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SPRAY DRYING-ASSISTED TREATMENT OF URANIUM DIOXIDE CAST POWDER PREPARED WITH THE AID OF UF6 DRY TRANSFORMATION PROCESS
SPRAY DRYING-ASSISTED TREATMENT OF URANIUM DIOXIDE CAST POWDER PREPARED WITH THE AID OF UF6 DRY TRANSFORMATION PROCESS
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机译:UF 6 Sub>干法转化工艺制备的喷雾干燥辅助处理二氧化铀粉体
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摘要
FIELD: nuclear power engineering. SUBSTANCE: invention aims obtaining uranium dioxide powder with physicochemical properties suitable for preparation of mixed uranium and plutonium oxide nuclear fuel used in light-water nuclear reactors. Method comprises dry-process preparation of aqueous suspension of UO2 powder from uranium hexafluoride. This suspension contains 50-80% UO2 and at least one additive selected from deflocculant (ammonium polymethacrylate), organic binders (polyvinyl alcohol or polyethylene glycol), H2O2, and U3O8 powder. Amount of additives is such that viscosity of suspension does not exceed 250 mPa.s. Suspension is pulverized in hot gas at 150 to 300 C to give UO2 powder with average particle size 20 to 100 mcm, pulverization being performed with the aid of ultrasonic spray nozzle, turbine, or pressurized nozzle. EFFECT: optimized uranium dioxide preparation conditions. 15 cl, 1 dwg, 5 ex
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机译:领域:核电工程。物质:本发明旨在获得具有理化性质的二氧化铀粉末,该二氧化铀粉末适用于制备轻水核反应堆中使用的混合铀和oxide氧化物核燃料。该方法包括用六氟化铀干法制备UO 2 Sub>粉末的水悬浮液。该悬浮液包含50-80%的UO 2 Sub>和至少一种选自抗絮凝剂(聚甲基丙烯酸铵),有机粘合剂(聚乙烯醇或聚乙二醇),H 2 Sub> O < Sub> 2 Sub>和U 3 Sub> O 8 Sub>粉末。添加剂的量应使悬浮液的粘度不超过250mPa.s。将悬浮液在150至300℃的热气中粉碎,得到平均粒径为20至100 mcm的UO 2 Sub>粉末,可借助超声喷嘴,涡轮机或加压喷嘴进行粉碎。效果:优化了二氧化铀的制备条件。 15 cl,1 dwg,5 ex
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