Designs / dsn-hermes
Hermes / KP-FHR
Fluoride-salt-cooled HTGR family. Hermes 1 is a non-power test reactor (~35 MWth); Hermes 2 is a power-producing demonstration (~50 MWe class).
- Class
- SMR
- Technology
- Fluoride-salt-cooled high-temperature reactor (FHR)
- Coolant
- molten_salt
- Spectrum
- thermal
- Developer / vendor(s)
- Kairos Power
- Module electrical
- thermal only (no MWe)
- Module thermal
- 35 MWth (nameplate_unspecified)
- Inclusion basis
- smr_by_regulator_classification
- Confidence
- high
- Last verified
- 2026-10-01
Tracked deployment projects
- Kairos Hermes 1 — Construction · United States
- Kairos Hermes 2 — Construction · United States