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Multi-scale simulation method and system for atmospheric diffusion and sedimentation of nuclear substances

A technology of atmospheric diffusion and simulation method, applied in the field of multi-scale simulation of nuclear material atmospheric diffusion and deposition

Pending Publication Date: 2020-11-06
INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-scale simulation method and system for atmospheric diffusion and deposition of nuclear substances, so as to solve the aforementioned problems in the prior art

Method used

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  • Multi-scale simulation method and system for atmospheric diffusion and sedimentation of nuclear substances
  • Multi-scale simulation method and system for atmospheric diffusion and sedimentation of nuclear substances
  • Multi-scale simulation method and system for atmospheric diffusion and sedimentation of nuclear substances

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Embodiment 2

[0094] Such as figure 2 As shown, in this embodiment, a multi-scale simulation system for atmospheric diffusion and deposition of nuclear substances is provided, the system is used to implement the simulation method, and the simulation system includes,

[0095] Meteorological field processing module; used to process the weather forecast field around the radioactive material discharge source to obtain the final weather forecast field;

[0096] Radioactive material decay module; used to calculate the decay process of radioactive material by using the Way-Wigner single exponential decay formula;

[0097] Advective transport module; used to simulate the advective transport process of radioactive materials;

[0098] Horizontal diffusion module; used to simulate the horizontal diffusion process of radioactive materials;

[0099] Vertical diffusion module; used to simulate the vertical diffusion process of radioactive materials;

[0100] Dry deposition module; used to simulate th...

Embodiment 3

[0105] In this embodiment, the method in the present invention is used to carry out the retrospective simulation comprehensive application technology for the leakage accident of the Fukushima nuclear power plant in Japan in 2011. Figure 3 to Figure 6 The detailed simulation and evaluation of the surrounding area and the global simulation results of the Fukushima nuclear power plant leakage accident in Japan are given respectively. From image 3 It can be seen from the results that the developed simulation technology can better characterize the spatial and temporal distribution characteristics of radioactive materials around the Fukushima accident in Japan, and the simulated daily variation characteristics are basically consistent with the observed results. The differences in concentration changes between Ibaraki Prefecture around Fukushima, Japan and Tokyo Ten, which is a little further away, are well reproduced, and the simulated concentration levels of radioactive substance...

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Abstract

The invention discloses a multi-scale simulation method and system for atmospheric diffusion and sedimentation of nuclear substances. The method comprises the steps of nesting a grid triple on an areawhere an emission source to which to-be-simulated radioactive substances belong is located; performing refinement processing on a weather forecast field around the emission source to obtain a fine weather forecast field; correcting the fine meteorological forecast field by utilizing actually measured meteorological observation data around the emission source to obtain a final meteorological forecast field; and according to the total radiation concentration of the to-be-simulated radioactive substances generated by the emission source, performing multi-scale atmospheric diffusion and settlement simulation on the to-be-simulated radioactive substances by utilizing the final meteorological forecast field and combining the decay rule of the to-be-simulated radioactive substances. The invention has the advantages that the influence of large-scale circulation and medium and small-scale meteorological and topographic factors in a region on diffusion and migration of the radioactive substances is comprehensively considered, and key parameters in the diffusion and migration process of the radioactive substances are finely simulated for nuclear leakage accidents in different regions and under different diffusion conditions in China.

Description

technical field [0001] The invention relates to the technical field of atmospheric environment, in particular to a multi-scale simulation method and system for atmospheric diffusion and deposition of nuclear substances. Background technique [0002] After a nuclear accident, the diffusion of radioactive substances through the atmosphere can have a large-scale impact on the environment in a short period of time. In order to protect the health and safety of the public around the nuclear power plant and when there is a sudden leakage, it is necessary to take corresponding emergency protection measures. The prerequisite for decision-making is to accurately estimate the pollution range and area of ​​radioactive material leakage, so as to delineate the warning area and determine the evacuation range of surrounding residents. Therefore, it is very necessary to calculate the concentration distribution of radioactive substances in the air during the nuclear leakage process, and it i...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06T17/20
CPCG06F30/23G06T17/20Y02A90/10
Inventor 葛宝珠陈学舜向伟玲张颖王自发
Owner INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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