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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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February 9, 2009 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-09-001 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest
significance. The information is as initially receiv ed without verification or evaluation, and is basically
all that is known by the Region IV, Arlington, Texas, staff on this date.
Facility Entergy Operating, Inc.
Arkansas Nuclear One - Unit 1
Russellville, AR 72802
Docket No. 50-313
License No. DPR-51
Licensee Emergency Classification X Notification of Unusual Event Alert Site Area Emergency General Emergency Not Applicable
SUBJECT:
UNIT 1 TRIP AND FIRE ASSOCIATED WITH MAIN GENERATOR DESCRIPTION:
On February 7, 2009, at 1059 CST, Arkansas Nuclear One Unit 1 declared a Notice of Unusual Event based on a fire onsite. The fire occurred on the 354 foot elevation iso-phase bus deck of the turbine
building. The fire was attributed to a failed bonnet on a manual valve which had unthreaded during
operation releasing hydrogen in the vicinity of the hydrogen add station. The licensee extinguished the fire using water and posted a re-flash watch. There were no reported personnel injuries. Offsite assistance was requested from the London Fire Department which arrived onsite after the fire had been
extinguished.
Operators manually tripped the reactor prior to discovery of the fire, based upon notification of the
hydrogen leak. The plant is currently stable with decay heat removal via the steam dumps to the main
condenser. The licensee informed state/local agencies and the NRC Resident Inspector.
The Unusual Event was terminated at 1338 CST after confirmation that the fire was extinguished and a
review of the exit criteria as defined in plant procedures. The licensee has informed state/local
agencies.
The information presented herein has been discussed with the licensee and is current as of 1000 CST.
No further action by the staff is anticipated.
ADAMS ACCESSION NUMBER:
ML090400579
CONTACTS: Jeffrey Clark, 817-860-8147, jeff.clark@nrc.gov
