Abstract The radioactivity levels in soil samples of Bolu province of north-western Turkey have been determined. There has been no information about radioactivity measurement reported in soil samples in Bolu province so far. For this reason, the activity concentrations of natural and artificial radionuclides (226Ra, 232Th, 40K, and 137Cs) were measured in soil samples collected from 40 different points in Bolu province of north-western Turkey using gamma spectrometry technique with a high-purity germanium detector. The average activity concentrations (range) of 226Ra, 232Th, 40K, and 137Cs were found to be 18.2 (3.8–49.9) Bq/kg, 17.3 (4.1–37.9) Bq/kg, 258.3 (64.6–518.9) Bq/kg, and 7.5 (0.6–43.6) Bq/kg, respectively. At the end of the analysis, the radioactivity values were lower than the world average values reported by United Nations Scientific Committee on Effects of Atomic Radiation (UNSCEAR). In order to evaluate the radiological hazards resulting from natural radioactivity, radium equivalent activity (Raeq), gamma index (Iγ), external hazard index (Hex), absorbed dose rate in air (D), annual gonadal dose rate (AGDE), the annual effective dose rate (AEDE), and excess life time cancer risk (ELCR) were calculated and found in the range of 14.8–129.8 Bq/kg, 0.1–0.5, 0.0–0.4, 7.0–60.2 nGy/h, 49.8–417.5 µSv/y, 8.6–73.8 µSv/y, and 0.3 × 10−4 to 2.6 × 10−4, respectively. These results were compared with recommended values (370 Bq/kg for Raeq, <1 for Iγ, <1 for Hex, 55 nGy/h for D, 300 µSv/y for AGDE, 70 µSv/y for AEDE, and 2.9 × 10−4 for ELCR) by European Commission (EC), UNSCEAR and International Commission on Radiological Protection (ICRP). As a result, health hazards originated by natural radiation from soil samples of the Bolu province is low and insignificant.

中文翻译：

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土耳其博卢省土壤放射性和放射性危害评估

摘要 确定了土耳其西北部博卢省土壤样品的放射性水平。到目前为止，还没有关于博卢省土壤样品中放射性测量的信息报告。为此，在土耳其西北部博卢省 40 个不同地点采集的土壤样品中，使用伽马能谱技术和高纯锗测量了天然和人工放射性核素（226Ra、232Th、40K 和 137Cs）的活度浓度探测器。发现 226Ra、232Th、40K 和 137Cs 的平均活性浓度（范围）为 18.2 (3.8–49.9) Bq/kg、17.3 (4.1–37.9) Bq/kg、258.3 (64.6–518.9) Bq/kg和 7.5 (0.6–43.6) Bq/kg，分别。在分析结束时，放射性值低于联合国原子辐射效应科学委员会（UNSCEAR）报告的世界平均值。为了评估天然放射性、镭当量活度 (Raeq)、伽马指数 (Iγ)、外部危险指数 (Hex)、空气中吸收剂量率 (D)、年性腺剂量率 (AGDE) 造成的放射危害，计算年有效剂量率 (AEDE) 和超期癌症风险 (ELCR)，发现范围为 14.8–129.8 Bq/kg、0.1–0.5、0.0–0.4、7.0–60.2 nGy/h、49.8–417.5 µSv/y、8.6–73.8 µSv/y 和 0.3 × 10−4 至 2.6 × 10−4。将这些结果与推荐值进行比较（Raeq 为 370 Bq/kg，Iγ <1，Hex <1，D 为 55 nGy/h，AGDE 为 300 µSv/y，AEDE 为 70 µSv/y，以及 2.9 × 10 -4 为 ELCR) 由欧洲委员会 (EC)，UNSCEAR 和国际放射防护委员会 (ICRP)。因此，博卢省土壤样本的自然辐射引起的健康危害较低且不显着。