Yapılarda kullanılan malzemelerden yayılan doğal radyasyonun araştırılmasına yönelik çalışmalar

Ali Aşkın, Murat Dal

Öz


Bu derlemede, çeşitli yapı malzemelerinde var olan 226Ra, 232Th, 40K radyoaktif izotoplarından yayılan gama radyasyonun aktivitesinin ve bu aktivitelere bağlı olan radyum eşdeğer aktivitesi, gama ve alfa indeksi, soğurulan gama doz oranı ile iç ve dış risk indeksleri gibi radyolojik parametrelerinin belirlenmesi amacıyla Türkiye’de ve diğer ülkelerde yapılmış araştırmalar ve sonuçları incelenerek okuyucuların dikkatine sunulmuştur. Yapılan çalışmaların genelinde granit ve kum örneklerindeki doğal radyoaktivite diğer malzemelere oranla daha yüksek bulunmuştur.  Aktivitesi yüksek bulunan bazı çimento örneklerinde, yüksek radyoaktivtenin kaynağının çimentoda katkı malzemesi olarak kullanılan kül’den kaynaklandığı belirtilmiştir. Bu konuda yapılan çalışmaların sayıları ve elde edilen sonuçlar değerlendirildiğinde, yapı malzemelerinden yayılan doğal radyoaktivitenin belirlenmesinin uzun vadede insan sağlığının korunmasına önemli katkıları olacağı görülmektedir.


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