nuclear-news

Some 890 tons of Tepco nuclear fuel kept at Aomori reprocessing plant

Aomori – Nov 1, 2025,
https://www.japantimes.co.jp/news/2025/11/01/japan/tepco-nuclear-fuel-aomori-plant/

Some 890 tons of spent nuclear fuel from Tokyo Electric Power Company Holdings are being stored at Japan Nuclear Fuel’s reprocessing plant under construction in Aomori Prefecture — the first time a specific amount of nuclear fuel at the plant from an individual company has been confirmed.

Also kept at the nuclear fuel reprocessing plant in the village of Rokkasho are about 180 tons of fuel from Japan Atomic Power.

Both numbers were included in the Aomori Prefectural Government’s answer dated Oct. 7 to a questionnaire from a civic organization in the prefecture. The prefecture’s answer was based on explanations from Tepco and Japan Atomic Power

The plant keeps a total of 2,968 tons of used nuclear fuel.

The plant, planned to be completed in fiscal 2026, will start to extract plutonium from used nuclear fuel once it becomes operational.

Under the principle of the peaceful use of plutonium, the Japanese government has a policy of not possessing the radioactive material unless there are specific purposes for it such as use for uranium-plutonium mixed oxide (MOX) fuel, because it can be used to make nuclear weapons.

With none of the nuclear reactors at Tepco and Japan Atomic Power having restarted and neither companies having clear plans to start so-called pluthermal power generation using MOX fuel, there are concerns that a situation may occur in which Japan possesses plutonium without specific purposes.

In the prefecture’s answer to the questionnaire, Tepco said that it “plans to implement pluthermal power generation at one of its reactors based on a policy that it will consume plutonium definitely.”

The firm also said it assumes that some plutonium will be supplied to a nuclear plant of Electric Power Development, better known as J-Power, which is now being constructed in the town of Oma, Aomori Prefecture. The Oma plant is expected to use MOX fuel at all reactors.

“There is no change in our policy to use our plutonium with our responsibility,” Japan Atomic Power said.

Contacted by reporters, Tepco offered the same explanation as that given to the Aomori government.

Meanwhile, Japan Atomic Power said that it plans to conduct pluthermal power generation at the Tsuruga nuclear power station’s No. 2 reactor in Fukui Prefecture and at the Tokai nuclear plant in Ibaraki Prefecture, although when this would start has yet to be decided.

November 5, 2025 - Posted by Christina Macpherson | - plutonium, Japan