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Category:NRC Preliminary Notification of Event/Occurrence
MONTHYEARPNO-IV-13-004, A: Entergy, Update Arkansas Nuclear One, Unit 2, Fire in Auxiliary Transformer2013-12-10010 December 2013
PNO-IV-13-004A: Entergy, Update Arkansas Nuclear One, Unit 2, Fire in Auxiliary Transformer
ML13343A2452013-12-0909 December 2013
PNO-IV-13-004 Arkansas Nuclear One, Unit 2, Notification of Unusual Event
PNO-IV-13-002, C Update Arkansas Nuclear One, Unit 1, Return to Power Operation2013-08-0808 August 2013
PNO-IV-13-002C Update Arkansas Nuclear One, Unit 1, Return to Power Operation
ML13121A2732013-04-30030 April 2013
PNO-IV-13-002B Update: Arkansas Nuclear One Unit 2 Reactor Trip and Notification of Unusual Event
ML13099A2442013-04-0909 April 2013
PNO-IV-13-002A Update - Augmented Inspection Team Onsite at Arkansas Nuclear One
ML13092A0242013-04-0202 April 2013
PNO-IV-13-002 Arkansas Nuclear One, Unit 2, Notification of Unusual Event
PNO-IV-10-003, A: Update - Arkansas Nuclear One, Unit 2 Technical Specification Required Reactor Shutdown2010-09-0707 September 2010
PNO-IV-10-003A: Update - Arkansas Nuclear One, Unit 2 Technical Specification Required Reactor Shutdown
ML1023900442010-08-24024 August 2010
PNO-IV-10-003 Arkansas Nuclear One, Unit 2 Technical Specification Required Reactor Shutdown
PNO-IV-09-001, A, Entergy Operating, Inc., Arkansas Nuclear One - Unit 1, Trip and Fire Associated with Main Generator2009-02-10010 February 2009
PNO-IV-09-001A, Entergy Operating, Inc., Arkansas Nuclear One - Unit 1, Trip and Fire Associated with Main Generator
ML0904005792009-02-0909 February 2009
PNO-IV-09-001 - Entergy Operating, Inc., Arkansas, Unit 1 Trip and Fire Associated with Main Generator
PNO-IV-07-009, Entergy Operations, Inc., Arkansas Nuclear One, Alert at Arkansas Nuclear One, Unit 2, 10/24/20072007-10-24024 October 2007
PNO-IV-07-009 - Entergy Operations, Inc., Arkansas Nuclear One, Alert at Arkansas Nuclear One, Unit 2, 10/24/2007
PNO-IV-06-013, A: UPDATE- Termination of Alert at Arkansas Nuclear One, Unit 22006-10-31031 October 2006
PNO-IV-06-013A: UPDATE- Termination of Alert at Arkansas Nuclear One, Unit 2
ML0630305612006-10-30030 October 2006
PNO-IV-06-013 Entergy Operations, Inc., Arkansas Nuclear One, Unit 2, Alert at Arkansas Nuclear One, Unit 2, 10/30/2006
PNO-IV-02-068, Inadvertent Actuation of Emergency Sirens in Vicinity of ANO2002-11-14014 November 2002
PNO-IV-02-068: Inadvertent Actuation of Emergency Sirens in Vicinity of ANO
2013-08-08
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December 9, 2013
PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-13004 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region IV, Arlington, Texas, staff on this date.
Facility Arkansas Nuclear One, Unit 2 Entergy Russellville, Arkansas Dockets: 05000368 License Nos. NPF-6 Licensee Emergency Classification X Notification of Unusual Event Alert Site Area Emergency General Emergency Not Applicable
SUBJECT:
ARKANSAS NUCLEAR ONE, UNIT 2, NOTIFICATION OF UNUSUAL EVENT
DESCRIPTION:
On December 9, 2013, at approximately 7:49 a.m. (CST), Arkansas Nuclear One (ANO), Unit 2 which was operating at 100 percent power, experienced an explosion and fire in the Unit 2 auxiliary transformer resulting in a reactor trip. The auxiliary transformer was supplying power to the safety and non-safety buses from the output of the Unit 2 main generator at the time of the explosion. As a result of the event, normal off-site power to one bus was lost and the emergency diesel generator is providing power to that bus. The licensee is currently performing a plant cooldown to cold shutdown.
At 8:00 a.m. (CST) the licensee declared a Notice of Unusual Event.
Unit 1 is currently operating at 98 percent with electrical buses powered from their normal supplies.
The State of Arkansas was notified.
The NRC resident inspectors responded to ANO, and are monitoring the licensee's actions.
The Region IV office received initial notification of this occurrence by telephone from the Senior Resident Inspector on December 9, at 7:51 a.m. (CST). This information presented herein has been discussed with the licensee and is current as of 1:17 p.m. (CST) on December 9, 2013.
CONTACTS:
Greg Werner, Branch Chief, (817) 320-3984
Brian Tindell, Senior Resident Inspector, ANO
ADAMS ACCESSION NUMBER:
ML13343A245
