A radiation shielding calculation and simulation method of arbitrary shape radiation sources

A technology of radiation shielding and simulation methods, which is applied in design optimization/simulation, calculation, special data processing applications, etc., and can solve the problems of discrete radioactive sources and inaccuracy

Active Publication Date: 2019-01-11
HARBIN ENG UNIV
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Problems solved by technology

The traditional point kernel integration program can only deal with standard-shaped radioactive sources due to its radioactive source cutting method, and cannot accurately discretize arbitrary-shaped radioactive sources.

Method used

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  • A radiation shielding calculation and simulation method of arbitrary shape radiation sources
  • A radiation shielding calculation and simulation method of arbitrary shape radiation sources
  • A radiation shielding calculation and simulation method of arbitrary shape radiation sources

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] The present invention adopts 3dsMax software modeling and C++ language programming, and its main functions are: constructing a nuclear facility model with definite parameters, discretizing radioactive sources into point nuclei by using a voxelization algorithm based on tetrahedron transformation, and using a stylized model reconstruction method to transform the shielding The volume is transformed into a stylized model to calculate the mean free path, and finally the point kernel integral method is used to calculate the radiation field dose distribution to realize radiation simulation. The whole software includes four modules: automatic visual modeling, voxelization and discretization of radioactive sources, stylized reconstruction of shields, and point-core integral calculation.

[0036] The present invention adopts following technical scheme:

[0037] 1. Const...

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Abstract

The invention relates to a radiation shielding calculation and simulation method of arbitrary shape radioactive sources, which relates to the nuclear decommissioning simulation field, in particular toa radiation shielding calculation and simulation method for arbitrary shape radioactive sources. The method comprises the following steps of: (1) constructing a model according to a nuclear facilityand obtaining model parameters; (2) constructing the bounding box and tetrahedron of the radiation source model; (3) calculating the intersection points of the scanning plane and the edges of the tetrahedron to obtain a series of planar triangles; (4) discrete planar triangles are voxels; (5) dispersing the radioactive source into point cores; (6) constructing a mathematical model of the shield according to the bounding box of the shield model; (7) determining an external programming model of the shield object according to the number of vertices of the shield object in the programming model; (8) establishing the internal programming model according to the shell thickness of the shield model; (9) calculating the dosimetric distribution of radiation field by the point kernel integration method. The automatic and visual modeling of radiation dose calculation software for arbitrary shape radioactive source is realized.

Description

technical field [0001] The invention relates to the field of nuclear decommissioning simulation, in particular to a calculation simulation method for radiation shielding of radioactive sources with arbitrary shapes. Background technique [0002] The maintenance and decommissioning of nuclear facilities requires an accurate understanding of the distribution of radiation doses in the three-dimensional space of nuclear facilities. In the decommissioning of nuclear facilities, it is necessary to cut the facilities, which will produce a large number of irregularly shaped radioactive sources. In the radiation simulation process, in order to obtain accurate virtual radiation field dose distribution calculation results, it is necessary to perform radiation shielding calculations for radiation sources with complex shapes. [0003] At present, in terms of dose calculation in the virtual radiation field of nuclear decommissioning, there is no good method for dealing with radioactive s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘永阔杨立群彭敏俊李梦堃沈丹彤
Owner HARBIN ENG UNIV
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