Preliminary study on optimization of disposal facilities against human intrusion

It is the preferred option to contain the radwaste and isolate it from the human environment for a long-term management of the radwaste. The concentration and containment of the waste in one location, however, could make future generation be in hazard condition if someone were to disturb the disposed waste. In this study, protective measures to increase robustness of disposal facilities against human intrusion were proposed on the basis of methodology developed HIDRA project, with the assumption that the intrusion occurs after loss of knowledge of the hazardous nature of the disposal facility. Feasibility of implementation, economic cost, and conflict with safety function were considered when the potential measure was assessed qualitatively. As a result, installation of reinforced concrete over concrete silo was adopted as protective measure. In this paper, the protective measure was derived through simple qualitative consideration, but the implementer should submit comprehensive safety case for the derivation of protective measure against human intrusion to support their justice