一体化反应堆扰动条件下自然循环特性研究  

Natural Circulation Characteristics of Integrated Reactor under Perturbed Condition

作　　者：孔松 于雷[1] 郝建立[1] 袁添鸿 沈梦思 Kong Song;Yu Lei;Hao Jianli;Yuan Tianhong;Shen Mengsi(Department of Nuclear Science and Engincering,Naval Univetsity of Enginneering,Wuhan,430033,China)

机构地区：[1]海军工程大学核能科学与工程系,武汉430033

出　　处：《核动力工程》2018年第4期53-57,共5页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(11502298)

摘　　要：基于多冷却支路组成的一体化反应堆,推导了多支路自然循环流量的理论解;采用拟合逼近方法得到扰动系数(m),分析了自然循环系统的扰动特性;并以某型一体化反应堆为对象进行验证。结果表明:对于多个冷却支路组成的对称环路系统,当某个支路因排热能力变化发生扰动时,环路流量变化(扰动后稳态值/初值)与系统雷诺数(Re)及上升段与下降段阻力特性比值(Rr)有关;m与Re及Rr有关,并随Rr的减小而增大,且在扰动发生时,m越大,自然循环流量受到的影响越小,即m可以表征自然循环系统的抗扰动能力。Based on a multiple cooling loops integrated reactor, we derived the theoretical solution of the natural circulation flow of multi-loop circuit. The perturbation coefficient m are obtained by using approximation and fitting approach, and the perturbation characteristics of the natural circulation system is analyzed and verified on an integrated reactor. The results indicate that for a symmetrical loop consisted of multiple cooling loops, the change of the flow is a function of Reynolds number Re and the ratio of the rising resistance characteristics and the falling resistance characteristics Rr. The perturbation coefficient m has a close relation with Re and Rr, and increases when Rr decreases. The greater the m, the smaller the effect of the same perturbation on the natural circulation system, that is to say, m can represent the anti-perturbation ability of the system.

关 键 词：自然循环 一体化反应堆 多冷却支路 扰动分析 

分 类 号：TL33[核科学技术—核技术及应用]