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114 条记录 (耗时 0.018 秒)

    Fission product getter
    1.
    发明授权
    Fission product getter 有权

    公开(公告)号：US10685750B2

    公开(公告)日：2020-06-16

    申请号：US15451719

    申请日：2017-03-07

    申请人： TerraPower, LLC

    发明人： Daniel Eichel ,  James M. Vollmer

    IPC分类号： G21C3/17 ,  G21C3/18 ,  G21C3/32

    摘要： A getter element includes a getter material reactive with a fission product contained within a stream of liquid and/or gas exiting a fuel assembly of a nuclear reactor. At least one transmission pathway passes through the getter element that is sufficiently sized to maintain a flow of the input stream through the getter element at above a selected flow level. At least one transmission pathway includes a reaction surface area sufficient to uptake a pre-identified quantity of the fission product.

    Fuel assembly for a boiling water reactor
    3.
    发明授权
    Fuel assembly for a boiling water reactor 失效
    用于沸水反应堆的燃料组件

    公开(公告)号：US5859886A

    公开(公告)日：1999-01-12

    申请号：US913886

    申请日：1997-09-25

    申请人： Olov Nylund

    发明人： Olov Nylund

    IPC分类号： G21C3/16 ,  G21C3/17 ,  G21C3/326 ,  G21C3/334 ,  G21C3/32

    CPC分类号： G21C3/326 ,  G21C3/17 ,  G21Y2002/201 ,  G21Y2002/302 ,  G21Y2002/402 ,  G21Y2004/30 ,  Y02E30/31 ,  Y02E30/38

    摘要： A fuel assembly for a boiling water reactor comprises a bottom tie plate, a top tie plate, and a first and a second group of vertical fuel rods, each including a column of fuel pellets surrounded by a cladding tube. The second group of fuel rods has a shorter active length than the first group of fuel rods. Both the first and the second group of fuel rods extend between the bottom tie plate and the top tie plate. The second group of fuel rods comprises a fission gas plenum surrounded by a plenum tube arranged above the cladding tube. The main part of the plenum tube has a cross-section area which is smaller than the cross-section area of the cladding tube.

    摘要翻译： PCT No.PCT / SE96 / 00454 Sec。 371日期：1997年9月25日 102（e）1997年9月25日PCT PCT 1996年4月9日PCT公布。 第WO96 / 37895号公报 日期：1996年11月28日沸水反应堆的燃料组件包括底板，顶板和第一组和第二组立式燃料棒，每组包括由包层管包围的燃料柱。 第二组燃料棒具有比第一组燃料棒更短的有效长度。 第一组燃料棒和第二组燃料棒都在底板和顶板之间延伸。 第二组燃料棒包括由布置在包层管上方的增压管围绕的裂变气体增压室。 增压管的主要部分的横截面面积小于包层管的横截面面积。

    Increased fuel column height for boiling water reactor fuel rods
    6.
    发明授权
    Increased fuel column height for boiling water reactor fuel rods 失效
    提高沸水反应堆燃料棒的燃料柱高度

    公开(公告)号：US5219519A

    公开(公告)日：1993-06-15

    申请号：US839424

    申请日：1992-02-21

    申请人： Bruce Matzner

    发明人： Bruce Matzner

    IPC分类号： G21C3/16 ,  G21C3/17 ,  G21C3/326

    CPC分类号： G21C3/326 ,  G21C3/17 ,  G21Y2002/201 ,  G21Y2004/30 ,  Y02E30/31 ,  Y02E30/38

    摘要： A fuel bundle is disclosed in which interspersed part length fuel rods define between the end of the fuel rods and the upper tie plate void regions which are not otherwise occupied. Full length fuel rods adjacent to these regions are provided with an expanded upper plenum region which effectively increases the fuel rod diameter at the end of the upper two phase region of the fuel bundle. Under normal circumstances and a fuel bundle with only full length fuel rods, such an expansion of the upper regions of the fuel rods would cause unacceptable pressure drop. Where such expansion occurs adjacent the vacated volumes created by the part length fuel rods, unacceptable pressure drop does not occur. Consequently, and with the expanded plenum volume, a longer length of active fuel pellets can be accommodated within the full length fuel rods.

