Inversion method of three-dimensional radiation field dose

Abstract

The invention discloses an inversion method of a three-dimensional radiation field dose. The inversion method comprises the following steps: S1, carrying out spatial gridding; S2, measuring and calculating a grid node radiation dose value; S3, carrying out interpolation processing on a radiation dose value on a grid line in a horizontal plane; S4, carrying out interpolation processing on an internal radiation dose value of the grid line in the horizontal plane; and S5, carrying out interpolation processing on a radiation dose value in a vertical direction. Under the circumstance that the radiation source is unknown, a few of data in the radiation field are measured; and on the basis of the interpolation algorithm and theory, the radiation dose of the whole radiation field is obtained by inversion, so that a practical problem of inversion of the radiation field is solved. According to the invention, lots of distribution measurement in a spatial region is avoided; inversion of a radiation field is realized based on sparse data; and the work load is low, the measurement is carried out quickly, and the method is simple and is easy to implement.

Description

technical field [0001] The invention relates to the technical field of radiation detection, in particular to a method for inversion of three-dimensional radiation field dose. Background technique [0002] Development depends on the support of energy, and nuclear energy is being favored in the future energy structure. In 2016, countries around the world signed the Paris Agreement, which also acted as a catalyst for the further development of nuclear energy. In the future, nuclear energy is likely to become the energy development choice of many countries in the world. [0003] For radiation protection monitoring and other research topics related to radiation, the construction of radiation field is an unavoidable problem. Nowadays, most of the radiation field problems are obtained by calculating the radiation field through the forward modeling formula. There are few reports at home and abroad on the inversion of radiation field from unknown radioactive sources. In January...

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Problems solved by technology

There are few reports at home and abroad on the inversion of the radiation field of unknown radioactive sources

In January 2015, Luo Wen, Song Yingming and others conducted the research on "Dynamic 3D Radiation Field Simulation Calculation and Visualization of Nuclear Facility Decommissioning Operation Scenarios" based on the Monte Carlo method, but the radiation field construction in this study was based on a large number of points

To carry out a large number of detection points in the radiation space, the workload is heavy, the operation efficiency is low, and it does not match the actual operation state

In addition, if the number of distribution points is reduced, it will cause serious distortion of the radiation field construction

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