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Comparison of Surface Layers Formed on Synthetic Basaltic Glass, French R7T7 and HMI Borosilicate Nuclear Waste form Glasses - Materials Interface Interactions Tests, Waste Isolation Pilot Plant

Published online by Cambridge University Press:  21 February 2011

Michael J. Jercinovic ,
Stacy A. Kaser ,
Rodney C. Ewing  and
Werner Lutze
Michael J. Jercinovic
Affiliation:
Department of Geology, University of New Mexico, Albuquerque, NM 87131
Stacy A. Kaser
Affiliation:
Department of Geology, University of New Mexico, Albuquerque, NM 87131
Rodney C. Ewing
Affiliation:
Department of Geology, University of New Mexico, Albuquerque, NM 87131
Werner Lutze
Affiliation:
Hahn Meitner Institut, Berlin GmbH, Glienicker Straβe, 1000 Berlin 39, F.R., Germany
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Abstract

Materials Interface Interaction Test results for up to 2 years indicate that surface layers formed on synthetic basaltic glass in brine are predominantly Mg-chloride or oxychloride. Layers formed on HMI and R7T7 borosilicate glass are Mg-silicates. Layer thickness increases from 1 year to 2 years for basaltic glass and HMI borosilicate glass. Mg-silicate contains Ni and Zr in amounts that are generally related to the composition of associated glass, but layers formed on basaltic glass also contain Ni and Zr, elements not present in the glass. Ni and Zr are, in part externally derived, however, Ti appears to be completely immobile, and is not found in layers formed on Ti-free glass (R7T7). Some chemical components of the surface layers are derived, in part, from alteration of glass but major components of the layers are from the brine.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 176: Symposium U – Scientific Basis for Nuclear Waste Management XIII , 1989 , 355
Copyright
Copyright © Materials Research Society 1990

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References

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