CFD based simulation of thoron (220Rn) concentration in a delay chamber for mitigation application

Agarwal, Tarun K.; Sahoo, Bijay Kumar; Gaware, J.J.; Joshi, Manish; Sapra, B.K.

doi:10.1016/j.jenvrad.2014.05.003

Cited by 33 publications

(12 citation statements)

References 9 publications

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“…Regional doses, weighted with factors assigned for the partition of radiation detriment, are summed to give a value of committed equivalent dose for the thoracic H Q j and extrathoracic H R j regions. According to the ICRP 66 [12], we have the following equations: H Q j = A SS H SS j + A TT H TT j + A /U H /U j (9) and H R j = A R $ H R $ j + A R V H R V j (10) where H SS j , H TT j and H /U j are the equivalent doses in the BB, bb and AI tissues of the thoracic region, respectively; H R $ j and H R V j are the equivalent doses in the ET 1 and ET 2 tissues of the extrathoracic region, respectively; A BB = 0.333, A TT = 0.333 and A AI = 0.333 are the weighting factors for the partition of radiation detriment for the BB, bb and AI tissues of the thoracic region, respectively, and A R $ = 0.001 and A R V = 1 are the weighting factors for the partition of radiation detriment for the ET 1 and ET 2 extrathoracic regions [12]. The annual effective dose (mSv y -1 h -1 exposure) due to radon decay products inside the Hammam was evaluated by using the following equation:…”

Section: Determination Of Annual Committed Equivalent Dosesmentioning

confidence: 99%

“…More recently, CFD (Computational Fluid Dynamics) simulation has taken on a distinct place in the study of the behavior of radon in indoor air. Many researchers have predicted the behavior and distribution of radon in buildings, apartments, offices, and schools, using CFD simulations [2][3][4][5][6][7][8][9]. Despite the importance of these studies, the evaluation of the influence of meteorological parameters on the behavior of radon and its descendants in indoor air has not been fully investigated using CFDs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of the Distribution of Radon and Its Decay in a Traditional Hammam: Dose to Adult Members of the Public

Rabi¹,

Oufni²,

Youssoufi³

et al. 2021

AJEP

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Radon and its descendants are the main causes of lung cancer in non-smokers. Therefore, the study of the behavior of radon and its descendants in indoor air is of the highest importance, in ordre to limit the risk of radiation dose due to inhalation of indoor air by members of the public. This article focuses to study the effect of meteorological parameters on the concentration and distribution of radon and its descendants inside a traditional Hammam by using CFD simulation. The results of modeling are qualitative and show that the concentration and distribution of radon and its descendants decrease when the ventilation rate increases, as well as, as the temperature increases; however, it increases with the increase relative humidity. Moreover, the committed equivalent doses due to 218 Po and 214 Po radon short-lived progeny were evaluated in different tissues of the respiratory tract of the members of the public from the inhalation of air inside the traditional Hammam. The influence of the activity of 218 Po and 214 Po and mass of the tissue on the committed equivalent doses per hour of exposure was investigated. The annual effective dose due to radon short-lived progeny from the inhalation of air inside the traditional Hammam by the members of the public was investigated.

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Section: Determination Of Annual Committed Equivalent Dosesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling of the Distribution of Radon and Its Decay in a Traditional Hammam: Dose to Adult Members of the Public

Rabi¹,

Oufni²,

Youssoufi³

et al. 2021

AJEP

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show abstract

“…In this study, Fluent 6.2 software has been utilized to solve the set of equations introduced in the previous section. In numerical solution, the SIMPLE algorithm was used to correct the pressure-velocity decoupling and second order discretization method was applied for convection terms [13].…”

Section: Numerical Solution and Boundary Conditionsmentioning

confidence: 99%

CFD Modelling of Radiation Exposure from Inhalation of Radon Decay Products During Showering

Rabi¹,

Oufni²,

Cheikh³

et al. 2021

RST

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Radon is the most harmful natural contaminant in the indoor atmosphere of the buildings. The noble gas, after cigarette smoke, is the biggest cause of lung cancer, and today the study of its diffusion, distribution, and concentration around the world has attracted many researchers in the field of radiation protection and environmental health. Typically, output data obtained from traditional methods of measuring radon concentration in indoor buildings is limited to information on the average radon concentration. Although these data are highly valuable in identifying buildings with a high risk of radon, it can be misleading to identify the real danger for residents of these buildings. This study aims to investigate the effects of water temperature and water flow rate on radon concentration and distribution inside the showers. Numerical simulations were conducted using CFD. Also, radon concentration in water was determined by the radon detector AlphaGUARD and is used as input in CFD simulation. The results showed that variations in the water flow rate have more influence on radon distribution than the changes in water temperature. Experiments were performed by measuring radon concentrations at different times in the shower room using monitor Radon Scout Plus. The annual effective dose of radon concentration in the shower room was also investigated.

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“…Computational Fluid Dynamics (CFD) has recently been used as a useful method for simulating 222Rn and 220Rn properties in indoor air [7][8][9][10]. Furthermore, research into the prediction of indoor radon distribution and the performance of ventilation systems in reducing radon [11][12][13]. But, a major limitation of these studies is not taking into account the influence the exhalation of radon from the water.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation of Radon Dispersion in Typical Ventilation Schemes of Bathroom

Rabi¹,

Oufni²,

Youssoufi³

et al. 2021

IJDNE

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Human exposure to radon indoor air has become a great concern. Using the Computational Fluid Dynamics (CFD) technique, we investigated the efficiency of ventilation systems for indoor radon reduction. In order to optimize ventilation for the bathroom, we applied the impact of ventilation on radon distribution in the bathroom, in which we characterized airflow and radon level regulation in the ventilated space. Radon Scout Plus is used to measure radon amounts in the bathroom as part of the validation process. The simulation results are consistent with the experimental outcomes. In addition, the annual effective dosage of Radon in the bathroom has been calculated.

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CFD based simulation of thoron (220Rn) concentration in a delay chamber for mitigation application

Cited by 33 publications

References 9 publications

Modeling of the Distribution of Radon and Its Decay in a Traditional Hammam: Dose to Adult Members of the Public

Modeling of the Distribution of Radon and Its Decay in a Traditional Hammam: Dose to Adult Members of the Public

CFD Modelling of Radiation Exposure from Inhalation of Radon Decay Products During Showering

Numerical and Experimental Investigation of Radon Dispersion in Typical Ventilation Schemes of Bathroom

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