Abstract: Inland nuclear power is an important choice for the future development of nuclear power in China. Compared with the coastal plant site, the environmental conditions of inland plant site have their own characteristics. In this paper the radioactive effluents source terms calculation and results from third generation NPP such as HPR1000 and AP1000 are introduced, and analysis process of environmental impact of radioactive effluents is described. The differences of atmospheric diffusion conditions and receiving water conditions between inland and coastal nuclear power plants, as well as the requirements of regulations and national standards, are compared and analyzed. Based on the ALARA principle, the methods of reducing the total amount of radioactive effluents and its environmental impact, and the method to adapt to the site lack of receiving water are proposed.

Key words: HPR1000, AP1000, radioactive effluents source terms, environmental impact optimization