Lesson Learned from Drop and Tip-Over Test of a Dry Storage Cask System

To study an appropriate storage system with the consideration of a nuclear power plant situation, a status evaluation of the technology and a feasibility study has been performed in Korea. As a part of doing these, a dry spent fuel storage cask has been developed. The dry storage cask under development consists of a cask body, a canister, and an in-canister structure. 24 fuel assemblies are stored in canister structure. The spacer disks in this in-canister structure are designed to dissipate the heat from the baskets and to provide a lateral support to the baskets. The support rods keep the spacer disks at an even interval. To assess a structural integrity after a hypothetical accident condition of this dry storage system, a 1/4 scale model is fabricated for the drop test. Drop tests of this test model were performed and the test results were also discussed