Environmental Gamma Radiation Measurement, Dose Rate and Lifetime Cancer Risk Assessment in Malatya Province and its Districts

Year 2022, Volume: 12 Issue: 2, 634 - 644, 15.12.2022

Halime Kayakökü

https://doi.org/10.31466/kfbd.1091391

Abstract

In this study, gama dose rate measurements were made at 15 different points in Malatya. Measurements were taken at each point both on the ground and at a height of 1 m above the ground. Gamma dose rate measurements were made using a portable scintillation counter with a NaI (Tl) crystal. In addition to gamma dose rates (DR), annual effective dose rates (YEDO) and lifetime cancer risk (ÖBKR) values were also calculated. The mean values obtained for DR, YEDO and ÖBKR at 1 m above the ground were calculated as 48.47 nGy/h, 58.18 µSv/y and 0.2110-3, respectively. The results presented in this study were compared with the results of similar studies conducted in different regions of Turkey and the world average values given by UNSCEAR.

Keywords

Scintillation counter, Gamma dose rate, Annual effective dose, Cancer risk

Malatya İli ve İlçelerinde Çevresel Gama Radyasyonunun Ölçümü, Doz Hızı ve Ömür Boyu Kanser Riski Değerlendirmesi

Abstract

Bu çalışmada, Malatya ilinde, 15 farklı noktada, gama doz hızı ölçümleri yapılmıştır. Ölçümler, her noktada hem yerde hem de yerden 1 m yükseklikte alınmıştır. Gama doz hızı ölçümleri NaI (Tl) kristaline sahip taşınabilir bir sintilasyon sayacı kullanılarak yapılmıştır. Gama doz hızlarına (DR) ek olarak, yıllık etkin doz oranları (YEDO) ve ömür boyu kanser riski (ÖBKR) değerleri de hesaplanmıştır. Yerden 1 m yükseklikte DR, YEDO ve ÖBKR için elde edilen ortalama değerler, sırasıyla, 48,47 nGy/h, 58,18 µSv/y ve 0,2110-3 olarak hesaplanmıştır. Bu çalışmada sunulan sonuçlar, Türkiye’nin farklı bölgelerinde yapılan benzer çalışmaların sonuçları ve UNSCEAR tarafından verilen dünya ortalama değerleri ile karşılaştırılmıştır.

Keywords

Sintilasyon sayacı, Gama doz hızı, Yıllık etkin doz, Kanser riski

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