for Japanese


1 May, 2015

Five NPPs in Japan Now Officially Designated for Decommissioning

At the end of April, five nuclear power plants (NPPs) in Japan were designated by their operators for decommissioning. On April 27, four of them were announced, including the Mihama-1 and -2 NPPs , owned and operated by the Kansai Electric Power Co. (Kansai EP), along with Genkai-1, owned and operated by the Kyushu Electric Power Co. and Tsuruga-1, owned and operated by the Japan Atomic Power Company (JAPC).

Mihama-1 and -2 are left

In addition, Shimane-1 was also designated by the Chugoku Electric Power Co. its owner and operator, for decommissioning on April 30.

Each designation was made in response to the 40-year limit on reactor operation imposed after the March 2011 accident at the Fukushima Daiichi Nuclear Power Station. With the five designations, the total number of domestic NPPs in Japan deemed still serviceable has been reduced to 43.

The actual decisions to decommission the five NPPs were made in March, after comprehensive considerations of all factors — including the power companies’ need to maintain supply capacities — were weighed against the time and cost needed for safety measures and the like. The power companies will henceforth carry out the necessary safety inspections toward the decommissioning.

On April 27, Kansai EP released a comment saying that it appreciated the understanding and cooperation of local communities during the many decades of operation of the two Mihama reactors it plans to decommission. It also announced a plan to carry out safety inspections of the emergency power generators and fuel storage facilities necessary for the decommissioning work. The inspections for that require about one month, and will start in early May.

While it decommissions the two reactors, Kansai EP continues to aim for the restart of its nine other NPPs in Fukui Prefecture, including Takahama-3 and -4, both of which have cleared examinations by the Nuclear Regulation Authority (NRA). It will maintain its policy of using nuclear power as its main power source.

Mihama-1 (PWR, 340 MWe) and -2 (PWR, 500 MWe) were commissioned in November 1970 and July 1972, respectively. In August 1970, during trial operations at an output of 10MWe, Unit 1 historically transmitted power to the site of Expo ’70 in Osaka. Kansai EP once considered steps to operate the two units for more that 40 years. It eventually determined, however, that the huge costs for safety measures could not be recovered due to the units’ low outputs, and instead decided to decommission them.

According to the power company, decommissioning costs for the two units are expected to run about JPY67 billion (USD563 million at USD1=JPY119). The decommissioning process is expected to require three decades or so. The company will cooperate in the work with a foreign company, to be chosen through bidding, that possesses relevant expertise.


This site uses Akismet to reduce spam. Learn how your comment data is processed.

SNS facebooktwitter

NPPs Map


“The current situation at Fukushima Daiichi NPS” -From 3.11 toward the future- (ver, July 2019)

8 July, 2019
“The current situation at Fukushima Daiichi NPS” -From 3.11 toward the future- (ver, July 2019)09:17

Recent News

8 November, 2019
EU to Ease Restrictions on Japanese Food Imports, Though Chief Cabinet Secretary Suga Asserts Japan Will Work Toward Their Full Elimination
28 October, 2019
OCCTO’s Electricity Supply and Outlook for Winter Sees Capacity Reserve Margin of 3 Percent Nationwide
23 October, 2019
Symposium with Students Held in Tsuruga City on Future Research and Test Reactors
17 October, 2019
JAIF Holds Women’s Symposium, with Presentations by Weathercaster and Professor
7 October, 2019
Fukushima Joban Products Fair Begins, Featuring Seafood Sent Directly to Restaurants in Tokyo-Yokohama Area
3 October, 2019
Kindai University, Hayakawa Rubber Develop Easily-molded Radiation Shielding Material
30 September, 2019
MEXT Minister Shares His Hopes with the Press, Seeking to Secure Human Resources Together with Universities
19 September, 2019
Minister of State for Science and Technology Policy Attends Opening Ceremony of Japan Booth at IAEA General Conference
19 September, 2019
At 63rd IAEA General Conference, Japanese Minister of State for Science and Technology Policy Stresses Need for Science-based Discussions on Decommissioning and Contaminated Water Measures
10 September, 2019
Symposium in Tokyo Looks at Taiwanese Energy Situation, and Discusses Fear and Misinformation about Foods Sourced in Fukushima