Survey and evaluation of vital instrumentation and control power supply events

This report describes Task 15, Review of Experience Data for Power Supply Adverse System Interaction Events, for the System Interaction project (FIN No. B0789) sponsored by the Nuclear Regulatory Commission being performed at the Oak Ridge National Laboratory Nuclear Operations Analysis Center. The task included (1) assessing the nuclear power plant operating experience data sources, (2) developing search methods and event selection criteria for identifying losses of instrumentation and control power supply events, (3) reviewing all of the events selected, and (4) performing a final evaluation of the events. This report outlines each of these steps and presents the results of this review.