Nuclear Seminar - Dominik Juračka (12.11.2025)
Wednesday 12.11.2025 at 14:00, Lecture room F1/364
RNDr. Dominik Juračka (Department of Nuclear Chemistry, Fakulty of Natural Sciences, Comenius University):
Validation and verification of carbon-14 determination method in samples from nuclear facilities
Abstract:
Carbon-14 is an activation product with a long half-life and is one of the radiochemicaly complicated and difficult to measure radionuclides due to the low energy of beta radiation (156.469 keV) and its presence in various chemical forms. When monitoring gaseous discharges from nuclear installations, C-14 activity in samples obtained by capturing gaseous chemical forms of carbon into NaOH solution is evaluated and balanced. The aim of the work was to optimize and validate a method for determining C-14 activity in liquid matrices of gaseous discharges using liquid scintillation spectrometry. The method was successfully verified in the interlaboratory comparative test "Environmental Radioactivity Proficiency Test Exercise 2021" at the Radiochemical Analysis Test Laboratory of KJCH Prif UK, which holds accreditation according to STN EN ISO/IEC 17025:2017. The application to real samples from the gaseous outlets of the nuclear power plant confirmed that the method meets all the requirements of the standard.