims rest on company plans.

Related editions

• GLB Global Systems
• GS-02 Energy
• XT-12 Advanced Materials and Nanotechnology
• XT-15 Advanced Nuclear and Next-Generation Fission
• XT-16 Advanced Energy Storage
• SR-04 Critical Minerals and Strategic Materials

8.2Fuel cycle, tritium and energy balance

Deuterium-tritium plants need tritium, bred inside the plant from lithium, and start-up tritium from outside. Supply of both is thinly measured.

Related editions

• GLB Global Systems
• GS-02 Energy
• XT-12 Advanced Materials and Nanotechnology
• XT-15 Advanced Nuclear and Next-Generation Fission
• XT-16 Advanced Energy Storage
• SR-04 Critical Minerals and Strategic Materials

8.3Materials, lithium and supply chain

Plants need enriched lithium, magnets, structural materials and plasma-facing components. Only lithium-6 has evidence in this edition.

Related editions

• GLB Global Systems
• GS-02 Energy
• XT-12 Advanced Materials and Nanotechnology
• XT-15 Advanced Nuclear and Next-Generation Fission
• XT-16 Advanced Energy Storage
• SR-04 Critical Minerals and Strategic Materials

8.4Economy, investment and workforce

Private funding rose to a record in the 12 months to July 2026 and public programmes expanded. Workforce numbers are the thin part of the evidence.

Related editions

• GLB Global Systems
• GS-02 Energy
• XT-12 Advanced Materials and Nanotechnology
• XT-15 Advanced Nuclear and Next-Generation Fission
• XT-16 Advanced Energy Storage
• SR-04 Critical Minerals and Strategic Materials

8.5Safety, licensing and governance watch

The nearest effect of fusion on other infrastructure is regulatory. The US has proposed a licensing framework, and the UK, Germany and the EU have plans.

Related editions

• GLB Global Systems
• GS-02 Energy
• XT-12 Advanced Materials and Nanotechnology
• XT-15 Advanced Nuclear and Next-Generation Fission
• XT-16 Advanced Energy Storage
• SR-04 Critical Minerals and Strategic Materials

