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    Estimation of radiation dose and lifetime risk from gross alpha/beta radioactivity in drinking water in Şırnak city, Türkiye
    (SİVAS CUMHURİYET ÜNİVERSİTESİ, 2025) Damla, Nevzat; Yeşilkanat, Cafer Mert; Taşkın, Halim; Işık, Ümit; Tekin, Caner
    The research aimed to evaluate the radiological quality of drinking water in Şırnak city, Türkiye. A gas proportional α/β counter (Berthold, LB 770 model) was employed to quantify the gross α and β activities in a total of seven drinking water samples. The findings revealed that the average gross α and β activities were 27 mBq/L (range: 19-35 mBq/L) and 117 mBq/L (range: 24-534 mBq/L), respectively. The age-dependent annual effective dose (AED) resulting from the ingestion of drinking water in Şırnak was meticulously estimated. The calculated average total AED values (alpha+beta) were 9.5 μSv/y for infants, 22.1 μSv/y for children, and 46.2 μSv/y for adults. The average lifetime risk of radiation-induced cancer (LTR) for the population was found to be 1.7×10⁻⁴. Overall, the study concluded that the radiological parameters in Şırnak city's drinking water were within the permissible limits recommended by the World Health Organization (WHO). These findings provide significant assurance that the drinking water in the region is safe for consumption, concerning radiation exposure. Furthermore, the results imply that existing water treatment and monitoring systems are effective in maintaining radiation levels within safe limits. The study highlights the importance of regular testing and evaluation of water quality to protect public health.
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    Evaluation and analysis of the spatial distribution of radiation risks caused by radon in drinking water of Batman, Türkiye
    (Springer, 2022) Damla, Nevzat; Alp, Mehmet Suat; Yeşilkanat, Cafer Mert; Işık, Umut
    With the aim of assessing potential public impact, investigations on drinking water samples in Batman, located in the southeastern part of Turkey, were conductud by measuring radon concentrations. Radon concentrations were found to diverge in the range between 0.19 and 0.93 Bq.L?1 with an average value of 0.48 Bq.L?1 and a standart deviation of 0.16 Bq.L?1. The associated ingestion and inhalation annual effective doses were estimated to assess the health risk for different age-wise. The findings indicate that the attained values are below limits of WHO. The spatial distribution of radon was investigated in waters from the undisturbed areas and the interpolated radiological maps were created.
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    Mapping of indoor radon survey and dose estimations in health centres in Turkey
    (2017) Damla, Nevzat; Kara, Nevzat; Tel, Eyüp; Yeşilkanat, Cafer Mert
    Radon and its short-lived daughter products, leading to lung cancer, are the most significant contribution to the exposure of man to ionizing radiation from natural sources. Therefore, the present study aimed to assess indoor radon measurements in 39 rooms of 15 health centres in Osmaniye city, Turkey using CR-39 solid-state nuclear track detectors based on radon dosimeters. Indoor radon concentrations were found to change from 8 to 108 Bqm3 . The associated radiological parameters such as the annual effective dose and excess lifetime cancer risk were computed for staff/patient in the rooms surveyed. The mean annual effective dose and excess lifetime cancer risk values were estimated to be 0.29 mSv and 1.02 103 , respectively. The annual computed effective doses are lower than the suggested action level (3–10 mSvy1 ). Also, with ordinary Kriging method, by using R programing language and quantum geographic information system, indoor radon concentration, annual effective dose, and excess lifetime cancer risk interpolated values were recorded and mapped. The findings obtained in the current study concerning radon levels and their variations will provide baseline values for future research surveys.
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    Radiochemical characterization of mineral waters in the Eastern Black Sea Region, Turkey
    (Springer, 2011) Kobya, Yaşar; Damla, Nevzat; Çevik, Uğur; Kopya, Ali İhsan
    This study has evaluated the levels of natural radionuclides and chemical components of mineral waters in the Eastern Black Sea Region (Turkey). The mean activity concentrations of (226)Ra, (232)Th, (137)Cs, (40)K, gross alpha and gross beta were found as 129, 33, 28, 714, 125 and 170 mBq L (-aEuro parts per thousand 1), respectively. Due to consumption of mineral waters, the radiological impact of them on the inhabitants was calculated by taking the annual intake into account through ingestion of aforementioned radionuclides. The estimated effective doses from mineral water were found to be 13.20 mu Sv year (-aEuro parts per thousand 1) ((226)Ra), 2.74 mu Sv year (-aEuro parts per thousand 1) ((232)Th), 0.13 mu Sv year (-aEuro parts per thousand 1) ((137)Cs) and 1.62 mu Sv year (-aEuro parts per thousand 1) ((40)K). The overall contribution of these radionuclides to the committed effective dose from a year's consumption of mineral water in the region is therefore estimated to be only 17.69%, which is in concordance with the recommended WHO value (100 mu Sv year (-aEuro parts per thousand 1)). The chemical analysis results showed that these waters contain Na, Al, P, Cl, K, Ca, V, Mn, Fe, Ni, Cu and Zn elements. These values were evaluated and compared with the internationally verified values. This study provides important information for consumers and authorities because of their internal radiochemical exposure risk from mineral water intake.
