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X (XE), known as X-Energy, Inc., is a nuclear technology company headquartered in Rockville, Maryland. Founded in 2009, it designs and develops nuclear reactor technology and manufactures nuclear fuels, positioning itself within the advanced reactor segment of the energy and industrial equipment market.
The company's central product is the Xe-100 reactor, a design intended to generate about 80 megawatts of electric power, or roughly 200 megawatts of thermal output when measured as heat. This makes the reactor suitable both for producing electricity and for supplying industrial process heat. Alongside the reactor itself, X-Energy develops TRISO-X, a specialized fuel made for use in its reactors. TRISO fuel is built around small coated particles designed to contain the nuclear material, and it is a core part of how the company's reactor system is meant to operate.
By developing both the reactor and the fuel that powers it, X-Energy aims to offer an integrated approach to advanced nuclear power. Its strategy combines reactor design with in-house fuel manufacturing, which links the performance of the Xe-100 to the TRISO-X fuel produced by the same company. The business is centered on bringing this technology toward deployment for power generation and industrial heat applications. As an advanced reactor developer, X-Energy, Inc. operates in a field focused on next-generation nuclear systems rather than conventional large-scale reactors.