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The objective of this research work was the selection of a borosilicate glass composition suitable for the solidification of the HLW stream coming from the treatment of all the high-level wastes stored in Italy (MTR, Candu and Elk River), and the characterisation of this glass with reference to geological disposal. This research work was part of the Ulisse project, whose goal was the development and the demonstration of an integrated treatment of all the HLW stored in Italy, after their mixing (resulting waste: MCE waste). The main aim was to carry out a pre-treatment of the wastes, in order to concentrate the HLW fraction and to simplify the vitrification process. Some glass compositions were prepared and preliminarily characterised. The glass "BAZ" was finally selected. A complete characterisation of this glass was carried out in order to evaluate its mechanical, physical and physico-chemical properties. The chemical durability was evaluated by the MCC-1 static leach test at 90 C, using three different leachants and two surface-area to leachant-volume ratios. The same characterisation programme was applied to the BAZ glass produced in the IVET plant during the plant vitrification demonstration programme. A comparison between the two glasses and a critical evaluation of their performances with respect to the durability of other nuclear waste glasses was performed.

Additional information

Authors: CANTALE C, ENEA, Casaccia Centro Ricerche Energia Frascati, Roma (IT);CASTELLI S, ENEA, Casaccia Centro Ricerche Energia Frascati, Roma (IT);DONATO A, ENEA, Casaccia Centro Ricerche Energia Frascati, Roma (IT);TRAVERSO D M, ENEA, Casaccia Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: EUR 13611 EN (1991) 86 pp., FS, ECU 8.75
Availability: (2)
ISBN: ISBN 92-826-2029-8
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