SMRTR Science & EngineeringSep 9, 2025Interesting Engineering

US nuclear firm gets funding to bury mini reactors a mile underground, saving 80%

SMRTR summary

Deep Fission secured $30 million through an alternative public offering to develop underground nuclear reactors. The company's innovative 15-megawatt reactors will be placed in mile-deep boreholes, reducing costs to 5-7 cents per kilowatt-hour and providing natural shielding. With Department of Energy backing and an agreement to build two gigawatts for data center developer Endeavor, Deep Fission aims to complete its pilot reactor by 2026.

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