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A Transition Region-Based Monte Carlo and Deterministic Coupled Particle Transport Method

A technology of particle transport and transition area, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of error-prone, error-prone calculation results, manual manual area division relying on user experience, etc., to ensure correct sexual effect

Active Publication Date: 2017-07-04
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the purpose of the present invention is to solve the problem that the manual area division of the existing Monte Carlo and deterministic coupling method relies on user experience and is prone to error, and improves the problem caused by the simple and direct coupling of the two calculations. The calculation results are prone to errors

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  • A Transition Region-Based Monte Carlo and Deterministic Coupled Particle Transport Method

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Embodiment Construction

[0027] The fusion shielding benchmark example is a neutron benchmark example released by the Alamos National Laboratory in the United States in 1991. The present invention selects the 7th device of this model as application example problem. The entire geometry of the model is within a cuboid of 899.16cm×690.85cm×678.18cm. The model contains a 55.88cm thick shielding layer, which is mainly composed of iron and boric acid polyethylene materials. In the cement shielding structure of the model, there is a deuterium-tritium fusion neutron source with an energy of 14 MeV, and the coordinates are (-356.87, 232.02, 157.40). The counting area is all cells in the whole space, and the type is volume flux.

[0028] Preliminary automatic division of deterministic and Monte Carlo particle transport regions:

[0029] According to the geometric characteristics of the fusion shielding benchmark example, select a cube bounding box, take the position of the neutron source as the center of the ...

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Abstract

The present invention discloses a transition region-based Monte Carlo and deterministic coupling particle transport method. Firstly, the geometric complexity is analyzed based on the CAD model, and the geometrically complex region is divided into MC particle transport calculation regions in combination with physical characteristics. , the geometrically simple area is divided into the deterministic particle transport calculation area, and a transition area is created between the two areas according to the physical characteristics and the thickness of the transition area is set; in the particle transport calculation, the Monte Carlo particle transport area and the transition area Carry out Monte Carlo particle transport calculations, and perform deterministic calculations in the deterministic region and transition region. Through multiple iterative calculations, the calculation results of the transition region under the two calculations are consistent, and the seamless coupling of the two calculations is realized. The invention ensures the correctness of the final calculation result through the setting of the transition layer and multiple iterative calculations, and provides an effective particle transport calculation method for large-scale reactor shielding analysis.

Description

technical field [0001] The invention relates to a particle transport calculation method, a transition region-based Monte Carlo and deterministic coupled particle transport method, which is used for reactor shielding analysis in the fields of nuclear physics, nuclear technology applications, and the like. Background technique [0002] At present, there are deterministic method and probabilistic method (Monte Carlo (MC) method) commonly used in particle transport simulation methods, both of which have advantages and disadvantages. The deterministic method is to solve the transport equation by numerical method, which has a fast calculation speed, but cannot deal with complex geometries, and there are many approximations and assumptions in the processing process, and the calculation accuracy decreases sharply with the complexity of the problem. The MC method simulates the process of the interaction and transport of real particles in the material and matter, and performs statisti...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/00G06F30/20G06F2111/08Y02E30/30G21C17/001
Inventor 吴宜灿胡丽琴龙鹏程郝丽娟宋婧
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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