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    Nuclear fuel assembly with hydraulically balanced mixing vanes
    1.
    发明授权
    Nuclear fuel assembly with hydraulically balanced mixing vanes 失效
    具有液压平衡混合叶片的核燃料组件

    公开(公告)号：US06526116B1

    公开(公告)日：2003-02-25

    申请号：US08887017

    申请日：1997-07-02

    申请人： Quang M. Nguyen ,  Yu C. Lee ,  Edmund E. DeMario ,  Jeffrey J. Fodi ,  Darin L. Redinger ,  Levie D. Smith, III

    发明人： Quang M. Nguyen ,  Yu C. Lee ,  Edmund E. DeMario ,  Jeffrey J. Fodi ,  Darin L. Redinger ,  Levie D. Smith, III

    IPC分类号： G21C3322

    CPC分类号： G21C3/352 ,  G21C3/322 ,  G21Y2002/302 ,  G21Y2002/303 ,  Y02E30/38

    摘要： A support grid for laterally maintaining the relative position of elongated fuel elements within a fuel assembly for use within a core of a nuclear reactor. The grid is formed in the shape of a lattice with the intersecting lattice members defining a plurality of cells, most of which respectively support the nuclear fuel elements. The remaining cells support nuclear control rod guide tubes and instrumentation thimbles. The cells supporting the nuclear fuel elements are provided with diagonally positioned springs on two, adjacent walls. The springs support the fuel elements against dimples which protrude from the opposite cell walls. The adjacent, diagonal springs in each fuel element cell are inclined in opposite directions. The walls of the cells supporting the control rod guide tubes are embossed along their height at the locations intermediate the intersection between adjoining walls with a concave notch having a curvature which conforms to the outside surface curvature of the control rod guide tubes. The grid is provided with mixing vanes which are positioned in a symmetrical, regional pattern, with the pattern varying between adjacent regions, and configured such that the hydraulic forces across the center of the grid are balanced. The grid is reinforced with welds at the mid point of the intersection of the lattice straps.

    摘要翻译： 用于横向维持细长燃料元件在燃料组件内的相对位置以用于核反应堆的核心内的支撑网格。 栅格形成为具有限定多个单元的相交晶格构件的格子形状，其中大部分单元分别支撑核燃料元件。 剩余的电池支持核控制杆导管和仪表套管。 支撑核燃料元件的电池在两个相邻的壁上设置有对角定位的弹簧。 弹簧将燃料元件抵靠从相对的细胞壁突出的凹坑。 每个燃料元件单元中相邻的对角弹簧在相反方向上倾斜。 支撑控制棒引导管的单元的壁在其相邻壁之间的相交处之间的位置处沿着它们的高度被压印，凹槽具有符合控制棒导管的外表面曲率的曲率。 格栅设置有以对称的局部图案定位的混合叶片，其中图案在相邻区域之间变化，并且构造成使得横跨网格中心的液压力平衡。 格栅在格子带交叉点的中点用焊缝加固。

    Nuclear fuel assembly grid with diagonal fuel retaining springs
    2.
    发明授权
    Nuclear fuel assembly grid with diagonal fuel retaining springs 失效
    具有对角燃料保持弹簧的核燃料组合电网

    公开(公告)号：US6144716A

    公开(公告)日：2000-11-07

    申请号：US887016

    申请日：1997-07-02

    申请人： Quang M. Nguyen ,  Edmund E. DeMario

    发明人： Quang M. Nguyen ,  Edmund E. DeMario

    IPC分类号： G21C3/34 ,  G21C3/356

    CPC分类号： G21C3/3563 ,  Y02E30/40

    摘要： A support grid for laterally maintaining the relative position of elongated fuel elements within a fuel assembly for use within a core of a nuclear reactor. The grid is formed in the shape of a lattice with the intersecting lattice members defining a plurality of cells, most of which respectively support the nuclear fuel elements. The remaining cells support nuclear control rod guide tubes and instrumentation thimbles. The cells supporting the nuclear fuel elements are provided with diagonally positioned springs on two adjacent walls. The springs support the fuel elements against dimples which protrude from the opposite cell walls. The adjacent, diagonal springs in each fuel element cell are inclined in opposite directions. The springs are formed from narrow, parallel slits in the cell wall that terminate along a line parallel to the line of intersection with the adjacent wall. The spring slits continue along that parallel line in a direction away from the spring to increase its flexure. The lattice is formed in an "egg-crate" pattern with the orthogonal members fitting over opposing vertical slits in the adjoining straps. The vertical slits are extended more than half way over the width of the straps to further increase the flexure of the retaining springs.

