Comportement sous eau des déchets radioactifs bitumes : validation expérimentale du modèle de dégradation Colonbo

Abstract : The behavior of bituminized waste is studied in geological repository conditions, i.e. under wet conditions. A model, called COLONBO, aiming at simulating the leaching mechanisms, has been developed. This work has the purpose to validate experimentally some results predicted by the model. Firstly, the leaching kinetics, that means water uptake and salts releases, have been followed with time. Secondly, porous structure resulting from the leaching has been observed with an environmental scanning electron microscope and quantified using some classical images analysis methods. Thirdly, the mass transfer properties of leached bituminized waste have been measured in diffusion cells using radioactive tracers. These three experiment types validate the COLONBO model results and consolidate the phenomenology. Moreover some ways aiming at improving the model have been proposed.
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Theses
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http://docnum.univ-lorraine.fr/prive/INPL_T_2004_GWINNER_B.pdf
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https://hal.univ-lorraine.fr/tel-01750027
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Submitted on : Thursday, March 29, 2018 - 12:36:13 PM
Last modification on : Monday, April 16, 2018 - 10:41:08 AM

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Benoît Gwinner. Comportement sous eau des déchets radioactifs bitumes : validation expérimentale du modèle de dégradation Colonbo. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2004. Français. ⟨NNT : 2004INPL014N⟩. ⟨tel-01750027⟩

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