Source terms are derived for different scenarios of a potential final repository in the salt dome Gorleben, under the precondition that NaCl- or MgCl2-rich solutions are present. Kinetic and thermodynamic mobilization / retention and the influence of temperatures are discussed and the expected geochemical conditions are analyzed. Upper limit concentrations for the radionuclides Am, Th, U, Np, Pu, Tc, Zr and rare earth elements are derived for the simplified scenarios
