Transferencia simultánea de calor y cantidad de movimiento en el núcleo de un reactor rápido enfriado con sodio

The objective of this work is to perform an analysis of the heat transfer and momentum in the core of an SFR. Two cases are analyzed, Case I is an approximation using the average channel methodology, to obtain a representative channel of the core, and Case II is to take a bar arrangement respecting the geometry of the core (hexagonal). Models are coupled into the Comsol Multiphysics computational tool, and solved in a 3D stationary state. Temperature profiles are presented for the fuel, gap, casing and coolant sections, as well as the velocity fields for the gap and coolant and the heat transfer coefficient profiles within the gap, as well as temperatures and average speeds at the interfaces of each section. The average coolant temperature value for Case I is 817.87 K and for Case II it is 816 K, both values are very close to the design value, which is 818 K.