Calculation method for formation of airborne radioactive pollutants on surface water body source item after wet deposition
A calculation method and radioactive technology, applied in the field of radiation protection, can solve the problem of little involvement in simulation, and achieve the effect of migration and diffusion simulation
Active Publication Date: 2019-08-13
CHINA INST FOR RADIATION PROTECTION
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Problems solved by technology
Although the migration and diffusion simulation technology of the water environment is also becoming more and more perfect, the process of pollutants transporting through the atmosphere to the water body and forming the pollutant source term of the water environment is rarely involved in the simulation.
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[0040] An exemplary method for calculating the formation of source items in surface water bodies after wet deposition of airborne radioactive pollutants according to the present invention includes the following steps.
[0041] 1. Simulation of the deposition concentration of radioactive pollutants on the underlying surface
[0042] Using the Lagrangian puff model for simulation calculations, the nuclide change over time is simulated by releasing a series of Gaussian puffs, considering the diffusion parameters related to stability, plume uplift, inversion layer and ground reflection, and wet and dry deposition Factors, simulate the advection transport, diffusion and deposition of each puff in the area, and finally obtain the deposition concentration of radioactive pollutants on the underlying surface.
[0043] 2. Judgment of underlying surface type and calculation of surface source formation
[0044] According to the terrain elevation information and the type of underlying sur...
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The invention belongs to the technical field of radiation protection, and relates to a calculation method for formation of airborne radioactive pollutants on a surface water body source item after wetdeposition. The calculation method comprises the following steps: (1) simulating the deposition concentration of radioactive pollutants on the underlying surface; (2) judging the type of the underlying surface and calculating the formation of a surface source; and (3) calculating a line source formed by surface runoff, wherein the line source calculation comprises rainfall formed slope runoff calculation and transfer calculation after radionuclide settlement. By means of the calculation method for the formation of the airborne radioactive pollutants in the surface water body source item afterwet deposition, migration and diffusion simulation of the radioactive pollutants in the water environment can be achieved.
Description
technical field [0001] The invention belongs to the technical field of radiation protection, and relates to a method for calculating the source term formation of airborne radioactive pollutants in surface water bodies after wet deposition. Background technique [0002] my country is a big country with nuclear energy, and the problem of nuclear pollution is an inevitable problem in the development of the nuclear industry. Since water and the atmosphere are the main environment that people depend on for survival, the migration, diffusion and transportation of radionuclides in the atmosphere and water environment are the main problems faced by nuclear environmental work. [0003] Airborne radioactive pollutants are deposited on the underlying surface through dry and wet deposition processes in the ambient atmosphere. In the case of precipitation, under the comprehensive influence of factors such as rainfall intensity, duration, and soil use type, precipitation forms surface ru...
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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 黄莎邓安嫦徐向军刘团团陈龙泉张艾明辛存田徐成龙胡继民杨彪
Owner CHINA INST FOR RADIATION PROTECTION