METHOD FOR PRODUCING URANIUM AND GADOLINIUM CONTAINING FUEL PELLETS

FIELD: nuclear power engineering; production of uranium and gadolinium containing fuel pellets. ^ SUBSTANCE: non-crushed UO2, Cd2O3(U, Cd)3O8 are mixed up. Gadolinium oxide in the amount of 2-9 mass percent by gadolinium content is introduced. Mixing is effected in single step within mixer of any ty...

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Hauptverfasser:	JASHIN SERGEJ ALEKSEEVICH, KUCHKOVSKIJ ANATOLIJ ANDREEVICH, ZABELIN JU.V, KHADEEV VITALIJ GRIGOR'EVICH, PROSELKOV V.N, MILOVANOV O.V, BIRJUKOVA ALLA GENNAD'EVNA, SHMEL'KIN LEV MOISEEVICH, KULESHOV A.V, SHEVCHENKO GALINA MIKHAJLOVNA, BIBILASHVILI JU.K, KUZNETSOV BORIS ALEKSANDROVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS INORGANIC CHEMISTRY METALLURGY NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR REACTORS PHYSICS
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Beschreibung
Zusammenfassung:	FIELD: nuclear power engineering; production of uranium and gadolinium containing fuel pellets. ^ SUBSTANCE: non-crushed UO2, Cd2O3(U, Cd)3O8 are mixed up. Gadolinium oxide in the amount of 2-9 mass percent by gadolinium content is introduced. Mixing is effected in single step within mixer of any type for 60 - 80 min. Then mixture is homogenized in vortex-bed apparatus for 2 - 10 min in batches of 2 kg by sum of oxides at following mass proportion of magnetic body, such as needle: material being treated, 1-1.25 : 10. Powdered charges are obtained by averaging several batches of homogenized mixtures. Charges are conveyed for producing molding powder. For recovering wastes of uranium and gadolinium containing fuel pellets, wastes of molded and sintered pellets are oxidized to gadolinium containing uranium oxide monoxide (U, Cd)3O8 at temperature of 600200C for 2 h in air atmosphere. ^ EFFECT: enhanced degree of solid solution formation; reduced amount of stored wastes. ^ 5 cl 1 ex