Optimization study on the design objective of public radiation dose for HPR1000 nuclear power plants

An optimization study of design objective of public dose for new-built NPPs is described based on the design and actual release source terms of the new-built third generation HPR1000 PWRs in China at operational state, in consideration of the release characteristics of reactors and various environmental and meteorological conditions at coastal and inland sites. The results show that the optimum design objective of public doses achieved by HPR1000 for coastal site conditions is comparable to that set out by regulatory bodies of Europe and USA. Due to different environmental conditions, the optimization design objective for inland sites should be further studied based on the optimization of radioactive waste management system. For tritium and C-14 release source terms, more operational feedback data should be collected and analyzed to make the environmental impact assessment results more acceptable. Moreover, suggestions on release source terms follow-up and assessment methodology of HPR1000 are put forward. They will play an active role in enhancing the environmental friendliness and advancement of HPR1000. (authors)