Natural radiation 

There are three main sources of natural radiation: cosmic rays, terrestrial radiation and radioactive substances in vivo. According to statistics, the average annual public caused by natural radiation dose values listed in the table below. Irradiated ingredients annual effective dose (mSv) 

Normal background exposure increased regional areas of cosmic rays 0.38 2.0 

Cosmogenic radionuclide 0.01 0.01 terrestrial radiation: external beam 0.46 4.3 

Terrestrial radiation: internal radiation (radon except) 0.23 0.6 

Internal exposure to radon and its decay matter: terrestrial radiation 

Inhalation of 222Rn 1.2 10 

Inhalation of 220Rn 0.07 0.1 

Ingestion 222Rn 0.005 0.1 

Total 2.4 

Artificial radiation 

Artificial radiation sources including radioactive diagnostic and therapeutic radiation such as x-ray radiation, radioactive drugs, radioactive waste, falling dust and irradiation of nuclear weapons, nuclear reactors and accelerators to produce an explosion. According to historical records, the average artificial radiation generated by the public 

Annual dose values listed in the following table. 

Radiation dose (mSv / year) 

Diagnostic radiology: 0.22 

Radiation therapy: 0.03 

Medical isotopes: 0.002 

Radioactive Waste: 0.002 

Falling dust explosions: 0.01 

Occupational exposure: 0.009 

Other radiation: 0.012 

Around the plant: 0.001 to 0.02