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


Ates N. Z. , BAYRAK K., Turgay M. E. , KAM E.

SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES-SIGMA MUHENDISLIK VE FEN BILIMLERI DERGISI, vol.38, no.2, pp.945-954, 2020 (Journal Indexed in ESCI) identifier

  • Publication Type: Article / Article
  • Volume: 38 Issue: 2
  • Publication Date: 2020
  • Title of Journal : SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES-SIGMA MUHENDISLIK VE FEN BILIMLERI DERGISI
  • Page Numbers: pp.945-954
  • Keywords: Outdoor gamma dose rate, natural radioactivity, scintillation detector, AEDE, cancer risk, Bolu, ENVIRONMENTAL-RADIOACTIVITY, OUTDOOR RADIOACTIVITY, REGION, CITY

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 mu Sv and 0.95x10(-4), respectively. These values could be compared to other studies which existed in Turkey and also in the world.