核燃料元件是反应堆的核心部件,必须对其进行严格的检测以确保反应堆安全运行。在对核燃料元件进行无损检测时,相对于X射线照相,中子照相具有以下优势:1)中子的穿透能力很强,可穿透厚的燃料元件,检测位于包壳内部的UO2芯块的结构是否完整以及分布状况;2)中子可区 Nuclear fuel elements are the core components of the reactor and must be rigorously tested to ensure safe operation of the reactor. In the case of non-destructive testing of nuclear fuel elements, neutron radiography has the following advantages over radiographic radiography: 1) The penetration of neutrons is strong and can penetrate thick fuel elements and detect the presence of UO2 pellets inside the cladding The structure is complete and distribution; 2) neutrons can be