Modelling of radioactive material release from waste packages in case of a fire event

Assumed incidents in the operational phase of the planned German repository Konrad for radioactive waste with negligible heat production were investigated in order to assess their possible radiological consequences. Release fractions of the radioactive substances contained in waste packages were assessed from experimental data obtained under thermal impact. They are given for halogens, tritium, `4C and other radionuclides and are classified according to the waste form groups and waste container classes.