The Geological Research in France - The Dosssier 2005 Argile
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The Geological Research in France - The Dosssier 2005 Argile Frederic Plas, and Jacques Wendling DS/IT, Andra, Parc de la Croix Blanche, 1-7 rue Jean MONNET, CHATENAY-MALABRY, 92298, France ABSRACT At the end of fifteen years of research defined by the French act of December 30, 1991 on radwaste management, Andra gave a report, ìDossier Argile 2005î, which concluded with the feasibility of a reversible disposal in the argillaceous Callovo-Oxfordien formation studied by means of an underground research laboratory at the Meuse/Haute-Marne site. Starting from source data like the characteristics of the geological medium and the waste inventory, the process followed by Andra to achieve this conclusion is of a sequential type, and iterative between concept design, scientific knowledge, in particular that of the phenomenological evolution of the repository and its geological environment from operating period to long term, and safety assessment. The ìDossier Argile 2005î covers a broad radwaste inventory, ILLW, HLW and Spent Fuel, so that it makes it possible to cover the whole of the technological, scientific and safety topics. This article will give an overview of the geological disposal studies in France and draw the main conclusion of the Dossier 2005 Argile. It will be focused on the near field (engineering components and near field host rock), while considering, if necessary, its integration within the whole system. After a short description of the concepts (including waste inventory and the characteristics of the Meuse/Haute the Marne site) and the functions of the components of repository and geological medium, one will describe, successively, the broad outline of the phenomenological evolution of repository and the geological medium in near field, in particular, by releasing the time scales of processes and uncertainties of knowledge. On this basis, one will indicate the safety scenarios that were considered and the broad outline of performance and dose calculations. Lessons learn from the Dossier 2005 Argile will be discussed and perspectives and priories for future will be indicated. INTRODUCTION The December 30, 1991 French Waste Act entrusted Andra, the French national agency for radioactive waste management, with the task of assessing the feasibility of deep geological disposal. The emphasis placed on the demonstration of safety [1] was gradually combined with considerations of prudent repository management [2,3]. As a result, two guiding principles ñ Long term safety and Reversibility ñ are fundamental requirements in designing a repository concept. They are to protect the rights of future generations, by providing them with a viable solution, without restricting their control over the waste management process. The studies carried out within this framework are presented in the ìDossier 2005 Argileî [4,5,6,7]. This ìDossierî presents the feasibility assessment ñ with regard to the technical capacity to accommodate all waste, reversibility, and safety ñ of disposal in a clay formation studied at
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