Operation policy of Takahama Units 1 and 2 and Mihama Unit 3May 12,2021
Kansai Electric Power Co., Inc.

Today, as a result of carefully examining the process for restarting Takahama Units 1 and 2and Mihama Unit 3 from the viewpoint of giving top priority to safety, we have decided thefollowing operation policy.

【Takahama Unit 1】
Takahama Unit 1 will start fuel loading from May 14, and after that, we will carry out
voluntary inspections that can be carried out after fuel loading to confirm the soundness ofvarious equipment.
In addition, since it is necessary to put it in a cold shutdown state on June 9※, the reactor will
not be started, but we will continue to proceed with the construction of Specialized Safety
Facility (SSF) with the highest priority on safety, and restart after the construction iscompleted.
※ The deadline for completion of SSF at Takahama Units 1 and 2 is June 9, but it is assumed that thefacility will not be completed by the deadline. Therefore we have decided to put the reactor in cold
shutdown state by June 9 and accordingly informed the Nuclear Regulatory Agency (NRA) in writing.

【Mihama Unit 3】Mihama Unit 3 will start fuel loading from May 20, start the reactor and subsequently
connect to the grid in late June, and then perform a comprehensive load performance
inspection in late July before moving onto full-scale operation.
A careful and thorough inspection will be carried out before starting the reactor toprevent any kind of problems.
In addition, since the SSF construction will not be completed by October 25, which is thedeadline for installation, we will put the reactor in a cold shutdown state by the abovementioned date.

【Takahama Unit 2】
We will continue to prioritize safety improvement work and the SSF construction.
Takahama Unit 2 will restart after all the work is successfully completed.
Regarding the restart of Takahama 1 and 2 and Mihama Unit 3, we will never lose focus onsafety as the top priority and proceed with the necessary work. Similarly, we willcontinuously commit to safe and stable operation of other plants currently in service.
Attachment 1: The work process of Takahama Unit 1 and Mihama Unit 3（Translated by JANSI）

The work process in theTakahama Unit 1 andMihama Unit 3
May 12, 2021
Kansai Electric Power Co., Inc.

Work process such as inspection in Takahama Unit 1
Regulatory deadline for SSF completion
June 9Fuel loading start
May 14CompletedMay 17

Fuel loading

From reactor vessel assembly Approx. to cold function checkup, etc.

Fuelremoval

Fuel loading(Approx. 3 days)
Open reactor
vesselAssemble reactor vessel(Approx. 8 days)

In-core and ex-core instrumentationequipment operability checkup

Containment integrated leakage
rate test (Approx. 9 days)

Control rod drive mechanismand primary coolant pump
operability checkup◆◆

Safety overrides any requirements in the work process such as inspections.
Work schedule is subject to change depending on the progress of each work.

About the restart process of Mihama Unit 3
Fuel loading start
May 20CompletedMay 23

Reactor start: late June

From reactor vessel assembly to cold function checkup, etc.

Fuel loading

Assemblereactor vessel(Approx. 7 days)

In-core and ex-core
instrumentationequipment operability
checkup

Safety actions◆

Warm up andpressurize
primary coolant

Containment
integrated leakage
rate test (Approx. 8days)

Emergency diesel
generator inspection(Approx. 2 days)

Reactor start-up,
criticality,
Turbine start

Intensive
safetycheckup ①

Comprehensive examination(Approx. 3 days from late May to early June)

Fuel loading(Approx. 3 days)

Constant rated
thermal power:
Grid connection: early Julylate June

Criticality: late June

Pre-start valve
inspection(Approx. 3 days)

Intensive
safetycheckup ②

Startup test
(Approx. 10-11 days)

Final regulatory
inspection:late July

Generator connect to grid /controlled operation
Approx.
4 daysIntensive
safetycheckup ③

Controlled operation

Primary coolant systemleak inspection(Approx. 3 days)

Control rod drive mechanism
operability checkuporganization

ContentComprehensive
examination

Of approx. 200
peopleBefore warming up and pressurizing coolant systems,swe will carry out a comprehensive inspection to preclude
problems. We will dispatch engineers in the Ohi NPS who have experience of restart to the Mihama NPS andcarry out the work in cooperation with contractors and manufacturers.

Intensive safety
checkup

Of approx. 130
peopleBefore reactor start up and before/after connection to grid, we will carry out intensive safety checks to prevent
troubles in cooperation with contractors, manufacturers, and retired employees with restart experience.

The work schedule is subject to change depending on the progress of the work.