Assessment of radiological hazards and lifetime cancer risk in some marble samples from the Marmara Region

Yıl 2018, Cilt: 20 Sayı: 3, 62 - 74, 29.10.2018

Kadir Günoğlu

https://doi.org/10.25092/baunfbed.476604

Öz

In
this study, ²²⁶Ra, ²³²Th and ⁴⁰K
concentrations were measured by gamma spectrometry system to determine the
natural radioactivity levels in some marbles mining from the Marmara Region.  Mean activity concentrations of ²²⁶Ra,
²³²Th and ⁴⁰K  in
marble samples were measured as 37.446, 34.593 and 248.041 Bq / kg,
respectively.  The absorbed dose rate (D),
annual effective dose equivalent(YEDE), radium equivalent activity (Ra_eq),
internal hazard index (Hi) and external hazard index (Hd) values were
calculated using the ²²⁶Ra, ²³²Th, ⁴⁰K activity
concentrations obtained as a result of the measurements.  In addition, lifetime cancer risk (LCR), which
is a consequence of radiation exposure, has been calculated. All the results
obtained are compared with the limit values recommended by international
organizations.  According to these
results, it can be concluded that there is no harm in terms of both
radiological damage indices and dose parameters.

Anahtar Kelimeler

Natural radioactivity, radiological hazard, lifetime cancer risk, marble

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

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 (Ra_eq), 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.

Anahtar Kelimeler

Doğal radyoaktivite, radyolojik tehlike, yaşam boyu kanser riski, mermer

Kaynakça

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