Abstract

On July 26, 2019, the NRC issued Inspection Procedure 71111, Attachment 21N.02 (IP 71111.21N.02), “Design-Basis Capability of Power-Operated Valves Under 10 CFR 50.55a Requirements.” The objective of this inspection procedure is to assess the reliability, functional capability, and design basis of risk-important power-operated valves (POVs) as required by Section 55a, “Codes and Standards,” in Part 50, “Domestic Licensing of Production and Utilization Facilities,” of Title 10, “Energy,” in the Code of Federal Regulations (10 CFR 50.55a). The NRC staff has implemented this inspection procedure at operating nuclear power plants in the United States (U.S.) since January 2020 and has gained lessons learned through implementation of and feedback from the inspections. The staff has held a public meeting with nuclear power plant licensees to discuss the lessons learned from the inspection activities in December 2020. This paper describes the status of the ongoing NRC staff activities for POV inspections at operating U.S. nuclear power plants and the lessons learned through implementation of the inspections.

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