A computational 3D model for the multiscale analysis of nuclear reactors assembly
Daniele Cerroni, Roberto Da Vià, Sandro Manservisi, Paolo Zunino · Journal of Physics Conference Series · 2020
In this work we propose a multiscale model for the evaluation of the temperature field in a nuclear assembly. In particular the zone where the coolant flows is represented as a three dimensional (3D) domain while the fuel rods are taken into account as one-dimensional (1D) inclusion. In this framework the 3D domain is not conformal with the complex fuel rod grid resulting in a small computational cost of the problem. An interesting aspect of this multiscale approach is, as we show in the numerical results section, that by a proper average of the solution we can retrieve the results obtained with the homogeneous model.