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
2. 4World Nuclear News (ed.), New world record set in JET final fusion experiments (news report of 9 February 2024; 69 MJ over 5 seconds from 0.2 milligrams of fuel; 59 MJ in 2021). World Nuclear Association, London. Observation year 2024. Accessed 2026-11-03.back
3. 1CEA IRFM (ed.), WEST sets a new plasma duration record (news page; plasma 61299, 12 February 2025, 1,337 seconds, 2 MW lower hybrid heating, 2.6 GJ injected and extracted). Commissariat a l energie atomique et aux energies alternatives, Cadarache. Observation year 2025. Accessed 2026-11-03.back
4. 6Lawrence Livermore National Laboratory (ed.), NIF fusion ignition shot hailed as historic scientific feat (news page; shot of 5 December 2022, 3.15 MJ from 2.05 MJ; announced 13 December 2022). Lawrence Livermore National Laboratory, Livermore. Observation year 2022. Accessed 2026-11-03.back
5. 2Physics World (ed.), China experimental advanced superconducting tokamak smashes fusion confinement record (news report; EAST 1066 seconds in high confinement, January 2025; earlier 403 seconds in 2023). IOP Publishing, Bristol. Observation year 2025. Accessed 2026-11-03.back
6. 3World Nuclear News (ed.), Wendelstein 7-X sets new fusion performance records (news report of 4 June 2025; long-pulse triple product held for 43 seconds; announcement by the research institute and EUROfusion; peer-reviewed article not yet published at announcement). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
7. 42UNVERIFIED, not opened: Beidler, C.D. et al., Demonstration of reduced neoclassical energy transport in Wendelstein 7-X, Nature 596, 221 to 226, 2021, cited from memory. Observation year 2021. Accessed 2026-11-03.back
8. 24Helion (ed.), Orion, the first fusion power plant (company page; Malaga, Washington; construction from 2025; initial operations stated for 2028; Microsoft agreement for 50 MW; a vendor announcement, weak evidence). Helion Energy, Everett. Observation year 2026. Accessed 2026-11-03.back
9. 23Commonwealth Fusion Systems and Eni (eds.), Eni and CFS sign over USD 1 billion power purchase agreement (joint company release of 22 September 2025; 400 MW ARC plant in Chesterfield County, Virginia; grid connection in the early 2030s; a vendor announcement, weak evidence). Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03.back
10. 29UNVERIFIED, not opened: Commonwealth Fusion Systems (ed.), SPARC status, first plasma reported as a 2027 target, taken from search-result summaries and secondary pages. Commonwealth Fusion Systems, Devens. Observation year 2026. Accessed 2026-11-03.back
11. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03.back
12. 22Theiding, T., Tritium: a few kilograms can make or break nuclear fusion (policy blog post of 6 March 2025; about 25 kg of civilian tritium in 2024; a student fellow commentary, weak evidence). Kleinman Center for Energy Policy, University of Pennsylvania, Philadelphia. Observation year 2024. Accessed 2026-11-03.back
13. 21Pearson, R.J., The availability and supply of critical natural resources for the realisation of a fusion pilot plant: fuels for fusion (presentation to the US Department of Energy fusion workshop, 1 to 3 June 2022; lithium-6 is 7.4% of natural lithium; blankets need 30 to 90%; supply effectively zero; a company presentation, weak evidence). Kyoto Fusioneering, London. Observation year 2022. Accessed 2026-11-03.back
14. 39UNVERIFIED, not opened: Abdou, M. et al., Physics and technology considerations for the deuterium-tritium fuel cycle and conditions for tritium fuel self sufficiency, Nuclear Fusion 61, 013001, 2021, cited from memory. Observation year 2021. Accessed 2026-11-03.back
15. 33UNVERIFIED, not opened: Ward, P. and colleagues, Lithium enrichment threatens to curb fusion deployment, arXiv:2605.04707, 2026, taken from search-result summaries. arXiv, Ithaca. Observation year 2026. Accessed 2026-11-03.back
16. 41UNVERIFIED, not opened: Knaster, J., Moeslang, A. and Muroga, T., Materials research for fusion, Nature Physics 12, 424 to 434, 2016, cited from memory. Observation year 2016. Accessed 2026-11-03.back
17. 15UK Department for Energy Security and Net Zero (ed.), A new energy revolution: the UK plan for delivering fusion energy (policy paper of 16 March 2026; over GBP 2.5 billion over five years; GBP 1.3 billion for STEP and UK Fusion Energy; the first 100,000 of 127,790 characters were read). UK Government, London. Observation year 2026. Accessed 2026-11-03.back
18. 12US Department of Energy (ed.), Energy Department announces Fusion Science and Technology Roadmap to accelerate commercial fusion power (announcement of 16 October 2025; Build-Innovate-Grow; power on the grid by the mid-2030s; no funding commitment). US Department of Energy, Washington. Observation year 2025. Accessed 2026-11-03.back
19. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back
20. 16Clean Energy Wire (ed.), German government pledges more than EUR 2 bln for nuclear fusion (news report of 2 October 2025; cabinet plan of 1 October 2025). Clean Energy Wire, Berlin. Observation year 2025. Accessed 2026-11-03.back
21. 19American Nuclear Society (ed.), China launches fusion-focused company (news report of 30 July 2025; China Fusion Energy Co., 15 billion yuan registered capital, subsidiary of a state nuclear group; BEST tokamak in Hefei hoped for 2027). American Nuclear Society, La Grange Park. Observation year 2025. Accessed 2026-11-03.back
22. 13American Nuclear Society (ed.), DOE picks eight fusion companies to design pilot power plants (news report of 2 June 2023; USD 46 million milestone programme; the page was read to the paywall). American Nuclear Society, La Grange Park. Observation year 2023. Accessed 2026-11-03.back
23. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back
24. 18European Commission (ed.), Commission launches call for evidence to support first-ever EU-wide fusion strategy (news item of 6 June 2025; call open to 1 July 2025; strategy then programmed for the end of 2025). Directorate-General for Energy, Brussels. Observation year 2025. Accessed 2026-11-03.back
25. 9World Nuclear News (ed.), Fusion entering implementation phase, says Grossi (report on the IAEA World Fusion Outlook 2025; more than 160 devices; private investment above USD 10 billion; October 2025). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back

A.1Methods

The global baseline uses published values and four simple derivations. Each is shown in full so that any reader can reproduce it.

A.2Model card, Fusion System Model v0

Model ID

MDL-XT14-FUSION · v0.1

Purpose

represent fusion and frontier energy as infrastructure coupled to energy, fuel supply, materials, finance, workforce and licensing

Family

graph-based system of systems

Inputs

the cited sources of this edition; no proprietary data

Method

expert-specified coupling strengths (STRONG · MODERATE · WEAK) from assessments and analogue events

Validation

none yet, first validation against federation evidence in 2027

Uncertainty

qualitative; strengths are hypotheses, not measurements

Domain of validity

global scale; not for asset-, site- or country-level use

Reproducibility

strength table and sources published in this edition

A.3The baseline evidence cut

Every Nexus edition is published from a frozen evidence cut. The global baseline cut is documentary: it pins the exact edition of every source cited. Federation cuts begin with the first national Foundry cuts in 2027.

