Document: NUREG-0800
Document ID: 4e1d86bd-74a5-4678-8bc0-ffce3ba28ea0
Document Type: srp
Title: RISK-INFORMED INSERVICE TESTING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0428/ML042880272.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.7
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CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Mechanical Engineering Branch (EMEB) Secondary - Probabilistic Safety Assessment Branch (SPSB) INTRODUCTION The NRC's policy statement on probabilistic risk analysis (PRA)(Ref. 1) encourages greater use of this analysis technique to improve safety decisionmaking and improve regulatory efficiency. One activity under way in response to the policy statement is the use of PRA in support of decisions to modify an individual plant's inservice testing (IST) program. Licensee-initiated IST Program changes which are consistent with currently approved staff positions [e.g., regulatory guides, standard review plans, branch technical positions] are normally evaluated by the staff using traditional, engineering analyses. In such cases, a licensee would not be expected to submit risk information in support of the proposed change. Licensee-initiated IST program change requests that go beyond current staff positions may be evaluated by the staff using traditional engineering analyses as well as the risk-informed approach set forth in Regulatory Guide 1.175, "An Approach for Plant-Specific Risk-informed Decisionmaking: Inservice Testing," (Ref. 3). A licensee may be requested to submit supplemental risk information if such information is not provided in the proposed risk-informed inservice testing (RI-IST) program submittal by the licensee. If risk information on the proposed RI-IST program is not provided to the staff, the staff will review the information provided by the licensee to determine whether the application can be approved based upon the information provided using traditional methods and will either approve or reject the application based upon the review. For those licensee-initiated USNRC STANDARD REVIEW PLAN Standard review plans are prepared for the guidance of the Office of Nuclear Reactor Regulation staff responsible for the review of applications to construct and operate nuclear power plants. These documents are made available to