ENS 42954
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ENS Event | |
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23:05 Nov 1, 2006 | |
Title | Unit Shutdown Required Due to Service Water Leak Involving a Containment Air Cooler |
Event Description | On November 1, 2006, at 1530 hours0.0177 days <br />0.425 hours <br />0.00253 weeks <br />5.82165e-4 months <br /> EST, a service water leak was identified in the cooling coil of Containment Air Cooler VHX-4. While this containment air cooler has no safety function for containment cooling, the breached cooling coil represents an inoperable containment boundary.
In accordance with Technical Specification (T.S.) 3.6.1.B1&2, a shutdown was initiated at 1805 hours0.0209 days <br />0.501 hours <br />0.00298 weeks <br />6.868025e-4 months <br /> EST, following expiration of the completion time of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> for restoring containment to operable per T.S. 3.6.1.A.1. The licensee anticipates having the unit in mode 3 Hot Standby by 2205 hours0.0255 days <br />0.613 hours <br />0.00365 weeks <br />8.390025e-4 months <br /> EST, at which time an evaluation involving extent of condition for the required repairs will be performed. The leak is characterized at this time as 300 ml/minute. The licensee informed 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:+-4.42 h-0.184 days <br />-0.0263 weeks <br />-0.00605 months <br />) | |
Opened: | Dan Malone 18:40 Nov 1, 2006 |
NRC Officer: | Steve Sandin |
Last Updated: | Nov 1, 2006 |
42954 - NRC Website
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Unit 1 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (80 %) |
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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