Abstract: The ability of low-level radionuclide monitoring for nuclear power plant effluents guarantees the quality of radioactive discharge evaluation. By changing the conventional sampling and measuring methods of operating NPPs and experimental studies on the radioactivity level of NPP effluents and their detection limits, the existing problems in the country's effluent monitoring of NPPs are discussed in this paper. The author also analyzes the difference between the current data processing results of low-level radioactive nuclide in NPP effluents and the actual discharge measurement. The experimental results show that the actual level of low-level radionuclide effluent is far below its statistical discharge, which is indeed one of the possible contributing factors of higher statistical discharge of nuclear power plant in China. Suggestions on establishing regulatory requirements of effluent monitoring detection limits for a nuclear power plant and data processing approach for low level monitoring result are proposed lastly.

Key words: effluent of nuclear power plant, low level, radioactive nuclide, monitoring, detection limit, regulatory requirement