The Calculation Of The Concentration And The Radiation Dose Of Airborne Radionuclide From Nuclear Power Plant

In order to meet the energy demand of economic sustainable development, actively developing nuclear power has become an important means to increase energy supply and to optimize energy structure in china. At the meaning time of bringing enormous economic and social benefits, nuclear power plant inevitably discharges airborne radionuclide under normal operation. The impacts of airborne radioactive effluent on the surrounding environment have always been given great attention.Determining the concentration of radionuclide is the basis and prerequisite for environmental assessment, radiation protection and other related work. Presented here is the simulation calculation of the diffusion of the radionuclide coming from the Daya Bay nuclear power plant under normal operation by using AIRDOS-EPA code on the basis of Gaussian plume model. The model is modified based on considering practical situation. The monitoring meteorological data are adopted. The mean ground-level concentration distribution of radionuclide from Daya Bay nuclear power plant in 2001 was obtained. The atmospheric dispersion factor and the ground deposition rate were also acquired. These calculation results were analyzed to compared with the natural background values and monitoring values of radionuclide concentration in soil and air.Further, on the basis of a reasonable dose model, the collective effective dose and the maximum individual effective dose of the public are calculated, by using a lot of statistical information of population, agriculture, planting, animal husbandry around Daya Bay nuclear power plant. The calculation results were compared with other human activities.The comparative analysis about the results of the radionuclide concentration and the radiation dose can provide information for understanding the effect on radiation environment due to Daya Bay Nuclear Power Plant under normal operation.