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Development of Sphene-Based Glass Ceramics Tailored for Canadian Waste Disposal Conditions

Published online by Cambridge University Press:  15 February 2011

Peter J. Hayward  and
E.V. Cecchetto
Peter J. Hayward
Affiliation:
Atomic Energy of Canada Limited, Whiteshell Nuclear Research Establishment, Pinawa, Manitoba, Canada, ROE 1LO
E.V. Cecchetto
Affiliation:
Atomic Energy of Canada Limited, Whiteshell Nuclear Research Establishment, Pinawa, Manitoba, Canada, ROE 1LO
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Abstract

Glass ceramics and ceramics based on minerals of proven thermodynamic stability in Canadian Shield groundwaters are being developed to host the wastes arising from future CANDU* fuel recycling. Sphene-based glass ceramics, produced by melti0n g Na2 O-CaO-Al2O3-TiO2-SiO2 compositions at 1400° C, cooling, ang then reheating the phaseseparated glasses to approximately 1000° C, show strong partitioning of waste ions into the sphene (CaTiSiO5 ) lattice. Leaching results suggest that these materials are durable in deionized water. In simulated groundwaters, the sphene phase appears to suffer no net leaching. Leach testing and manufacturing methods are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 6: Symposium D – Scientific Basis for Nuclear Waste Management IV , 1981 , 91
Copyright
Copyright © Materials Research Society 1982

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References

REFERENCES

1. Boulton, J., editor, Second Annual Report of the Canadian Nuclear Fuel Waste Management Program; Atomic Energy of Canada Limited Report, AECL–6804, 1980 December.Google Scholar
2. Cameron, D.J. and Strathdee, G.G., Material Aspects of Nuclear Waste Disposal in Canada, in Ceramics in Nuclear Waste Management, USDOE CONF–790420, 1979, p. 4.Google Scholar
3. Frape, S.K., Fritz, P. and Pearson, R., Deep Saline Groundwaters within the Canadian Shield, Canadian Nuclear Society, 2nd Annual Conference June 10, 1981, Ottawa, Proceedings in press.Google Scholar
4. Nesbitt, H.W., Bancroft, G.M., Karkhanis, S.N. and Fyfe, W.S., The Stability of Titanium Minerals in the Presence of Backfill and Repository Materials: A General Approach, Materials Research Society Symposium, Nuclear Section, November 16–21, 1980, Boston, Mass. Proceedings in press.Google Scholar
5. Deer, W.A., Howie, R.A. and Zussman, J., Rock Forming Minerals, Vol. 1, Longman Ltd., 1962.Google Scholar
6. Robie, R.A., Hemingway, B.S. and Fisher, J.R., Thermodynamic Properties of Minerals and Related Substances at 298.15 K and 1 Bar Pressure, and at Higher Temperatures, U.S. Geol. Survey Bull. 1452, 1978.Google Scholar
7. Barner, H.E. and Scheuerman, R.V., Handbook of Thermochemical Data for Compounds and Aqueous Species, John Wiley and Sons, New York, 1977.Google Scholar
8. Crerar, D.A. and Anderson, G.M., Solubility and Solvation Reactions of Quartz in Dilute Hydrothermal Solutions, Chemical Geology, 8, 107, 1971.Google Scholar
9. DeVries, R.C., Roy, R. and Osborn, E.F., Phase Equilibria in the System CaO-TiO2-SiO2 , J. Amer. Ceram. Soc., 38, 158, 1955.Google Scholar
10. Harvey, K.B., The Development of Aluminosilicate and Borosilicate Glasses as Matrices for CANDU High Level Wastes, Presentation at American Ceramic Society, Fall Meeting, San Francisco, October 26–29, 1980.Google Scholar
11. Tait, J.C., Computer Program for the Calculation of Leach Rates, Atomic Energy of Canada Limited Report, TR–101, (1980), unpublished work, available from Atomic Energy of Canada Research Company, Chalk River, Ontario, KOJ 1JO.Google Scholar
12. Bancroft, G.M., Metson, J., Nesbitt, H.W., Fyfe, W.S., Hayward, P.J. and Cecchetto, E.V., Factors Affecting the Leach Rates of Perovskite and Sphene, to be submitted for presentation at the Fifth International Synposium on the Scientific Basis for Radioactive Waste Management, June 7–10, 1982, West; Berlin.Google Scholar