What the Army's $2bn nuclear bet actually buys

The Army's largest microreactor award, announced on August 26th, went to a company that has never sold a working reactor. Radiant Industries, an El Segundo maker of portable one-megawatt nuclear generators, took up to $750m of the $2.2bn the service committed under Project Janus, its plan to put reactors on five bases and cut critical missions loose from a civilian grid it no longer trusts. The number was the headline: the biggest of the five, larger than the awards to Westinghouse or General Atomics, incumbents with decades of nuclear pedigree. The structure underneath it was the story. Radiant will own and operate the reactors rather than sell them, the Army pays only as technical milestones clear, and each installation stays tied to the commercial grid rather than replacing it.

Doug Bernauer, Radiant's founder, spent twelve years at SpaceX before leaving in 2019, around the time the Pentagon began soliciting container-sized military reactors, and started Radiant the following year. Part of that tenure had gone into modeling how to power a Mars colony, work that pointed him to fission; the reactor that could run a settlement could run a forward base, or a data center. Radiant's pitch has always assumed the government would be its first serious customer, the way the government was SpaceX's first serious customer. Bernauer is running a playbook he watched work, from roughly the same zip code.