ADS铅铋自然循环热分层现象研究  

Thermal Stratification Study on LBE Natural Circulation of ADS

作　　者：苏子威[1,2] 周涛[1] 邹文重[1] 霍启军[1] 

机构地区：[1]华北电力大学核热工安全与标准化研究所,北京102206 [2]中国核电工程有限公司,北京100840

出　　处：《原子能科学技术》2014年第12期2236-2242,共7页Atomic Energy Science and Technology

基　　金：中国科学院战略性先导科技专项资助项目(XDA03040000);国家自然科学基金资助项目(50976033)

摘　　要：为保障加速器驱动的次临界系统(ADS)的安全,采用计算流体力学分析方法,对ADS铅铋自然循环热分层现象进行数值模拟。研究结果表明:铅铋自然循环中,热分层最严重的区域存在于变温段,且在回路中热分层状态不同。回路温差较大时,流速提高,热分层现象较明显。回路管径较大时,流速降低,热分层现象不明显。流速较低时,局部区域热分层现象趋于消失;流速较大时,最大温差截面温差加大。In order to ensure the safety of the accelerator driven subcritical system（ADS）,the numerical simulation for thermal stratification of ADS LBE natural circulation was presented by using computational fluid dynamics（CFD）method.The results show that in LBE natural circulation,the most serious area of thermal stratification exists in heating zone and the hierarchical state of thermal stratification in the loop is different.When the temperature difference in the loop is bigger,the flow velocity increases,and the thermal stratification is more obvious.When the diameter of the loop pipe is larger,the flow velocity becomes lower,and the thermal stratification is not obvious.When the velocity is lower,thermal stratification of local area tends to disappear.When the velocity is bigger,the temperature difference increases in the cross section with maximum temperature difference.

关 键 词：加速器驱动的次临界系统 铅铋合金 自然循环 热分层 

分 类 号：TL333[核科学技术—核技术及应用]