2017 International Nuclear Atlantic Conference - INAC 2017 Belo Horizonte, MG, Brazil, October 22-27, 2017 ASSOCIAÇÃO BRASILEIRA DE ENERGIA NUCLEAR – ABEN DETERMINATION OF THE 226Ra, 228Ra AND 210Pb CONCENTRATIONS IN THE MINERAL WATER SPRINGS FROM WATER PARKS OF CAMBUQUIRA AND MARIMBEIRO, MINAS GERAIS AND ASSESSMENT OF THE COMMITTED EFFECTIVE DOSES. Laíssa A. B. dos Santos1 and Sandra R. Damatto1 1Instituto de Pesquisas Energéticas e Nucleares (IPEN / CNEN - SP) Av. Professor Lineu Prestes 2242 05508-000 São Paulo, SP
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[email protected] ABSTRACT Due to the importance of human life, water quality must be controlled and a very important parameter are the limits of the natural radioactivity of the water consumed.In relation to therapeutic practices based on water intake the radionuclides 210Pb , 226Ra and 228Ra when present, are of great importance because they contribute to the internal irradiation of individuals.The study areas of the present work were the Parque das águas of Cambuquira and Marimbeiro, located in Minas Gerais. Hence, the objective of this work was to determine the 226Ra, 228Ra and 210Pb concentrations in the springs of these parks and evaluate the committed effective doses due to its consumption.The radionuclides were determined by a radiochemical procedure in four collections at different seasons of the year. The Concentrations ranged from 4 ± 1 mBq / L to 509 ± 32 mBq / L for 226Ra, from 3.7 ± 0.1 mBq / L to 631 ± 27 mBq / L for 228Ra and 5 ± 1 mBq / L to 60 ± 5 mBq / L for 210Pb. The dose for adults from 1.21x10-01 mSv/y for 226Ra, 3.18x10-01 mSv/y for 228Ra and for 210Pb 3.02x10-02 mSv/y.