Návrh radiační ochrany procesu výroby uranového koncentrátu při zpracování zbytkových technologických roztoků po chemické těžbě uranu v severočeské oblasti

Abstract

This master's thesis focuses on the optimization of radiation protection within the production process of uranium concentrate, which serves as a byproduct of the remediation of residual technological solutions after chemical uranium mining in the Northern Bohemian region (Stráž pod Ralskem). The theoretical part summarizes the physical principles of ionizing radiation, the legislative framework of radiation protection in the Czech Republic, and the specifics of natural radionuclides of the uranium-radium series. The practical part is directed towards the analysis and evaluation of the radiation situation at category III workplaces of the Stráž branch of the DIAMO, s. p. (state enterprise). The thesis identifies critical points in the technological flow (e.g., elution, precipitation, filtration, and drying) and, based on real monitoring data from the 2021–2025 period, performs optimization calculations for effective doses of workers and representative persons in the vicinity. The work also includes a revision of the analysis of radiation emergencies, which, based on conservative calculations, proposes the adjustment and simplification of current emergency action levels (EALs) and emergency response instruction. The result confirms that the existing radiation protection system is optimized and radiation limits are not exceeded.