Cut ID

DC-XTECH-FUSION-GLOBAL-2026-B0

Type

baseline documentary cut

Resolution policy

pinned · as of 30 September 2026

Sources pinned

46 cited sources, each at the edition and access date in the references

Model runs

none at baseline, analytical values are stated with their method

Digest

computed at freeze and recorded in the publication record

Supersedes

nothing, first cut of the series

Superseded by

the 2027 fusion annual cut

Lineage

1. 01

   source edition

2. 02

   pinned citation

3. 03

   finding

4. 04

   page

5. 05

   publication record

A.4Evidence age and coverage

A 2026 global edition rests on evidence observed in many different years. This page shows each time base, so that no single year label hides older evidence.

A.5Evidence cards, two anchor sources

Evidence cards to follow in 2027

• LLNL⁵: refurbished shots and a facility electricity figure
• ITER⁷: Council decisions on the baseline
• NRC¹⁴: final text of the rule
• Coleman and Kovari²⁰: updated supply scenarios

A.6Publication acceptance record

Editorial self-check at evidence close. Every applicable item carries a disposition; the remaining items are review, approval and deposit.

A.7Status words

A.8How the edition is made, released and corrected

Every edition is built from a sealed evidence cut, reviewed under three keys, signed and deposited before any site shows it as published; corrections go to Nexus Standards as change proposals and feed the next cut.

A teaching model of the process, not a forecast and not a record of any run; dates and counts on this page come from the programme record. Sources: Reports governance at GCRI Canada (2026); Zenodo, repository of record for Reports deposits (2026).

Lifecycle, one state at a time: Draft, Computed, Evidence bound, Reviewed, Approved for release, Published, Corrected, Superseded. This edition is a draft.

A.9Glossary and abbreviations

A.10Technical annex

A.1 · indicator definition: target gain

Construct

fusion energy produced divided by the laser energy delivered to the target

Unit

times

Method

yield and laser energy as reported by the laboratory for a single shot

Source

Lawrence Livermore National Laboratory annual report⁵

Uncertainty

no uncertainty is stated on the page read

Known limits

laser energy on target only; facility electricity is not included; one facility

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 24Helion (ed.), Orion, the first fusion power plant (company page; Malaga, Washington; construction from 2025; initial operations stated for 2028; Microsoft agreement for 50 MW; a vendor announcement, weak evidence). Helion Energy, Everett. Observation year 2026. Accessed 2026-11-03.back
2. 23Commonwealth Fusion Systems and Eni (eds.), Eni and CFS sign over USD 1 billion power purchase agreement (joint company release of 22 September 2025; 400 MW ARC plant in Chesterfield County, Virginia; grid connection in the early 2030s; a vendor announcement, weak evidence). Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03.back
3. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
4. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03.back
5. 22Theiding, T., Tritium: a few kilograms can make or break nuclear fusion (policy blog post of 6 March 2025; about 25 kg of civilian tritium in 2024; a student fellow commentary, weak evidence). Kleinman Center for Energy Policy, University of Pennsylvania, Philadelphia. Observation year 2024. Accessed 2026-11-03.back
6. 21Pearson, R.J., The availability and supply of critical natural resources for the realisation of a fusion pilot plant: fuels for fusion (presentation to the US Department of Energy fusion workshop, 1 to 3 June 2022; lithium-6 is 7.4% of natural lithium; blankets need 30 to 90%; supply effectively zero; a company presentation, weak evidence). Kyoto Fusioneering, London. Observation year 2022. Accessed 2026-11-03.back
7. 33UNVERIFIED, not opened: Ward, P. and colleagues, Lithium enrichment threatens to curb fusion deployment, arXiv:2605.04707, 2026, taken from search-result summaries. arXiv, Ithaca. Observation year 2026. Accessed 2026-11-03.back
8. 26UNVERIFIED, not opened: ITER Organization and press (eds.), ITER 2024 baseline additional cost of about EUR 5 billion, taken from search-result summaries. Observation year 2024. Accessed 2026-11-03.back
9. 29UNVERIFIED, not opened: Commonwealth Fusion Systems (ed.), SPARC status, first plasma reported as a 2027 target, taken from search-result summaries and secondary pages. Commonwealth Fusion Systems, Devens. Observation year 2026. Accessed 2026-11-03.back
10. 27UNVERIFIED, not opened: Commonwealth Fusion Systems (ed.), offtake agreement with Google for 200 MW from the Virginia ARC plant, June 2025, taken from search-result summaries. Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03.back
11. 28UNVERIFIED, not opened: Helion (ed.), Helion secures land and begins building on the site of the first fusion power plant, release of 30 July 2025 (the release page returned a block) and the 2023 Microsoft agreement, taken from search-result summaries. Helion Energy, Everett. Observation year 2025. Accessed 2026-11-03.back
12. 30UNVERIFIED, not opened: Fusion Industry Association (ed.), The Global Fusion Industry in 2026 (report page returned an error; figures read through a news service). Fusion Industry Association, Washington. Observation year 2026. Accessed 2026-11-03.back
13. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back
14. 31UNVERIFIED, not opened: IAEA (ed.), World Fusion Outlook 2025 (publication page returned a payment error; figures read through news). International Atomic Energy Agency, Vienna. Observation year 2025. Accessed 2026-11-03.back
15. 9World Nuclear News (ed.), Fusion entering implementation phase, says Grossi (report on the IAEA World Fusion Outlook 2025; more than 160 devices; private investment above USD 10 billion; October 2025). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
16. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back
17. 18European Commission (ed.), Commission launches call for evidence to support first-ever EU-wide fusion strategy (news item of 6 June 2025; call open to 1 July 2025; strategy then programmed for the end of 2025). Directorate-General for Energy, Brussels. Observation year 2025. Accessed 2026-11-03.back
18. 15UK Department for Energy Security and Net Zero (ed.), A new energy revolution: the UK plan for delivering fusion energy (policy paper of 16 March 2026; over GBP 2.5 billion over five years; GBP 1.3 billion for STEP and UK Fusion Energy; the first 100,000 of 127,790 characters were read). UK Government, London. Observation year 2026. Accessed 2026-11-03.back
19. 16Clean Energy Wire (ed.), German government pledges more than EUR 2 bln for nuclear fusion (news report of 2 October 2025; cabinet plan of 1 October 2025). Clean Energy Wire, Berlin. Observation year 2025. Accessed 2026-11-03.back
20. 19American Nuclear Society (ed.), China launches fusion-focused company (news report of 30 July 2025; China Fusion Energy Co., 15 billion yuan registered capital, subsidiary of a state nuclear group; BEST tokamak in Hefei hoped for 2027). American Nuclear Society, La Grange Park. Observation year 2025. Accessed 2026-11-03.back
21. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03.back

