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:
an independent peer review, and by a focused-scope application-specific review by the staff. • Results are robust in terms of uncertainties and sensitivities to the key modeling parameters. • Key performance elements for the application have been appropriately classified and performance is backed up by licensee actions. IV.7 Evaluation of Risk Impact • If the risk-informed application assesses whether it meets Principle 4 by evaluating the change to risk quantitatively, then the following applies: < The application either decreases plant risk, or if an application increases risk, the increase is within the guidelines defined in Regulatory Guide 1.174. The cumulative and synergistic effects on risk from the present and previous applications have been addressed. Licensee risk-management practices are being followed to minimize the risk from plant operations. < An appropriate consideration of uncertainties is provided in support of the proposed application. The licensee showed that even taking into account the uncertainties in the analysis, the evaluation of the change in risk was robust in that there can be confidence in the conclusions drawn with respect to the nature of the change compared with the acceptance guidelines. This argument was supported either by explicit propagation or by a qualitative and/or sensitivity analysis showing that no event contributing to the change in risk is subject to significant uncertainty. • If the risk-informed application is based on a qualitative assessment of the change to risk, the application is shown to result in a decrease in plant risk, or is risk neutral, or 19.2-38 June 2007 CDF and LERF increases are shown to be acceptable on the basis of bounding evaluations or sensitivity studies. IV.8 Integrated Decisionmaking Process • Results from traditional engineering analyses and risk analyses have been used to ensure that the principles for risk-informed decisionmaking have been met. • Potential analysis limitations,