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Title: Gas-centrifuge unit and centrifugal process for isotope separation

Abstract

An invention involving a process and apparatus for isotope-separation applications such as uranium-isotope enrichment is disclosed which employs cascades of gas centrifuges. A preferred apparatus relates to an isotope-enrichment unit which includes a first group of cascades of gas centrifuges and an auxiliary cascade. Each cascade has an input, a light-fraction output, and a heavy-fraction output for separating a gaseous-mixture feed including a compound of a light nuclear isotope and a compound of a heavy nuclear isotope into light and heavy fractions respectively enriched and depleted in the light isotope. The cascades of the first group have at least one enriching stage and at least one stripping stage. The unit further includes means for introducing a gaseous-mixture feedstock into each input of the first group of cascades, means for withdrawing at least a portion of a product fraction from the light-fraction outputs of the first group of cascades, and means for withdrawing at least a portion of a waste fraction from the heavy-fraction outputs of the first group of cascades. The isotope-enrichment unit also includes a means for conveying a gaseous-mixture from a light-fraction output of a first cascade included in the first group to the input of the auxiliarymore » cascade so that at least a portion of a light gaseous-mixture fraction produced by the first group of cascades is further separated into a light and a heavy fraction by the auxiliary cascade. At least a portion of a product fraction is withdrawn from the light fraction output of the auxiliary cascade. If the light-fraction output of the first cascade and the heavy-fraction output of the auxiliary cascade are reciprocal outputs, the concentraton of the light isotope in the heavy fraction produced by the auxiliary cascade essentially equals the concentration of the light isotope in the gaseous-mixture feedstock.« less

Inventors:
Publication Date:
OSTI Identifier:
5560318
Patent Number(s):
US 4167244
Application Number:
TRN: 80-002967
Assignee:
Exxon Nuclear Co., Inc.
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 11 Nov 1976
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; GAS CENTRIFUGES; DESIGN; URANIUM ISOTOPES; GAS CENTRIFUGATION; ISOTOPE SEPARATION; ACTINIDE ISOTOPES; CENTRIFUGATION; CENTRIFUGES; CONCENTRATORS; ISOTOPES; SEPARATION PROCESSES; 050502* - Nuclear Fuels- Uranium Enrichment- Centrifugation- (-1989)

Citation Formats

Stark, T M. Gas-centrifuge unit and centrifugal process for isotope separation. United States: N. p., 1979. Web.
Stark, T M. Gas-centrifuge unit and centrifugal process for isotope separation. United States.
Stark, T M. Tue . "Gas-centrifuge unit and centrifugal process for isotope separation". United States.
@article{osti_5560318,
title = {Gas-centrifuge unit and centrifugal process for isotope separation},
author = {Stark, T M},
abstractNote = {An invention involving a process and apparatus for isotope-separation applications such as uranium-isotope enrichment is disclosed which employs cascades of gas centrifuges. A preferred apparatus relates to an isotope-enrichment unit which includes a first group of cascades of gas centrifuges and an auxiliary cascade. Each cascade has an input, a light-fraction output, and a heavy-fraction output for separating a gaseous-mixture feed including a compound of a light nuclear isotope and a compound of a heavy nuclear isotope into light and heavy fractions respectively enriched and depleted in the light isotope. The cascades of the first group have at least one enriching stage and at least one stripping stage. The unit further includes means for introducing a gaseous-mixture feedstock into each input of the first group of cascades, means for withdrawing at least a portion of a product fraction from the light-fraction outputs of the first group of cascades, and means for withdrawing at least a portion of a waste fraction from the heavy-fraction outputs of the first group of cascades. The isotope-enrichment unit also includes a means for conveying a gaseous-mixture from a light-fraction output of a first cascade included in the first group to the input of the auxiliary cascade so that at least a portion of a light gaseous-mixture fraction produced by the first group of cascades is further separated into a light and a heavy fraction by the auxiliary cascade. At least a portion of a product fraction is withdrawn from the light fraction output of the auxiliary cascade. If the light-fraction output of the first cascade and the heavy-fraction output of the auxiliary cascade are reciprocal outputs, the concentraton of the light isotope in the heavy fraction produced by the auxiliary cascade essentially equals the concentration of the light isotope in the gaseous-mixture feedstock.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {9}
}