Parallelization of Three-Dimensional Thermal-Hydraulic Best-Estimate Code "BAGIRA" for Simulation of Multiphase Flow as Part of Full-Scale Supercomputer Simulator "Virtual Nuclear Power Plant"

V. A. Vasenin , e-mail: vasenin@msu.ru M. A. Kryvchikov , e-mail: maxim.krivchikov@gmail.com, A. E. Kroshilin , e-mail: getget@online.ru, V. E. Kroshilin , e-mail: vkrosh@online.ru, A. D. Ragulin , e-mail: alex.der.igel@gmail.com, V. A. Roganov , e-mail: raduga@butovo.com

This article discusses approach to creating high-performance parallel version of the best-estimate thermal-hydraulic code BAGIRA, which is important part of the software suite for simulation of nuclear power plants with pressurized water reactors.

We will also illustrate our experience with high-performance solvers for numeric sparse matrix factorization, which is used in BAGIRA code during implicit computational method step.

Keywords: simulation, multiphase flow, thermal-hydraulic code, best-estimate code, nuclear reactors, pressurized water reactors, supercomputers, parallel computing

pp. 15–23