The discipline is devoted to the study of radioecological monitoring as a basis for mastering subsequent technological courses included in the professional cycle. A wide range of issues are discussed , Embracing the Physical Foundations of Radiochemistry , physico-chemical features of the behavior of natural and man-made systems , in which radionuclides are present, analyzes the effect of ionizing radiation as the most important natural and man-made environmental factor. The course develops practical skills of working with sources of ionizing radiation and radioactive substances in open form. A feature of the study of the discipline is a unified approach to the consideration and analysis of processes , which take place with the participation of radionuclides in natural and man-made systems , large amount of practical work with open sources of ionizing radiation in accordance with the norms and rules of safe organization of work .