Study on the stability of the most radiologically hazardous nuclides in various forms of fuel release of Chernobyl accident

The results of studying the transition of radiologically hazardous nuclides containing in fuel fragments of the Chernobyl fallout to the soluble forms are presented. The effect of agents imitating biological media of the fuel fragments has been examined; the constants of dissolution of the uranium matrix are given. The constants of leaching have been determined from the experiments on layer-by-layer etching of soil samples. 2 refs.; 5 figs.; 7 tabs