MMR
USNC Micro Modular Reactor
MMR is Ultra Safe Nuclear's 5-15 MWe graphite-moderated microreactor using TRISO fuel in low-pressure coolant.
The MMR design achieves high burnup with helium coolant at 500°C and scalable output. USNC holds Canadian CNSC license approval and plans Chalk River demo by 2026. It emphasizes high-assay low-enriched uranium fuel.
Why it matters now
MMR progresses international SMR licensing, with Canadian deployment aiding US supply chain. HALEU and TRISO production ramps target 2026 pilots for remote and data center loads.
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