Radiological Baseline Assessment of a Naturally Occurring Radioactive Material (NORM) Waste Disposal Facility in Ghana

سال انتشار: 1402
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 93

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شناسه ملی سند علمی:

JR_JMAE-14-1_003

تاریخ نمایه سازی: 28 فروردین 1402

چکیده مقاله:

Knowledge of accurate radio-isotopic signatures of NORM waste disposal site is essential prior to the disposal, to ascertain the baseline radioactivity levels. In this work, soil and water from a NORM waste site situated at Sofokrom in the Sekondi-Takoradi Metropolis of Ghana is characterized and determined. The mean activity concentration of ۲۲۶Ra, ۲۳۲Th, and ۴۰K measured in the soil samples are ۴۰.۳۱ ± ۱۳.۹۳ Bq/kg, ۶۳.۲۹ ± ۲۳.۱۸ Bq/kg, and ۱۹۸.۷۱ ± ۴۹.۱۰ Bq/kg, respectively, with the ۲۲۶Ra and ۲۳۲Th average values being higher than the average worldwide values by UNSCEAR. Also, the average activity levels of water samples from monitoring borehole measured for ۲۲۶Ra and ۲۳۲Th are within the WHO guidance levels of ۱ Bq/L. The radiological parameters such as internal and external hazard indices (Hin and Hex), absorbed dose rate (D), and radium equivalent activity (Raeq) are estimated to assess the radiological risk to human, and compared with other similar works.  Except for the annual gonadal dose, the remaining parameters are less than the recommended values. Multivariate statistical analysis is done to establish the interrelations among the activity concentrations of the radionuclides and their radiological parameters using Pearson correlation coefficient and principal component analysis. Strong positive correlations between ۲۲۶Ra, ۲۳۲Th, and the radiological parameters are observed. These findings would serve as the reference point for assessing future variations in the background radioactivity level owing to the geological or human activities from the disposal of the oil waste in the environment, as well as to aid in improving the technical foundations for the management of the NORM waste.

نویسندگان

Edith Amoatey

School of Nuclear and Allied Sciences, University of Ghana, Kwabenya - Accra, Ghana

Eric Glover

School of Nuclear and Allied Sciences, University of Ghana, Kwabenya - Accra, Ghana

David Kpeglo

School of Nuclear and Allied Sciences, University of Ghana, Kwabenya - Accra, Ghana

Francis Otoo

School of Nuclear and Allied Sciences, University of Ghana, Kwabenya - Accra, Ghana

Dennis Adotey

School of Nuclear and Allied Sciences, University of Ghana, Kwabenya - Accra, Ghana

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