NRC CAL – NOV (White)

On April 1, 2019, the NRC issued a Notice of Violation to Exelon Generation Company (Exelon) for a violation of Title 10 of the Code of Federal Regulations Part 50, Appendix B, Criterion V at Clinton Power Station, associated with a White Significance Determination Process finding. Contrary to the requirements of numerous quality related procedures, Exelon failed to properly restore an emergency diesel generator (EDG) during shutdown conditions and subsequently began maintenance on the other emergency diesel generator. The resulting plant condition was that no emergency diesel generator was immediately available to provide on-site back-up electrical power for a period more than 3 days. Additionally, the unavailability of the EDG resulted in a violation of Technical Specification 3.8.2, "AC Sources - Shutdown," which requires at least one EDG to be operable in Mode 5, and at least one EDG shall be restored immediately when it is determined that none is operable.