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
CFR Part: 
CFR Title: 

Content:
have been used for IST components. Justification has been provided for the failure rates and monitoring will provide ongoing justification. The licensee has reviewed the modeling of compensating SSCs, and concluded that it is appropriate and that the significance of IST events is not distorted by modeling of compensating SSCs. 8. Integrated Decisionmaking If the licensee's proposed alternative is acceptable in light of the safety significance of the component, and if the licensee's risk-informed IST program meets the detailed acceptance guidelines specified herein, the staff should be able to reach the following general conclusion: The licensee's proposed RI-IST program is authorized as an alternative to the ASME Code-required IST program (e.g, including test frequency, test methods, and program scope requirements) pursuant to §50.55a(a)(3)(i), based on the alternative providing an acceptable level of quality and safety. B. IMPLEMENTATION, PERFORMANCE MONITORING, AND CORRECTIVE ACTION 1. Program Implementation The reviewer should verify that the licensee provided sufficient information is provided in accordance with the guidance herein and that the evaluation supports conclusions of the following type, to be included in the staffs safety evaluation report: * For components in the high safety-significance category, the licensee will either continue to test these components in accordance with the current ASME Code of record for the facility (i.e., test frequency and method requirements) or has proposed an 3.9.7-30 Rev. 0 - August 1998 alternate test strategy that is acceptable to the staff (via either an NRC-endorsed ASME Code Case or a plant-specific relief request). Testing strategies are adequately described in the licensee's RI-IST Program Plan and were found to be acceptable. * For components in the low safety-significance category, the licensee will either continue to test these components in accordance with the current ASME Code of record for the facility or