Study of Heat Transmission Characteristics of Cavity Water of the Spent-Fuel Package

Dense structure spent fuel baskets for transport packages are now commonly used to enclose spent fuels effectively. Recent designs for transporting spent fuels with Channel Boxes (C/B) reduce the fluid area of the water cavity inside the packages and the heat transfer ability of the cavity water is expected to decrease. Therefore, it is very important to study the detailed heat transmission characteristics of the cavity water with experiments. As reported in this study, heat transfer experiments by natural convection with a modeled part of inside of actual transport package and the verification by analysis were performed.