Kairos Power, headquartered in Alameda, California, is developing the KP-FHR — a fluoride salt-cooled high temperature reactor that uses TRISO fuel pebbles suspended in liquid fluoride salt. The design operates at high temperature with low pressure, enabling inherent safety without active cooling systems. Kairos is building the Hermes test reactor in Oak Ridge, Tennessee — the first non-light water reactor construction permit application accepted by the NRC since the 1970s, and currently under active safety review. Google signed a power purchase agreement with Kairos in 2023, targeting commercial deployment from 2030. The company is a recipient of the DOE Advanced Reactor Demonstration Program and is considered one of the most technically credible next-generation reactor developers in the US.