The Determination of Radon/Thoron Exhalation Rate in an Underground Coal Mine—Preliminary Results

Bonczyk, Michał; Chałupnik, Stanisław; Wysocka, M.; Grygier, Agata; Hildebrandt, Robert; Tosheva, Z.

doi:10.3390/ijerph19106038

Cited by 7 publications

(3 citation statements)

References 33 publications

(42 reference statements)

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“…Measurements of radon exhalation rate contribute to the determination of factors and mechanisms that potentially cause radon release. By studying different materials, soil types, and environmental conditions, the fundamental causes of radon release can be revealed [18]. This information is crucial for the development and optimization of preventive and control measures against radon contamination.…”

Section: Introductionmentioning

confidence: 99%

A novel method to simulate radon exhalation rate with a solid Rn-222 source

Li,

Fan,

Liu

et al. 2024

J. Inst.

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Radon exhaled from rocks, building materials, and soil can be harmful to human health, so it is necessary to measure radon and its exhalation rate. In this paper, a novel method is proposed to simulate radon exhalation from different medium surface by using a solid Rn-222 source, and the radon exhalation rate can be adjusted by replacing radon accumulation chambers with different bottom areas. Firstly, an experiment was done to determine the activity of the Rn-222 source, and then the theoretical radon exhalation rate can be quickly calculated from the relationship between the radon source activity and the bottom area of the radon accumulation chamber. Three sets of comparative experiments were conducted using two radon accumulation chambers with different volumes, respectively. Comparing the average values obtained from the experiments with the calculated theoretical values, it can be obtained that the differences corresponding to the two radon accumulation chambers between the theoretical radon exhalation rates and the experimentally average values are all within 6%. Without replacing the radon source, the radon exhalation rate is inversely varies with the bottom area of the chamber. Therefore, the correctness of adjusting the radon exhalation rate by replacing radon accumulation chambers with different bottom areas to simulate radon exhalation from different media surfaces is verified. This method can be used to calibrate the radon exhalation measuring instruments.

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Section: Introductionmentioning

confidence: 99%

A novel method to simulate radon exhalation rate with a solid Rn-222 source

Li,

Fan,

Liu

et al. 2024

J. Inst.

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“…In [29], radon and thoron emanation in a coalmine was monitored. No relation to pressure has been established, and to explain the observed increase in radon emanation, the authors suggested that the only reason for a high radon release was severe damage caused to a rock mass.…”

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confidence: 99%

Radon Emanation and Dynamic Processes in Highly Dispersive Media

Zaalishvili,

Melkov,

Martyushev

et al. 2024

Geosciences

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The paper considers a dispersive geological medium (seismically turbid medium, as defined by A.V. Nikolaev), which is in a stress–strain state. Results of studies on the joint monitoring of seismic effects and radon emanation in various geological environments are presented. It is concluded that the turbidity of the medium, as a statistical characteristic, can be generalized in terms of other media parameters, such as permeability. A stable connection between radon emanation and dynamic processes occurring in a geological environment and caused by external influences has been established. The concentration of radon can also reflect the degree of enrichment of the environment by underground fractures. Consequently, saturation of the environment with radon provides information about the presence of disturbances in a geological environment in the form of cracks and a stress–strain state of the medium before and after seismic loadings. Radon observations make it possible to assess a continuity of the environment and the possibility of leaching in natural conditions. Therefore, it could be efficiently used for underground leaching efficiency assessment.

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“…Bonczyk et al [ 11 ] presented a series of measurements of radon and thoron exhalation in the underground workings of an experimental coal mine to assess the radiation hazard to miners. Their preliminary experimental results showed a significant increase in radon levels, which may be related to the proximity of a former underground coal gasification (UCG) reactor for hydrogen production, where experiments had been conducted several years earlier.…”

mentioning

confidence: 99%