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Item type:Publication, Estimation of Indoor 222Rn Concentration in Lima, Peru Using LR-115 Nuclear Track Detectors Exposed in Different Modes(Multidisciplinary Digital Publishing Institute (MDPI), 2023-06-01)Radon is the main source of natural radioactivity, and its measurement is considered extremely important in radioprotection, given its relationship with the occurrence of lung cancer. In the last two years, measurements of this radioactive gas were carried out in Lima considering a grid of 5 km (Formula presented.) and the population density to determine the number of measurements to be carried out. Cellulose nitrate nuclear track detectors exposed in bare mode and diffusion chamber mode were used to estimate (Formula presented.) Rn concentrations. In diffusion chamber mode, non-commercial monitors and commercial monitors were used. The monitoring results are presented for 43 districts of the Lima Province whose population is approximately ten million inhabitants occupying a total area of 2655.15 km (Formula presented.). Measurements were made obtaining an average concentration of 49 Bq·m (Formula presented.) using bare detectors and 66 Bq·m (Formula presented.) using non-commercial diffusion chambers. Average concentrations obtained by both detector exposure modes were below the maximum concentration recommended by the WHO. A radon ((Formula presented.) Rn) map was also obtained as a visual representation of the (Formula presented.) Rn levels in the Lima province using inverse distance weighting (IDW) interpolation. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Baseline radon concentrations in uranium-rich and faulted zones of the Eastern Cordillera, Central Andes, Peru(Elsevier BV, 2026-08-01)Radon is a naturally occurring radioactive gas that poses environmental and health concerns, particularly in regions characterized by uranium-rich geological formations and active fault systems that facilitate its migration from the subsurface into soil gas and near-surface environments. In the Eastern Cordillera of the Central Andes, southern Peru, uranium-bearing deposits intersected by geological faults create favorable conditions for elevated radon concentrations in the soil gas and near-surface environment, due to increased permeability that enhances upward transport. However, lack of systematic data on radon concentrations in these areas has limited development of a national radon framework and constrained regional assessments. This study establishes baseline concentrations of soil gas radon (Rn-222) in faulted and uranium-bearing zones of the Eastern Cordillera. Sixteen measurement sites were surveyed across key geological units, integrating lithogeochemical analyses of uranium in rock samples with in-situ radon measurements. Results reveal spatial variability, with soil gas radon concentrations reaching up to 567 kBq/m3, including high values in structurally controlled zones despite relatively low uranium content (23 ppm). These findings demonstrate that, while uranium-rich lithologies act as primary radon sources, fault-controlled permeability and fracture networks exert dominant control on radon migration. By integrating geological, geochemical, and radon data, this study provides a framework for radon mapping in Peru. Results highlight role of structural geology in radon distribution and support soil gas radon as indicator of uranium mineralization and fault-related permeability. These insights contribute to improved radon assessment strategies and provide scientific basis for future development of a national radon potential map.