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    SIDE-SLOTTED NOZZLE TYPE DOUBLE SHEET SPACER GRID FOR NUCLEAR FUEL ASSEMBLIES
    1.
    发明申请
    SIDE-SLOTTED NOZZLE TYPE DOUBLE SHEET SPACER GRID FOR NUCLEAR FUEL ASSEMBLIES 有权
    用于核燃料组件的侧压喷嘴类型双层隔板

    公开(公告)号：US20040086072A1

    公开(公告)日：2004-05-06

    申请号：US10452030

    申请日：2003-05-30

    Inventor： Heung Seok Kang ,  Kyung Ho Yoon ,  Hyung Kyu Kim ,  Kee Nam Song ,  Yeon Ho Jung ,  Tae Hyun Chun ,  Dong Seok Oh ,  Wang Kee In

    IPC: G21C003/34

    CPC classification number: G21C3/3566 ,  G21Y2002/303 ,  G21Y2004/30 ,  Y02E30/40

    Abstract: A side-slotted nozzle type double sheet spacer grid for nuclear fuel assemblies is disclosed. The spacer grid includes intersecting inner strips and four perimeter strips. Each inner strip has unit strip parts, each fabricated by integrating two unit sheet parts together into a single structure, such that the two unit sheet parts face each other and a nozzle type coolant channel is defined between the two unit sheet parts. Each perimeter strip is fabricated by integrating an inner thin sheet having the unit sheet parts with a flat outer thin sheet having a width corresponding to the width of the inner thin sheet into a single structure. The coolant channel has one or more outlets formed by cutting an upper portion of one of the two unit sheet parts of each unit strip part. Each unit sheet part has a slot longitudinally formed on each side surface of a spring that is projected from the unit sheet part to support a fuel rod within a four-walled cell. The spacer grid thus effectively deflects and mixes coolants together to improve the heat transfer effect between fuel rods and coolants, and enhances its strength to effectively resist laterally directed forces acting thereon, and remarkably improves spring performance of its fuel rod support parts, thus accomplishing desired soundness of the fuel assemblies.

    Abstract translation: 公开了一种用于核燃料组件的侧槽式喷嘴型双层间隔栅格。 间隔网格包括相交的内条和四条周边条。 每个内条具有单元条部分，每个单元条部分通过将两个单元片部分集成在一起成为单个结构而制成，使得两个单元片部分彼此面对，并且在两个单位片部分之间限定喷嘴型冷却剂通道。 每个周边条通过将具有单位片部分的内部薄片与具有对应于内部薄片的宽度的宽度的平坦外部薄片整合成单一结构来制造。 冷却剂通道具有通过切割每个单位条部分的两个单位片部分之一的上部而形成的一个或多个出口。 每个单位片部分具有纵向形成在弹簧的每个侧表面上的槽，该弹簧从单元片部分突出以将燃料棒支撑在四壁电池内。 因此间隔网格因此有效地将冷却剂偏转并混合在一起以改善燃料棒和冷却剂之间的传热效果，并且增强其强度以有效地抵抗作用在其上的横向定向力，并且显着地改善其燃料棒支撑部件的弹簧性能，从而实现期望的 燃料组件的健全性。

    Duct-type spacer grid with swirl flow vane for nuclear fuel assembly
    3.
    发明申请
    Duct-type spacer grid with swirl flow vane for nuclear fuel assembly 有权
    具有用于核燃料组件的旋流流动叶片的管道型间隔栅格

    公开(公告)号：US20020136349A1

    公开(公告)日：2002-09-26

    申请号：US10116319

    申请日：2002-04-03

    Inventor： Dong-Seok Oh ,  Tae-Hyun Chun ,  Wang-Kee In ,  Kee-Nam Song ,  Hyung-Kyu Kim ,  Heung-Seok Kang ,  Kyung-Ho Yoon ,  Youn-Ho Jung

    IPC: G21C003/34

    CPC classification number: G21C3/322 ,  G21C3/344 ,  G21C3/3566 ,  G21Y2002/201 ,  G21Y2002/303 ,  G21Y2004/30 ,  Y02E30/38

    Abstract: A duct-type spacer grid for nuclear fuel assemblies is disclosed. In this spacer grid, a plurality of duct-shaped grid elements, individually having an octagonal cell, are closely arranged in parallel and are welded together, thus forming a matrix structure. The grid elements do not pass across the center of the subchannel of the assembly, thus effectively reducing pressure loss. Each of the grid elements is formed as an independent cell, and so they effectively resist against a lateral impact. A plurality of integral type swirl flow vanes, having different heights or same height, axially extend from the top of the grid to be positioned within each subchannel. The swirl flow vanes are bent outwardly, and so they do not contact the fuel rods during an insertion of the fuel rods into the cells. In the spacer grid, the fuel rods are supported within the cells by line contact springs without using any dimple. The spacer grid thus uniformly distributes its spring force on the fuel rods and almost completely prevents damage of the fuel rods due to fretting wear.

