EVALUATION OF EXCESS LIFETIME CANCER RISK CAUSED BY EXTERNAL EXPOSURE DUE TO NATURAL RADIOACTIVITY IN BOLU, TURKEY

Year 2020, Volume: 38 Issue: 2, 945 - 954, 01.06.2021

Naz Zeynep Ateş Kübra Bayrak M. Ergun Turgay Erol Kam

Abstract

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.

Keywords

Outdoor gamma dose rate, natural radioactivity, scintillation detector, AEDE, cancer risk, Bolu

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