Training Manual . - SPb: SPbGUGA, 2006. - 113 s. Published in accordance with the discipline program "Physics" (section "Nuclear and nuclear physics") The manual can be used to train certified specialists studying in the direction of 160500 "Air Navigation", Volume 72 h, semester 4, 5 or 6. The phenomenon of radioactivity of the atomic nucleus and the properties of nuclear radiation, the interaction of radiation with matter, dosimetric values. are considered. Description of the Chernobyl disaster, its consequences and the impact of radiation on humans. The paper provides examples of problem solving. Annexes to the work contain tables of reference materials on the discipline, tasks for performing essays and a list of questions for preparation for offset. Designed for full-time and part-time students of OAB specialization, as well as other specializations in coordination with dean's departments . IL. 8, tab. 20, Bibl. 26.