Method for comprehensive evaluation of uranium mining and milling atmospheric radiation environment

Abstract

The invention provides a method for comprehensive evaluation of uranium mining and milling atmospheric radiation environment. The method comprises the following steps: pretreating atmosphere; pretreating terrain; calculating atmospheric diffusion; determining breathed internal radiation dose; determining eaten internal radiation dose; determining dose of external radiation deposited on earth surface; determining dose of external radiation immersed in smoke plume; determining public individual dose; determining public group dose and the like. The method disclosed by the invention has the functional characteristics of being scientific, accurate, rapid and comprehensive, and is suitable for prediction and evaluation on influences of the national uranium mining and milling atmospheric radiation environment; by using the method, the calculation results can preferably satisfy the actual relocation diffusion rules of atmospheric pollutants, and the environmental influences and public dose calculation are more scientific and reasonable.

Description

technical field [0001] The invention belongs to the technical field of environmental impact assessment of the uranium mining and metallurgy industry, and in particular relates to a comprehensive assessment method for the environmental impact of atmospheric radiation used in the uranium mining and metallurgy industry. Background technique [0002] The environmental impact of atmospheric radiation is the main aspect of the impact of uranium mining and metallurgy enterprises on the surrounding environment. The areas where uranium mines are located are mostly mountainous and hilly areas, and the gaseous pollution sources in uranium mining and metallurgy enterprises are mostly point sources and non-point sources, that is, point sources represented by exhaust shafts and tailings (slag) reservoirs, waste The super large non-point source represented by the quarry; the air pollutants emitted by each source item include uranium dust and radon gas. [0003] At present, the calculation...

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Problems solved by technology

This method of simple correction ignores the actual elevation of the pollution source and the predicted point, and cannot simulate the real movement of the plume in the flow field in the complex terrain area, and the error of the prediction result is large

[0007] 3) The environmental impact assessment of atmospheric radiation in uranium mining and metallurgy has the characteristics of large assessment range, many source items in local areas, wide distribution, and complex production status. The current calculation method limits the number of source items to less than 20. For more than 20 source items In the case of items, it is necessary to adopt the method of merging source items with similar distances, which will seriously affect the prediction accuracy

At present, the calculation method of atmospheric radiation environmental impact assessment of uranium mining and metallurgy adopts the polar coordinate system, and only the calculation results of the center points of each fan-shaped sub-area under this coordinate system can be obtained. It is impossible to realize simultaneous prediction at any point and multiple points, and it is difficult to obtain the specific value of the public dose in the main residential areas, which makes the calculation results questionable

At the same time, the original calculation method has a large prediction error for multi-source scattered distribution, and it is prone to misidentification of key resident groups

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