Document: NUREG-0800
Document ID: b07c8dd1-23f6-41f1-a3ba-aa378f9ea59a
Document Type: srp
Title: RISK-INFORMED INSERVICE INSPECTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0325/ML032510135.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.8
CFR Part: 
CFR Title: 

Content:
program in general terms. The reviewer ensures that the licensee has confirmed that the plant is designed and operated in accordance with the approved requirements and that the PRA used in support of their RI-ISI program submittal reflects the actual plant. The reviewer verifies that the licensee has identified regulations and licensing commitments that impact the current ISI requirements. This includes, but is not limited to, rules and regulations, FSAR, technical specifications, licensing conditions, and licensing commitments. The reviewer also verifies that the piping systems, segments, and welds that are affected by the change in ISI program are identified. In addition, the description of the proposed change is reviewed to verify that plant systems and functions that rely on the affected piping have been identified. The characterization of the proposed change in the ISI program is reviewed to verify that the industry and plant specific information relevant to the piping degradation mechanisms has been considered. The description of the proposed change is also reviewed to verify that information that characterizes the relative effectiveness of past inspections and the types of flaws that have been identified has been considered. In addition, the reviewer verifies that specific revisions to existing inspection schedules, locations, and techniques have been described. III.2 Element 2: Engineering Analysis In the second element, the staff reviewer verifies that the licensee’s engineering analysis of the proposed changes uses a combination of traditional engineering analysis with supporting insights from a PRA. To be acceptable, the licensee should have verified that defense in depth is maintained, sufficient safety margins are maintained, and that proposed increases in risk, and their cumulative effect, are small and do not cause the NRC Safety Goals to be exceeded. Regulatory Guides 1.174 and 1.178 provide guidance for the performance of this evaluation. III.2.1