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:
y if there are areas where requirements should be increased. * The scope and quality of the engineering analyses (including traditional and probabilistic analyses) conducted to justify the proposed LB change are appropriate for the nature and scope of the change and are derived on the basis of the as-built, as-operated and as-maintained plant, including operating experience at the plant. The portions of the plant-specific PRA relevant to the application should contain the characteristics and attributes of a PRA as defined in Appendix A to Regulatory Guide SRP 19-35 1. 174. It should also be subjected to an independent peer review to determine whether it contains those characteristics and attributes. The plant-specific PRA supporting the licensee's proposals has been subjected to quality assurance methods and quality control methods. Appropriate consideration of uncertainty has been given to analyses results and interpretation of findings, including the use of a program of monitoring, feedback, and corrective aclion to address significant uncertainties, where applicable. CDF and LERF are used as bases for probabilistic risk assessment guidelines for addressing Principle 4. If the Commission's Safety Goal QHOs have been used in lieu of LERF, the implementation of such an approach included justification of the methods and assumptions used in the analysis and treatment of uncertainties. Increases in estimated CDF and LERF resulting from proposed LB changes are limited to small increments, and the cumulative effects of such changes are tracked and considered in the decision process. The acceptability of the proposed changes has been evaluated by the licensee in an integrated fashion that ensures that all principles are met. Data, methods, and assessment criteria used to support regulatory decisionmaking are clearly documented and available for public review. Definition of the Proposed Change Adequate traditional engineering and probabilistic evaluations are available to