Análisis térmico de repositorio de combustible nuclear gastado utilizando ansys y openfoam(c)

Abstract

The use of deep geological formations as a deposit for spent nuclear fuel elements is currently one of the most feasible and safe options.The design and modeling of these deposits require considering many aspects such as the decay heat, which can compromise the security of the deposit. Therefore, it is important to perform a transient thermal analysis taking into account the time-dependent volumetric heat and analyzing parameters such as the temperature on the surface of the containment vessel, or the temperature between the bentonite and the rock. On the other hand, the use of 3D computer simulation, with codes such as ANSYS or OpenFOAM c , allows us to address this type of problems, being a virtual laboratory to evaluate different repositories designs. The contribution of this work focuses on verifying the thermal analysis for six types of spent nuclear fuels, using as a reference the repository for spent fuel or high-level waste in the United Kingdom, which is based on the KBS-3 concept developed by Swedish Nuclear Fuel and Waste Company.