Document: NUREG-0800
Document ID: 7916b088-fb90-4163-84fe-027bd315bcc5
Document Type: srp
Title: REVIEW OF RISK INFORMATION USED TO SUPPORT PERMANENT PLANT-
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0717/ML071700658.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.2
CFR Part: 
CFR Title: 

Content:
as where they could be reduced. [Subsection III.2.3] • The scope, level of detail, 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 based on the as-built, as-operated, and maintained plant, including reflecting operating experience at the plant. [Subsection III.2.2] • The plant-specific PRA supporting the licensee’s proposals has been subjected to quality controls such as an independent peer review or certification. [Subsection III.2.2] 19.2-6 June 2007 • Appropriate consideration of uncertainty is given in analyses and interpretation of findings, including using a program of monitoring, feedback, and corrective action to address significant uncertainties. [Subsections III.2.2 and III.3] • The use of core damage frequency (CDF) and large early release frequency (LERF) as bases for probabilistic risk assessment guidelines is an acceptable approach to addressing Principle 4. Use of the Commission's Safety Goal quantitative health objectives (QHOs) in lieu of LERF is acceptable in principle and licensees may propose their use. However, in practice, implementing such an approach would require an extension to a Level 3 PRA, in which case the methods and assumptions used in the Level 3 analysis, and associated uncertainties, would require additional attention. [Subsection III.2.2] • Increases in estimated CDF and LERF resulting from proposed LB changes will be limited to small increments. The cumulative effect of such changes should be tracked and considered in the decision process. [Subsection III.2.2] • The acceptability of the proposed changes should be evaluated by the licensee in an integrated fashion that ensures that all principles are met. [Subsection III.2.3] • Data, methods, and assessment criteria used to support regulatory decisionmaking must be well documented and available for public review.