Acciones de rehabilitación frente a la entrada de gas radón
Abstract
The World Health Organization (WHO), and other international organizations in radiation
protection, classified the Radon gas as a pathological agent for users in buildings. Because of its
origin, in the decay chain of uranium, radioactive effects involve increasing risk of lung cancer.
Originated from soils having granite or other substrates bearing uranium, it penetrates those
common construction materials, such as concrete slabs, basement walls, etc. Various routes can be
considered to prevent the entry of Radon in inhabited spaces in existing buildings. An experimental
module of housing was built for this investigation, analyzing the radon concentrations. The
atmospheric pressure was correlated and identified as a determining parameter in flow variation in
radon into a building without protection. Protective measures were then implemented as
rehabilitation actions based on soil depressurization systems. These systems have used sumps in
two different locations and two types of extraction, forced or natural. The results show greater
effectiveness in the sump under slab, using natural or forced extraction, and high effectiveness of
the outer sump, only under forced extraction. Effectiveness in the range of 91-99 % were achieved
in all cases except in the outer sump with natural extraction that reached an average of 55 %
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References
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