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Long-Term Release from High Level Waste Glass - Part IV: The Effect of Leaching Mechanism

Published online by Cambridge University Press:  26 February 2011

Eberhard Freude ,
Bernd Grambow ,
Werner Lutze ,
Harald Rabe  and
Rodney C. Ewing
Eberhard Freude
Affiliation:
Hahn-Meitner-Institut für Kernforschung Berlin GmbH, Glienicker Straβe 100, 1000 Berlin 39, Federal Republic of Germany
Bernd Grambow
Affiliation:
Hahn-Meitner-Institut für Kernforschung Berlin GmbH, Glienicker Straβe 100, 1000 Berlin 39, Federal Republic of Germany
Werner Lutze
Affiliation:
Hahn-Meitner-Institut für Kernforschung Berlin GmbH, Glienicker Straβe 100, 1000 Berlin 39, Federal Republic of Germany
Harald Rabe
Affiliation:
Hahn-Meitner-Institut für Kernforschung Berlin GmbH, Glienicker Straβe 100, 1000 Berlin 39, Federal Republic of Germany
Rodney C. Ewing
Affiliation:
Department of Geology, University of New Mexico, Albuquerque, NM 87131, USA
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Extract

During the past ten years extensive data have been determined for the corrosion of nuclear waste forms in short-term laboratory experiments (usually less than one year). The long-term behavior of glass has been inferred by: (1) the acceleration of corrosion rates at high temperatures [1]; (2) the use of high surface areas of the glass to small volumes of solution [1]; and the analysis of natural glasses altered over long periods of geologic time [2, 3]. The most recent efforts have concentrated on understanding the mechanisms of corrosion [1, 4, 5]. The corrosion mechanism may be used to make long-term extrapolations of the “stability” of the waste form. In this paper, we consider a linear time dependence for the corrosion under near saturation conditions and use a rate equation in the QTERM code [6, 7, 8] to model the long-term behavior of the German glass, C-31−3EC [9], JSS A [10, 11] and SRL TDS 131 [1]. The data base for C-31−3EC has been published elsewhere [9, 12, 13, 14], and we include experimental work completed by Rabe for boron and silica, at 200°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 44: Symposium N – Scientific Basis for Nuclear Waste Management VIII , 1984 , 99
Copyright
Copyright © Materials Research Society 1985

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References

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