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    Liquid-metal-cooled fast reactor core comprising nuclear fuel assembly with nuclear fuel rods with varying fuel cladding thickness in each of the reactor core regions
    21.
    发明授权
    Liquid-metal-cooled fast reactor core comprising nuclear fuel assembly with nuclear fuel rods with varying fuel cladding thickness in each of the reactor core regions 有权
    液体 - 金属冷却的快堆堆芯包括在每个反应堆核心区域中具有不同燃料包层厚度的核燃料棒的核燃料组件

    公开(公告)号：US08693611B2

    公开(公告)日：2014-04-08

    申请号：US12443519

    申请日：2007-10-16

    Applicant: Ser Gi Hong ,  Yeong-Il Kim ,  Sang Ji Kim ,  Do-Hee Hahn

    Inventor： Ser Gi Hong ,  Yeong-Il Kim ,  Sang Ji Kim ,  Do-Hee Hahn

    IPC: G21C3/32

    CPC classification number: G21C1/022 ,  G21C3/04 ,  G21C5/02 ,  G21C7/005 ,  G21Y2002/304 ,  G21Y2004/30 ,  Y02E30/34 ,  Y02E30/35 ,  Y02E30/39

    Abstract: A liquid-metal cooled fast reactor core having a nuclear fuel assembly constituted of nuclear fuel rods with varying cladding thicknesses in reactor core regions, in which: the nuclear fuel assembly (1) of a liquid-metal cooled fast reactor includes nuclear fuel assemblies (1a, 1b and 1c) in inner, middle and outer reactor core regions, respectively, and is installed in a hexagonal duct (3) with nuclear fuel materials (2-2a, 2-2b and 2-2c) surrounded by respective claddings (2-1a, 2-1b and 2-1c), and the claddings (2-1a, 2-1b and 2-1c) of a nuclear fuel rod (2a) in the inner reactor core region, a nuclear fuel rod (2b) in the middle reactor core region and a nuclear fuel rod (2c) in the outer reactor core region are formed at different thicknesses. The reactor core can flatten power distribution using a single-enrichment nuclear fuel in the liquid-metal cooled fast reactor.

    Abstract translation: 一种液态金属冷却的快堆堆芯，其具有核反应堆核心区域中具有不同包层厚度的核燃料棒组成的核燃料组件，其中：液态金属冷却快堆的核燃料组件（1）包括核燃料组件 1a，1b和1c）分别安装在内，中，外反应堆堆芯区域内，并安装在由相应包层围绕的核燃料材料（2-2a，2-2b和2-2c）的六边形管道（3） 2-1a，2-1b和2-1c）和内反应堆芯区域中的核燃料棒（2a）的包层（2-1a，2-1b和2-1c），核燃料棒（2b） ）和外反应堆芯区域中的核燃料棒（2c）形成为不同的厚度。 反应堆堆芯可以在液态金属冷却的快速反应堆中使用单浓度核燃料来平坦化配电。

    Nuclear reactor core restraint
    24.
    发明授权
    Nuclear reactor core restraint 失效
    核反应堆核心约束

    公开(公告)号：US4859400A

    公开(公告)日：1989-08-22

    申请号：US106590

    申请日：1987-10-13

    Applicant: Andrew F. Curzon

    Inventor： Andrew F. Curzon

    IPC: G21C3/33 ,  G21C1/02 ,  G21C3/12 ,  G21C5/06

    CPC classification number: G21C5/06 ,  G21C1/022 ,  G21C3/12 ,  G21Y2002/104 ,  G21Y2002/204 ,  G21Y2002/207 ,  G21Y2004/30 ,  Y02E30/34

    Abstract: A nuclear reactor fuel core assembly comprises an array of sub-assemblies comprising a central zone of fuel/breeder sub-assemblies (20F) surrounded by an annular zone of shielding sub-assemblies (20S). The fuel/breeder sub-assemblies (20F) are flexibly mounted from the reactor diagrid top plate 26 while the shielding sub-assemblies (20S) are mounted as stiff cantilevers so as to provide resilient restraint against bow of the central sub-assemblies (20S) during reactor operation, the restraint being exerted via abutment pads (40) at the level of the tops of the sub-assemblies (20S, 20F). The central core sub-assemblies (20F) also have abutment pads (34) at a lower level to form a lower restraint plane at this level controlling sub-assembly bowing in the central core zone.

