核电厂主泵安全端焊缝体积检测的改进分析

Demonstration of Ameliorate Volumetric Testing in Safe End Welds

部分核电厂使用的主泵在泵壳与主管道之间存在安全端。通过采用超声和射线2种检测技术进行研究,分析比对了法国的《压水堆核岛机械设备在役检查规则》(RSE-M)与美国机械工程师协会(ASME)规范等的相关内容,并就工程实践因素进行了论述,论证了超声相比于射线在技术必要性、规范符合性、实施便利性等方面的优势,证明超声可对主泵安全端焊缝最普遍发生、最危险的裂纹进行准确、持续、经济的在役检查监督。

The main pump used in some nuclear plant has safe ends between the main pump and the main pipe. This paper has studied ultrasonic and radiographic testing techniques. RSE-M and ASME standards were analyzed comparatively, and the engineering practice factors were also discussed. It is proved that UT is accurate, continuous and economical for in-service inspection and supervision of the main pump safe ends crack which is the most common and dangerous.