Event Notification Report for December 12, 2010
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/11/2010 - 12/12/2010
EVENT NUMBERS
46474
Power Reactor
Event Number: 46474
Facility: LIMERICK
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: BRANDON SHULTZ
HQ OPS Officer: JOHN KNOKE
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: BRANDON SHULTZ
HQ OPS Officer: JOHN KNOKE
Notification Date: 12/12/2010
Notification Time: 16:44 [ET]
Event Date: 12/12/2010
Event Time: 11:28 [EST]
Last Update Date: 12/12/2010
Notification Time: 16:44 [ET]
Event Date: 12/12/2010
Event Time: 11:28 [EST]
Last Update Date: 12/12/2010
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):
CHRISTOPHER CAHILL (R1DO)
CHRISTOPHER CAHILL (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
HIGH PRESSURE COOLANT INJECTION SYSTEM UNAVAILABLE
"During quarterly operability verification of the HPCI Turbine Overspeed Trip Assembly, the Trip/Reset knob was manually lifted and released to time the automatic reset function. Upon release of the knob, the Trip Assembly failed to automatically reset (the HPCI Turbine Stop and Control Valves remained closed). Adjustment of the Trip/Reset needle valve was unsuccessful. The HPCI Turbine Stop and Control Valves remain in the tripped condition, rendering HPCI unavailable.
"Engineering and Maintenance have been dispatched to troubleshoot and repair the Overspeed Trip Assembly and restore HPCI to operable status.
"All other required systems are available, operable, and protected."
The licensee is in the 14 day LCO 3.5.1. The licensee has notified the NRC Resident Inspector.
"During quarterly operability verification of the HPCI Turbine Overspeed Trip Assembly, the Trip/Reset knob was manually lifted and released to time the automatic reset function. Upon release of the knob, the Trip Assembly failed to automatically reset (the HPCI Turbine Stop and Control Valves remained closed). Adjustment of the Trip/Reset needle valve was unsuccessful. The HPCI Turbine Stop and Control Valves remain in the tripped condition, rendering HPCI unavailable.
"Engineering and Maintenance have been dispatched to troubleshoot and repair the Overspeed Trip Assembly and restore HPCI to operable status.
"All other required systems are available, operable, and protected."
The licensee is in the 14 day LCO 3.5.1. The licensee has notified the NRC Resident Inspector.