Infinity One is Type One Energy's prototype stellarator and workforce-training facility, to be installed in a repurposed section of TVA's retired Bull Run coal plant. It will not sell electricity; groundbreaking has slipped to the first half of 2027 with commissioning targeted for 2029.
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Current state
| Status | Licensing |
| Country | United States |
| Location | TVA Bull Run Energy Complex, Clinton, Tennessee |
| Developer | Type One Energy |
| Developer type | Public-private |
| Concept | Stellarator |
| Purpose | Demonstration |
| First plasma target | 2029 |
| Site | Retired TVA Bull Run coal plant; groundbreaking planned H1 2027 |
| Private funding raised | USD 400m (as of 2026-10-06) |
| Public funding | DOE Milestone-Based Fusion Development Program awardee; TVA site partnership |
| Regulation | Tennessee (TDEC) issued the first US fusion-specific byproduct material license for Project Infinity at Bull Run on 2026-08-31 under state rules effective 2026-06-09. |
Notes
developer type set to public-private given TVA (federal utility) partnership; Type One itself is private. private funding raised is the company-wide 'more than $400 million' (Reuters/PitchBook) after the $200M Series B (Oct 2026). Whether the Aug 2026 license covers Infinity One, Infinity Two or both is not clear from available reporting. first plasma target reflects 2029 commissioning/startup.
Timeline
- 2026-01-30 — Type One filed an initial byproduct material licence application for its Bull Run fusion project with TVA and TDEC. (source)
- 2026-08-31 — Tennessee issued Type One the first US fusion-specific byproduct material license for Project Infinity at Bull Run. (source)
- 2026-10-06 — Type One closed a $200 million Series B and said Infinity One groundbreaking would move to the first half of 2027. (source)
The timeline is append-only: corrections are added as new entries. Stated targets appear in the current-state table, never as milestones.
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About Infinity One
About Type One Energy
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Sources
- Type One Energy initiates licensing of fusion power plant — World Nuclear News, checked 2026-10-11
- A Regulatory Breakthrough for Fusion: The Bull Run Energy Complex — Type One Energy (primary), checked 2026-10-11
- Tennessee Grants First U.S. Fusion License — CRBC News, checked 2026-10-11
- Type One Raises $200M in Series B Round as Tennessee Fusion Project Nears Construction — ENR, checked 2026-10-11
- Type One Energy Raises $200M for 400-MW Fusion Plant — MLQ, checked 2026-10-11
- Fusion firm Type One in $200 million Siemens Energy-backed raise (Reuters) — Reuters via KSL, checked 2026-10-11