Final disposal of high-level and low- and intermediate-level radioactive waste at a same site Interactions, derived consequences and possible countermeasures

The possibility of final disposal of high-level and low- and intermediate-level radioactive waste at a common site is considered in the Site Selection Act (StandAG) as well as in the National Waste Management Programme (NaPro) and in the Final Disposal Safety Requirements Ordinance (EndlSiUntV). A concept for the final disposal of high-level radioactive waste and low- and intermediate-level radioactive waste at a common site is possible as an option under the condition that a counteracting negative influence by the inventories of the two neighbouring deep geological repositories can be excluded. The research project will present the key features of such a concept, which must be taken into account in the site selection procedure and the preliminary safety investigations to be carried out. Relevant interaction processes will be identified depending on the host rock and taking into account possible spatial constellations of the main components of a concept for the final disposal of high-level and low- and intermediate-level radioactive waste at a common site. On this basis, possible spatial configurations and requirements for both the design of the repository mines and the host rock properties are identified.