ANTI-FRETTING WEAR SPACER GRID WITH WING SHAPE SPRING AND/OR DIMPLE

摘要

An anti-fretting wear spacer grid with a wing shape spring and a dimple is provided to prevent partial wear and a crack in a curve portion throughout a combustion process of atomic fuel. An anti-fretting wear spacer grid with a wing shape spring and a dimple includes an arch shaped spring, a pair of dimples, and support wings(632). The arch-shaped spring is projected in predetermined longitudinal and transverse directions on an internal spacer grid surface of a unit spacer grid cell partitioned by the spacer grid. The dimples are projected in a direction opposite to a direction of the spring on upper and lower portions of the spring. The support wings are provided at both sides of a spring center portion(633) when a fuel rod is inserted.