Simulation of the mixing process in FCIs with hydrodynamic fragmentation model

作     者：LIN Qian CAO Xuewu 

作者机构：School of Nuclear Science and Engineering Shanghai Jiaotong University Shanghai 200240 China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2007年第18卷第4期

页      面：242-246页

核心收录：

学科分类：08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：National Natural Science Foundation of China (No.50576050) 

主　　题：核反应堆 燃料冷冻作用 事故 燃料熔化 

摘      要：Fuel Coolant Interactions (FCIs) are important issues in nuclear reactor severe accident analysis. In FCIs, fragmentation model of molten droplets is a key factor to estimate degree of possible damage. In this paper, the mixing process in FCIs is studied by the simulation of MIXA experiment with hydrodynamic fragmentation model. The result shows that hydrodynamic fragmentation model underestimates the fragmentation rate of high temperature molten droplets under the condition of low Weber numbers. It is concluded that models based on thermal fragmentation mechanism should be adopted to analyze the FCI process and its consequence.