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Thermal Conversion of Cs-exchanged IONSIV IE-911 into a Novel Caesium Ceramic Wasteform by Hot Isostatic Pressing

Published online by Cambridge University Press:  21 February 2013

Tzu-Yu Chen ,
Joseph A. Hriljac ,
Amy S. Gandy ,
Martin C. Stennett ,
Neil C. Hyatt  and
Ewan. R. Maddrell
Tzu-Yu Chen
Affiliation:
School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, U.K.,
Joseph A. Hriljac
Affiliation:
School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, U.K.,
Amy S. Gandy
Affiliation:
Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, U.K.,
Martin C. Stennett
Affiliation:
Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, U.K.,
Neil C. Hyatt
Affiliation:
Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, U.K.,
Ewan. R. Maddrell
Affiliation:
National Nuclear Laboratory, Sellafield, Seascale, Cumbria, CA20 1PG, U.K.
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Abstract

Hot Isostatic Pressing of Cs-exchanged IONSIV IE-911 samples is shown to produce a mixture of ceramic phases, the nature and mass fractions of these have been determined by Rietveld analysis of powder X-ray diffraction data. The main Cs phase that forms is Cs2TiNb6O18, after this reaches approximately 30% of the total crystalline content the remaining Cs is partitioned into Cs2ZrSi6O15. Durability tests using the PCT-B method for 7 days at 90 °C with deionised water lead to Cs leach rates of 0.032 and 0.038 g∙m−2∙day−1 for samples exchanged to 6 and 12 wt% Cs, respectively, indicating a durable wasteform is produced.

Keywords

ion-exchange materialhot isostatic pressing (HIP)ceramic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1518: Symposium LL – Scientific Basis for Nuclear Waste Management XXXVI , 2012 , pp. 67 - 72
Copyright
Copyright © Materials Research Society 2013 

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References

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