X-energy and its helium-cooled nuclear reactors

X-energy is developing small modular reactors (SMRs) designed to provide high-temperature heat for heavy industries like concrete and steel production, which currently rely heavily on fossil fuels. Unlike traditional water-cooled reactors, the Xe-100 uses helium gas as a coolant, allowing it to reach the extreme temperatures necessary for industrial processes. The reactor utilizes TRISO fuel pebbles, which are highly resistant to corrosion and melting, enhancing safety. Beyond industrial heating, the Xe-100 can generate electricity for data centers, potentially meeting the rising power demands of AI infrastructure. While the technology offers a path to decarbonizing hard-to-abate sectors, X-energy faces significant challenges, including unproven economic viability for SMRs and the historical difficulty of maintaining continuous operation for helium-cooled systems. Despite these hurdles, the company aims to provide a flexible, 24/7 power solution that could significantly reduce global greenhouse gas emissions if successfully deployed at scale.