ENS 46637
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ENS Event | |
|---|---|
19:25 Feb 22, 2011 | |
| Title | Technical Specification Required Shutdown Due to Service Water Piping Leak |
| Event Description | At approximately 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br />, the Control Room received notification of a leak in the Unit 3 West Service Water (SW) valve pit of approximately 150 gpm on the SW piping downstream of SW valves SWN-6 and SWN-7. The piping supplies conventional essential SW loads. Abnormal operating procedure 3-AOP-SW-1 (SW Malfunction) was entered due to a report of approximately 3 feet of water in the West valve pit in the area of SW valves SWN-6/SWN-7 and SWN-1111/SWN-1112. Adjustments were made to equipment to reduce the leak and pumps placed in the pit to reduce the pit water level. At 1203 hours0.0139 days <br />0.334 hours <br />0.00199 weeks <br />4.577415e-4 months <br />, Technical Specification 3.7.9, 'Service Water System' (SWS), Condition E, 'SWS piping and valves inoperable for reasons other than Condition A, B, C or D with no loss of safety function' was entered.
After further assessment of the condition, it was determined at 1425 hours0.0165 days <br />0.396 hours <br />0.00236 weeks <br />5.422125e-4 months <br />, that the condition would prevent the credited method of isolating the SW loads in the event of cold leg recirculation during a DBA due to inaccessibility to the valve pit for valve operation. This condition constituted a loss of safety function, and the plant entered TS 3.0.3. In accordance with TS 3.0.3, the unit initiated actions to shut down the plant at 1524 hours0.0176 days <br />0.423 hours <br />0.00252 weeks <br />5.79882e-4 months <br />. This condition meets the reporting criteria of 10 CFR 50.72(b)(2)(i), 'The initiation of any plant shutdown required by the plants TS,' and an event or condition that could have prevented fulfillment of the safety function of structures, or systems that are needed to (D) mitigate the consequences of an accident which is reportable under 10 CFR 50.72(b)(3)(v). Investigations of the condition are in progress. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Indian Point  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-2.25 h-0.0938 days <br />-0.0134 weeks <br />-0.00308 months <br />) | |
| Opened: | Mike Mccarthy 17:10 Feb 22, 2011 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Feb 22, 2011 |
| 46637 - NRC Website
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Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (57 %) |
WEEKMONTHYEARENS 535892018-09-07T04:00:0007 September 2018 04:00:00
[Table view]10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Technical Specification Required Shutdown ENS 520392016-06-24T08:00:00024 June 2016 08:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Ts Required Shutdown Due to Leaking Service Water Weld on Ccw Hx ENS 507222015-01-08T12:00:0008 January 2015 12:00:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Loss of Both Channels of Refueling Water Storage Tank Instrumentation ENS 504672014-09-18T15:50:00018 September 2014 15:50:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Misaligned Control Rod ENS 478032012-04-04T09:00:0004 April 2012 09:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Inoperable Static Inverter ENS 473142011-10-03T07:45:0003 October 2011 07:45:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unit 2 Entered Tech Spec 3.0.3 After Declaring All Three Containment Recirc Fan Coolers Inoperable ENS 466372011-02-22T19:25:00022 February 2011 19:25:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Service Water Piping Leak ENS 400692003-08-14T20:23:00014 August 2003 20:23:00 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, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unusual Event Declared Due to Loss of Offsite Power Greater than 15 Minutes. 2018-09-07T04:00:00 | |
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