We are announcing the status of major inspections and restoration works and 
nonconformances at TEPCO's Kashiwazaki-Kariwa Nuclear Power Station after 
the Niigata-Chuetsu-Oki Earthquake.

1. Inspection/Restoration Status

 ○ Inspection and restoration completed between November 30th to December 6th, 2007
    (Completed on the following date) 
  • Unit No.1 Turbine inspection (internal inspection):
      November 30th 
  • Unit No.2 Excitation transformers oil extraction and internal inspection:
      December 3rd 
  • Unit No.3 Removal of spent fuel pool underwater work platform:
      December 4th 
  • Unit No.4 Refueling floor service tools inspection (stud tensioners, etc.)
      December 3rd 
  • Unit No.4 Removal of spent fuel pool underwater work platform:
      December 5th 
  • Unit No.5 In-core inspection (Phase1 and Phase2):
      December 6th 
  • Unit No.6 Reactor internal pump input transformer transportation into the factory:
      December 3rd 
  • Unit No.7 In-core inspection (Phase1 and Phase2):
      November 30th 
  • Unit No.7 Turbine inspection (internal inspection):
      November 30th 
  • Inspections of house boilers (Arahama-side)
      November 30th 

 ○ Inspection and restoration to be commenced between December 7th to December 13h, 2007
    (To be commenced on the following date)  
  • Unit No.2 In-core inspection (spent fuel pool rack hangers):
      December 7th 
  • Unit No.4 In-core inspection:
      December 11th 
  • Unit No.4 Reactor pressure vessel inspection (nozzle parts etc.):
      December 8th 
  • Unit No.4 Main transformer oil extraction and internal inspection:
      December 11th 
  • Unit No.5 In-core inspection (Phase3):
      December 13th 
  • Unit No.7 In-core inspection (Phase3):
      December 10th 
  • Replacement of seismic data recorders (Unit No.1, 5 and 6):
      December 10th 

 ○ Work Schedule for Major Inspection/Restoration from December 2nd to December 29th, 2007
  • Work Schedule of the Main Inspection/Restoration of the Kashiwazaki-Kariwa Nuclear Power 
    Station in Response to the Niigata-Chuetsu-Oki Earthquake (during 4 Weeks)....Appendix

2. Nonconformances Found in the Inspection and Restoration Works Performed after 
   the Niigata-Chuetsu-Oki Earthquake

   Based on the "Public Announcement Regarding Nonconformance Found in the Inspection 
   and Restoration Works Performed after the Niigata-Chuetsu-Oki Earthquake", 
   the Tokyo Electric Power Company, Incorporated (TEPCO) provides this announcement 
   containing incidents information reported from November 30th to December 5th, 2007.

 ○ Incidents Information (relating to the Chuetsu-Oki Earthquake)


 <Reports from Nov. 30 to Dec. 5, 2007>


 ○ Other Findings
  • Unit No.3: 
    As a result of visual inspections of the spent fuel pool conducted subsequent to 
    the removal of underwater work platform in the pool (completed on December 3rd), 
    two minor scratches were found on the spent fuel pool wall (completed on December 4th).

  • Unit No.4: 
    As a result of visual inspections of the spent fuel pool conducted subsequent to 
    the removal of underwater work platform in the pool (completed on November 30th), 
    four minor scratches on the spent fuel pool wall and a minor scratch on the handle 
    of the fuel assembly were found (completed on December 5th).  

  • Unit No.6:  
    The two control rods that could not be pulled out initially were disassembled and 
    inspected to measure the labyrinth seal and the ratch mechanism. However, no 
    abnormality (such as foreign material or a large damage) was found. No abnormality 
    (such as scratch, deformation, etc.) was found for equipment on the reactor-side 
    (control rod, fuel support, fuel guide) as well. We will continue to investigate 
    the cause. 

  • Unit No.7:
    As a result of the detailed inspection of the low-pressure turbine (B), wears 
    (maximum about 2mm) were found at the edges of the rotor blades (shrouds of the 10th 
    to 12th stage). These wears are presumed to have happened due to contact of the rotor 
    blades and the stator blades. A wear (maximum about 1mm) was also found at the stator 
    blade. Repair works will be considered. 

Appendix: Work Schedule of the Main Inspection/Restoration of the Kashiwazaki-Kariwa Nuclear 
          Power Station in Response to the Niigata-Chuetsu-Oki Earthquake
          (during 4 Weeks)(PDF 207KB)