ENS 48478
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ENS Event | |
---|---|
16:30 Nov 4, 2012 | |
Title | Technical Specification Required Shutdown Due to Secondary Side Steam Leak |
Event Description | At 1115 EST on November 4, 2012, primary coolant loop #2 was declared inoperable due to a small un-isolable steam leak on a drain valve of an atmospheric steam dump valve on the secondary side of the 'B' Steam Generator. The valve is ASME Class II high energy piping and the non-conforming condition could not be evaluated with the steam generator pressurized. Based on the condition of the valve and the inability to evaluate, Technical Specification 3.4.4, PCS loops - Modes 1 and 2, Required Action A.1 was entered which requires the plant to be placed in Mode 3 in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Repair of the valve may require cooldown to Mode 5.
At 1230 EST on November, 2012, Palisades initiated a shutdown in accordance with Technical Specification 3.4.4. The licensee has notified the NRC Resident Inspector. |
Where | |
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Palisades ![]() Michigan (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
Time - Person (Reporting Time:+-1.63 h-0.0679 days <br />-0.0097 weeks <br />-0.00223 months <br />) | |
Opened: | Todd Mulford 14:52 Nov 4, 2012 |
NRC Officer: | John Knoke |
Last Updated: | Nov 4, 2012 |
48478 - NRC Website
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Unit 1 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (47 %) |
WEEKMONTHYEARENS 490022013-05-05T05:12:0005 May 2013 05:12:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown - Safety Injection Refueling Water Tank Declared Inoperable Due to Leak ENS 487582013-02-15T18:00:00015 February 2013 18:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Component Cooling Water Train Out of Service ENS 484782012-11-04T16:30:0004 November 2012 16:30:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Secondary Side Steam Leak ENS 480182012-06-12T18:56:00012 June 2012 18:56:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 443852008-08-06T00:29:0006 August 2008 00:29:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Tech Spec Required Shutdown Due to Excessive Unidentified Leakage ENS 429542006-11-01T23:05:0001 November 2006 23:05:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unit Shutdown Required Due to Service Water Leak Involving a Containment Air Cooler ENS 424622006-03-29T17:15:00029 March 2006 17:15:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Hpsi Inoperability 2013-05-05T05:12:00 | |
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