A simple test structure for studies of radon entry into houses has been constructed at a field site at Riso National Laboratory. It consists of a 40 1, stainless-steel cylinder placed in a 0.52 m deep quadratic excavation with a side length of 2.4 m. The excavation is lined with an airtight membrane, and soil gas enters the cylinder through a changeable interface in the bottom. The depressurisation of the cylinder is controlled by a mass-flow controller, thereby limiting the influence of natural driving forces. Pressures, temperatures and radon concentrations are measured continuously in the cylinder and in selected locations in the soil. In this paper, the test structure is described, and initial results concerning the transport of soil gas and radon under steady-state conditions are reported. It is found that the soil in the vicinity of the structure is partially depleted with respect to radon as a result of a depressurisation of approximately 10 Pa.
|Journal||Radiation Protection Dosimetry|
|Publication status||Published - 1992|
|Event||5th International Symposium on Natural Radiation - Salzburg, Austria|
Duration: 22 Sep 1991 → 28 Sep 1991
Conference number: 5
|Conference||5th International Symposium on Natural Radiation|
|Period||22/09/1991 → 28/09/1991|