Dismantling the Bio-shielding Concrete of the KRR-2

According to the KRR-1 and 2 decommissioning project, the KRR-2 bio-shielding concrete was dismantled. Total 1,913 tons of concrete, where both the activated and non-activated concrete dismantle was more than the estimation with a volume of 650 m3 from the size of 9.7 m (W) x 17.4 m (L) x 7.8 m (H). The density of the normal concrete was around 2.4 Ton/m3 and that the heavy concrete was around 3.0 - 3.2 Ton/m3. Before the main activities, the radiation was evaluated to create a boundary between the activated and non-activated concrete. For the dismantling, the technologies of a core boring, diamond wire sawing and hydraulic crushing were applied. During 6 months, a total of 1,964 mandays were consumed. Among the dismantled waste, only 13.2 % of the concrete waste was classified as radioactive waste which is temporally being stored in the KRR-2 reactor hall as 38 EA, 4m3 containers and 59 EA, 200 liter drums