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    • 5. 发明申请
    • A NON-AQUEOUS METHOD FOR SEPARATING CHEMICAL CONSTITUENTS IN SPENT NUCLEAR REACTOR FUEL
    • 用于分离消耗核反应堆燃料中化学成分的非水性方法
    • WO2006113040A3
    • 2008-04-10
    • PCT/US2006010546
    • 2006-03-24
    • JANES CLARENCE W
    • JANES CLARENCE W
    • G21C19/48C01G43/025
    • C01G43/025C01G56/005G21C19/44G21C19/48Y02W30/882Y02W30/884
    • Herein is a method of segregating chemical species contained in spent nuclear reactor fuel without employing conventional acid dissolution. Particularly, pellets of spent fuel are ground to talc sized particles. Heat is added. The preferred heating is by flow through a plasma arc producing micron sized liquid drops suspended in helium flow. The vapor pressure of the chemical species is significantly greater than uranium dioxide, the ultra volatile chemical species evolve from the drops into the helium flow. The gas phase is separated from the mist by gas/liquid separator (demister). Heavy mist drops of UO2 impact the walls, coalesce and flow down to the separator drain, becoming legally transportable. Helium flow exhausts from the separator vertically. The gaseous chemical species will condense in sequentially cooler stages an separate from the helium down to the cryogenic temperatures of liquid radioactive xenon and krypton. Non-condensed helium is recycled.
    • 本文是在不使用常规酸溶解的情况下分离废核反应堆燃料中所含的化学物质的方法。 特别地,将乏燃料颗粒研磨成滑石粉末颗粒。 加热。 优选的加热是通过流过等离子体电弧,产生悬浮在氦气流中的微米级的液滴。 化学物质的蒸气压显着大于二氧化铀,超挥发性化学物质从液滴进入氦气流。 气相通过气/液分离器(除雾器)与雾分离。 UO2的重雾滴影响墙壁,聚结并向下流到分离器排水管,成为法律上可运输的。 氦气从分离器垂直排出。 气态化学物质将在相继较冷的阶段中冷凝,与氦气分离到液体放射性氙气和氪气的低温温度。 非冷凝氦被回收。
    • 6. 发明申请
    • A METHOD OF SEPARATING URANIUM
    • 一种分离尿素的方法
    • WO01045115A2
    • 2001-06-21
    • PCT/GB2000/004682
    • 2000-12-08
    • G21C19/48G21C19/42
    • G21C19/48Y02W30/884
    • The invention provides a method of separating uranium from another metal, the method comprising the steps of providing the uranium in a higher oxidation state than in UO2; dissolving the uranium and other metal in an organic solvent; and selectively extracting the uranium from the organic solvent using a supercritical fluid. The method is suitable for use in reprocessing spent nuclear fuel. The present invention provides a "dry" method of separating uranium from another metal, i.e. the method does not require use of nitric acid for dissolution of spent nuclear fuel or large quantities of solvent for solvent extraction as in conventional Purex reprocessing.
    • 本发明提供了从另一种金属中分离铀的方法,该方法包括提供比在UO 2中更高氧化态的铀的步骤; 将铀等金属溶解在有机溶剂中; 并使用超临界流体从有机溶剂中选择性提取铀。 该方法适用于废核燃料的后处理。 本发明提供了从另一种金属分离铀的“干式”方法,即该方法不需要使用硝酸来溶解废核燃料或大量溶剂用于溶剂萃取,如在常规Purex再处理中。