Monday, April 27, 2009

NRC report on Beaver Valley

NDT REVEALS CIRCUMFERENTIAL INDICATIONS ON RCS HOT LEG DRAIN PIPING "On April 26, 2009 at approximately 1000 hours during the Beaver Valley Power Station Unit No. 1 (BVPS-1) refueling outage, ultrasonic (UT) examinations were performed on pipe base material per the Materials Reliability Project (MRP) MRP-146 recommendations. The MRP recommendations were to address industry operating experience for similar indications identified by other utilities. Two circumferential UT indications approximately 3/8 inches in length were recorded in the base material adjacent to a socket weld on the horizontal portion of line BV-1 RC-41 which is a two (2) inch drain line that connects to the 'A' Reactor Coolant System (RCS) Hot Leg. The function of this piping is to drain the applicable loop during maintenance periods. The indications are not through wall and there was no evidence of leakage. Similar 2 inch drain lines on the other loops have been inspected satisfactorily. "The plant is currently shutdown and in Mode 6. The affected RCS loop is not required to be Operable and is currently isolated and drained. Repairs are currently being planned and will be completed prior to startup. "This is reportable pursuant to 10 CFR 50.72(b)(3)(ii)(A). "The NRC Resident Inspector has been notified

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