TerraPower
Natrium fast reactor with built-in energy storage
Ranked #3 in Best Small Modular Reactor Companies.
TerraPower, based in Bellevue, Washington and founded by Bill Gates, is building its first Natrium plant, a 345-megawatt sodium-cooled fast reactor with molten salt energy storage, in Kemmerer, Wyoming. The NRC approved its construction permit in March 2026.
At a glance
| Price from | Custom |
| Best for | Utilities that want nuclear power with built-in storage |
From TerraPower's own website.
What stands out
- Construction permit in hand
- Storage lets output follow demand
Worth knowing
- Relies on specialist HALEU fuel
- First plant still years from operation
How it ranks
TerraPower is ranked 3rd of 10 in Best Small Modular Reactor Companies (Lister Score 94.8).
#3 in Best Small Modular Reactor Companies · Lister Score 94.8
The NRC approved the Kemmerer Unit 1 construction permit in March 2026, its first for a commercial non-light-water power reactor..
| Rank | Best Small Modular Reactor Companies | Score |
|---|---|---|
| 1 | GE Vernova Hitachi Nuclear Energy | 97.2 |
| 2 | NuScale Power | 95.9 |
| 3 | TerraPower | 94.8 |
| 4 | Rolls-Royce SMR | 93.6 |
| 5 | Kairos Power | 92.3 |
| 6 | X-energy | 91.0 |
| 7 | Holtec International | 89.7 |
| 8 | Oklo | 88.3 |
| 9 | Westinghouse | 86.9 |
| 10 | Aalo Atomics | 85.4 |
Frequently asked questions
How does TerraPower rank on Lister?
TerraPower is ranked 3rd of 10 in Best Small Modular Reactor Companies (Lister Score 94.8).
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