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:
listic response analysis is performed to calculate structural loads and floor response spectra, ENSURE that the number of simulations done (e.g., Monte Carlo simulation or Latin Hypercube Sampling) is large enough to calculate stable responses. ACCOUNT for the entire spectrum of input ground motion levels displayed in the seismic hazard curves. Table 5-2.2-4 Introductory text -------------------- No objection -------------------- DG-1362, Appendix B, Page B-14 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 SFR-C1 The intent is to provide the basis and methodology to justify that the capacity of the SSC exceeds the screening level. Clarification SPECIFY the basis and methodologies established for the capacity-based screening for the level defined in SPR-B5 (e.g., use of simplified fragility analysis, use of applicable generic fragility or qualification data or earthquake experience, and use and applicability of EPRI fragility screening guidance are examples). SFR-C2 In ASME/ANS RA-Sa- 2009, Note (2) of the corresponding supporting requirement (i.e., SFRB2) indicates that the screening criteria do not apply to high-seismic regions such as coastal California. However, SFR-C2 in the Code Case does not discuss this note. Qualification SPECIFY JUSTIFY the basis for screening of inherently rugged components (e.g., applicability of fragility or qualification test data, earthquake experience, past fragility analysis for similar SSCs and seismic responses, applicable EPRI guidance). Table 5-2.2-5 Introductory text -------------------- No objection -------------------- SFR-D1, SFR-D2 -------------------- No objection -------------------- SFR-D3 For CC I: In general, the walkdown AND the