Francois, B.; Ledac, A.; Michel, J.; Guibert, M.
CEA, 75 - Paris (France)1984
CEA, 75 - Paris (France)1984
AbstractAbstract
[en] An uranium oxide UO2 powder is prepared and 2 to 12% in weight of gadolinium oxide Gd2O3 is added. Then fuel pellets are roughly fabricated, then sintered in a hydrogen atmosphere containing 0,2 to 5% of water vapor. This process has an application in the field of PWR reactors
[fr]
La presente invention se rapporte a la fabrication de pastilles de combustible nucleaire. On prepare une poudre d'oxyde d'uranium UO2 additionnee de 2 a 12% en poids d'oxyde de gadolium Gd2O3 a partir de laquelle on realise des ebauches de pastilles qui sont frittees dans une atmosphere d'hydrogene contenant 0,2 a 5% en volume de vapeur d'eau. Application aux reacteurs nucleaires a eau sous pressionOriginal Title
Procede de fabrication de pastilles de combustible nucleaire contenant un absorbant neutronique temporaire
Primary Subject
Secondary Subject
Source
25 May 1984; 19 Nov 1982; 15 p; FR PATENT DOCUMENT 2536571/A/; FR PATENT APPLICATION 8219394; Available from Institut National de la Propriete Industrielle, Paris (France); Application date: 19 Nov 1982
Record Type
Patent
Country of publication
ACTINIDE COMPOUNDS, CHALCOGENIDES, ENRICHED URANIUM REACTORS, FLUIDS, GADOLINIUM COMPOUNDS, GASES, MATERIALS, NEUTRON ABSORBERS, NUCLEAR POISONS, OXIDES, OXYGEN COMPOUNDS, POWER REACTORS, RARE EARTH COMPOUNDS, REACTOR MATERIALS, REACTORS, THERMAL REACTORS, URANIUM COMPOUNDS, URANIUM OXIDES, VAPORS, WATER COOLED REACTORS, WATER MODERATED REACTORS
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Clozet, C.; Dessus, J.; Devillard, J.; Guibert, M.; Morlot, G.
CEA Grenoble, 38 (France)1969
CEA Grenoble, 38 (France)1969
AbstractAbstract
[en] This report describes the pilot fabrication of uranium carbide rods to be mounted in bundles and assayed in two channels of the EL 4 reactor. The fabrication process includes: - elaboration of uranium carbide granules by carbothermic reduction of uranium dioxide; - electron bombardment melting and continuous casting of the granules; - machining of the raw ingots into rods of the required dimensions; finally, the rods will be piled-up to make the fuel elements. Both qualitative and quantitative results of this pilot production chain are presented and discussed. (authors)
[fr]
Ce rapport decrit une fabrication pilote de carbure d'uranium qui permettra la constitution de grappes de crayons combustibles, placees a titre experimental dans deux canaux du reacteur EL 4. Le procede de fabrication employe comprend: - l'elaboration de granules de carbure d'uranium par reduction carbothermique d'oxyde d'uranium; - la fusion et coulee continue de ces granules par bombardement electronique; - l'usinage des lingots permettant d'obtenir les empilements de barreaux constituant les crayons combustibles. Les resultats qualitatifs et quantitatifs de cette fabrication pilote sont exposes et discutes. (auteurs)Original Title
Fabrication pilote de 325 kg de carbure d'uranium
Primary Subject
Secondary Subject
Source
1969; [43 p.]
Record Type
Report
Report Number
Country of publication
ACTINIDE COMPOUNDS, CARBIDES, CARBON COMPOUNDS, CARBON DIOXIDE COOLED REACTORS, CHALCOGENIDES, CHEMICAL REACTIONS, ENRICHED URANIUM REACTORS, FABRICATION, FUEL ELEMENTS, FUNCTIONAL MODELS, GAS COOLED REACTORS, HEAVY WATER MODERATED REACTORS, HWGCR TYPE REACTORS, MATERIALS, MATERIALS WORKING, MELTING, OXIDES, OXYGEN COMPOUNDS, PHASE TRANSFORMATIONS, PHYSICAL PROPERTIES, POWER REACTORS, PRESSURE TUBE REACTORS, REACTOR COMPONENTS, REACTORS, THERMAL REACTORS, URANIUM COMPOUNDS, URANIUM OXIDES
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