Event Notification Report for July 20, 2002
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/19/2002 - 07/20/2002
EVENT NUMBERS
39079
Power Reactor
Event Number: 39079
Facility: CRYSTAL RIVER
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] B&W-L-LP
NRC Notified By: DAN DEBOER
HQ OPS Officer: RICH LAURA
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] B&W-L-LP
NRC Notified By: DAN DEBOER
HQ OPS Officer: RICH LAURA
Notification Date: 07/20/2002
Notification Time: 22:15 [ET]
Event Date: 07/20/2002
Event Time: 16:45 [EDT]
Last Update Date: 07/20/2002
Notification Time: 22:15 [ET]
Event Date: 07/20/2002
Event Time: 16:45 [EDT]
Last Update Date: 07/20/2002
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
10 CFR Section:
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
CHARLIE PAYNE (R2)
CHARLIE PAYNE (R2)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | N | Y | 100 | Power Operation | 100 | Power Operation |
AUTOMATIC EDG START DUE TO LOSS OF THE OFFSITE POWER TRANSFORMER
"On July 20, 2002 at 1645, the "A" Emergency Diesel Generator automatically actuated and powered the "A" 4160V Engineered Safeguards bus. This event is Reportable as an 8-Hour Notification per 10 CFR 50.72 (b) (3) (iv) (B) (8). The actuation occurred due to the loss of the Off-Site Power Transformer. The cause of the transformer loss has been identified to be a faulted cable between the Off-Site Power Transformer and the "A" 4160 V Engineered Safeguards bus."
The licensee reported the unit was entered into a 72 hour LCO action statement per TS 3..8.1.A. Corrective maintenance has been started to replace the cable within the specified TS AOT. The licensee reconfigured the electrical line-up and was able to secure the EDG.
"On July 20, 2002 at 1645, the "A" Emergency Diesel Generator automatically actuated and powered the "A" 4160V Engineered Safeguards bus. This event is Reportable as an 8-Hour Notification per 10 CFR 50.72 (b) (3) (iv) (B) (8). The actuation occurred due to the loss of the Off-Site Power Transformer. The cause of the transformer loss has been identified to be a faulted cable between the Off-Site Power Transformer and the "A" 4160 V Engineered Safeguards bus."
The licensee reported the unit was entered into a 72 hour LCO action statement per TS 3..8.1.A. Corrective maintenance has been started to replace the cable within the specified TS AOT. The licensee reconfigured the electrical line-up and was able to secure the EDG.