ENS 51253
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ENS Event | |
|---|---|
06:15 Jul 23, 2015 | |
| Title | Initiation of Plant Shutdown Due to Rcs Leakage |
| Event Description | On July 23, 2015 at 0115 [CDT], Callaway Plant initiated a shutdown required by Technical Specifications (TS). At 2139 [CDT] on July 22, 2015, TS 3.4.13 Condition A was entered due to unidentified RCS leakage being in excess of the 1 gpm TS limit. The leak was indicated by an increase in containment radiation readings, increasing sump levels, and decreasing levels in the Volume Control tank (VCT).
A containment entry identified a steam plume; due to personnel safety the exact location of the leak inside the containment building could not be determined. At this time radiation levels inside [the] containment are stable and slightly above normal. There have been no releases from the plant above normal levels. The [NRC] Senior Resident Inspector was notified.
Callaway entered TS 3.4.13 Condition B at 0053 [CDT on July 23, 2015] for the subject leakage since reactor coolant pressure boundary leakage could not be ruled out by visual inspection. The estimated leak rate when the decision was made to shut down the plant was approximately 1.8 gpm. The plant entered Mode 3 at 0600 CDT. Additionally, at approximately 1315, it was determined that the duration of the required outage would be greater than three days, thus requiring notification to the Missouri Public Service Commission. This offsite notification is reportable to the NRC [per 10CFR50.72(b)(2)(xi)], and the above table has been updated to reflect this reporting requirement. The licensee notified the NRC Resident Inspector. Notified R4DO (Gepford).
Clarification to the initial event notification: the term 'RCS' used above means 'Reactor Coolant System.' Therefore the second sentence from the initial notification is clarified to read, 'At 2139 [CDT] on July 22, 2015, TS 3.4.13 Condition A was entered due to unidentified Reactor Coolant System (RCS) leakage being in excess of the 1 gallon per minute (gpm) TS limit.' The licensee notified the NRC Resident Inspector. Notified the R4DO (Gepford). |
| Where | |
|---|---|
Callaway  Missouri (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| LER: | 05000483/LER-2015-001 Completion of a Shutdown Required by the Technical Specifications - TS 3.4.13 05000483/LER-2015-001 Regarding Completion of a Shutdown Required by the Technical Specifications - TS 3.4.13 05000483/LER-2015-002 Manual Auxiliary Feedwater System Actuation 05000483/LER-2015-004 Auxiliary Feedwater Control Valve Inoperable Due To Faulty Electronic Positioner Card 05000483/LER-2015-004 Regarding Auxiliary Feedwater Control Valve Inoperable Due to Faulty Electronic Positioner Card |
| Time - Person (Reporting Time:+-1.9 h-0.0792 days <br />-0.0113 weeks <br />-0.0026 months <br />) | |
| Opened: | Walter Gruer 04:21 Jul 23, 2015 |
| NRC Officer: | Jeff Herrera |
| Last Updated: | Jul 26, 2015 |
| 51253 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Cold Shutdown (0 %) |
Callaway with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
WEEKMONTHYEARENS 564012023-03-09T17:53:0009 March 2023 17:53:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Injured Worker ENS 552592021-05-14T18:00:00014 May 2021 18:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Individual Fall from Scaffold Ladder - Other Government Agency Notification ENS 537172018-11-05T05:00:0005 November 2018 05:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Chemical Spill Offsite ENS 512532015-07-23T06:15:00023 July 2015 06:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Initiation of Plant Shutdown Due to Rcs Leakage ENS 504652014-09-17T14:13:00017 September 2014 14:13:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Oil Tanker Truck Spill ENS 503332014-07-31T19:30:00031 July 2014 19:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Tritium and Cobalt Detected in Ground Water Monitoring Well ENS 492192013-07-27T04:49:00027 July 2013 04:49:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event Declared Due to a Fire in the Turbine Building Lasting Greater than 15 Minutes ENS 488792013-04-02T22:07:0002 April 2013 22:07:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Electrical Fault in Switchyard Resulting in Personnel Injuries ENS 482682012-09-02T15:31:0002 September 2012 15:31:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Non-Radiological Leakage from the Neutralization Tank ENS 482362012-08-27T20:26:00027 August 2012 20:26:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Hazardous Material Spill ENS 468142011-05-03T15:36:0003 May 2011 15:36:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Notification to Offsite Agency Regarding Potable Water Residual Chlorine Level ENS 459892010-06-08T09:30:0008 June 2010 09:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of Minor Hydazine Spill ENS 458372010-04-13T17:00:00013 April 2010 17:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to an Identified Leakage Exceeding 25 Gallons Per Minute ENS 448632009-02-19T11:30:00019 February 2009 11:30:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Power Supply Failure Resulting in a Tech Spec Required Shutdown ENS 432812007-04-05T15:23:0005 April 2007 15:23:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Alert Declared Due to Report of a Fire in the Control Building ENS 432272007-03-09T16:43:0009 March 2007 16:43:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip at Reduced Power Due to Inadequate Feedwater Control ENS 429522006-10-31T06:00:00031 October 2006 06:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Contractor Employee Fatality ENS 426762006-06-30T18:00:00030 June 2006 18:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Low Levels of Tritium Found Along Plant Discharge Line ENS 425822006-05-17T20:03:00017 May 2006 20:03:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release News Release and Notification to Other Government Agencies - Planned Plant Shutdown ENS 425772006-05-16T11:30:00016 May 2006 11:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Employee Death ENS 417812005-06-17T00:02:00017 June 2005 00:02:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unit Commenced a Tech Spec Required Shutdown Due to an Electrical Problem Affecting a Safety Related Battery ENS 415372005-03-28T18:48:00028 March 2005 18:48:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Notification of a Forced Outage Expected to Last Longer than Three Days. ENS 415272005-03-26T09:00:00026 March 2005 09:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Inoperable Esw Train. ENS 413472005-01-19T18:51:00019 January 2005 18:51:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Callaway Automatic Reactor Trip on Low Steam Generator Level ENS 405072004-02-05T23:01:0005 February 2004 23:01:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to the Missouri Public Service Commission ENS 402632003-10-21T06:00:00021 October 2003 06:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Plant Shutdown Required by Technical Specifications 2023-03-09T17:53:00 | |
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