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Total Indicative Dose Determination in water from the North Riviera Well Field of SODECI in Abidjan, Cote d’Ivoire

Journal of Environmental Protection 2023年第12期14卷 1006-1015页

作者： Epi Zita Tatiana Kocola Achi Bogbé Douo Louis Huberson Gogon N’Guessan Guy Léopold Oka Antonin Aka Koua Marie Chantal Kouassi Goffri Laboratoire des Sciences de la Matiè re Environnement et de l’Energie Solaire (LASMES) Universit&eacute F&eacute lix Houphou&eumlt Boigny Abidjan C&ocircte d’Ivoire Autorité de Radioprotection de S&ucircret&eacute et de S&eacute curit&eacute Nucl&eacute aire Abidjan C&ocircte d’Ivoire Institut de Recherche en Energies Renouvelables (IREN) Universit&eacute Nangui Abrogoua Abidjan C&ocircte d’Ivoire Acadé mie des Sciences des Arts des Cultures d’Afrique (ASCAD) Abidjan C&ocircte d’Ivoire

The Uranium-238 (238U), Thorium-232 (232Th) families and Potassium-40 (40K) are of terrestrial origin and contribute generally to an individual’s external exposure through our presence in this environment. They also contribute to the internal exposure through the ingestion of products and beverages such as water that are close to the earth. The aim of this work is to determine the committed effective dose or Total Indicative Dose (TID) due to gamma radioactivity of the borehole water from the Nord Riviera (NR) well field operated by the Côte d’Ivoire water Distribution Company (SODECI) for the supply of drinking water to part of the population of Abidjan. In addition, the populations, with their habits, could use these borehole waters directly as drinking water. To this end, water samples from the seven (07) functional boreholes were collected and analyzed on a gamma spectrometry chain, equipped with an HPGe detector in the laboratory of the Radiation Protection Institute (RPI) of the GHANA Atomic Energy Commission (GAEC). The results of the specific activities of 238U, 232Th and 40K obtained were transcribed into TID. As the natural radioactivity of the borehole water is high [1], the TIDs calculated from the activity results of the natural radionuclides238U, 232Th, and 40K vary for the seven boreholes from 0.150 to 0.166 mSv/yr with an average of 0.161 ± 0.034 mSv/yr. The TID of the control tower, where the borehole water is mixed and treated for household use, is equal to 0.136 ± 0.03 mSv/yr. The TIDs obtained are therefore all slightly greater than the WHO reference dose value of 0.1 mSv/yr. But all remain below the UNSCEAR reference dose of 0.29 mSv/yr.

关键词： North Rivera (NR) Well Field borehole water Natural Radioactivity Gamma Spectrometry Total Indicative Dose Committed Annual Effective Dose

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