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Influence of a Backfilling Material on Borosilicate Glass Leaching

  • F. Lanza (a1) and C. Ronsecco (a1)

Extract

When a canister containing a borosilicate glass incorporating highly radioactive waste is put into an underground repository, care must be taken in favouring the dispersion of the generated decay heat by conduction in the surrounding rock. For this purpose the space existing between the glass container and the repository walls is filled with a material having an acceptable thermal conductivity. If the backfilling material is highly compacted, it can form a zone of very low permeability reducing in this way the flow of water around the canister.

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1. Push, R., (1979), Proc. of the Workshop on the Use of Argillaceous Materials for the Isolation of Radioactive Waste. NEA, Paris, September, 1979.
2. Grim, R.E., (1962) Applied Clay Mineralogy, McGraw Hill Co.10.1080/11035896209447314
3. Push, R. and Bergström, A., (1981) Scientific Basis for Nuclear Waste Management, Vol. 3, Moore, J.G., ed., Plenum Press.
4. Marples, J.A.C., Lutze, W. and Sombret, C., (1980) in Radioactive Waste Management and Disposal, Proc. of the First European Community Conference, pp. 305323, Harwood Academic Publ., Brussels.
5. Van Iseghem, P., Timmermans, W. and De Batist, R., (1981) International Seminar on Chemistry and Process Engineering for HLW Solidification, Jülich, June 1981.
6. Lanza, F. and Parnisari, E., (1981) Nucl. and Chem. Waste Man., Vol. 2, 131.

Influence of a Backfilling Material on Borosilicate Glass Leaching

  • F. Lanza (a1) and C. Ronsecco (a1)

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