SPACER GRID OF A NUCLEAR FUEL ASSEMBLY TO PREVENT HIGH FREQUENCY VIBRATION

摘要

Disclosed herein is a spacer grid for a nuclear fuel assembly to reduce high frequency vibration flowed by fluid by improving a strap structure. The spacer grid for a nuclear fuel assembly has dimples or lattice springs for supporting fuel rods and is formed from a plurality of grid strips (110) with lattice cells. But the grid strips (110) has at least one deep holed slots formed to penetrate in a grid area separately from the dimples (D) or the lattice springs. Therefore, the spacer grid can set vibration characteristics thereof in a variety of different options and reduce the high frequency vibration flowed by fluid.