기기해석용 코드 CUPID를 이용한 코어캐쳐 실험장치의 전산성능예측

다국어 초록 (Multilingual Abstract)

The analysis of a core catcher test facility was carried out using the CUPID, which is a three-dimensional thermal hydraulic code having been developed by KAERL The core catcher is considered as a promising engineered system to stabilize the molten corium emitted from the reactor vessel following core melt and rupture of reactor vessel during a postulated severe accident. Conceptually, the core catcher consists of a carbon steel body, sacrificial material, protection material, and engineered cooling channel. The cooling capacity of the engineered cooling channel should be guaranteed to remove the decay heat of the molten corium. The flow in the core catcher is a combined problem of a two-phase flow in the engineered cooling channel and a single phase natural circulation in the whole core catcher system. The computational analysis using the CUPID code showed that it can appropriately simulate the multi-dimensional boiling phenomena under a low pressure and low flow rate condition.