NRC proposes its most comprehensive reactor-licensing modernization in decades
The NRC proposed a sweeping rule updating licensing, safety oversight and siting across a plant's whole lifecycle — risk-informed alternatives, performance-based emergency planning for all reactor types, longer license renewals. 45-day comment period.
The US Nuclear Regulatory Commission proposed a sweeping package modernizing reactor licensing, safety oversight and siting — spanning a plant's lifecycle from design approval through decommissioning. It would let applicants use risk-informed approaches as alternatives to traditional requirements, extend performance-based emergency planning to all reactor types with flexible planning zones, lengthen license-renewal terms, and update siting criteria for a broader range of technologies. Comments run 45 days from Federal Register publication (Docket NRC-2025-0975).
Why it matters
Licensing time is the binding constraint on SMR economics — more than steel or fuel. Bundling decades of piecemeal modernization into one rule is the regulator matching the pace the June fuel-licensing proposal hinted at. Flexible emergency-planning zones matter most: they decide whether small reactors can site near the loads (data centers, industry) that make their business case.
What to watch
The comment docket for utility and developer objections, and how much of the proposal survives to a final rule.
Who's involved
Aurora microreactor; pursuing a build-own-operate power model.
Only SMR design certified by the US NRC; light-water modules.
Reader response
Reactions and comments are reader opinion — unverified, and never part of the newsroom's fact record.
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