Event Notification Report for June 25, 2005
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/24/2005 - 06/25/2005
EVENT NUMBERS
41797
Power Reactor
Event Number: 41797
Facility: CLINTON
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: TOM CHALMERS
HQ OPS Officer: STEVE SANDIN
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: TOM CHALMERS
HQ OPS Officer: STEVE SANDIN
Notification Date: 06/26/2005
Notification Time: 01:03 [ET]
Event Date: 06/25/2005
Event Time: 20:42 [CDT]
Last Update Date: 06/26/2005
Notification Time: 01:03 [ET]
Event Date: 06/25/2005
Event Time: 20:42 [CDT]
Last Update Date: 06/26/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
BRUCE BURGESS (R3)
LANCE ENGLISH (email (TAS)
BRUCE BURGESS (R3)
LANCE ENGLISH (email (TAS)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 96 | Power Operation | 96 | Power Operation |
OFFSITE ASSISTANCE REQUESTED DUE TO SWITCHYARD CIRCUIT BREAKER FAILURE
"On June 25, 2005 at 2042, Clinton Power Station received indications of loss of the Reserve Auxiliary Transformer (RAT). Upon investigation, it was discovered that Gas Circuit Breaker (GCB) 4522 had suffered catastrophic failure resulting in a lockout of the North Bus, which supplies the RAT.
"Offsite assistance was requested, as a precautionary measure, from the Local Law Enforcement Agency, Medical, and Fire Departments. The onsite Operations Fire Brigade extinguished the fire in the GCB 4522.
"Clinton Power Station remained online at full electrical load during the event and is stable. Restoration and recovery is now in progress.
"The NRC Resident Inspector has been informed."
The licensee stated that local law enforcement (Dewitt County Sheriff) departed the site at 2130 CDT and that nothing of a suspicious nature was found. The incident is considered to be solely the result of a component failure.
"On June 25, 2005 at 2042, Clinton Power Station received indications of loss of the Reserve Auxiliary Transformer (RAT). Upon investigation, it was discovered that Gas Circuit Breaker (GCB) 4522 had suffered catastrophic failure resulting in a lockout of the North Bus, which supplies the RAT.
"Offsite assistance was requested, as a precautionary measure, from the Local Law Enforcement Agency, Medical, and Fire Departments. The onsite Operations Fire Brigade extinguished the fire in the GCB 4522.
"Clinton Power Station remained online at full electrical load during the event and is stable. Restoration and recovery is now in progress.
"The NRC Resident Inspector has been informed."
The licensee stated that local law enforcement (Dewitt County Sheriff) departed the site at 2130 CDT and that nothing of a suspicious nature was found. The incident is considered to be solely the result of a component failure.