The radon distribution change and survey evaluation in public places in the district of futian

Shenzhen city is a high soil radon background district in our country. To evaluate the region public radon radiation exposure levels to the human, RAD-7 was used to supervise indoor radon concentration levels at the selected 44 different public sites. The results of survey show that places the arithmetic mean is 26.7 ± 17.3 Bq/m³, and the geometric average is 22.3 ± 1.9 Bq/m³ for the indoor radon concentration in the district of Futian public; indoor radon concentrations are varied with different building materials, with the highest in high-rise building; compared to historical data, only high-rise building indoor radon concentration is on the rise. The survey data of public indoor radon concentration could have certain reference significance for the evaluation and protection in the city of Shenzhen. (authors)