Abstract: Controlling of effluent discharge is a major aspect of environmental radiation protection in nuclear power plants (NPP). The national standard GB 6249—2011 set the discharge limits for a single unit with thermal power 3 000 MWt and clarified that the discharge control values for other power reactors should be appropriately adjusted. Currently, various types of reactors, technologies, standards, and multiple countries import coexist in China, resulting in a significant difference in the thermal power of nuclear power units. How to determine their discharge limits has become a focus for the environmental radiation protection management of NPPs. This paper collects data on the design and approval of effluent discharge in domestic nuclear power plants, as well as domestic and foreign data on effluent discharge, design power, and electricity generation, and conducts the correlation analysis. This paper proposes methods and suggestions for adjusting the discharge control values according to unit power, providing a reference for the standardized management of effluent discharge for NPPs.

Key words: nuclear power plant, effluent, discharge control value, correlation analysis