The US Army just moved nuclear microreactors from the lab to the field. On August 26, 2026, the Army named five companies to build Army nuclear microreactors under a new initiative called the Janus Program. The deal puts up to $2.2 billion in government funding behind five different reactor designs. It marks a real shift: these machines are leaving pilot sites and heading to live military bases.
Five Bases, Five Reactor Designs
The Army picked one company per base. Antares Nuclear will build at Fort Bragg, North Carolina. BWXT Advanced Technologies will build at Fort Campbell, Kentucky. General Atomics Electromagnetic Systems will build at Fort Hood, Texas. Radiant Industries will build at Fort Benning, Georgia. Westinghouse Government Services will build at Fort Drum, New York.
That spread matters. Instead of betting everything on one design, the Army is testing five approaches side by side, under real operating conditions, at the same time. Radiant’s Kaleidos microreactor already began testing at Idaho National Laboratory this month. General Atomics built a design that starts at 5 megawatts and scales up to 20 megawatts. That range lets each base size its power supply to actual demand instead of overbuilding.
Army Nuclear Microreactors Emphasize Safety
None of the five selected designs run on highly enriched, weapons-grade uranium. That single choice lowers the security burden at every site and cuts proliferation risk. The Army also confirmed it will not store nuclear waste on bases long-term. That addresses one of the biggest public concerns about putting reactors near people who live and work on post.
Radiant’s reactor also draws on the same TRISO fuel supply chain covered in our multi-year TRISO fuel supply deal. The fuel pipeline behind this rollout already has real contracts backing it, not just plans.
Why This Deployment Matters for Nuclear Power’s Future
Speed and cost drove this decision as much as safety did. Owen West, director of the Defense Innovation Unit, put it bluntly: “We need more power. We need it delivered faster and cheaper, and we need it to be more reliable.” Army Secretary Driscoll framed the contracts as a way to “deliver safe, reliable baseload power directly to our installations.”
The timeline backs that urgency up. The Army wants its first reactor running by September 2028, and the program funds work through fiscal year 2031. Officials project more than 20 reactors across Department of War installations once the program scales. That’s a genuine adoption curve, not a one-off demonstration.
Microreactors have spent years proving themselves in test loops and licensing reviews. This program pushes them into daily use, on real bases, powering real missions. Whichever designs deliver reliable electricity fastest and cheapest will likely shape how the broader US grid adopts this technology next. You can read the Army’s full announcement on the official Army.mil release.
Leave a Reply