Kairos breaks ground on Hermes 2.

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    "url": "https://www.power-technology.com/news/kairos-breaks-ground-on-hermes-2",
    "title": "Kairos breaks ground on Hermes 2.",
    "excerpt": "Kairos breaks ground on Hermes 2.\n\nConstruction of Hermes 2 is part of a wider agreement between Kairos Power and Google to help supply low-carbon electricity for data centres.\n\nApril 23, 2026\n\nUS-based Kairos Power has broken ground on the Hermes 2 Demonstration Plant in Oak Ridge, Tennessee. Hermes 2 is Kairos Power's first deployment under its deal with Google to develop an advanced reactor fleet. The plant will supply up to 50MW-electrical to the Tennessee Valley Authority (TVA) grid, helping to decarbonise Google data centres in Tennessee and Alabama.\n\nKairos Power is developing Fluoride Salt-Cooled High-Temperature Reactors (KP-FHR) technology, following an iterative approach, moving from non-nuclear engineering test units (ETUs) to demonstration plants and finally a commercial fleet. First concrete for Hermes 1, a 35MW-thermal (MWt) non-power reactor designed to demonstrate nuclear heat production, was poured in May 2025.\n\nThe US Nuclear Regulatory Commission (NRC) issued a construction permit for the Hermes Low-Power Demonstration Reactor (Hermes 1) in 2023 - the first non-water-cooled reactor design to be approved for construction in the US in more than 50 years. A construction permit was issued by NRC in November 2024 for Hermes 2, a two-unit plant (35MWt each). Kairos plans to deploy a larger-scale version of the technology (188MWt) starting in 2030.\n\nMeanwhile, the...",
    "product": "Fluoride Salt-Cooled High-Temperature Reactors technology",
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    "article_sentence": "Kairos Power is developing Fluoride Salt-Cooled High-Temperature Reactors (KP-FHR) technology, following an iterative approach, moving from non-nuclear engineering test units (ETUs) to demonstration plants and finally a commercial fleet."
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