Security work will come into contact with the security equipment so will be subject to radiation, but the harm of radiation is not large, will not have a substantial impact on the staff, baggage screening instrument in the intensity of X-ray is much smaller, the radiation dose of about 1% of the medical X-ray imager. Baggage from the security checker channel through, the impact on the items in it is also basically negligible.
And baggage screening instrument on all four sides with a certain thickness of lead plate shielding, baggage screening channel is also covered with lead rubber curtains, can reduce the radiation dose on the outside surface of the screening instrument by about two orders of magnitude.
Airport security X-ray whole body scanner used to backscatter X-ray detection technology, the use of lower energy X-ray, only a few millimeters into the human skin tissue. Because the full-body scanner used by the X-ray energy and intensity are lower, so accept a full-body security check by the radiation dose is equivalent to take an X-ray film of one-fifth of a thousand, the impact is relatively small.
Expanded information:
The human body accepts the radiation standard
According to the "Ionizing Radiation Protection and the Safety of Radiation Sources", the annual radiation dose of a normal person should not exceed 1mSv. The national standard GB 15208.1-2005 stipulates that the single inspection dose of the X-ray security checker should be <5?Gy, and the X-ray dose at any place 5cm away from the outer surface of the equipment (including the entrance and exit of the equipment) should be <5?Gy/h.
Taking the X-ray security checker used in the subway as an example, its single inspection dose is 0.534?Gy, the radiation dose at 5cm of the outer surface is 0.788μGy/h, which is about 1/10 of the upper limit specified by the national standard.
According to the data reported by the United Nations Scientific Committee on the Effects of Radiation, the radiation dose of a medical X-ray chest X-ray is 50?Gy. That is to say, even if a person is really put into this X-ray screening machine, it takes about 100 scans to reach the radiation dose received by a chest X-ray.
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