Kairos Power will work with ORNL, INL, the Electric Power Research Institute (EPRI) and the Materion Corp. to deliver Hermes—a scaled-down version of the company’s KP-FHR commercial reactor. The reactor uses a TRISO fuel pebble bed design with a liquid fluoride salt coolant to efficiently transfer heat from the fuel to produce power. The 140-megawatt electric commercial design will operate at lower temperatures than most advanced reactors and offers high availability with online refueling. Hermes is expected to be operational in 2026 and will be demonstrated in Oak Ridge, Tennessee.