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:
objection -------------------- DG-1362, Appendix A, Page A-30 Table A-4. Staff Position on ASME/ANS RA-Sa-2009 Part 4, Technical and Peer Review Requirements for At-Power Internal Fire Index No Issue Position Resolution QNS-C1 The screening criteria in Capability Categories II and III should relate to the total CDF and LERF for the fire risk, not the internal events risk. See Issue for 4-2.2-2(c). NOTE ES-C1 Clarification Cat II: …and • the sum of the CDF contribution for all screened fire compartments is <10% of the estimated total CDF for internal fire events and • the sum of the LERF contributions for all screened fire compartments is <10% of the estimated total LERF for internal fire events Cat III: …and • the sum of the CDF contributions for all screened fire compartments is <1% of the estimated total CDF for internal fire events and • the sum of the LERF contributions for all screened fire compartments is <1% of the estimated total LERF for internal fire events QNS-D1, QNS-D2 -------------------- No objection -------------------- 4-2.9 – CF 4-2.9 -------------------- No objection -------------------- Table 4-2.9-1 -------------------- No objection -------------------- Tables 4-2.9-2(a) thru 4-2.9-5(d) CF-A1 See Issue for ES-C1 Clarification NOTE CF-A1-1: … for non-risk significant contributors (as defined in Part 1), … DG-1362, Appendix A, Page A-31 Table A-4. Staff Position on ASME/ANS RA-Sa-2009 Part 4, Technical and Peer Review Requirements for At-Power Internal Fire Index No Issue Position Resolution CF-A2 -------------------- No objection -------------------- CF-B1 -------------------- No objection -------------------- 4-2.10 – HRA 4-2.10 -------------------- No objection -------------------- Table 4-2.10-1 -------------------- No objection -------------------- Tables 4-2.10-2(a) thru 4-2.10-6(e) HRA-A1 thru HRA-A4 -------------------- No objection -------------------- HRA-B1 thru HRA-B4 -------------------- No objection