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The U.S. Navy has selected California-based Radiant to deploy a 1-megawatt microreactor at Naval Weapons Station Crane in Indiana, providing an off-grid power source capable of operating for up to five years before refueling.
The factory-built Kaleidos reactor is designed to supply continuous power without cooling water, extensive excavation, or major on-site construction. The enclosed system can travel by land, sea, or air and has an overall 20-year lifespan.
The selection puts the focus on maintaining power to critical shore infrastructure. Vice Adm. Brad Collins, Commander of Navy Installations Command, described naval bases as foundational warfighting platforms whose resilience is essential to supporting the fleet. He said the investment at Crane would help sustain the mission, improve infrastructure survivability, and strengthen base capabilities.
According to Radiant, the Department of Defense is working to remove barriers that previously hindered nuclear reactor deployment.
The Kaleidos reactor is undergoing testing at Idaho National Laboratory's DOME facility, where Radiant was granted exclusive access for a full year. The testing uses the same design and fuel intended for customer deployments to validate performance under actual operating conditions.
The source describes the program as the industry's only full-scale, full-power, long-duration test of that kind.
Radiant's selection for Crane also advances its efforts to supply portable nuclear power to military and commercial customers. The company is currently partnered with the U.S. Army, Navy, and Air Force.
Mike Dodd, Assistant Secretary of Defense for Critical Technologies, characterized the Crane selection as an acceleration of the military's nuclear power mission. He said the effort draws on commercial capabilities to bolster operational readiness and battlefield innovation.
At Crane, the planned reactor would serve as an entirely off-grid primary power source, reducing exposure to power disruptions and supporting continuity of base operations.
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