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Proposed RuleOpen for Comment2026-085502026-05-01

Licensing Requirements for Microreactors and Other Reactors With Comparable Risk Profiles

Nuclear Regulatory Commission

Abstract

The U.S. Nuclear Regulatory Commission (NRC) is proposing to amend its regulations to establish a risk-informed and performance- based regulatory framework for rapid licensing of new microreactors and other reactors with comparable risk profiles and for high-volume deployment of these reactors. The proposed rule would provide a flexible set of licensing pathways, reduce regulatory burden, and ensure that safety and security requirements remain commensurate with the potential hazards posed by these facilities.

Action & Dates

Action
Proposed rule; guidance; and request for comment.
Dates
Comments must be submitted electronically using https:// www.regulations.gov by 11:59 p.m. eastern time on June 15, 2026.

CFR References

Topics

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Public Comment

Comments Close
2026-06-15 — Open for comment

Corrections

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Document Excerpt

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Nuclear Regulatory Commission 10 CFR Parts 1, 2, 10, 11, 19, 20, 21, 25, 26, 30, 40, 50, 51, 57, 70, 72, 73, 74, 75, 95, 140, 150 [NRC-2025-0379] RIN 3150-AL36 ( printed page 23628) AGENCY: Nuclear Regulatory Commission. ACTION: Proposed rule; guidance; and request for comment. SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is proposing to amend its regulations to establish a risk-informed and performance-based regulatory framework for rapid licensing of new microreactors and other reactors with comparable risk profiles and for high-volume deployment of these reactors. The proposed rule would provide a flexible set of licensing pathways, reduce regulatory burden, and ensure that safety and security requirements remain commensurate with the potential hazards posed by these facilities. DATES: Comments must be submitted electronically using https://www.regulations.gov by 11:59 p.m. eastern time on June 15, 2026. ADDRESSES: Submit your comments, identified by Docket ID NRC-2025-0379, at https://www.regulations.gov . If your material cannot be submitted using https://www.regulations.gov , call or email the individuals listed in the FOR FURTHER INFORMATION CONTACT section of this document for alternate instructions. Do not include any personally identifiable information (such as name, address, or other contact information) or confidential business information that you do not want publicly disclosed. All comments are public records; they are publicly displayed exactly as rece

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Full Document

Citation: 91 FR 23628