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The past operability of the 2A train of Au … The past operability of the 2A train of Auxiliary Feedwater has been called into question based on finding clam shells in the safety related water source piping. During performance of valve strokes on 5/9/2011 per an Operations Department surveillance, clam shells were found while draining a section of the safety related water source piping. System Engineering collected the shells as part of troubleshooting. Based on analysis performed by System Engineering, the 2A Train of Auxiliary Feedwater was not operable with clam shells in the pipe. The amount of shells present would have caused an unacceptable differential pressure across the 2A train Auxiliary Feedwater System flow control valves. The extent of condition has been evaluated for the other Auxiliary Feedwater trains for both units and it has been determined that the only affected train is 2A. The 2B Auxiliary Feedwater train has also been inoperable at various times over the past 3 years for maintenance. </br>The clams were flushed out of the 2A Train Auxiliary Feedwater suction piping during a recent refueling outage and both trains of Auxiliary Feedwater on Unit 2 are operable. </br>The licensee has not implemented any compensatory measures nor are they in any LCO's as a result this event.</br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified. +
23:00:00, 20 May 2011 +
46,868 +
22:57:00, 20 May 2011 +
23:00:00, 20 May 2011 +
The past operability of the 2A train of Au … The past operability of the 2A train of Auxiliary Feedwater has been called into question based on finding clam shells in the safety related water source piping. During performance of valve strokes on 5/9/2011 per an Operations Department surveillance, clam shells were found while draining a section of the safety related water source piping. System Engineering collected the shells as part of troubleshooting. Based on analysis performed by System Engineering, the 2A Train of Auxiliary Feedwater was not operable with clam shells in the pipe. The amount of shells present would have caused an unacceptable differential pressure across the 2A train Auxiliary Feedwater System flow control valves. The extent of condition has been evaluated for the other Auxiliary Feedwater trains for both units and it has been determined that the only affected train is 2A. The 2B Auxiliary Feedwater train has also been inoperable at various times over the past 3 years for maintenance. </br>The clams were flushed out of the 2A Train Auxiliary Feedwater suction piping during a recent refueling outage and both trains of Auxiliary Feedwater on Unit 2 are operable. </br>The licensee has not implemented any compensatory measures nor are they in any LCO's as a result this event.</br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified. +
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100 +
00:00:00, 20 May 2011 +
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22:57:00, 20 May 2011 +
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23:00:00, 20 May 2011 +
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