本文介绍了利用 SQUID 作敏感器件对反应堆元件进行无损检测的装置原理和设计思想。当锆包壳反应堆元件穿过接收线圈时,便将信号偶合到 SQUID 中去,通过后随的检测线路,从而检出元件各部位可燃毒物 Gd_2O_3的含量、均匀性、含 Gd 区段长度、UO_2芯柱总长等数据。文内初步分析、讨论了高稳定强磁场、室温通孔杜瓦、SQUID 器件及消除磁性夹杂影响等关键技术问题。 This paper introduces the device principle and design idea of ​​using SQUID as a sensitive device for non-destructive testing of reactor components. When the zirconium cladding reactor components through the receiving coil, the signal will be coupled into the SQUID to go through the detection line, which detect the components of the flammable poison Gd_2O_3 content, uniformity, including Gd section length, UO_2 Core column total length and other data. In this paper, the key technical issues such as high stability and strong magnetic field, room temperature through-hole Dewar, SQUID devices and the effect of eliminating magnetic inclusions are discussed.