According to the national standard GB15208.1-2005, the single inspection dose of the X-ray security checker should not be greater than 5μGy, and at the same time, the X-ray dose at any place 5cm away from the external surface of the equipment (including the entrance and exit of the equipment) should be less than 5μGy/h.
According to the data reported by the United Nations Scientific Committee on Radiation Effects, the radiation dose of a medical X-ray chest X-ray examination is 50μGy.
According to the data reported by the UN Scientific Committee on the Effects of Radiation, the radiation dose of a medical X-ray chest X-ray is 50μGy, which means that even if a person is really put into this X-ray screening device used by the LRT, it will take about 100 scans to reach the radiation dose received by a chest X-ray.
2 times a year every day security check is equivalent to 2 hours by plane
Many netizens and raised this question, security check a single radiation is very low, but if every day on the subway, the cumulative amount is not harmful?
According to the annual 365 days, every day through the subway security check 2 times, radiation dose according to the national standard GB15208.1-2005 of the maximum standard calculation, the passenger each year due to the subway security check to accept the radiation dose is not greater than 0.01mSv (10μSv), the value is only equivalent to 1.5 days of the natural background radiation dose or take the plane for 2 hours of the radiation dose, and according to the data reported by the United Nations Scientific Committee on the Effects of Radiation, the general public, in addition to natural radiation and medical radiation, the average annual dose of radiation received by the upper limit of 1,000 μGy, therefore, will not cause harm to passengers.
Security check radiation dose of 1% of the radiation dose of chest X-ray
Once involved in the rail security check radiation dose detection of an expert revealed that, in the actual measurement, for the rail part of the model of the security check instrument measurement data, a single radiation is only zero point a few μGy, much lower than the national standard of 5 μGy.
After the measurement, the rail security check radiation dose detection in fact
After calculations, in fact, the rail security radiation dose detection of a single dose of radiation, is indeed only equivalent to a chest X-ray radiation dose of 1%.
Metro light rail stations and airports, train stations and other X-ray baggage screening machine belongs to the Ⅲ ray device. According to relevant regulations, the production, sale and use of Ⅲ type of radiation device, apply for a license unit should fill out the environmental impact assessment documents, after the environmental protection department to review before the issuance of the "radiation safety license". Although the baggage X-ray security checker and medical X-ray diagnostic instrument, are through the use of X-ray irradiation of the object to be detected in order to obtain the internal image of the object, but the radiation dose of the parcel security checker is much smaller than the medical X-ray diagnostic, because the image of the parcel security check does not need to be up to the level of medical diagnostic level of resolution.
How much does radiation affect a pregnant woman's baby
"Pregnant women go through security checks, is there radiation or not?" This is the concern of many pregnant ladies on the issue of radiation.
In fact, the hand into the security instrument, the instrument is certainly radiation. But the instrument has been tested, the radiation dose is very small, than the cell phone radiation are lower, so the momentary stay of a few seconds, for people is no big deal.
And in the detection of the radiation of the appearance of the security checker, the radiation dose from the appearance of the security checker within 10 centimeters is only a few μGy. In fact, when pregnant women go through the security checker, will not be very close to the security checker, the radiation dose is very small, will not affect the pregnant women and the fetus.