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Assessment of natural radioactivity and its radiological hazards indices in several cement brands in Senegal

This study is aimed to establish a baseline data of activity concentrations of 226Ra, 232Th and 40K and to evaluate the radiological hazard indices in cements used as a building material in Senegal. In order to evaluate the activity concentrations of 226Ra, 232Th and 40K, the cement samples have been analyzed using BeGe gamma-ray detectors with low-background gamma-rays spectrometry setup. The self-attenuation was taking into account in bulk samples using a transmission bench. The activity concentration of 226Ra, 232Th and 40K of cement samples range from 7.09 to 150.25, 3.71 to 16.71 48.67 to 133.89, respectively. The radiation hazard indices such as radium equivalent activity (Raeq), absorbed dose (D), annual effective dose equivalent (AEDE), annual gonadal dose equivalent (AGDE), external hazard (Hex), internal hazard (Hin), gamma index (I?), alpha index (I?) and excess lifetime risk cancer were assessed and varied from 23.87 to 162.69, 22.06 to 146.89 nGy.h-1, 108.29 to 721.09 ?Sv.y-1, 81.74 to 503.59 ?Sv.y-1, 0.06 to 0.44, 0.09 to 0.88, 0.09 to 0.55, 0.04 to 0.68, from 0.38 10-3 to 2.52 10-3, respectively. A statistical analysis of results and comparison with other studies and international recommended values have been done.

Auteur(s) : Ousmane NDOUR, Coumba Thiandoume, Alassane Traore, Xavier Cagnat, Maurice Ndeye, Ababacar Sadikhe Ndao, Adams Tidjani,
Année de publication : 2020
Revue : Journal of Radioanalytical and Nuclear Chemistry
Type : Article
Mise en ligne par : TIDJANI Adams