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tracer gas

The use of tracer gas methods for detailed airborne moisture transport study in buildings.

Three different examples illustrate the possibilities offered by the use of tracer gas methods for detailed airborne moisture transport studies in building. The first one concerns an individual dwelling with severe condensation problems, the second one gives an example of statistical data collection of humidity related parameters in 18 apartments and the last one focuses on the evaluation of the amount of water evaporating from the building materials of a recently built low energy dwelling and on the energy consumption required for drying the construction.

Quantification of radon migration from a uranium mine through the soil into buildings by the use of tracer techniques.

This paper describes the results of a series of tracer gas tests performed in the mining community of Schlema in eastern Germany. The purpose of these tests was to determine the influence of various mechanisms and subterranean features on the radon levels in the ambient air and in the buildings of the community. Under the former Democratic Republic of Germany (the DDR regime), the mines in and near Schlema and in the ore mountains in Sachsen were an importance source of uranium. These mines have now been closed down and the area is currently under remediation.