Experimental investigation and SIMMER-III code modelling of LBE-water interaction in LIFUS5/Mod2 facility

In the frame of the THINS Project, an experimental campaign was performed on LIFUS5/Mod2 facility at ENEA RC Brasimone, aiming to investigate the water-LBE interaction. Such a phenomenon occurs as consequence of a postulated Steam Generator Tube Rupture event in a HLMFR system. Four tests were performed injecting sub-cooled water at 40 bar into a reaction vessel partially filled by low pressure LBE at 400°C. The post-test activity was performed by the SIMMER-III code in order to improve the understanding of the involved phenomena and to confirm the code capabilities in simulating the water-LBE interaction. The calculated data showed a qualitatively agreement with the measured values and a faster reaction kinetics due to the modelling assumptions.