Monitoring of radionuclides in water for human consumption in the county of Angra dos Reis

The radiological impact for the population living in Angra dos Reis- RJ was assessed using environmental monitoring data from radio (Ra-226 and Ra-228), lead (Pb-210), uranium (U-238), thorium (Th-232) and cesium (Cs134 and Cs-137) in water for human consumption. For this, water samples were collected and analyzed by radiometry (Cs-134 and Cs-137), radiochemical method (Ra-226, Ra-228 and Pb-210) and by mass spectrometry with inductively coupled plasma (U-238 and Th-232). From the results, it was observed that the activity concentrations found were lower than the values established by CONAMA, WHO and the Ministry of Health. It was concluded that the presence of these radionuclides in the collected waters is natural and with levels that are not harmful to health. (author)