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→Exposure to Radon at Home
Governments usually set [[Radon For Governments and Employers#Radon Recommendations for Authorities|reference levels for indoor radon]] in the 100-300 [[Radon: Units of Measure|Bq/m<sup>3</sup>]] range
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|style="border: 1px solid #4682B4;" | The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) is the leading international body on radiation levels and effects. Visit the [http://www.unscear.org/ UNSCEAR website] or read the UNEP report on [https://wedocs.unep.org/handle/20.500.11822/7790;jsessionid=E71B4A7CFB4A79AB88CAC19654B2CBF7 "Radiation Effects and Sources"] based on UNSCEAR work to learn more
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===Quotes from Publication===
'''''Publication 126'' paragraph 22-25'''
While the radon concentration from soil to outdoor air is diluted rapidly, this is not the case if the flux enters closed premises such as dwellings … there is a pressure differential between the soil and the foundations of the building. This causes an enhanced flow of radon-rich soil air...
The transfer of radon from the soil to buildings depends on several parameters:
*the composition of the soil (chemistry, geology, soil moisture, and permeability to radon);
*the concentration of radon in the soil;
*the difference in pressure between inside and outside of the considered building or location, between the soil and the atmosphere surrounding the building, and between the soil and the lower rooms of the building;
*the area of building in contact with the ground; and
*the air tightness of the outer shell of the building, including the presence of cracks, pipe ducts, cable ducts, etc., especially in the floors and foundations of the building.
The transfer of radon within buildings also depends on several factors:
*the circulation of air in the building depending on ventilation and air conditioning;
*the meteorological and seasonal parameters, mainly the temperature difference between outside and inside air;
*the floor level and the size of the rooms; and
*the lifestyle choices, such as opening doors and windows, and the working habits of the building occupants.
Radon can be released from [building] materials into the surrounding air. … However, in the majority of cases, this source of radon is of secondary importance…
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