B.1The indicator set

B.2Global source register

The governed source set behind this edition. Each source keeps its authority, coverage, cadence and role; categories describe origin, not truth.

Domains bound by the register

• INF
• FIN
• MIN
• ENE
• GOV
• CLI
• TRD
• WAT
• HLT
• FOO

B.3Regional reading, fusion across ten clusters

Regional plates follow with the regional editions. This page gives the regional reading of fusion infrastructure and exposure in table form and ranks no region.

B.4Cluster card: tritium and lithium fuel cycle

• fuel cycle
• tritium
• lithium-6
• single point

Systems in view

heavy-water reactors, tritium stores, enrichment, breeding blankets

Defining events

first plants stated for the 2030s with start-up fuel unresolved²⁰²¹

Couplings

MIN → INF fuel; TRD → MIN transfer rules

Capability evidence

blanket and breeding research reported³⁹²¹

Gaps

inventory; start-up demand; lithium-6 capacity

Agenda items

F-01 · F-02

B.5How countries appear in the fusion edition

Countries enter the fusion edition through the readiness chapters of their own national editions, on one card grammar. They are read against peer distributions and thresholds, never ranked.

Editions in the 2026 Baseline programme

How to read a country card

• Each system is shown against the distribution of its peers, with thresholds where they exist
• Couplings and risk objects come from the country’s own national edition
• Capability rungs record evidence, not a judgement of institutions
• Evidence age is printed, so older national data are visible as such

B.6Licences

B.7Formats and provenance

Provenance

Edition pack

The edition’s content pack (JSON), from which the print and web editions are built

Evidence cut

DC-XTECH-FUSION-GLOBAL-2026-B0, closed 30 September 2026

Reproducibility

sourced values cited; analytical values reproducible from stated parameters

Self-check

14 of 23 at evidence close; a fail on any item blocks release

Review

five passes scheduled before release (in Annex C)

Publisher of record

GCRI for the Nexus Consortium

Corrections

Registry correction pathway; upheld corrections are published as notices with a new version

