Document: NUREG-0800
Document ID: e32f0820-4e33-476e-aa36-4ca8c2c64af0
Document Type: srp
Title: Use of Probabilistic Risk Assessment in Plant-Specific, Risk-Informed Decisionmaking:
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0119/ML011940192.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
CFR Part: 
CFR Title: 

Content:
using the delete function?) Does the application affect equipment credited for recovery actions (including credit for inter-system or inter-unit crossties)? Analysis of Results * Does the application necessitate an assessment of uncertainty, and is it to be qualitative or quantitative? * Are there uncertainties in the application that could be clarified by the application of sensitivity studies? * Does the application strategy necessitate an importance analysis to rank contributions? • Does the application necessitate the performance of an importance, uncertainty, or sensitivity analysis of the base case PRA? Plant Damage State Classification Does the application impact the choice of parameters used to define plant damage states? Do the key plant damage states (KPDSs) utilized adequately represent the results of the Level 1 analysis by including the plant damage states that have a significant frequency of occurrence? Have those plant damage states that have been eliminated in this process been assigned to KPDSs of higher consequence (e.g., likelihood of large early release)? SRP 19-31 Table I11-1 (page 3 of 3) Questions -to Assist in Establishing the Cause-Effect Relationship LEVEL 2 (CONTAINMENT ANALYSIS) Have new containment failure modes identified by the application been addressed in the PRA? Are potential changes accounted for? * Are any dependencies among containment failure modes being changed? * Does the application involve mechanisms that could lead to containment bypass? * Does the application involve mechanisms that could cause failure of containment isolation? * Does the application directly affect the occurrence of any severe accident phenomena? * Does the application necessitate use of risk measures other than large early release? • Does the application change equipment qualification to the point where it affects timing of equipment failure relative to containment failure? Does the application affect core debris path to the sump / suppression pool