Japan has none of its 50 reactors operating as of today after its sole operating nuclear unit was halted for planned maintenance last week.

Hokkaido Electric Power Co. shut the No. 3 unit at its Tomari plant in northern Japan on May 5 as scheduled, leaving the country without an operating reactor for the first time since May 1970.

Tokyo Electric Power Co. removed the four reactors at its Fukushima Dai-Ichi nuclear station from its operational list on April 19 due to damage caused by the March 11 quake and tsunami.

The following table shows the status of the 50 reactors with capacity of 46,148 megawatts operated by Japanese power companies. Capacity figures are in megawatts.

COMPANY
UNIT  CAPACITY  STATUS
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Hokkaido Electric Power Co.
Tomari
No. 1   579     Shutdown for maintenance. Restart not decided
No. 2   579     Shutdown for maintenance. Restart not decided
No. 3   912     Shutdown for maintenance. Restart not decided

Tohoku Electric Power Co.
Onagawa
No. 1   524     Shutdown after quake, tsunami
No. 2   825     Shutdown before quake, tsunami
No. 3   825     Shutdown after quake, tsunami
Higashidori
No. 1   1,100   Shutdown before quake, tsunami

Tokyo Electric Power Co.
Fukushima Dai-Ichi
No. 5   784     Shutdown before quake, tsunami
No. 6   1,100   Shutdown before quake, tsunami
Fukushima Dai-Ni
No. 1   1,100   Shutdown after quake, tsunami
No. 2   1,100   Shutdown after quake, tsunami
No. 3   1,100   Shutdown after quake, tsunami
No. 4   1,100   Shutdown after quake, tsunami
Kashiwazaki Kariwa
No. 1   1,100   Shutdown for maintenance. Restart not decided
No. 2   1,100   Shutdown after 2007 quake
No. 3   1,100   Shutdown after 2007 quake
No. 4   1,100   Shutdown after 2007 quake
No. 5   1,100   Shutdown for maintenance. Restart not decided
No. 6   1,356   Shutdown for maintenance. Restart not decided
No. 7   1,356   Shutdown for maintenance. Restart not decided

Chubu Electric Power Co.
Hamaoka
No. 3   1,100   Shutdown to strengthen quake/tsunami defenses
No. 4   1,137   Shutdown to strengthen quake/tsunami defenses
No. 5   1,380   Shutdown to strengthen quake/tsunami defenses

Hokuriku Electric Power Co.
Shika
No. 1    540    Shutdown for maintenance. Restart not decided
No. 2    1,206  Shutdown for maintenance. Restart not decided

Kansai Electric Power Co.
Mihama
No. 1    340    Shutdown for maintenance. Restart not decided
No. 2    500    Shutdown for maintenance. Restart not decided
No. 3    826    Shutdown for maintenance. Restart not decided
Ohi
No. 1    1,175  Shutdown for maintenance. Restart not decided
No. 2    1,175  Shutdown for maintenance. Restart not decided
No. 3    1,180  Shutdown for maintenance. Restart not decided
No. 4    1,180  Shutdown for maintenance. Restart not decided
Takahama
No. 1    826    Shutdown for maintenance. Restart not decided
No. 2    826    Shutdown for maintenance. Restart not decided
No. 3    870    Shutdown for maintenance. Restart not decided
No. 4    870    Shutdown for maintenance. Restart not decided

Chugoku Electric Power Co.
Shimane
No. 1    460    Shutdown for maintenance. Restart not decided
No. 2    820    Shutdown for maintenance. Restart not decided

Shikoku Electric Power Co.
Ikata
No. 1    566    Shutdown for maintenance. Restart not decided
No. 2    566    Shutdown for maintenance. Restart not decided
No. 3    890    Shutdown for maintenance. Restart not decided

Kyushu Electric Power Co.
Genkai
No. 1    559    Shutdown for maintenance. Restart not decided
No. 2    559    Shutdown for maintenance. Restart not decided
No. 3    1,180  Shutdown for maintenance. Restart not decided
No. 4    1,180  Shutdown for maintenance. Restart not decided
Sendai
No. 1    890    Shutdown for maintenance. Restart not decided
No. 2    890    Shutdown for maintenance. Restart not decided

Japan Atomic Power Co.
Tsuruga
No. 1    357    Shutdown for maintenance. Restart not decided
No. 2    1,160  Shutdown for maintenance. Restart not decided
Tokai Dai-Ni
No. 1    1,100  Damaged in March earthquake and tsunami
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Sources: Hokkaido Electric, Tohoku Electric, Tokyo Electric, Chubu Electric, Hokuriku Electric, Kansai Electric, Chugoku Electric, Shikoku Electric, Kyushu Electric, Japan Atomic Power.

To contact the reporter on this story: Tsuyoshi Inajima in Tokyo at tinajima@bloomberg.net

To contact the editor responsible for this story: Amit Prakash at aprakash1@bloomberg.net