Erol KAM, Zeki Ünal YÜMÜN, Muttalip Ergün TURGAY, Zeynep ACAR, Arev ARTUN

Gebze (Kocaeli / Türkiye) Bölgesinde Maruz Kalınan Gama Doz Değerleri ve Kanser Riskinin Değerlendirilmesi

Bu çalışmada Kocaeli ili, özellikle Marmara Denizi’nin kuzeydoğu tarafı (Gebze ili ve çevresi) gama doz değerleri ile kanser riskdeğerleri araştırılmıştır. Açık havadaki radyoaktivite analizleri, İstanbul’a yakın olan bu bölge için gama doz hızı ölçümleri ilegerçekleştirilmiştir. Çalışma alanında 35 bölgede dış ortam gama doz oranları ölçülerek ortalama doz oranı elde etmek mümkünolmuştur. Daha sonra yıllık gama doz değerleri hesaplanmıştır. Ayrıca bu değerler kullanılarak kanser risk değerleri elde edilmiştir.Tüm bu değerler Dünya Referans değerleri (UNSCEAR) ile karşılaştırılmıştır. Analiz sonucunda ortalama gama doz hızı 23.90$nGyhr^{-1}$ , yıllık doz hızı ise 29.31 μSv. Yaşam boyu kanser risk değeri 1.02x$10^{−4}$ olarak hesaplanmıştır. Bu değerler, dünya çapında varolan benzer çalışmalarla karşılaştırılabilir. Sonuç olarak, Kocaeli için ortalama yıllık etkin doz değeri ve yaşam boyu kanser riskideğeri dünya ortalamasının altındadır. Bu çalışma, ileride yapılacak araştırmalar için referans olarak kullanılacağı gibi, ileride Kocaeliiçin farklı çalışmalarla karşılaştırılmasında faydalı olacaktır, örneğin bir nükleer kirlilikten sonra örneğin Karadeniz’den gelen reaktörsızıntısı gibi.

Exposed Gamma Doses in air and Assessment of Cancer Risk aroundGebze (Kocaeli/Turkey) Region

By this study, it is focused to assessment of inhalation quality for Kocaeli province especially Northeast side of Marmara Sea (Gebzecounty and its territory). In this case, radioactivity analysis in air was realized via air dose rate measurements around this region whichis so closed neighbor to big city Istanbul. By measuring of the outdoor gamma dose rates on 35 stations, it was possible to get theaverage dose rate. Then it was calculated to annual dose in air. Besides, cancer risk was determined for Kocaeli. All these values werecompared with the World’s references (UNSCEAR) and reported finally. It was measured the average dose rate as 23.90 $nGyhr^{-1}$ andannual dose was calculated to 29.31 μSv. This dose is required to excess lifetime cancer risk as 1.02x$10^{−4}$ . These values could becompared to the similar studies which existed around the world. Finally, the average annual effective dose equivalent and excesslifetime cancer risk for Kocaeli, are less than the world average. This study would be used to a reference for further investigations,besides it will be usefull to compare with different studies for Kocaeli which, will be evaluated in the future, for example after anuclear pollution, such as based on a reactor leakage comes from Black Sea region and neighbours, nuclear attacks, etc., too. Anotherbenefit would be made to enlarge to find this kind of studies in literature.

