Information of Kashiwazaki-Kariwa Nuclear Power Station (The 8th news)－Status of main inspection and restoration work (1) －Japan Nuclear Technology InstituteRev. 0
September 19, 2007

At present, the Kashiwazaki Kariwa Nuclear Power Station is systematically and steadily
undertaking detailed inspections and restoration work on its equipment and facilities, with theresults of the inspections to be released as they become available.

JANTI will summarize thefindings and release them in coming months. This Report #8 introduces the current status of main
inspection and restoration work.
Report #6 provided the “update on the overall situation through to August 10”. Our next reportwill give another update on subsequent progress made.

１．Status of main inspection and restoration work
（１）Completed items
UnitInspection equipment

Completion dateUpper reactor (Phase 1 of the in-coreCompleted on August 23 (See Section 2inspection)

for details.)

Main transformer
Unit 1In-house transformer (1A)
Operating floor service tool (workingdolly)
Unit 2

Ceiling crane in the turbine building

Unit 3In-house transformer (3A)

Unit 7

Ceiling crane in the reactor building

Exterior inspection completed onAugust 29
Internal inspection completed on
September 4Completed on September 13
Inspection completed on August 24
Exterior inspection completed on
September 4Completed on September 6（２）Overall status
The overall status of inspection and restoration work is listed in the attachment.
overall status will be revised as the work progresses.

The２．In-core inspection（１）Inspection policy○ Tokyo Electric Power Company commenced inspection work on Unit 1, which was in the midstof outage and had its reactor pressure vessel head already opened, and Unit 7, which has adifferent type of reactor (ABWR) to Unit 1. Using underwater lighting and underwater cameras,
visual inspection is conducted on reactor internals from refueling machines or working dollies
to check for damage, significant deformation and dislodgment or other abnormalities inmechanical joints (such as bolts and mating parts).
○ Visual inspection will also be carried out from above fuel structures at all plants that
had fuel loaded in their reactors at the time of the earthquake (Units 2 to 7) to identify
any damage or significant disfigurement of fuel assemblies and control rods.
（２）Overall inspection schedule (planned):Excerpt from TEPCO press release dated September 6（３）Inspection results○ In-core inspection (Phase 1) was conducted on Unit 1 from August 21 to 23, to find no damage,deformation or dislodgment of parts.
○ In-core inspection (Phase 2: Inspection of the mid reactor --- the reactor core) on Unit
1 is scheduled for September 14 to October 1.

【Reference】<Phase 1 (Inspection of the upper reactor)>
The internals of a reactor are visually checked from above with an underwater camera, before
the implementation of further inspection on the area extending from the reactor pressure vesselflange to the upper grid plate, with the aim of checking the internal status of the reactor.
<Phase 2 (Inspection of the mid reactor --- the reactor core)>
An underwater camera is used to visually check the area extending from the upper grid plate to
the core support plate, as well as the outer circumference of the core shroud (annulus). The dryerand separator, removed from the core, are also examined.
<Phase 3 (Inspection of the bottom of the reactor)>
Inspection is carried out on the area extending from the core support plate to the bottom of thereactor, after removing control rods, fuel supports and other items that could interfere with theinspection.
Related information on in-core inspection on Unit 1 (posted on the TEPCO website)
Status of in-core inspection：http://www.tepco.co.jp/nu/kk-np/chuetsu/k1ronai-j.html
Inspection schedule:http://www.tepco.co.jp/nu/kk-np/chuetsu/newsatom/190913n.pdf
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