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    Fuel element for nuclear reactor
    3.
    发明公开
    Fuel element for nuclear reactor 失效
    BernnstoffelementfürKernreaktor。

    公开(公告)号：EP0098696A1

    公开(公告)日：1984-01-18

    申请号：EP83303397.0

    申请日：1983-06-13

    申请人： EXXON NUCLEAR COMPANY INC.

    发明人： Kilian, Douglas Carrol

    IPC分类号： G21C3/26 ,  G21C3/16

    CPC分类号： G21C3/26 ,  G21C3/16 ,  G21Y2002/201 ,  G21Y2002/303 ,  G21Y2004/10 ,  G21Y2004/30 ,  Y02E30/40

    摘要： A cylindrical fuel element having a sheath (11) contains a central core (12) of particulate depleted urania or other particulate fuel(s) of low enrichment. The central core is surrounded by an outer annular volume (13) of one or more particulate highly enriched fuels, thus providing a radial enrichment gradient ecross the fuel cross-section. The higher enriched particulate fuel is concentrated close to the sheath (11) and more nuclear events will take place near the sheath surface. The thermal efficacy of the fuel element is increased due to the shortened thermal conductance pathways through the poorly conductive urania. The fuel element's operating fue! centerline temperature at a given power output is significantly reduced. Preferably the particulate fuels are mixtures of three types of substantially spherical particles of different diameter sizes.

    摘要翻译： 具有护套（11）的圆柱形燃料元件包含颗粒状贫化的尿素或其他富集浓度较低的颗粒燃料的中心核心（12）。 中心芯由一个或多个高度富集的高效燃料的外部环形容积（13）包围，从而提供了跨越燃料横截面的径向富集梯度。 较高浓缩的颗粒燃料集中在护套（11）附近，并且在护套表面附近将发生更多的核事件。 燃料元件的热效能由于导电性较差的尿素传导通路的缩短而增加。 燃油元件在给定功率输出下的燃油中心线工作温度显着降低。 优选地，颗粒燃料是不同直径尺寸的三种类型的基本上为球形的颗粒的混合物。

    NUCLEAR THERMAL PROPULSION FUEL ELEMENT PACKING DEVICE
    5.
    发明公开
    NUCLEAR THERMAL PROPULSION FUEL ELEMENT PACKING DEVICE 审中-公开

    公开(公告)号：EP4235692A1

    公开(公告)日：2023-08-30

    申请号：EP23179228.4

    申请日：2019-10-08

    申请人： BWXT Nuclear Energy, Inc.

    发明人： Lake, Russell ,  Inman, James B. ,  Ridgeway, Roger

    IPC分类号： G21C3/02 ,  G21C3/26 ,  G21C21/02 ,  G21C21/04

    摘要： A packing device for filling fuel elements with a powder through a fill aperture in an outer shell of the fuel element, including a stationary base, a clamp assembly including a body defining a bore therein, the bore being configured to slidably receive a fuel element therein, wherein the clamp assembly is movable along a vertical axis with respect to the stationary base, a cam assembly including a cam and a drive motor configured to rotate the cam, wherein rotation of the cam alternatingly raises the clamp assembly up along the vertical axis and subsequently drops the clamping assembly, and a powder reservoir assembly including a powder reservoir and a fill needle in fluid communication with the powder reservoir.