Attachment
Status of main inspection / restoration work at the Kashiwazaki Kariwa Nuclear Power Station
following the Niigataken Chuetsu-oki Earthquake in 2007 (4-week schedule as of September 13, 2007)
Red text: Changes from last week, Blue text: Information added this time
Unit

Unit 1

Facility / work
Ceiling crane in thereactor building
Refueling machine
Openinspection
on reactors

Phase 1
Internals（＊）

Unit 2

Unit 4

Unit 5

Unit 6・ Cause of damage being
Inspection scheduled for Inspection scheduled for Inspection scheduled for Inspection scheduled to Inspection scheduled for investigated8/20～9/17
8/27～10/4
8/20～9/14
commence in early October 9/3～10/1
・Inspection scheduled tocommence on 9/10
Inspection scheduled to Inspection scheduled for Inspection scheduled to Inspection scheduled to Inspection scheduled to Inspection scheduled tocommence in mid October
8/27～10/5
commence in mid November
commence in mid Octobercommence on 9/14
commence on 10/2
Inspection
8/21～23

conductedon

Inspection scheduled for
9/14～10/1
Inspection
preparation
Phase 3scheduled to commence on
10/2
Ceiling crane in theInspection scheduled for Inspection completed on
turbine building
8/20～10/26
8/24Inspection timing being
Turbine itself
coordinated・ Inspection on outdoor
sections scheduled forInspection scheduled for 9/10～15
Main exhaust ducts
9/10～15・ Exterior inspection on
ducts in the trenches
scheduled for 9/19
Exterior Completed on 8/29
inspection
Main
Ex-factory timing being
Oiltransformer extraction Inspectioncommencement coordinatedtiming being coordinated/ inner
inspection

Unit 7
Inspection
9/6

completedon

Inspection scheduled for
8/29～9/27
・Reactor opening scheduled
for early October・Inspection scheduled tocommence after the openingof the reactor

Phase 2Openinspe
ctiononturbi
nes

Oilextraction/ inner
inspection

Exterior
Excitation inspection
Oiltransformer
extraction/ inner
inspection
Processing of water leakage on the B5F
level of the reactor combinationbuilding

Inspection scheduled for Inspection scheduled for Inspection scheduled for Inspection scheduled for Inspection scheduled for
8/27～11/23
9/3～10/16
8/28～10/17
8/27～10/4
8/27～10/4
・ Inspection on outdoor
sections scheduled forInspection scheduled for 9/10～15
9/10～15・ Exterior inspection on
dusts in the trenches
scheduled for 9/19

・ Inspection on ourdoor
sections scheduled for9/10～15・ Exterior inspection on
ducts in the trenches
scheduled for 9/19

Inspectioncommencement Inspectioncommencementtiming being coordinatedtiming being coordinated――・Preparation scheduled for
9/14～10/3
Inspectioncommencement
・Preparation scheduled for scheduled for 9/14
10/4～6・3A：Inspection completed
on 9/4
・3B：Transfer scheduled for
9/20

Exterior
inspection
In-house
Transformer transformer

Unit 3

Preparation commencement
Inspectioncommencementtiming being coordinated
・1A：Inspection completed scheduled for 10/15
on 9/4
Preparation commencement
・1B：Inspection scheduledscheduled for 10/15
for 10/8～10/12

・Preparation scheduled for
9/7～18
・6A：Inspection scheduled
for 9/19～21・6B：Inspection scheduled
for 9/24～26

Preparation commencement Exterior
inspection
scheduled for 10/9
scheduled for 10/18､19

Inspectioncommencement
Inspectioncommencement timing being coordinatedscheduled for 10/27

Preparation scheduled for
10/13～10/18
Draining and cleanup ofpassageways
andfloor
areas underway――――――（＊）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
vessel flange 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 coreshroud (annulus). The dryer and 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 the reactor, after removing control rods, fuel supports and other items that could
interfere with the inspection.