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Radiant Nuclear
American nuclear technology company
Radiant Nuclear
Radiant Industries Inc., commonly known as Radiant Nuclear, is an American nuclear energy company based in El Segundo, California, that designs and markets small modular reactors. The company is developing a 1 MWe portable microreactor called Kaleidos. The reactor is intended to replace diesel generators in hospitals, remote areas, or military bases. The company's Kaleidos microreactor is a high-temperature, gas-cooled design using helium coolant and TRISO fuel. The reactor is designed to fit in a single shipping container and be transportable by truck, cargo aircraft, or ship. To increase flexibility, Radiant's reactors use air cooling instead of water and are designed to avoid significant on-site construction. Each reactor is designed to run for five years between refueling, after which it is returned to the factory to be refurbished and redeployed. As of 2026, Radiant has raised over $575 million in private funding. Radiant was selected by the US Department of Energy in 2025 to build...
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