EN
The kinetics of radioruthenium in rats after repeated contamination with small doses was investigated. Ruthenium-106 was poorly absorbed and rapidly eliminated from the organs and tissues of rats. No specific affinity of Ru-106 for any organ or tissue was observed except for the kidneys, where marked tendency for cumulating was found. It seems that radioruthenium is of less importance for the human and animal health in comparison with radiocaesium and radiostrontium.