The word radon may give most of us unpleasant sensations. We know that radioactive radiation has the effect of causing this to be carcinogenic and that someone who is raining a radon house is also at risk of major economic losses.
The wisdom is not seldom a little "fuzzy", which probably contributes to a greater concern and anxiety than may be justified. Naturally, the risks of radiation from radon are not to be ignored, but are not exaggerated.
It is not uncommon for us to draw a similarity between moldhouses and radon houses, and also imagine the latter as smelly and on the way to being destroyed by rot. However, nothing can be more wrong. The only common denominator for radon and mold is that both are combated most effectively with good ventilation - simply with fresh air.
In fact, we did not meet the term seriously until the 1970s. Only in 1979, the state appointed the large investigation which would map radiation risks in buildings and suggest measures. In line with our increased knowledge, the radon hazard had grown to a serious problem.
The subject radon was discovered in 1899 by the British physicist Ernest Rutherford. It was only a couple of years after the French physicist Antoine Henri Becquerel, in turn, discovered the natural radioactivity, for which he received the Nobel Prize in 1903.
It would therefore last for about 90 years, that is, the Chernobyl disaster - before the word Becquerel became widely known. The word Becquerel is included in the unit (Bq per m3) which indicates the radon content of a house and shows whether the house is a radon house or not.
Radon is a gaseous element with the chemical character Rn and atomic number 86. It belongs to the noble gases, is odorless and has half-life 3.8 days. This time applies to the most common radon variant - the isotope.
The desirability and disadvantage of radon is its radioactivity. The subject is used in radiation therapy, but it can also cause a lot of worry when it comes uncontrolled from land, water and some building materials. Radon occurs when the radioactive substance radium decomposes - a process that is ongoing and which we can not influence.
Radon itself has low radioactivity, but radon is in turn formed so-called radon daughters. And it is primarily the radiation from those that can be so concentrated that we have to talk about it as an environmental hazard. Radon daughters have half-lives in the order of minutes.
Blue Concrete - also known as blue gas concrete or blue-gray light concrete is a building material with aluminum cavity. It started to be manufactured in 1929 and proved to contain a lot of radium and a significant radon content indoors. The production of blue concrete ceased in 1975, but during the almost 50 years it was produced it was part of a number of buildings.
If you have a house built after 1929 and before 1975 you should find out if blue concrete is included in the building and if so is the case let's do a radon test and radon measurement.
Replacing blue concrete in walls and floor joints is so costly that it's almost never worn to even reflect. To paint over blue concrete goes today there are special radontapes, with it's not certain that it is an efficient method because each house is unique. Therefore, always an inspection and radon test is important to see which method is most efficient.
If the remediation costs are so high that they exceed the value of the property or if the row subsidy content is found to be so high that it is considered to be a sanitary nuisance, there are some options for grant loans and interest rate support. The County Council Board may report.
Nowadays, no new houses are built with materials that can cause high radondrotters indoors. It is thus most in the older house the risk exists. The big "upper" is blue-gray light concrete, the one that is called blue concrete.
The radon content of a house can directly depend on the amount of blue concrete used in the building and the amount of radioactivity the concrete has. However, radiation intensity also depends on how tight the surface layer of blue concrete walls is and how effective the ventilation works.
It is not enough to weigh
It's only a lasting ventilation - which drains the contaminated air and replaces it with fresh - that helps.
The ventilation does not necessarily have to be fan driven but can in many cases be self-sustaining.
Increases the vacuum pressure, further radon is sucked into the house, and the hazardous radio-daughter content remains or even increases. Therefore, if you improve the ventilation of your house, you must also often seal the ground and complete the fresh air intake in the outer walls.
If the radon gas is only from blue concrete, increased ventilation is almost always effective. Can you double the air turnover, you usually halve the radon content. In houses with self-ventilating - most houses have this system, however, it should be noted that the effect can be relatively low. When it's hot outside, it's even more diminished.
A small glossary
= The phenomenon of the atomic nuclei of some of the atoms falling apart without external influences. In these decays, different kinds of radiation are emitted.
Activity of a radioactive substance
= number of decays per second. Becquerel
= device of activity. A becquerel is the same as a breakdown per second. Becquerel shortens Bq. Radium
= a natural radioactive substance that is and will always be found in our environment. When radium decays, a series of new substances are formed, which are also radioactive. Radium shortens Ra. Radon
= the radioactive element of the noble gases shortened Rn. Radon daughters
= the radiation sources that occur when radon decomposes. ionizing radiation
= the electrically conductive radiation Radiation dose
= the energy received per kilogram of body tissue.
Sievert = the unit of a radiation dose, shortened Sv.
Video: Radon: What is it? How to Get Rid of It|