Document: NRC Regulatory Guide
Document ID: 22ccfd5e-c5d8-4615-a02c-32369aa9f533
Document Type: regulatory_guide
Title: Acceptability of Probabilistic Risk Assessment Results for Risk-Informed Activities (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1930/ML19308B636.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.200
CFR Part: 
CFR Title: 

Content:
ndum A or Addendum B. The term “dominant” was intentionally not used anywhere in the standard. Clarification USE the quantification process to ensure that the components screened out, based on the screening level defined in SPR-B5, do not become a significant contributor or do not invalidate the dominant significant sequence insights of the seismic PRA. SPR-E5 For CC II: It is not possible or necessary to quantify all uncertainties. Clarification For CC II: QUANTIFY the mean core damage frequency and large early release frequency and propagate the parameter uncertainty that results from each input (i.e., the seismic hazard, the seismic fragilities, and the systems analysis). SPR-E6 -------------------- No objection -------------------- SPR-E7 For CC II: The reference to Part 2 is missing for HLR-QU-E for CCII. Clarification For CC II: PERFORM the uncertainty analysis consistent with HLR-QU-E of Part 2 addressing key assumptions in the hazard analysis (see SHA-J2), fragility analysis (see SFR-F3), and system modeling for Capability Category II. DG-1362, Appendix B, Page B-25 Table B-1. Staff Position on ASME/ANS RA-S Case 1, “Case for ASME/ANS RA-Sb-2013 Standard for Level 1/Large Early Release Frequency Probabilistic Risk Assessment of Nuclear Power Plant Applications,” Technical and Peer Review Requirements of a Level 1, Seismic PRA for the At-Power Operating Mode Index No Issue Position Resolution Notes -------------------- No objection -------------------- Table 5-2.3-7 Introductory text -------------------- No objection -------------------- SPR-F1 -------------------- No objection -------------------- SPR-F2 The Code Case needs to specify the type of documentation to be provided, rather than relying on the discretion of the user. Clarification DOCUMENT the process used in the seismic plant-response analysis and quantification, including. For example, this documentation typically includes a description of SPR-F3 -------------------- No objection