An experimental and numerical study on radon transport from UMT-contaminated sand to a house basement under variable weather conditions

Saâdi, Zakaria; Marie, Laurent

doi:10.1016/j.jece.2017.07.017

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…Usually, this wine cellar house was highly occupied, and at that particular period it was closed. Generally, the high radon concentrations are expected in the basement storage and are confirmed in many studies [17][18][19][20]. The level of its contribution in radon variability is not the same everywhere as shown in Figures 2-4.…”

Section: Resultssupporting

confidence: 55%

Short-Term Measurement of Indoor Radon Concentration in Northern Croatia

Siročić¹,

Stanko²,

Sakač³

et al. 2020

Applied Sciences

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(1) Background: Radon concentrations in the environment are generally very low. However, radon concentrations can be high indoors and can cause some serious health issues. The main source of indoor radon (homes, buildings and other residential objects) can be soil under the house, while other sources can be construction materials, groundwater and natural gas. Radon accumulates mainly in the lower levels of the buildings (especially low-ventilated underground levels and basements). (2) Methods: in this paper, we have measured the indoor radon concentrations at 15 locations in various objects (basements and ground floor/1st floor rooms) in the area of northern Croatia. (3) Results: the results show a higher concentration of radon in the basement area in comparison to values measured in the ground floor and first-floor rooms. The arithmetic mean (AM) and geometric mean (GM) of basement rooms were 70.9 ± 38.8 Bq/m3 and 61.2 ± 2.2 Bq/m3 compared to ground floor and first-floor rooms 42.5 ± 30.8 Bq/m3 and 32.8 ± 2.9 Bq/m3, respectively. (4) Conclusions: results obtained (AM and GM values) are within the maximal allowed values (300 Bq/m3) according to the Euroatom Directive. However, there are periods when maximum radon concentration exceeds 300 Bq/m3. Indoor radon concentrations vary with the occupancy of the rooms and it is evident that the ventilation has significant effect on the reduction of concentration.

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Section: Resultssupporting

confidence: 55%

Short-Term Measurement of Indoor Radon Concentration in Northern Croatia

Siročić¹,

Stanko²,

Sakač³

et al. 2020

Applied Sciences

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“…Several known models are based on the hypothesis of the significant (and even dominant) role of the convective mechanism of radon transport over diffusion. For example, the total flux term in the mass balance equations in the works (Saaˆdi, 2018;Saaˆdi and Marie, 2017) is assumed to be a result from both advection and diffusion, and is calculated according to Darcy's and Fick's laws. However, it was shown in Minkin's (2002) and Minkin and Shapovalov's (2008) works that, as follows from the analysis of experimental and theoretical data, in many cases this hypothesis is not confirmed; there are many uncertainties and contradictions between the model of radon transport due to pressure drop and experimentally established facts.…”

Section: Introductionmentioning

confidence: 99%

Resistance of building foundation to radon penetration

Gulabyants

Livshits

Kalaydo

et al. 2019

Journal of Building Physics

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Two-dimensional model of the steady-state diffusion radon transport from the soil to the ground floor of the building is developed. Radon concentration distributions in the soil and the living space are calculated at different foundation geometries. The model considers radon entry from enclosing structures, outside air, and diffusion from the soil. The radon field under the building is described. The quantitative criteria for the resistance of the building foundation to radon penetration from the soil are defined. It is found that the resistance of the ground slab to radon penetration and radon concentration in the plane of the soil structure contact have a decisive influence on indoor radon, and that the initial distribution of radon concentration in the soil changes significantly after the building erection. These changes depend on the radon potential in the soil, its radon permeability, resistance of the floor structure to radon penetration, and building geometry.

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Comparison Between Equivalent Continuum and Discrete Crack Models of Transient Radon Transport at the Soil–Building Foundation Crack Interface Using TOUGH2/EOS7Rn

Saâdi

2018

Transp Porous Med

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An experimental and numerical study on radon transport from UMT-contaminated sand to a house basement under variable weather conditions

Cited by 4 publications

References 29 publications

Short-Term Measurement of Indoor Radon Concentration in Northern Croatia

Short-Term Measurement of Indoor Radon Concentration in Northern Croatia

Resistance of building foundation to radon penetration

Comparison Between Equivalent Continuum and Discrete Crack Models of Transient Radon Transport at the Soil–Building Foundation Crack Interface Using TOUGH2/EOS7Rn

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