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    Radiological health risk maps of drinking water in Diyarbakır city, Türkiye
    (Taylor and Francis Ltd., 2025) Damla, Nevzat; Yeşilkanat, Cafer Mert; Kaya, Recep; Taşkın, Halim; Işık, Ümit; Aldemir, Kamuran
    Quantifying Radon-222 (222Rn), gross alpha (α) and beta (β) emitting radionuclides in drinking water is crucial for assessing water quality and potential long-term impacts on human health. Therefore, the aim of this study is to investigate the radiological characteristics and the spatial distribution of drinking water samples from Diyarbakır province, Türkiye using the geostatistical approach. The measurements of 222Rn and gross α/β were scrutinized using a radon gas analyzer (AlphaGUARD PQ 2000 PRO) and a gas proportionate α/β counter (Berthold, LB 770 model). Spatial distribution maps were generated through the Ordinary Kriging method to visualize these parameters. The values of 222Rn, gross α and β activity in drinking water were established to be in the range of 258–1393 mBq L−1, 12–243 mBq L−1 and 32–380 mBq L−1, respectively. The associated averages of the total annual effective dose (AEDtotal) and total lifetime cancer risk (LCRtotal), of drinking water were estimated to be 59.56 μSv y−1 and 2.57E − 04, respectively. Although the average LCRtotal was below the WHO threshold (3.85E − 04), it remained above the United States Environmental Protection Agency (US EPA) limit (1E − 04). These outcomes highlight the need for ongoing monitoring and further investigation of local water supplies to safeguard public health.
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    Radiological maps in beach sands along some coastal regions of Turkey
    (Pergamon-Elsevier Science Ltd, 2016) Küçükkömeroğlu, Belgin; Karadeniz, Aykut; Damla, Nevzat; Yeşilkanat, Cafer Mert; Çevik, Uğur
    In the present research, the gamma-emitting radionuclides in beach sands along the coastal regions of the Ordu, Giresun and Trabzon provinces, Turkey have been determined. The natural and anthropogenic radionuclide concentrations of the samples have been measured employing a germanium (HPGe) detector with high resolution and purity. The activity for 238U, 232Th, 40K and 137Cs of the samples were found to vary in the range from below detection limit (BDL) to 65 Bq·kg?1 , from BDL to 28 Bq·kg?1 , from 9 to 1936 Bq·kg?1 and from BDL to 22 Bq·kg?1 , respectively. The activity concentrations were compared with those in the literature. The associated radiological hazard indices were estimated, and were compared to the internationally recommended values. The radiological map of beach sand in the surveyed area was imaged. The data presented in the study are crucial since they constitute a baseline for the radiological mapping of the region in the future
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    Spatial distribution modeling of radiometric analysis and radiation dose estimations in drinking water and soil samples from Siirt city in Türkiye
    (Taylor and Francis Ltd., 2023) Damla, Nevzat; Altun, Ahmet; Yeşilkanat, Cafer Mert; Taşkın, Halim; Kara, Ayhan; Işık, Ümit
    In this study, the spatial distribution model has been aimed to characterize the radiometric parameters in drinking water and soil samples of Siirt City in Türkiye using the geostatistical method. The gross α and β measurements in the water samples and radiometric measurements in the soil samples were performed using a gas proportional α/β counter (Berthold, LB 770 model) and a gamma spectroscopy system (HPGe-detector), respectively. The spatial distribution maps, covering the whole region using the ordinary kriging method, were created visually. The gross α and β activities in the water samples varied from 9 to 40 and from 21 to 252 mBq L−1. The corresponding arithmetic average of the annual effective dose of gross α and β of drinking water was estimated to be 5.3 and 52.3 μSv y−1, respectively. In soil samples, the arithmetic average values of 238U, 232Th, 40K, and 137Cs radionuclides were 17 ± 6, 20 ± 7, 445 ± 166, and 4 ± 6 Bq kg−1, respectively. The arithmetic average absorbed dose rate (D), annual effective dose (AED), and excess lifetime cancer risk (ELCR) values in soil samples were calculated as 38 nGy h−1, 0.05 mSv y−1, and 0.165 × 10−3, respectively, for soil samples. The radiometric parameters of the sample were lower than those of the guideline levels recommended in the literature. Furthermore, the interpolation maps were evaluated in terms of the soil structure of the region.