Assessing radiological risks and natural radioactivity in building materials from Ica, Peru

• Autores: Liza, Rafael, Díaz, Félix, Cerna, Nhell, Pereyra, Patrizia, Palacios, Daniel, Rojas, Jhonny, Sajo, Laszlo
• Formato: objeto de conferencia
• Fecha de Publicación: 2024
• Institución: Universidad Tecnológica del Perú
• Repositorio: UTP-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.utp.edu.pe:20.500.12867/14199
• Enlace del recurso: https://hdl.handle.net/20.500.12867/14199; https://doi.org/10.18687/LACCEI2024.1.1.1087
• Nivel de acceso: acceso abierto
• Materia: Building Materials; Radiological Risks; Radionuclides; https://purl.org/pe-repo/ocde/ford#2.02.04

The study investigated the radon emission rate and potential radiological hazards of high-uranium-content building materials in The Ica area of Southwestern Peru. We used a creative technique that combined a closed chamber and active monitor, and it was improved by a hermetic sealing method to maintain secular equilibrium well. The results showed radon emission rates as low as below detection limits (BDL) up to 52.3 mBq/kg·h. Our analyses with a 3' x 3' NaI detector found radionuclide concentrations in cement samples by gamma spectrometry. We found a high positive correlation between radium activity concentration and radon exhalation rate. The activity concentrations of 226Ra, 232Th, and 40K differ significantly, with maximum values reaching 60.6, 22.3, and 1074 mBq/kg·h. We consider these results significant for the safety of materials in the Peruvian construction sector. And we also hope that they will provide information to support radiological risk management.