    Hydride blister-resistant zirconium-based nuclear fuel rod cladding
    7.
    发明授权
    Hydride blister-resistant zirconium-based nuclear fuel rod cladding 失效
    氢化物防泡锆基核燃料棒包层

    公开(公告)号：US4659545A

    公开(公告)日：1987-04-21

    申请号：US607871

    申请日：1984-05-07

    申请人： Harry M. Ferrari

    发明人： Harry M. Ferrari

    IPC分类号： G21C3/17 ,  G21C3/20 ,  G21C3/06

    CPC分类号： G21C3/20 ,  G21Y2002/104 ,  G21Y2004/10 ,  G21Y2004/30 ,  Y02E30/40

    摘要： A hydride blister-resistant nuclear fuel rod cladding has a tubular cladding formed from a zirconium-based alloy which has a thin nickel base film, of a thickness of about 0.01 to 5 microns distributed over between 1-40 percent of the area of the internal surface of the tubular cladding. The dispersed nickel base film provides multiple sites for hydride transport from the interior of the nuclear fuel rod and prevents localized hydride transport and resulting hydride blistering.

    摘要翻译： 氢化物耐泡沫核燃料棒包层具有由锆基合金形成的管状包层，其具有薄的镍基膜，其厚度约为0.01至5微米，分布在内部的1-40％之间 管状包层的表面。 分散的镍基膜提供了从核燃料棒的内部进行氢化物传输的多个位置，并且防止了局部氢化物传输并导致了氢化物起泡。

    Nuclear reactor component rods and method of forming the same
    8.
    发明授权
    Nuclear reactor component rods and method of forming the same 失效
    核反应堆组件棒及其形成方法

    公开(公告)号：US4609524A

    公开(公告)日：1986-09-02

    申请号：US552227

    申请日：1983-11-16

    申请人： Harry M. Ferrari

    发明人： Harry M. Ferrari

    IPC分类号： G21C7/04 ,  G21C3/17 ,  G21C3/20 ,  G21C7/10 ,  G21C3/00

    CPC分类号： G21C3/20 ,  G21Y2002/104 ,  G21Y2002/201 ,  G21Y2004/10 ,  Y02E30/40

    摘要： A nuclear reactor component such as a fuel rod, burnable absorber rod, or neutron absorber rod, comprising a hermetically sealed metallic tube containing a solid material such as a nuclear fuel, burnable absorber, or neutron absorber, within a helium atmosphere, which solid material will release tritium into the helium atmosphere, has added thereto about 2-3 percent by volume of a gas, selected from oxygen, carbon monoxide and carbon dioxide. The addition of this gas to the helium atmosphere is effective to form an oxide layer on the inner surface of the metallic tube and significantly reduce the permeation of tritium through the metallic tube, such that the tritium is retained within the reactor component.

    摘要翻译： 一种核反应堆部件，例如燃料棒，可燃吸收棒或中子吸收棒，其包括在氦气氛中含有诸如核燃料，可燃吸收剂或中子吸收剂的固体材料的气密密封的金属管，该固体材料 将氚释放到氦气中，加入约2-3％体积的选自氧气，一氧化碳和二氧化碳的气体。 将这种气体添加到氦气氛中有效地在金属管的内表面上形成氧化物层，并且显着地减少氚通过金属管的渗透，使得氚保留在反应器组分内。

    Nuclear fuel element
    9.
    发明授权
    Nuclear fuel element 失效
    核燃料元素

    公开(公告)号：US4557892A

    公开(公告)日：1985-12-10

    申请号：US467801

    申请日：1983-02-18

    申请人： Sei-ichi Komoda

    发明人： Sei-ichi Komoda

    IPC分类号： G21C3/17 ,  G21C3/338 ,  G21C3/18 ,  G21C3/32

    CPC分类号： G21C3/17 ,  G21C3/338 ,  Y02E30/40

    摘要： A nuclear fuel element suitable for use in fast breeder. The fuel element has a clad tube and a wire spacer wound round the clad tube. The clad tube of the fuel element is composed of a first clad tube and a second clad tube which are connected to each other through an intermediate plug. The first clad tube extends upwardly from the intermediate plug. The upper end of the first clad tube is closed by an upper end plug, while the lower end of the second clad tube is closed by a lower end plug. The first clad tube is charged with a multiplicity of fuel pellets, while the second clad tube defines a gas plenum therein. The spaces inside the first and second clad tubes are communicated with each other through vent holes formed in the intermediate plug. The wire spacer is wound round the first clad tube and is fixed at its one end to the end plug attached to the first clad tube and at its other end to the intermediate plug.

    摘要翻译： 适用于快速繁殖者的核燃料元件。 燃料元件具有围绕包层管的包层管和线间隔件。 燃料元件的复合管由通过中间塞相互连接的第一复合管和第二包层管构成。 第一复合管从中间塞子向上延伸。 第一复合管的上端由上端塞封闭，而第二复合管的下端由下端塞封闭。 第一包层管装有多个燃料颗粒，而第二包层管在其中限定气室。 第一和第二包层管内的空间通过形成在中间塞中的通气孔相互连通。 线间隔件缠绕在第一复合管上，并且其一端固定到附接到第一复合管的端塞，并且在另一端固定到中间塞。