Abstract: The concept of passiveness,which has been generally used in the third-generation nuclear power technology AP1000,makes a great innovation in the design of the security systems,and the safety and economy have been greatly enhanced.However,this concept is used not only in safety systems,but also in the design of non-safety systems.Through the detailed introduction of the Gaseous Radwaste System,and the contrast with the traditional pressurized water reactors,it could be seen that the use of passiveness makes great innovation compared with tranditional technology.The operation does not depend on the active components,and the treatment of gaseous radwaste has been greatly improved from compress-store-decay to adsorb-decay by activated carbon.This innovation simplifies the process and improves the safety of operation.