In Korea, Starting with the permanent shutdown of Kori Unit1, decommissioning of commercial nuclear power plant is underway. Although various technologies are required to decommissioning a nuclear power plant, the most important technology is the characterization of radioactive waste. In particular, it is possible to establish an accurate decommissioning plan and estimate cost for radioactive waste through accurate characterization of reactor vessel (RV), reactor vessel internal (RVI) and bioshield, which are highly activated waste. In Slovakia’s V1 nuclear power plant, two units were shutdown in 2006 and 2008, respectively, and decommissioning license was approved in July 2011. Before approving the decommissioning license, the decommissioning database project was carried out from 2008 to 2011. At this time, radioactive evaluation was performed through sampling and radiological analysis of radioactive structures.

• Seokju Hwang(Central Research Institute, Korea Hydro & Nuclear Power Company Limited, 70, Yuseong-daero 1312beon-gil, Yuseong-gu, Daejeon) Corresponding author
• Young Hwan Hwang(Central Research Institute, Korea Hydro & Nuclear Power Company Limited, 70, Yuseong-daero 1312beon-gil, Yuseong-gu, Daejeon)
• Cheon-Woo Kim(Central Research Institute, Korea Hydro & Nuclear Power Company Limited, 70, Yuseong-daero 1312beon-gil, Yuseong-gu, Daejeon)