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Waste Glass Corrosion Modeling: Comparison with Experimental Results

Published online by Cambridge University Press:  25 February 2011

William. L. Bourcier
William. L. Bourcier*
Affiliation:
Lawrence Livermore National Laboratory, L-219, Livermore, CA 94550 USA
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Abstract

Models for borosilicate glass dissolution must account for the processes of (1) kinetically-controlled network dissolution, (2) precipitation of secondary phases, (3) ion exchange, (4) rate-limiting diffusive transport of silica through a hydrous surface reaction layer, and (5) specific glass surface interactions with dissolved cations and anions. Current long-term corrosion models for borosilicate glass employ a rate equation consistent with transition state theory embodied in a geochemical reaction-path modeling program that calculates aqueous phase speciation and mineral precipitation/dissolution. These models are currently under development. Future experimental and modeling work to better quantify the rate-controlling processes and validate these models are necessary before the models can be used in repository performance assessment calculations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 333: Symposium V – Scientific Basis for Nuclear Waste Management XVII , 1993 , 069
Copyright
Copyright © Materials Research Society 1994

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References

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