|
|---|
Category:NRC Preliminary Notification of Event/Occurrence
MONTHYEARPNO-III-24-001, Braidwood, Braidwood Nuclear Generating Plant Expiration of Security Officer Union Contract2024-04-0101 April 2024
PNO-III-24-001: Braidwood, Braidwood Nuclear Generating Plant Expiration of Security Officer Union Contract
ML17165A4592017-06-14014 June 2017
PNO-III-2017-001: Braidwood Station, Units 1 and 2; Release of Circulating Water Containing Tritium Using an Unauthorized Release Path
PNO-III-11-005, Braidwood Unit 2 Unusual Event Due to Loss of All Control Room Annunciators2011-03-24024 March 2011
PNO-III-11-005, Braidwood Unit 2 Unusual Event Due to Loss of All Control Room Annunciators
PNO-III-10-014, A; Update - Shutdown of Braidwood Reactors Unit 1 & 22010-08-23023 August 2010
PNO-III-10-014A; Update - Shutdown of Braidwood Reactors Unit 1 & 2
ML1022902932010-08-17017 August 2010
PNO-III-10-014 - Shutdown of Braidwood Reactors Unit 1 & 2
PNO-III-10-001, Braidwood Station Declaration of Unusual Event Due to Fire within the Protected Area2010-01-11011 January 2010
PNO-III-10-001: Braidwood Station Declaration of Unusual Event Due to Fire within the Protected Area
PNO-III-09-007, A: Unusual Event at Braidwood Unit 2 Due to Loss of Offsite Power Unit Will Remain Shut Down for More than 72 Hours (Update)2009-08-0505 August 2009
PNO-III-09-007A: Unusual Event at Braidwood Unit 2 Due to Loss of Offsite Power Unit Will Remain Shut Down for More than 72 Hours (Update)
PNO-III-06-020, Braidwood, Nrc'S Review of Exelon'S Plans for Resuming Radioactive Discharges Through the Braidwood Blowdown Line2006-09-0808 September 2006
PNO-III-06-020: Braidwood, Nrc'S Review of Exelon'S Plans for Resuming Radioactive Discharges Through the Braidwood Blowdown Line
PNO-III-06-015, Braidwood Tritium Contamination Issues (Update)2006-06-13013 June 2006
PNO-III-06-015: Braidwood Tritium Contamination Issues (Update)
PNO-III-06-011, Braidwood: Tritiated Steam Released to the Environment2006-04-0707 April 2006
PNO-III-06-011, Braidwood: Tritiated Steam Released to the Environment
PNO-III-06-007, Braidwood 1 and 2 - Tritium Contamination Issues2006-03-30030 March 2006
PNO-III-06-007: Braidwood 1 and 2 - Tritium Contamination Issues
PNO-III-05-016, D Braidwood Tritium Contamination Issues (4th Upgrade)2006-03-15015 March 2006
PNO-III-05-016D Braidwood Tritium Contamination Issues (4th Upgrade)
ML0603405832006-02-0303 February 2006
PNO-III-05-016C Potential Off-Site Migration of Tritium Contamination (3rd Update)
ML0601806232006-01-18018 January 2006
PNO-III-05-016B: Braidwood Potential Off-Site Migration of Tritium Contamination (2nd Update)
ML0618400692005-12-0909 December 2005
E-mail from Habighorst to Lynch, Braidwood Tritium - Recent Contamination Contours, Etc
ML0609706112005-12-0707 December 2005
NRC Email from Justine Burza to Pn Recipients PNO-III-05-016A
ML1020302372005-12-0707 December 2005
Preliminary Notification of Event or Unusual Occurrence
ML0609700692005-12-0101 December 2005
NRC Email W/Att, from Jan Strasma to Richard Skokowski Et Al Draft Pn on Braidwood
ML0533505122005-12-0101 December 2005
PNO-RIII-05-016 Braidwood Potential Off-site Migration of Tritium Contamination
ML0609700572005-12-0101 December 2005
Email for Dale Ambler to Steven Orth Attendees at Pn Debrief
ML0609700592005-12-0101 December 2005
NRC Email from Anne Boland to Geoffrey Grant and James Caldwell PNO-RII-05-016
ML0618401842005-12-0101 December 2005
E-mail from Boland to Shane, NRC Notification Braidwood
PNO-III-05-013, ; Braidwood Forced Outage Due to Reactor Coolant Pump Leak-Off in Excess of Vendor Recommendations2005-09-13013 September 2005
PNO-III-05-013; Braidwood Forced Outage Due to Reactor Coolant Pump Leak-Off in Excess of Vendor Recommendations
2024-04-01
[Table view] |
September 13, 2005 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-III-05-013 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 III staff on this date.
Facility Licensee Emergency Classification Braidwood Station ___Notification of Unusual Event Exelon Nuclear Alert Exelon Generation Company, LLC Site Area Emergency Braceville, IL General Emergency Docket: 50-456 X Not Applicable License: NPF-72
SUBJECT:
FORCED OUTAGE DUE TO REACTOR COOLANT PUMP LEAK-OFF IN EXCESS OF VENDOR RECOMMENDATIONS.
DESCRIPTION:
On Saturday, September 10, 2005, the Braidwood operators were monitoring an ongoing higher than normal leak-off flow from the 1A reactor coolant pump (RCP) seal when the flow rate exceeded the vendors recommended limit of 6.0 gallons per minute (g.p.m.). The licensee initiated a shutdown of the unit and the operators began ramping the unit down at 6:08 p.m.
EDT on Saturday. The ramp down was suspended at 82% power and again at 68% power because the leak-off flow rate returned to an acceptable value. However, the reduced seal leak-off rate could not be maintained. Therefore, the unit was taken off-line at 10:42 p.m. EDT on Sunday, September 11, 2005. The affected RCP was secured at 11:33 p.m. EDT. The maximum seal leak-off flow experienced was 6.25 g.p.m. The unit is expected to be off-line for approximately five days. Major work will be the 1A RCP seal package replacement.
This preliminary notification is issued for information only and no further action by the staff is anticipated.
Region III received initial notification of this occurrence by phone from on shift management at 5:08 p.m. on Saturday, September 10. The information presented herein has been discussed with the licensee, and is current as of 4:00 p.m. EDT, September 12.
CONTACTS: Nick Shah Richard Skokowski (815) 458-2852 (630) 829-9620
