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.
Inspection/Restoration Status
○ Inspection and restoration completed between July 18th to July 24th, 2008
(Completed on the following date)
Unit No.1 Inspection of reactor recirculation piping applicable to the
Fitness-for-Service rule:
To be completed on July 24th
Unit No.2 500kV power cable inspection (Removal of cables):
July 18th
Unit No.3 Core shroud inspection and preventive maintenance (Preventive
maintenance):
July 18th
Unit No.3 Stack inspection (Detailed inspection for top of stack):
To be completed on July 24th
Unit No.4 Excitation transformer inspection (Internal inspection):
July 23rd
○ Inspection and restoration to be commenced between July 25th to July 31st, 2008
(To be commenced on the following date)
Unit No.1 Stack inspection (Unit No. 1 and No. 2) (Internal inspection
of stack):
July 28th
Unit No.3 Main exhaust duct inspection and restoration (Preparation for
restoration work):
July 23rd*
Unit No.4 House transformer inspection (4B) (Preparation for transportation
into the factory):
July 22nd*
Unit No.4 Excitation transformer inspection (Preparation for transportation
into the factory):
July 24th*
On-site check, inspection and restoration of the oil protection bank for the
transformer (Unit No.1 Recovery of oil-contaminated soil):
July 29th
Inspection of spent fuel transportation cask storage facility (Inspection for
substructure of piles):
July 25th
* Work schedules added this week.
○ Work Schedule of Major Inspection/Restoration from July 20th to August 16th, 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
(Reference)
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 July 17th to July 23rd, 2008.
○ Incidents Information (relating to the Chuetsu-Oki Earthquake)
|
< Reports from July 17 to July 23, 2008 >
|
○ Other Findings
Unit No.6
Visual inspection was conducted for forks of 260 rotor blades on the 16th stage of
the low-pressure turbine (C) (130 blades each on generator-side and turbine-side).
As a result, no damage was found. Additionally, non-destructive investigation resulted
in indications on the forks of 4 rotor blades on the turbine-side. Indication was not
found on the generator-side.
While confirming contamination of damaged pallets in the solid waste storage warehouse
to have them stored on site, a minuscule amount of radioactive material -- about 1.4
Becquerel/cm2 -- was found on one of the pallets on July 17, 2008. The pallet has been
covered by a sheet and is stored in the solid waste storage warehouse.
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 46.8KB)
|