Chugoku Electric Power TSE:9504 shut the 820-megawatt (MW) No.2 reactor at its Shimane nuclear power station in western Japan on February 9 for scheduled maintenance and refuelling, a company spokesperson said on Monday.
The unit is scheduled to restart in early August, the spokesperson said, adding that the maintenance period is longer than usual to accommodate construction work related to anti-terrorism upgrades.
Meanwhile, Tokyo Electric Power (TEPCO) TSE:9501 restarted the 1,356-MW No. 6 reactor at the Kashiwazaki-Kariwa nuclear power plant in northern Japan on February 9 after a malfunction caused a stoppage last month.
TEPCO shut down the No. 6 reactor after a malfunction was detected in late January, shortly after the unit went online for the first time in about 14 years.
Kyushu Electric Power TSE:9508 also shut the 890-MW No.2 reactor at its Sendai nuclear power station in southern Japan on January 24 for scheduled maintenance, with plans to bring it back online in late March, according to a company spokesperson.
Kansai Electric Power TSE:9503 shut the 826-MW No.2 reactor at its Takahama nuclear power station in western Japan on January 23 for scheduled maintenance, with plans to restart the unit in mid-June, a company spokesperson said.
As of Monday, Japan has 12 reactors in operation, with a combined capacity of 12,073 MW.
Many utilities are undergoing re-licensing to meet stricter safety standards implemented after the 2011 Fukushima disaster. Prior to 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 TSE:9502, Chugoku Electric Power TSE:9504, Hokkaido Electric Power TSE:9509, Hokuriku Electric Power TSE:9505, Kansai Electric Power TSE:9503, Kyushu Electric Power TSE:9508, Shikoku Electric Power TSE:9507, Tohoku Electric Power TSE:9506 and Tokyo Electric Power (Tepco) TSE:9501.
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 5/12/24
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
Online 21/5/25
Kansai
Takahama
1
826
Online 30/11/25
Kansai
Takahama
2
826
Shutdown 23/1/26
Kansai
Takahama
3
870
Online 1/6/25
Kansai
Takahama
4
870
Online 16/10/25
Kansai
Ohi
3
1,180
Online 14/8/25
Kansai
Ohi
4
1,180
Online 20/2/25
Chugoku
Shimane
2
820
Shutdown 9/2/26
Shikoku
Ikata
3
890
Online 25/12/25
Kyushu
Genkai
3
1,180
Online 13/6/25
Kyushu
Genkai
4
1,180
Online 17/10/25
Kyushu
Sendai
1
890
Online 21/12/25
Kyushu
Sendai
2
890
Shutdown 24/1/26
Japco
Tokai Daini
1
1,100
Shutdown 11/3/11
Japco
Tsuruga
2
1,160
Shutdown 7/5/11
Total
33,083