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An Experimental and Modelling Approach of the Near Field Release and Transport Processes

Published online by Cambridge University Press:  25 February 2011

F. Lanza  and
A. Saltelli
F. Lanza
Affiliation:
Commission of the European Communities, Joint Research Centre Ispra Establishment, Materials Science Division, 21020 Ispra (Va), Italy
A. Saltelli
Affiliation:
Commission of the European Communities, Joint Research Centre Ispra Establishment, Materials Science Division, 21020 Ispra (Va), Italy
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Abstract

A simple mathematical model has been set up assuming that the glass leaching is defined by the diffusion and adsorption of the SiO2 in the porous media. It is also assumed that at the contact with the glass, the SiO2 content in the leachant reaches the saturation limit. Experimental weight losses seem to be in good agreement with the calculated values. In order to pass from the leaching rate of the glass to the release of radioactivity, the different radionuclides are subdivided into three different classes following their leaching rate and saturation limit. These three classes are discussed separately. An experiment which allows to measure leaching rate and diffusion of the various elements has been set up. Preliminary results are presented and discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 26: Symposium D – Scientific Basis for Nuclear Waste Management VII , 1983 , 605
Copyright
Copyright © Materials Research Society 1984

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References

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