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Abstract

Deep salt formations are being considered in several countries as possible host environments for radioactive waste from nuclear power plants. Peculiar to a salt formation are the high thermal conductivity, the very low water content, the self-sealing characteristics and the impermeability properties. A groundwater flow through the repository can therefore occur only as a consequence of some disruptive event. In such a case, the high salt concentration of brine is expected to increase the radionuclide mobility in the geosphere through complexation with chloride ions and mass action of alkali and alkaline earth metal cations with exchange sites of the geologic material. The work described in this paper is concerned with the assessment of the potential migration of actinides in porous strata above rock salt repositories. An integrated experimental approach was followed; leach tests, column migration experiments, speciation studies and batch K-d measurements were used to simulate the mobilization of americium from a vitrified waste and its transport through backfill material and overlaying strata. The final aim of this study is to characterize the mechanisms by which the radioactivity is dispersed into the geosphere and model its return to the surface.

Additional information

Authors: BIDOGLIO G, JRC ISPRA ESTAB. (ITALY);AVOGADRO A, JRC ISPRA ESTAB. (ITALY);DE PLANO A, JRC ISPRA ESTAB. (ITALY);LAZZARI G P JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: RADIOACTIVE WASTE MANAGEMENT AND THE NUCLEAR FUEL CYCLE, VOL. 5 (1984), NO. 4, PP. 311-326, HARWOOD ACD. PUBL.
Record Number: 1989123054200 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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