(GRS 237) Assessment of the long-term safety of repositories

The assessment of the long-term safety of a repository for radioactive or hazardous waste requires a comprehensive system understanding and capable and qualified numerical tools. All relevant processes which contribute to mobilisation and release ofcontaminants from the repository, transport through the host rock and adjacent rock formations as well as exposition in the biosphere have to be implemented in the programme package. The objective of the project “Scientific basis for the assessmentof the long-term safety of repositories”, identification number 02 E 9954, was to follow national and international developments in this area, to evaluate research projects, which contribute to knowledge, model approaches and data, and to perform specificinvestigations to improve the methodologies of the long-term safety assessment.