Studies on the realism of radioecological models

The basis for the tests was provided by the experimental data published on the air transport of radioactive iodine and by the measurement data on the concentration of I-131 in the air, in pastoral vegetation and in milk from April 26 to the end of June 1986, as a consequence of the Chernobyl reactor accident for the Federal Republic of Germany. The transition from air to pastoral vegetation, from pastoral vegetation to milk and from air to milk was calculated. Besides the direct determination of these values from the measurement results, the transition factors were also derived from the data for the individual parameters fall-out rate, vegetation density, vegetation half-life, the transfer factor fodder/milk, and fodder quantity for cows. The data used for the analyses include results of investigations conducted after nuclear weapons tests and following emissions of radioactive iodine from nuclear power stations and reprocessing plants, as well as the data obtained in the framework of the program for Controlled Environmental Radioiodine Tests (CERT program). (orig./HP)