Method for evaluating atmospheric influences caused by airborne emission of liquid-state radioactive effluents of nuclear power plants

Abstract

The invention belongs to the technical field of nuclear radiation evaluation, and relates to a method for evaluating atmospheric influences caused by airborne emission of liquid-state radioactive effluents of nuclear power plants. The method comprises the following steps of: (1) plant site geographic information data and meteorological data acquisition, and three-dimensional meteorological field simulation; (2) cooling tower parameter acquisition and smoke plume lifting simulation; (3) calculation of smoke plume concentrations in a cavity area and a wake flow area; and (4) ground concentrationfield calculation. By utilizing the method, influences, on atmospheric dispersion of airborne radioactive effluents, of cooling tower emission source features and inland plant site complicated meteorological conditions can be comprehensively considered, so that reliable input is provided for evaluating radioactive influences of an emission scheme for converting liquid-state radioactive effluentsof nuclear power plants into gas state through cooling towers, and the evaluation results satisfy the requirements, for model applicability and calculation result reliability, of practical application.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation evaluation, and relates to an atmospheric impact evaluation method for airborne discharge of liquid radioactive effluent of a nuclear power plant. Background technique [0002] At present, liquid radioactive effluents from nuclear power plants are generally discharged through receiving water bodies such as rivers, lakes or oceans. However, for some inland sites, there are no rivers and lakes around the nuclear power plant that can receive liquid radioactive effluents, or although there are rivers and lakes around the nuclear power plant, the water level of the rivers and lakes is too low or the flow is too small to be used as receiving water to receive liquid radioactive effluents. radioactive effluent. Therefore, nuclear power plants built and operated in these environments can choose to convert liquid radioactive effluents into gaseous forms for discharge, and the surrounding atmosphe...

AI Technical Summary

Problems solved by technology

Due to the particularity of the emission source of the air cooling tower, and the inland site often has complex terrain and meteorological conditions, and the frequency of small still winds is high, the point source Gaussian linear plume model usually used in nuclear environmental impact assessment is not suitable for this complex environment. Atmospheric Dispersion Calculation of Airborne Emissions from Cooling Towers under Conditions

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