Natural Radioactivity

Life on earth has evolved in the presence of radiation, as radioactive materials occur naturally throughout the environment, for example, in the high energy particles of cosmic rays that strike Earth’s atmosphere or the presence of radionuclides in the earth’s crust.

Over 85 per cent of total dose absorbed by human comes from natural sources, with about half coming from radon decay products in the home. Medical exposure of patients accounts for 14 per cent of the total, whereas all other artificial sources — fallout, consumer products, occupational exposure, and discharges from the nuclear industry — account for less than 1 per cent of the total value. (Information Source: IAEA).

Sources of radiation:
Medidas Ambientales measures the concentration of radon in the air, so as to comply with Nuclear Safety Council Instruction IS-33 of 21 November 2010 on the radiological criteria for the protection against exposure to natural radiation.