Document: NRC Regulatory Guide
Document ID: 9d7f782d-ef28-456f-9c51-78f7c38748f7
Document Type: regulatory_guide
Title: Guidance and Examples for Identifying 10 CFR 50.2 Design Bases
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1710/ML17103A206.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.186
CFR Part: 
CFR Title: 

Content:
MEMORANDUM TO: FROM: SUBJECT: UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 8, 2017 Brian E. Thomas, Director Division of Engineering Office of Nuclear Regulatory Research / Mary Jane Ross-Lee, Actin . r.191} 1 J/l~ Division of Operating · ~ Office of Nuclear React r R lation Y020170023 - RESULTS OF PERIODIC REVIEW OF REGULATORY GUIDE 1.186 (CAC NO. TM3065) This memorandum documents the U.S. Nuclear Regulatory Commission (NRC) periodic review of Regulatory Guide (RG) 1.186, "Guidance and Examples for Identifying 10 CFR 50.2 Design Bases." As discussed in Management Directive 6.6, "Regulatory Guides," the NRC staff reviews regulatory guides approximately every 5 years to ensure that the regulatory guides continue to provide useful guidance. Documentation of the NRC staff's review is enclosed. Based on the results of the periodic review, the staff concludes that no changes to RG 1.186 are warranted. The staff did not identify any technical or regulatory issues in the review. Enclosure: Periodic Review of RG 1.86 CONTACT: Eva Brown, NRR/DORL 301-415-2315 Regulatory Guide Periodic Review Regulatory Guide Number: 1.186 Title: Guidance and Examples for Identifying 10 CFR 50.2 Design Bases Office/division/branch: NRR/DORL/LSPB Eva Brown Technical Lead: Staff Action Decided: Reviewed with no issues identified 1. What are the known technical or regulatory issues with the current version of the Regulatory Guide (RG)? Regulatory Guide (RG) 1.186, "Guidance and Examples for Identifying 10 CFR 50.2 Design Bases," published in December 2000. The RG provides a better understanding of what constitutes design bases information. The RG endorses Appendix B to Nuclear Energy Institute (NEI) 97-04, with exceptions, which focuses on guidance and examples that are acceptable to the staff for providing a clearer understanding of what constitutes design bases information. No technical or regulatory issues were identified. 2. What is the impact on internal and