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:
red in the decision process. Depending on the circumstances, the cognizant review branch may have additional specific guidance available for use in reviewing the quality and acceptability of the data. However, the data or analyses must be clearly applicable to the plant and specific circumstances in which they are being applied. III.2.1.3 Current Regulations Reviewers should ensure that the proposed change satisfies current regulations (including the General Design Criteria), unless the licensee explicitly includes a proposed exemption (i.e., a "specific exemption" as allowed by 10 CFR 50.12). The LB also applies until the staff approves modifications to the existing basis. It is expected that some applications will seek to modify the LB in risk-informed submittals. Applications that 19.2-12 June 2007 seek to make qualitative changes to the LB (such as moving components out of the scope of a required program) should be reviewed in greater detail with respect to defense in depth and safety margins when compared to applications that seek to make parametric changes (such as incremental changes to surveillance interval). III.2.2 Risk Assessment For effective implementation of risk-informed regulatory approaches, reviewers should ensure that the licensee has demonstrated that the plant’s design and actual operating conditions and practices are properly reflected in the risk insights derived using the plant-specific PRA model. Otherwise, the risk assessment may provide inaccurate or misleading information that will require careful scrutiny before use in any regulatory decisionmaking process. Development of a plant-specific, risk-informed program also requires the availability of information to identify the SSCs and human actions that contribute most significantly to the plant’s estimated risk. In addition, it is necessary to be able to capture the impact of the proposed change on the elements of the PRA. Subsection III.2.2.1 of this SRP section discusses the