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Synroc-D Type Ceramics Produced by Hot Isostatic Pressing and Cold Crucible Melting for Immobilisation of (Al, U) Rich Nuclear Waste

Published online by Cambridge University Press:  19 October 2011

Eric R. Vance ,
Michael La Robina ,
Huijun Li  and
Joel Davis
Eric R. Vance
Affiliation:
erv@ansto.gov.au, Australian Nuclear Science and Technology Organisation, Institute of Materials and Engineering Science, New Illawarra road, Menai, NSW 2234, Australia, 61-2-9717-3019
Michael La Robina
Affiliation:
mlr@ansto.gov.au, Australian Nuclear Science and Technology Organisation, Institute of Materials and Engineering Science, Menai, NSW 2234, Australia
Huijun Li
Affiliation:
hlx@ansto.gov.au, Australian Nuclear Science and Technology Organisation, Institute of Materials and Engineering Science, Menai, NSW 2234, Australia
Joel Davis
Affiliation:
jda@ansto.gov.au, Australian Nuclear Science and Technology Organisation, Institute of Materials and Engineering Science, Menai, NSW 2234, Australia
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Abstract

A synroc-D ceramic consisting mostly of spinel, hollandite, pyrochlore-structured CaUTi2O7, UO2, and Ti-rich regions shows promise for immobilisation of a HLW containing mainly Al and U, together with fission products. Ceramics with virtually zero porosities and waste loadings of 50-60 wt% on an oxide basis were prepared by cold crucible melting (CCM) at ∼1500°C, and also by subsolidus hot isostatic pressing (HIP) at 1100°C to prevent volatile losses. PCT leaching test values for Cs were < 13 g/L, with all other normalised elemental extractions being well below 1 g/L.

Keywords

ceramicwaste managementscanning electron microscopy (SEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 985: Symposium NN – Scientific Basis for Nuclear Waste Management XXX , 2006 , 0985-NN04-11
Copyright
Copyright © Materials Research Society 2007

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References

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