An approach to the subslab depressurization remedial action in a high Rn-222 concentration dwelling

作者：Llerena J J^*; Cortina D; Duran I; Sorribas R

来源：Journal of Environmental Radioactivity, 2010, 101(3): 219-225.

DOI：10.1016/j.jenvrad.2009.11.002

• Environmental radioactivity
• Radon-prone area
• Remedial action
• Radon
• Charcoal canister
• Etched track detector
• Continuous measurements
• LR-115
• CR-39
• Alphaguard

Galicia (NW Spain) is a radon-prone area in the Iberian Peninsula. Measurements were carried out at a rural dwelling, with an annual average of radon concentration over 4000 Bq m(-3) and a maximum of 9000 Bq m(-3), found during a radon screening campaign held in the Autonomous Community of Galicia. We performed a detailed study to identify the main contamination source and the behaviour of the radon concentration, in which a linear dependence with temperature was verified, once corrected for relative humidity. We used different passive methods (charcoal canisters and two types of etched track detectors) as well as a radon concentration monitor that provided continuous measurement. Subsequent to this characterization, and in order to reduce the high radon concentration, a remedial action was developed using different passive and forced ventilation methods. A modified subslab depressurization technique was found to be the most effective remedy, providing a radon concentration reduction of around 96%. This method also has the advantages of being inexpensive and reliable over time.

• 出版日期2010-3