Antares–BWXT TRISO fuel deal

Open · 3 updates · since Sep 18, 2026 · updated Oct 29, 2026 Energy nuclear fuel-cycle centrus antares bwxt Arc · Advanced nuclear online

Where it stands: Antares has a multi-year agreement with BWX Technologies to fabricate advanced nuclear fuel, starting with an initial tonne of TRISO fuel for its microreactors, with volumes possibly rising as deployment needs grow. Antares also has initial DOE safety approval for its Mark-1 microreactor, though that is not a licence or full authorization. Next to watch: the remaining DOE review stages, fuel delivery dates and any named deployment partners.

Latest

• 2026-10-29 (~8:17 AM ET, WNN — world-nuclear-news.org/articles): the Antares–BWXT agreement now carries named fuel specifics — an initial tonne of TRISO fuel for Antares's microreactors, with volumes that could increase as deployment requirements evolve to support the advanced reactor program. Development: fleshes out the Oct 27 multi-year BWXT fabrication arrangement (POWER) with the fuel type and first checkable quantity; still procurement-grade — no deliveries dated, no deployments or offtake named. Watch: delivery schedules, the remaining DOE safety-review stages for the Mark-1, named deployment partners.
• 2026-10-27 (~10:29 AM ET, POWER Magazine — powermag.com): Antares announced on Oct 27 a multi-year agreement with BWX Technologies for advanced nuclear fuel fabrication, plus initial DOE safety approval for its Mark-1 microreactor — both framed as key requirements for the planned transition from reactor testing to electricity production and military deployments. Development: the fuel-supply layer (Centrus prepaid HALEU contract, Sep 2026) gains a fabrication anchor at BWXT; the DOE step is an initial safety approval, not a licence or full authorization. Watch: remaining DOE review stages, delivery schedules, named deployment partners.
• 2026-09-18→21 Centrus signed multi-year prepaid HALEU contract with Antares (deliveries by end of decade — ledgered) and pitched "unobligated uranium" to microreactor developers. Framatome signed the first higher-enriched-fuel reload contract. Red Book: resources OK.