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Durability studies of simulated UK high level waste glass

Published online by Cambridge University Press:  04 July 2014

Nor E. Ahmad ,
Julian R. Jones  and
William E. Lee
Nor E. Ahmad
Affiliation:
Centre for Nuclear Engineering, Department of Materials, Imperial College London, South Kensington Campus, London SW7 2AZ, UK. Physics Department, Faculty of Science, Universiti Teknologi Malaysia, UTM Skudai, 81300 Johor, Malaysia.
Julian R. Jones
Affiliation:
Department of Materials, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
William E. Lee
Affiliation:
Centre for Nuclear Engineering, Department of Materials, Imperial College London, South Kensington Campus, London SW7 2AZ, UK. Department of Materials, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
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Abstract

A simulated Magnox glass which is Mg- and Al- rich was subjected to aqueous corrosion in static mode with deionised water at 90 °C for 7-28 days and assessed using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) with Energy X-Ray Dispersive Spectroscopy (EDS) and Inductively Coupled Plasma – Optical Emission Spectroscopy (ICP-OES). XRD revealed both amorphous phase and crystals in the glass structure. The crystals were Ni and Cr rich spinels and ruthenium oxide. After two weeks of incubation in deionised water, the glass surface was covered by a ∼11 μm thick Si-rich layer whilst mobile elements and transition metals like Na, B, and Fe were strongly depleted. The likely corrosion mechanism and in particular the role of Mg and Al in the glass structure are discussed.

Keywords

corrosionX-ray diffractionwaste management
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1665: Symposium NW – Scientific Basis for Nuclear Waste Management XXXVII , 2014 , pp. 291 - 296
Copyright
Copyright © Materials Research Society 2014 

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References

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