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Parallel task division method for multi-geometrical-shape full-reactor core channels for numerical nuclear reactor

A technology for nuclear reactors and task division, which is applied in multi-programming devices, special data processing applications, resource allocation, etc., to minimize communication and ensure load balance.

Active Publication Date: 2019-12-03
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Application Information

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Problems solved by technology

At the same time, since the geometric shapes of different stack types are different from each other, it also brings a lot of challenges to sub-channel task division and area mapping

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  • Parallel task division method for multi-geometrical-shape full-reactor core channels for numerical nuclear reactor
  • Parallel task division method for multi-geometrical-shape full-reactor core channels for numerical nuclear reactor
  • Parallel task division method for multi-geometrical-shape full-reactor core channels for numerical nuclear reactor

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] The invention introduces an adaptive sub-channel parallel area division method, which can adapt to any number of MPI processes (theoretically, the minimum number of MPI processes is 1, and the maximum number of MPI processes is the number of sub-channels of the whole core). During the operation of the region division program, it is necessary to read relevant configuration information (such as component distribution, related geometric information, power distribution, etc.); unique number, and establish the corresponding relationship between components-fuel rods-sub-channels (a component contains multiple fuel rods, and several fuel rods form a sub-channel (wherein, the fuel rods that form a sub-channel can be distributed in different on the component)). It should be pointed out that by defining relevant interfaces in the division program, stack...

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Abstract

The invention relates to a parallel task division method for multi-geometrical-shape full-reactor core channels for a numerical nuclear reactor. The method comprises the following steps: establishinga global index for components, fuel rods and sub-channels in a reactor core; given unique numbers, establishing a corresponding relationship among the components, the fuel rods and the sub-channels; dividing a plurality of sub-channels into a plurality of sub-channels, mapping the connection relationship between the sub-channels into an undirected graph, taking the sub-channels as basic objects, dividing the global sub-channels to each computing unit, forming a division domain by the sub-channels divided to each computing unit, and establishing a ghost sub-channel region between the spatiallyadjacent division domains. A sub-channel parallel task division problem is converted into a graph division problem, parallel thermal hydraulic simulation software can run by using any number of MPI processes through a self-adaptive region division algorithm, and load balance and communication minimization can be guaranteed.

Description

technical field [0001] The invention belongs to thermal-hydraulic simulation technology of nuclear reactors, and in particular relates to a numerical nuclear reactor multi-geometry full-core channel parallel task division method. Background technique [0002] In the thermal-hydraulic simulation of nuclear reactors, the sub-channel method assumes the area between the fuel rods as a "sub-channel", models the sub-channel, and simulates and analyzes the temperature, flow rate and other states in the sub-channel. Since the sub-channel method needs to solve the momentum and energy equations and solve the pressure coefficient matrix on the sub-channel surrounded by fuel rods and the axially layered control body, it is difficult to satisfy this requirement on a single machine or a small cluster for the whole core simulation. Computing power and memory requirements. Therefore, it is inevitable and important to use parallel technology for thermal-hydraulic simulation of the whole cor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/50G06F17/50
CPCG06F9/5027G06F9/505
Inventor 储根深蔡银宇赵民富王明军林超胡长军杨文秋穗正
Owner CHINA INSTITUTE OF ATOMIC ENERGY