Experimental and Numerical Results of LIFUS5/Mod3 Series E Test on In-Box LOCA Transient for WCLL-BB

The in-box LOCA (Loss of Coolant Accident) represents a major safety concern to be addressed in the design WCLL-BB (water-cooled lead-lithium breeding blanket). Research activities are ongoing master phenomena and processes that occur during postulated accident, enhance predictive capability reliability numerical tools, validate computer models, codes, procedures for their applications. Following these objectives, ENEA designed built new separate effects test facility LIFUS5/Mod3. Two experimental campaigns (Series D Series E) were executed by injecting water at high pressure into pool PbLi WCLL-BB-relevant parameter ranges. obtained data used check capabilities RELAP5 system code reproduce transient system, chemical model PbLi/water reactions implemented modified version SIMMER codes fusion application, investigate dynamic energy release on structures, provide relevant feedback follow-up campaigns. This work presents simulations Test E4.1. results presented critically discussed. highlight is able connected interaction, parameters agreement with acquired signals. Moreover, first approach SIMMER-RELAP5 code-coupling demonstrate its strength predicting scenario complex geometries, considering multiple physical minimizing computational cost.