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Radiation Protection Dosimetry Advance Access published online on September 18, 2009
Radiation Protection Dosimetry, doi:10.1093/rpd/ncp178
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© The Author 2009. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

A STUDY OF BACKGROUND RADIOACTIVITY LEVEL FOR TEKIRDAG, TURKEY

Erol Kam1, Yasemin Yarar2 and Ahmet Bozkurt3,*

1 TAEK, Cekmece Nuclear Research and Training Centre, Altinsehir Yolu, 5. km, Halkali, 34303 Istanbul, Turkey
2 Faculty of Arts and Sciences, Department of Physics, Yildiz Technical University, Esenler, 34210 Istanbul, Turkey
3 Faculty of Arts and Sciences, Department of Physics, Harran University, 63300 Sanliurfa, Turkey.

* Corresponding author: bozkurt{at}harran.edu.tr

Received May 19, 2009, amended August 13, 2009, accepted August 25, 2009

The level of background radiation for Tekirdag province of north-western Turkey was assessed in this study. Radon concentrations in indoor air were determined using CR-39 nuclear track detectors and the average 222Rn activity was found to be 86 Bq m–3 (equivalent to an annual effective dose of 2.2 mSv). Measurements of gamma doses in air were performed using plastic scintillators and the average absorbed gamma dose rates for indoor and outdoor were found to be 5.7 and 5 µR h–1, respectively, corresponding to an annual effective dose of 300 µSv. The radionuclide activity concentrations in soil samples collected from the study area were measured through gamma-ray spectrometry and the average activities were determined as 29, 39 and 580 Bq kg–1 for the natural radionuclides 238U, 232Th and 40K, respectively, and 5.2 Bq kg–1 for the fission product 137Cs. The natural radioactivity sources resulted in an annual effective dose of 75 µSv. The radioactivity levels of drinking water samples were measured as 0.044 and 0.1 Bq l–1 for gross alpha and gross beta activities using a low-background counting technique (equivalent to an annual effective dose of 9 µSv). The results of this study showed that the region's background radioactivity level is in agreement with most Turkish cities.


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