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In 2012, Japan was reported to have 9 tonnes of plutonium stored in Japan, which would be enough for more than 1,000 nuclear warheads, and an additional 35 tonnes stored in Europe. [ 38 ] [ 39 ] It has constructed the Rokkasho Reprocessing Plant , which could produce further plutonium. [ 38 ]
The Rokkasho Nuclear Fuel Reprocessing Facility (六ヶ所村核燃料再処理施設, Rokkasho Kakunenryō Saishori Shisetsu) is a nuclear reprocessing plant with an annual capacity of 800 tons of uranium or 8 tons of plutonium. [1] It is owned by Japan Nuclear Fuel Limited (JNFL) and is part of the Rokkasho complex located in the village of ...
The demon core (like the core used in the bombing of Nagasaki) was, when assembled, a solid 6.2-kilogram (14 lb) sphere measuring 8.9 centimeters (3.5 in) in diameter.. It consisted of three parts made of plutonium-gallium: two hemispheres and an anti-jet ring, designed to keep neutron flux from "jetting" out of the joined surface between the hemispheres during implosi
In 2018 the Japanese Atomic Energy Commission updated plutonium guidelines to try to reduce plutonium stockpiles, stipulating that the Rokkasho Reprocessing Plant should only produce the amount of plutonium required for MOX fuel for Japan's nuclear power plants.
On 6 and 9 August 1945, the United States detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki, respectively.The bombings killed between 150,000 and 246,000 people, most of whom were civilians, and they remain the only use of nuclear weapons in an armed conflict.
Takeshi Ebisawa, 60, of Japan, pleaded guilty in Manhattan, New York, to conspiring with a network of associates to traffic nuclear materials, including uranium and weapons-grade plutonium, from ...
A big reason the lab is working toward producing 30 fresh plutonium cores is some federal scientists and nuclear security officials contend the Cold War pits have grown too old to be reliable ...
Plutonium recovered from LWR spent fuel, while not weapons grade, can be used to produce nuclear weapons at all levels of sophistication, [25] though in simple designs it may produce only a fizzle yield. [26] Weapons made with reactor-grade plutonium would require special cooling to keep them in storage and ready for use. [27]