Clays in natural & engineered barriers for radioactive waste confinement - 3rd international meeting Lille, September 17 - 20, 2007

Lille 2007

Scope and Objectives

Following the success of the two earlier meetings on "Clays in natural and engineered barriers for radioactive waste confinement", respectively held in Reims (December 2002) and Tours (March 2005), as well as the growing interest of the international scientific community regarding this subject, the Scientific Committee of the meeting - in agreement with the overall opinion of the participants - recommended the organisation of a third meeting on the same general topic.

The purpose of this third international meeting is once again to bring together specialists in the different disciplines related to clays and clay minerals, and scientists from organisations involved in disposal of radioactive waste, in order to evaluate the progress of research conducted in that field.

Multidisciplinary approaches including geology, mineralogy, geochemistry, rheology, physics and chemistry of clay minerals and assemblages are required in order to provide a detailed characterisation of the geological host formations considered for the disposal of radioactive waste and to assess the behaviour of engineered and natural barriers when submitted to various types of perturbations induced by such facilities. The evaluation of the performance of the natural barrier, as well as of the impact of repository-induced disturbances upon the confinement properties of clay-rich geological formations constitutes the major objectives of the experimental programs being, or to be, conducted in underground laboratories for interpreting the subsequent scientific results, for modelling the long-term behaviour of radioactive waste repositories and for carrying out safety assessment exercises.

The meeting covers all the aspects of clay characterisation and behaviour considered at the various time and space scales relevant to confinement of radionuclides in clay; from basic phenomenological processes description to the global understanding of the performance and safety at repository and geological scales.

In this context, the meeting will also offer a particular opportunity to present the more recent developments and main outputs of research carried out within the framework of dedicated European projects (especially "NF PRO", on key processes in the nearfield; "FUNMIG", on radionuclides migration processes in the far field,...)

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Clays in natural and engineered barriers for radioactive waste confinement - Lille 2007 - 3rd International Meeting - Andra