Research and Application of Automatic Modeling Technology for Mechanical Analysis of Nuclear Power Pipelines Based on PepS

Mechanical analysis of nuclear power pipeline is an important part of nuclear power design. At present, the widely used nuclear-grade pipeline mechanical analysis software in the world is PepS, which almost contains the commonly used standards and specifications in the nuclear power industry. PepS software is used to carry out the mechanical analysis of nuclear-grade pipeline. The key step is building a calculation input pipeline model that accounts for more than 70% of the entire pipe mechanical analysis workload. At the same time, in order to meet the strict process layout requirements of nuclear power, a pipeline usually needs to undergo multiple mechanical analysis and demonstration. There are thousands of pipelines in nuclear power projects, and its mechanical analysis needs to invest a lot of manpower cost. This research deeply analyzes the procedures and principles of PepS calculation input model, the topological structure and geometric characteristics of the 3D model of the pipeline based on the three-dimensional layout design results, and realizes the automatic modeling technology of mechanical calculation input model of nuclear power pipeline based on PepS software through digital and intelligent information technology. The implementation of this technology completely replaces the manual modeling, eliminates the human error of manual modeling, fundamentally liberates the productivity, obtains remarkable economic benefits, and helps the nuclear power design company go hand in hand with multiple projects to realize batch quantitative design and production.