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
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Content:
has been subjected to quality controls such as an independent peer review or certification. • 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. 19.2-36 June 2007 • 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. IV.2 Definition of the Proposed Change • Adequate traditional engineering and probabilistic evaluations are available to support the proposed LB change. Plant-specific and relevant industry data and operational experience also support the proposed change. • Cause-effect relationships have been identified to adequately link the application with the evaluation models, and the proposed models can effectively evaluate or realistically bound the effects of the proposed change. • Information from engineering analyses, operational experience, and plant-specific performance history have been factored into the decisionmaking process. IV.3 Evaluations of Defense-In-Depth Attributes and Safety Margins • Defense in depth is preserved (for example, system redundancy, diversity, and independence are maintained