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| Entered date | Event description | |
|---|---|---|
| ENS 52388 | 21 November 2016 21:22:00 | At 1738 (EST) on November 21, 2016, a leak was identified inside the Vapor Containment building on a Service Water line associated with 24 Fan Cooler Unit. The leak was isolated at 1743 by shutting the Service Water Isolation valves to 24 Fan Cooler Unit. This isolation meets the Technical Specifications of 3.6.1 Condition A Required Action. The leaking defect could have resulted in post-LOCA air leakage out of containment in excess of that allowed by Technical Specification 3.6.1 (Containment) which requires leakage rates to comply with 10 CFR 50, Appendix J. This event had no effect on the health and safety of the public. This event is being reported under 10 CFR 50.72(b)(3)(v) and the guidance of NUREG 1022, section 3.2.7 as a loss of safety function. The service water was quantified at approximately 15 gpm. The licensee notified the NRC Resident Inspector. |