Event Notification Report for February 05, 2011
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
02/04/2011 - 02/05/2011
EVENT NUMBERS
46595
Power Reactor
Event Number: 46595
Facility: FORT CALHOUN
Region: 4 State: NE
Unit: [1] [] []
RX Type: (1) CE
NRC Notified By: SCOTT MOECK
HQ OPS Officer: DONG HWA PARK
Region: 4 State: NE
Unit: [1] [] []
RX Type: (1) CE
NRC Notified By: SCOTT MOECK
HQ OPS Officer: DONG HWA PARK
Notification Date: 02/06/2011
Notification Time: 03:37 [ET]
Event Date: 02/05/2011
Event Time: 22:17 [CST]
Last Update Date: 02/06/2011
Notification Time: 03:37 [ET]
Event Date: 02/05/2011
Event Time: 22:17 [CST]
Last Update Date: 02/06/2011
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(B) - POT RHR INOP
10 CFR Section:
50.72(b)(3)(v)(B) - POT RHR INOP
Person (Organization):
LINDA HOWELL (R4DO)
LINDA HOWELL (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 1 | Startup | 1 | Startup |
BOTH TRAINS OF AUXILIARY FEED WATER DISABLED
"On February 5, 2011, both trains of the Auxiliary Feed Water system were disabled while transitioning from Auxiliary Feed Water to Main Feed Water during plant start up. While performing OI-AFW-4 attachment 3, FW-6 Electric Driven AFW Pump Operations, both Steam Generator Auxiliary Feed Water inlet valves (HCV-1107A and HCV-1108A) control switches were placed in 'CLOSE'. This action defeated the Auxiliary Feedwater Actuation Signal (AFAS) ability to open the valves, rendering both trains of Auxiliary Feed Water to the Steam Generators inoperable. The condition was subsequently recognized and the control switches were placed in 'AUTO' restoring both trains to operable. The duration of the condition was 3 minutes from start to finish. Reference Fort Calhoun Station Condition Report 2011-0839.
"This eight-hour notification is being made pursuant to 10 CFR 50.72(b)(3)(v)(B)."
The NRC Resident Inspector has been notified.
"On February 5, 2011, both trains of the Auxiliary Feed Water system were disabled while transitioning from Auxiliary Feed Water to Main Feed Water during plant start up. While performing OI-AFW-4 attachment 3, FW-6 Electric Driven AFW Pump Operations, both Steam Generator Auxiliary Feed Water inlet valves (HCV-1107A and HCV-1108A) control switches were placed in 'CLOSE'. This action defeated the Auxiliary Feedwater Actuation Signal (AFAS) ability to open the valves, rendering both trains of Auxiliary Feed Water to the Steam Generators inoperable. The condition was subsequently recognized and the control switches were placed in 'AUTO' restoring both trains to operable. The duration of the condition was 3 minutes from start to finish. Reference Fort Calhoun Station Condition Report 2011-0839.
"This eight-hour notification is being made pursuant to 10 CFR 50.72(b)(3)(v)(B)."
The NRC Resident Inspector has been notified.