Analýza dopadů těžké havárie s únikem RA látek na okolí JE Dukovany.

Abstract

The submitted master thesis deals with the analysis of possible impacts of a model severe accident involving a release of radioactive substances on the surroundings of the Dukovany Nuclear Power Plant. The theoretical part describes the basic principles of nuclear safety, selected historical nuclear accidents, the phenomenology of severe accidents, and systems important for the prevention and mitigation of their consequences. Attention is also paid to the technical arrangement of the Dukovany Nuclear Power Plant, emergency planning, and methods used for assessing the impact of radioactive releases. The practical part focuses on a model severe accident scenario involving the release of selected radionuclides, namely ¹³⁵Xe, ¹³¹I and ¹³⁷Cs. The HYSPLIT model was used to calculate atmospheric dispersion and deposition, and its outputs were subsequently applied for an indicative assessment of effective doses using the SRS 19 methodology. The results are evaluated for the locations of Hrotovice, Třebíč and Jihlava over time intervals of 24 and 72 hours. The thesis compares radiological impacts among the individual locations and radionuclides, evaluates the significance of short-term iodine exposure and the longer-term effect of caesium deposition.