What is the real radiation level of the x-ray baggage scanner security machine?
There are often friends who worry about the radiation problem of the x-ray baggage scanner security check machine. Will it be good to shoot at the body after passing the security check every day? Is it harmful to the body? Will radiation affect the health of the security check worker? In fact, the worry of the netizens is that the security check machine used in the large-scale subway activities is almost the radiation index. The basic parameters of the line security check machine designed for the subway Museum and other scenes are Bid:
Channel size 660 (W) x 505 (H) mm
The belt speed is 0.22m/s and the rated load is 170 kg. The line resolution is 40 AWG.
Spatial resolution horizontal: diameter 1.0mm vertical: diameter 1.0mm penetration resolution 32awg penetration 38mm steel plate
Tube voltage / tube current: 140-160kv 0.41.2ma leakage dose < 0.05 μ Gy / h
Leakage dose less than or equal to 0.05 μ Gy / h
Suppose that the security inspector works 8 hours a day and has no rest all year.
The equivalent dose received in one year is: 0.05 * 8 * 365 = 146 μ Gy = 0.146mgy
Since the radiation weight factor of X-ray is 1, the annual absorbed dose of the security inspector is 0.146 * 1 = 0.146msv.
When you go to the hospital for CT, the absorbed dose is about 5 to 10 msvs. You do nothing and live well in nature. You will also receive 1-2 mSv of natural radiation dose. The internationally recognized personal safety dose limit is 20msv / year.
That is to say, if a person passes through the security machine at a speed of 2 seconds, 0.05 / 60 = 0.0008msv is such a small dose that basically will not cause harm to the human body, so
In the future, we can not only pass the security check safely and boldly, but also the job of security inspector is harmless to the body, so don't worry too much.