中子噪声在核反应堆吊篮振动监测中的应用研究  

Application Study on Core Barrel Vibration Monitoring Using Neutron Noise

作　　者：刘才学[1] 魏东[1] 房成春[1] 何绍群[1] 

机构地区：[1]中国核动力研究设计院,成都610041

出　　处：《核动力工程》2006年第1期30-33,共4页Nuclear Power Engineering

摘　　要：通过对临界装置堆芯吊篮激励振动引发中子噪声实验得到的功率谱密度(PSD)进行分析,证实了从中子噪声PSD中获得吊篮振动特性(各阶特征频率)是可行的,并给出了中子噪声探测器PSD幅度与吊篮振动幅度之间的比例因子(刻度因子)的计算方法。针对临界装置测量获得的中子噪声PSD和吊篮振动PSD,实际计算了对应吊篮各阶振型的刻度因子。本文证实,可以通过中子噪声分析,给出吊篮结构的振动频率和振动位移,证实了中子噪声在堆内构件振动监测领域的有效性。The Power Spectrum Density（PSD） of neutron noise induced by the Core barrel vibration of critical installation is analyzed, and the analysis demonstrates the possibility of obtaining the vibration char- acteristic of core barrel from PSD of neutron noise. Calculation methods for the scale factor between PSD of neutron detectors and the vibration amplitude of core barrel are introduced and the corresponding calculation has been carded out. This work verifies that the vibration frequencies and amplitudes can be obtained by analyzing the neutron noise, and indicates that the validity of vibration monitoring to internals using neutron noise.

关 键 词：吊篮 振动 中子噪声 PSD 刻度因子 

分 类 号：TL351.1[核科学技术—核技术及应用] TL363