Latest milestone
NRC issued construction permit CPAR-1; DOE later reported groundbreaking for the nuclear island.
2026-04 · NRC application record
Open primary source ↗← All deployments
Natrium · Kemmerer Unit 1
A commercial-scale advanced reactor demonstration replacing capacity near a retiring coal plant.
Lead company · TerraPower →
Program · ARDP demonstration
Construction permittedHigh confidence
Deployment stage6 / 8Physical
Deployment trajectory
1Interest
2Preliminary
3Development
4Contractual
5Ready
6Physical
7Operational
8Replication
Next milestone
Submit and secure the separate NRC operating license before fuel loading or operation.
- Responsible
- TerraPower and NRC
- Key blocker
- Operating license, HALEU fuel availability, first-of-a-kind delivery
GenerationGen IV
ScaleLarge reactor
Reactor familySFR
RoleDemonstration power
Capacity345 MWe + storage
Reporting basisVerified