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:
d seismic-specific job aids and training. SPR-D4 The action verb ESTIMATE implies using judgement or qualitative measures only which are inconsistent with the intent of the SR. Some of the examples of approaches provide more information than an estimate. Qualification For significant HFEs, ESTIMATE DETERMINE the timing aspects of the response actions (i.e., time of relevant indication, time available to complete action, and time required to complete action) recognizing the sequence of events and expected seismic conditions based on one or a combination of the following approaches: (a) Walk-throughs or talk-throughs of procedures with plant operations or training personnel (b) Simulator observations DG-1362, Appendix B, Page B-24 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 (c) Plant-specific thermal-hydraulic analyses (d) Realistic and applicable generic or similar plant thermal-hydraulic analyses. Based on a review of procedures with plant operations or training personnel and recognizing the sequence of events and expected seismic conditions, CONFIRM for nonsignificant HFEs the timing aspects of the response actions. SPR-D5 -------------------- No objection -------------------- Notes -------------------- No objection -------------------- Table 5-2.3-6 Introductory text -------------------- No objection -------------------- SPR-E1 through SPR-E3 -------------------- No objection -------------------- SPR-E4 The phrase “dominant sequence insights” is not defined in either Addendum A or Addendum B. The term “dominant” was intentionally not used anywhere in the standard. Clarification USE the quantification process to ensure that the components screened out, based on the