ENS 52352

v t e ENS Event
21:09 Nov 7, 2016
Title	Hpci Declared Inoperable Due to Failure of Ist Surveillance Test
Event Description	On November 7, 2016, at 1609 [EST], with the reactor at 100 percent core thermal power and steady state conditions, the High Pressure Coolant Injection (HPCI) system was declared inoperable. Pilgrim Nuclear Power Station (PNPS) was performing planned quarterly testing per Technical Specifications 4.13.A.1. During a review of the HPCI pump data taken during the test, it was determined that the recorded vibration reading on the Main Pump Outboard horizontal point (P4H) was 0.8335 in./sec which exceeds the IST required action range high limit of less than or equal to 0.830 in./sec. Accordingly, the HPCI pump was declared inoperable. The Limiting Condition for Operation Action Statement 3.5.C.2 has been entered and planned troubleshooting Into the cause of the high vibration is in progress. In accordance with 10 CFR 50.72(b)(3)(v)(D), PNPS is providing an 8-hour non-emergency notification that the HPCI System is inoperable. This event had no impact on the health and/or safety of the public. The NRC Resident Inspector has been notified. The licensee will be notifying the State of Massachusetts regarding the event.

ENS 52352 +/-
Where
Pilgrim Massachusetts (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+-0.42 h-0.0175 days <br />-0.0025 weeks <br />-5.75316e-4 months <br />)
Opened:	Mike Hettwer 20:44 Nov 7, 2016
NRC Officer:	Jeff Herrera
Last Updated:	Nov 7, 2016
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v • d • e

v t e Emergency Notification System
Pilgrim with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
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