一、基本原理零功率反应堆反应性涨落完全是一种随机过程。这种涨落引起了中子密度的随机涨落。反应堆作为输入输出设备,反应性涨落是输入信号,而中子密度的相应涨落是输出信号。这种输入和输出的关系由反应堆的频率响应特性决定。中子信号的自谱密度(APSD)可 First, the basic principle Zero reactive power reactor is a completely random reaction. This fluctuation caused a random fluctuation of neutron density. Reactors as input and output devices, reactive fluctuations are the input signal, and the corresponding fluctuations in neutron density is the output signal. The relationship between this input and output is determined by the frequency response of the reactor. The self-spectral density of neutron signals (APSD) can be