Event Notification Report for October 20, 2002
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/19/2002 - 10/20/2002
EVENT NUMBERS
39441
Power Reactor
Event Number: 39441
Facility: KEWAUNEE
Region: 3 State: WI
Unit: [1] [] []
RX Type: [1] W-2-LP
NRC Notified By: ANTHONY BOLYEN
HQ OPS Officer: ERIC THOMAS
Region: 3 State: WI
Unit: [1] [] []
RX Type: [1] W-2-LP
NRC Notified By: ANTHONY BOLYEN
HQ OPS Officer: ERIC THOMAS
Notification Date: 12/12/2002
Notification Time: 15:57 [ET]
Event Date: 10/20/2002
Event Time: 10:54 [CDT]
Last Update Date: 12/12/2002
Notification Time: 15:57 [ET]
Event Date: 10/20/2002
Event Time: 10:54 [CDT]
Last Update Date: 12/12/2002
Emergency Class: NON EMERGENCY
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
Person (Organization):
PATRICK HILAND (R3)
PATRICK HILAND (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
"INVALID AFW SYSTEM ACTUATION
"EVENT DESCRIPTION
"This report is being made in accordance with [10 CFR] 50.73(a)(1), which states, in part, 'In the case of an invalid actuation reported under [10 CFR] 50.73(a)(2)(iv), other than actuation of the reactor protection system (RPS) when the reactor is critical, the licensee may, at its option, provide a telephone notification to the NRC Operations Center within 60 days after discovery of the event instead of submitting a written LER.' This invalid actuation is being reported under [10 CFR] 50.73(a)(2)(iv)(A).
"NUREG-1022, Rev. 2, 'Event Reporting Guidelines 10CFR50.72 and 50.73 provides guidance for determining if an actuation is invalid. The NUREG states, in part, that invalid actuations include actuations that are not the result of valid signals and are not intentional manual actuations. Valid signals are those signals that are initiated in response to actual plant conditions or parameters satisfying the requirements for initiation of the safety function of the system. This report documents an actuation that was not the result of a valid signal and was not an intentional manual actuation. For these reasons, this event constitutes an invalid actuation.
"NUREG-1022, Rev. 2, states that the report should provide the following information:
- the specific train(s) and system(s) that were actuated,
- whether each train actuation was complete or partial, and
- whether or not the system started and functioned successfully.
"On October 20, 2002 at 1054 CDST, the Turbine Driven Auxiliary Feedwater (TDAFW) pump auto-started as a result of an invalid signal. Investigation into the event has shown that the steam supply valve to the TDAFW pump (MS-102) opened inadvertently, starting the TDAFW Pump. Control room annunciators and computer points alarmed. Steam generator blowdown valves closed, per design, as a result of the TDAFW pump start. The TDAFW pump was placed to pullout after verifying that there were no valid automatic start signals."
The NRC Resident Inspector will be notified.
"EVENT DESCRIPTION
"This report is being made in accordance with [10 CFR] 50.73(a)(1), which states, in part, 'In the case of an invalid actuation reported under [10 CFR] 50.73(a)(2)(iv), other than actuation of the reactor protection system (RPS) when the reactor is critical, the licensee may, at its option, provide a telephone notification to the NRC Operations Center within 60 days after discovery of the event instead of submitting a written LER.' This invalid actuation is being reported under [10 CFR] 50.73(a)(2)(iv)(A).
"NUREG-1022, Rev. 2, 'Event Reporting Guidelines 10CFR50.72 and 50.73 provides guidance for determining if an actuation is invalid. The NUREG states, in part, that invalid actuations include actuations that are not the result of valid signals and are not intentional manual actuations. Valid signals are those signals that are initiated in response to actual plant conditions or parameters satisfying the requirements for initiation of the safety function of the system. This report documents an actuation that was not the result of a valid signal and was not an intentional manual actuation. For these reasons, this event constitutes an invalid actuation.
"NUREG-1022, Rev. 2, states that the report should provide the following information:
- the specific train(s) and system(s) that were actuated,
- whether each train actuation was complete or partial, and
- whether or not the system started and functioned successfully.
"On October 20, 2002 at 1054 CDST, the Turbine Driven Auxiliary Feedwater (TDAFW) pump auto-started as a result of an invalid signal. Investigation into the event has shown that the steam supply valve to the TDAFW pump (MS-102) opened inadvertently, starting the TDAFW Pump. Control room annunciators and computer points alarmed. Steam generator blowdown valves closed, per design, as a result of the TDAFW pump start. The TDAFW pump was placed to pullout after verifying that there were no valid automatic start signals."
The NRC Resident Inspector will be notified.