DEVELOPMENT OF KATS - ECO-FRIENDLY SPENT FUEL TRANSPORT AND STORAGE CASK

A new type of Eco-friendly Spent Fuel Transport and Storage Cask named KATS has heen developed, of which the main gamma shielding is provided by lead blocks. This structure enables to dismantle the cask body easily after the lifetime of the cask. The main body of KATS consists of the alloy steel plates, such as inner shell and outer shell. The copper fins connect inner shell and outer shell to remove thennal heat of spent fuels to outside of the cask, and the lead blocks are only inlaid with neutron shielding blocks into the lodgment between these shells and copper fins. Consequently, the amount of dismantle radioactive waste of KATS is minimized because only the inner shell, inner bottom and lid should be disposed and the other materials can be reusable. The safety aspect of this structure such as the radiation streaming at the gap between fin and shielding blocks is investigated and solutions are discussed.