Event Notification Report for December 09, 2013
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/08/2013 - 12/09/2013
Power Reactor
Event Number: 49618
Facility: ARKANSAS NUCLEAR
Region: 4 State: AR
Unit: [] [2] []
RX Type: [1] B&W-L-LP,[2] CE
NRC Notified By: DAN BREEDLOVE
HQ OPS Officer: JEFF ROTTON
Region: 4 State: AR
Unit: [] [2] []
RX Type: [1] B&W-L-LP,[2] CE
NRC Notified By: DAN BREEDLOVE
HQ OPS Officer: JEFF ROTTON
Notification Date: 12/09/2013
Notification Time: 09:20 [ET]
Event Date: 12/09/2013
Event Time: 08:00 [CST]
Last Update Date: 12/09/2013
Notification Time: 09:20 [ET]
Event Date: 12/09/2013
Event Time: 08:00 [CST]
Last Update Date: 12/09/2013
Emergency Class: UNUSUAL EVENT
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(2)(xi) - OFFSITE NOTIFICATION 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(2)(xi) - OFFSITE NOTIFICATION 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
MICHAEL VASQUEZ (R4DO)
MARK DAPAS (R4RA)
DAN DORMAN (NRR)
SCOTT MORRIS (IRD)
MARK KING (NRR)
MICHAEL VASQUEZ (R4DO)
MARK DAPAS (R4RA)
DAN DORMAN (NRR)
SCOTT MORRIS (IRD)
MARK KING (NRR)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | A/R | Y | 100 | Power Operation | 0 | Hot Standby |
UNUSUAL EVENT DECLARED DUE TO UNIT 2 AUXILIARY TRANSFORMER EXPLOSION
"At approximately 0748 [CST] on 12/9/2013, an electrical fault occurred resulting in a fire and explosion on the ANO [Arkansas Nuclear One] Unit 2 Unit Auxiliary Transformer. This caused a unit trip and a loss of power to Startup 3 Transformer, which is one of the two offsite power feeds to ANO Unit 2. ANO Unit 2 is currently in a stable shutdown condition. With Startup 3 and Unit Aux Transformer unavailable, power was lost to the Reactor Coolant Pumps and Circulating Water Pumps. RCS [Reactor Coolant System] natural circulation is in progress removing core decay heat. Emergency Feedwater actuated due to low steam generator levels and is supplying both steam generators. The unit is steaming to the atmosphere. 2A-1 and 2A-3 are powered from SU [Startup] 2 Transformer. 2A-4 is powered from 2K-4B Emergency Diesel Generator.
"ANO Unit 1 is currently operating at 98% power. The auto transformer tripped off line with the fault in ANO Unit 2 Unit Auxiliary Transformer. This has caused Startup Transformer 1 to be inoperable. This places ANO Unit 1 in a 72 hour Technical Specification action statement (T.S 3.6.1 for Loss of the SU-1 Transformer).
"No significant injuries were reported as a result of this condition and offsite agencies have been notified.
"At 0800 on 12/9/2013 Unit 2 declared a Notification of Unusual Event based on EAL HU4 Fire or Explosion inside Protected Area not extinguished in 15 minutes.
"At 0917 on 12/9/2013, the fire on Unit 2 Unit Auxiliary Transformer is OUT."
The Licensee notified the NRC Resident Inspector.
Notified DHS SWO, DOE Ops Center, FEMA Ops Center, HHS Ops Center, NICC Watch Officer, USDA Ops Center, EPA EOC, and Nuclear SSA vial email.
* * * UPDATE FROM DAN BREEDLOVE TO VINCE KLCO AT 1336 EST ON 12/9/2013 * * *
At 1215 CST, ANO terminated from the Unusual Event as per HU4 stable plant conditions.
ANO Unit 2 is stable and will be cooled down to Mode 5 via natural circulation and decay heat is being removed via emergency feedwater and downstream dump valves to atmosphere. There is no radiological release and no personnel injuries.
