Evaluation of excess lifetime cancer risk caused by external exposure due to natural radioactivity in Bolu, Turkey

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Kam E., Ateş Z. N., Bayrak K., Turgay M. E.

Sigma Journal of Engineering and Natural Sciences, vol.38, no.2, pp.945-954, 2020 (ESCI)

  • Publication Type: Article / Article
  • Volume: 38 Issue: 2
  • Publication Date: 2020
  • Journal Name: Sigma Journal of Engineering and Natural Sciences
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Academic Search Premier, Directory of Open Access Journals
  • Page Numbers: pp.945-954
  • Yıldız Technical University Affiliated: Yes


In this study, the gamma dose rates in outdoor air at seventy-seven points around Bolu province were meausured using a counter (Eberline, ESP-2). Radiological hazards were evaluated by estimating the excess lifetime cancer risks caused by external exposure. The gamma dose rates measured varied from 11 to 68 nGyh-1with an average value of 22 nGy h-1 . The avarege value of the corresponding outdoor annual effective dose and the excess lifetime cancer risk was found as 27.23 μSv and 0.95x10−4, respectively. These values could be compared to other studies which existed in Turkey and also in the world.