Assessment of tritium distribution and public exposure around Hanbit Nuclear Power Plant

This study evaluated the environmental distribution of tritium ( 3 H) around the Hanbit Nuclear Power Plant (NPP) and its additional impact on naturally occurring tritium. Tritium concentrations in air, drinking water, and urine were measured using a liquid scintillation counter (LSC) and analyzed in relation to meteorological conditions. Results showed spatial variations by distance and wind direction, with relatively higher concentrations in downwind regions. Significant correlations were observed among air, drinking water, and urine (r = 0.68), supporting the transfer of tritium across environmental media. The maximum annual effective dose was estimated at 1.16×10 -3 mSv/year, well below the public dose limit of 1 mSv/year, indicating negligible health risks. These findings provide scientific evidence for continuous monitoring and a basis for radiation safety management.