{"aiVersion":"1","content":{"id":"cmtc8z7sf0004ndu1k9dsq1f3","slug":"janus-the-army-s-plan-to-put-microreactors-on-base-20260828","title":"Janus: The Army's Plan to Put Microreactors on Bases","level":"HARD","publishedAt":"2026-08-28T01:02:51.720Z"},"topic":{"slug":"janus-the-army-s-plan-to-put-microreactors-on-base-20260828","category":"science"},"article":{"paragraphs":["The U.S. Army has moved forward with a major step in military energy resilience by awarding up to $2.2 billion in milestone-based agreements to five firms to deliver nuclear microreactors to domestic bases. Named the Janus Program, the effort pairs Antares, BWXT Advanced Technologies, General Atomics Electromagnetic Systems, Radiant Industries, and Westinghouse Government Services with Fort Bragg, Fort Campbell, Fort Hood, Fort Benning, and Fort Drum respectively. Prototype units will be contractor-owned and contractor-operated, and funding will be paid only after companies meet defined technical milestones across fiscal years 2027–2031.","Advanced tests have already been conducted; Antares completed a zero-power criticality test at Idaho National Laboratory on June 4, 2026, a milestone that underpins the program’s technical confidence. The Army intends to regulate these installation reactors through its Army Reactor Regulatory Office rather than the Nuclear Regulatory Commission, so designs will be reviewed under a military permitting framework even while the service seeks alignment with Energy Department safety practices. Although developers expect reactors to generate between one and twenty megawatts each, limited national production of high-assay low-enriched uranium (HALEU) is acknowledged as a supply constraint that could affect scheduling.","Leaders have set an operational target of September 30, 2028, for the first installation-operating reactor, and they describe Janus as a pathway to scale advanced reactors beyond military use. If the contractors and regulators meet the program’s milestones on schedule, the United States could see a rapid increase in factory-built, transportable nuclear power systems that are intended to bolster training, operations and base resilience in contested or remote environments."],"wordCount":258,"readTime":2},"vocabulary":[{"word":"criticality","example":"Antares reached criticality during lab tests.","phonetic":"/ˌkrɪtɪˈsɪəti/","definition":"The point when a nuclear chain reaction becomes self-sustaining."},{"word":"contractor-owned","example":"The prototype will be contractor-owned and contractor-operated.","phonetic":"/kənˈtræk.tər oʊnd/","definition":"Owned and operated by a private company rather than the government."},{"word":"permitting","example":"Designs will be reviewed under a military permitting framework.","phonetic":"/pəˈmɪtɪŋ/","definition":"The process of getting official permission to build or operate something."},{"word":"baseload","example":"Microreactors aim to provide baseload power to bases.","phonetic":"/ˈbeɪsˌloʊd/","definition":"A steady amount of electrical power supplied over time."},{"word":"HALEU","example":"HALEU production limits could affect the program schedule.","phonetic":"/ˈheɪluː/","definition":"High-assay low-enriched uranium, a type of reactor fuel."}],"quiz":[{"answer":"Antares","question":"Which company completed a zero-power criticality test on June 4, 2026?"},{"answer":"Army Reactor Regulatory Office","question":"Which office intends to regulate these installation reactors?"},{"answer":"between one and twenty megawatts each","question":"How many megawatts will the reactors supply?"}],"discussion":[{"question":"Do you worry about living near large infrastructure projects? What concerns come to mind?"},{"question":"Have you ever relied on a backup power source for work or study? What was it like?"},{"question":"What do you think about factory-built energy systems that can be moved to different sites?"},{"question":"Would you like to learn more about how nuclear power works? Why or why not?"},{"question":"How would a stable power supply change life in a remote area near you?"}]}