Abstract

This study explains how to manufacture the equipment for removing radioactive wastes on the wires generated during the decommissioning process of nuclear facilities. The method involves spraying pressure treatment process to separate the aggregates from the wire; the latter of which contain the majority of the radioactive contaminants. The process acted to weaken the chemical bond between the wire and aggregate components on the wire. As a result of the decontamination test of the flat nozzle and the round nozzle, the decontamination area of the flat nozzle increased compared to the round nozzle, but the decontamination rate decreased. In the case of a round nozzle, the sprayed dry ice pellets collide with the surface of the wire and decontamination occurs almost simultaneously. On the other hand, in the case of a flat nozzle, it takes about 1 second or more to decontaminate one area. If the electric wire moves before one area is decontaminated, there is a possibility of deterioration of decontamination performance.

Keywords:Decommissioning waste; Pressure treatment; Flat nozzle; Round nozzle; Wire