Our company deals with the preparation and compilation of internal gas supply, water, drain, ventilation, central heating plans for residential-, public-, communal-, industrial buildings; as well as the whole public utility supply project plans for parts of communities, settlements; together with the planning of boiler-and-heating plants, technological systems are undertaken.

The ingenuous radioactivity

The radioactive radiation pertains to the every day life of the human being. We can encumber our organism with artificial radiation dose even if we travel on an airplane, even at the preparation of X-ray images, or at the deployment of nuclear weapons, and in case of failures of atomic power plants as well. But these are not the exclusive sources of the radioactive radiation. Radioactive elements are disintegrating since the formation of the Earth in the nature. Among these the most important role the radon (222 Rn) has, which puts out at least the half of the radiation came into existence due to the natural radioactive decomposition. The diagram shows the division of the natural radioactivity befalls on the human organism. 

The radon in the constructions 

The radon gets into the buildings mainly from the soil, smaller part from the constructional materials, from the water, from the gases of the kitchen, and from the air. The radon nascent in the earth streams towards the surface through the capillary chinks of the soil, and getting to the open air it becomes attenuated. Nevertheless it can get into the houses through the cracks of the wall, the floor, as well as nearby the public supply mains. It congregates in the closed area, and disintegrates onwards there. The radon content of the interstitial air depends first of all on the uranium content of the geological formation being under the soil level, the grade of grain of the soil, its content of moisture, consistency. Its convection is affected by the moisture, by the porosity, by the gas permeability, by the pressure ratio, by the times of the day, and by the seasons. 

The effect of the radon onto the health 

The decay products of the radon  (the polonium, the bismuth, the lead – these are metals) sit on the dust particles being in the air, among others also onto the grains of the tobacco smoke. Through imbibing these sticking – depending on the size of the dust particles –on the respiratory tracts, on the different parts of the lungs, and enucleate their radiating effect. The crock ups can be detected only 10-20 years later in the radiated person. The consequence of the high radon concentration of the organism can be a malignant growth illness. Nowadays already we know: the radon and its decomposition products can cause lungs cancer. In the most of European countries attention is paid to this source of danger. The World Health Organization (WHO) realized already in 1988 the carcinogenic effect of he radon and its decomposition products. According to more international surveys over a 400-600 Bq/m3 radon concentration the increase of the risk is clearly detected. In Hungary the upper limit of the average radon concentration is 600 Bq/m3 (as a yearly average), while at the labour places the Ministry of Health determined the upper limit of the concentration as 1000 Bq/m3-ben.

The measuring of the radon 

The principle of the measuring is the determination of the decay product concentration on the base of the short half-life radon decomposition products’ alpha-particle radiation measuring. The basic principle of the measuring was worked out by TSIVOGLU and fellow-workers, and they published it in 1953.
Nowadays already modern measuring methods wait upon us. The scale of the measuring equipments extends from the simple detector radiometers to the sophisticated electric instruments.

The protection

In case of a smaller concentration it is simple: we have to ventilate! At those places, where the radon concentration is high, it is not enough to ventilate for the exhaustion of the radon, result can be achieved only with ventilators, or the reconstruction of the building structure. We would like to contribute to this, to help to you. Further details can be found from our recommended links on the right side; about the detailed description of the protection you can read more at the site of the Fizikai Szemle (Physical Review). If we piqued your attention, please contact us. 

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