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Vapour Phase Hydration of Magnox Waste Glass

Published online by Cambridge University Press:  11 February 2011

Neil C. Hyatt ,
William E. Lee ,
Russell J. Hand ,
Michael I. Ojovan ,
Paul K. Abraitis  and
Charlie R. Scales
Neil C. Hyatt
Affiliation:
Immobilisation Science Laboratory, Department of Engineering Materials, The University of Sheffield, Mappin Street, Sheffield, S1 3JD., UK.
William E. Lee
Affiliation:
Immobilisation Science Laboratory, Department of Engineering Materials, The University of Sheffield, Mappin Street, Sheffield, S1 3JD., UK.
Russell J. Hand
Affiliation:
Immobilisation Science Laboratory, Department of Engineering Materials, The University of Sheffield, Mappin Street, Sheffield, S1 3JD., UK.
Michael I. Ojovan
Affiliation:
Immobilisation Science Laboratory, Department of Engineering Materials, The University of Sheffield, Mappin Street, Sheffield, S1 3JD., UK.
Paul K. Abraitis
Affiliation:
BNFL Plc., Sellafield, Seascale, Cumbria, CA20 1PG., UK.
Charlie R. Scales
Affiliation:
BNFL Plc., Sellafield, Seascale, Cumbria, CA20 1PG., UK.
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Abstract

Vapour phase hydration studies of simulant Magnox waste glass have been undertaken at 200°C, over periods of 5 – 25 days. Electron microscopy studies reveal a thin uniform hydration layer (∼10 μm thick) on 5, 10 and 25 day specimens. The formation of isolated surface alteration products occurs between 5 and 10 days at 200°C. The formation of extensive surface alteration products, in the form of a magnesium sodium aluminosilicate, is observed only in the case of the 25 day specimen. The significance of these observations in the context of the composition of Magnox waste glass, is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 757: Symposium II – Scientific Basis for Nuclear Waste Management XXVI , 2002 , II5.10
Copyright
Copyright © Materials Research Society 2003

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References

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