Event Notification Report for December 04, 2007
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/03/2007 - 12/04/2007
EVENT NUMBERS
43824
Power Reactor
Event Number: 43824
Facility: PALO VERDE
Region: 4 State: AZ
Unit: [1] [2] [3]
RX Type: [1] CE,[2] CE,[3] CE
NRC Notified By: DANIEL HAUTALA
HQ OPS Officer: JOE O'HARA
Region: 4 State: AZ
Unit: [1] [2] [3]
RX Type: [1] CE,[2] CE,[3] CE
NRC Notified By: DANIEL HAUTALA
HQ OPS Officer: JOE O'HARA
Notification Date: 12/04/2007
Notification Time: 16:06 [ET]
Event Date: 12/04/2007
Event Time: 07:00 [MST]
Last Update Date: 12/04/2007
Notification Time: 16:06 [ET]
Event Date: 12/04/2007
Event Time: 07:00 [MST]
Last Update Date: 12/04/2007
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION 50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION 50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
MICHAEL HAY (R4)
MICHAEL HAY (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 |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
| 3 | N | N | 0 | Refueling | 0 | Refueling |
OFFSITE NOTIFICATION DUE TO POTENTIAL LOSS OF THREE SIRENS
"The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
"On December 04, 2007 at approximately 07:00 Mountain Standard Time (MST), the Palo Verde Emergency Preparedness Department discovered sirens 17, 18 and 23 out of service. Siren #23 was restored to service at 09:34 and siren 18 was restored to service at 10:32. Siren 17 remains out of service and is estimated to impact approximately 206 members of population in the emergency planning zone (EPZ) within 5 miles. Palo Verde's reporting criterion is a loss of capability to inform greater than 5% of the population within 5 miles. This call is being placed due to the relatively large segment of the population affected [10 CFR 50.72(b)(3)(xiii)]. During an event, the Palo Verde Emergency Plan has a contingency for dispatching Maricopa County Sheriff's Office (MCSO) vehicles with loud speakers to alert persons within the affected areas when sirens are inoperable. In order to activate this contingency, Maricopa County Department of Emergency Management was notified of the failed siren at 12:58 [10 CFR 50.72(b)(2)(xi)].
"There are no events in progress that require siren operation.
"The NRC Resident Inspector has been notified of the siren 17 being out of service and this ENS call."
The utility received a pulse check report at 0700 this morning which indicated that three sirens failed the initial pulse check. After the second pulse check, two of the three sirens responded correctly. However, the third siren (No. 17) remained OSS, and the licensee has dispatched a crew to repair it.
"The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
"On December 04, 2007 at approximately 07:00 Mountain Standard Time (MST), the Palo Verde Emergency Preparedness Department discovered sirens 17, 18 and 23 out of service. Siren #23 was restored to service at 09:34 and siren 18 was restored to service at 10:32. Siren 17 remains out of service and is estimated to impact approximately 206 members of population in the emergency planning zone (EPZ) within 5 miles. Palo Verde's reporting criterion is a loss of capability to inform greater than 5% of the population within 5 miles. This call is being placed due to the relatively large segment of the population affected [10 CFR 50.72(b)(3)(xiii)]. During an event, the Palo Verde Emergency Plan has a contingency for dispatching Maricopa County Sheriff's Office (MCSO) vehicles with loud speakers to alert persons within the affected areas when sirens are inoperable. In order to activate this contingency, Maricopa County Department of Emergency Management was notified of the failed siren at 12:58 [10 CFR 50.72(b)(2)(xi)].
"There are no events in progress that require siren operation.
"The NRC Resident Inspector has been notified of the siren 17 being out of service and this ENS call."
The utility received a pulse check report at 0700 this morning which indicated that three sirens failed the initial pulse check. After the second pulse check, two of the three sirens responded correctly. However, the third siren (No. 17) remained OSS, and the licensee has dispatched a crew to repair it.