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Natural radioactivity and associated radiationhazards of some commonly used building materials in southwest Nigeria

Published online by Cambridge University Press:  24 May 2013

M.O. Isinkaye  and
J.I. Agbi
M.O. Isinkaye*
Affiliation:
Department of Physics, Ekiti State University, P.M.b. 5363, Ado Ekiti, Nigeria
J.I. Agbi
Affiliation:
Department of Physics, Adekunle Ajasin University, Akungba Akoko, Nigeria
*
* e-mail: niyikaye2002@yahoo.com
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Abstract

The activity concentrations of primordial radionuclides (40K, 226Ra and 232Th) in five different types of commonly used building materials in southwest Nigeria were measured using a low-background NaI(Tl) detector coupled to an IBM-compatible multichannel analyzer. The highest mean concentration of 40K, which was 887.5 ± 101.3 Bq.kg–1, was obtained in gravel. Also, the highest mean concentrations of 226Ra and 232Th were obtained, respectively, in sand and brick samples. The lowest mean concentrations of 40K, 226Ra and 232Th, respectively, were obtained in brick and cement sample. The annual gonadal effective dose (AGED) and other radiological parameters were estimated from the activity concentrations of the radionuclides. The highest mean values of the AGED and radium equivalent activity concentration obtained were 359.1 μSv.y–1 and 110.9 Bq.kg–1, respectively. All these radiological parameters were below the maximum permissible levels recommended for safe use of materials in building construction. It can therefore be concluded that these materials do not pose any radiological hazard to the dwellers of buildings constructed with them.

Keywords

building materialsprimordial radionuclidesradiation hazardsNaI(Tl) detector
Type
Research Article
Information
Radioprotection , Volume 48 , Issue 3 , July 2013 , pp. 355 - 365
Copyright
© EDP Sciences, 2013

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