As for the Unit 5, the in-core inspections (Phase 1 & 2) which started on Nov. 22nd, finished today. The results are as follows: ○ Period Nov. 22nd, 2007 - Dec. 6th, 2007 ○ Area • Upper Reactor guide rod, feedwater sparger, core spray pipe, core spray sparger, upper grid plate. • Mid Reactor core support plate, fuel support, jet pump, low pressure core injection system inlet pipe, local power range monitor, core shroud. • Equipment in the temporary storage pool steam dryer, steam separator. ○ Result • As for the No.1 jet pump, on Nov.29th we found that the wedge which was fitted in from the above, in order to prevent vibration of an inlet mixer during reactor operation, was moved from the right position. We will investigate the cause of this misalignment (announced on Nov. 29th and Dec. 3rd). • As for the reactor structures except the No.1 jet pump, no abnormality such as damage, deformation and dropout has been found. |
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