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At approximately 0715 (CDT) on 7/1/2014, d … At approximately 0715 (CDT) on 7/1/2014, during the daily morning test, Braidwood Generating Station experienced Offsite Alert and Notification System (ANS) failure of sirens BD10 and BD13 due to a loss of power to the sirens. Loss of power to the sirens was due to the adverse weather conditions experienced on the evening of 6/30/2014. Siren BD10 provides coverage for 20% of Braidwood's Emergency Planning Zone (EPZ) population and siren BD13 provides coverage for 14.1% of the Braidwood EPZ population.</br>This event is being reported in accordance with 10CFR50.72(b)(3)(viii) for 'any event that results in a major loss of emergency assessment capability, offsite response capability, or offsite communications capability (e.g., significant portion of control room indication, Emergency Notification System, or offsite notification system).' The failure of the sirens resulted in the loss of the capability to alert a large segment of the population in the EPZ (~34%) for more than 1 hour. Per NEI 13-01, Rev 0, a large segment of the population in the EPZ should be taken to mean</br>approximately 25% of the total EPZ population.</br>Immediate actions taken included placing a portable generator online to restore siren BD10 at 1015 CDT on 7/1/2014. ComEd is currently in the area attempting to restore normal power. Proposed long term corrective actions including an upgrade to the sirens to contain a battery backup are being evaluated.</br>The licensee has notified the NRC Resident Inspector. The county emergency managers (for Will County - (for siren) BD10 and Grundy County - (for siren) BD13) are aware of the siren outage and the requirements to initiate mobile route alerting (FEMA approved backup) if required.</br>* * * UPDATE FROM MURTAZA ABBAS TO DANIEL MILLS AT 1756 EDT ON 07/02/2014 * * *</br>Siren BD10 was restored to functional on 7/1/2014 at 1130 CDT.</br>Siren BD13 was restored to functional on 7/2/2014 at 1145 CDT.</br>The NRC Resident Inspector has been notified of this ENS update.</br>Notified R3DO (McCraw)of this ENS update.
Notified R3DO (McCraw)
12:15:00, 1 July 2014 +
50,247 +
12:14:00, 1 July 2014 +
12:15:00, 1 July 2014 +
At approximately 0715 (CDT) on 7/1/2014, d … At approximately 0715 (CDT) on 7/1/2014, during the daily morning test, Braidwood Generating Station experienced Offsite Alert and Notification System (ANS) failure of sirens BD10 and BD13 due to a loss of power to the sirens. Loss of power to the sirens was due to the adverse weather conditions experienced on the evening of 6/30/2014. Siren BD10 provides coverage for 20% of Braidwood's Emergency Planning Zone (EPZ) population and siren BD13 provides coverage for 14.1% of the Braidwood EPZ population.</br>This event is being reported in accordance with 10CFR50.72(b)(3)(viii) for 'any event that results in a major loss of emergency assessment capability, offsite response capability, or offsite communications capability (e.g., significant portion of control room indication, Emergency Notification System, or offsite notification system).' The failure of the sirens resulted in the loss of the capability to alert a large segment of the population in the EPZ (~34%) for more than 1 hour. Per NEI 13-01, Rev 0, a large segment of the population in the EPZ should be taken to mean</br>approximately 25% of the total EPZ population.</br>Immediate actions taken included placing a portable generator online to restore siren BD10 at 1015 CDT on 7/1/2014. ComEd is currently in the area attempting to restore normal power. Proposed long term corrective actions including an upgrade to the sirens to contain a battery backup are being evaluated.</br>The licensee has notified the NRC Resident Inspector. The county emergency managers (for Will County - (for siren) BD10 and Grundy County - (for siren) BD13) are aware of the siren outage and the requirements to initiate mobile route alerting (FEMA approved backup) if required.</br>* * * UPDATE FROM MURTAZA ABBAS TO DANIEL MILLS AT 1756 EDT ON 07/02/2014 * * *</br>Siren BD10 was restored to functional on 7/1/2014 at 1130 CDT.</br>Siren BD13 was restored to functional on 7/2/2014 at 1145 CDT.</br>The NRC Resident Inspector has been notified of this ENS update.</br>Notified R3DO (McCraw)of this ENS update.
Notified R3DO (McCraw)
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