Ağlayankaya plaj kumlarında doğal radyoaktivite düzeylerinin ve radyolojik tehlike indekslerinin değerlendirilmesi

Öz

Bu çalışmada, Şile-İstanbul' da bulunan Ağlayankaya plajından toplanan kumların doğal radyoaktivite seviyelerini belirlemek için ²²⁶Ra, ²³²Th ve ⁴⁰K konsantrasyonları gama spektrometre sistemi ile ölçülmüştür. Kum numunelerindeki ²²⁶Ra, ²³²Th ve ⁴⁰K aktivite konsantrasyonları, sırasıyla 35.170, 31.637 ve 382.284 Bq / kg ortalamaları ile 27.368 ila 41.773, 22.147 ila 40.125 ve 293.667 ila 463.582 Bq / kg arasındadır. Ölçümler sonucunda elde edilen ²²⁶Ra, ²³²Th ve ⁴⁰K aktivite konsantrasyonları kullanılarak soğurulan gama doz hızı, yıllık etkin doz eşdeğeri, radyum eşdeğer aktivitesi, iç tehlike endeksi ve dış tehlike endeksi 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,kum,radyolojik tehlike indeksleri,ağlayankaya plajı

Assessments of natural radioactivity levels and radiological hazard indices in Ağlayankaya beach sands

Abstract

In this study, 226Ra, 232Th and 40K concentrations were measured by gamma spectrometry system to determine the natural radioactivity levels of sand collected from Aglayankaya beach in Şile-Istanbul. The activity concentrations of 226Ra, 232Th and 40K in the sand samples are between 27.368 and 41.773, 22.147 to 40.125 and 293.667 to 463.582 Bq / kg, respectively, with averages of 35.170, 31.637 and 382.284 Bq / kg. The absorbed dose rate, annual effective dose equivalent, radium equivalent activity, internal hazard index and external hazard index 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. 

Keywords

• Natural radioactivity,sand,radiological hazard indices,Aglayankaya beach

Kaynakça

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