Document: NUREG-0800
Document ID: e32f0820-4e33-476e-aa36-4ca8c2c64af0
Document Type: srp
Title: Use of Probabilistic Risk Assessment in Plant-Specific, Risk-Informed Decisionmaking:
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0119/ML011940192.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
CFR Part: 
CFR Title: 

Content:
ndment requests submitted for NRC review and approval for which PRA can play an effective role in the decisionmaking process. General review guidance for applicable activities is presented in this SRP chapter. In addition, application-specific SRP chapters are available to provide additional guidance for several activities including the following examples: changes to allowed outage times (AOTs) and surveillance test intervals (STIs) in plant-specific technical specifications (SRP Chapter 16.1) changes in the scope and frequency of tests on pumps and valves in a licensee's inservice test (IST) program (SRP Chapter 3.9.7) changes in the scope and frequency of inspections in a licensee's inservice inspection (ISI) program (draft SRP Chapter 3.9.8) RG 1.174 defines an acceptable approach for use in analyzing and evaluating proposed LB changes. This approach supports the staff's desire to base its decisions on the results of traditional engineering evaluations, supported by insights (derived through the use of PRA methods) on the risk significance of the proposed changes. The decisionmaking process leading to the proposed change is expected to follow an integrated approach (considering traditional engineering and risk information) and may build upon qualitative factors as well as quantitative analyses and information. As discussed later in this section, the scope of the staff review of a risk-informed application will depend on the specifics of the application. However, this scope should include reviewing the four elements suggested in Section 2 of RG 1.174. The areas of review for each of these elements are summarized as follows: Element 1 - Define the Proposed Change: The objective of this element is to lay the groundwork for evaluating the safety impacts of the proposed change. Therefore, one area of review would be an evaluation of the proposed change in light of the LB (i.e., evaluation of the structures, systems, and components (SSCs), as well as the plant