Event Notification Report for June 22, 2006
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/21/2006 - 06/22/2006
EVENT NUMBERS
42660
Power Reactor
Event Number: 42660
Facility: SEABROOK
Region: 1 State: NH
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: DENNIS BEMIS
HQ OPS Officer: BILL HUFFMAN
Region: 1 State: NH
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: DENNIS BEMIS
HQ OPS Officer: BILL HUFFMAN
Notification Date: 06/22/2006
Notification Time: 14:28 [ET]
Event Date: 06/22/2006
Event Time: 06:20 [EDT]
Last Update Date: 06/22/2006
Notification Time: 14:28 [ET]
Event Date: 06/22/2006
Event Time: 06:20 [EDT]
Last Update Date: 06/22/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
MARVIN SYKES (R1)
MARVIN SYKES (R1)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
24 HOUR LICENSE CONDITION REPORT OF OPERATION IN A CONDITION PROHIBITED BY TECHNICAL SPECIFICATION
"At 0620 today, FPL Energy Seabrook discovered that the plant was in it condition prohibited by the technical specifications. At approximately 1900 yesterday, June 21, one of the two train-B vital battery chargers was removed from service, rendering the charger inoperable. This condition went unrecognized until 0620 this morning (June 22). Seabrook Station Technical Specification 3.8.2.1 permits two hours to restore a battery charger to operable status, otherwise, the plant must shutdown to hot standby within the next 6 hours and cold shutdown within the following 30 hours. In this event, the train-B full-capacity battery charger was inoperable for approximately 12.5 hours, exceeding the time permitted by the technical specifications. During the period the charger was inoperable, the redundant battery charger in train B and both train-A battery chargers remained in service and operable. This notification is being made as a 24-hour report in accordance with license condition 2.G of the Seabrook Station operating license."
Investigation into the circumstances of the event are ongoing. The normal battery charger had been removed from service for normal maintenance and testing. A backup battery charger was placed on the battery which permitted the licensee to continue normal plant operations without entering the two hour TS LCO for 3.8.2.1. During the maintenance and testing of the primary battery charger, the backup battery charger was also rendered inoperable resulting in no battery charger for the affected battery bank. The licensee stated that at 0726 EDT on 6/22/06, the battery charger was restored to service and the technical specification exited.
The licensee notified the NRC Resident Inspector.
"At 0620 today, FPL Energy Seabrook discovered that the plant was in it condition prohibited by the technical specifications. At approximately 1900 yesterday, June 21, one of the two train-B vital battery chargers was removed from service, rendering the charger inoperable. This condition went unrecognized until 0620 this morning (June 22). Seabrook Station Technical Specification 3.8.2.1 permits two hours to restore a battery charger to operable status, otherwise, the plant must shutdown to hot standby within the next 6 hours and cold shutdown within the following 30 hours. In this event, the train-B full-capacity battery charger was inoperable for approximately 12.5 hours, exceeding the time permitted by the technical specifications. During the period the charger was inoperable, the redundant battery charger in train B and both train-A battery chargers remained in service and operable. This notification is being made as a 24-hour report in accordance with license condition 2.G of the Seabrook Station operating license."
Investigation into the circumstances of the event are ongoing. The normal battery charger had been removed from service for normal maintenance and testing. A backup battery charger was placed on the battery which permitted the licensee to continue normal plant operations without entering the two hour TS LCO for 3.8.2.1. During the maintenance and testing of the primary battery charger, the backup battery charger was also rendered inoperable resulting in no battery charger for the affected battery bank. The licensee stated that at 0726 EDT on 6/22/06, the battery charger was restored to service and the technical specification exited.
The licensee notified the NRC Resident Inspector.