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 25th to May 8th, 2008
    (Completed on the following date) 

  • Unit No.2 Pressure suppression chamber inspection: 
      April 29th 
  • Unit No.2 Main transformer inspection (on-site transportation): 
      May 6th 
  • Unit No.5 House transformers inspection (5A) (on-site transportation): 
      April 29th 
  • Unit No.5 Excitation transformers inspection (on-site transportation): 
      April 29th 
  • Restoration work for filtrate tank No.3 and No.4 (No.4 water leakage test): 
      April 23rd*

 ○ Inspection and restoration to be commenced between May 9th to May 15th, 2008
    (To be commenced on the following date)

  • Unit No.1 Main transformer inspection (preparation for on-site transportation):
      May 9th 
  • Unit No.3 Main transformer inspection (preparation for transportation into 
    the factory): 
      May 12th 
  • Unit No.3 Main generator inspection (transportation of rotor): 
      May 15th 
  • Unit No.4 Stack inspection (detailed inspection for top of stack): 
      May 8th* 
  • Unit No.6 Turbine inspection (detailed inspection for high pressure turbine and 
    low pressure turbine (A) (B) and (C)): 
      May 12th 
  • Unit No.6 Main transformer inspection (carrying in and installation work): 
      April 30th* 
  • On-site check/inspection/restoration of the oil protection bank for the transformer 
    (Unit No.3 Recovery of oil-contaminated soil):
      May 9th 
  • Restoration and reinforcement work for on-site and outside roads, slope, etc. 
    (preparation work for reinforcement): 
      April 30th* 
  • Outdoor fire protection system piping to be placed above ground, installation of 
    fire protection tank, etc. (Arahama-side: work on installing fire protection system 
    piping above ground): 
      April 28th*
                                                       * Work schedules added this week.

 ○ Work Schedule of Major Inspection/Restoration from May 4th to May 31st, 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 24th to May 7th, 2008. 

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


 <Reports from Apr. 24 to May 7, 2008>


 ○ Other Findings 
  • 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, 
    April 3rd, April 10th and April 17th, 2008).
    No damage was found based on visual inspection for forks of 512 rotor blades on the 
    15th and 16th stage of the low-pressure turbine (B), both of which have the same 
    structure as those forks of rotor blades on the 14th stage (15th stage: 126 blades 
    each on generator-side and turbine-side; 16th stage: 130 blades each on generator-side 
    and turbine-side).
    Non-destructive inspection conducted for forks of 260 rotor blades of 16th stage of 
    the low-pressure turbine (B) resulted in indications on the fork of 18 rotor blades on 
    the generator-side and 19 rotor blades on the turbine-side.
    Investigation on the cause of the damages and the indications on the forks of rotor 
    blades will be continued. Non-destructive inspection for forks of rotor blades on the 
    15th stage of the low-pressure turbine (B) will also be conducted.

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 178KB)