    Abstract translation: 公开了一种用于核燃料组件的导管型间隔栅格。 在这种间隔栅格中，多个具有八边形单元格的管状栅格元件被平行地紧密排列并且被焊接在一起，从而形成矩阵结构。 网格元件不会穿过组件的子通道的中心，从而有效地减少压力损失。 每个栅格元件形成为独立的单元，因此它们有效抵抗横向冲击。 具有不同高度或相同高度的多个整体式涡流流动叶片从网格的顶部轴向延伸以定位在每个子通道内。 涡流流动叶片向外弯曲，因此在将燃料棒插入单元中时它们不接触燃料棒。 在间隔网格中，燃料棒通过线接触弹簧支撑在电池内，而不使用任何凹坑。 间隔栅格因此将其弹簧力均匀地分布在燃料棒上，并几乎完全防止由于微动磨损导致燃料棒的损坏。

    Spacing grid of a fuel assembly for a nuclear reactor and fuel assembly
    4.
    发明授权
    Spacing grid of a fuel assembly for a nuclear reactor and fuel assembly 失效
    用于核反应堆和燃料组件的燃料组件的间隔网格

    公开(公告)号：US5966419A

    公开(公告)日：1999-10-12

    申请号：US973199

    申请日：1997-12-03

    Applicant: Bernard Petit

    Inventor： Bernard Petit

    IPC: G21C3/34 ,  G21C3/356

    CPC classification number: G21C3/3566 ,  G21Y2002/303 ,  G21Y2002/40 ,  G21Y2004/30 ,  G21Y2004/304 ,  Y02E30/40

    Abstract: The spacer grids consist of interlaced metal straps defining a regular lattice of cells. A spring for holding a fuel rod against bearing stops is fixed on at least one wall of each of the cells. In its part which constitutes the wall of the cell, the strap includes at least one stop produced by cutting and pushing the metal of the strap into the cell, so as to limit the displacement of a fuel rod housed in the cell. Stops for limiting the displacement of the fuel rod are placed preferably o the walls of the peripheral cells or corner cells of the spacer grid, opposite a peripheral belt of the spacer grid. The invention also relates to a fuel assembly which includes, in addition to structural spacer grids, end grids and additional mixing grids interposed between the structural spacer grids.

    Abstract translation: PCT No.PCT / FR96 / 00989 Sec。 371日期1997年12月3日第 102（e）日期1997年12月3日PCT Filed 1996年6月24日PCT公布。 出版物WO97 / 01849 日期1997年1月16日间隔网格由限定细胞规则格子的隔行金属带组成。 用于将燃料棒保持在轴承座上的弹簧固定在每个电池的至少一个壁上。 在其构成电池壁的部分中，带包括通过将带的金属切割并推入电池而产生的至少一个止挡件，以限制容纳在电池中的燃料棒的位移。 用于限制燃料棒的位移的停止件优选地放置在间隔栅格的外围电池或角电池的壁上，与间隔栅格的周边带相对。 本发明还涉及一种燃料组件，除了结构间隔栅格之外，还包括插入在结构隔离栅格之间的端部栅格和附加混合栅格。

    Nuclear reactor fuel rod spacer
    5.
    发明授权
    Nuclear reactor fuel rod spacer 失效
    核反应堆燃料棒间隔件

    公开(公告)号：US3994779A

    公开(公告)日：1976-11-30

    申请号：US556560

    申请日：1975-03-07

    Applicant: Kenneth Wood Brayman ,  Donald Keith George ,  James Charles Rawlings ,  Gary Errol Dix

    Inventor： Kenneth Wood Brayman ,  Donald Keith George ,  James Charles Rawlings ,  Gary Errol Dix

    IPC: G21C3/356 ,  G21C3/36

    CPC classification number: G21C3/3566 ,  Y02E30/40

    Abstract: A spacer for positioning at least the four corner fuel rods in a tubular flow channel of a nuclear reactor is disclosed. The spacer comprises a support member having four side bands interconnected by four corner bands to form a unitary structure. Each of the side bands has a L-shaped lobe adjacent each of its ends with one leg of each lobe extending to the adjacent end of its side band. Each of the corner bands is narrower than the side bands and is offset so as to be spaced from the lobe. One leg of each lobe is positioned to engage the tubular flow channel to maintain proper spacing between the flow channel and the adjacent corner fuel rod and to improve the thermal-hydraulic performance of the spacer.

