Sievert is a unit of measurement of radiation dose, representing the total radiation energy absorbed by a living cell and the biological extent it causes. Sievert is just one of several radiation measurement units.
According to Wikipedia, Sievert , symbol: Sv, according to the International System of Metrics is a unit of measurement for the absorption of harmful ionizing radiation. The unit is named after Maximilian Rolf Sievert, a Swedish medical physicist known for his work in radiation dosimetry and research into the biological effects of radiation.
sievert unit scale.
Radiation is rays that are invisible and can only be detected by measuring instruments. Radiation is understood as ionizing radiation, consisting of beams of microscopic particles and electromagnetic waves capable of ionizing when passing through matter, except for electromagnetic waves with wavelengths longer than 100 nm (nanometers).
1 Sv = 103 mSv = 106 Sv
The average natural radiation dose for a person is from 0.001 to 0.002 Sv or 1-2 mSv/year. A single radiograph usually requires a dose of 0.2-5Sv .
Currently, in the legal documents regulating the dose limit standards, the units of Sv/year, mSv/h, and µSv/h are used.
As recommended by ICRP (International Committee for Radiation Safety), the maximum radiation dose limit for workers should not exceed 50mSv/year. For pregnant women working in radiation conditions, no more than 2 mSv/year.
Acute symptoms (dose received within one day):