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Load balancing parallel method of three-dimensional neutron transport characteristic line method

A feature line method, load balancing technology, applied in complex mathematical operations, chemical process analysis/design, etc., can solve problems such as excessive traffic, and achieve the effect of ensuring load balancing, saving time, and easy load balancing

Active Publication Date: 2019-11-19
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a load-balancing parallel method of the three-dimensional neutron transport characteristic line method that can reduce communication between trajectories, so as to solve the problem of excessive communication volume in the calculation process of the large-scale parallel characteristic line method

Method used

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  • Load balancing parallel method of three-dimensional neutron transport characteristic line method
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  • Load balancing parallel method of three-dimensional neutron transport characteristic line method

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Embodiment Construction

[0042] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0043] At first the technical term involved in the present invention is described as follows:

[0044] Azimuth: the angle in the azimuth plane, the value is [0,2π].

[0045] Polar angle: the angle in the polar plane, the value is [0, π].

[0046] Periodic boundary conditions: Boundary conditions brought about by translational transformations. After the trajectory exits from such a boundary, it will enter from a corresponding boundary, and the direction of the trajectory remains unchanged.

[0047] Reflective Boundary Condition: A boundary condition that makes the trajectory fully reflective. After the trajectory emerges from this boundary, the incident point is the exit point, and the angle becomes the supplementary angle of the original angle.

[0048] Periodic trajectory: After the trajectory exits from a periodic boundary, it enters from anothe...

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Abstract

The invention relates to a load balancing parallel method of a three-dimensional neutron transport characteristic line method. The method is based on geometric symmetry. The method comprises steps ofcalculating the number of angles needing to be considered; calculating the number and length of periodic tracks or reflective tracks at each angle; calculating the load of each process according to the length of the periodic or reflective track, the number of the processes and the number of the tracks, performing ray tracing on each process, and iteratively solving a characteristic equation according to the geometric grid information, completing the material data and the line segment information after ray tracing. According to the method, the periodic trajectory and the reflective trajectory are completely allocated to the threads, parallel tasks can be efficiently allocated, load balance is ensured, and point-to-point communication between the processes is eliminated.

Description

technical field [0001] The invention belongs to reactor neutron transport calculation technology, in particular to a load balancing parallel method of a three-dimensional neutron transport characteristic line method. Background technique [0002] The reactor core is composed of a large amount of fissionable nuclear fuel, in which atomic nuclei undergo nuclear fission reactions with high-speed neutrons traveling through the core. The neutrons with a certain speed produced by the fission reaction continue to react with the rest of the nuclei, so that the chain reaction process can continue. When the number of neutrons increases too fast, the chain reaction is too violent, and the heat in the core cannot be taken away by the coolant in time, which may easily cause accidents; when the number of neutrons continues to decrease, the chain reaction cannot continue, and the reactor will shut down. The type, quantity, and arrangement of fuel in the core may affect the progress of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/11G16C20/10
CPCG06F17/11G16C20/10
Inventor 汪岸单浩栋胡赟方雅胡长军王学松吴明宇杨文徐李张庚
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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