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Image Credits:Jean-Luc De Zorzi / Getty Images11:23 AM PDT · September 21, 2026
Kairos Power has picked engineering steadfast Samsung C&T to assistance physique its 50 megawatt objection reactor for Google, which the atomic startup is aiming to person completed by 2030.
As portion of the deal, Samsung C&T volition marque an equity concern successful Kairos and supply “in-kind” engineering services, the operation of which is worthy up to $100 million, Kairos Power said Monday. The equity concern volition marque up $70 cardinal of the total, a Kairos spokesperson told TechCrunch.
Samsung C&T has built oregon helped physique astir a twelve atomic reactors astir the globe.
Kairos is portion of a question of atomic startups that person benefited from the surge successful powerfulness request from AI information centers. Google archetypal signed a woody with the institution in autumn 2024, calling connected Kairos to physique atomic reactors susceptible of generating astir fractional a gigawatt of energy by 2035.
Currently, Kairos is gathering 2 reactors successful Oak Ridge, Tennessee. The first, Hermes 1, is simply a low-power demonstrator that volition assistance the institution refine its commercialized design. The second, Hermes 2, is Kairos’s archetypal commercial-scale reactor. Output from Hermes volition number arsenic the archetypal 50 megawatts of its woody with Google.
The startup received approval from the Nuclear Regulatory Commission to physique the reactors successful November 2024. It expects Hermes 2 to statesman operating successful 2030, successful enactment with its archetypal statement with Google.
Hermes 2 volition beryllium a fluoride salt-cooled high-temperature reactor, a plan that has been floated for years but ne'er built astatine commercialized scale. Fluoride salts person precocious boiling points, which volition assistance support unit levels low. That, successful turn, volition bounds the hazard of high-pressure blowouts successful lawsuit of immoderate parts failures.
Kairos is besides utilizing a comparatively caller signifier of atomic substance known arsenic TRISO, which encapsulates tiny seeds of uranium substance successful layers of ceramic and carbon, which are past loaded into billiard ball-sized spheres. The statement is intended to forestall meltdowns.
The startup has astir 5 years to get its archetypal powerfulness works up and running, which is an accelerated but manageable timeline successful the atomic industry. To fulfill the presumption of its woody with Google, Kairos volition request to determination adjacent faster connected consequent reactors, thing Samsung C&T mightiness beryllium capable to assistance with.
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Tim De Chant is simply a elder clime newsman astatine TechCrunch. He has written for a wide scope of publications, including Wired magazine, the Chicago Tribune, Ars Technica, The Wire China, and NOVA Next, wherever helium was founding editor.
De Chant is besides a lecturer successful MIT’s Graduate Program successful Science Writing, and helium was awarded a Knight Science Journalism Fellowship astatine MIT successful 2018, during which clip helium studied clime technologies and explored caller concern models for journalism. He received his PhD successful biology science, policy, and absorption from the University of California, Berkeley, and his BA grade successful biology studies, English, and biology from St. Olaf College.
You tin interaction oregon verify outreach from Tim by emailing tim.dechant@techcrunch.com.
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