核反应堆物理热工耦合的瞬态分析方法研究  

Study on Transient Analysis Method of Physical Thermal Coupling of Nuclear Reactors

作　　者：王昆鹏 许超 李聪新 刘宇生 温丽晶 王宏凯 刘健 Wang Kunpeng;Xu Chao;Li Congxin;Liu Yusheng;Wen Lijing;Wang Hongkai;Liu Jian(Nuclear and Radiation Safety Center,MEE,Beijing 100082,China)

机构地区：[1]生态环境部核与辐射安全中心

出　　处：《核安全》2019年第6期12-17,共6页Nuclear Safety

摘　　要：核反应堆瞬态分析是核反应堆安全事故分析的基础,核反应堆的设计和事故分析往往都希望得到最接近堆芯实际功率的功率值,因此,准确地模拟中子通量密度的空间分布及瞬态变化非常重要。另外,中子通量的分布会对核材料的温度和密度造成影响,这些反过来又会影响中子通量的分布。因此,考虑物理热工耦合的中子动力学是核反应堆瞬态分析的关键。物理热工耦合的方式包括内部耦合、外部耦合和混合耦合3种方式。根据物理热工采用的不同方法,又分为点堆耦合和多维耦合,每种方式都有不同的特点,可根据计算目的进行选用。本文分析了各种耦合方法的优缺点,研究了耦合的计算方法,可以为反应堆物理热工耦合的瞬态分析提供参考。Transient analysis of nuclear reactor is the basis of safety accident analysis.The aim of nuclear reactor design and accident analysis is to get closest results to the actual power of the reactor core,so it is important to accurately simulate the spatial distribution and transient of neutron flux density.On the other hand,the distribution of neutron flux affects the temperature and density of nuclear materials,which in turn affects the distribution of neutron flux.Therefore,the neutronic thermalhydraulic coupling method is crucial to analyze the transient of nuclear reactor.Physical thermal coupling includes internal coupling,external coupling and mixed coupling.According to the different methods adopted by physical thermal engineering,it can be divided into point-heap coupling and multi-dimensional coupling.Each method has different characteristics and can be selected according to different calculation purposes.In this paper,the advantages and disadvantages of various coupling methods are analyzed,and the calculation method of coupling is studied.

关 键 词：中子动力学 物理热工耦合 瞬态 

分 类 号：TL31[核科学技术—核技术及应用]