Event Notification Report for July 06, 2012
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/05/2012 - 07/06/2012
Power Reactor
Event Number: 48073
Facility: CALVERT CLIFFS
Region: 1 State: MD
Unit: [1] [2] []
RX Type: [1] CE,[2] CE
NRC Notified By: JOE GIOFFRE
HQ OPS Officer: DONALD NORWOOD
Region: 1 State: MD
Unit: [1] [2] []
RX Type: [1] CE,[2] CE
NRC Notified By: JOE GIOFFRE
HQ OPS Officer: DONALD NORWOOD
Notification Date: 07/06/2012
Notification Time: 08:24 [ET]
Event Date: 07/06/2012
Event Time: 02:32 [EDT]
Last Update Date: 07/07/2012
Notification Time: 08:24 [ET]
Event Date: 07/06/2012
Event Time: 02:32 [EDT]
Last Update Date: 07/07/2012
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):
PAMELA HENDERSON (R1DO)
PAMELA HENDERSON (R1DO)
| 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 |
EMERGENCY RESPONSE DATA SYSTEM OUT OF SERVICE
"Calvert Cliffs Tech Support Computer power supply failed rendering the ERDS system incapable of transmitting data to the NRC. ERDS is out of service for both Unit-1 and Unit-2. Should an emergency be declared during this period, the Control Room will continue to have the capability to retrieve plant data inputs to assess plant conditions and perform core damage assessment. Control Room Emergency Response Organization personnel will use backup methods already captured in emergency response procedures to disseminate plant parameter data to the effected Emergency Response Facilities and NRC during the plant data network outage."
The licensee notified the NRC Resident Inspector.
* * * UPDATE FROM JOE GIOFFRE TO HOWIE CROUCH AT 1528 EDT ON 7/7/12 * * *
ERDS was returned to service at 1528 EDT after replacing the computer power supply. The licensee has notified the NRC Resident Inspector.
Notified R1DO (Henderson).
"Calvert Cliffs Tech Support Computer power supply failed rendering the ERDS system incapable of transmitting data to the NRC. ERDS is out of service for both Unit-1 and Unit-2. Should an emergency be declared during this period, the Control Room will continue to have the capability to retrieve plant data inputs to assess plant conditions and perform core damage assessment. Control Room Emergency Response Organization personnel will use backup methods already captured in emergency response procedures to disseminate plant parameter data to the effected Emergency Response Facilities and NRC during the plant data network outage."
The licensee notified the NRC Resident Inspector.
* * * UPDATE FROM JOE GIOFFRE TO HOWIE CROUCH AT 1528 EDT ON 7/7/12 * * *
ERDS was returned to service at 1528 EDT after replacing the computer power supply. The licensee has notified the NRC Resident Inspector.
Notified R1DO (Henderson).
Power Reactor
Event Number: 48074
Facility: SEQUOYAH
Region: 2 State: TN
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: TRACY SUDOKO
HQ OPS Officer: HOWIE CROUCH
Region: 2 State: TN
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: TRACY SUDOKO
HQ OPS Officer: HOWIE CROUCH
Notification Date: 07/06/2012
Notification Time: 13:04 [ET]
Event Date: 07/06/2012
Event Time: 10:12 [EDT]
Last Update Date: 07/06/2012
Notification Time: 13:04 [ET]
Event Date: 07/06/2012
Event Time: 10:12 [EDT]
Last Update Date: 07/06/2012
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):
BRIAN BONSER (R2DO)
BRIAN BONSER (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 |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
LOSS OF 21 OFFSITE SIRENS DUE TO INCLEMENT WEATHER
"At 1012 EDT on July 6, 2012, Tennessee Valley Authority (TVA) notified Tennessee Emergency Management Agency (TEMA) due to a loss of twenty-one (21) offsite sirens. Siren outages are believed to be from power supply failures caused by high winds resulting in downed trees last night. Efforts are in place to restore offsite sirens to service.
"A loss of 21 of the 108 offsite sirens does not constitute a significant degradation in the Alert and Notification System. (A loss of 32 sirens constitutes a significant degradation.)
"Both Sequoyah units remain at 100 percent power.
"NRC Resident Inspector has been notified."
"At 1012 EDT on July 6, 2012, Tennessee Valley Authority (TVA) notified Tennessee Emergency Management Agency (TEMA) due to a loss of twenty-one (21) offsite sirens. Siren outages are believed to be from power supply failures caused by high winds resulting in downed trees last night. Efforts are in place to restore offsite sirens to service.
"A loss of 21 of the 108 offsite sirens does not constitute a significant degradation in the Alert and Notification System. (A loss of 32 sirens constitutes a significant degradation.)
"Both Sequoyah units remain at 100 percent power.
"NRC Resident Inspector has been notified."
Power Reactor
Event Number: 48075
Facility: WATTS BAR
Region: 2 State: TN
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: PEDRO WILLIAMS, JR.
HQ OPS Officer: HOWIE CROUCH
Region: 2 State: TN
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: PEDRO WILLIAMS, JR.
HQ OPS Officer: HOWIE CROUCH
Notification Date: 07/06/2012
Notification Time: 13:55 [ET]
Event Date: 07/06/2012
Event Time: 10:12 [EDT]
Last Update Date: 07/06/2012
Notification Time: 13:55 [ET]
Event Date: 07/06/2012
Event Time: 10:12 [EDT]
Last Update Date: 07/06/2012
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):
BRIAN BONSER (R2DO)
BRIAN BONSER (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 |
LOSS OF 7 OFFSITE SIRENS DUE TO INCLEMENT WEATHER
"On the evening of July 5, 2012, a severe thunderstorm warning was issued by the National Weather Service for the Tennessee Valley Authority (TVA) area. These storms included wind and tree damage to the surrounding area.
"On the morning of July 6, 2012, TVA pulsed the sirens in the emergency response system by providing an electrical signal to each of the siren towers. It was determined there had been localized power outages and possible tree damage to 7 out of the total of 99 offsite sirens. While the number of sirens out does not meet the required notification, this data was given to the state for informational update. This information was provided to the Tennessee Emergency Management Agency (TEMA) at 1012 EDT. Due to the interaction with the state and local government agencies, this report is being made as a four hour notification under 10 CFR 50.72(b)(2)(xi).
"The sirens will be repaired as needed and returned to service. There were no plant events that required siren actuation, and all plant systems are operating as required.
"The NRC Senior Resident Inspector has been notified."
"On the evening of July 5, 2012, a severe thunderstorm warning was issued by the National Weather Service for the Tennessee Valley Authority (TVA) area. These storms included wind and tree damage to the surrounding area.
"On the morning of July 6, 2012, TVA pulsed the sirens in the emergency response system by providing an electrical signal to each of the siren towers. It was determined there had been localized power outages and possible tree damage to 7 out of the total of 99 offsite sirens. While the number of sirens out does not meet the required notification, this data was given to the state for informational update. This information was provided to the Tennessee Emergency Management Agency (TEMA) at 1012 EDT. Due to the interaction with the state and local government agencies, this report is being made as a four hour notification under 10 CFR 50.72(b)(2)(xi).
"The sirens will be repaired as needed and returned to service. There were no plant events that required siren actuation, and all plant systems are operating as required.
"The NRC Senior Resident Inspector has been notified."