Auxiliary Feedwater System Risk-Based Inspection Guide for the D.C. Cook Nuclear Power Plant

摘要

In a study sponsored by the U.S. Nuclear Regulatory Commission (NRC), Pacific Northwest Laboratory has developed and applied a methodology for deriving plant-specific risk-based inspection guidance for the auxiliary feedwater (AFW) system at pressurized water reactors that have not undergone probabilistic risk assessment (PRA). Existing PRA-based inspection guidance information recently developed for the NRC for various plants was used to identify generic component failure modes. The information was then combined with plant-specific and industry-wide component information and failure data to identify failure modes and failure mechanisms for the AFW system at the selected plants. D. C. Cook was selected as one of a series of plants for study. The product of the effort is a prioritized listing of AFW failures which have occurred at the plant and at other PWRs. The listing is intended for use by NRC inspectors in the preparation of inspection plans addressing AFW risk-important components at the D.C. Cook plant.