Dynamics of physico-chemical forms of radionuclides in the bottom sediments of cooling pond of the ChNPP after their drying: 1. Model experiment - V. P. Protsak; O. O. Odintsov; Yu. V. Khomutinin; M. A. Zhurba; N. M. Prokopchuk; V. O. Kashparov (Nuclear physics and atomic energy, 2017)