ENS 45584

v t e ENS Event
19:37 Dec 21, 2009
Title	Hpci Declared Inoperable
Event Description	High Pressure Coolant Injection [HPCI] system was declared inoperable due to failure of the turbine governor valve to open with the Auxiliary Oil Pump [AOP] running. The AOP had been started to obtain oil samples for routine maintenance. The turbine was not expected to roll since there was no initiation signal, but the HPCI governor valve was expected to open to try to raise HPCI speed. Failure of the governor valve to open would prevent HPCI from achieving rated system flow and pressure. HPCI is also considered unavailable. All remaining ECCS systems and RCIC are operable. Cause of the condition is currently unknown. Troubleshooting activities are being planned. HPCI is a single train system. This report is submitted in accordance with 10 CFR 50.72(b)(3)(v) as a condition that at time of discovery could prevent the fulfillment of the safety function of an SSC [Structure, System and Components] needed to mitigate the consequence of an accident. The NRC Resident Inspector has been notified of this event.

ENS 45584 +/-
Where
Cooper Nebraska (NRC Region 4)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+0.67 h0.0279 days <br />0.00399 weeks <br />9.17766e-4 months <br />)
Opened:	Andrew Ohrablo 20:17 Dec 21, 2009
NRC Officer:	Charles Teal
Last Updated:	Dec 21, 2009
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v • d • e

v t e Emergency Notification System
Cooper with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2024-03-13T10:48:00 [Table view]
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