| name | city | nation | reactor size (MWe) |
reactor type | gee-whiz |
|---|---|---|---|---|---|
| Oklo | Sunnyvale, CA | USA | 2 | SFR * | heat pipes |
| Dunedin Energy Systems | ? | Canada | 6 | LWR | cermet fuel |
| Gen4 Energy | Denver, CO | USA | 25 | LFR * | |
| Seaborg | Copenhagen | DK | 25 | MSR | |
| StarCore Nuclear | Montreal, QC | Canada | 30 | HTGR | |
| NuScale Power (Fluor) | Portland, OR | USA | 50 | LWR | |
| X-energy | Greenbelt, MD | USA | 50 | HTGR | |
| Kairos Power | Oakland, CA | USA | 100 | FHR | natgas |
| Moltex Energy | London | UK | 150 | MSR * | fuel tubes |
| Terrestrial Energy | Oakville, ON | Canada | 190 | MSR | |
| Flibe Energy | Huntsville, AL | USA | 250 | MSR | thorium |
| Martingale/ThorCon | Tavernier, FL | USA | 250 | MSR | shipyard assembly |
| Transatomic Power | Cambridge, MA | USA | 550 | MSR | dual-zone core |
| TerraPower | Bellevue, WA | USA | 600 | SFR * | breed-and-burn |
| Elysium Industries | Vancouver, BC | Canada | 1000 | MSR * |
* fast spectrum