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On Friday August 12, 2011 at 1429 CDT, a t … On Friday August 12, 2011 at 1429 CDT, a through-wall leak was discovered on the body of the High Pressure Coolant Injection (HPCI) Inlet Drain Pot Inboard Drain valve to the Main Condenser, AOV 2-2301-29. This is a safety-related, ASME Code Class 2 valve. Dresden Technical Requirements Manual 3.4.a, Condition B requires the leak to be isolated which renders the HPCI System Inoperable. The Unit 2 HPCI system was isolated and declared inoperable at 1646 CDT, and Technical Specification 3.5.1 Condition G has been entered. The HPCI system is a single train system.</br>The event is being reported pursuant to 10 CFR 50.72(b)(3)(v)(D), 'any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.'</br>T.S. 3.5.1 condition G is a 14 day LCO and the utility can make the repair at power. The unit is in a normal electrical lineup with offsite power available and all EDG's are operable. There was a slight increase in plant risk to "yellow" as a result of this issue. </br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified. +
19:29:00, 12 August 2011 +
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19:29:00, 12 August 2011 +
On Friday August 12, 2011 at 1429 CDT, a t … On Friday August 12, 2011 at 1429 CDT, a through-wall leak was discovered on the body of the High Pressure Coolant Injection (HPCI) Inlet Drain Pot Inboard Drain valve to the Main Condenser, AOV 2-2301-29. This is a safety-related, ASME Code Class 2 valve. Dresden Technical Requirements Manual 3.4.a, Condition B requires the leak to be isolated which renders the HPCI System Inoperable. The Unit 2 HPCI system was isolated and declared inoperable at 1646 CDT, and Technical Specification 3.5.1 Condition G has been entered. The HPCI system is a single train system.</br>The event is being reported pursuant to 10 CFR 50.72(b)(3)(v)(D), 'any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.'</br>T.S. 3.5.1 condition G is a 14 day LCO and the utility can make the repair at power. The unit is in a normal electrical lineup with offsite power available and all EDG's are operable. There was a slight increase in plant risk to "yellow" as a result of this issue. </br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified. +
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