Document: NRC Regulatory Guide
Document ID: 82659041-98b0-4721-b25d-c4fb2ea394d0
Document Type: regulatory_guide
Title: An Approach for Using Probabilistic Risk Assessment in Risk-Informed Decisions on Plant-Specific Changes to the Licensing Basis (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1635/ML16358A153.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.174
CFR Part: 
CFR Title: 

Content:
K-INFORMED DECISIONS ON PLANT- SPECIFIC CHANGES TO THE LICENSING BASIS A. INTRODUCTION Purpose This regulatory guide (RG) describes an approach that the staff of the U.S. Nuclear Regulatory Commission (NRC) considers acceptable for applications for licensing basis changes by considering engineering issues and applying risk insights. It provides general guidance concerning analysis of the risk associated with the proposed changes in plant design and operation. Applicability This RG applies to light-water reactor (LWR) licensees subject to Title 10 of the Code of Federal Regulations (10 CFR), Part 50, “Domestic Licensing of Production and Utilization Facilities” (Ref. 1), and 10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants,” (Ref. 2). Applicable Regulations • 10 CFR 50.90, “Application for amendment of license, construction permit, or early site permit” (Ref. 3), requires that, whenever a holder of a license, including a construction permit and operating license under this part, and an early site permit, combined license, and manufacturing license under 10 CFR Part 52, desires to amend the license or permit, an application for a license amendment must be filed with the Commission fully describing the changes desired. • 10 CFR 50.92, “Issuance of amendment” (Ref. 4), provides the general considerations which governs the issuance of initial licenses, construction permits, or early site permits to the extent applicable and appropriate. DG-1285, Page 2 Related Guidance • NRC, NUREG-0800, “Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants: LWR Edition” (Ref. 5), provides guidance to the NRC staff in performing safety reviews of construction permit or operating license applications (including requests for amendments) under 10 CFR Part 50 and early site permit, design certification, combined license, standard design approval, or manufacturing license applications under 10 CFR