Preliminary study on the levels of natural radionuclides in sediments of the Tono irrigation dam, Navrongo

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Author(s) Raymond Agalga | E O Darko | Cyril Schandorf
Pages 770-776
Volume 2
Issue 11
Date November, 2013
Keywords Tono Irrigation dam, sediments, gamma spectroscopy, natural radionuclide, hazard index

The concentrations of natural radionuclide 238U, 232Th and 40 K in the sediments of the Tono irrigation dam have been evaluated using gamma spectrometry. The study was carried as part of efforts to acquire data needed by the Regulatory Body in Ghana to set NORM standards for the country. From the study, the concentrations of natural radionuclides 238U, 232Th and 40 K ranged from 5.19Bq/Kg to 8.66 Bq/Kg with an average of 7.31Bq/L for 238U, 5.83 Bq/Kg to 8.16 Bq/Kg with an average of 6.91 Bq/Kg for 232Th. and 218.73 Bq/Kg to 453.25 Bq/Kg with an average of 379.94 Bq/Kg for 40K. The Radium Equivalent Activity(Raeq), Internal Hazard Index( Hin), External Hazard Index(Hex) , Indoor Absorbed Dose Rate (Din) and the corresponding Indoor Annual Effective Dose (ADE) were evaluated for the public to assess radiological hazard arising due to the use of the sediments as a building material. The results were observed to be lower than limits internationally reported and recommended for building materials.

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