Hermes test reactor
also Hermes 1, Hermes Low-Power Demonstration Reactor
Kairos Power's 35 MWt non-power test reactor in Oak Ridge, Tennessee, cooled by molten fluoride salt with solid TRISO fuel. NRC construction permit CPTR-6 (2023); safety-related construction began May 2025. It will not generate electricity.
- Operator
- Kairos Power
- Type
- Research reactor
- Approach
- FHR
- Fuel
- TRISO, HALEU
- Country
- US
- Status
- Under construction
Design values
What the machine was built to do, as published. Not results, and never ranked.
| Parameter | Value | Unit | Status | Source |
|---|---|---|---|---|
| Thermal capacity (rated) medium confidence | 35 MW | MW | planned | Kairos Power (Wikipedia) aggregator |