A startup fired up the first private non-light-water reactor in four decades (antaresindustries.com)
Antares hit initial criticality on its Mark-0 microreactor at Idaho National Laboratory, the first privately developed non-light-water reactor to go critical in the U.S. in over four decades. The fuel is BWXT-made TRISO pebbles; the roadmap reads criticality 2026, electricity 2027, 'power to the warfighter' 2028.
The thread caught the tell: the milestone is real engineering on schedule, but the end user is a military base, not the grid, which is why the commercial-power pitch rings hollow to some readers.
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