(GRS 217) Radionuclide transport and retention in natural rock formations

Radioactive wastes pose a significant hazard potential to nature and man and thus require a long-term safe disposal. In the Federal Republic of Germany, the concept of radioactive waste disposal in repositories in different deep geological formations is
being pursued.
For the assessment of a potential repository site, the future behaviour of relevant geological formations is simulated by means of long-term safety models. These models are based on process assumptions which are to be verified specifically. Natural
analogues are a suitable instrument for it. According to the definition of the German “Natural Analogue Expert Group“, these are naturally occurring systems where physical and chemical processes take or took place over geological time scales as they are to
be expected in repository systems or their subsystems, near field, far field, biosphere.