Infinity Two is Type One Energy's planned ~400 MWe stellarator fusion power plant at TVA's Bull Run site, under a 2025 TVA letter of intent. Conventional-island construction could start in 2028 with the fusion island from 2030, targeting grid power in the mid-2030s.
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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 |
| Fuel | D-T |
| Purpose | Commercial plant |
| Target output (MWe) | 400 |
| Offtakers | Tennessee Valley Authority (letter of intent) |
| Site | TVA Bull Run site; TVA letter of intent Sept 2025, final TVA board decision pending |
| Private funding raised | USD 400m (as of 2026-10-06) |
| Regulation | Byproduct-material licence application filed Jan 2026; Tennessee issued a fusion licence for Project Infinity on 2026-08-31. |
Notes
private funding raised is the company-wide 'more than $400 million' (Reuters/PitchBook) after the Oct 2026 Series B. Grid target stated as 'mid-2030s' (no specific year). TVA's commitment is an LOI, not a PPA.
Timeline
- 2025-09 — TVA issued a letter of intent covering construction of one or more Infinity Two plants at Bull Run. (source)
- 2026-01-30 — Type One filed an initial licence application for the Infinity Two plant (then 350 MWe) at Bull Run. (source)
- 2026-08-31 — Tennessee issued the first US fusion-specific byproduct material license for Project Infinity. (source)
- 2026-10-06 — Type One closed a $200 million Series B; planned Infinity Two capacity was cited at 400 MW, up from 350 MW. (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 Two
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
- Fusion firm Type One in $200 million Siemens Energy-backed raise (Reuters) — Reuters via KSL, checked 2026-10-11