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Method for analyzing influence of plume of cooling tower on nuclear waste gas concentration distribution on nuclear island

A technology of exhaust gas concentration and analysis method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficulty in ensuring air quality around nuclear islands, inaccurate radionuclide exhaust gas analysis methods, etc. Emissions, the effect of ensuring air quality

Inactive Publication Date: 2013-01-09
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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Problems solved by technology

However, the Gaussian model is only suitable for occasions where the underlying surface is flat and open, with uniform properties, constant atmospheric conditions, and is not affected by buoyancy and buildings.
[0004] Therefore, the current analysis method for the diffusion concentration of radionuclide waste gas is not accurate, and it is difficult to ensure the air quality around the nuclear island

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  • Method for analyzing influence of plume of cooling tower on nuclear waste gas concentration distribution on nuclear island
  • Method for analyzing influence of plume of cooling tower on nuclear waste gas concentration distribution on nuclear island
  • Method for analyzing influence of plume of cooling tower on nuclear waste gas concentration distribution on nuclear island

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Embodiment Construction

[0019] In order to facilitate the understanding of the present invention, the following will be described in conjunction with the accompanying drawings.

[0020] The abbreviations and proper nouns used in the present invention are first described as necessary:

[0021] Plume: Generally refers to the effluent in water or air. In this patent disclosure, it only refers to the visible plume of moist air released from the cooling tower to the atmosphere.

[0022] Radionuclide waste gas: generally refers to the ventilation gas from the nuclear island plant and the process gas from the reactor main circuit system, generally containing radioactive nuclides, such as iodine-131, etc.

[0023] Computational Fluid Dynamics (CFD): refers to a method and technology that uses a computer to solve fluid dynamics problems using numerical calculation methods.

[0024] ANSYS Fluent: One of the large-scale general-purpose computational fluid dynamics software.

[0025] UDF: User-defined function...

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Abstract

The invention provides a method for analyzing the influence of plume of a cooling tower on nuclear waste gas concentration distribution on a nuclear island. The method comprises the following steps of: building a calculation domain according to relative positions and geometric sizes of the cooling tower and a high-altitude chimney on the nuclear island; building a calculation grid of a calculation domain; in the calculation domain, presetting environment wind speed and turbulent intensity at different heights; acquiring nuclide decay source items; building a three-dimensional turbulent transportation model in the calculation domain; setting a boundary condition of the calculation domain; solving the three-dimensional turbulent transportation model according to the preset environment wind speed and the preset turbulent intensity at different heights, the nuclide decay source items and the boundary condition, and obtaining nuclear waste gas diffusion concentrations on the nuclear island at different space positions and different moments; and when the nuclear waste gas diffusion concentration is greater than a preset concentration value, reducing the nuclear waste gas discharging speed of the high-altitude chimney on the nuclear island. Compared with the conventional method, the diffusion situation of the nuclear waste gas around the nuclear island can be accurately reflected; and the air quality around the nuclear island can be guaranteed.

Description

technical field [0001] The invention relates to the field of nuclear kinetic energy power generation exhaust gas treatment, in particular to an analysis method for the influence of cooling tower plume on the concentration distribution of nuclear island nuclear exhaust gas. Background technique [0002] Under normal operation and accident conditions, the nuclear power plant will release radioactive nuclide waste gas to the atmosphere through the high-altitude chimney of the nuclear island. Under accident conditions, the spread of radionuclide waste gas will have a serious impact on the environment and pose a serious threat to human health. The study of the atmospheric diffusion law of nuclear power plant effluent is the basis for the environmental impact assessment of nuclear power plant conventional emissions, especially the assessment of accident consequences. [0003] For the study of the atmospheric diffusion of nuclear power plant effluents, the Gaussian model is the mo...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 朱嵩何小华龙国庆李波杨志汤东升罗必雄乔旭斌匡俊毛卫兵
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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