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At approximately 1030 hours, the Control R … At approximately 1030 hours, 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 hours, 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. </br>After further assessment of the condition, it was determined at 1425 hours, 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 hours. 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.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
19:25:00, 22 February 2011 +
46,637 +
17:10:00, 22 February 2011 +
19:25:00, 22 February 2011 +
At approximately 1030 hours, the Control R … At approximately 1030 hours, 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 hours, 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. </br>After further assessment of the condition, it was determined at 1425 hours, 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 hours. 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.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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