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

1. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03.back
2. 6Lawrence Livermore National Laboratory (ed.), NIF fusion ignition shot hailed as historic scientific feat (news page; shot of 5 December 2022, 3.15 MJ from 2.05 MJ; announced 13 December 2022). Lawrence Livermore National Laboratory, Livermore. Observation year 2022. Accessed 2026-11-03.back
3. 4World Nuclear News (ed.), New world record set in JET final fusion experiments (news report of 9 February 2024; 69 MJ over 5 seconds from 0.2 milligrams of fuel; 59 MJ in 2021). World Nuclear Association, London. Observation year 2024. Accessed 2026-11-03.back
4. 1CEA IRFM (ed.), WEST sets a new plasma duration record (news page; plasma 61299, 12 February 2025, 1,337 seconds, 2 MW lower hybrid heating, 2.6 GJ injected and extracted). Commissariat a l energie atomique et aux energies alternatives, Cadarache. Observation year 2025. Accessed 2026-11-03.back
5. 2Physics World (ed.), China experimental advanced superconducting tokamak smashes fusion confinement record (news report; EAST 1066 seconds in high confinement, January 2025; earlier 403 seconds in 2023). IOP Publishing, Bristol. Observation year 2025. Accessed 2026-11-03.back
6. 3World Nuclear News (ed.), Wendelstein 7-X sets new fusion performance records (news report of 4 June 2025; long-pulse triple product held for 43 seconds; announcement by the research institute and EUROfusion; peer-reviewed article not yet published at announcement). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
7. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03.back
8. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03.back
9. 15UK Department for Energy Security and Net Zero (ed.), A new energy revolution: the UK plan for delivering fusion energy (policy paper of 16 March 2026; over GBP 2.5 billion over five years; GBP 1.3 billion for STEP and UK Fusion Energy; the first 100,000 of 127,790 characters were read). UK Government, London. Observation year 2026. Accessed 2026-11-03.back
10. 16Clean Energy Wire (ed.), German government pledges more than EUR 2 bln for nuclear fusion (news report of 2 October 2025; cabinet plan of 1 October 2025). Clean Energy Wire, Berlin. Observation year 2025. Accessed 2026-11-03.back
11. 9World Nuclear News (ed.), Fusion entering implementation phase, says Grossi (report on the IAEA World Fusion Outlook 2025; more than 160 devices; private investment above USD 10 billion; October 2025). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
12. 11World Nuclear News (ed.), Access to funding remains a major issue for fusion, says FIA (report on the Fusion Industry Association 2025 survey of 23 July 2025: USD 2.64 billion, USD 9.766 billion cumulative, 53 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03.back
13. 12US Department of Energy (ed.), Energy Department announces Fusion Science and Technology Roadmap to accelerate commercial fusion power (announcement of 16 October 2025; Build-Innovate-Grow; power on the grid by the mid-2030s; no funding commitment). US Department of Energy, Washington. Observation year 2025. Accessed 2026-11-03.back
14. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03.back
15. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03.back
16. 19American Nuclear Society (ed.), China launches fusion-focused company (news report of 30 July 2025; China Fusion Energy Co., 15 billion yuan registered capital, subsidiary of a state nuclear group; BEST tokamak in Hefei hoped for 2027). American Nuclear Society, La Grange Park. Observation year 2025. Accessed 2026-11-03.back
17. 21Pearson, R.J., The availability and supply of critical natural resources for the realisation of a fusion pilot plant: fuels for fusion (presentation to the US Department of Energy fusion workshop, 1 to 3 June 2022; lithium-6 is 7.4% of natural lithium; blankets need 30 to 90%; supply effectively zero; a company presentation, weak evidence). Kyoto Fusioneering, London. Observation year 2022. Accessed 2026-11-03.back
18. 39UNVERIFIED, not opened: Abdou, M. et al., Physics and technology considerations for the deuterium-tritium fuel cycle and conditions for tritium fuel self sufficiency, Nuclear Fusion 61, 013001, 2021, cited from memory. Observation year 2021. Accessed 2026-11-03.back

C.146 sources

NR-CIT-1, editor first. A DOI is linked where the source has one; Nexus records carry a UNI once the catalogue allocates it (NS-1).

