…However, since it does not require any advanced technology other than the manufacture of the diaphragm, it was the only method suitable for large-scale uranium enrichment for nearly 40 years since its use in the Manhattan Project for the manufacture of atomic bombs, which was carried out in the United States in the 1940s. Since then, with the background of advanced technological developments in various fields, gas centrifuge methods, aerodynamic separation methods (nozzle method and helicon method), etc. have become competitive with gas diffusion methods, and the methods of uranium enrichment adopted in countries around the world have become more diverse. The gas centrifuge method is a method of uranium enrichment that utilizes the fact that when UF6 gas is supplied into a rotating cylinder, the light 235 UF6 tends to be distributed around the center axis and the heavy 238 UF6 tends to be distributed around the periphery of the rotating cylinder due to the centrifugal force generated there. … *Some of the terminology used in reference to "aerodynamic separation method" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…しかし,隔膜の製造以外はそれほど高度な技術を要しないため,1940年代にアメリカで遂行された原子爆弾製造のためのマンハッタン計画で使用されて以来,40年近くにわたって大規模なウラン濃縮に適する唯一の方法であった。 その後,諸分野における技術の高度な進展を背景に,ガス遠心分離法,空気力学的分離法(ノズル法やヘリコン法)等がガス拡散法と競合しうるようになってきて,世界各国で採用されるウラン濃縮の方法も多様化するにいたった。 ガス遠心分離法は,回転する円筒内にUF6ガスを供給すると,そこに生ずる遠心力の作用で,軽い235UF6は中心軸あたりに,重い238UF6は回転胴周辺部にそれぞれ片寄って分布しようとすることを利用して,ウラン濃縮を行う方法である。… ※「空気力学的分離法」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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