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公开(公告)号：US4963758A
公开(公告)日：1990-10-16
申请号：US258520
申请日：1988-10-17
申请人： Robert C. Noren , Richard P. Vanek
发明人： Robert C. Noren , Richard P. Vanek
IPC分类号： G21C3/62
摘要： Methods for making nuclear fuel compacts containing precise amounts of nuclear fuel material which exhibit low heavy metal contamination and fewer defective coatings following compact fabrication using a hardenable binder including petroleum pitch or the like. Nuclear fuel particles having a multiple layer fission-product-retentive barrier, with a dense outer layer thereof being surrounded by a protective overcoating, e.g., pyrocarbon having a density between about 1 and 1.2 g/cm.sup.3, that is encapsulated within a thin shell of pyrocarbon from about 1.7 to about 2 g/cm.sup.3 in density, can be precisely metered to create charges containing very precise amounts of nuclear fuel material that can be pre-compacted in molds under relatively high pressures and then combined with the fluid binder which is ultimately carbonized to produce carbonaceous compacts containing very precise nuclear fuel loadings.
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公开(公告)号：US4098224A
公开(公告)日：1978-07-04
申请号：US749876
申请日：1976-12-13
CPC分类号： G21C3/626 , Y02E30/38 , Y10S118/05
摘要： Three embodiments of apparatus for gas coating particles suspended in a fluidized bed within a coating chamber are illustrated, each having a base plate with a center opening, an extension nozzle assembly arranged in the opening and mounted on a movable two-piece internally cooled gas probe for supplying reactant gas to the nozzle and an annular unloading passage surrounding the probe and in communication with a side unloading chute. In the three embodiments, different means are provided for raising and lowering the nozzle assembly to permit unloading of coated particles and provide access to the nozzle assembly.
摘要翻译： 示出了用于气体涂覆悬浮在涂覆室内的流化床中的颗粒的装置的三个实施例，每个具有中心开口的基板，布置在开口中的延伸喷嘴组件，并安装在可移动的两件式内部冷却气体探针 用于向喷嘴供应反应气体，以及围绕探头并与侧面卸载斜槽连通的环形卸载通道。 在三个实施例中，提供了用于升高和降低喷嘴组件以允许卸载涂覆的颗粒并提供对喷嘴组件的通路的不同装置。
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公开(公告)号：US4194079A
公开(公告)日：1980-03-18
申请号：US885909
申请日：1978-03-13
摘要： In a high temperature furnace adapted for fuel particle coating applications, an electrode ring forms a portion of the furnace wall, heating elements within the furnace being urged into conductive engagement with an internal surface of the electrode ring by means of adjustable spring mechanisms arranged outside the furnace and interconnected with the heating elements by elongated bolts in order to permit adjustment of the spring load without interrupting operation of the furnace. The spring mechanism provides nearly constant contact pressure between the heating elements and the electrode ring surface under varying thermal and physical conditions and prevents overheating and failure of the electrode ring.
摘要翻译： 在适用于燃料颗粒涂覆应用的高温炉中，电极环形成炉壁的一部分，炉内的加热元件通过布置在炉壁外部的可调节弹簧机构被推动成与电极环的内表面导电接合 并且通过细长的螺栓与加热元件相互连接，以便允许调节弹簧载荷而不中断炉的操作。 弹簧机构在不同的热和物理条件下在加热元件和电极环表面之间提供几乎恒定的接触压力，并且防止电极环的过热和故障。
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