ENS 41781
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ENS Event | |
---|---|
00:02 Jun 17, 2005 | |
Title | Unit Commenced a Tech Spec Required Shutdown Due to an Electrical Problem Affecting a Safety Related Battery |
Event Description | At 1302 [CDT], 6/16/05, during investigation of an electrical ground affecting safety related battery NK04, a channel failure alarm actuated for SA075B, Main Steam and Feedwater Isolation Actuation control panel. Work at KJ122, 'B' Emergency Diesel Generator [EDG] local control panel, was suspended and troubleshooting efforts commenced to determine the cause of the SA075B alarm. Concurrently, SA075B was declared Inoperable at 1302 [CDT] and Engineered Safety Feature Actuation System Technical Specification Action statement 3.3.2.S was entered which allowed 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> to restore the train to Operable status, or be in Mode 3 within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. As of 1902 [CDT], all repairs and retests had not been completed. A reactor shutdown was commenced at 1902 [CDT] in accordance with Technical Specification 3.3.2.S, which is reportable per 10CFR50.72(b)(2)(i).
The licensee is continuing their investigation to identify cause of the electrical ground but does not anticipate exiting the LCO Action Statement before completing the Unit shutdown. Safety related battery NK04 is currently operable with the faulted loads isolated. The "B" EDG remains Inoperable at this time for troubleshooting. The licensee informed the NRC Resident Inspector. |
Where | |
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Callaway ![]() Missouri (NRC Region 4) | |
Reporting | |
10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
Time - Person (Reporting Time:+-1.77 h-0.0738 days <br />-0.0105 weeks <br />-0.00242 months <br />) | |
Opened: | Gary Olmstead 22:16 Jun 16, 2005 |
NRC Officer: | Steve Sandin |
Last Updated: | Jun 16, 2005 |
41781 - NRC Website
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Unit 1 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (67 %) |
WEEKMONTHYEARENS 512532015-07-23T06:15:00023 July 2015 06:15:00
[Table view]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 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 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 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 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 2015-07-23T06:15:00 | |
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