Analyses of liquid entrainment through ADS-4 in AP1000 during a typical small break LOCA transient

Although plenty of work has been done around liquid entrainment in the past few decades, the proposed liquid entrainment models rely on data from experiments far from AP600/AP1000 prototypic conditions. In the present study, the RELAP5 code is modified with entrainment onset and entrainment rate correlations obtained from the ATLATS test facility which was constructed using proper scaling criterion to preserve the phenomena in the AP600/AP1000 prototype reactor. Furthermore, liquid entrainment behavior through ADS-4 during a 2-in. cold leg SBLOCA in AP1000 is analyzed.