Corrosion of a Pu-doped zirconolite-rich ceramic [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1997.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 10 pages : digital, PDF file
Additional Creators:: Argonne National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

As part of a large Pu disposition program, a zirconolite-rich titanate ceramic is being developed at Lawrence Livermore National Laboratory (LLNL) as a possible immobilization material. This same material is being tested at Argonne National Laboratory (ANL). The goal of this study is to describe the corrosion behavior of this ceramic, particularly the release of Pu and Gd, using results from several static corrosion tests (MCC-1, PCT-A, and PCT-B). The release of relatively large amounts of Al, Ba, and Ca in short-term tests (3 day MCC-1 and 7 day PCT-A) indicates that these elements are released from grain boundaries or from highly soluble phases. Results from long-term (28, 98, and 182 day) PCT-B show that the releases of Al, Ba, and Ca decrease with time, the releases of U and Zr increase with time, and that the releases of Cs, Gd, Mo, and Pu remain fairly constant. Formation of alteration phases may lead to the decrease of Ba and Ca in leachate solutions. Due to the heterogeneous nature of the material, the formation of alteration phases, and the inherently low solubility of several elements, no element(s) could be recommended as good markers for the overall corrosion of this ceramic. Data show that, due to the complex nature of this material, the release of each element should be considered separately.

Report Numbers:

E 1.99:anl/cmt/cp--92098
E 1.99: conf-970568--4
conf-970568--4
anl/cmt/cp--92098

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Note:

Published through SciTech Connect.
06/01/1997.
"anl/cmt/cp--92098"
" conf-970568--4"
"DE97053065"
99. annual meeting of the American Ceramic Society, Cincinnati, OH (United States), 4-7 May 1997.
Bates, J.K.; Buck, E.C.; Wolf, S.F.; Ebbinghaus, B.B.; Bakel, A.J.; Chamberlain, D.B.

Funding Information:

W-31109-ENG-38

View MARC record | catkey: 14454217