Case Analysis of Applying the 4th Industrial Technology for Establishing Optimal Decommissioning Plan of Kori Unit 1 Reactor

This study analyzed domestic and foreign cases to derive the possibility of applying the 4th industrial technology to Kori Unit 1 Dismantling and Decommissioning process. 3D VR is a technology that realizes virtual reality that does not exist in reality. Examples include VRdose, which was introduced during the decommissioning of the Fugen nuclear power plant in Japan, and educational simulations for nuclear power plant operation in the LNPP nuclear power plant in Russia. The IOT is a technique for remotely transmitting and receiving data by connecting devices through a network. It is also actively used for predictive maintenance of core facilities of thermal power plants in Korea. An intelligent robot is a robot that moves and recognizes like a human. In the high-radiation area, intelligent robots can replace human. Various kinds of robots were used in the process of accident investigations and decommissioning at Three Mile Island, Chernobyl and Fukushima Nuclear power plants. There are currently two major limitations to the dismantling and decommissioning of nuclear power plants. First, there is a lack of attempts to apply new technologies due to social and technical problems. The technologies used in nuclear decommissioning are still labor intensive. Considering the fact that there will be more power plants that need to be dismantled in the future, at the beginning stage, we should make efforts to develop and invest in advanced technologies. To achieve safe and economical nuclear decommissioning methods, It is surely required national level of cooperation. Second, the standards and regulations for the application of new technologies are not clear. For the application of new technologies, consideration should be given to the impact of decommissioning power stations' digital systems and the adaption of wireless communication networks. However, clear regulations have not been developed for this part yet. Depending on the progress of the process, it is necessary to develop regulatory guidelines that can be applied step by step in consideration of the cyber security impact of the use of digital devices and the application of wireless communication networks. There are not many used cases of new technologies in worldwide decommissioning. However from the perspective of the ALARA principle, which is the core goal of the nuclear power plant decommissioning project, the creation of safety and economics through the application of the fourth industrial technology must be and ongoing part. This study in meaningful in that it has comprehensively reviewed domestic and international cases and suggested the limitations and solutions for the dismantling of Kori Unit 1. As the application and utilization of the relevant fields are being gradually performed in Korea, It is necessary to pay attention to the development of phosphorus technology for the successful implementation of the decommissioning project