Long-term pressure and temperature analysis and suppression pool mixing of Lungmen ABWR containment

Negative pressure difference evaluation of Lungmen ABWR containment by using GOTHIC

“…The ECCS flow rate and setpoints used in this study are the same as those used in the authors' previous study of the long-term containment analysis (Chen and Yuann, 2014). The CST water source is not considered in the long-term containment analysis, because the purpose of that analysis is to obtain the peak suppression pool temperature.…”

“…The peak values are close to those obtained by the lumped wetwell model. Based on the authors' previous study about the long-term containment analysis (Chen and Yuann, 2014), the suppression pool is well mixed in the late period of the LOCA because of the ECCS and RHR suction effect. The lumped wetwell model which implies that the pool is perfectly mixed would be more appropriate than the 1D model.…”

“…Zhao et al (2014) compared the one-dimensional BMIX++, multidimensional GOTHIC and computational fluid dynamics (CFD) results against the POOLEX experiments. Chen and Yuann (2014) investigated the pool mixing effect by the one-dimensional and multi-dimensional wetwell models.…”