Modal analysis of alternative spent nuclear fuel transportation cask for normal conditions of transport test

Construction of interim dry storage facility inside or outside of the nuclear power plant is being discussed to solve this problem. Therefore, it is expected that transport of the spent nuclear fuel in the wet storage pools will be conducted within a short time and thus, the safe transport of spent nuclear fuel should be secured. Therefore, it is necessary to perform the normal transport test on the road and sea transport conditions to measure the applied loads to the transportation platform, cask, and fuel assemblies and to check whether the spent nuclear fuels can maintain its integrity under the measured loads. To verify this, normal transport test is being planned to measure shock and vibration loads and strain of fuel rods under normal transport conditions. It is best to perform the normal transport test with a cask which will be used for spent nuclear fuel transport. Modal analysis of the transportation cask for the normal transport test was carried out. Modal analysis of OCL cask and KORAD21 was conducted and discussed. As a result of the modal analysis, it was observed that the major lower order modes were not related to the cask bending or torsional modes but it was related to the bending of torsional deformation of trunion itself.