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 April 4th to April 10th, 2008.  
    (Completed on the following date) 

  • Unit No.2 Main generator inspection (withdrawal of rotor): 
      April 9th 
  • Unit No.5 Fuel and control rod inspection (visual inspection of channel box): 
      April 4th 
  • Unit No.5 Fuel and control rod inspection (visual inspection of control rod): 
      April 4th
  • Unit No.6 Fuel and control rod inspection (inspection of spent fuel pool rack etc.):
      April 7th 
  • Unit No.6 Stack inspection (internal inspection): 
      April 7th 
  • Unit No.7 New fuel storage warehouse and new fuels in the warehouse inspection 
    (inspection of new fuels): 
      April 7th 
  • Unit No.7 Main transformer inspection (carrying in): 
      April 9th 
  • High-voltage start-up transformer #3 inspection (internal inspection): 
      April 5th 

 ○  Inspection and restoration to be commenced between April 11th to April 17th, 2008
    (To be commenced on the following date)  

  • Unit No.1 Fuel and control rod inspection (visual inspection of fuel): 
      April 16th 
  • Unit No.3 Inspection of reactor recirculation piping applicable to the 
    Fitness-for-Service rule (cutting out piping): 
      April 15th
  • Unit No.5 Stack inspection (detailed inspection for top of stack):
      April 15th 
  • Unit No.5 Main exhaust duct inspection and restoration (survey prior to 
    restoration work): 
      April 15th
  • Unit No.6 Main transformer inspection (carrying in): 
      April 17th 
  • Unit No.6 House transformer (6A, 6B) inspection (installation work): 
      April 17th 
  • Unit No.7 Fuel and control rod inspection (inspection of spent fuel pool 
    rack etc.): 
      April 15th 
  • Unit No.7 Main transformer inspection (installation work):
      April 10th*
  • Unit No.7 House transformer (7A) inspection (installation work): 
      April 11th 

                                                      * Work schedules added this week

 ○  Work Schedule of Major Inspection/Restoration from April 6th to May 3rd, 2008

  • 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 April 3rd to April 9th, 2008.

○ Incidents Information (relating to the Chuetsu-Oki Earthquake)  
<Reports from Apr. 3 to Apr. 9, 2008>  
 ○  Other Findings 
  • Solid waste storage warehouse: 
    22,391 drums have been confirmed as of March 17th, 2008. (Announced on March 19th, 2008)

  • Information on Nonconformances (those related to: the Chuetsu-Oki Earthquake; 
    Grades As, A, B, C, D; and non-graded)   
  • Unit No.7: 
    Partial breakages were found on forks of 2 rotor blades on the turbine-side of 
    14th-stage of the low-pressure turbine (B) and (C). Investigation of the causes 
    and detailed inspection are going on (announced on March 13th,  March 19th, 
    March 27th, and April 3rd, 2008).
    Visual inspection conducted for forks of rotor blades on the generator-side of 
    14th-stage of the low-pressure turbine (B) revealed no additional damage. 
    Non-destructive inspection conducted for forks of rotor blades on the 
    generator-side and turbine-side of 14th-stage of the low-pressure turbine 
    (B) resulted in indications on the fork of 22 rotor blades on the generator-side 
    and 50 rotor blades on the turbine-side.
    Investigation on the cause of the damages and the indication will be continued 
    as well as non-destructive inspections for fixtures of rotor fork of the 14th-stage 
    of the low-pressure turbine (A), (B) and (C).

  • Unit No.5:
    The fuel assembly that had been found dislocated from the fuel support was returned 
    to its original location after having been confirmed there was no large deformation. 
    It was then transported to the spent fuel pool (announced on November 12th, November 
    14th, and November 20th, 2007.) 
    According to the investigation, the cause for the dislocation was assumed to be as 
    follows:
    - Due to misalignment of the location setting of the fuel handling machine, the channel 
      fastener of the fuel assembly touched the core support plate and swung;
    - The bottom head of the fuel assembly swung over the fuel support;
    - The Niigata-Chuetsu-Oki Earthquake aggravated the situation and led to dislocation of 
       the fuel assembly.
    As corrective actions, we will review the alignment of the fuel handling machine as well 
    as monitor the load on the fuel handling machine at the time of fuel loading and whenever 
    an anomaly is found, we will retry the loading procedure.  

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 190KB)