Objective To monitor the environmental cumulative radiation dose in the subway stations in Songjiang District of Shanghai, and to understand the radiation risks of X-ray luggage inspection systems to the staff and the public.
Methods The environmental cumulative radiation dose of X-ray luggage inspection systems in nine Songjiang subway stations were measured with thermoluminescent detector.
Results No significant differences were found among cumulative radiation absorbed doses (F=1.549,P>0.05) and annual estimated radiation absorbed dose (F=1.548,P>0.05) in accessible areas.
Conclusion The environmental cumulative radiation dose is very low and poses little health risks to the security staff and the public. It is important to strengthen the radiation protection and reduce unnecessary X-ray irradiation.
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