中国实验快堆堆芯出口温度脉动的数值分析  

Numerical Analysis of Temperature Fluctuation in Core Outlet Region of China Experimental Fast Reactor

作　　者：朱桓君 许义军[1] 

机构地区：[1]中国原子能科学研究院快堆研究中心,北京102413

出　　处：《原子能科学技术》2014年第1期54-60,共7页Atomic Energy Science and Technology

摘　　要：采用CFD软件Star CCM+对中国实验快堆(CEFR)堆芯出口区域的温度脉动现象进行了数值分析。计算中建立了1/4堆芯出口区域模型,采用额定工况下的堆芯出口温度、流量等边界条件,利用LES方法对该问题进行了计算,经分析得出:CEFR功率运行时堆芯出口区域下部的温度脉动主要集中在边缘组件(钢组件、调节棒组件)上方区,出口区域上部的温度脉动在各组件上方区均很显著。最大脉动振幅为19K,显著脉动频率在5Hz以下,属于典型的低频脉动。所得结论对下一步实验工作具有积极的指导意义。T he temperature fluctuation in core outlet region of China Experimental Fast Reactor （CEFR） was numerically simulated by the CFD software Star CCM ＋ .With the core outlet temperatures , flow s etc . under rated conditions given as boundary conditions ,a 1/4 region model of the reactor core outlet region was established and calculated using LES method for this problem .The analysis results show that while CEFR operates under rated conditions ,the temperature fluctuation in lower part of core outlet region is mainly concentrated in area over the edge components （ steel components ,control rod assembly ） ,and one in upper part is remarkable in area above all the components . T he largest fluctuation amplitude is 19 K and the remarkable frequency is below 5 Hz ,and it belongs to typically low frequency fluctuation .The conclusion is useful for further experimental work .

关 键 词：中国实验快堆 温度脉动 大涡模拟 堆芯出口区域 数值分析 

分 类 号：TL333[核科学技术—核技术及应用]