Event Notification Report for November 16, 2005
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/15/2005 - 11/16/2005
Power Reactor
Event Number: 42143
Facility: COOPER
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: STEVE WHEELER
HQ OPS Officer: JOHN KNOKE
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: STEVE WHEELER
HQ OPS Officer: JOHN KNOKE
Notification Date: 11/16/2005
Notification Time: 09:17 [ET]
Event Date: 11/16/2005
Event Time: 04:22 [CST]
Last Update Date: 11/16/2005
Notification Time: 09:17 [ET]
Event Date: 11/16/2005
Event Time: 04:22 [CST]
Last Update Date: 11/16/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
JEFFREY CLARK (R4)
JEFFREY CLARK (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 |
INCORRECT READING OF HPCI POSITION INDICATING LIGHTS ON CONTROL ROOM PANEL.
"At 0422, during a panel tour in preparation for shift turnover, a Reactor Operator identified that both position indicating lights for HPCI-MO-19 were not illuminated. For current plant conditions the closed position indication should have been illuminated. The position indication for this valve is powered from 125 VDC, which also provides control power for the valve operation. Without control power, the valve would not open upon HPCI system initiation. HPCI was declared inoperable. Per the discussion in NUREG 1022, inoperability of a single train system is reportable as an 8 hour report. Per Technical Specifications, RCIC was verified to be operable immediately, and restoration of HPCI to an operable condition is required within 14 days."
The licensee indicated that the valve position was always in the correct posture although the panel light did not reflect it true position. This is a 14 day LCO.
The licensee notified the NRC Resident Inspector.
"At 0422, during a panel tour in preparation for shift turnover, a Reactor Operator identified that both position indicating lights for HPCI-MO-19 were not illuminated. For current plant conditions the closed position indication should have been illuminated. The position indication for this valve is powered from 125 VDC, which also provides control power for the valve operation. Without control power, the valve would not open upon HPCI system initiation. HPCI was declared inoperable. Per the discussion in NUREG 1022, inoperability of a single train system is reportable as an 8 hour report. Per Technical Specifications, RCIC was verified to be operable immediately, and restoration of HPCI to an operable condition is required within 14 days."
The licensee indicated that the valve position was always in the correct posture although the panel light did not reflect it true position. This is a 14 day LCO.
The licensee notified the NRC Resident Inspector.
Power Reactor
Event Number: 42146
Facility: WOLF CREEK
Region: 4 State: KS
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: STEVE GIFFORD
HQ OPS Officer: PETE SNYDER
Region: 4 State: KS
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: STEVE GIFFORD
HQ OPS Officer: PETE SNYDER
Notification Date: 11/16/2005
Notification Time: 18:56 [ET]
Event Date: 11/16/2005
Event Time: 15:30 [CST]
Last Update Date: 11/16/2005
Notification Time: 18:56 [ET]
Event Date: 11/16/2005
Event Time: 15:30 [CST]
Last Update Date: 11/16/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION
Person (Organization):
JEFFREY CLARK (R4)
JEFFREY CLARK (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 |
POTENTIAL FAILURE TO MEET REQUIRED RESPONSE TIMES FOR SHUTDOWN OUTSIDE CONTROL ROOM
"After a timed walk down of an Off Normal Operations procedure for shut down outside the Control Room, it appears that required response times were not met. This is due to a new assumption that all actions would not function due to plant configuration. Some valve circuits are not protected with a second fuse that is isolated from the control room portion of the circuitry. The only fuse in the circuit may blow during the early part of the event, prior to manipulating the isolation switch on the breaker. Since the fuse could blow, there would be no control power to electrically manipulate the valve and that would cause the operator to go to the 'Response not Obtained' column adding time to the actions taken.
"This issue was previously identified at Wolf Creek in 1985 in IE INFORMATION NOTICE NO. 85-09. However, additional research needs to be accomplished as to why some circuits have only one fuse.
"Compensatory actions include:
"1) A change to the procedure to direct additional actions.
"2) An hourly fire watch has been added to the control room."
The licensee notified the NRC Resident Inspector.
"After a timed walk down of an Off Normal Operations procedure for shut down outside the Control Room, it appears that required response times were not met. This is due to a new assumption that all actions would not function due to plant configuration. Some valve circuits are not protected with a second fuse that is isolated from the control room portion of the circuitry. The only fuse in the circuit may blow during the early part of the event, prior to manipulating the isolation switch on the breaker. Since the fuse could blow, there would be no control power to electrically manipulate the valve and that would cause the operator to go to the 'Response not Obtained' column adding time to the actions taken.
"This issue was previously identified at Wolf Creek in 1985 in IE INFORMATION NOTICE NO. 85-09. However, additional research needs to be accomplished as to why some circuits have only one fuse.
"Compensatory actions include:
"1) A change to the procedure to direct additional actions.
"2) An hourly fire watch has been added to the control room."
The licensee notified the NRC Resident Inspector.