Our study shows a one-year-long, monthly integrated continuous monitoring campaign of gaseous radiocarbon emission and ambient air compared with 4 event-like, weekly (168 h) atmospheric aerosol radiocarbon data in every season of 2019, at 4 locations (n = 16 aerosol sample) around the Paks Nuclear Power Plant, Hungary. The study shows the first aerosol radiocarbon results around a nuclear power plant measured by accelerator mass spectrometry in Hungary. There was no dominant contribution detected in the atmospheric CO₂ gas fraction, but we could detect excess radiocarbon in the total gaseous carbon fraction at almost every sampling point around the Paks Nuclear Power Plant. The highest Δ¹⁴C value in the total gaseous carbon form was 157.9 ± 4.6‰ in November and the highest Δ ¹⁴C value in the CO₂ fraction was 86.1 ± 4.0‰ in December during 2019. Observed ¹⁴C activity excess is not higher than previously published values around the Paks Nuclear Power plant at the same sampling points (Molnár et al., 2007; Varga et al., 2020). Our aerosol radiocarbon measurements show that there is no significant contribution from the nuclear power plant to the atmospheric PM₁₀ fraction. We could not detect a Δ ¹⁴C value higher than 0‰ in any season. The results show that the simple aerosol sampling, without pre-treatment of the filters, is appropriate for the measurement of excess radiocarbon at the vicinity of nuclear power plants. The applied preparation and measurement method can be applicable for detection of hot (¹⁴C) particles and early identification of radiocarbon emission from nuclear power plants in the PM₁₀ fraction.

我们的研究显示，与 2019 年每个季节在 4 个地点（n = 16 气溶胶样本）在匈牙利帕克斯核电站周围。该研究显示了匈牙利通过加速器质谱法测量的核电站周围的第一个气溶胶放射性碳结果。在大气 CO ₂气体部分中没有检测到主要贡献，但我们几乎可以在 Paks 核电站周围的每个采样点检测到总气态碳部分中过量的放射性碳。11月总气态碳最高Δ ¹⁴ C值为157.9±4.6‰，最高Δ2019 年 12 月，CO ₂馏分中的¹⁴ C 值为86.1 ± 4.0‰。观察到的¹⁴ C 活性过剩不高于先前在相同采样点 Paks 核电站周围公布的值（Molnár 等人，2007 年；Varga等人，2020 年）。我们的气溶胶放射性碳测量表明，核电站对大气 PM ₁₀分数没有显着贡献。我们无法检测到 Δ ¹⁴任何季节C值均高于0‰。结果表明，未经过滤器预处理的简单气溶胶采样适用于核电厂附近过量放射性碳的测量。所应用的制备和测量方法可适用于检测热 ( ¹⁴ C) 粒子和早期识别核电厂 PM ₁₀馏分中的放射性碳排放。