Relationship between deposition and attachment rates in Jacobi room model

Stevanović, N.; Markovic, V.M.; Nikezić, D.

doi:10.1016/j.jenvrad.2010.02.002

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…The average calculated attachment rate coefficient is greater than 0.005 cm 3 h −1 as reported by Porstendorfer 43 and almost equal to 1.45 × 10 −9 m 3 h −1 given by Stevanovic et al . 44 . The average estimated F Rn , X Rn and β are concerned as per the values given by other investigators in Table 4.…”

Section: Resultsmentioning

confidence: 99%

Quantification of an alpha flux based radiological dose from seasonal exposure to 222Rn, 220Rn and their different EEC species

Bangotra

Mehra

Jakhu

et al. 2019

Sci Rep

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This study summarizes the seasonal experimental data on the activity concentrations of indoor 222 Rn (Radon), 220 Rn (Thoron) and their progeny in Mansa and Muktsar districts of Punjab (India) using LR-115 solid state nuclear track detector based time integrated pin-hole cup dosimeters and deposition based progeny sensors for the assessment of radiological dose. The indoor 222 Rn concentration was observed higher in the rainy and winter seasons while 220 Rn concentration was observed higher in the winter season. However, Equilibrium Equivalent Concentrations (EECs) of 222 Rn and 220 Rn exhibited distinct seasonal behaviour unlike their parent nuclides. The average equilibrium factors for 222 Rn (F Rn ) and 220 Rn (F Tn ) were found 0.47 ± 0.1 and 0.05 ± 0.01, respectively. The annual arithmetic means of unattached fractions of 222 Rn ( ) and 220 Rn ( ) were found to be 0.09 ± 0.02 and 0.10 ± 0.02, respectively. The attachment rate ( X Rn ) and attachment rate coefficients ( β ) of 222 Rn progeny were also calculated to understand the proper behaviour of progeny species in the region. A new alpha flux based technique has been proposed and used for the assessment of absorbed dose rate and annual effective dose rate for radiation protection purpose.

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Section: Resultsmentioning

confidence: 99%

Quantification of an alpha flux based radiological dose from seasonal exposure to 222Rn, 220Rn and their different EEC species

Bangotra

Mehra

Jakhu

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The charging process depends on the electric charge distribution of an aerosol in steady state. In most used theories, attachment is diffusion-controlled as a result of electrostatic attraction and follows the gas kinetic laws [20][21][22]. The expression of the rate constant for attachment can be written as follows:…”

Section: Parameters In the Jacobi Room Modelmentioning

confidence: 99%

An Improved Passive CR-39-Based Direct 222Rn/220Rn Progeny Detector

Jun

Yang

Kranrod

et al. 2020

IJERPH

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An improved passive CR-39-based direct 222Rn/220Rn progeny detector with 3 detection channels was designed and tested in this study to measure and calculate equilibrium equivalent concentration (EEC) of both 222Rn and 220Rn without the equilibrium factor. A theoretical model was established to calculate the EEC with optimization. Subsequently, an exposure experiment was carried out to test the performance of this detector, and we compared the chamber experiment and the theoretical model by estimating and measuring various parameters. The deposition flux of progeny derived from the prediction agreed well with the value measured in the exposure chamber. The energy-weighted net track density (NTD) measured by this detector is much more reliable to reflect the linear relation between NTD and time-integrated EEC. Since the detector is sensitive to the exposure environmental condition, it is recommended to apply the detector to measure the EEC after its calibration in a typical indoor environment.

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“…The attachment rate, which is a function of time, has been evaluated through the linear relationship proposed by (Porstendörfer, 1994;Stevanovic et al, 2010):…”

Section: Attachment Ratex Rmentioning

confidence: 99%

Development of an electrostatic precipitator prototype to reduce exposure to radon progeny in poorly ventilated workplaces

Colenghi

Lepore

Carlo

et al. 2020

Journal of Radiation Research and Applied Sciences

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Electrostatic precipitation is a well-known technology to reduce public exposure to radon daughters. A custom electrostatic precipitator (ESP) prototype has been designed and built to study the effectiveness of such a removal technique in specific workplaces having low-to-zero air exchange rates with external environments. An appropriate mathematical model has been set up in order to simulate the behavior of environmental and nuclear data throughout the ESP operation, to optimize the design for the prototype to be built, to estimate its effectiveness in terms of effective dose reduction. Reference detectors have been used to measure both the radon concentration and the potential alpha energy concentration of its decay products. After a full calibration procedure, two main experiments have been performed in a room satisfying the requirements of very low ventilation rate and high radon concentration. The effective dose rate after an ESP continuous working period of either 3 h or 5 h turned out to be 50% lower than the value measured before ESP switching ON. The main contribution to dose reduction was found to be given by the first 2 hours of operation.

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Relationship between deposition and attachment rates in Jacobi room model

Cited by 8 publications

References 11 publications

Quantification of an alpha flux based radiological dose from seasonal exposure to 222Rn, 220Rn and their different EEC species

Quantification of an alpha flux based radiological dose from seasonal exposure to 222Rn, 220Rn and their different EEC species

An Improved Passive CR-39-Based Direct 222Rn/220Rn Progeny Detector

Development of an electrostatic precipitator prototype to reduce exposure to radon progeny in poorly ventilated workplaces

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