Event Notification Report for May 25, 2008
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/24/2008 - 05/25/2008
EVENT NUMBERS
44240
Power Reactor
Event Number: 44240
Facility: HOPE CREEK
Region: 1 State: NJ
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: TOM FOWLER
HQ OPS Officer: PETE SNYDER
Region: 1 State: NJ
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: TOM FOWLER
HQ OPS Officer: PETE SNYDER
Notification Date: 05/25/2008
Notification Time: 09:50 [ET]
Event Date: 05/25/2008
Event Time: 09:30 [EDT]
Last Update Date: 05/25/2008
Notification Time: 09:50 [ET]
Event Date: 05/25/2008
Event Time: 09:30 [EDT]
Last Update Date: 05/25/2008
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(i) - PLANT S/D REQD BY TS
10 CFR Section:
50.72(b)(2)(i) - PLANT S/D REQD BY TS
Person (Organization):
MEL GRAY (R1)
MEL GRAY (R1)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 91 | Power Operation | 91 | Power Operation |
INVERTER FUSE FAILURE
"At 1835 on 5/24/08 CD482 inverter main power fuse failed. This inverter powers various vital ECCS channel 'C' analog instrumentation (including 'C' channel EDG start circuitry). The inverter transferred to the alternate AC power supply as designed with no abnormal plant response or transient. The main power fuse was replaced and attempts were made to place the inverter section back in service and return the inverter to the normal power supply. Logic card checks were performed as part of the normal restoration process prior to transferring to the inverter normal output. These checks could not be completed satisfactorily and indicate that there is an abnormal condition in the inverter section. The inverter, while on alternate AC, is not operable per technical specifications [TS] due to the loss of alternate AC on a LOOP/LOCA, which would prevent the 'C' EDG from starting. Additional safety related equipment that is unavailable include the 'D' Station Service Water Pump for a scheduled maintenance window. All other safety equipment is operable and functioned as required. No personnel were injured. Unit shutdown commenced at 0930 on 5/25/08 in accordance with TS 3.8.3.1. The unit is required to be in hot shutdown by 1435. This four-hour report is bring made in accordance with 10 CFR 50.72(b)(2)(i)."
The licensee notified the NRC Resident Inspector. The licensee will notify a local government agency.
* * * UPDATE FROM TOM FOWLER TO JOE O'HARA AT 1415 ON 5/25/08 * * *
The inverter logic power supply has been replaced, and the inverter has been tested satisfactorily. The inverter has been declared operable, and the licensee exited the technical specification required shutdown at 1217. Power ascension is in progress.
The licensee informed the NRC Resident Inspector, and the Lower Alloways Creek Township.
Notified R1DO(Gray)
"At 1835 on 5/24/08 CD482 inverter main power fuse failed. This inverter powers various vital ECCS channel 'C' analog instrumentation (including 'C' channel EDG start circuitry). The inverter transferred to the alternate AC power supply as designed with no abnormal plant response or transient. The main power fuse was replaced and attempts were made to place the inverter section back in service and return the inverter to the normal power supply. Logic card checks were performed as part of the normal restoration process prior to transferring to the inverter normal output. These checks could not be completed satisfactorily and indicate that there is an abnormal condition in the inverter section. The inverter, while on alternate AC, is not operable per technical specifications [TS] due to the loss of alternate AC on a LOOP/LOCA, which would prevent the 'C' EDG from starting. Additional safety related equipment that is unavailable include the 'D' Station Service Water Pump for a scheduled maintenance window. All other safety equipment is operable and functioned as required. No personnel were injured. Unit shutdown commenced at 0930 on 5/25/08 in accordance with TS 3.8.3.1. The unit is required to be in hot shutdown by 1435. This four-hour report is bring made in accordance with 10 CFR 50.72(b)(2)(i)."
The licensee notified the NRC Resident Inspector. The licensee will notify a local government agency.
* * * UPDATE FROM TOM FOWLER TO JOE O'HARA AT 1415 ON 5/25/08 * * *
The inverter logic power supply has been replaced, and the inverter has been tested satisfactorily. The inverter has been declared operable, and the licensee exited the technical specification required shutdown at 1217. Power ascension is in progress.
The licensee informed the NRC Resident Inspector, and the Lower Alloways Creek Township.
Notified R1DO(Gray)