Decontamination is one of the crucial technologies that are applied during the
decommissioning process of nuclear facilities to secure the safety of workers and to
minimize the quantity of radioactive waste. Decontamination removes radionuclides on
the surface of contaminated metal. Compared with decontamination for operational
nuclear facilities, decontamination for nuclear power plants that are being
decommissioned needs to remove the more and thicker surface using more aggressive
agents or specially developed equipment. In this study, we analyzed the status on
decontamination technology for NPP decommissioning.