Study on Heat Flow Analysis Modeling for Transport Packages with Radial Fins

Some spent nuclear fuel transport packages have radial fins to enhance heat removal by natural convection during transport placed in horizontal orientation. During the handling, they are temporally located vertically. In this case, heat removal behaviour from outer shell of the packages varies due to change of air flow around the fins from that of horizontal orientation. Therefore, the heat removal performance of the vertically located packages was studied using FLUENT code. The code was verified using the data obtained in the thermal test with a model package. As the test data, results of heat transfer test using test body that imitated a package were used. As results of this study, the heat flow analysis model that demonstrated enough precision was developed. In the future, comparison of the heat removal performance in vertical orientation to that in horizontal orientation will be performed using the developed model.