A Radiation Dose Simulation Method for Arbitrarily Shaped Radioactive Sources

A radiation dose and simulation method technology, applied in design optimization/simulation, image analysis, instruments, etc., can solve problems such as inconvenient operation, complex design, no shape geometry, automatic modeling of radioactive sources, and radiation dose calculation and simulation methods , to achieve the effect of simple calculation and flexible modeling method

CN107038322BActive Publication Date: 2020-04-07HARBIN ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-04-07

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Abstract

The invention provides a radiation dosage simulation method of a radioactive source with any shape. The method comprises the following steps of: (1) establishing a three-dimensional geometric model of an object in three-dimensional modeling software, and exporting the three-dimensional geometric model as initial input; (2) reading a three-dimensional model file of the object and obtaining a mesh model of the object; (3) carrying out space partition; (4) carrying out rough approximation on the object by adoption of a cuboid; (5) carrying out refined approximation on the surface of the object by adoption of a triangular facet; (6) carrying out sampling to generate point core; and (7) carrying out gamma radiation dosage calculation by adoption of a point core method. According to the method, a geometric model file is not written manually, the automatic modeling of a geometry and the radioactive source with any shape is realized by means of a virtual reality technology, and a point core generation manner adopts a random sampling manner, so that the modeling method is more flexible and efficient and the calculation is more simple and convenient.
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Description

technical field

[0001] The invention relates to a gamma radiation dose simulation method of a radioactive source. Specifically, it is a method for calculating and simulating gamma radiation of arbitrary-shaped geometries and radioactive sources produced during the decommissioning of nuclear facilities. Background technique

[0002] The decommissioning of nuclear facilities is the last important link in the life cycle management of nuclear facilities. Due to the fact that the equipment itself is activated by neutrons or polluted by radionuclides during the operation of nuclear facilities, the construction environment for decommissioning nuclear facilities has strong radioactivity, and the system composition is complex, including primary and secondary circuits and corresponding auxiliary systems. It has brought great difficulty to the decommissioning construction. The hazards in the decommissioning process of nuclear facilities mainly come from the existence of gamma radiati...

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with accompanying drawing:

[0059] In the field of nuclear facility decommissioning simulation of the present invention, the calculation and simulation of gamma radiation is mainly carried out on arbitrary shape geometric bodies and radioactive sources generated during the nuclear facility decommissioning cutting and dismantling process. The invention includes: establishing a three-dimensional geometric model of an object in three-dimensional modeling software and exporting it as an initial input; reading the three-dimensional model file of the object to obtain a grid model of the object; dividing space; using a cuboid to roughly approximate the object model; using a triangle Surfaces are used to accurately approximate the surface of the object model; sampling is used to generate point kernels; gamma radiation dose calculation is performed using the point kernel method.

[0060] The present invention ...