As for the Unit 3, the in-core inspections (Phase 3) has been finished today. Hereby, all of the reactor opening and in-core inspections, which started on Aug. 21st, 2007, have been completed. In the inspections, no abnormality such as damage, deformation and dropout which has an impact on the equipments in reactors has been found.* We will verify the soundness of in-core structures on the basis of the inspection /evaluation plans made by each reactor including the results of in-core inspections. * Major nonconformances found in the incore-inspections We will repair the deformations of the legs for temporary storage for positioning the steam separator and the misalignment of the wedge of No.1 jet pump. ○ Schedule and results of reactor opening and in-core inspection The Unit 1 (regular outage) 1) In-core inspection: Performed from Aug. 21st to Dec. 14th (Phase 1: Performed from Aug. 21st to Aug. 23rd) (Phase 2: Performed from Sep. 14th to Oct. 1st) (Phase 3: Performed from Nov. 26th to Dec. 14th) * When the earthquake occurred, the unit 1 was under the regular outage. Its reactor was opened and the removal of fuel assemblies was completed at that time. The Unit 2 (start up for operation) 2) Reactor opening: Performed from Oct. 19th to Oct. 24th In-core inspection: Performed from Oct. 25th to Dec. 25th (Removal of fuel assemblies: Performed from Oct. 26th to Nov. 2nd) (Phase 1&2: Performed from Nov. 3rd to Nov. 19th) (Phase 3: Performed from Dec. 3rd to Dec. 25th) The Unit 3 (operation) 3) Reactor opening: Performed from Dec. 24th to Jan. 8th In-core inspection: Performed from Jan. 9th to Feb. 19th (Removal of fuel assemblies: Performed from Jan. 10th to Jan. 20th) (Phase 1&2: Performed from Jan. 21st to Feb. 5th) (Phase 3: Performed from Feb. 6th to Feb. 19th) * The results of in-core inspections (Phase 3) will be evaluated from Feb. 17th to Feb. 19th. The Unit 4 (operation) 4) Reactor opening: Performed from Dec. 4th to Dec. 10th In-core inspection: Performed from Dec. 11th to Feb. 5th (Removal of fuel assemblies: Performed from Dec. 12th to Dec. 21st) (Phase 1&2: Performed from Dec. 22nd to Jan. 16th) (Phase 3: Performed from Jan. 21st to Feb. 5th) The Unit 5 (regular outage) 5) Reactor opening: Performed from Oct. 20th to Oct. 29th In-core inspection: Performed from Oct. 30th to Dec. 27th (Removal of fuel assemblies: Performed from Nov. 3rd to Nov. 20th) (Phase 1&2: Performed from Nov. 22nd to Dec. 6th) (Phase 3: Performed from Dec. 13th to Dec. 27th) The Unit 6 (regular outage) 6) Reactor opening: Performed from Nov. 5th to Nov. 12th In-core inspection: Performed from Nov. 13th to Jan. 28th (Removal of fuel assemblies: Performed from Nov. 16th to Nov. 26th) (Phase 1&2: Performed from Dec. 4th to Dec. 27th) (Phase 3: Performed from Jan. 10th to Jan. 28th) The Unit 7 (operation) 7) Reactor opening: Performed from Oct. 2nd to Oct. 8th In-core inspection: Performed from Oct. 9th to Dec. 26th (Removal of fuel assemblies: Performed from Oct. 11th to Oct. 23rd) (Phase 1&2: Performed from Nov. 20th to Nov. 30th) (Phase 3: Performed from Dec. 10th to Dec. 26th) 1)-7):Status of the each unit when the earthquake occurred. <Reference> Major nonconformances found in these reactor opening and incore-inspections The Unit 1: deformations of the legs for temporary storage for positioning the steam separator The Unit 5: misalignment of the wedge of No.1 jet pump The Unit 5: misalignment of a fuel assembly and its fuel support The Unit 6: the event that two control rods could not be extracted The Unit 7: the event that one control rod could not be extracted The Unit 7: two minor scratches found at the reactor well |
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