Geo-scientific evidence to support the I1 isolation function related to human actions, as part of the Safety and Feasibility Case 1 (SFC1)

In preparation of the safety and feasibility case 1 for the geological disposal of high-level and long-lived radioactive waste in Belgium, human actions in the Campine area are evaluated. The aim is to limit the likelihood of inadvertent human intrusion and, in case such an intrusion does occur, of limiting its possible consequences in terms of radiological and chemical impact on humans and the environment. A future repository should therefore be located deep enough to physically protect the repository from human actions (and vice versa). The thickness of the overlying rock mass is considered in the first part of this report. A future repository should also be located in a geological environment of limited economic interest, to reduce the likelihood of human actions and inadvertent human intrusion in particular. Therefore, the second part of this report is dedicated to natural resources in the Campine and associated human actions. Finally, the possible consequences of these human actions on a geological repository are evaluated. It is concluded that the major risk of inadvertent human intrusion is formed by a borehole penetrating the repository system.