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JOURNALS // Vestnik Yuzhno-Ural'skogo Gosudarstvennogo Universiteta. Seriya "Vychislitelnaya Matematika i Informatika" // Archive

Vestn. YuUrGU. Ser. Vych. Matem. Inform., 2021 Volume 10, Issue 1, Pages 75–89 (Mi vyurv254)

This article is cited in 1 paper

Code RADUGA T for simulating neutrons fluxes in nuclear power stations

O. V. Nikolaeva, S. A. Gaifulin, L. P. Bass

Keldysh Institute of Applied Mathamatics (Miusskaya Sq. 4, Moscow, 125047 Russia)

Abstract: Design and operation of nuclear power stations (NPS) are followed by simulation of neutron propagation in these stations. It is necessary to consider borders of multi-scale structural elements consisting of different materials. It is desirable to use parallel computer because of big size of NPSs. To keep such conditions, algorithms and codes for solving the integro-differential transport equation on unstructured grids are being developed. In the paper such algorithms included into the code RADUGA T are outlined. Grids, grid schemes, iterative methods to solve grid equations are presented. Calculation parallelization methods for hybrid computers are considered, MPI and OpenMP techniques are used. Methods of building, improvement, decomposition and visuzlisation of spatial grids are considered. Software implementation is described. The algorithms of the code RADUGA T are compared with methods of other codes. Computation parallelization efficiency study results are presented. The problem of neutron multiplication factor calculation in a light-water reactor model is solved. The multi-processor computer MVS-10P of the Joint SuperComputernal Center is used. Acceleration of each algorithm being used and summary acceleration are given.

Keywords: transport equation, unstructured frids, grid schemes, iteration methods, parallel calculation.

UDC: 51.73

Received: 14.07.2020

DOI: 10.14529/cmse210106



© Steklov Math. Inst. of RAS, 2024