Event Notification Report for July 04, 2011
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/03/2011 - 07/04/2011
EVENT NUMBERS
47021
Power Reactor
Event Number: 47021
Facility: WATTS BAR
Region: 2 State: TN
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: BILLY JOHNSON
HQ OPS Officer: CHARLES TEAL
Region: 2 State: TN
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: BILLY JOHNSON
HQ OPS Officer: CHARLES TEAL
Notification Date: 07/04/2011
Notification Time: 17:21 [ET]
Event Date: 07/04/2011
Event Time: 13:36 [EDT]
Last Update Date: 07/04/2011
Notification Time: 17:21 [ET]
Event Date: 07/04/2011
Event Time: 13:36 [EDT]
Last Update Date: 07/04/2011
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
MARK FRANKE (R2DO)
MARK FRANKE (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
OFFSITE NOTIFICATION DUE TO SPURIOUS SIREN ACTIVATION
"TVA received notification from Tennessee Emergency Management Agency (TEMA) at 1336 Eastern Daylight Saving Time (EDT) that Rhea County 911 operators had received several calls (approximately 6) regarding a siren sounding in north Rhea County.
"An electronic poll of the siren closest to the location of the reporting parties (Siren 43) indicated no response, although that siren did successfully respond to the 0700 daily poll on 7/4/2011. This may indicate that this siren is not operable.
"A severe thunderstorm warning had been issued by the National Weather Service for the time period this potential activation was reported. During this period there were several spurious acoustic monitor alarms from three additional sirens, although there were no other indications of siren activations (e.g., rotate or timer signals).
"A field investigation has been initiated, and the siren will be repaired as needed in accordance with TVA's corrective action program.
"There was no plant event that required siren actuation, and all plant systems are operating as required."
The licensee will notify the NRC Resident Inspector.
"TVA received notification from Tennessee Emergency Management Agency (TEMA) at 1336 Eastern Daylight Saving Time (EDT) that Rhea County 911 operators had received several calls (approximately 6) regarding a siren sounding in north Rhea County.
"An electronic poll of the siren closest to the location of the reporting parties (Siren 43) indicated no response, although that siren did successfully respond to the 0700 daily poll on 7/4/2011. This may indicate that this siren is not operable.
"A severe thunderstorm warning had been issued by the National Weather Service for the time period this potential activation was reported. During this period there were several spurious acoustic monitor alarms from three additional sirens, although there were no other indications of siren activations (e.g., rotate or timer signals).
"A field investigation has been initiated, and the siren will be repaired as needed in accordance with TVA's corrective action program.
"There was no plant event that required siren actuation, and all plant systems are operating as required."
The licensee will notify the NRC Resident Inspector.