核电厂三维辐射场重构技术可行性研究

he three-dimensional radiation field reconstruction technology can obtain the spatial distribution of radioactive materials and the three-dimensional radiation dose field. Combined with the three-dimensional point cloud information of the building in the radiation imaging space, it can clearly and intuitively visualize the distribution and dose field of unknown radiation sources or radioactive materials in three dimensions. Due to the complex spatial layout of radiation source terms, nuclear power plants have the characteristics of large variations in radiation levels in different regions and complex shielding bodies that cannot be traversed for measurement, resulting in the lack of relevant applications of three-dimensional radiation field reconstruction technology in China. This article compares the current research and development status of three-dimensional radiation reconstruction at home and abroad. It analyzes the feasibility of implementing real-time reconstruction of three-dimensional radiation fields throughout the entire plant in nuclear power plants from four aspects: geometric modeling, source term localization and quantification, radiation field calculation, and three-dimensional visualization simulation. From the perspective of intelligent and digital applications, it provides solutions for improving radiation safety management in nuclear power plants.