原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2014年
1期
54-60
,共7页
中国实验快堆%温度脉动%大涡模拟%堆芯出口区域%数值分析
中國實驗快堆%溫度脈動%大渦模擬%堆芯齣口區域%數值分析
중국실험쾌퇴%온도맥동%대와모의%퇴심출구구역%수치분석
China Experimental Fast Reactor%temperature fluctuation%large eddy simulation%core outlet region%numerical analysis
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19 K ，显著脉动频率在5 Hz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。
採用CFD軟件Star CCM＋對中國實驗快堆（CEFR）堆芯齣口區域的溫度脈動現象進行瞭數值分析。計算中建立瞭1/4堆芯齣口區域模型，採用額定工況下的堆芯齣口溫度、流量等邊界條件，利用LES方法對該問題進行瞭計算，經分析得齣：CEFR功率運行時堆芯齣口區域下部的溫度脈動主要集中在邊緣組件（鋼組件、調節棒組件）上方區，齣口區域上部的溫度脈動在各組件上方區均很顯著。最大脈動振幅為19 K ，顯著脈動頻率在5 Hz以下，屬于典型的低頻脈動。所得結論對下一步實驗工作具有積極的指導意義。
채용CFD연건Star CCM＋대중국실험쾌퇴（CEFR）퇴심출구구역적온도맥동현상진행료수치분석。계산중건립료1/4퇴심출구구역모형，채용액정공황하적퇴심출구온도、류량등변계조건，이용LES방법대해문제진행료계산，경분석득출：CEFR공솔운행시퇴심출구구역하부적온도맥동주요집중재변연조건（강조건、조절봉조건）상방구，출구구역상부적온도맥동재각조건상방구균흔현저。최대맥동진폭위19 K ，현저맥동빈솔재5 Hz이하，속우전형적저빈맥동。소득결론대하일보실험공작구유적겁적지도의의。
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 .
