A Radiation Dose Simulation Method for Arbitrarily Shaped Radioactive Sources

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.

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...

AI Technical Summary

Problems solved by technology

However, at present, researchers are usually based on manual design and modeling, which is complex and inconvenient to operate, and there is no automatic modeling method for arbitrary shape geometry and radioactive sources, and radiation dose calculation and simulation methods

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