Research on efficient calculation scheme for large domain of reactor core

This paper proposes an efficient calculation scheme to address the issues of low computational accuracy and efficiency in traditional porous media models. These models often fail to clearly define fuel component characteristic regions and suffer from low computational efficiency. The scheme aims to establish a data transfer bridge from refining computational models to porous media models by finely decomposing fuel assemblies, thereby improving calculation accuracy and resolution. Additionally, a fast reconfiguration calculation module based on a flow field reconfiguration scheme is proposed. This module leverages existing cases to rapidly analyze changes under different conditions, offering high computational efficiency and the ability to process batch data. Compared to traditional porous media models, the proposed scheme significantly enhances computational efficiency, reducing the core calculation time to as little as 2–3 s. This work provides valuable reference for efficient calculation and analysis of large domains in reactor cores.