核电厂主螺栓超声检测与信号分析

依据RSE-M标准需要定期对核电厂反应堆压力容器（RPV）主螺栓进行超声检测，为了保证主螺栓螺纹区及光杆区不同深度刻槽的超声检测灵敏度，本文对检测工艺进行声场仿真计算，分析与判断数据采集中的相关信号与非相关信号，并重点分析裂纹信号的特征，验证了超声工艺的可靠性。结合现场实施案例，通过45°横波端角反射率高的特性，综合其他检测方法如涡流和渗透检测对缺陷性质进行判定，可有效确定异常信号。 

Automatic Ultrasonic and Signal Analysis for Closure Stud of Nuclear Power Station

According to RSE-M standard, the main bolts of reactor pressure vessel (RPV) in nuclear power plants need to be inspected by ultrasonic regularly. In order to ensure the sensitivity of ultrasonic inspection of notches in different depths of stud thread area and rod area, this paper carries out the sound field simulation calculation for the detection process, analyzes the relevant and non relevant signals in data acquisition, and focuses on the characteristics of crack signals to verify the reliability of ultrasonic technology. Combined with the field case, the abnormal signal can be determined effectively by the high reflectivity of 45° S-wave and other detection methods such as eddy current and penetration testing.