Author(s)

Epi Zita Tatiana Kocola Achi^1*, Bogbé Douo Louis Huberson Gogon^1,2, N’Guessan Guy Léopold Oka^2,3, Antonin Aka Koua^1,2, Marie Chantal Kouassi Goffri^1,4

¹Laboratoire des Sciences de la Matiè re, Environnement et de l’Energie Solaire (LASMES), Université Fé lix Houphouët Boigny, Abidjan, Côte d’Ivoire.
²Autoritéde Radioprotection de Sûreté et de Sé curité Nuclé aire, Abidjan, Côte d’Ivoire.
³Institut de Recherche en Energies Renouvelables (IREN), Université Nangui Abrogoua, Abidjan, Côte d’Ivoire.
⁴Académie des Sciences des Arts des Cultures d’Afrique (ASCAD), Abidjan, Côte 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.

North Rivera (NR) Well Field, Borehole Water, Natural Radioactivity, Gamma Spectrometry, Total Indicative Dose, Committed Annual Effective Dose

Kocola Achi, E. , Huberson Gogon, B. , Léopold Oka, N. , Koua, A. and Kouassi Goffri, M. (2023) Total Indicative Dose Determination in Water from the North Riviera Well Field of SODECI in Abidjan, Cote d’Ivoire. Journal of Environmental Protection, 14, 1006-1015. doi: 10.4236/jep.2023.1412055.