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A Load Balanced 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: 2021-05-04
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • A Load Balanced Parallel Method of Three-Dimensional Neutron Transport Characteristic Line Method
  • A Load Balanced Parallel Method of Three-Dimensional Neutron Transport Characteristic Line Method
  • A Load Balanced 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 the three-dimensional neutron transport characteristic line method, which calculates the number of angles to be considered according to the symmetry of the geometry, and calculates the number of periodic or reflective trajectories at each angle and length, according to the length of the periodic or reflective trajectory, the number of processes, and the number of trajectories, calculate the load of each process, perform ray tracing on each process, and according to the geometric mesh information, material data, and ray tracing after completion Line segment information, iteratively solve the characteristic equation. The invention completely distributes periodic traces and reflective traces to threads, can efficiently allocate parallel tasks, ensure load balance, and eliminate point-to-point communication between processes.

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 Patents(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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