Marmara Bölgesi'ndeki bazı mermer örneklerinde radyolojik tehlikelerin ve yaşam boyu kanser riskinin değerlendirilmesi

Kadir Günoğlu

Öz


Bu çalışmada, Marmara Bölgesi’ nden çıkarılan bazı mermerlerdeki doğal radyoaktivite seviyelerini belirlemek için 226Ra, 232Th ve 40K konsantrasyonları gama spektrometre sistemi ile ölçülmüştür.  Mermer numunelerindeki 226Ra, 232Th ve 40K ortalama aktivite konsantrasyonları, sırasıyla 37.446, 34.593 ve 248.041 Bq / kg olarak ölçülmüştür.  Ölçümler sonucunda elde edilen 226Ra, 232Th, 40K aktivite konsantrasyonları kullanılarak soğurulan gama doz hızı (D), yıllık etkin doz eşdeğeri (YEDE), radyum eşdeğer aktivitesi (Raeq), iç tehlike endeksi (Hi) ve dış tehlike endeksi (Hd) değerleri hesaplanmıştır.  Bunların yanı sıra, radyasyon maruziyetinin bir sonucu olan yaşam boyu kanser riski (LCR) hesaplanmıştır.  Elde edilen tüm sonuçlar uluslararası kuruluşlar tarafından önerilen limit değerler ile karşılaştırılmıştır.  Bu sonuçlara göre, hem radyolojik zarar indeksleri açısından hem de doz parametreleri açısından hiç bir zarar teşkil etmediği sonucuna varılabilir.


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