Nuclear fuel assembly with seismic/loca tolerance grid

A nuclear fuel assembly grid that includes two zones, a protected zone and a crumbled zone. The crumbled zone occupies the periphery of the grid and is designed to experience plastic deformation underhigh impact loads and the protected zone occupies the interior of the grid where the control rod guide thimbles are located and protects all of the control rod guide thimble locations by experiencingonly plastic deformation under such loads. 本发明公开了种核燃料组件格栅，其包括两个区域，受保护区域和碎裂区域。所述碎裂区域占据格栅的周边，并且被设计成在高冲击载荷下经历塑性变形，所述受保护区域占据格栅的内部，控制棒引导套管位于格栅的内部，并且通过在所述载荷下仅仅经历塑性变形而保护所有控制棒引导套管的位置。