ENVIRONMENTAL RADIOACTIVITY MEASUREMENTS IN BARTIN PROVINCE, NORTH ANATOLIA REGION

Yıl 2019, Cilt 31, Sayı 1, 42 - 48, 26.06.2019

Gürsel KARAHAN Enis KAPDAN Nesli BİNGÖLDAĞ Berna ATAKSOR Halim TAŞKIN Nilgün ORHAN Recep BIYIK

Öz

The aim of this study is to determine the background radioactivity levels and assess the relevant health risks for Bartın province located north coast of Turkey. For this purpose the collected soil samples were analyzed by the method of gamma spectrometry, outdoor gamma dose rates were investigated by in-situ measurements and the collected drinking water samples were analyzed by proportional counter with gas flow. The average activity of radionuclides ²²⁶Ra, ²³²Th, ⁴⁰K, and ¹³⁷Cs in soil were determined as 20.2±7.3, 26.9±10.5, 445±175, 6.4±6.4 Bq kg^-1 respectively for Bartın province. The mean outdoor absorbed gamma dose rate was measured 1 m away from the ground as 56±15 nGy h^-1 for the region. The average gross alpha and beta activity for drinking water were found to be 0.039±0.048 and 0.135±0.403 Bq L^-1 respectively. The average annual effective dose value due to cosmic, terrestrial radiations and alpha-beta activity in water was calculated as 0.03±0.01, 0.04±0.01 and 0.02±0.03 mSv respectively for people living in the region. Spatial distribution map of each radiologic parameter plotted for the region is presented in the paper.

Anahtar Kelimeler

Bartın, cancer risk, radionuclide, gamma dose rate, gross alpha, gross beta, biological effective radiation dose

KUZEY ANADOLU BÖLGESİNDE BULUNAN BARTIN İLİNDE ÇEVRESEL RADYOAKTİVİTE ÖLÇÜMLERİ

Öz

Bu çalışmanın amacı, Türkiye'nin kuzey sahilindeki Bartın ili için fon radyoaktivite düzeylerini belirlemek ve ilgili sağlık risklerini değerlendirmektir. Bu amaçla toplanan toprak örnekleri gama spektrometresi yöntemi ile analiz edilmiş, dış ortamdaki gama doz oranları yerinde ölçümlerle araştırılmış ve toplanan içme suyu örnekleri gaz akışlı orantılı sayaç ile analiz edilmiştir. Topraktaki ²²⁶Ra, ²³²Th, ⁴⁰K ve ¹³⁷Cs radyonüklitlerinin ortalama aktivitesi, Bartın ili için sırasıyla 20.2 ± 7.3, 26.9 ± 10.5, 445 ± 175, 6.4 ± 6.4 Bq kg^-1 olarak belirlenmiştir. Bölge için ortalama yerden 1 m yükseklikte havada absorbe edilen gama doz hızı, 56 ± 15 nGy h^-1 olarak ölçülmüştür. İçme suyu için ortalama toplam alfa ve beta aktivitesi sırasıyla 0.039 ± 0.048 ve 0.135 ± 0.403 BqL^-1 olarak bulunmuştur. Bölgede yaşayanlar için kozmik, karasal radyasyonlar ve sudaki alfa-beta aktivitesine bağlı ortalama yıllık efektif doz değerleri, sırasıyla, 0.03 ± 0.01, 0.04 ± 0.01 ve 0.02 ± 0.03 mSv olarak hesaplanmıştır. Her bir radyolojik parametrenin bölge için çizilen dağılım haritası makalede sunulmaktadır.

Anahtar Kelimeler

Bartın, kanser riski, radyonüklid, gama doz hızı, toplam alfa, toplam beta, biyolojik etkin radyasyon dozu

Kaynakça

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