Die physikalischen Grundlagen der Uran235-Anreicherung nach dem Trenndüsenverfahren / The Physics of Uranium235-Enrichment in the Separation Nozzle Process

Abstract

The effects of the added light gases H2, He, and D2 on the separation of the uranium isotopes in the separation nozzle process are compared experimentally. The superiority of H2 under economically optimum conditions turns out to be caused essentially by its less dissipative nozzle flow characterized by a higher Reynolds number. This advantage is decreased if differences in the flow velocity lose their effects on isotope separation, e. g. at higher expansion ratios. Thus, with He added, the isotope separation effects can get closer to those observed with H2; D2 even can get better than H2, because He and D2 prevent more efficiently UF6 from concentrating rapidly at the outer nozzle wall.