NRC CAL – NOV (White)

On December 11, 2018, 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 XVI at Peach Bottom Atomic Power Station, associated with a White Significance Determination Process finding. Contrary to the requirements, Exelon failed to assure that a condition associated with the E-3 EDG scavenging air check valve was promptly identified and corrected. Specifically, after identifying on April 1, 2017, that the E-3 EDG scavenging air check valve assembly was loose due to wear around the interference fit pin, and identifying on September 20, 2017, that there was an oil leak on the scavenging air check valve dashpot assembly, Exelon did not take adequate corrective actions to address these adverse conditions. Additionally, the unavailability of the EDG resulted in a violation of Technical Specification 3.8.1, "ECCS-Operating," which requires all four EDGs to be operable in Mode 1, and if any EDG is inoperable that it be returned to operable status within 14 days or the unit shall down and in Mode 3 within 12 hours.