At 1751 EDT on May 25, 2021, it was determined the local leak rate test (
LLRT) for the
2EMF-IN containment penetration did not meet
10 CFR 50 Appendix J requirements for both the inboard and outboard containment isolation valves (2MISV5230 and 2MISV5231). The
LLRT was performed during the previous refueling outage at which time
primary containment was not required to be operable. The leakage assigned to the penetration also resulted in total leakage exceeding the allowed overall leakage. The valves were repaired and retested satisfactory prior to entering the mode of applicability, This event is being reported as an eight-hour, non-emergency notification per
10 CFR 50.72(b)(3)(ii)(A),
There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified.
