Radionuklidtransport im Boden

The work presented deals with the transport of radio-nuclides insoil. Following an overall description of the problem of radio-nuclide transport, a new migration model is developed by which the time and space dependency of the radio-nuclide concentration profile in a ground water layer can be calculated. In the second part of the work various release paths from an underground reactor plant are examined with the help of this model. The soil surrounding the reactor building acts as an extra safety barrier and reduces the effects from hypothetical accidents occuring within the plant. Another part of the work deals with a particular aspect of waste storage, in which the leaching of radio-nuclides from glass blocks by the ingress of water and transport by a water stream is considered. Release calculations of the critical plutonium nuclides confirm the low risk of atomic waste storage in geologically stable salt formations. The final application deals with the possible contamination risk to drinking water supplies from a well neighbouring a river following a release of activity in the discharge water from an upstream reactor plan . The results showthat because of the short contact time of the contamination front in the flowing river water and the large reduction by adsorption in the transport path between the river and the well, there is no immediate risk from such an accident