Akkaya Gizem, Kahraman Ayşegül, Koray Abdullah, Kaynak Gökay
Physics Department, Faculty of Arts and Sciences, Uludag University, 16059 Bursa, Turkey.
J Radiol Prot. 2016 Sep;36(3):490-503. doi: 10.1088/0952-4746/36/3/490. Epub 2016 Jun 29.
Spring waters used as spas and their region may contain significant amounts of natural radionuclides. The main sources of exposure are the inhalation of radon and its decay products released from the water and soil and terrestrial gamma-radiation. In order to evaluate the potential risk of thermal regions in Bursa, located in the impact area of the NAF (North Anatolian Fault), radon and thoron concentrations in soil gas, radon concentrations in thermal waters and outdoor gamma radiation levels were measured in thermal regions that have different geological formations. The radon and thoron concentrations in soil-gas were found to vary from 2272 ± 121 to 245196 ± 3455 Bq m and from 999 ± 218 to 178 848 ± 17 742 Bq m, respectively. The radon concentrations in thermal waters ranged from 0.99 ± 0.21 to 226.74 ± 2.51 Bq l in the rainy season and from 0.26 ± 0.10 to 178.03 ± 12.86 Bq l in the dry season. The measured outdoor gamma radiation levels varied from 38 to 180 nGy h. The gamma dose rates were found to be strong positively correlating with the radon and thoron concentrations in soil-gas. The radon and outdoor gamma radiation levels were observed to be a function of the geological formations of the area.
用作温泉浴场的泉水及其所在区域可能含有大量天然放射性核素。主要暴露源是吸入水中和土壤释放的氡及其衰变产物以及陆地伽马辐射。为了评估位于北安纳托利亚断层影响区域内布尔萨热区的潜在风险，在具有不同地质构造的热区测量了土壤气体中的氡和钍射气浓度、温泉水中的氡浓度以及室外伽马辐射水平。发现土壤气体中的氡和钍射气浓度分别在2272±121至245196±3455贝克勒尔/立方米和999±218至178848±17742贝克勒尔/立方米之间变化。雨季温泉水中的氡浓度范围为0.99±0.21至226.74±2.51贝克勒尔/升，旱季为0.26±0.10至178.03±12.86贝克勒尔/升。测得的室外伽马辐射水平在38至180纳戈瑞/小时之间变化。发现伽马剂量率与土壤气体中的氡和钍射气浓度呈强正相关。观察到氡和室外伽马辐射水平是该地区地质构造的函数。
