Готові списки джерел за темами / 222Rn Concentration

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Добірка наукової літератури з теми "222Rn Concentration"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "222Rn Concentration"

Wang, Nanping, Ling Zheng, Xingming Chu, Shijun Li, and Shouliang Yan. "The characteristics of radon and thoron concentration from soil gas in Shenzhen City of Southern China." Nukleonika 61, no. 3 (2016): 315–19. http://dx.doi.org/10.1515/nuka-2016-0052.

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Abstract Radon (222Rn) and thoron (220Rn) from soil gas are very significant factors that can affect the indoor radon level in the first floor or in the basement. China is one of the countries with the highest thorium content in the world. Therefore, it is very significant to study 222Rn/220Rn concentration in the soil in Shenzhen City (SC). A 222Rn/220Rn survey was performed using a portable radon monitor (model RAD7) at 69 sites, covered a total area of 1800 km2 in 2013 to get the original data for radon risk estimation in SC. The average values of 222Rn and 220Rn concentration of soil gas o

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Sharma, S., A. Kumar, R. Mehra, and R. Mishra. "ASSESSMENT OF DOSE DUE TO AMBIENT Rn222/Rn220 PROGENY IN DIFFERENT DWELLINGS OF JAMMU AND KASHMIR STATE, INDIA." Radiation Protection Dosimetry 188, no. 2 (2019): 162–73. http://dx.doi.org/10.1093/rpd/ncz271.

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Abstract The un-attached part of radon (222Rn) progeny is one of the imperative variables for the definitive evaluation of the effective dose from the radon exposure perspective, and it might fluctuate enormously in various ecological conditions. Therefore, estimate dispersion of 222Rn/220Rn progeny, un-attached part and aerosol concentration was estimated in an indoor domain of Jammu and Kashmir State, India utilizing progeny deposition based sensors. Distinctive sorts of residence were picked up for this exploratory examination and maximum 222Rn and thoron (220Rn) descendants concentration w

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Odongo, Willis Otieno Gor, Margaret Chege, Shinji Tokonami, Nadir Hashim, Chutima Kranrod, and Catherine Nyambura. "RADON AND THORON EXHALATION RATES FROM EARTHEN BUILDING MATERIALS USED IN HIGH BACKGROUND RADIATION AREAS OF HOMA AND RURI, KENYA." Radiation Protection Dosimetry 197, no. 1 (2021): 12–18. http://dx.doi.org/10.1093/rpd/ncab156.

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Abstract 222Rn and 220Rn surface exhalation rates from earthen building materials used in high background radiation areas of Homa and Ruri, Kenya have been measured using an accumulation chamber coupled with RAD7 detector. Activity concentrations of 226Ra and 232Th in the building materials were determined by γ-ray spectroscopy. In Homa the average 222Rn surface exhalation was 1 ± 0.1 mBqm−2 s−1, while that of 220Rn was 18 ± 2 Bqm−2 s−1; in Ruri 222Rn was 0.9 ± 0.1 mBqm−2 s−1 and 220Rn was 25 ± 3 Bqm−2 s−1. 222Rn was 26 times lower than world average and 220Rn was higher by a factor of 21. Ave

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Kowalska, Agata, Elżbieta Domin, and Tadeusz A. Przylibski. "Pilot study of 222Rn and 226Ra activity concentrations in groundwaters of Roztocze region, Poland." E3S Web of Conferences 44 (2018): 00077. http://dx.doi.org/10.1051/e3sconf/20184400077.

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Authors selected 5 intakes of groundwaters outflowing from carbonate rocks in Roztocze region in Poland and measured activity concentrations of 222Rn and 222Ra. The average values of 222Rn and 226Ra activity concentrations were: 5.3 (min. 2.0, max. 8.3 Bq/dm3) and 0.06 Bq/dm3 (from <0.06 to 0.07 Bq/dm3) respectively. To make a comparison authors made also investigations in groundwaters from other regions built of carbonate rocks in Poland (Sudetes, Kraków-Częstochowa Upland, Lublin Upland, Tatra Mountains). In groundwaters from these regions, 222Rn activity concentration was from 2.2 to 47.

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Dosh, Rukia Jabar, Qusay Bassim Muhamad, and Ali Abid Abojassim. "Dose assessment for radon and thoron concentrations in iraqi thermostone bricks." E3S Web of Conferences 452 (2023): 06029. http://dx.doi.org/10.1051/e3sconf/202345206029.

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This research aims to measure radon (222Rn) and thoron (220Rn) concentrations for selected thermostone bricks samples produced in Iraq. 222Rn and 220Rn concentrations were measured using the active method (RAD7 detector). Also, the inhalation dose for the year was calculated using the 222Rn and 220Rn concentrations. The results of this study indicated that the range of radon concentration values was between 8.00 Bq/m3 to 66.50 Bq/m3; its mean value was 28.22±3.89 Bq/m3. At the same time, the values of thoron concentrations ranged from 27.10 Bq/m3 to 129.00 Bq/m3, with a mean value of 55.46±7.1

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Mehra, Rohit, Rajan Jakhu, and HM Mittal. "Assessment of lung dose from indoor 222Rn and 220Rn exposure in the Jalandhar and Kapurthala districts of Punjab, India." Indoor and Built Environment 26, no. 9 (2015): 1305–10. http://dx.doi.org/10.1177/1420326x15613559.

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Radon (222Rn) and its progenies are the main source of the inhalation dose received by humans due to natural radioactivity. Residential houses of different villages of Jalandhar and Kapurthala districts of Punjab, India, were chosen for the present study. An attempt has been made to estimate the dose to lung (DRL) due to indoor 222Rn concentration. The results of observed values of dose rate to lung ( Dlung), dose to tracheo-bronchial region ( DT-B), dose to pulmonary + pulmonary lymph region ( DP+PL), dose to lung ( DRL) from 222Rn exposure and dose to lung ( DTL) from indoor Thoron (220Rn) e

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Sivakumar, R. "Variability of radon and thoron concentration with type of dwellings in a hilly area." Indoor and Built Environment 27, no. 1 (2016): 96–108. http://dx.doi.org/10.1177/1420326x16663811.

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Indoor radon, thoron and progenies are major contributors to the indoor radiation dose which have been measured by our study for different types of dwellings during four seasons of a year. The indoor radon, thoron and progeny levels observed in the present study found to vary with seasons of a year. The average highest radon, thoron and progeny were observed during winter and the corresponding lowest values were observed during summer. The highest 222Rn, 220Rn and progenies concentrations were observed in mud houses and the lowest values were recorded in wooden houses. A good correlation with

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Lucchetti, