Event Notification Report for August 31, 2010
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/30/2010 - 08/31/2010
Power Reactor
Event Number: 46218
Facility: CLINTON
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: MARK DODDS
HQ OPS Officer: HOWIE CROUCH
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: MARK DODDS
HQ OPS Officer: HOWIE CROUCH
Notification Date: 08/31/2010
Notification Time: 17:45 [ET]
Event Date: 08/31/2010
Event Time: 11:12 [CDT]
Last Update Date: 08/31/2010
Notification Time: 17:45 [ET]
Event Date: 08/31/2010
Event Time: 11:12 [CDT]
Last Update Date: 08/31/2010
Emergency Class: NON EMERGENCY
10 CFR Section:
26.719 - FITNESS FOR DUTY
10 CFR Section:
26.719 - FITNESS FOR DUTY
Person (Organization):
TAMARA BLOOMER (R3DO)
TAMARA BLOOMER (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 97 | Power Operation | 97 | Power Operation |
FITNESS FOR DUTY REPORT - DISCOVERY OF A POTENTIAL PROHIBITED SUBSTANCE IN THE PROTECTED AREA
The licensee discovered a potential prohibited substance in the protected area. The substance has been removed from the facility. The licensee has notified the NRC Resident Inspector, the Illinois Emergency Management Agency and the DeWitt County Sheriff Office. Contact the Headquarters Operations Officer for additional details.
The licensee discovered a potential prohibited substance in the protected area. The substance has been removed from the facility. The licensee has notified the NRC Resident Inspector, the Illinois Emergency Management Agency and the DeWitt County Sheriff Office. Contact the Headquarters Operations Officer for additional details.
Power Reactor
Event Number: 46367
Facility: COOPER
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: DAVID NELSON MADSEN
HQ OPS Officer: DONG HWA PARK
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: DAVID NELSON MADSEN
HQ OPS Officer: DONG HWA PARK
Notification Date: 10/27/2010
Notification Time: 16:39 [ET]
Event Date: 08/31/2010
Event Time: 17:37 [CDT]
Last Update Date: 10/27/2010
Notification Time: 16:39 [ET]
Event Date: 08/31/2010
Event Time: 17:37 [CDT]
Last Update Date: 10/27/2010
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):
DAVID PROULX (R4DO)
DAVID PROULX (R4DO)
| 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 PRIMARY CONTAINMENT ISOLATION SYSTEM ACTUATION DUE TO A VOLTAGE TRANSIENT
"This telephone report is being made in accordance with 10 CFR 50.73(a)(2)(iv)(A) as an event or condition caused by an invalid signal that resulted in an automatic Group 6 isolation. On August 31, 2010 at 1737 CDT, Group 6 of Primary Containment Isolation System (PCIS) actuated. This resulted in completion of Secondary Containment isolation, initiation of the Standby Gas Treatment System and Control Room Emergency Filtration System. An invalid signal occurred apparently as a result of a voltage transient on the Nebraska City 345kV line. This was from a 3-phase fault to ground due to a structural failure during a severe thunder storm with high winds.
"The equipment associated with the Group 6 isolation functioned successfully and the isolation was complete. The Group 6 PCIS was reset. Cooper Nuclear Station operators reviewed the parameters that would cause a Group 6 trip signal (i.e. reactor water level, drywell pressure, reactor building radiation) and determined there were no valid conditions that would have caused the isolation.
"This event was most likely due an act of nature, thus no corrective actions were required."
The NRC Resident Inspector will be notified.
"This telephone report is being made in accordance with 10 CFR 50.73(a)(2)(iv)(A) as an event or condition caused by an invalid signal that resulted in an automatic Group 6 isolation. On August 31, 2010 at 1737 CDT, Group 6 of Primary Containment Isolation System (PCIS) actuated. This resulted in completion of Secondary Containment isolation, initiation of the Standby Gas Treatment System and Control Room Emergency Filtration System. An invalid signal occurred apparently as a result of a voltage transient on the Nebraska City 345kV line. This was from a 3-phase fault to ground due to a structural failure during a severe thunder storm with high winds.
"The equipment associated with the Group 6 isolation functioned successfully and the isolation was complete. The Group 6 PCIS was reset. Cooper Nuclear Station operators reviewed the parameters that would cause a Group 6 trip signal (i.e. reactor water level, drywell pressure, reactor building radiation) and determined there were no valid conditions that would have caused the isolation.
"This event was most likely due an act of nature, thus no corrective actions were required."
The NRC Resident Inspector will be notified.