For nuclear safety and nuclear emergency

the source term analysis of nuclear motor group. ORIGEN2 software developed by Oak Ridge National Laboratory is used to calculate the hazards of radioactive nuclides inhalation and ingestion in Daya Bay Commercial Pressurized Water Reactor Nuclear Power Station. The source term of the possible leakage of the leakage from M310 is analyzed by ORIGEN2 software

and the hazards of radioactive inhalation and ingestion are calculated.The results show that the concentrations of238 Pu

239 Pu and242 Cm in air increase with time. Among them

the change trend of239 Pu nuclide concentration is the slowest

and the change trend of239 Pu nuclide concentration tends to be stable with the increase of operation time. The concentration of actinides in air is much higher than that in water.