Verifica e validazione preliminare sull'accoppiamento del codice di calcolo RELAP5-3D e il codice di fluidodinamica computazionale ANSYS CFX

This report describes the work performed by the Gruppo di Ricerca Nucleare di San Piero a Grado (GRNSPG) of the University of Pisa (member of CIRTEN consortium) in the frame of the “Accordo di Programma MSE-ENEA sulla Ricerca di Sistema Elettrico - Piano Annuale di Realizzazione 2014”, particularly Project B.3.1, Task LP2.c.1_e. Aim of the work was to further improve and qualify a software interface that allows performing CFD-system code simulations, which had been developed by the same working group during previous PARs. Namely, the coupling tool was parallelized, so as to dramatically improve the cost-effectiveness of the coupled simulations compared to “serial” runs, and further Verification and Validation work was carried out by the simulation of experimental tests dealing with natural and assisted circulation of liquid metals in closed loops.