A uranium enrichment method that separates the fissile isotope uranium-235 from natural uranium and increases its abundance ratio. Uranium hexafluoride gas is placed inside a rapidly rotating cylinder, and centrifugal force is used to separate the smaller mass of uranium-235 from the larger mass of uranium-238. To enrich it to a practical level, it is necessary to use multiple centrifuges, but this method is more efficient than the gas diffusion method, requires fewer stages, and consumes relatively little electricity, so highly enriched uranium can be obtained in small factories. (→Uranium, Uranium enrichment) Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
天然ウランから核分裂性同位体のウラン235を分離し,その存在比を高めるウラン濃縮法の一つ。高速で回転している円筒の中に六フッ化ウランのガスを入れ,遠心力を利用して質量の小さなウラン235と大きなウラン238を分離させる。実用レベルまで濃縮するためには遠心分離機に何段もかける必要があるが,ガス拡散法よりも濃縮効率がよく,段数は少なくてすみ,電力消費も比較的少ないので,小規模な工場で高濃縮ウランが得られる。(→ウラン,ウラン濃縮)
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