Concentration Measurements of Radon 222 Indoors in Lima – Peru

Abstract

The measurement of the levels of 222 Rn was accomplished during autumn to spring season in 2014 at residences distributed throughout 30 districts of Lima Metropolitan Area, including the north, centre and south areas of the city. The houses where the measurements were achieved were selected considering several variables as type of construction, age, construction materials, coatings, soil type, occupational use of rooms monitored, etc. For all the measurements of 222 Rn passive detectors was used (Solid State Nuclear Track Detectors SSNTDs) of cellulose nitrate (LR-115). Procedure and data acquisition are described and results; this monitoring is the first realized in this city. The results are only indicating the presence of 222 Rn, the detectors used do not allow to the discrimination of its descendants.

Residential Radon in Central and South America: A Systematic Review

“…Table 1 gives a description of the studies selected, broken down by year of publication. In the Central American region, residential radon measurements were solely found for Costa Rica [17], while in South America they were found for Argentina [18][19][20][21][22][23], Brazil [16,21,[23][24][25][26][27][28][29][30][31][32][33][34][35], Chile [20,36], Colombia [37], Ecuador [21,23,38,39], Paraguay [20], Peru [21,23,[40][41][42][43], and Venezuela [21,44]. Most of the studies involved radon measurements taken in areas or regions within a given country.…”

Measurement of radon in soils of Lima City - Peru during the period 2016-2017

“…Data collection was conducted over 36 consecutive periods in the 20 holes from April 2016 to September 2017 (Table 2). After exposure, detectors were chemically etched in 2.5 N NaOH solution at 60°C during 90 minutes (Fleischer et al, 1975;Salama et al, 2006;Mehta et al, 2014;Pereyra et al, 2015). Etched detectors were analyzed in an automatic reading system (Polytrack) to determine the net track density.…”

La exposición al radón en las viviendas: ¿Un problema de salud pública? La necesidad de la implementación de un programa integral de vigilancia de radón

“…Los resultados hallados se desarrollaron en periodo de dos años, donde encontraron que las concentraciones de radón en la zona de Lima Centro (205 Bq m -3 ), justamente donde se encuentran las viviendas más antiguas, y en Lima Sur (182 Bq m -3 ) fueron mayores en comparación a las demás zonas de Lima. 19 Posteriormente, dos tesis de postgrado se enfocaron en desarrollar mapeos distritales de radón en Lima Metropolitana 2015-2016, la primera en el distrito San Martin de Porres y la segunda en el distrito de San Luis. En el primer distrito, las concentraciones promedio de 222 Rn en el interior de viviendas monitoreadas fue de 155,6 Bq m -3 y determinaron una probabilidad de 7,6 % de superar el nivel de referencia de 200 Bq m -3 establecido por el Instituto Peruano de Energía Nuclear (IPEN).…”