Policy and licensing / United States (federal)
Proposed licensing requirements for microreactors and comparable reactors
NRC proposal published 1 May 2026; the comment period closed on 15 June 2026. It is not in effect.
- Category
- Bills, proposed rules and consultations
- Status
- Proposed — not in effect
- Instrument
- proposed rule · 91 FR 23628 (proposed rule, 1 May 2026); docket NRC-2025-0379
- Issued by
- U.S. Nuclear Regulatory Commission
- Jurisdiction
- United States (federal)
- Affects
- NRC licensing
- In effect from
- —
- Expiry or completion
- None recorded
- Operative text
- Federal Register 91 FR 23628 (1 May 2026): Licensing Requirements for Microreactors and Other Reactors With Comparable Risk Profiles (proposed rule) (Proposed rule (as corrected 15 May 2026))
- Last checked · next review
- 2026-10-03 · 2026-11-02
Legal and geographic scope
Proposed NRC regulation for a risk-informed, performance-based framework for rapid licensing and high-volume deployment of microreactors and other reactors with comparable risk profiles.
Not approved or still pending
Not adopted: no final rule had been published by 3 October 2026.
Dated lifecycle
- 2026-05-01 · Proposed (Federal Register 91 FR 23628 (1 May 2026): Licensing Requirements for Microreactors and Other Reactors With Comparable Risk Profiles (proposed rule))
- 2026-06-15 · Comment period closed (Federal Register 91 FR 23628 (1 May 2026): Licensing Requirements for Microreactors and Other Reactors With Comparable Risk Profiles (proposed rule))
Related instruments
Projects or designs named by the source
- None. Location in this jurisdiction does not make a project eligible for, or approved under, this measure.
Sources
- Federal Register 91 FR 23628 (1 May 2026): Licensing Requirements for Microreactors and Other Reactors With Comparable Risk Profiles (proposed rule) (regulator_primary, accessed 2026-10-03)