蒸汽发生器传热管胀管过渡段水浸超声检查技术

近年来，核电厂提出了对蒸汽发生器传热管胀管过渡段进行检查的要求。由于采用常规涡流检查技术在传热管的胀管过渡段存在盲区，因此开展了传热管胀管过渡段水浸超声检查技术研究，并开发出一套完整的检查技术。通过试验结果分析，证明该技术完全满足蒸汽发生器传热管胀管过渡段检查要求，能够对传统传热管涡流检查形成补充，同时也能够应用于其他薄壁小径管道的检查。 

Immersion Ultrasonic Inspection for Expanding Area of Steam Generator Tubes

In recent years, it is required to inspect the?expanding area of steam generator tubes in nuclear power plants. There?is a?blind area for conventional eddy current testing with Bobbing probes in the expanding area, so?immersion ultrasonic testing from the inside of the tubes was developed. The experiment results showed that, the immersion ultrasonic testing can meet the need of inspection for expanding area of steam generator tubes. The immersion ultrasonic inspection can be a supplement of eddy current inspection, and at the same time, it can be applied in other thin-wall and small diameter tubes. ?