CONDITIONNEMENT DE DECHETS RADIOACTIFS EN COLIS DE GRANDE DIMENSION DURABLES ET CONFINANTS

L'invention concerne le conditionnement durable de déchets radioactifs, en particulier de déchets graphite, comporte les étapes : a) installer le déchet sensiblement au centre d'un conteneur (1) de béton durable et confinant, b) couler un mortier d'immobilisation des déchets (4) durcissant dans le conteneur, et c) couler un bouchon de béton durable et confinant, durcissant, après l'étape b). Avantageusement, le mortier durcissant et/ou le béton durcissant sont auto-plaçants. The process of treating radioactive waste dosage, comprises installing the waste at the center of a container (1) made of a material confining radionuclides, and casting a self-compacting material confining radionuclides and then hardening in the container. The cast material comprises a cap for the container, and is a self-compacting material for immobilizing the waste. The container is made of a material same as the cap. The materials of the container and the cap are self-compacting containment reinforced concrete. The process of treating radioactive waste dosage, comprises installing the waste at the center of a container (1) made of a material confining radionuclides, and casting a self-compacting material confining radionuclides and then hardening in the container. The cast material comprises a cap for the container, and is a self-compacting material for immobilizing the waste. The container is made of a material same as the cap. The materials of the container and the cap are self-compacting containment reinforced concrete. The casting step further comprises casting the material for self-compacting immobilization of the waste in the container, placing a reinforcement framework above the immobilization material in the container, and casting the concrete in the reinforcement framework. The process further comprises providing an anti-flotation device of the waste in the container, installing the waste in the container, installing the anti-floating device in the container at a height chosen to allow a rise by flotation of limited waste in the container during the casting operation of the immobilization material of the waste in the container, casting the self-compacting immobilization material of the waste in the container, applying a first casting of the self-compacting immobilization material for partly submerging the waste, and applying a second casting immobilization material to submerge the waste after taking the first casting of the immobilization material. The self-compacting imm