Geophysics Department, Hanoi University of Mining and Geology, No 18, Vien Street, Bac Tu Liem District, Hanoi 100 000, Vietnam.
Institute of Radiochemistry and Radioecology, University of Pannonia, H-8200 Veszprem, Hungary.
Int J Environ Res Public Health. 2021 Jan 8;18(2):469. doi: 10.3390/ijerph18020469.
The determination of natural radionuclide concentrations plays an important role for assuring public health and in the estimation of the radiological hazards. This is especially true for high level radiation areas. In this study, Ra, Ra and U concentrations were measured in well waters surrounding eight of the high-level natural radiation areas in northern Vietnam. The Ra, Ra and U activity concentrations vary from <1.2 × 10-2.7 (0.46), <2.6 × 10-0.43 (0.07) and <38 × 10-5.32 Bq/L (0.50 of median), respectively. Ra and U isotopes in most areas are in equilibrium, except for the DT-Thai Nguyen area. The calculated radiological hazard indices are generally higher than WHO (World Health Organization) recommendations. Average annual effective dose and excess lifetime cancer risk values due to drinking well water range from to 130 to 540 μSv/year and 7.4 × 10 to 3.1 × 10, respectively.
测定天然放射性核素浓度对于保障公众健康和评估放射性危害至关重要。这在高辐射地区尤为如此。本研究测定了越南北部 8 个高天然辐射地区周围井水的 Ra、Ra 和 U 浓度。Ra、Ra 和 U 的活度浓度分别为 <1.2×10-2.7(0.46)、<2.6×10-0.43(0.07)和 <38×10-5.32 Bq/L(0.50 为中位数)。除了 DT-太原地区外，大多数地区的 Ra 和 U 同位素处于平衡状态。计算得出的辐射危害指数普遍高于世界卫生组织（World Health Organization）的建议。由于饮用井水，年平均有效剂量和超额终生癌症风险值范围分别为 130 至 540 μSv/年和 7.4×10 至 3.1×10。
