Abstract:
Objective To evaluate the radon concentration in an underground public space under the background of Hongqiao-Wujiaochang fault structure, including subway stations, shopping malls, and parking lots.
Methods The radon concentrations in underground public space were measured by electronic radon monitor(RAD-7).
Results On the underground level of Shanghai Railway Station, the radon concentrations were in the range of <3.3-16.2 Bq/m3 for the platforms, <3.3-13.0 Bq/m3 for the shopping malls, and <3.3-8.84 Bq/m3 for the parking lots. The radon concentrations of the underground parking lots of Hongqiao High speed Railway Station were <3.3-4.25 Bq/m3.
Conclusion As the result of Hongqiao-Wujiaochang fault structure suspending its tectonic process since Middle Pleistocene, the possibility of radon channeling up to the ground surface declines. In addition, the filtration and adsorption effects of overlying loose sediment cap since Quaternary result in even lower radon concentrations in the studied underground spaces than the average radon level in similar spaces in Shanghai or the results from previous published similar studies.
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