High-Precision Diameter Detector for Nuclear Power Main Water Supply System Pipelines

In this paper, a high-precision technique for detecting the inner diameter of pipes in the two-loop main feedwater system of pressurized water reactor (PWR) nuclear power plants is proposed, which realizes the accurate detection of the inner diameter of the pipes. Based on the original measurement data, we establish a reference coordinate system and obtain the coordinates of measuring points on the inner wall of the pipe through coordinate transformation. Based on the original data, the reference coordinate system is established, and the coordinates of the measuring points on the inner wall of the pipe are obtained through coordinate transformation. These coordinates, combined with the shape of the inner wall of the pipe, are used to construct a three-dimensional model of the pipe to be measured, allowing us to determine its inner diameter. In addition, based on the proposed diameter detection technology, we have developed the ARE360 diameter detector for pipe measurement and calibrated the offset center of the ranging using the Whale Optimization Algorithm. Finally, the usability and accuracy of the detector are experimentally verified. The experimental results demonstrate that the developed pipeline internal diameter detection equipment can accurately measure the internal diameter of the pipeline of the two-loop main feedwater system of a PWR nuclear power plant.