The aim of the paper is current status of the treatment and volume reduction for metallic waste generated from decommissioning project. In Korea, two decommissioning projects have been carried out owing to the retiring of nuclear research facilities (KRR-1 & KRR-2) and a uranium conversion plant (UCP). More than 400 tons of radioactive metal waste was generated during the decommissioning project. For the purpose of the volume reduction and self-disposal, KAERI was selected melt decontamination technology using high frequency induction furnace with 350kg/batch. The decommissioning metal waste was melted for self-disposal and volume reduction by an induction furnace. Melt decontamination facilities and technology can be used for decontamination and volume reduction of wastes generated from other facilities in Korea.