1. 1CEA IRFM (ed.), WEST sets a new plasma duration record (news page; plasma 61299, 12 February 2025, 1,337 seconds, 2 MW lower hybrid heating, 2.6 GJ injected and extracted). Commissariat a l energie atomique et aux energies alternatives, Cadarache. Observation year 2025. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 3, chapter 4, chapter 6, chapter 8
2. 2Physics World (ed.), China experimental advanced superconducting tokamak smashes fusion confinement record (news report; EAST 1066 seconds in high confinement, January 2025; earlier 403 seconds in 2023). IOP Publishing, Bristol. Observation year 2025. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 8
3. 3World Nuclear News (ed.), Wendelstein 7-X sets new fusion performance records (news report of 4 June 2025; long-pulse triple product held for 43 seconds; announcement by the research institute and EUROfusion; peer-reviewed article not yet published at announcement). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03. Cited in chapter 2, chapter 8
4. 4World Nuclear News (ed.), New world record set in JET final fusion experiments (news report of 9 February 2024; 69 MJ over 5 seconds from 0.2 milligrams of fuel; 59 MJ in 2021). World Nuclear Association, London. Observation year 2024. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 3, chapter 4, chapter 6, chapter 8
5. 5Lawrence Livermore National Laboratory (ed.), National Ignition Facility 2025 (annual report page; 8.6 MJ on 7 April 2025 from 2.08 MJ delivered, target gain 4.13; refurbishment and enhanced yield capability to 2.6 MJ). Lawrence Livermore National Laboratory, Livermore. Observation year 2025. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 3, chapter 4, chapter 6, chapter 7, chapter 8
6. 6Lawrence Livermore National Laboratory (ed.), NIF fusion ignition shot hailed as historic scientific feat (news page; shot of 5 December 2022, 3.15 MJ from 2.05 MJ; announced 13 December 2022). Lawrence Livermore National Laboratory, Livermore. Observation year 2022. Accessed 2026-11-03. Cited in the summary, chapter 2, chapter 8
7. 7ITER Organization (ed.), ITER in a few lines (project page; baseline reviewed by the ITER Council in November 2024; start of research operation 2034; deuterium-tritium operation 2039; Q of 10, 500 MW from 50 MW). ITER Organization, Saint-Paul-lez-Durance. Observation year 2026. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 3, chapter 4, chapter 5, chapter 6
8. 8ITER Organization (ed.), ITER Newsline issue 473 (item on the IAEA World Fusion Outlook 2025, dated 14 October 2025). ITER Organization, Saint-Paul-lez-Durance. Observation year 2025. Accessed 2026-11-03. Cited in chapter 6
9. 9World Nuclear News (ed.), Fusion entering implementation phase, says Grossi (report on the IAEA World Fusion Outlook 2025; more than 160 devices; private investment above USD 10 billion; October 2025). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03. Cited in the summary, chapter 4, chapter 6, chapter 8
10. 10World Nuclear News (ed.), Fusion industry raised USD4.5 billion in past year, report says (14 July 2026; Fusion Industry Association 2026 survey: USD 4.48 billion in 12 months, USD 14.24 billion cumulative, 56 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2026. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 3, chapter 4, chapter 6, chapter 7, chapter 8
11. 11World Nuclear News (ed.), Access to funding remains a major issue for fusion, says FIA (report on the Fusion Industry Association 2025 survey of 23 July 2025: USD 2.64 billion, USD 9.766 billion cumulative, 53 companies; an industry survey, weak evidence). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03. Cited in chapter 2, chapter 6
12. 12US Department of Energy (ed.), Energy Department announces Fusion Science and Technology Roadmap to accelerate commercial fusion power (announcement of 16 October 2025; Build-Innovate-Grow; power on the grid by the mid-2030s; no funding commitment). US Department of Energy, Washington. Observation year 2025. Accessed 2026-11-03. Cited in chapter 1, chapter 2, chapter 4, chapter 6, chapter 8
13. 13American Nuclear Society (ed.), DOE picks eight fusion companies to design pilot power plants (news report of 2 June 2023; USD 46 million milestone programme; the page was read to the paywall). American Nuclear Society, La Grange Park. Observation year 2023. Accessed 2026-11-03. Cited in chapter 8
14. 14US Nuclear Regulatory Commission (ed.), Federal Register notice of 26 February 2026, proposed rule on regulatory framework for fusion machines (10 CFR part 30; comments due 27 May 2026; the first 100,000 of 168,363 characters were read). Office of the Federal Register, Washington. Observation year 2026. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 3, chapter 4, chapter 6, chapter 7, chapter 8
