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Abstract

For the modelling of the migration of radionuclides in the Boom clay formation, the analytical code MICOF has been updated with a 3-dimensional analytical solution for discrete sources. The MICOF program is used for the calculation of the release of alpha and beta emitters from the HLW. The program is adapted for the calculation of the local exposure dose and the dose rate to which the Boom clay may be exposed due to the release of the alpha and beta emitters. A coherent conceptual model is developed which describes all the major physico-chemical phenomena influencing the migration of radionuclides in the Boom clay. The concept of the diffusion accessible porosity is introduced and included in the MICOF code. Different types of migration experiments are described with their advantages and disadvantages. The thermal impact of the HLW disposal in the stratified Boom clay formation has been evaluated by a finite element simulation of the coupled heat and mass transport equation. The results of the simulations show that under certain conditions thermal convection cells may form, but the convective heat transfer in the clay formation is negligible.

Additional information

Authors: PUT M, SCK/CEN, Mol (BE);HENRION P, SCK/CEN, Mol (BE)
Bibliographic Reference: EUR 14156 EN-FR (1992) 261 pp., FS, ECU 25.50
Availability: (2)
ISBN: ISBN 92-826-4062-0
Record Number: 199210661 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en,fr
Available languages: en,fr