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Hermes nuclear power plant 1

Under construction United States Small modular
Gross capacity
50MW

Hermes nuclear power plant 1 is a small modular reactor unit at Hermes nuclear power plant in United States rated at 50 MW gross. It is under construction. Commercial operation began 1 Jan 2027.

Specification
Reactor type small modular reactor
ModelKP-FHR
Size classSmall modular
Coolantnot disclosed
Moderatornot disclosed
Gross capacity50MW
Net capacity (reference)not disclosed
Net capacity (design)not disclosed
Thermal outputnot disclosed
Typical enrichmentnot disclosed
Ownership & location
SiteHermes nuclear power plant
Unit1
CountryUnited States
OwnerKairos Power100%
Coordinates 35.9378, -84.4033approximate
Fuel chain for this unit
Fuel form
not established for this unit's type
Enrichment
not established
Upstream

Enriched fuel means this unit sits downstream of five conversion plants and four enrichment operators holding 88% of world capacity between the top three.

RosatomUrencoCNNCOrano
Conversion
CamecoCNNCConverDynOranoRosatom
Fabricator capability is recorded against reactor type and model line, not against named units — utilities do not publish fuel contracts. See the fuel chain.

Timeline

  1. 1 Jan 2027Commercial operation

Other units at Hermes nuclear power plant

UnitStatusGross MW
Hermes nuclear power plant 2a Pre-construction 25
Hermes nuclear power plant 2b Pre-construction 25

Other KP-FHR units

5 units worldwide share this model designation.

UnitCountryStatusGross MW
Hermes nuclear power plant 2a United States Pre-construction 25
Hermes nuclear power plant 2b United States Pre-construction 25
Kairos Power Texas A&M nuclear power plant 1 United States Announced 75
Kairos Power Texas A&M nuclear power plant 2 United States Announced 75

Sources