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Wyszukujesz frazę "concentration of indoor radon" wg kryterium: Wszystkie pola


Wyświetlanie 1-3 z 3
Tytuł:
Evaluation of radon risk for Białystok inhabitants regarding the type of town buildings
Autorzy:
Karpińska, M.
Kapała, J.
Szpak, A.
Mnich, Z.
Powiązania:
https://bibliotekanauki.pl/articles/148400.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
indoor radon
Białystok
mean annual concentration of radon
type of buildings
Opis:
Radon and its short-lived disintegration products are the most significant factors of exposure to ionizing radiation from natural sources. Białystok has the population of about 300,000 inhabitants in 100,460 flats in 16,282 houses. They are mostly one-family houses (about 80.7per cent) and two-family houses (8.2 per cent). It can be estimated that about 2/3 of the Białystok inhabitants live in the so-called “blocks of flats”. The study aimed at evaluation of the exposure to radon present in the flats. The integral method of trace detectors was used to measure radon concentration indoors. All values of the radon concentration were the mean annual values as they were obtained on annual exposure or were calculated and corrected to annual exposure based on shorter periods of time. Radon concentration distribution in flats of 3 housing estates in Białystok was analyzed. The effective dose of inhaled radon per a statistical inhabitant of Białystok (about 1.1 mSv) per year was calculated on the basis of mean values of radon concentration. Inhabitants of one-family houses obtained slightly higher annual doses – 1.4 mSv while the inhabitants of block of flats got lower annual doses – 0.8 mSv.
Źródło:
Nukleonika; 2010, 55, 2; 213-217
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new geostatistical tool for the analysis of the geographical variability of the indoor radon activity
Autorzy:
Loffredo, Filomena
Scala, Antonio
Adinolfi, Guido Maria
Savino, Federica
Quarto, Maria
Powiązania:
https://bibliotekanauki.pl/articles/147965.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
geographical variability
geostatistics
Gini coefficient
Lorenz curve
radon concentration
variogram
Opis:
The population is continuously exposed to a background level of ionizing radiation due to the natural radioactivity and, in particular, with radon (222Rn). Radon gas has been classified as the second leading cause of lung cancer after tobacco smoke [1]. In the confined environment, radon concentration can reach harmful level and vary accordingly to many factors. Since the primary source of radon in dwellings is the subsurface, the risk assessment and reduction cannot disregard the identification of the local geology and the environmental predisposing factors. In this article, we propose a new methodology, based on the computation of the Gini coefficients at different spatial scales, to estimate the spatial correlation and the geographical variability of radon concentrations. This variability can be interpreted as a signature of the different subsurface geological conditions. The Gini coefficient computation is a statistical tool widely used to determine the degree of inhomogeneity of different kinds of distributions. We generated several simulated radon distributions, and the proposed tool has been validated by comparing the variograms based on the semi-variance computation with those ones based on the Gini coefficient. The Gini coefficient variogram is shown to be a good estimator of the inhomogeneity degree of radon concentration. Indeed, it allows to better constrain the critical distance below which the radon geological source can be considered as uniform at least for the investigated length scales of variability; it also better discriminates the fluctuations due to the environmental predisposing factors from those ones due to the random spatially uncorrelated noise.
Źródło:
Nukleonika; 2020, 65, 2; 99-104
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First results of measurement of equilibrium factors F and unattached fractions fp of radon progeny in Czech dwellings
Autorzy:
Jílek, K.
Thomas, J.
Tomášek, L.
Powiązania:
https://bibliotekanauki.pl/articles/148749.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
unattached fraction
dose
indoor aerosol concentration
rural/urban area
day/night
Opis:
The unattached fraction of radon decay product clusters fp and equilibrium factor F are dose relevant parameters in all dosimetric approaches to dose calculation. In the past, three year continuous weekly measurements of unattached and attached activity of radon daughter product and air exchange rate were carried out during heating season in 30 occupied typical Czech family houses. The results indicated significantly different weekly averages of equilibrium factor F and fp for houses located in towns compared those in villages. Due to this fact, approximately a 10 per cent average increase of equivalent lung dose rate was estimated in the detriment in towns. Average values of equilibrium factor F and fp were 0.40 and 8.6 per cent in urban houses and 0.32 and 10.7 per cent, respectively in rural houses. Based on the measurements of mean values of fp, average effective dose conversion factors (DFC) in units of mSv per working level month (WLM) were estimated to be 15.0 mSv/WLM in urban houses and 15.9 mSv/WLM in rural houses, respectively.
Źródło:
Nukleonika; 2010, 55, 4; 439-444
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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