US microreactor secures first-of-its-kind DOE approval for full-power operations

Started by Marlin, Oct 30, 2026, 11:15

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US clears safety hurdle for extended nuclear microreactor testing

Radiant has received Department of Energy approval for the Documented Safety Analysis of its Kaleidos microreactor at Idaho National Laboratory. The decision allows the company to pursue a five-phase testing campaign targeting 60 days of full-power operation. The results will provide critical operational data for the 1-megawatt transportable design ahead of planned commercial deliveries to military installations.

QuoteRadiant's Kaleidos microreactor clears a DOE safety hurdle ahead of 60 days of full-power testing and a 150-hour run.

A US nuclear microreactor has cleared a key safety hurdle ahead of a planned test campaign targeting 60 effective full-power days of operation and at least 150 continuous hours without operator intervention. California-based nuclear technology developer Radiant announced that the US Department of Energy (DOE) has approved the Documented Safety Analysis (DSA) for its Kaleidos microreactor. The approval brings the reactor closer to full-power testing at Idaho National Laboratory (INL), where...

Read the full article at Interesting Engineering:
https://interestingengineering.com/energy/slug-radiant-kaleidos-microreactor-doe-safety-approval