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Calculation Method of Diffusion Concentration Distribution of Radioactive Gas in Underground Rock Mass

A radioactive gas, diffusion concentration technology, applied in the field of radiation safety, can solve problems such as radioactive pollution

Active Publication Date: 2020-11-03
CHANGJIANG SURVEY PLANNING DESIGN & RES
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  • Abstract
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Problems solved by technology

Especially airborne radionuclides, if diffused into the atmosphere through the rock mass, will diffuse rapidly with the atmosphere, causing radioactive pollution

Method used

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  • Calculation Method of Diffusion Concentration Distribution of Radioactive Gas in Underground Rock Mass
  • Calculation Method of Diffusion Concentration Distribution of Radioactive Gas in Underground Rock Mass
  • Calculation Method of Diffusion Concentration Distribution of Radioactive Gas in Underground Rock Mass

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] Such as figure 1 As shown, the calculation method of the diffusion concentration distribution of the radioactive gas in the underground rock mass of the present invention has the following steps:

[0041] 1) Model the mountain with excavated underground caverns, and obtain the distribution of groundwater level in the mountain through two-dimensional saturated-unsaturated seepage analysis. The two-dimensional saturated-unsaturated seepage analysis calculates the pressure at (x,y) in the part of the mountain above the groundwater level by solving the two-dimensional saturated-unsaturated seepage governing equation:

[0042]

[0043] Among them, H(m) represents pressure head, t(s) represents time, c(m -1 ) represents the specific water capacity, k(m / s) represents the hydraulic conductivity, x(m) represents the direction posit...

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Abstract

The invention discloses a calculation method for the concentration distribution of radioactive gas diffused in underground rock mass, comprising the steps of: 1) modeling the underground cavern mountain body, and obtaining the water level distribution through two-dimensional saturated-unsaturated seepage analysis; 2) solving the unstable 3) Calculate the diffusion coefficient, adsorption coefficient and absorption coefficient of radioactive gas in the cracked air of underground rock mass, and analyze the half-life of radioactive gas; 4) Establish the two-dimensional unsteady diffusion equation of the radioactive gas in the underground rock mass; 5) Solve the two-dimensional diffusion equation of the radioactive gas in the underground rock mass above the groundwater level to obtain its concentration distribution. The diffusion model of radioactive gas in underground rock mass is established, which can systematically, scientifically and accurately calculate the concentration distribution of radioactive gas in underground rock mass, and provide theoretical support for the prevention and control of radioactive pollution in underground nuclear facilities.

Description

technical field [0001] The invention relates to the technical field of radiation safety, in particular to a calculation method for the concentration distribution of radioactive gas diffused in underground rock mass. Background technique [0002] With the development of the application of nuclear energy technology in the world, the safety requirements of nuclear facilities are getting higher and higher, and the voting rights of the public on the construction of nuclear facilities are also getting higher and higher. This requires technically improving the inherent safety of nuclear facilities, reducing the probability of large-scale release of radioactivity into the environment under extreme accidents, and ensuring the safety of people's lives and property. [0003] Underground nuclear power plants and underground nuclear waste repositories place radioactive devices underground, adding another inherent safety barrier to nuclear facilities—rock mass barriers—in addition to conv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 赵鑫袁博刘海波苏毅金乾杨家胜潘霄陶铁铃汪建刘凯张鹏
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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