Document: NRC Regulatory Guide
Document ID: 8a2332d3-66ca-40af-84e1-507db8b26559
Document Type: regulatory_guide
Title: TRIAL - Acceptability of Probabilistic Risk Assessment Results for Non-Light Water Reactor Risk-Informed Activities
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2123/ML21235A008.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.247
CFR Part: 
CFR Title: 

Content:
---- No objection ---------------------------------- Section 4.3.14.3 Section text ------------------------ No objection ---------------------------------- Table 4.3.14.3-1 HLR-OPR-A through HLR-OPR-E ------------------------ No objection ---------------------------------- RG 1.247, Appendix A, Page A-68 Table A-15. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for Other Hazards PRA Index No. Issue Position Resolution Table 4.3.14.3-2 OPR-A1 through OPR-A4 ------------------------ No objection ---------------------------------- Table 4.3.14.3-3 OPR-B1 through OPR-B12 ------------------------ No objection ---------------------------------- Table 4.3.14.3-4 OPR-C1 through OPR-C5 ------------------------ No objection ---------------------------------- OPR-C6 Failing to perform a feasibility assessment may result in some HEPs being assigned a value less than 1.0 when the assigned value should be 1.0. If an HFE that is not feasible is assigned an HEP value less than 1.0, but a feasibility assessment would otherwise demonstrate that the HFE is not feasible, the PRA model may underestimate the risk from that contributor. Qualification CC-I: ASSESS the feasibility of the HFE using the criteria in HR-H2. If the HFE is not feasible, ASSIGN an HEP of 1.0 or DO NOT CREDIT the HFE in the PRA. For HFEs determined to be feasible, USE screening values in accordance with Requirement OPR-C5 for the HEPs for HFEs included in the hazard PRA model. CC-II: … Attention is to be given to how the hazard situation alters previous assessments in non- hazard analyses as to the feasibility, influencing factors, and the timing considerations in Requirements HR-G1, HR- G4, HR-G6, and HR-G8 except when they are not applicable. OPR-C7 through OPR-C8 ------------------------ No objection ---------------------------------- Table 4.3.14.3-5 RG 1.247, Appendix A, Page A-69 Table A-15. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for Other Hazards PRA Index No.