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Tech ID: 3105
Project Overview
The Cold Wringer is used to extract water by condensation from
soil gas extracted from the Vadose Zone. Tritiated and normal
water share the same gas/liquid partitioning coefficient, so the
concentration of tritium in the condensed liquid will be the same
as that in subsurface water vapor. The water vapor is condensed by
cooling below the dew point. At SRS during the summer this can be
accomplished using a small thermoelectric cooler powered by
photovoltaics or a similar low power system, because of the high
relative humidity; a 5 ml sample can be obtained in less than
ten minutes at average barometric pumping rates of 1-2 scfm.
Tritium analysis to regulatory levels can be conducted on samples
as small as 1 ml.
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