Event Notification Report for July 10, 2015
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/09/2015 - 07/10/2015
EVENT NUMBERS
51221
Power Reactor
Event Number: 51221
Facility: CLINTON
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: VERLE CASTLE
HQ OPS Officer: DANIEL MILLS
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: VERLE CASTLE
HQ OPS Officer: DANIEL MILLS
Notification Date: 07/10/2015
Notification Time: 14:57 [ET]
Event Date: 07/10/2015
Event Time: 07:00 [CDT]
Last Update Date: 07/10/2015
Notification Time: 14:57 [ET]
Event Date: 07/10/2015
Event Time: 07:00 [CDT]
Last Update Date: 07/10/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
ANN MARIE STONE (R3DO)
ANN MARIE STONE (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
EMERGENCY SIREN OUT OF SERVICE
"At 0710 CDT on July 10, 2015, Exelon was notified by the siren vendor that siren CL27 experienced a communications failure during the daily test. Siren CL27 affects 33.9% of the Clinton EPZ population. The loss of communications represents more than 25% of the EPZ population and is therefore reportable under 10 CFR 50.72(b)(3)(xiii).
"The siren vendor is currently investigating to repair the issue.
"The DeWitt County Emergency Manager has been notified. DeWitt County has implemented the backup means of notification called 'Route Alerting' in lieu of siren communications. Route Alerting consists of vehicles and public address systems.
"The NRC Senior Resident has been notified.
"1300 - Siren returned to service."
"At 0710 CDT on July 10, 2015, Exelon was notified by the siren vendor that siren CL27 experienced a communications failure during the daily test. Siren CL27 affects 33.9% of the Clinton EPZ population. The loss of communications represents more than 25% of the EPZ population and is therefore reportable under 10 CFR 50.72(b)(3)(xiii).
"The siren vendor is currently investigating to repair the issue.
"The DeWitt County Emergency Manager has been notified. DeWitt County has implemented the backup means of notification called 'Route Alerting' in lieu of siren communications. Route Alerting consists of vehicles and public address systems.
"The NRC Senior Resident has been notified.
"1300 - Siren returned to service."