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2000
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Morning Report for April 11, 2000
Headquarters Daily Report APRIL 11, 2000 *************************************************************************** REPORT NEGATIVE NO INPUT ATTACHED INPUT RECEIVED RECEIVED HEADQUARTERS X REGION I X REGION II X REGION III X REGION IV X PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION I APRIL 11, 2000 Licensee/Facility: Notification: Maine Yankee Atomic Power Co. MR Number: 1-00-0006 Maine Yankee 1 Date: 04/11/00 Wiscasset,Maine Dockets: 50-309 PWR/CE Subject: STEEL BEAM KNOCKED OFF GANTRY CRANE DURING STEAM GENERATOR MOVE AT MAINE YANKEE Discussion: On April 7, 2000, at approximately 6:30 p.m., a top beam on a gantry crane was knocked off during the movement of one of the steam generators that was being removed from the Maine Yankee containment building. The steam generator had been successfully lifted with the polar crane and lowered to a horizontal position through the equipment hatch opening. Once horizontal, a gantry crane outside containment was connected to the lower end of the steam generator and raised to allow a special multi-wheel transporter to be positioned under the steam generator. The steel top beam of the gantry crane is supported by two hydraulic gantry towers on either side of the transporter. As the transporter was pulling the steam generator out through the equipment hatch and proceeding under the gantry crane, the transition region of the steam generator (the larger diameter, upper portion) struck the connecting element on the underside of the steel beam of the gantry crane. The large beam was knocked off the towers with one end landing on the ground and the other end landing on the steam generator. No personnel were injured. The contamination-control coating placed on the exterior surface of the steam generator was abraded in several areas, but health physics personnel confirmed no radiological contamination was released and the abraded areas were re-coated. The steam generator was moved to its temporary storage area. Maine Yankee suspended further lifting activities until a root cause evaluation was completed and corrective actions were developed. Regional Action: NRC staff will review licensee corrective actions before the remaining two steam generators are moved. Contact: Mark Roberts (610)337-5094 Ronald R. Bellamy (610)337-5200 _
Page Last Reviewed/Updated Thursday, March 29, 2012
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