Japan nuclear operations: Kansai Electric shuts Mihama No.3 reactor for safety checks

By Reuters News

- Kansai Electric Power 9503.T shut its 826-megawatt No. 3 reactor at the Mihama nuclear power station in western Japan on Friday after water droplets were detected in a high-pressure turbine feedwater heater, a company spokesperson said.

The company manually shut down the reactor for safety checks. It had restarted it last Saturday and had been offline since May for maintenance following a technical problem.

Kansai has not set a schedule for restarting the reactor, the spokesperson said.

As of Friday, Japan has 11 nuclear reactors in operation, with a combined capacity of 10,553 MW.

Many utilities are undergoing re-licensing to meet stricter safety standards implemented after the 2011 Fukushima disaster. Before the disaster, Japan operated a total of 54 reactors.

The table below shows the status of Japan's nuclear power plants.

The regional utilities are: Chubu Electric Power 9502.T, Chugoku Electric Power 9504.T, Hokkaido Electric Power 9509.T, Hokuriku Electric Power 9505.T, Kansai Electric Power 9503.T, Kyushu Electric Power 9508.T, Shikoku Electric Power 9507.T, Tohoku Electric Power 9506.T and Tokyo Electric Power (Tepco) 9501.T.

In the table, the companies are referred to by their regional names.

Japan Atomic Power Company (Japco), a nuclear energy company, owns two reactors.

Company

Plant

Unit

MW

Status

Hokkaido

Tomari

1

579

Shutdown 22/4/11

Hokkaido

Tomari

2

579

Shutdown 26/8/11

Hokkaido

Tomari

3

912

Shutdown 5/5/12

Tohoku

Onagawa

2

825

Online 18/5/26

Tohoku

Onagawa

3

825

Shutdown 11/3/11

Tohoku

Higashidori

1

1,100

Shutdown 6/2/11

Tepco

Kashiwazaki-Kariwa

1

1,100

Shutdown 6/8/11

Tepco

Kashiwazaki-Kariwa

2

1,100

Shutdown 16/7/07

Tepco

Kashiwazaki-Kariwa

3

1,100

Shutdown 16/7/07

Tepco

Kashiwazaki-Kariwa

4

1,100

Shutdown 16/7/07

Tepco

Kashiwazaki-Kariwa

5

1,100

Shutdown 25/1/12

Tepco

Kashiwazaki-Kariwa

6

1,356

Online 9/2/26

Tepco

Kashiwazaki-Kariwa

7

1,356

Shutdown 23/8/11

Chubu

Hamaoka

3

1,100

Shutdown 29/11/10

Chubu

Hamaoka

4

1,137

Shutdown 13/5/11

Chubu

Hamaoka

5

1,380

Shutdown 14/5/11

Hokuriku

Shika

1

540

Shutdown 1/3/11

Hokuriku

Shika

2

1,206

Shutdown 11/3/11

Kansai

Mihama

3

826

Shutdown 18/9/26

Kansai

Takahama

1

826

Online 30/11/25

Kansai

Takahama

2

826

Online 19/6/26

Kansai

Takahama

3

870

Shutdown 7/4/26

Kansai

Takahama

4

870

Online 16/10/25

Kansai

Ohi

3

1,180

Shutdown 8/8/26

Kansai

Ohi

4

1,180

Online 26/5/26

Chugoku

Shimane

2

820

Online 13/8/26

Shikoku

Ikata

3

890

Online 25/12/25

Kyushu

Genkai

3

1,180

Shutdown 30/6/26

Kyushu

Genkai

4

1,180

Online 17/10/25

Kyushu

Sendai

1

890

Online 21/12/25

Kyushu

Sendai

2

890

Online 28/3/26

Japco

Tokai Daini

1

1,100

Shutdown 11/3/11

Japco

Tsuruga

2

1,160

Shutdown 7/5/11

Total

33,083

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