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Category:NRC Preliminary Notification of Event/Occurrence
MONTHYEARPNO-II-19-001, Browns Ferry Unplanned Shutdown Greater than 72 Hours Following a Loss of Offsite Power and Subsequent Reactor Scram2019-03-12012 March 2019
PNO-II-19-001 - Browns Ferry Unplanned Shutdown Greater than 72 Hours Following a Loss of Offsite Power and Subsequent Reactor Scram
PNO-II-14-006, A - Shutdown Greater than 72 Hours Due to Increased Primary Coolant Leakage2014-08-0606 August 2014
PNO-II-14-006A - Shutdown Greater than 72 Hours Due to Increased Primary Coolant Leakage
ML14217A3902014-08-0505 August 2014
PNO-II-14-006 - Shutdown Greater than 72 Hours Due to Increased Primary Coolant Leakage
PNO-II-13-004, A - Browns Ferry, Unit 1, Update-Unplanned Shutdown Greater than 72 Hours Due to Reactor Feedwater Heater Level Control Line Leak2013-03-27027 March 2013
PNO-II-13-004A - Browns Ferry, Unit 1, Update-Unplanned Shutdown Greater than 72 Hours Due to Reactor Feedwater Heater Level Control Line Leak
ML13080A2402013-03-21021 March 2013
PNO-II-13-004 - Unplanned Shutdown Greater than 72 Hours Due to Reactor Feedwater Heater Level Control Line Leak
PNO-II-11-003, B, Preliminary Notification of Event or Unusual Occurrence2011-05-0202 May 2011
PNO-II-11-003B, Preliminary Notification of Event or Unusual Occurrence
ML1111900042011-04-28028 April 2011
PNO-II-11-003A - Preliminary Notification of Unusual Event Due to Loss of Offsite Power (Update)
ML1111800052011-04-27027 April 2011
PNO-II-11-003 - Preliminary Notification of Event or Unusual Occurence
ML1019304572010-04-0707 April 2010
Notification of Spill of Water Containing Tritium - EN 45820
PNO-II-07-013, Browns Ferry Refueling Floor Crane Cable Deformation2007-10-24024 October 2007
PNO-II-07-013: Browns Ferry Refueling Floor Crane Cable Deformation
PNO-II-07-011, A - Update, Browns Ferry, Unit 3, Pressure Boundary Leakage Discovered During Drywell Inspection2007-10-0101 October 2007
PNO-II-07-011A - Update, Browns Ferry, Unit 3, Pressure Boundary Leakage Discovered During Drywell Inspection
ML0726705112007-09-24024 September 2007
PNO-II-07-011: Browns Ferry Unit 3, Pressure Boundary Leakage Discovered During Drywell Inspection
2019-03-12
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October 1, 2007 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-II-07-011A 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 Region II staff (Atlanta, Georgia) on this date.
Facility Licensee Emergency Classification Browns Ferry Nuclear Plant Notification of Unusual Event Unit 3 Alert Athens, AL Site Area Emergency Docket/License: 05000296/DPR-68 General Emergency X Not Applicable
Subject:
UPDATE - BROWNS FERRY UNIT 3 PRESSURE BOUNDARY LEAKAGE DISCOVERED DURING DRYWELL INSPECTION Unit 3 was shut down to perform a drywell inspection to determine the size and source of unidentified Reactor Coolant System leakage. The licensee subsequently performed repairs to an identified weld defect in a test line off of the Loop II Residual Heat Removal injection and Unit 3 was restarted on September 27, 2007, at 5:05 a.m. CDT. The unit is currently operating in Mode 1 at 100% reactor power. Current Unit 3 unidentified Reactor Coolant System leakrate is 1.55 gpm of which the principal source is a non-pressure boundary seal ring leak on a reactor water cleanup suction valve.
The State of Alabama has been informed. The information in this preliminary notification has been reviewed with licensee management, and is current as of 2:00 p.m., on Monday, October 1, 2007.
CONTACT: Stephen C. OConnor 404-562-4629
