Radon concentration variations between and within buildings of a research institute

Antignani, Sara; Bochicchio, Francesco; Ampollini, M; Venoso, Gennaro; Bruni, Biagio Maria; Innamorati, S.; Malaguti, L.; Stefano, Agata Di

doi:10.1016/j.radmeas.2009.10.074

Cited by 13 publications

(15 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These results, in terms of AM and median of CV, show a similar behavior compared with results achieved in other surveys as in [10,12]. However, in [12] a similar data analysis, carried out on a sample of 29 buildings located in a restricted area (a research institute placed in Rome, Italy), showed higher values of AM and median, equal to 42% and 35%, respectively, in case of CVs calculated from radon averages of each floor of the building. Moreover, higher values of AM and median of CVs were found when CVs were calculated starting from data of all rooms (57% and 51%, respectively).…”

supporting

confidence: 89%

“…Moreover, it has been observed that the contact with soil affects radon spatial variability among rooms at the same floor, which is higher at ground and underground floors than at upper floors [11]. Therefore, the floor level significantly affects both radon averages and its spatial variability within a building [10,12,13]. Some exceptions to this general trend could be found, as will be shown in this paper for the Salento area located in southeast Italy.…”

mentioning

confidence: 48%

“…The spatial variability in radon activity concentration within buildings is a parameter to be considered when radon measurements are performed. Indeed, buildings with medium-high spatial variability need measurements in several rooms on each floor level, as already suggested in [10,12].…”

mentioning

confidence: 99%

“…considered when radon measurements are performed. Indeed, buildings with mediumhigh spatial variability need measurements in several rooms on each floor level, as already suggested in [10,12].…”

mentioning

confidence: 99%

See 3 more Smart Citations

Radon Spatial Variations in University’s Buildings Located in an Italian Karst Region

et al. 2021

View full text Add to dashboard Cite

In the framework of a collaboration between INAIL and University of Salento, an indoor radon survey in 54 buildings belonging to the UniSalento University (Southeast Italy) was carried out. The monitored buildings differ by type, construction period, materials, etc., and are located in an area with a morphology characterized mainly by marls, calcareous marls, and calcarenites (karst area). The sample of the survey includes 963 rooms at different floors: it consists in rooms mainly located at ground floor (67%), first floor (12%), and below ground (12%). SSNTD passive dosimeters measured the average radon activity concentration for two consecutive semesters (spring/summer and autumn/winter) from which annual radon averages were estimated for each room. The spatial variability within buildings was investigated in terms of variation between floors and among rooms at the same floor. Data analysis provides evidence that the distributions (in terms of arithmetic mean, standard deviation, median, and geometric mean) of indoor radon annual averages at ground floor and at first floor within building are very similar. This highlights that the karstic characteristics of soil and building materials affect radon levels not only below ground and at ground floor, but also at first floor. Moreover, to evaluate the spatial variability of radon among buildings or floors, the analysis of the distribution of coefficient of variation (CV) was carried out: the results show a low spatial variability with median and average values of CVs ≤ 30% both for the whole building and at different floor levels.

show abstract

supporting

confidence: 89%

mentioning

confidence: 48%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Radon Spatial Variations in University’s Buildings Located in an Italian Karst Region

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Em todos os ambientes acima do nível do solo, as concentrações obtidas são concordantes com os valores encontrados na literatura (Antignani et al, 2009;Papachristodoulou et al, 2010;Sánchez et al, 2012) (Campos, 1994;Lu, 2014;El Mageed et al, 2014 Uma vez que a exposição dos indivíduos aos materiais de construção ocorre, externamente pela exposição à radiação gama direta e internamente pela inalação do Rn-222 e seus produtos de decaimento de vida curta presentes no ar, torna-se necessário estimar uma dose total que considere as duas vias de exposição (Kovler, 2009, Campos, 1994.…”

Section: Detecção De Rn-222 No Arunclassified

Dosimetria de Rn-222 no ar em ambientes localizados acima e abaixo do nível do solo

Cazula¹

View full text Add to dashboard Cite

Exposure of the general population to ionizing radiation comes mainly from natural sources. The main contribution is due to inhalation of radon (Rn-222), a gas that occurs naturally (UNSCEAR, 2000). The Rn-222 concentration in the environment is controlled by factors such as soil permeability and water content, the weather variability, materials used in the foundation and the usual positive pressure differential between the soil and the internal environment. Studies indicate that the concentration of radon shows a wide variation in the basement, ground floor and upper floors of buildings. The objective of this study is to determine radon levels in basements, ground floor and floors above ground level, at a university in the city of São Paulo and in one residential building in the city of Peruíbe. Rn-222 measurements were performed using the method with nuclear track of solid state detectors (CR-39). The studied environments present Rn-222 concentration well below the values recommended by the International Commission on Radiological Protection, published in the 2009 document, of 300 Bq/m 3 for homes and 1000 Bq/m 3 for the workplace. In the residential building, the concentration of Ra-266, Th-232 and K-40 in the materials used in the building construction was also analyzed, by gamma spectrometry. The effective total dose for the resident due to external exposure was 0.8 mSv y-1 , lower than the annual dose limit for the general public of 1 mSv y-1 .

show abstract

Hierarchical modeling of indoor radon concentration: how much do geology and building factors matter?

Borgoni

Francesco²,

Bartolo

et al. 2014

Journal of Environmental Radioactivity

View full text Add to dashboard Cite

Radon concentration variations between and within buildings of a research institute

Cited by 13 publications

References 9 publications

Radon Spatial Variations in University’s Buildings Located in an Italian Karst Region

Radon Spatial Variations in University’s Buildings Located in an Italian Karst Region

Dosimetria de Rn-222 no ar em ambientes localizados acima e abaixo do nível do solo

Hierarchical modeling of indoor radon concentration: how much do geology and building factors matter?

Contact Info

Product

Resources

About