The spacer grid is one of the structural components of the nuclear fuel assemblies for the pressurized light water reactors. The spacer grid supports the fuel rods, guides cooling water, and maintains a coolable geometry under an external impact load,...
The spacer grid is one of the structural components of the nuclear fuel assemblies for the pressurized light water reactors. The spacer grid supports the fuel rods, guides cooling water, and maintains a coolable geometry under an external impact load, such as earthquakes. Through the analysis and test on the spacer grid springs that are conceptually derived from the engineering point of view by KAERI, shapes of the springs are modified to improve their support performance of the fuel rod in the nuclear reactor core.