URANIUM INTERNAL CONTAMINATION STUDIES - BIODISTRIBUTION, RETENTION AND ELIMINATION

Using the U fission track micromapping technique, the uranium biodistr ibution, retention and elimination for four Wistar-London breed rats s imultaneously contaminated with U entering via nose were investigated. At different durations after contamination, the rats were sacrified: one of them immediately and the others in a day, 9 days and 36 days, r espectively. Their vital parts, in soft tissue and calcined states, as well as their calcined evacuations which were sampled every 24 hours were analysed by the fission track method. Using the optical microscop y, the obtained U track micromappings were studied in order to determi ne both the U contents and distributions in the analysed samples. The U contents determinations in the analysed organs and evacuations are g iven in the paper.