What is Radon Gas ?
Radon is a radioactive gas that is discharged from the dirt soil and various building materials, including plaster, stone, and concrete. Radon is a radioactive decay of radium. This radium is naturally present in soil and in building materials that come from the ground.
Radium is a rot result of uranium, which occurs everywhere in the Earth's crust.
That building materials contain radium is inevitable. However, one can influence the quantity. Radon is an honorable gas, which does not tie to different substances. The stuff that most radon is released from, the so-called phosphorus plaster, is virtually no longer used.
Where Radon come from ?
From the most commonly used building materials, concrete distributes the most radon. About Portland Beton, blast furnace concrete gives half more radon. Lately, the development business has been processing more and more industrial residues, such as fly ash and all kinds of plaster.
The first research results suggest that the addition of fly ash does not increase the radon emissions, although fly ash has a high radium content. According to TNO, this is because the fly ash has been processed into glass-like granules.
When people breathe radon, it can damage the lung tissue, which would increase the risk of lung cancer. The problem is that well-insulated houses work as a kind of belly so that the concentration can reach six times the naturally present background radiation.
To the physicist J. Engels, who carried out the study for environmental defense, the question of why this research has only been carried out now, while the presence of radon radiation in homes is a given that has been known for a long time. According to him, there has been a long time in our country to have two thoughts: Is Radon natural radiation or. An added? "In ' ' Scandinavian countries and the United States, the problem has been considered urgent for much longer." You can follow this video to test Radon at home and find radon test kit in here.
About half of the radon indoors comes from crawl space or basement. A third comes from building materials and the rest from the outside air. Well-insulated dwellings built by which much radon is released, know the highest concentrations.
An investigation by the University of Groningen shows that in the Netherlands roughly 40,000 houses belong to the so-called risk houses, that is, a radon concentration of 100 per cubic meter is occurring. The average in the Netherlands is 29 per cubic meter. According to English, the desired maximum is 10 Bq/m3.
The fact that the amount of radon in isolated houses can increase dramatically is according to English because in these houses relatively fresh air comes out of the creep space. Especially in the winter, when the temperature differences between the inside and outside are significant, a chimney effect is made in the house, where the air from the creep room easily lands in the house.
Areas with relatively high radon emissions from the soil are Dutch Flander, South Limburg, along with the large rivers, northeast Groningen. The groundwater level also has an impact: a relatively small reduction in groundwater can dramatically increase the radon concentration.
Radiation experts from the Radio-Biological Institute TNO and the Health Council find the calculations of environmental defense on the mortality of lung cancer by radon "very theoretical." "The numbers used in English are highly dependent on the assumptions that are applied." However, TNO and the Health Council do not deny that radon emissions also contribute significantly to the mortality of lung cancer in the Netherlands. Their calculations are based on approximately 700 of the annual over 8000 lung cancer deaths.
Environmental defense bases the numbers on a calculation of figures from a survey carried out in 1986, on behalf of the Ministry of Housing, for example, to the radon concentrations in Dutch dwellings and new estimates of the effects of Radiation to humans.
According to Dr. W. Passchier of the Health Council, it is not scientifically justified to apply the new estimates without any more to the calculation of the effects of exposure to radon. "These new estimates are based on recalculations on the impact of the atomic explosions above Hiroshima and Nagasaki. However, radon gives off a completely different type of radiation than what it was about in the nuclear bombs in Japan.