Numerical and Experimental Study of Thermal Stratification Outside a Small SMR Containment Vessel

作者：Albadawi, Gasim; Wang, Shengfei^*; Cao, Xingdi

来源：Sustainability, 2018, 10(7): 2332.

DOI：10.3390/su10072332

• small modular reactor
• natural convection
• thermal stratification

A Small Modular Reactor's (SMR) containment vessel (CNV) is submerged in the reactor cooling pool, which supplies a passive heat sink for containment to remove heat during Loss of Coolant Accident (LOCA). The heat transfer efficiency of passive safety systems is affected by thermal stratification processes. This study aims to explain the phenomenon of thermal stratification in SMR's reactor pool. A small scaled containment vessel with an electric heater inside immersed in a pool of water was used to simulate this phenomenon. The results show how the thermal stratification formed. Moreover, a three-dimensional computational fluid dynamic (CFD) model was built using ANSYS FLUENT. Experimental data were compared with simulation results, and the standard k-epsilon model was found to be suitable for calculating thermal stratification in the pool outside the containment.

• 出版日期2018-7
• 单位华北电力大学