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

1. Inspection/Restoration Status

 ○ Inspection and restoration completed between October 19th to October 25th, 2007
  • Unit No.2 Reactor head opening: 
      Work completed on October 24th 
  • Unit No.3 House transformers (3A) oil extraction and internal inspection: 
      Inspection completed on October 22nd 
  • Unit No.5 Refueling machine inspection:
      Inspection completed on October 19th 
  • Unit No.5 Refueling floor service tools inspection (stud tensioners, etc.): 
      Inspection completed on October 19th
  • Unit No.6 Turbine internal inspection:
      Inspection planned to be completed on October 25th
  • Unit No.6 House transformers transportation into the factory:
      Transportation planned to be completed on October 25th
  • Unit No.7 Main transformers transportation into the factory:
      Transportation planned to be completed on October 25th
  • Low-voltage start-up transformer 3SA oil extraction and internal inspection: 
      Inspection planned to be completed on October 25th
  • On-site maintenance work:
      Work completed on October 22nd

 ○ Inspection and restoration to be commenced between to October 26th to 
    November 1st, 2007. 
  • Unit No.1, 3 and 5 Reactor pressure vessel inspection preparation
  • Unit No.1 Main transformers visual inspection
  • Unit No.1 Main transformers oil extraction and internal inspection preparation
  • Unit No.2 Main transformers preparation for transportation into the factory
  • Unit No.2 House transformers (2B) visual inspection, oil extraction, internal 
    inspection and visual inspection preparation
  • Unit No.3 Excitation transformers oil extraction and internal inspection
  • Unit No.5 Internal inspection
  • Unit No.5, 6 and 7 Reactor pressure vessel inspection
  • Unit No.7 Reactor-well inspection (to be commenced on Oct. 25th)
  • Unit No.7 Main generator inspection

 ○ Work Schedule for Major Inspection/Restoration from October 21st to November 
    17th, 2007
  • Work Schedule of the Main Inspection/Restoration of 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 October 18th to October 24th, 2007 and the 
   occurrence status of nonconformances (that have been deliberated) reported from 
   October 11th to October 23rd, 2007.

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


 <Reports from October 18th to October 24th, 2007>


○ Information on Nonconformances (those related to: the Chuetsu-Oki Earthquake; 
   Grades As, A, B, C, and D; and non-graded)


 ○ Other Findings
  • Unit No.7
    We have completed removing fuel assemblies on Oct. 23rd.

  • Unit No.7
    At 11:37p.m. on Oct.24th, we could extract the control rod which had not been 
    able to extract (announced on Oct.18th, 2007). The rod was extracted through 
    the ordinary way that was ruled in advance. We will conduct the research why 
    the rod could not be extracted the first time we tried.

  • As a part of investigation on water ingress into the unit No.7 reactor well 
    liner drain pipe, we are conducting a status check for all large-size tanks 
    that contain radioactivity including spent fuel pools for all units. As of 
    today, no leakage from reactor well liners etc. has been confirmed except 
    for unit No.7. However, since water ingress into the unit No.7 liner drain 
    pipe continues and water spillage due to sloshing in the spent fuel pool 
    induced by the seismic motion occurred in the refueling floor of all units, 
    there is a possibility of water ooze happening in other walls. Hence, we will 
    continue monitoring for any leakage by way of plant walk-down, etc. 
    In unit No.1, water ooze containing a minute amount of radioactive material 
    was found in the spent fuel pool wall located below the reactor building 
    refueling floor. We will continue monitoring.

Appendix: Work Schedule of the Main Inspection/Restoration of Kashiwazaki-Kariwa Nuclear 
          Power Station in Response to the Niigata-Chuetsu-Oki Earthquake
          (during 4 Weeks)(PDF 225KB)