ENS 49002
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ENS Event | |
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05:12 May 5, 2013 | |
Title | Technical Specification Shutdown - Safety Injection Refueling Water Tank Declared Inoperable Due to Leak |
Event Description | At 0112 EDT on May 5, 2013, the plant commenced a shutdown due to water leakage from the SIRW (Safety Injection Refueling Water) Tank exceeding the operational decision-making issue process trigger point of 34 gallons per day, causing it [the SIRW] to be declared inoperable and requiring entry into Technical Specification LCO 3.5.4 Condition B. LCO 3.5.4 Condition B requires the SIRW Tank to be returned to Operable status within one hour or entry into Condition C which requires the plant to be in Mode 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and Mode 5 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.
This event had no impact on the health and / or safety of the public. The NRC Resident has been notified. The exact location of the leakage has not been determined at this time. The Plant will be taken to Mode 5. The licensee has been operating with SIRW leakage at a rate of less than 34 gallons per day. The leakage has increased for unknown reasons to a calculated value of approximately 90 gallons per day. See EN #48018 dated 06/12/12 for similar report on a technical specification shutdown for the SIRW tank leakage. |
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:+-3.45 h-0.144 days <br />-0.0205 weeks <br />-0.00473 months <br />) | |
Opened: | Todd Mulford 01:45 May 5, 2013 |
NRC Officer: | Bill Huffman |
Last Updated: | May 5, 2013 |
49002 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (88 %) |
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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