Study of Containment Over-Pressure Fragility Curve and Analysis of Opening Pressure for Containment Filtration and Exhaust System

Based on the results of international researches and design feature of CPR1000 containment,the fragility curve for CPR1000 containment is studied.The operation pressure to put Containment Filtration and Exhaust System(EUF) into service is proposed.With different operation pressures,the radiological con-sequences has been compared.The results show that the pressure threshold for EUF operation can increase to 0.71MPa(g) and the starting time of the EUF is delayed about 1day and the accumulated activity to the envi-ronment is also decreased definitely.