DOE approves full-power testing of Radiant's Kaleidos microreactor

The US Department of Energy has approved the safety analysis for full-power operation of a commercial nuclear microreactor for the first time, clearing Radiant's Kaleidos for testing at Idaho National Laboratory. The campaign includes at least 150 hours of continuous full-power operation, with first deliveries to the US military planned for 2028.

• Kaleidos is a 1 MW transportable reactor providing up to five years of power before refueling
• The US Army and DIU signed a contract worth up to $750 million for 15 reactors under the Janus Program
• Radiant plans to deliver 15 reactors to the US military by 2030
• First commercial units are slated for Buckley Space Force Base and Fort Benning in 2028