Document: NRC Regulatory Guide
Document ID: 1bd47be4-b79c-4108-b744-3e7d400266e8
Document Type: regulatory_guide
Title: ASME Code Cases Approved for Use Without Conditions (Rev. 0)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2509/ML25091A013.pdf
Revision Date: 2025-09
Chapter: 
Section ID: RG-1.262
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CFR Title: 

Content:
U.S. NUCLEAR REGULATORY COMMISSION REGULATORY GUIDE 1.262, REVISION 0 Issue Date: July 2025 Technical Lead: Michael Benson Written suggestions regarding this guide may be submitted through the NRC’s public website in the NRC Library at https://www.nrc.gov/reading-rm/doc-collections/reg-guides/index.html, under Document Collections, in Regulatory Guides, at https://www.nrc.gov/reading-rm/doc-collections/reg-guides/contactus.html, and will be considered in future updates and enhancements to the “Regulatory Guide” series. During the development process of new guides, suggestions should be submitted within the comment period for immediate consideration. Suggestions received outside of the comment period will be considered if practical to do so or may be considered for future updates. Electronic copies of this RG, previous versions of RGs, and other recently issued guides are also available through the NRC’s public website in the NRC Library at https://www.nrc.gov/reading-rm/doc-collections/reg-guides/index.html under Document Collections, in Regulatory Guides. This RG is also available through the NRC’s Agencywide Documents Access and Management System (ADAMS) at https://www.nrc.gov/reading-rm/adams.html, under ADAMS Accession Number (No.) ML25091A013. ASME CODE CASES APPROVED FOR USE WITHOUT CONDITIONS A. INTRODUCTION Purpose This regulatory guide (RG) lists the American Society of Mechanical Engineers (ASME) code cases that the U.S. Nuclear Regulatory Commission (NRC) has determined to be acceptable for use without conditions. Applicability This RG applies to reactor licensees and applicants subject to Title 10 of the Code of Federal Regulations (10 CFR) 50.55a, “Codes and standards.” Applicable Regulations • 10 CFR Part 50, “Domestic Licensing of Production and Utilization Facilities” (Ref. 1): o General Design Criterion (GDC) 1, “Quality Standards and Records,” of Appendix A, “General Design Criteria for Nuclear Power Plants,” to 10 CFR