超临界水自然循环不稳定性起始点判定研究  

The Onset of Supercritical Water Natural Circulation Instability Research

作　　者：马栋梁[1,2,3] 周涛 李兵[1,2,3] 黄彦平 MA Dong-Liang;ZHOU Tao;LI Bing;HUANG Yan-Ping(School of Nuclear science and Engineering, North China Electric Power University, Beijing 102026, China;Institute of nuclear thermal-hydraulic safety and standardization, North China Electric Power University, Beijing 102206, China;Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy, North China Electric Power University, Beijing 102206, China;Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610041, China)

机构地区：[1]华北电力大学核科学与工程学院,北京102206 [2]华北电力大学核热工安全与标准化研究所,北京102206 [3]非能动核能安全技术北京市重点实验室,北京102206 [4]中核核反应堆热工水力重点实验室,成都610041

出　　处：《工程热物理学报》2018年第7期1557-1562,共6页Journal of Engineering Thermophysics

基　　金：北京市自然科学基金(No.3172032);中央高校基本科研业务费专项资金(No.2017XS088)

摘　　要：准确判定自然循环不稳定性起始点,对于超临界水堆安全稳定具有重要的影响。运用神经网络方法,对超临界水自然循环流动不稳定性起始点的判定进行了相关分析。得到了在不同管径、高度差和入口温度条件下自然循环流动不稳定性起始点的相关特征关系图。计算结果表明:随着高度差的增大,自然循环的峰值流量是增大的;随着管径的增大,自然循环的峰值流量也是增大的;随着入口温度的降低,自然循环的峰值流量是增大的;当入口温度较低时,随着管径的变小,稳定阈值的功率下降比较缓慢;当入口温度较高时,随着管径的变小,稳定阈值的功率下降非常迅速。Accurately determine the starting point of natural circulation instability for supercritical water reactor has great effect on the safe and stable. Using neural network method, the supercritical water natural circulation flow instability starting point has carried on the correlation analysis. Under the condition of different pipe diameter, height difference and inlet temperature, the related feature diagrams of natural circulation flow instability is gotten. The calculation results show that： with the increase of height difference, the peak value of natural circulation flow rate is increased; With the increase of pipe diameter, peak value of the natural circulation flow is also increased; With the decrease of the inlet temperature, the peak value of the natural circulation flow rate is increased.When inlet temperature is lower, the decrease of diameter will make temperature threshold power reduction is slower. When inlet temperature is higher, with smaller diameter, stability threshold power decrease is very quickly.

关 键 词：超临界水 自然循环 不稳定起始点 神经网络 

分 类 号：TK123[动力工程及工程热物理—工程热物理]