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:
------------------ Section 4.3.5.1 Section text ------------------------ No objection ---------------------------------- Table 4.3.5.1-1 HLR-SY-A through HLR-SY-C ------------------------ No objection ---------------------------------- Table 4.3.5.1-2 SY-A1 through SY-A33 ------------------------ No objection ---------------------------------- Table 4.3.5.1-3 SY-B1 through SY-B17 ------------------------ No objection ---------------------------------- Table 4.3.5.1-4 SY-C1 through SY-C3 ------------------------ No objection ---------------------------------- Section 4.3.5.2 Section 4.3.5.2.1 Section text ------------------------ No objection ---------------------------------- Section 4.3.5.2.2 Section text ------------------------ No objection ---------------------------------- Section 4.3.5.2.3 Section text ------------------------ No objection ---------------------------------- RG 1.247, Appendix A, Page A-13 Table A-7. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for Human Reliability Analysis Index No. Issue Position Resolution Section 4.3.6 Section text ------------------------ No objection ---------------------------------- Section 4.3.6.1 Section text Use of the term “unscreened” may imply that an item was previously screened out and subsequently screened back into the PRA. However, this term is interpreted as meaning activities that were included in the PRA for consideration and evaluation (i.e., screened in). Clarification ...(c) human failure events (HFEs) are defined for unscreened activities modeled in the PRA; Table 4.3.6.1-1 HLR-HR-A through HLR-HR-D ------------------------ No objection ---------------------------------- HLR-HR-E Not including errors of commission (EOCs) presumes that EOCs are not important or significant contributors to the NLWR PRA; however, it is currently not known whether that is the case. Though there is significant experience with operating light- water reactors (LWRs) to justify the consensus approach