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Vapour Phase Hydration of Blended Oxide - Magnox Waste Glasses

Published online by Cambridge University Press:  01 February 2011

Neil C. Hyatt ,
William E. Lee ,
Russell J. Hand ,
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.
Paul K. Abraitis
Affiliation:
BNFL Technology Centre, Sellafield, Seascale, Cumbria, CA20 1PG., UK.
Charlie R. Scales
Affiliation:
BNFL Technology Centre, Sellafield, Seascale, Cumbria, CA20 1PG., UK.
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Abstract

Vapour phase hydration studies of a blended Oxide / Magnox simulant high level waste glass were undertaken at 200°C, over a period of 5 – 25 days. The alteration of this simulant waste glass is characterised by a short incubation time of less than 5 days, leading to the formation of an alteration layer several microns thick. Following the incubation period, the alteration proceeds at a constant rate of 0.15(1)μmd−1. The distribution of key glass matrix (Si, Na) and waste (Cs, Zr, Nd, Mo) elements was found to vary significantly across the alteration layer. Vapour phase hydration leads to formation of surface alteration products, identified as smectite, zirconium silicate and alkaline-earth molybdate phases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 807: Symposium Scientific Basis for Nuclear Waste Management XXVII , 2003 , 181
Copyright
Copyright © Materials Research Society 2004

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References

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