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, cilt.38, sa.2, ss.945-954, 2020 (ESCI İndekslerine Giren Dergi)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38 Konu: 2
  • Basım Tarihi: 2020
  • Dergi Adı: Sigma Journal of Engineering and Natural Sciences
  • Sayfa Sayıları: ss.945-954


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.