August 7, 2015
Kyushu Electric Power Company

Sendai Nuclear Power Station Unit 1: Plant status(Weekly report)
operations

This week results (Fri, July 31 – Thu, Aug 6)[Main process] The primary system (reactor system)Jul 31-Aug 1 CV leak rate test conducted
Aug 3 Functional tests startedAug 4-6 RCS heated up and pressurized The secondary system (turbine system) Cleanup completed (Started from Jul 15)[Tests and inspections] Operator’s self-inspection (periodical equipment inspection items)
 July 31 - Aug 1 CV leak rate test
 Aug 4 Reactor component cooling system functional test〃
ECCS functional test〃
CV safety system functional test〃
Emergency diesel generator functional test
 Aug 5 Class 1 components in-service inspection
 Aug 6 Class 2 components in-service inspection〃
MSSV functional test Regulatory inspection
 Aug 3 Inspection of SA training finished (Started from Jul 23)〃
Reactor start-up inspection started

Next week plans (Fri, Aug 7 – Thu, Aug 13)[Main process] The primary system (reactor system)Various functional tests continue
Reactor start-up (Aug 10 or later, depending on the preparation conditions)Core physics tests
 The secondary system (turbine system)
 Turbine start-up*[Tests and inspections] Operator’s self-inspection (periodical equipment inspection items)
 Aug 7
Class 1 components in-service inspection
 Aug 7-8 Class 2 components in-service inspection
 Aug 8Pressurizer relief valve leak test
 Aug 10* Control rod drive mechanism (CRDM) functional test〃
Auxiliary feedwater system functional test
 Aug 12* Shutdown margin test
 Aug 13* Steam turbine performance test Regulatory inspection
 Reactor start-up inspections*The schedule is subject to change due to reactor start-up conditions

Translated by JANSI: for the original text, please go to: http://www.kyuden.co.jp/var/rev0/0047/8626/news150807.pdf

Aug 7, 2015

Sendai 1: Restart operation process
Jul 7▼

Jul 20▼Jul10▼

Fuelloading

Jul 25▼

Aug 4-6▼RCS warm-up and pressurizing※Aug 3▼

RCS* leak
test

100%

Constant operation at
rated thermal output

Functional tests*Reactor coolant system

Jul 20▼Jul 13▼

Jul 26▼Aug 1▼

CV leak ratetest

RV assemblingCorephysics test

The above test periods include preparations

Jul 15▼

Jul 18▼Condenser Vacuum-up

Aug 5
▼

▽Reactor start-up ▽Connecting to grid
▽Turbine start-up

The secondary system cleanup

Process

Jul31, Aug1
▼CV leak rate test
Jul 23Aug 3▼＿＿＿＿＿＿＿▼Regulatory inspection (severe accident trainings)
Aug 3 onwards▼Regulatory inspection (reactor start-up)
Aug 4▼Reactor component cooling system, ECCS, CV safety system andEmergency DG functional tests
Aug 5▼Class 1 components in-service inspection
Aug 6▼Class 2 components in-service inspection, MSSV functional test
Aug 7
▽Class 1 components in-service inspection
Aug 7,8▽Class 2 components in-service inspection
Aug 8▽Pressurizer relief valve leak test
Aug 10※▽CRDM test, Auxiliary feedwater system test
Aug 12※※ The schedule after Aug 10 is subject to▽Shutdown margin testchange due to reactor start-up conditions.
Aug 13※▽Steam Turbine test

Translated by JANSI: for the original text, please go to: http://www.kyuden.co.jp/var/rev0/0047/8626/news150807.pdf