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Performance Assessment of Glass As A Long-Term Barrier To The Release of Radionuclides Into The Environment

Published online by Cambridge University Press:  28 February 2011

B. Grambow ,
W. Lutze  and
R. C. Ewing
B. Grambow
Affiliation:
Hahn-Meitner-Institut GmbH, Berlin, FRG
W. Lutze
Affiliation:
Hahn-Meitner-Institut GmbH, Berlin, FRG
R. C. Ewing
Affiliation:
University of New Mexico, USA; L.O. Werme, SKB, Stockholm, Sweden
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Abstract

Performance assessment of high-level nuclear waste forms in a repository must cover periods of time on the order of hundreds of thousands of years. There has rarely been a need to extrapolate the properties of a material over such long periods of time (except in the geologic sciences, e.g., the evaluation of long-term weathering effects based on results from laboratory experiments) and there has never been a more important need to make accurate and -verifiable “predictions” of the long-term materials performance. The results of such extrapolations could affect decisions concerning the selection of a repository and the number and types of barriers that are required to insure isolation over long periods of time. In typical safety analyses [1,2] waste form corrosion is described by a single constant rate, and no effort is made to evluate whther the modal of the “source term” can be substantiated or verified by comparison similar or analogous processes [3].

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 112: Symposium P – Scientific Basis for Nuclear Waste Management XI , 1987 , 531
Copyright
Copyright © Materials Research Society 1988

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