Event Notification Report for September 17, 2001
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/16/2001 - 09/17/2001
EVENT NUMBERS
38291
Power Reactor
Event Number: 38291
Facility: CALLAWAY
Region: 4 State: MO
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: B. BREDMAN
HQ OPS Officer: JOHN MacKINNON
Region: 4 State: MO
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: B. BREDMAN
HQ OPS Officer: JOHN MacKINNON
Notification Date: 09/17/2001
Notification Time: 19:05 [ET]
Event Date: 09/17/2001
Event Time: 12:05 [CDT]
Last Update Date: 09/17/2001
Notification Time: 19:05 [ET]
Event Date: 09/17/2001
Event Time: 12:05 [CDT]
Last Update Date: 09/17/2001
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):
JOHN PELLET (R4)
JOHN PELLET (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
LOSS OF NON-SAFETY RELATED 125 VOLT DC BUS RESULTED IN BOTH MOTOR DRIVEN AUXILIARY FEEDWATER PUMPS STARTING.
During routine scheduled maintenance activities, power was lost to a non-safety related 125 volt DC bus. Loss of power to the bus resulted in loss of oil pressure indication on 1 of 2 channels on both main feedwater pumps, which in turn resulted in the actuation of both motor driven auxiliary feedwater pumps. The motor driven auxiliary feedwater pumps ran for approximately 3 minutes. Reactor power increased but no over power event occurred.
Power has been restored to the non-safety related 125 volt bus and the motor driven auxiliary feedwater pumps have been secured.
The licensee is looking into that maybe when cross connecting the 125 volt DC buses that one of the two fuse disconnect switches might have had a blown fuse which would have resulted in the above event.
The NRC Resident Inspector was notified of this event by the licensee.
During routine scheduled maintenance activities, power was lost to a non-safety related 125 volt DC bus. Loss of power to the bus resulted in loss of oil pressure indication on 1 of 2 channels on both main feedwater pumps, which in turn resulted in the actuation of both motor driven auxiliary feedwater pumps. The motor driven auxiliary feedwater pumps ran for approximately 3 minutes. Reactor power increased but no over power event occurred.
Power has been restored to the non-safety related 125 volt bus and the motor driven auxiliary feedwater pumps have been secured.
The licensee is looking into that maybe when cross connecting the 125 volt DC buses that one of the two fuse disconnect switches might have had a blown fuse which would have resulted in the above event.
The NRC Resident Inspector was notified of this event by the licensee.