Levels of radioactive pollution of lower waters of the Shornobyl nuclear power plant and means of limitation of its distribution - M. I. Panasiuk; D. T. Matrosov; Ye. I. Petrosenko; H. V. Levin; P. A. Liushnia; M. O. Sizov; L. A. Palamar; I. P. Onyshchenko (Problems of nuclear power plants safety and of Chornobyl, 2018)