1. Application of Mass-to-surface Ratio for Regulatory Clearance of VLLW Metal Radwastes at KAERI
The nuclear facilities at Korea Atomic Energy Research Institute (KAERI) have generated a variety of metal radwastes with extremely low radioactivity. Metal radwastes such as dismantled hot cell equipment were cleared in In the case of dismantled hot cell equipment, the analysis results were recorded with unit of [activity/area]. So, [activity/area] must be transformed into [activity/mass]. This can be achieved by applying the mass-to-surface ratio provided by USNRC. And, it was conservative approach to applying averaged mass-to-surface ratio of a ferrous metal (4.53 g/cm2) to dismantled hot cell equipment. After a series of processes, all of them were recycled by committed disposal.