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。