Abstract Uranium isotope separation in countercurrent vortex tubes has been investigated experimentally using a mixture of uranium hexafluoride and a light auxiliary gas as the feed gas. A minimum value of 7000 kW h/SW U was obtained for the ideal specific energy consumption which is higher by a factor of 2.7 than the corresponding value of the separation nozzle. Further specific expenditures for this type of vortex tube, e.g. the suction volume and the length of separator required per unit separative work have been found to be also unfavorably high in view of a commercial application.

Abstract The Separation nozzle process for enrichment of U235 is based on the mass-dependent centrifugal force generated in a curved flow of a UF6/He or UF6/H2 mixture. It is shown that the experimentally determined separation effects can exceed those calculated for equilibrium separation in a stream flowing with an infinite velocity. A numerical analysis of the ternary diffusion process indicates that the separation of the UF6 isotopes is improved by the fact that the added light gas prevents the UF6 from concentrating rapidly at the boundary of the centrifugal field.

Abstract Einem von einer Unterbrecherscheibe kurzzeitig freigegebenen kondensierten Stickstoffmole-kularstrahl wird ein Elektronenstrahl koaxial entgegengeschickt. Es zeigt sich, daß der divergent aus der Kanone austretende Elektronenstrahl nach Erreichen des kondensierten Molekularstrahls zur Strahlachse hin umgelenkt und im Molekularstrahl gesammelt wird. Die von dem Elektronen-strahl im kondensierten Molekularstrahl hervorgerufene Ionisierung reicht aus, um eine elektrische Entladung im kondensierten Molekularstrahl zu zünden.