Method and system for calculating gamma dosage rate based on variable weight discrete

Abstract

The invention discloses a method and system for calculating gamma dosage rate based on variable weight discrete. The method comprises the steps that S1, a geometric center of a volume source or surface source is taken as an original point to establish an X coordinate axis, a Y coordinate axis and a Z coordinate axis respectively; S2, discrete weight parameters are set according to the distance from a to-be-calculated point to each coordinate axis and the maximum size of the volume source or surface source in the direction of each coordinate axis; S3, the volume source or the surface source isdiscretized into a plurality of point sources; S4, the contribution of the gamma dosage rate of each point source is calculated; S5, the contribution of the gamma dosage rate of each point source is accumulated to obtain the gamma dosage rate of the volume source or surface source on the to-be-calculated point; S6, the gamma dosage rate of each volume source or surface source on the to-be-calculated point is accumulated to obtain the final gamma dosage rate of the to-be-calculated point. The method and system for calculating the gamma dosage rate based on the variable weight discrete have theadvantages that according to the different distances between the points to sources, different weights are used, so that the discrete numbers of the volume source or surface source corresponding to thevolume source and surface source are different, not only is the calculated precision of the gamma external irradiation dosage rate ensured, but also the calculation efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of radiation protection, in particular to a discrete gamma dose rate calculation method and system based on variable weights. Background technique [0002] The point kernel integral method is a common method to calculate the γ external radiation dose, which is widely used in shielding calculation and external radiation dose calculation. Compared with the Monte Carlo method, it is not limited by the space size and the thickness of the shielding body, and the The amount of time is small and the calculation speed is fast. The disadvantage is that this method cannot accurately consider the problem of particle scattering. It needs to introduce an accumulation factor to correct the particle scattering, and the calculation results are often conservative. [0003] This method is based on the calculation of isotropic point sources, adopts a discrete method for volume sources or area sources, converts them into severa...

AI Technical Summary

Problems solved by technology

On the one hand, the current traditional point kernel integration algorithm does not optimize the calculation efficiency, and the calculation speed can no longer meet the current needs. On the other hand, with the advantages of the point kernel integration method in the calculation of the gamma radiation field The need for display, the number of lattices representing the three-dimensional radiation field that needs to be calculated is getting larger and larger, which poses a severe challenge to the calculation speed

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