15. 15UK Department for Energy Security and Net Zero (ed.), A new energy revolution: the UK plan for delivering fusion energy (policy paper of 16 March 2026; over GBP 2.5 billion over five years; GBP 1.3 billion for STEP and UK Fusion Energy; the first 100,000 of 127,790 characters were read). UK Government, London. Observation year 2026. Accessed 2026-11-03. Cited in the summary, chapter 2, chapter 3, chapter 4, chapter 6, chapter 8
16. 16Clean Energy Wire (ed.), German government pledges more than EUR 2 bln for nuclear fusion (news report of 2 October 2025; cabinet plan of 1 October 2025). Clean Energy Wire, Berlin. Observation year 2025. Accessed 2026-11-03. Cited in the summary, chapter 2, chapter 3, chapter 4, chapter 6, chapter 8
17. 17World Nuclear News (ed.), Germany boosts funding for fusion research (news report; Fusion Action Plan of October 2025; more than EUR 2 billion by 2029; about EUR 1.7 billion public research funding and up to EUR 755 million from an infrastructure fund). World Nuclear Association, London. Observation year 2025. Accessed 2026-11-03. Cited in chapter 2, chapter 6
18. 18European Commission (ed.), Commission launches call for evidence to support first-ever EU-wide fusion strategy (news item of 6 June 2025; call open to 1 July 2025; strategy then programmed for the end of 2025). Directorate-General for Energy, Brussels. Observation year 2025. Accessed 2026-11-03. Cited in chapter 4, chapter 6, chapter 8
19. 19American Nuclear Society (ed.), China launches fusion-focused company (news report of 30 July 2025; China Fusion Energy Co., 15 billion yuan registered capital, subsidiary of a state nuclear group; BEST tokamak in Hefei hoped for 2027). American Nuclear Society, La Grange Park. Observation year 2025. Accessed 2026-11-03. Cited in chapter 2, chapter 8
20. 20Coleman, M. and Kovari, M., Global supply of tritium for fusion R and D from heavy water reactors (conference paper, UK Atomic Energy Authority; abstract and introduction read from the PDF; 0 to 27.7 kg available in 2055 across scenarios; 7.4 kg for a demonstration reactor in 2055 in one case). UK Atomic Energy Authority, Abingdon. Observation year 2018. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 4, chapter 5, chapter 6, chapter 8
21. 21Pearson, R.J., The availability and supply of critical natural resources for the realisation of a fusion pilot plant: fuels for fusion (presentation to the US Department of Energy fusion workshop, 1 to 3 June 2022; lithium-6 is 7.4% of natural lithium; blankets need 30 to 90%; supply effectively zero; a company presentation, weak evidence). Kyoto Fusioneering, London. Observation year 2022. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 4, chapter 6, chapter 8
22. 22Theiding, T., Tritium: a few kilograms can make or break nuclear fusion (policy blog post of 6 March 2025; about 25 kg of civilian tritium in 2024; a student fellow commentary, weak evidence). Kleinman Center for Energy Policy, University of Pennsylvania, Philadelphia. Observation year 2024. Accessed 2026-11-03. Cited in chapter 2, chapter 3, chapter 4, chapter 6, chapter 8
23. 23Commonwealth Fusion Systems and Eni (eds.), Eni and CFS sign over USD 1 billion power purchase agreement (joint company release of 22 September 2025; 400 MW ARC plant in Chesterfield County, Virginia; grid connection in the early 2030s; a vendor announcement, weak evidence). Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 3, chapter 6, chapter 8
24. 24Helion (ed.), Orion, the first fusion power plant (company page; Malaga, Washington; construction from 2025; initial operations stated for 2028; Microsoft agreement for 50 MW; a vendor announcement, weak evidence). Helion Energy, Everett. Observation year 2026. Accessed 2026-11-03. Cited in the summary, chapter 1, chapter 2, chapter 3, chapter 6, chapter 8
25. 25Physics Today (ed.), ITER costs are pinned down with caveats (news report on the 2016 baseline review; review committee chaired by A. Wagner; estimate without contingencies). American Institute of Physics, College Park. Observation year 2016. Accessed 2026-11-03. Cited in chapter 1, chapter 2, chapter 4, chapter 5, chapter 6
26. 26UNVERIFIED, not opened: ITER Organization and press (eds.), ITER 2024 baseline additional cost of about EUR 5 billion, taken from search-result summaries. Observation year 2024. Accessed 2026-11-03. Cited in chapter 6
27. 27UNVERIFIED, not opened: Commonwealth Fusion Systems (ed.), offtake agreement with Google for 200 MW from the Virginia ARC plant, June 2025, taken from search-result summaries. Commonwealth Fusion Systems, Devens. Observation year 2025. Accessed 2026-11-03.
