Event Notification Report for December 21, 2009
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/20/2009 - 12/21/2009
EVENT NUMBERS
45584
Power Reactor
Event Number: 45584
Facility: COOPER
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: ANDREW OHRABLO
HQ OPS Officer: CHARLES TEAL
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: ANDREW OHRABLO
HQ OPS Officer: CHARLES TEAL
Notification Date: 12/21/2009
Notification Time: 20:17 [ET]
Event Date: 12/21/2009
Event Time: 13:37 [CST]
Last Update Date: 12/21/2009
Notification Time: 20:17 [ET]
Event Date: 12/21/2009
Event Time: 13:37 [CST]
Last Update Date: 12/21/2009
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
WAYNE WALKER (R4DO)
WAYNE WALKER (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
HPCI DECLARED INOPERABLE
"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."
"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."