%0 Journal Article
%T Evaluation of NORM and Dose Assessment in an Aluminium Industry in Nigeria
%A Janet Ayobami Ademola
%A Michael Adekunle Olatunji
%J World Journal of Nuclear Science and Technology
%P 150-154
%@ 2161-6809
%D 2013
%I Scientific Research Publishing
%R 10.4236/wjnst.2013.34025
%X <p align=\"justify\">
	<span><span style=\"font-family:Verdana;\">The activity concentrations of natural radionuclides </span><sup><span style=\"font-family:Verdana;\">226</span></sup><span style=\"font-family:Verdana;\">Ra, </span><sup><span style=\"font-family:Verdana;\">232</span></sup><span style=\"font-family:Verdana;\">Th and </span><sup><span style=\"font-family:Verdana;\">40</span></sup><span style=\"font-family:Verdana;\">K in bauxite ore, alumina, dross tailing, alumin</span></span><span style=\"font-family:Verdana;\">ium scraps and soil samples collected from an aluminium industry in Nigeria were determined by gamma ray spectros</span><span><span style=\"font-family:Verdana;\">copy method. The mean values of </span><sup><span style=\"font-family:Verdana;\">226</span></sup><span style=\"font-family:Verdana;\">Ra, </span><sup><span style=\"font-family:Verdana;\">232</span></sup><span style=\"font-family:Verdana;\">Th and </span><sup><span style=\"font-family:Verdana;\">40</span></sup><span style=\"font-family:Verdana;\">K content of the samples ranged from 16 ¡À 6 (alumina) to 31 ¡À 10 (scrap), 41 ¡À 0.12 (scrap) to 134 ¡À 21(bauxite) and 47 ¡À 14 (bauxite) to 354 ¡À 8 (scrap) Bq<span style=\"font-family:ËÎÌå;font-size:9pt;\">¡¤</span>kg</span><sup><span style=\"font-family:Verdana;\">-1</span></sup><span style=\"font-family:Verdana;\">, respectively. The mean activity concentrations of </span><sup><span style=\"font-family:Verdana;\">226</span></sup><span style=\"font-family:Verdana;\">Ra and </span><sup><span style=\"font-family:Verdana;\">40</span></sup><span style=\"font-family:Verdana;\">K in all the samples are lower than the world average for soil while </span><sup><span style=\"font-family:Verdana;\">232</span></sup><span style=\"font-family:Verdana;\">Th is higher with the exception of alumina and scrap. As a measure of radiation hazard to the occupational workers and the members of the public, the radium equivalent activities and external gamma dose rates due to the radionuclides at 1 m above ground surface were calculated. The radium equivalent activities which varied between 88 ¡À 10 (alumina) and 222 ¡À 34 (bauxite) Bq<span style=\"font-family:ËÎÌå;font-size:9pt;\">¡¤</span>kg</span><sup><span style=\"font-family:Verdana;\">-1</span></sup><span style=\"font-family:Verdana;\"> are within the safety recommended limit of 370 Bq<span style=\"font-family:ËÎÌå;font-size:9pt;\">¡¤</span>kg</span><sup><span style=\"font-family:Verdana;\">-1</span></sup><span style=\"font-family:Verdana;\">. The mean annual effective doses calculated from the absorbed dose
%K NORM
%K Gamma Radiation Dose
%K Radiation Hazards
%K Aluminium
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=37929