Affiliation:
1. Department of Physics, Federal University of Technology, P. M. B. 704, Akure, Ondo State. Nigeria
Abstract
The activity concentration on natural radionuclide in some samples of commonly consumed drinks have been determined using a gamma spectrometer, NaI detector. The mean activity concentration of 40K, 232Th, and 238U in the drink samples were estimated to be 23.76 ± 1.57, 1.55 ± 0.11, and 0.78 ± 0.16 Bq/L respectively. The mean effective dose equivalent of these natural radionuclides in food drinks are 5.77, 15.35, and 11.13 µSv/y respectively for 40K, 232Th, and 238U, while the mean total effective dose equivalent from all the natural radionuclides is 32.25 µSv/y. This value is less than the 0.1 mSv/y and 1 mSv/y recommendation of WHO and NCRP respectively for maximum permissible effective dose for public exposure. The excess lifetime cancer risk was estimated to be 1.13 x 10-4, which is lower than the world average. This is an indication that there is no significant cancer risk to humans as a result of the radionuclides consumption from these food drinks.
Publisher
Addaiyan International Publishers
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