Document: NUREG-0800
Document ID: ac43f632-9db1-4857-9f56-bfba45965456
Document Type: srp
Title: * These are modifications to a plant’s design, operations, or other activities that require NRC approval. These modifica
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0232/ML023250195.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19
CFR Part: 
CFR Title: 

Content:
impact of the proposed change is monitored using performance-based strategies. • All safety impacts of the proposed change are evaluated in an integrated manner as part of an overall risk management approach in which the licensee is using risk analysis to improve operational and engineering decisions broadly by identifying and taking advantage of opportunities to reduce risk, not just to eliminate requirements the licensee sees as undesirable. For those cases when risk increases are proposed, the benefits have been described and these benefits are commensurate with the proposed risk increases. The approach used to identify reduced requirements was also used to identify whether 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 plant-specific PRA supporting the licensee’s proposals has been subjected to quality controls such as an independent peer review or certification. SRP 19-35 • Appropriate consideration of uncertainty has been given to results of the analyses and interpretation of findings, including the use of a program of monitoring, feedback, and corrective action 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