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:
ent Risks: Sequoyah Unit 1," NUREG/CR-4551, Vol. 5, Rev. 1, Parts 1 and 2, December 1990. USNRC, "Evaluation of Severe Accident Risks: Grand Gulf Unit 1," NUREG/CR-4551, Vol. 6, Rev. 1, Parts 1 and 2, December 1990. USNRC, "Integrated Risk Assessment for the LaSalle Unit 2 Nuclear Power Plant: Phenomenology and Risk Uncertainty Evaluation Program (PRUEP)," NUREG/CR-5305, December 1990. USNRC, "Evaluation of Severe Accident Risks: Zion Unit 1," NUREG/CR-4551, Vol. 7, Rev. 1, March 1993. USNRC, "An Approach for Estimating the Frequencies of Various Containment Failure Modes and Bypass Events," Draft NUREG/CR-6595, November 1997. SRP 19-A30 APPENDIX B INTEGRATED DECISIONMAKING Risk-informed applications are expected to require a process to integrate traditional engineering and probabilistic considerations to form the basis for acceptance. In order for this decisionmaking process to be effective in rendering accurate representations of plant safety and risk, the staff anticipates that licensees will have documented guidance to ensure consistent and defensible results. Such guidance would also allow staff reviewers to reconstruct the logic and events involved in the integration process. This appendix discusses issues that the staff should address during reviews of the licensees' integrated decisionmaking process (sometimes referred to as the "expert panel" process). a. Areas of Review Staff reviewers are expected to evaluate proposed changes to the LB by taking into account both traditional and probabilistic engineering considerations. For each change, reviewers should evaluate the licensee's justification for the change and the process by which the results were obtained. In many pilot risk-informed applications, licensees have justified changes to the LB through the use of integrated decisionmaking panels (or expert panels) especially in cases where there are broad applications of PRA and traditional engineering results over a large number of plant elements (Se0s,