Document: NRC Regulatory Guide
Document ID: e0d690ec-277f-4fe2-b92f-7f95d0f589a7
Document Type: regulatory_guide
Title: Preparing Probabilistic Fracture Mechanics (Rev. 0)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2133/ML21334A158.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.245
CFR Part: 
CFR Title: 

Content:
e realization. • List changes to the code and the QA procedure used. SS-5 Category QV-2 or QV-3 code with limited independent variables (e.g., <5, determined on a case-by-case basis) Yes • See the submittal guidelines for SS-4. SS-6 Category QV-2 or QV-3 code with many independent variables (e.g., >5, determined on a case-by-case basis) Yes, model and input studies • See the submittal guidelines for SS-4. a Inputs must remain the same because sensitivity is dependent on the input distributions. RG 1.245 Revision 0, Page 26 D. IMPLEMENTATION The NRC staff may use this RG as a reference in its regulatory processes, such as licensing, inspection, or enforcement. However, the NRC staff does not intend to use the guidance in this RG to support NRC staff actions in a manner that would constitute backfitting as that term is defined in 10 CFR 50.109, “Backfitting,” 10 CFR 72.62, “Backfitting,” or as described in NRC Management Directive 8.4, “Management of Backfitting, Forward Fitting, Issue Finality, and Information Requests,” (Ref. 23) nor does the NRC staff intend to use the guidance to affect the issue finality of an approval under 10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants.” The staff also does not intend to use the guidance to support NRC staff actions in a manner that constitutes forward fitting as that term is defined and described in Management Directive 8.4. If a licensee believes that the NRC is using this RG in a manner inconsistent with the discussion in this Implementation section, then the licensee may file a backfitting or forward fitting appeal with the NRC in accordance with the process in Management Directive 8.4. RG 1.245 Revision 0, Page 27 GLOSSARY acceptance criteria Set of conditions that must be met to achieve success for the desired application. aleatory uncertainty Uncertainty based on the randomness of the nature of the events or phenomena that cannot be reduced by increasing the