Pipe Stress Optimization Analysis Based on MIGA Algorithm

Abstract

In the steam power conversion system, a pipe break in the main steam pipeline through the reactor containment penetration area will have a serious impact on the surrounding environment. In the piping design, the prophylactic measures including optimizing the pipe layout to reduce the pipe stress, reducing the number of branch pipe connections and welds, and implementing special in-service inspection are often adopted to avoid the occurrence of pipe rupture. Therefore, the layout of this section of pipeline is very important, plenty of trial calculation shall be conducted with engineering experience for traditional pipe layout optimization, it is low efficient, and cannot get the optimal stress results. In this paper, ANSYS software is used to analyze the stress of the main steam pipe of a floating nuclear power plant, on the basis of this analysis, MIGA algorithm in Isight software is used to optimize the pipeline layout size parameters. The analysis results showed that the thermal stress of the optimized pipeline was greatly reduced which can reduce the risk of pipeline rupture. The pipe stress optimization analysis in the paper can provide reference for pipeline layout optimization.