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Method for estimating radon emission rate from the surface of evaporation tank for in-situ leaching uranium mining

A radon extraction rate and in-situ leaching technology, applied in the field of radiation protection

Active Publication Date: 2019-01-01
CHINA INST FOR RADIATION PROTECTION
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Problems solved by technology

[0006] On the other hand, the flow entrainment of radon fluid causes the migration of radon, that is, the passive migration of radon. There are few studies of this kind
[0007] When the in-situ leaching uranium mining process is used, it is necessary to study the precipitation of radon on the surface of the in-situ leaching uranium evaporation pool and estimate the precipitation rate. There is no corresponding scheme in the prior art for reference.

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  • Method for estimating radon emission rate from the surface of evaporation tank for in-situ leaching uranium mining
  • Method for estimating radon emission rate from the surface of evaporation tank for in-situ leaching uranium mining
  • Method for estimating radon emission rate from the surface of evaporation tank for in-situ leaching uranium mining

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Embodiment Construction

[0075] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0076] figure 1 A flow chart of a method for estimating the radon exhalation rate on the surface of an in-situ leaching uranium evaporation pool provided in a specific embodiment of the present invention is shown, the method mainly includes:

[0077] Based on the active diffusion and seepage passive diffusion of radon in the medium, a theoretical calculation formula is established,

[0078] Based on the theoretical calculation formula, the estimated results are obtained,

[0079] Based on the source term inversion method of BP neural network, the estimated results are corrected.

[0080] Furthermore, in this method, input the radon concentration in the liquid at the initial moment, the radon concentration in the air at the initial moment, the uranium content, the effective diffusion coefficient of radon in the liquid, the depth of t...

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Abstract

The invention discloses a method for estimating the surface radon emanation rate of in-situ leaching uranium evaporation pool, which comprises the following steps: based on the active diffusion of radon in medium and the passive diffusion of seepage flow, establishing a theoretical calculation formula, based on the theoretical calculation formula, obtaining an estimation result, and modifying theestimation result by a source term inversion method based on a BP neural network. The theoretical formula of radon exhalation rate is established by this method, considering the active diffusion of radon and the passive diffusion of seepage in the medium synthetically, the BP neural network is used to study the monitoring data and establish the source term inversion method. The predicted data areused to revise the calculation results of the preliminary established estimation method. The method fills the research blank and realizes the accurate estimation of radon emission rate.

Description

technical field [0001] The invention relates to the field of radiation protection, in particular to a method for estimating the exudation rate of radon on the surface of an in-situ leaching uranium evaporation pool. Background technique [0002] The in-situ leaching uranium mining process has significant advantages such as low mining cost, large annual output, fast speed, reduced soil erosion and environmental pollution, light damage to surface vegetation, and less waste residue (tailings), etc., and is favored by people. Gradually replace the previous flotation, heap leaching and pool leaching processes. [0003] However, the gaseous nuclide radon, which is mainly concerned in the in-situ leaching uranium mining process, is soluble, and its parent nuclide radium is also soluble. [0004] Water (liquid) belongs to the non-porous emanation medium, and radon exists in the form of solute in this type of medium, and is completely and uniformly mixed with the medium. The reason...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06N3/08
CPCG06N3/084G06F30/20
Inventor 于志翔廉冰王彦陈海龙王猛康晶赵杨军杨洁苏自强董豫阳罗恺
Owner CHINA INST FOR RADIATION PROTECTION
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