Fatima BENRACHI, Ghania BOUHILA, Mourad RAMDHANE

Rhumel Nehrinin (Kuzeydoğu Cezayir) çökelti kümelerinde doğal radyonüklidlerin seviyeleri ve etkileri

Boumerzoug nehri tortusunda (Rhumel nehrinin ana kolu) doğal radyonüklidlerin aktivite konsantrasyonları, yüksek çözünürlüklü HPGe detektörü kullanılarak ölçülmüştür. Örneklerin aktivite konsantrasyonları, 226Ra için 16,66-+2,32 Bq/kg ile 43,48-+4,03 Bq/kg arasında olup ortalama değer 26,64 ± 1,33 Bq/kg , 232Th için 20,01-+1,98 Bq/kg ile 32,71-+3,85 Bq/kg arasında olup ortalama değer 25,95-+1,46 Bq/kg, son olarak 40K için 81,70-+33,59 Bq/kg ile 259,20-+38,80 Bq/kg arasında olup ortalama değeri 164,50-+11,30 Bq/kg’dir. Bu değerler radyasyon tehlikesi endekslerini tahmin etmek için kullanılmıştır. Bu tortuların kullanımına bağlı radyasyon riskini değerlendirmek için emilen doz ve yıllık etkili doz değerlendirilmiştir.

Levels and effects of natural radionuclides in sediment banks of Rhumel River (Northeast Algeria)

Activity concentrations of natural radionuclides in Boumerzoug River sediment (the maintributary of Rhumel river) have been measured using high resolution HPGe detector. The activityconcentrations of the samples were range from 16.66-+2.32 Bq/kg to 43.48-+4.03 Bq/kg with meanvalue of 26.64-+1.33 Bq/kg for 226Ra, 20.01-+1.98 Bq/kg to 32.71-+3.85 Bq/kg with the mean value25.951.46 Bq/kg for 232Th and 81.70-+33.59 Bq/kg to 259.20-+38.80 Bq/kg with the mean value164.50-+11.30 Bq/kg for 40K. These values were used to estimate the radiation hazard indices. Theabsorbed dose and annual effective dose were evaluated to assess the radiation risk due to the use ofthese sediments.

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