MEASUREMENTS OF SEASONAL VARIATIONS OF RADIOACTIVITY DISTRIBUTIONS IN RIVERINE SOIL SEDIMENT OF ADO-ODO OTA, SOUTH-WEST NIGERIA: PROBABILISTIC APPROACH USING MONTE CARLO

Omeje, Maxwell and Adewoyin, O.O and Joel, E. S. and Ijeh, Ikechukwu B and Timothy-Terhile, Mary A and Okoro, Emeka Emmanuel and Omeje, U.A. and Adeleye, Bosede Ngozi and Orosun, Muyiwa Michael and Oha, I. A. and Ogunrinola, I. E. and Ahuekwe, Eze Frank and Saeed, M. A. (2021) MEASUREMENTS OF SEASONAL VARIATIONS OF RADIOACTIVITY DISTRIBUTIONS IN RIVERINE SOIL SEDIMENT OF ADO-ODO OTA, SOUTH-WEST NIGERIA: PROBABILISTIC APPROACH USING MONTE CARLO. Radiation Protection Dosimetry. pp. 1-14.

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Abstract

The radioactivity levels were measured using a hand-held gamma-ray survey meter and NaI (Tl) based gamma spectroscopy to evaluate the seasonal variation of radioactivity levels in the riverine area of Ado-Odo Ota. The measured iso-dose map reported higher gamma dose rate of 79 nGy/h, approximately 34% higher than the world average of 59 nGy/h. The values for U-238, Th- 232 and K-40 activity levels ranged between 29.9 and 21.6; 103.2 and 31.2; 802.2 and 233.5 with mean values of 26.1, 55.6 and 499.3 Bq/kg, respectively. According to the mean, 5th and 95th percentiles of the probabilities using theMonte Carlo simulation, the Radium equivalent activities and the absorbed dose rates are within their respective recommended limits of 370 Bq/kg and 84 nGy/h. This study could be used to monitor dose rates and radiological risks for the areas covering the small area (Ado-Odo Ota) to the larger area (West African Region) as baseline data.

Item Type:	Article
Subjects:	H Social Sciences > H Social Sciences (General) H Social Sciences > HB Economic Theory
Divisions:	Faculty of Law, Arts and Social Sciences > School of Social Sciences
Depositing User:	Mrs Hannah Akinwumi
Date Deposited:	27 May 2021 13:56
Last Modified:	27 May 2021 13:56
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/14184

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