Pellet화를 적용한 처분부적합 방사성폐기물 고화공정 최적화 연구

Abstract

The disposal-incongruent radioactive wastes generated from the operation or decommissioning of NPPs must be treated, solidified and packaged prior to disposal. These wastes are typically exemplified by particulates of radioactive wastes with dispersion characteristics. These wastes include the dried powders of concentrated, slurry, sludge, various powdered wastes generated in the decommissioning process (crushed concrete, decontamination sludge, etc.), and fine radioactive soil which is hard to decontaminate. As these particulate wastes must be packaged so that they become non-dispersive, they are solidified with solidification agents such as cement, asphalt and polymer. If they are treated using the existing solidification methods, however, the volume of the final wastes will increase. This drawback may increase the disposal cost and not meet the acceptability of disposal sites. Accordingly, for solving these problems, this study investigates the pelletization of particulate radioactive wastes and their solidificaion with polmer in order to reduce final waste volume.