The licensee has notified the NRC Resident Inspector, Arkansas Department of Emergency Management, Arkansas Department of Health, and other local authorities.
Notified R4DO (Vasquez), NRR EO (King) and IRC MOC (Morris).
Notified DHS SWO, DOE Ops Center, FEMA Ops Center, HHS Ops Center, NICC Watch Officer, USDA Ops Center, EPA EOC, and Nuclear SSA vial email.
* * * UPDATE FROM ALBERT MARTIN TO VINCE KLCO AT 1812 EST ON 12/9/2013 * * *
"Outside agencies (National Response Center, Arkansas Department of Emergency Management, Corps of Engineers, and U.S. Coast Guard) were contacted due to a minor unknown amount of oil that entered the plant discharge to Lake Dardanelle. The oil was from the faulted Unit 2 Unit Auxiliary Transformer. The majority of oil was contained within the containment around the transformer or the oily water separator it drains to. Local inspection revealed only a small amount of what was released actually passed the containment booms that are continuously in place on the discharge canal. The oil boom was verified to be in good condition. The oil was verified to be mineral oil. The release was verified to be terminated. An additional oil boom was deployed. Reference [ANO] Condition Report CR-ANO-C-2013-03071."
The licensee notified the NRC Resident Inspector.
Notified the R4DO (Werner)
"At approximately 0748 [CST] on 12/9/2013, an electrical fault occurred resulting in a fire and explosion on the ANO [Arkansas Nuclear One] Unit 2 Unit Auxiliary Transformer. This caused a unit trip and a loss of power to Startup 3 Transformer, which is one of the two offsite power feeds to ANO Unit 2. ANO Unit 2 is currently in a stable shutdown condition. With Startup 3 and Unit Aux Transformer unavailable, power was lost to the Reactor Coolant Pumps and Circulating Water Pumps. RCS [Reactor Coolant System] natural circulation is in progress removing core decay heat. Emergency Feedwater actuated due to low steam generator levels and is supplying both steam generators. The unit is steaming to the atmosphere. 2A-1 and 2A-3 are powered from SU [Startup] 2 Transformer. 2A-4 is powered from 2K-4B Emergency Diesel Generator.
"ANO Unit 1 is currently operating at 98% power. The auto transformer tripped off line with the fault in ANO Unit 2 Unit Auxiliary Transformer. This has caused Startup Transformer 1 to be inoperable. This places ANO Unit 1 in a 72 hour Technical Specification action statement (T.S 3.6.1 for Loss of the SU-1 Transformer).
"No significant injuries were reported as a result of this condition and offsite agencies have been notified.
"At 0800 on 12/9/2013 Unit 2 declared a Notification of Unusual Event based on EAL HU4 Fire or Explosion inside Protected Area not extinguished in 15 minutes.
"At 0917 on 12/9/2013, the fire on Unit 2 Unit Auxiliary Transformer is OUT."
The Licensee notified the NRC Resident Inspector.
Notified DHS SWO, DOE Ops Center, FEMA Ops Center, HHS Ops Center, NICC Watch Officer, USDA Ops Center, EPA EOC, and Nuclear SSA vial email.
* * * UPDATE FROM DAN BREEDLOVE TO VINCE KLCO AT 1336 EST ON 12/9/2013 * * *
At 1215 CST, ANO terminated from the Unusual Event as per HU4 stable plant conditions.
ANO Unit 2 is stable and will be cooled down to Mode 5 via natural circulation and decay heat is being removed via emergency feedwater and downstream dump valves to atmosphere. There is no radiological release and no personnel injuries.
The licensee has notified the NRC Resident Inspector, Arkansas Department of Emergency Management, Arkansas Department of Health, and other local authorities.
Notified R4DO (Vasquez), NRR EO (King) and IRC MOC (Morris).
Notified DHS SWO, DOE Ops Center, FEMA Ops Center, HHS Ops Center, NICC Watch Officer, USDA Ops Center, EPA EOC, and Nuclear SSA vial email.
