SPACER GRID OF NUCLEAR FUEL ROD

PURPOSE: A damper mounting-type supporting grid of nuclear fuel assembly is provided to minimize the vibration energy which is rapidly delivered to a fuel rod by emitting the vibration energy of the grid. CONSTITUTION: A plurality of strips(110) are formed into a board-shape in a fixed length. The strips are arranged vertically and horizontally in order to partition a plurality of unit lattice cells for supporting the fuel rod. A damper hole(111) is punched on an arbitrary place of the strips. A lot of dimples(120) are projected on the lattice plane of the strip in a fixed direction. A plurality of springs(130) are projected on the lattice plane of the strip in the opposite direction of dimples. The springs elastically support the fuel rods and dimples. The damper is fixed and coupled with the damper hole in order to emit the vibration energy into collision and friction energy. The damper is combined to the inside of the damper hole to be movable.