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Accueil > Groupes de recherche > Matériaux et Irradiation > Experimental simulation of the High burnup Structure in Urania > Experimental simulation of the High burnup...

Experimental simulation of the High burnup...

Experimental simulation of the High burnup Structure in Urania

Binary metal oxides possessing the fluorite-type structure are well known to be radiation tolerant materials. As an illustrative example uranium dioxide does not become amorphous under irradiation but exhibits instead a defective structure, whose specific microstructure depends on several parameters, such as the burnup, local temperature of the fuel, irradiation conditions, presence of incorporated impurities (e.g. fission products, transuranium elements). Although the basic mechanisms of defects production in irradiated solids are well established, considerable experimental and computational efforts are undertaken to better understand the exact role played by the various relevant parameters in the formation of a specific microstructure and on the final destabilisation of the solid.