    摘要翻译： 用于横向维持细长燃料元件在燃料组件内的相对位置以用于核反应堆的核心内的支撑网格。 栅格形成为具有限定多个单元的相交晶格构件的格子形状，其中大部分单元分别支撑核燃料元件。 剩余的电池支持核控制杆导管和仪表套管。 支撑核燃料元件的电池在两个相邻的壁上设置有对角定位的弹簧。 弹簧将燃料元件抵靠从相对的细胞壁突出的凹坑。 每个燃料元件单元中相邻的对角弹簧在相反方向上倾斜。 弹簧由细胞壁中狭窄的平行狭缝形成，该狭缝平行于与相邻壁交叉的线路终止。 弹簧狭缝沿着平行线沿远离弹簧的方向延伸以增加其挠曲。 格子形成为“蛋箱”图案，正交构件配合在邻接带的相对的垂直狭缝上。 垂直狭缝在带的宽度上延伸超过一半，以进一步增加保持弹簧的挠曲。

    Fretting resistant spring design
    3.
    发明授权
    Fretting resistant spring design 有权
    耐磨弹簧设计

    公开(公告)号：US06310932B1

    公开(公告)日：2001-10-30

    申请号：US09694466

    申请日：2000-10-23

    申请人： Paul M. Evans ,  Quang M. Nguyen ,  John C. Rue, Jr. ,  Gregory D. Livermore ,  Virgil Jamie Vasquez

    发明人： Paul M. Evans ,  Quang M. Nguyen ,  John C. Rue, Jr. ,  Gregory D. Livermore ,  Virgil Jamie Vasquez

    IPC分类号： G21C318

    CPC分类号： G21C3/3563 ,  Y02E30/40

    摘要： A new spring design for a strap employed in a grid of a nuclear reactor fuel assembly includes a pair of ligaments that each connect with the free portion of the retention plate. The ligaments each are equally spaced a certain distant from the termination of the slots within the strap body. The spring additionally includes a spring contact plate that is wider than the connections of the spring ligaments with the free portion to increase the surface area with which the spring contact plate is in contact with and retains the fuel rod, and thus reduces the contact stresses therebetween. The spring contact plate additionally includes an embossed spring contact member protruding outwardly therefrom reduces the frictional stresses on the fuel rod when it is inserted into and removed from the cell and during vibration of the fuel rod and/or the strap.

    摘要翻译： 用于核反应堆燃料组件的网格中的带的新的弹簧设计包括一对韧带，每个韧带与保持板的自由部分连接。 韧带各自与带体内的狭槽的端部相等间隔一定距离。 弹簧还包括弹簧接触板，该弹簧接触板比弹簧韧带与自由部分的连接更宽，以增加弹簧接触板与其接触并保持燃料棒的表面积，从而减小它们之间的接触应力 。 弹簧接触板另外包括从其向外突出的压花弹簧接触构件，当将燃料棒插入和移出电池并且在燃料棒和/或带的振动期间时，减小燃料棒上的摩擦应力。

    Bi-alloy spacer grid and associated methods
    4.
    发明授权
    Bi-alloy spacer grid and associated methods 有权
    双合金间隔网格及相关方法

    公开(公告)号：US07623612B2

    公开(公告)日：2009-11-24

    申请号：US11389793

    申请日：2006-03-27

    申请人： Michael A. Marzean ,  Quang M. Nguyen

    发明人： Michael A. Marzean ,  Quang M. Nguyen

    IPC分类号： G21C3/34

    CPC分类号： G21C3/3408 ,  G21C3/352 ,  G21C3/356 ,  Y02E30/40

    摘要： A bi-alloy spacer grid (BASG) is provided with grid straps and springs made using different zirconium alloys. The grid straps are made from a relatively low growth zirconium alloy, and the springs are made from a relatively high growth zirconium alloy. The springs are coupled to the grid straps by welding, mechanical interference, or secondary forming in place. When subjected to irradiation, the springs grow relative to the grid straps thereby maintaining contact with the fuel rod cladding, while the grid straps resist growth to maintain structural stability of the entire fuel assembly. The optimized balance of the high growth springs and low growth grid straps mitigates the formation of gaps between the fuel rods and grid support structures). The growth properties of the grid straps and springs may be further controlled through optional different fabrication processes.

    摘要翻译： 双合金间隔栅格（BASG）配有网格带和使用不同锆合金制成的弹簧。 网格带由相对低成长的锆合金制成，弹簧由较高生长的锆合金制成。 弹簧通过焊接，机械干涉或二次成形而与网格带相连。 当照射时，弹簧相对于格栅条生长，从而保持与燃料棒包层的接触，而网格带抵抗生长以保持整个燃料组件的结构稳定性。 高增长弹簧和低增长网格带的优化平衡减轻了燃料棒和电网支撑结构之间的间隙的形成）。 可以通过可选的不同制造工艺进一步控制网格带和弹簧的生长特性。