核电厂一回路、二回路系统管道如主管道、主给水管道、主蒸汽管道等安装有大量射线插塞，其同属于回路高温高压核压力边界，主要用于管道环焊缝的定期射线在役检查。针对插塞失效情况，制定了一个磁粉检测、渗透检测以及相控阵超声检测相结合的无损检测方案，并利用该方案对射线插塞进行检测。检测结果表明，对于射线插塞角焊缝及密封焊缝，采用单一方法实施检测均有可能造成特定缺陷的漏检。因此，密封焊缝应采用液体渗透检测法进行检测，角焊缝应采用相控阵超声与磁粉检测相结合的方式实施检测。

A large number of ray plugs are installed in the primary and secondary loop system pipelines of nuclear power plants, such as the main pipeline, main water supply pipeline, main steam pipeline, etc., which belong to the loop high temperature and high pressure nuclear pressure boundary and mainly used for regular radiographic in-service inspections of pipeline girth welds. In view of the failure of the plug, a non-destructive testing technology combining magnetic particle testing, penetrant testing and phased array ultrasonic testing was developed, and the ray plug was tested. The test results show that for the nondestructive testing of ray plug fillet welds and sealed welds, using a single testing method may cause missed inspections of specific defects. Therefore, the liquid penetration testing method should be adopted for the sealing weld, and the phased array ultrasonic and the magnetic testing should be used for the detection of the fillet weld.