* * * UPDATE FROM ALBERT MARTIN TO VINCE KLCO AT 1812 EST ON 12/9/2013 * * *
"Outside agencies (National Response Center, Arkansas Department of Emergency Management, Corps of Engineers, and U.S. Coast Guard) were contacted due to a minor unknown amount of oil that entered the plant discharge to Lake Dardanelle. The oil was from the faulted Unit 2 Unit Auxiliary Transformer. The majority of oil was contained within the containment around the transformer or the oily water separator it drains to. Local inspection revealed only a small amount of what was released actually passed the containment booms that are continuously in place on the discharge canal. The oil boom was verified to be in good condition. The oil was verified to be mineral oil. The release was verified to be terminated. An additional oil boom was deployed. Reference [ANO] Condition Report CR-ANO-C-2013-03071."
The licensee notified the NRC Resident Inspector.
Notified the R4DO (Werner)
Power Reactor
Event Number: 49619
Facility: FARLEY
Region: 2 State: AL
Unit: [1] [] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: JOHN ANDREWS
HQ OPS Officer: DONALD NORWOOD
Region: 2 State: AL
Unit: [1] [] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: JOHN ANDREWS
HQ OPS Officer: DONALD NORWOOD
Notification Date: 12/09/2013
Notification Time: 10:19 [ET]
Event Date: 12/09/2013
Event Time: 09:06 [CST]
Last Update Date: 12/09/2013
Notification Time: 10:19 [ET]
Event Date: 12/09/2013
Event Time: 09:06 [CST]
Last Update Date: 12/09/2013
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):
ANTHONY MASTERS (R2DO)
ANTHONY MASTERS (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 |
SMOKE DETECTION PANEL REMOVED FROM SERVICE FOR PLANNED MAINTENANCE
"At 0906 CST on December 9, 2013, the Unit 1 pyro panel (smoke detection panel) was removed from service for planned repairs. The pyro panel is expected to be out of service for approximately 8 hours. Viable compensatory measures have been established for all affected areas except the Unit 1 Containment Building. Since a fire in Containment is an entry condition for the site's Emergency Plan, this is considered a loss of emergency assessment capability and is being reported per 10CFR50.72(b)(3)(xiii). Containment temperatures are being monitored while the pyro panel is out of service, however this is not considered a satisfactory compensatory measure for maintaining an effective assessment capability.
"A follow-up notification will be provided upon restoration of Containment Building smoke detection capability.
"The NRC Resident Inspector has been notified."
* * * UPDATE FROM JOHN ANDREWS TO JOHN SHOEMAKER AT 1345 EST ON 12/9/13 * * *
"The Unit 1 pyro panel (smoke detection panel) has been returned to service after planned repairs. The loss of emergency assessment capability reported per 10CFR50.72(b)(3)(xiii) has been restored. The NRC Resident [Inspector] will be notified of the update."
Notified R2DO (Masters).
"At 0906 CST on December 9, 2013, the Unit 1 pyro panel (smoke detection panel) was removed from service for planned repairs. The pyro panel is expected to be out of service for approximately 8 hours. Viable compensatory measures have been established for all affected areas except the Unit 1 Containment Building. Since a fire in Containment is an entry condition for the site's Emergency Plan, this is considered a loss of emergency assessment capability and is being reported per 10CFR50.72(b)(3)(xiii). Containment temperatures are being monitored while the pyro panel is out of service, however this is not considered a satisfactory compensatory measure for maintaining an effective assessment capability.
"A follow-up notification will be provided upon restoration of Containment Building smoke detection capability.
"The NRC Resident Inspector has been notified."
* * * UPDATE FROM JOHN ANDREWS TO JOHN SHOEMAKER AT 1345 EST ON 12/9/13 * * *
"The Unit 1 pyro panel (smoke detection panel) has been returned to service after planned repairs. The loss of emergency assessment capability reported per 10CFR50.72(b)(3)(xiii) has been restored. The NRC Resident [Inspector] will be notified of the update."
Notified R2DO (Masters).