28. 28UNVERIFIED, not opened: Helion (ed.), Helion secures land and begins building on the site of the first fusion power plant, release of 30 July 2025 (the release page returned a block) and the 2023 Microsoft agreement, taken from search-result summaries. Helion Energy, Everett. Observation year 2025. Accessed 2026-11-03. Cited in chapter 2
29. 29UNVERIFIED, not opened: Commonwealth Fusion Systems (ed.), SPARC status, first plasma reported as a 2027 target, taken from search-result summaries and secondary pages. Commonwealth Fusion Systems, Devens. Observation year 2026. Accessed 2026-11-03. Cited in chapter 8
30. 30UNVERIFIED, not opened: Fusion Industry Association (ed.), The Global Fusion Industry in 2026 (report page returned an error; figures read through a news service). Fusion Industry Association, Washington. Observation year 2026. Accessed 2026-11-03.
31. 31UNVERIFIED, not opened: IAEA (ed.), World Fusion Outlook 2025 (publication page returned a payment error; figures read through news). International Atomic Energy Agency, Vienna. Observation year 2025. Accessed 2026-11-03. Cited in chapter 6
32. 32UNVERIFIED, not opened: Huang, J. and colleagues, EAST overview paper, IAEA Fusion Energy Conference 2025, seen as a search listing only. Institute of Plasma Physics, Hefei. Observation year 2025. Accessed 2026-11-03. Cited in chapter 6
33. 33UNVERIFIED, not opened: Ward, P. and colleagues, Lithium enrichment threatens to curb fusion deployment, arXiv:2605.04707, 2026, taken from search-result summaries. arXiv, Ithaca. Observation year 2026. Accessed 2026-11-03. Cited in chapter 2, chapter 4, chapter 6, chapter 8
34. 34UNVERIFIED, not opened: Lawson, J.D., Some criteria for a power producing thermonuclear reactor, Proceedings of the Physical Society B 70, 6 to 10, 1957, cited from memory. Observation year 1957. Accessed 2026-11-03. Cited in chapter 6
35. 35UNVERIFIED, not opened: Zylstra, A.B. et al., Burning plasma achieved in inertial fusion, Nature 601, 542 to 548, 2022, cited from memory. Observation year 2022. Accessed 2026-11-03. Cited in chapter 4, chapter 6
36. 36UNVERIFIED, not opened: Abu-Shawareb, H. et al., Achievement of target gain larger than unity in an inertial fusion experiment, Physical Review Letters 132, 065102, 2024, cited from memory. Observation year 2024. Accessed 2026-11-03. Cited in chapter 4, chapter 6
37. 37UNVERIFIED, not opened: Creely, A.J. et al., Overview of the SPARC tokamak, Journal of Plasma Physics 86, 865860502, 2020, cited from memory. Observation year 2020. Accessed 2026-11-03. Cited in chapter 6
38. 38UNVERIFIED, not opened: Sorbom, B.N. et al., ARC: a compact, high-field, fusion nuclear science facility and demonstration power plant with demountable magnets, Fusion Engineering and Design 100, 378 to 405, 2015, cited from memory. Observation year 2015. Accessed 2026-11-03. Cited in chapter 6
39. 39UNVERIFIED, not opened: Abdou, M. et al., Physics and technology considerations for the deuterium-tritium fuel cycle and conditions for tritium fuel self sufficiency, Nuclear Fusion 61, 013001, 2021, cited from memory. Observation year 2021. Accessed 2026-11-03. Cited in chapter 6, chapter 8
40. 40UNVERIFIED, not opened: Federici, G. et al., Overview of the DEMO staged design approach in Europe, Nuclear Fusion 59, 066013, 2019, cited from memory. Observation year 2019. Accessed 2026-11-03. Cited in chapter 6
41. 41UNVERIFIED, not opened: Knaster, J., Moeslang, A. and Muroga, T., Materials research for fusion, Nature Physics 12, 424 to 434, 2016, cited from memory. Observation year 2016. Accessed 2026-11-03. Cited in chapter 6, chapter 8
42. 42UNVERIFIED, not opened: Beidler, C.D. et al., Demonstration of reduced neoclassical energy transport in Wendelstein 7-X, Nature 596, 221 to 226, 2021, cited from memory. Observation year 2021. Accessed 2026-11-03. Cited in chapter 6, chapter 8
43. 43UNVERIFIED, not opened: Pearson, R.J., Antoniazzi, A.B. and Nuttall, W.J., Tritium supply and use: a key issue for the development of nuclear fusion energy, Fusion Engineering and Design 136, 1140 to 1148, 2018, cited from memory. Observation year 2018. Accessed 2026-11-03. Cited in chapter 6
44. 44UNVERIFIED, not opened: Cabinet Office of Japan (ed.), Fusion Energy Innovation Strategy (national strategy, April 2023), cited from memory. Cabinet Office, Tokyo. Observation year 2023. Accessed 2026-11-03. Cited in chapter 6
45. 45UNVERIFIED, not opened: National Academies of Sciences, Engineering, and Medicine (eds.), Bringing Fusion to the US Grid, consensus report, 2021, cited from memory. National Academies Press, Washington. Observation year 2021. Accessed 2026-11-03. Cited in chapter 6
46. 46UNVERIFIED, not opened: Maslov, M. et al., JET D-T scientific programme, Nuclear Fusion 63, 112002, 2023, cited from memory. Observation year 2023. Accessed 2026-11-03. Cited in chapter 4, chapter 6

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