混装堆芯下300~#池式反应堆瞬发中子衰减常数α实验研究  

Experimental Study of Prompt Neutron Decay Constant α for 300~# Pool Reactor Under Mixed Core

作　　者：曾和荣[1] 段世林[1] 王冠博[1,2] 刘汉刚[1] 钱达志[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [2]清华大学工程物理系,北京100084

出　　处：《原子能科学技术》2013年第1期97-10,共4页Atomic Energy Science and Technology

摘　　要：利用自行研制的反应堆功率谱密度(PSD)测试系统,对300#池式反应堆在混装堆芯下的瞬发中子衰减常数α进行实验研究。利用紧靠堆芯对称布置的两路电离室DL129探测器获得中子在堆内的连续电流信号,并把该信号输入到测试系统,再应用数据采集和数据处理分析程序得到功率谱密度曲线,最后用非线性最小二乘法拟合得到瞬发中子衰减常数α。经比对,该实验结果与理论计算值在误差范围内符合,满足工程实际需求。The experimental study of prompt neutron decay constant α for 300 # pool reactor under mixed core was carried out through a suit of reactor power spectral density measurement system.The two channel continuous current signals of neutron in the reactor were acquired by ionization chamber DL129which was symmetrically putted in reactor core.The power spectral density, for two channel signals, was computed using the application program of data acquirement and data process analysis.Finally, by using the non-linear least squares method, the prompt neutron decay constant αwas fitted.By comparison, the experimental results well accord to the theory calculation within the error range.The deviation can meet the actual need of project.

关 键 词：混装堆芯 300#池式反应堆 功率谱密度 瞬发中子衰减常数α 

分 类 号：TL375[核科学技术—核技术及应用]