NRC CAL – NOV (White)

On October 18, 2022, the NRC issued a notice of violation associated with a white significance determination process finding to Dominion Energy (licensee) at Virgil C. Summer Nuclear Station. The white finding, an issue of low-to-moderate safety significance, involved the licensee’s failure to adequately assess erratic emergency diesel generator (EDG) governor operation which resulted in an inoperable EDG. This failure to document the EDG performance is a violation of 10 CFR 50, Appendix B, Criterion XVI and since this inoperable EDG exceeded the licensee’s technical specification (TS) allowed outage time, a TS violation was also issued.