Efficient parallel scanning method for nuclear power plant shield calculation

Abstract

The invention discloses an efficient parallel scanning method for nuclear power plant shield calculation. According to the method, a continuous plant shield calculation model is discretized through a fine grid, meanwhile, a find grid region is distributed to a plurality of CPUs, a grid on each CPU is divided into a plurality of parallel units along the axial direction, all the CPUs are coupled together through communication between the parallel units, a two-dimensional grid sub-region is divided into a shape like the Chinese character mi (meaning rice), each CPU sub-region has a self-determined octant scanning order after division, all octants are divided into four groups, angles in the four groups of octants are scanned from four angular points of the two-dimensional grid sub-region to the center at the same time, blocking and non-blocking communication is fully utilized in combination with an internal boundary condition, and therefore convergence and high efficiency of parallel calculation are guaranteed. The method is suitable for large-scale cluster parallel calculation, so that three-dimensional neutron and photon flux distribution of a nuclear power plant is obtained quickly and accurately.

Description

technical field [0001] The invention belongs to the technical field of shielding calculation of nuclear power plant workshops, and in particular relates to an efficient parallel computing method for calculating the fine distribution of three-dimensional neutron and photon flux densities in nuclear power plant workshops. Background technique [0002] The distribution of neutron and photon flux density in a nuclear power plant is very important to the safety and economy of the entire nuclear power plant. The irradiation of neutrons and photons will not only deteriorate the material properties of various equipment in the reactor building, but also affect the health of nuclear power plant workers. The shielding calculation of the nuclear power plant is to accurately obtain the medium and photon flux distribution of the plant. Therefore, shielding calculation has also become a crucial part of nuclear power plant design. [0003] Due to the large size of the nuclear power plant ...

AI Technical Summary

Problems solved by technology

The application with the application number 201610471985.5 proposed a parallel scanning method applied to the reactor core shielding calculation. This method decomposes the three-dimensional geometry into two-dimensional areas, which improves the parallel efficiency. However, each calculation only contains one angle, which is still Unable to meet the needs of large-scale shielding calculations in the entire plant

Images