[en] The unified expression of the separation power and the overall separation factor, the cut and the concentration of the feed were derived. The influence of the three factors to the separation was described also. The results showed that the separation power increase along with the overall separation factor increase, the separation power can acquire the maximum value when the cut is about 0.5, the separation power is lower in the high feed concentration and the low feed concentration, and the maximum when the feed concentration is about 0.5. (authors)

[en] The description is given of a component for isotope separation by static centrifugation, the characteristic of which is that the gas, of single chemical composition, in other words without a diluting gas mixture, passes into a sonic collar then into a symmetrical supersonic diffuser where it acquires a uniform and rectilinear velocity above or very much above the speed of sound before going into its curved trajectory

[en] Apparatus for separating gaseous mixtures into fractions of different specific weight is claimed. There are a plurality of discs mounted parallel to each other on a common shaft for rotating the discs at a high speed. Each disc has an internal radially extending annular chamber with a radially inner inlet into which the gas mixture is supplied. There is at least one annular nozzle with a radially extending nozzle orifice dividing the chamber. A first passageway defined within the chamber radially outwardly of the nozzle orifice and in the plane of the nozzle orifice is for the passage of a heavy fraction of the gas mixture. A plurality of second passageways located laterally of the nozzle orifice is for the passage of a light fraction of the gas mixture

[en] As part of an effort to prevent the loss of and maximize the use of unique developments of the centrifuge program, this document identifies and briefly describes unclassified technologies potentially available for transfer. In addition, this document presents a preliminary plan for action needed to carry out the transfer activity. Continuing efforts will provide additional descriptions of technologies which have applications that are not as apparent or as obvious as those presented here. Declassification of some of the program information, now classified as restricted data, would permit the descriptions of additional technologies which have significant commercial potential. The following are major areas of technology where transfer opportunities exist: biomedical; separation; motors and control systems; materials; vacuum; dynamics and balancing; and diagnostics and instrumentation

[en] A bibliography is presented of the gas centrifuge literature published from 1983-1986 inclusive. It supplements PG Information Series 25(CA), BNFL Information Series 15(CA), BNFL Information Series 23 (CA), and BNFL Information Series 27(CA), which together cover the period 1895-1982. The main arrangement is chronological and there are author, report number, and subject indexes. (U.K.)

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[en] The gas centrifuge is expected to play a large role in the 30% increase of the U.S. uranium-enrichment capacity required by President Carter's antiproliferation policy. The basis for the gaseous centrifugation process is described: axial countercurrent circulation, Ekman suction, scoop, separative power, etc. The economics of the process are next discussed. Connections between units must be arranged in a configuration known as an ideal cascade in which gas streams of unequal isotopic composition are never mixed. 6 figures

[en] A very simple hypothetical model of the binary isotope separation process in a countercurrent Gas Centrifuge is proposed. Like the usual Cohen-Onsager separation theory it involves the internal fluid dynamics, but unlike the usual isotopic separation theory it completely obviates the usual flow integrals for Cohen's E. Thereby allowing an immediate estimate of the flow efficiency of a given design, which can and sometimes should be checked later by the usual analyses. To shed some light on our idea, two simple derivations for assumed idealized hydrodynamics are given, but a rigorous proof remains an open question. Then our hypothesis is tested against a battery of about 10 new ''exact'' formulas for E based upon analytical solutions to several variants of Onsager's pancake equation and found to be ''reasonably'' accurate and surprisingly robust. Finally, some limitations of our rule are explored

[en] A method of separating a gaseous-mixture feedstock including a compound of a light nuclear isotope and a compound of a heavy nuclear isotope is claimed. It comprises the steps of: (a) directing the gaseous-mixture feedstock into each cascade input of a principle group of cascades of gas centrifuges; (b) centrifugally processing the mixture with a plurality of enriching stages and a plurality of stripping stages of the cascade to separate it into light and heavy gaseous-mixture fractions; (c) conveying a first fraction to an input of an auxiliary cascade of gas centrifuges; (d) centrifugally processing the first fraction with the auxiliary cascade to separate it into an auxiliary light fraction and an auxiliary heavy fraction; (e) withdrawing at least a portion of a unit output fraction from one of the auxiliary light fraction and the auxiliary heavy fraction; (f) withdrawing at least a portion of a waste fraction from at least one of a heavy fraction produced by the principal group of cascades, the auxiliary light fraction, and the auxiliary heavy fraction; (g) withdrawing at least a portion of a product fraction from at least one of a light fraction produced by the principal group of cascades, the auxiliary light fraction, and the auxiliary heavy fraction. The fraction from which the portion of product fraction is withdrawn is enriched in the light isotope to approximately the mole fraction of the product fraction. Apparatus is also claimed