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The Effect of Increased Waste Loading on the Durability of High Level Waste Glass

Published online by Cambridge University Press:  01 February 2011

Chris Brookes ,
Mike Harrison ,
Andrew Riley  and
Carl James Steele
Chris Brookes
Affiliation:
christopher.m.brookes@sellafieldsites.com, Sellafield Ltd., High Level Waste Plants, Seascale, United Kingdom
Mike Harrison
Affiliation:
mike.t.harrison@nnl.co.uk, National Nuclear Laboratory, Seascale, United Kingdom
Andrew Riley
Affiliation:
andrew.d.riley@sellafieldsites.com, Sellafield Ltd., High Level Waste Plants, Seascale, United Kingdom
Carl James Steele
Affiliation:
carl.j.steele@sellafieldsites.com, Sellafield Ltd., High Level Waste Plants, Seascale, United Kingdom
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Abstract

This paper describes the results from static leach tests using the ASTM International standard Materials Characterisation Centre (MCC-1) and Product Consistency Test (PCT) protocols for inactive High Level Waste (HLW) glasses fabricated at full scale on the Sellafield Vitrification Test Rig. The samples comprised monoliths and powders of a 75:25 Oxide:Magnox Blend glass with 31 wt% waste incorporation and a Magnox-only glass with 35 wt% waste incorporation. The tests were carried out in de-ionized water at 90 °C for durations up to 42 days and normalized mass losses calculated.

The results of MCC-1 and PCT tests on both 31 wt% Blend and 35 wt% Magnox glasses, showing measurable differences to the corresponding standard 25 wt% waste incorporation glasses, are presented. A series of Scanning Electron Microscopy (SEM) investigations were also undertaken. The variation in composition and thickness of the alteration layer with sample type and duration is reported.

Keywords

nuclear materialswaste managementchemical composition
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1265: Symposium AA – Scientific Basis for Nuclear Waste Management XXXIV , 2010 , 1265-AA03-05
Copyright
Copyright © Materials Research Society 2010

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References

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