Gamma radiation modeling calculation simulation method based on CAD model and Boolean operation

Abstract

The invention provides a gamma radiation modeling calculation simulation method based on a CAD model and Boolean operation. The method comprises the following steps: (1) establishing a CAD three-dimensional geometric model of a basic geometric and complex object in three-dimensional modeling software and exporting the CAD three-dimensional geometric model; (2) reading a CAD model of an object, andestablishing a CAD three-dimensional grid model library with a closed surface; (3) for complex geometry which is not in the model base, using Boolean operation between the three-dimensional grid models for expression; (4) sampling a geometric region where a radioactive source is located to generate a point kernel; (5) performing ray tracing based on the CAD three-dimensional grid model; and (6) carrying out gamma radiation calculation by adopting a point kernel method. According to the method, coupling of the simulation scene and the radiation calculation model is achieved, the radiation modeling method is more flexible and efficient, and calculation is simpler and more convenient.

Description

technical field [0001] The invention relates to a gamma radiation modeling calculation simulation method, in particular to a gamma radiation modeling calculation simulation method based on a CAD model and Boolean operations. Background technique [0002] One of the important characteristics of the decommissioning environment of nuclear facilities is that it is radioactive. Its overall cost, related risks, safety measures, equipment and resources are mainly affected by radiation conditions. Ensuring the safety of staff, the public and the environment is the key to restricting the decommissioning of nuclear facilities. Therefore, radiation safety analysis is indispensable. Due to the high radioactivity and high complexity of nuclear facilities, it is impossible to use actual scenarios for personnel training and safety analysis. At present, researchers in different regions of the world are considering using simulation technology for analysis in hazardous environments, which has...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of low efficiency and limited expression range of the model library in complex geometric modeling produced during the decommissioning cutting and dismantling process of nuclear facilities, and propose A gamma radiation modeling calculation simulation method based on CAD model and Boolean operation, which can use the powerful modeling ability of CAD technology to express complex geometry, and use the Boolean operation of CAD 3D mesh model to express beyond the range of the model library Rapid modeling of the geometry, then ray tracing based on the CAD grid model, and finally the radiation calculation of the considered area using the point kernel method, truly realizing the coupling of the simulation scene and the radiation calculation model

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