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On June 4, Antares Nuclear completed a zero-power criticality test for its Mark-0 demonstrator, the first fueled test authorized under the Department of Energy's Reactor Pilot Program.

The U.S. Army's Janus Program aims for reliable nuclear power at a military installation by 2028, signaling growing momentum for mobile, always-on nuclear technology beyond the lab.

One company working on mobile nuclear power for bases, remote sites, and data centers is drawing early investor attention as this technology moves toward real-world deployment.