Abstract:
Objective To realize the concentr ations of
222Rn and effective dose to population in Guangzhou.
Methods 222Rn concentrations were obtained by using Rn-Tn solid state nuclear track detectors developed by The National Institute for Radiological Protection and Nuclear Safety,Chinese Centre for Disease Control.The annual effective dose from the decay of
222Rn was calculated.
Results The average indoor concentration of
222Rn is(47.3±23.4)Bq/m
3,The aver age outdoor concentration of
222Rn was(20.5±8.7)Bq/m
3.The total annual effective dose from the decay of
222Rn was 1.322 mSv/a.
Conclusion The concentrations of
222Rn in Guangzhou is at natural backgr ound level.
下载: