轻水堆核电站燃料棒一旦发生破损,燃料中的放射性裂变产物就会释放到一回路的冷却剂中,会给核电站的安全性和经济性造成不良影响。所以燃料包壳的破损问题是国际上一个重要的研究课题。过去很长一段时间,国内绝大多数动力堆系统破损组件的监测,采用啜吸试验、外观检查、涡流检查等无损探伤方法。这些方法均存在一定的缺陷,如外观检查的方法仅能对组件外侧 In the event of a fuel rod wreck at the LWR nuclear reactor, radioactive fission products from the fuel are released into the primary coolant and adversely affect the safety and economy of the plant. Therefore, the fuel cladding damage problem is an important international research topic. In the past for a long time, most of the domestic power reactor system damage components monitoring, using siphon test, visual inspection, eddy current inspection and other non-destructive testing methods. These methods have some drawbacks, such as visual inspection methods only on the outside of the module