    Abstract translation: 公开了一种用于将至少四个角燃料棒定位在核反应堆的管状流动通道中的间隔件。 间隔件包括具有通过四个角带相互连接以形成整体结构的四个侧带的支撑构件。 每个侧带具有邻近其每个端部的L形凸角，每个凸角的一个腿延伸到其边带的相邻端。 每个拐角带都比侧带窄，并且偏移以与叶片间隔开。 每个叶片的一个腿被定位成接合管状流动通道以保持流动通道和相邻角落燃料棒之间的适当间隔并且改善间隔件的热 - 液压性能。

    Nuclear reactor fuel element assembly spacer grid and method of making
    7.
    发明授权
    Nuclear reactor fuel element assembly spacer grid and method of making 失效
    核反应堆燃料元件组件间隔网格和制造方法

    公开(公告)号：US3890196A

    公开(公告)日：1975-06-17

    申请号：US40527773

    申请日：1973-10-11

    Applicant: ATOMIC ENERGY AUTHORITY UK

    Inventor： CHETTER JOHN

    IPC: G21C3/356 ,  G21C3/34

    CPC classification number: G21C3/3566 ,  Y02E30/40 ,  Y10T428/1234

    Abstract: A cellular fuel element assembly spacer grid providing for resilient bracing of fuel pins in the cells of the grid by bow spring locating members projecting inside the cells of the grid to hold the fuel pins against opposed rigid stops also projecting inside the cells of the grid. The grid comprises two tiers each formed from intersecting strip members defining cells which are penetrated by the fuel pins and arranged parallel to one another but spaced apart. The bow spring locating members extend longitudinally between the two tiers and have end ferrules which are a sliding fit on locating members which extend longitudinally from the facing inner edges of the strip members forming the two tiers. The grid tiers are fabricated individually by heat bonding the intersecting strip members prior to assembling the tiers into the spacer grid.

    Abstract translation: 蜂窝式燃料元件组件隔离栅格，其通过弓形弹簧定位构件在网格的单元中弹性地支撑燃料销，从而将栅极的单元内的燃料销保持在相对的刚性挡块上，同时也突出在电网的单元内。 网格包括两层，每层由相互隔开的条状构件形成，这些条形构件限定由燃料销穿透且彼此平行但间隔开的排列的单元。 弓形弹簧定位构件在两个层之间纵向延伸并且具有端部套圈，其滑动配合在定位构件上，所述定位构件从形成两个层的条形构件的相对的内边缘纵向延伸。 在将层组装到间隔网格中之前，通过将相交的带状部件热粘合来单独制造网格层。

    Fuel element grid support for nuclear reactor
    8.
    发明授权
    Fuel element grid support for nuclear reactor 失效
    燃料元件支撑核反应堆

    公开(公告)号：US3769159A

    公开(公告)日：1973-10-30

    申请号：US3769159D

    申请日：1968-06-24

    Applicant: COMBUSTION ENG

    Inventor： ZINN W ,  LICHTENBERGER H

    IPC: G21C3/356 ,  G21C3/34

    CPC classification number: G21C3/3566 ,  Y02E30/40

    Abstract: A support grid for the fuel assembly of a nuclear reactor. The grid being generally of the egg crate type of construction with the crossed grid plates being of a material having a low neutron absorption cross-section (Zircaloy). Springs to prevent fuel element movement are secured to these grid plates with the springs being of a high nickle alloy steel such that their load carrying capability resulting from stress relaxation during operation of the reactor is greater than would be the case if fabricated of the material of the grid plates.

    Abstract translation: 用于核反应堆燃料组件的支撑网格。 网格通常是蛋箱类型的结构，其中交叉网格板是具有低中子吸收横截面（Zircaloy）的材料。 用于防止燃料元件移动的弹簧被固定到这些格栅板，弹簧是高镍合金钢，使得它们在反应器操作期间由于应力松弛而产生的载荷能力大于如果制造的材料 格板。

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