Method for constructing migration and propagation evaluation model of radioactive substance

Abstract

The invention discloses a method for constructing a migration and propagation evaluation model of a radioactive substance. The method comprises the following steps of S1. determining necessary source items to obtain a total mass of the source items released in the environment in all kinds of release types, and a condition that the total mass changes over time; S2. dividing a source item releasing process into a plurality of smoke plume sections; S3. computing the proportion of each source item released in the environment in each smoke plume section, merging and grouping the source items into a plurality of nuclide groups according to the physicochemical properties, and computing the proportion of each nuclide group according to a ratio of compounds in each source item; S4. dividing an environmental space which needs evaluation into a plurality of space units at varying distances from a smoke plume release point; S5. computing the concentration of each source item in the air space and the concentration of each source item deposited on the ground according to a smoke plume diffusion mode with a changeable wind direction; and S6. displaying a name of each source item, a spatial distance between the smoke plume and the smoke plume release point, and the proportion of residual substances of each source item in the smoke plume after dry and wet deposition. According to the method, modelling is accurate, the accuracy is improved, and the influence of the radioactive substance on the environment is scientifically predicted and coped.

Description

technical field [0001] The invention relates to the field of nuclear radiation safety, in particular to a method for constructing an assessment model for the migration and propagation of radioactive substances. Background technique [0002] Radioactive substances mainly come from the leakage of radioactive substances in nuclear installations (such as nuclear power plants, nuclear power equipment) accidents, and then the radioactive substances diffuse and deposit in the atmosphere, causing radioactive substances to migrate and spread in the environment, causing radiation pollution and damage to the surrounding environment and organisms. harm. [0003] In the event of a nuclear leakage accident, radioactive substances are released from the leak into the atmosphere. It is necessary to take appropriate and rapid protective measures in the area affected by the radioactive substances outside the site and make an optimal emergency decision. Track the dispersion process of radioact...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for constructing a radioactive substance migration and propagation evaluation model for the above-mentioned defects of the prior art that the accuracy is not high enough

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