Nuclear Regulatory Commission
The U.S. Nuclear Regulatory Commission (NRC) is issuing new Regulatory Guide (RG) 1.261, "Guidance for Technology-Inclusive Risk- Informed Change Evaluation." This RG describes an approach that the NRC staff finds acceptable for using a technology-inclusive risk- informed change evaluation process for changes to a facility described in final safety analysis reports (as updated). Subject to the clarifications in Section C of the RG, this RG endorses the methodology described in Nuclear Energy Institute (NEI) 22-05, Revision 0, "Technology Inclusive Risk Informed Change Evaluation (TIRICE), Guidance for the Evaluation of Changes to Facilities Utilizing NEI 18- 04 and NEI 21-07," issued January 2024.
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 [NRC-2025-0148] AGENCY: Nuclear Regulatory Commission. ACTION: Final guide; issuance. SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing new Regulatory Guide (RG) 1.261, “Guidance for Technology-Inclusive Risk-Informed Change Evaluation.” This RG describes an approach that the NRC staff finds acceptable for using a technology-inclusive risk-informed change evaluation process for changes to a facility described in final safety analysis reports (as updated). Subject to the clarifications in Section C of the RG, this RG endorses the methodology described in Nuclear Energy Institute (NEI) 22-05, Revision 0, “Technology Inclusive Risk Informed Change Evaluation (TIRICE), Guidance for the Evaluation of Changes to Facilities Utilizing NEI 18-04 and NEI 21-07,” issued January 2024. DATES: RG 1.261 is available on June 11, 2026. ( printed page 35583) ADDRESSES: Please refer to Docket ID NRC-2025-0148 when contacting the NRC about the availability of information regarding this document. You may obtain publicly available information related to this document using any of the following methods: Federal Rulemaking Website: Go to https://www.regulations.gov and search for Docket ID NRC-2025-0148. Address questions about Docket IDs in Regulations.gov to Bridget Curran; telephone: 301-415-1003; email: Bridget.Curran@nrc.gov . For technical questions, contact the individuals listed in the FOR FURTHER INFORMATION CONTACT sectio…
Other Federal Register documents from the same docket.
Citation: 91 FR 35582
