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Title: Recovery of UO{sub 2}/PuO{sub 2} in IFR electrorefining process

Abstract

This invention is comprised of a process for converting PuO{sub 2} and U0{sub 2} present in an electrorefiner to the chlorides, by contacting the PuO{sub 2} and U0{sub 2} with Li metal in the presence of an alkali metal chloride salt substantially free of rare earth and actinide chlorides for a time and at a temperature sufficient to convert the U0{sub 2} and PuO{sub 2} to metals while converting Li metal to Li{sub 2}O. Li{sub 2}O is removed either by reducing with rare earth metals or by providing an oxygen electrode for transporting 0{sub 2} out of the electrorefiner and a cathode, and thereafter applying an emf to the electrorefiner electrodes sufficient to cause the Li{sub 2}O to disassociate to 0{sub 2} and Li metal but insufficient to decompose the alkali metal chloride salt. The U and Pu and excess lithium are then converted to chlorides by reaction with CdCl{sub 2}.

Inventors:
;
Issue Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10116699
Patent Number(s):
-US-A7967652
Application Number:
ON: DE95006132; PAN: 7-967,652;
Assignee:
ANL; SCA: 052001; 320305; PA: EDB-95:040707; SN: 95001320269
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 1992 Oct 28; Other Information: PBD: 1992; Related Information: U. S. Patent No. 5,356,605. Filed 10/18/1994
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PLUTONIUM OXIDES; ELECTROREFINING; URANIUM OXIDES; PLUTONIUM; MATERIALS RECOVERY; URANIUM; INVENTIONS; DESIGN; PLUTONIUM CHLORIDES; URANIUM CHLORIDES; 052001; 320305; WASTE PROCESSING; INDUSTRIAL WASTE MANAGEMENT

Citation Formats

Tomczuk, Z, and Miller, W E. Recovery of UO{sub 2}/PuO{sub 2} in IFR electrorefining process. United States: N. p., 1992. Web.
Tomczuk, Z, & Miller, W E. Recovery of UO{sub 2}/PuO{sub 2} in IFR electrorefining process. United States.
Tomczuk, Z, and Miller, W E. Wed . "Recovery of UO{sub 2}/PuO{sub 2} in IFR electrorefining process". United States. https://www.osti.gov/servlets/purl/10116699.
@article{osti_10116699,
title = {Recovery of UO{sub 2}/PuO{sub 2} in IFR electrorefining process},
author = {Tomczuk, Z and Miller, W E},
abstractNote = {This invention is comprised of a process for converting PuO{sub 2} and U0{sub 2} present in an electrorefiner to the chlorides, by contacting the PuO{sub 2} and U0{sub 2} with Li metal in the presence of an alkali metal chloride salt substantially free of rare earth and actinide chlorides for a time and at a temperature sufficient to convert the U0{sub 2} and PuO{sub 2} to metals while converting Li metal to Li{sub 2}O. Li{sub 2}O is removed either by reducing with rare earth metals or by providing an oxygen electrode for transporting 0{sub 2} out of the electrorefiner and a cathode, and thereafter applying an emf to the electrorefiner electrodes sufficient to cause the Li{sub 2}O to disassociate to 0{sub 2} and Li metal but insufficient to decompose the alkali metal chloride salt. The U and Pu and excess lithium are then converted to chlorides by reaction with CdCl{sub 2}.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}