核反应堆吊篮(下部堆内构件)筒体上安装的部件在产生缺陷需进行更换时,须对其筒体曲面进行精确测量。通过对某核电厂吊篮筒体外侧辐照监督管安装曲面进行水下精密测量技术开发及时实施过程进行分析,结果证明,采用高精度数字探规、光栅尺位移传感器和定向运动滚珠导轨的组合测量装置,可实现在高辐照条件下进行空间曲面水下精密测量。 Nuclear reactor basket (lower reactor internals) Cylinder mounted components in the production of defects to be replaced, the cylinder surface must be accurately measured. Through the analysis of the installation process of the surface of the supervisory tube for underwater supervisory control of a nuclear power plant basket outside the tube, the results show that the combination of high precision digital probe, grating displacement sensor and directional ball guide The measuring device enables underwater curved surface measurement under high-irradiance conditions.