A company working to mass produce portable nuclear microreactors said its has accepted its selection by the U.S. Dept. of Energy (DOE) to receive high-assay low-enriched uranium (HALEU) fuel for the first test of Kaleidos, the group’s reactor design.
California-based Radiant, which has specifically said its microreactor could replace diesel-fueled generators to help power remote communities, military operations, and also areas needing power after natural disaster, on April 10 said its “acceptance of the DOE’s conditional fuel allocation further cements the company’s leadership role in the emerging field of portable nuclear energy and underscores the federal government’s growing investment in nuclear innovation as a key pillar of national energy strategy.”
This is a rendering of Radiant’s Kaleidos microreactor. The high-temperature gas-cooled reactor is designed to produce 1.2 MW of electricity and operate for five or more years before refueling. Source: Radiant
“We are honored to be selected by the Department of Energy for this fuel allocation,” said Doug Bernauer, CEO and founder of Radiant. “The DOE’s commitment today will revitalize the American nuclear sector because ensuring that fuel is accessible to innovative companies means that the schedule for delivering value back to our customers and our country doesn’t slip a single unnecessary day. “Fueling the prototype of the first mass producible reactor design next year and operating it will mark a defining moment for Radiant and for the future of American energy.”
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The DOE’s allocation of HALEU fuel to Radiant is part of Energy Secretary Chris Wright’s broader initiative to prioritize innovation in next-generation nuclear technologies. Radiant officials have said the company’s Kaleidos reactor “is designed for rapid deployment and high operational safety [and] is a pioneering solution aimed at transforming the way energy is delivered in challenging environments.”
Radiant is currently targeting its test of the Kaleidos demonstration unit at the Idaho National Laboratory DOME facility in 2026.
—Darrell Proctor is a senior editor for POWER.