    Abstract translation: 核反应堆燃料芯组件包括一组子组件，其包括由屏蔽子组件（20S）的环形区围绕的燃料/育种子组件（20F）的中心区域。 燃料/育种子组件（20F）从反应器二极板顶板26灵活地安装，而屏蔽子组件（20S）被安装为刚性悬臂，以便提供弹性约束以抵抗中心子组件（20S）的弓 ），所述约束通过在所述子组件（20S，20F）的顶部的高度处的邻接垫（40）施加。 中心芯子组件（20F）还在较低的水平处具有邻接衬垫（34），以在该水平面处形成下限约束平面，从而控制在中央芯区域中的子组件弯曲。

    Doppler reactivity augmentation device
    29.
    发明授权
    Doppler reactivity augmentation device 有权

    公开(公告)号：US12046380B2

    公开(公告)日：2024-07-23

    申请号：US17151012

    申请日：2021-01-15

    Applicant: TerraPower, LLC

    Inventor： Jesse R. Cheatham, III ,  Mark W Reed ,  Micah J Hackett

    IPC: G21C7/02 ,  G21C1/02 ,  G21C7/06 ,  G21C7/08 ,  G21C3/42

    CPC classification number: G21C7/06 ,  G21C1/022 ,  G21C7/02 ,  G21C7/08 ,  G21C3/42 ,  Y02E30/30

    Abstract: A fast neutron nuclear reactor contains a nuclear reactor core having an array of device locations. Some device locations in the nuclear reactor core contain fissile and fertile nuclear fuel assembly devices. One or more other device locations in the nuclear reactor core contain Doppler reactivity augmentation devices that amplify the negativity of the Doppler reactivity coefficient within the nuclear reactor core. In some implementations, a Doppler reactivity augmentation device can also reduce the coolant temperature coefficient within the nuclear reactor core. Accordingly, a Doppler reactivity augmentation device contributes to a more stable nuclear reactor core.

    Active Zone Of Lead-Cooled Fast Reactor
    30.
    发明申请
    Active Zone Of Lead-Cooled Fast Reactor 有权
    铅冷快堆的主动区

    公开(公告)号：US20160351278A1

    公开(公告)日：2016-12-01

    申请号：US15112578

    申请日：2014-11-27

    Applicant: STATE ATOMIC ENERGY CORPORATION "ROSATOM" ON BEHALF OF THE RUSSIAN FEDERATION

    Inventor： Viktor Nikolaevich LEONOV ,  Aleksandr Viktorovich LOPATKIN ,  Elena Aleksandrovna RODINA ,  Yuriy Vasilievich CHERNOBROVKIN

    IPC: G21C3/04 ,  G21C3/58 ,  G21C5/14 ,  G21C1/02

    CPC classification number: G21C3/04 ,  G21C1/02 ,  G21C1/022 ,  G21C3/42 ,  G21C3/58 ,  G21C5/14 ,  G21C2003/045 ,  G21Y2002/50 ,  G21Y2004/10 ,  G21Y2004/30 ,  Y02E30/34 ,  Y02E30/35 ,  Y02E30/38

    Abstract: An active zone includes a homogeneous uranium-plutonium nitride fuel, the mass fraction of which is a minimum 0.305, and consists of central, intermediate and peripheral parts which form fuel assemblies comprising fuel elements with geometrically identical shells but differing heights. The radial distribution of the fuel across the volume of the active zone has a stepped shape. The radius of the central part is from 0.4 to 0.5 of the effective active zone radius, while the height of the fuel column in the fuel elements in the central part is from 0.5 to 0.8 of the height of the fuel column in the peripheral part. The heights of the fuel columns forming a stepped intermediate part for diameters ranging from 0.5 to 0.85 of the effective active zone diameter are within the range from 0.55 to 0.9 of the height of the fuel column in the peripheral part.

    Abstract translation: 活性区域包括均质的铀 - 钚氮化物燃料，其质量分数最小为0.305，并且由中心部分，中间部分和周边部分组成，其形成燃料组件，其包括具有几何相同壳体但不同高度的燃料元件。 燃料在活性区域的体积上的径向分布具有阶梯形状。 中心部分的半径为有效活动区域半径的0.4至0.5，而中心部分燃料元件中的燃料柱的高度为周边部分燃料柱高度的0.5至0.8。 形成直径为有效活性区域直径的0.5至0.85的阶梯式中间部分的燃料柱的高度在周边部分中的燃料柱的高度的0.55至0.9的范围内。

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