NRC CAL – NOV (White)

On August 11, 2015 the NRC issued a Notice of Violation associated with a White Significance Determination Process finding to Exelon Generation Company, LLC for a violation of 10 CFR Part 50, Appendix B, Criterion III, "Design Control". This violation involved the failure to review the suitability of application of the Division 3 Shutdown Service Water pump modifications, which were essential to the safety related functions of the High Pressure Core Spray system. Specifically, on or about October 3, 1995, the licensee failed to ensure the modified pump internals would not degrade under expected operating conditions in a way that impacted the safety function. The licensee determined the pump failed at the conclusion of its surveillance run on May 30, 2014, but this condition did not reveal itself until the pump failed to start on September 16, 2014. This resulted in the pump being inoperable for approximately 108 days, a period greater than the allowed limiting condition for operation outage times provided in the plant technical specifications (TS). Additionally, because the licensee was not aware of the pump's inoperability during the unit's operation cycle, the required actions of the TS were not followed.