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:
---------- Table 4.3.10.3-2 SPR-A1 through SPR-A4 ------------------------ No objection ---------------------------------- Table 4.3.10.3-3 SPR-B1 through SPR-B13 ------------------------ No objection ---------------------------------- Table 4.3.10.3-4 SPR-C1 through SPR-C6 ------------------------ No objection ---------------------------------- Table 4.3.10.3-5 SPR-D1 through SPR-D4 ------------------------ No objection ---------------------------------- SPR-D5 The feasibility of operator actions in seismic PRA should be assessed. Further, ESQ-C7 requires that human actions be feasible to use their HEPs in event sequence quantification. The CC-II requirement incorrectly states that CC-I of HLR-HR-G should be satisfied. Qualification CC-I When addressing feasibility, influencing factors, and the timing considerations covered in Requirements HR-G1, HR-G4, HR-G6, and HR-G8, INCLUDE... CC-II For developing HEPs, SATISFY the Capability Category I II SRs of HLR-HR-G, except where the requirements are not applicable, taking into account relevant seismic related effects on control room and ex-control room post-initiator actions. When addressing feasibility influencing factors and the timing considerations covered in Requirements HR-G1, HR- G4, HR-G6, and HR-G8, INCLUDE the effect of the seismic hazard on the control RG 1.247, Appendix A, Page A-47 Table A-11. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for Seismic PRA Index No. Issue Position Resolution room and ex-control room human actions. Table 4.3.10.3-6 SPR-E1 through SPR-E7 ------------------------ No objection ---------------------------------- SPR-E8 This SR evaluates the sources of uncertainty, related assumptions, and reasonable alternatives for the seismic fragility analysis. This SR should be coupled with SFR-E6 because it is important to determine and disposition and impact of these sources of uncertainty for pre-operational stage PRAs. Not identifying and dispositioning the impacts of