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Posted by Energetic
The Tōkai Nuclear Power Plant was Japan's first nuclear power plant. It was built in the early 1960s to the British Magnox design, and generated power from 1966 until it was decommissioned in 1998. A second nuclear plant, built at the site in the 1970s, was the first in Japan to produce over 1000 MW of electricity, and still produces power as of 2009. The site is located in Tokai in the Naka District in Ibaraki Prefecture, Japan and is operated by the Japan Atomic Power Company.
|Unit||Type||Average electric power||Capacity||Construction started||Construction completed||First criticality||Closure|
|Tōkai I||Magnox (GCR)||159 MW||166 MW||March 1, 1961||November 10, 1965||July 25, 1966||March 31, 1988|
|Tōkai II||BWR||1060 MW||1100 MW||October 3, 1973||March 13, 1978||November 28, 1978|
This reactor was built based on British developed Magnox technology. Unit 1 will be the first nuclear reactor to be decommissioned in Japan. The experience in decommissioning this plant is expected to be of use in the future when more Japanese plants are decommissioned. Below is a brief time-line of the process.
This Boiling Water Reactor was the first nuclear reactor built in Japan to produce over 1000 MW of electricity. By some formalities in the paperwork, the unit is technically separate from the rest of the nuclear facilities at Tokai-mura, but it is managed with the rest of them and even shares the same front gate. The power produced at the unit is sold by both the Tokyo Electric Company and the Tohoku Electric Company.
The number 2 reactor at Tōkai Nuclear Power Plant was shut down automatically. On 14 March it was reported that a cooling system pump for this reactor had stopped working; however, the Japan Atomic Power Company stated that there was a second operational pump sustaining the cooling system, but that two of three diesel generators used to power the cooling system were out of order.