在铀溶液核临界安全实验装置上用自行开发的中子噪声准宏观测量系统,开展了中子噪声准宏观分析技术的实验研究。铀溶液装置堆芯容器的内径为400mm,铀溶液浓度为40gU/L,堆芯容器侧面无反射层,底部有混凝土反射层,中心插1根外径为42mm的盲管,放置中子源。堆芯容器两侧布置两支3He正比计数管。实验测量了探测器的自功率谱密度和互功率谱密度,分析得到了 In the uranium solution nuclear criticality safety experimental device, a self-developed neutron noise quasi-macroscopic measurement system was used to carry out experimental research on quasi-macroscopic analysis of neutron noise. The inner diameter of the uranium solution reactor core container is 400mm, the uranium solution concentration is 40gU / L, the reflector side of the reactor core is not reflective, the bottom of the core reactor is a concrete reflector, and a blind tube with an outer diameter of 42mm is inserted in the center to place the neutron source. Two 3He proportional counter tubes are arranged on both sides of the core container. The self-power spectral density and cross-power spectral density of the detector were measured experimentally