INERTIA EFFECT OF THE FUELS IN A STORABLE TRANSPORT CASK ON THE IMPACT ACCIDENTS

A storable transport cask named KSC-28 has been developed by KAERI in Korea. The structural evaluation of the KSC-28 cask was carried out for typical impact orientations to assess the inertia effect of the massive weight of spent fuels loaded in the cask on the impact conditions. The impact analysis model considered the internal structures of the cask, such as fuel baskets and basket fixing disc plates, as well as dummy fuel elements. The impact forces, stresses, and deformations were compared for both the empty and loaded casks. The results show that the inertia of fuels increases the impact damage of the cask significantly and changes the stress distributions of the cask.