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Alternative Synroc Formulations

Published online by Cambridge University Press:  25 February 2011

E.R. Vance ,
K.L. Smith ,
G.J. Thorogood ,
B.D. Begg ,
S.S. Moricca ,
P.J. Angel ,
M.W.A. Stewart ,
M.G. Blackford  and
C.J. Ball
E.R. Vance
Affiliation:
Advanced Materials Program, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai. N.S.W., 2234, Australia
K.L. Smith
Affiliation:
Advanced Materials Program, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai. N.S.W., 2234, Australia
G.J. Thorogood
Affiliation:
Advanced Materials Program, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai. N.S.W., 2234, Australia
B.D. Begg
Affiliation:
Advanced Materials Program, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai. N.S.W., 2234, Australia
S.S. Moricca
Affiliation:
Advanced Materials Program, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai. N.S.W., 2234, Australia
P.J. Angel
Affiliation:
Advanced Materials Program, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai. N.S.W., 2234, Australia
M.W.A. Stewart
Affiliation:
Advanced Materials Program, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai. N.S.W., 2234, Australia
M.G. Blackford
Affiliation:
Advanced Materials Program, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai. N.S.W., 2234, Australia
C.J. Ball
Affiliation:
Advanced Materials Program, Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai. N.S.W., 2234, Australia
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Abstract

Perovskite is the least durable of the resistate minerals comprising Synroc-C and it is desirable to reduce its abundance in Synroc. Kinetic limitations and competition with Csapparently affect the incorporation of Sr into hollandite during hot-pressing at 1200ºC/20 MPa so that ∼ 10% of perovskite (a value below the percolation limit) is probably an optimum target. Zirconolite-rich Synroc formulations have been prepared for actinide-rich wastes. Background XRD and TEM studies have also been performed to study the crystal-chemical behaviour of Nd (a simulant of trivalent actinides) in zirconolite. Either rare-earth compensated perovskite or freudenbergite in Synroc can evidently be used to immobilise Na-bearing HLW.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 235
Copyright
Copyright © Materials Research Society 1992

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References

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