非能动安全壳空气冷却系统换热影响因素研究  

Research on Influencing Factors of Heat Transfer of Passive Containment Air Cooling System

作　　者：孙超杰 刘长亮 朱京梅 刘嘉维 Sun Chaojie;Liu Changliang;Zhu Jingmei;Liu Jiawei(China Nuclear Power Engineering Co.,LTD.Beijing 100840,China)

机构地区：[1]中国核电工程有限公司,北京100840

出　　处：《核安全》2021年第6期68-72,共5页Nuclear Safety

摘　　要：小型堆采用内设钢制安全壳和外置混凝土安全壳的双层安全壳结构,非能动安全壳空气冷却系统是小型堆重要的非能动安全系统之一。采用Flow Simulation软件对该系统进行三维建模和计算分析,通过研究入口倾角、入口面积、空气导流板距钢壳间距、扩散区域高度等因素对系统换热特性的影响,指导系统设计的优化。结果表明:入口倾角宜取45°;系统换热功率随入口面积增大而增大,当增加到一定面积时,换热功率随入口面积增大而趋于平稳;系统换热功率随空气导流板距钢壳间距增大而呈现出先增大后减小的趋势,即存在一个最佳距离,使得换热功率达到最大;系统换热功率随扩散区域高度减小而增大。The small reactor adopts a double-layer containment containing a steel containment shell and an external concrete containment shell.The passive containment air cooling system(PAS)is one of the important passive safety systems for the small reactor.Flow Simulation software is used to carry out three-dimensional modeling and calculation analysis,and the influences of the inlet inclination angle,the inlet area,the distance between the air deflector and the steel shell,and the height of the diffusion area on the heat transfer characteristics of the system are studied to guide the system design optimization.The results show that the inlet inclination angle should be 45°;the heat transfer power of the system increases with the increase of the inlet area,but when the inlet area increases to a certain value,the heat transfer power tends to be stable;the heat transfer power of the PAS system increases first and then decreases as the distance between the air deflector and the steel shell increases,that is,there is an optimal distance to maximize the heat transfer power;the heat transfer power of the system increases as the height of the diffusion area decreases.

关 键 词：小型堆 非能动安全壳 空气冷却 换热功率 影响因素 

分 类 号：TL364.2[核科学技术—核技术及应用]