Hot-pressing behaviour of Synroc containing sodium-bearing nuclear wastes
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Date
1991-08
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Journal ISSN
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Publisher
Trans Tech Publications
Abstract
The hot-pressing behaviour of SYNROC powders prepared from "alkoxide-route" precursors was studied
using isothermal and dilatometrical techniques. The effects of variations in the type (with and without Na)
and loading of the simulated high level radioactive waste (HLW) were examined. The calculated optimum
hot-pressing temperature drops by about 10 - 30°C for each 7 MPa increase in pressure and 10 % increase in the HLW loading. The presence of Na in the HLW lowers the calculated optimum hot-pressing
temperature at 21 MPa by 60 - 100°C, depending upon the waste loading. At higher waste loadings,
densification of Na-bearing SYNROC is inhibited by pore formation within the pellet. There is some
evidence that the densification mechanisms of Na-bearing and non-Na-bearing SYNROC are different.
Description
Physical copy held by ANSTO Library at DDC: 620.14/9.
Keywords
Hot pressing, Synroc process, Synthetic rocks, Isothermal processes, Dilatometry, High-level radioactive wastes, Temperature range, Redox process, Radioactive wastes, Irradiation
Citation
Stewart, M. W. A., & Buykx, W. J. (1990). Hot-pressing behaviour of Synroc containing sodium-bearing nuclear wastes. Paper presented to the International Ceramic Conference (AUSTCERAM 90: ceramics technology - sharing the knowledge), Perth, Western Australia, 26-31 August 1990. In Darragh, P. J & Stead, R. J (Eds.), Proceedings of the International Ceramic Conference, (AUSTCERAM 90: ceramics technology - sharing the knowledge), Perth, Western Australia, 26-31 August 1990, (Vol. 48-50, 711-716). Zurich, Switzerland: Trans Tech Publications.