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[1] UNSCEAR., Report of the United Nations scientific committee on the effects of atomic radiation, sources, effects, and risks of ionizing radiation. United Nations Sales Publication, New York, 2008.
[2] M.Değerlier, G.KARAHAN, “Ph. D. Thesis: Annual Effective Dose of Natural Environmental Radioactivity Measurements for Adana region”. N.S. Institue- CU/ Adana. 2007.
[3] E. Kapdan, N. Altınsoy, G. Karahan & A. Yüksel, “Outdoor radioactivity and health risk assessment for capital city Ankara, Turkey”, Journal of Radioanalytical and Nuclear Chemistry, 318. 1033-1042, 2018.
[4] Y. Kobya, H. Taşkın, C. M. Yeşilkanat & U. Çevik, “Evaluation of Outdoor Gamma Dose Rate and Cancer Risk in Artvin Province, Turkey, Human and Ecological Risk Assessment: An International Journal, 21:8, 2077-2085, 2015.
[5] E. Kapdan, A. Varınlıoğlu & G. Karahan, “Outdoor Radioactivity and Health Risks in Balıkesir, Northwestern Turkey”, Radiation Protection Dosimetry, pp: 1-9, 2011.
[6] E. Kam, A. Bozkurt & R. Ilgar “A study of background radioactivity level for Canakkale, Turkey”. Environ Monit Assess, 168: 685–690, 2010.
[7] Z. Ü. Yümün, K. Bayrak, H. Aksoy & U. Ayseli, “A Study of Background Radioactivity Level for Edirne, Turkey”, Journal of Engineering Technology and Applied Sciences, 2018.
[8]M. E. Turgay, “Cancer Risk Determination for IDA villages by using Annual Gamma Doses in Air, around Edremit&Ayvacık Districts; Balıkesir&Çanakkale, TURKEY”, European Journal of Science and Technology No 15, pp. 433-439, 2019.
[9] G. Karahan & A. Bayülken, “Assessment of gamma dose rates around Istanbul (Turkey)”, Journal of Environmental Radioactivity, 47, 213-221, 2000.
[10] E. Kam & A. Bozkurt “Environmental radioactivity measurements in Kastamonu region of northearn Turkey”, Applied Radiation and Isotopes, 65, 440-444, 2007.
[11] A. Bozkurt, N. Yorulmaz, E. Kam, G. Karahan & A.E. Osmanlioglu, “Assessment of environmental radioactivity for Sanliurfa region of southeastern Turkey”, Radiat. Meas., 42, 1387-1391, 2007.
[12] N.Z. Ateş, K. Bayrak, M.E. Turgay & E. Kam, “Evaluation of Excess Lifetime Cancer Risk Caused by External Exposure due to Natural Radioactivity in Bolu, Turkey”, Sigma Journal of Engineering and Natural Sciences, 38 (2), 945-954, 2020.
[13] M. Ghiassi, S. M. Mortazavi & J. R., Cameron, “Very High Background Areas of Ramsar, Iran: Preliminary Biological Studies”, Health Physics, 82(1), 87-93, 2002.
[14] M.V.,Lic´ınio, A.C. Freitas, H. Evagelista, A. CostaGonçalves, M. Miranda & A.S. Alencar, “A high spatial resolution outdoor dose rate map of the Rio de Janeiro city, Brasil”, Risk Assessment and Urbanization Effects. J Environ Radioact 126, 32-9, 2013.
[15] M. A. Arnedo, J. G. Rubiano, H. Alonsa, A. Tejera, A. Gonzalez, J. Gonzalez, J.M. Gil, R. Rodriguez, P. Martel & J.P. Bolivar, “Mapping natural radioactivity of soils in the eastern Canary Islands, Spain”, Journal of Environmental Radioactivity, 166, 242-258, 2017.
[16] www.wikipedia.org. 2019.
[17] CED, Branch Management, 2011.
[18] http://www.pchemlabs.com/manuals/pdf/eberline-esp2- technical-manual.pdf.
[19] ICRP., ICRP Publication 103 recommendations of the ICRP: annals of the ICRP volume 37/2-4. International Commission on Radiological Protection. Pergamon Pres, 2007.
[20] RESA, Radiation Measurement Systems TAEK (online).
[21] E. Kam, Z. Ü. Yümün, M. Önce & G. Açıkgöz, “Gamma Dose Rate Values In The Kulakçayırı Natural Lake and The Vicinity (Arnavutköy, İstanbul). Journal of Engineering Technology and Applies Sciences, 1(1), 29-33, 2016.
[22] Z. Ü. Yümün, E. Kam & M. Önce, “Gamma Dose Values of Stratigraphic Units Surfaced in Behramkale (Çanakkale) Zeytinli (Edremit-Balıkesir) Section of Kaz Mountains”. Journal of the Turkish Chemical Society Section A: Chemistry, 7(1), 207-2014, 2019.
[23] O. Günay, “Determination of Natural Radioactivity and Radiological Effects in some Soil Samples in Beykozİstanbul”. European Journal of Science and Technology. 12, 2018.