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Title: Cerium, uranium, and plutonium behavior in glass-bonded sodalite, a ceramic nuclear waste form.

Abstract

Glass-bonded sodalite is being developed as a ceramic waste form (CWF) to immobilize radioactive fission products, actinides, and salt residues from electrometallurgical treatment of spent nuclear reactor fuel. The CWF consists of about 75 mass % sodalite, 25 mass % glass, and small amounts of other phases. This paper presents some results and interpretation of physical measurements to characterize the CWF structure, and dissolution tests to measure the release of matrix components and radionuclides from the waste form. Tests have been carried out with specimens of the CWF that contain rare earths at concentrations similar to those expected in the waste form. Parallel tests have been carried out on specimens that have uranium or plutonium as well as the rare earths at concentrations similar to those expected in the waste forms; in these specimens UCl{sub 3} forms UO{sub 2} and PuCl{sub 3} forms PuO{sub 2}. The normalized releases of rare earths in dissolution tests were found to be much lower than those of matrix elements (B, Si, Al, Na). When there is no uranium in the CWF, the release of cerium is two to ten times lower than the release of the other rare earths. The low release of ceriummore » may be due to its tetravalent state in uranium-free CWF. However, when there is uranium in the CWF, the release of cerium is similar to that of the other rare earths. This trivalent behavior of cerium is attributed to charge transfer or covalent interactions among cerium, uranium, and oxygen in (U,Ce)O{sub 2}.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
11916
Report Number(s):
ANL/CMT/CP-99703
TRN: US0102287
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 22nd Rare Earth Research Conference, Argonne, IL (US), 07/10/1999--07/15/1999; Other Information: PBD: 3 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 36 MATERIALS SCIENCE; CERAMICS; CERIUM; GLASS; PLUTONIUM; HIGH-LEVEL RADIOACTIVE WASTES; URANIUM; WASTE FORMS; MICROSTRUCTURE; DISSOLUTION; RADIONUCLIDE MIGRATION; RARE EARTHS; CONCENTRATION RATIO

Citation Formats

Lewis, M. A., Lexa, D., Morss, L. R., and Richmann, M. K. Cerium, uranium, and plutonium behavior in glass-bonded sodalite, a ceramic nuclear waste form.. United States: N. p., 1999. Web.
Lewis, M. A., Lexa, D., Morss, L. R., & Richmann, M. K. Cerium, uranium, and plutonium behavior in glass-bonded sodalite, a ceramic nuclear waste form.. United States.
Lewis, M. A., Lexa, D., Morss, L. R., and Richmann, M. K. Fri . "Cerium, uranium, and plutonium behavior in glass-bonded sodalite, a ceramic nuclear waste form.". United States. https://www.osti.gov/servlets/purl/11916.
@article{osti_11916,
title = {Cerium, uranium, and plutonium behavior in glass-bonded sodalite, a ceramic nuclear waste form.},
author = {Lewis, M. A. and Lexa, D. and Morss, L. R. and Richmann, M. K.},
abstractNote = {Glass-bonded sodalite is being developed as a ceramic waste form (CWF) to immobilize radioactive fission products, actinides, and salt residues from electrometallurgical treatment of spent nuclear reactor fuel. The CWF consists of about 75 mass % sodalite, 25 mass % glass, and small amounts of other phases. This paper presents some results and interpretation of physical measurements to characterize the CWF structure, and dissolution tests to measure the release of matrix components and radionuclides from the waste form. Tests have been carried out with specimens of the CWF that contain rare earths at concentrations similar to those expected in the waste form. Parallel tests have been carried out on specimens that have uranium or plutonium as well as the rare earths at concentrations similar to those expected in the waste forms; in these specimens UCl{sub 3} forms UO{sub 2} and PuCl{sub 3} forms PuO{sub 2}. The normalized releases of rare earths in dissolution tests were found to be much lower than those of matrix elements (B, Si, Al, Na). When there is no uranium in the CWF, the release of cerium is two to ten times lower than the release of the other rare earths. The low release of cerium may be due to its tetravalent state in uranium-free CWF. However, when there is uranium in the CWF, the release of cerium is similar to that of the other rare earths. This trivalent behavior of cerium is attributed to charge transfer or covalent interactions among cerium, uranium, and oxygen in (U,Ce)O{sub 2}.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}

Conference:
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