Analysis of Radiation Protection Detection Results of Some Container Vehicle Inspection System
With the widespread use of X-ray vehicle inspection systems throughout the country, more and more vehicle transportation workers and equipment operators are exposed to radiation exposure, so the detection of radiation protection is of great importance. Based on the radiation protection testing results of some vehicle inspection systems in China in recent three years, the effects of accidental radiation on related employees were evaluated, and further guidance was provided for occupational safety protection of related workers. According to "Radiological Protection Requirements of Cargo/Vehicle Radiation Inspection System" GBZ 143-2015, dose equivalent rate around the boundary of radiation supervision area of X-ray vehicle inspection system, dose equivalent rate in control room and dose equivalent rate at driver's position were detected, and the detection results were analyzed and evaluated. From 2018 to 2020, detected nationwide 3 X ray radiation monitoring area border around the vehicle inspection system dose equivalent rate, control the indoor ambient dose equivalent rate and an ambient dose equivalent through the pilot position, test results show that the tested equipment radiation monitoring area boundary ambient dose equivalent rate up to 2.34 μSv/h, annual maximum growth rate of 13.33%;The maximum dose equivalent rate around the control room was 0.53μSv/h, and the maximum annual growth rate was 31.58%. The maximum dose equivalent was 0.083 μSV at the driver's position, and the maximum annual growth rate was 8.33%.The test results show that all inspection system testing results conform to the provisions on GBZ 143-2015, but with the increase of use fixed number of year, related equipment radiation increases slightly, and relevant personnel protective consciousness, protective measures do not reach the designated position, almost all is in a state of completely exposed, its radiation protection is of great urgency.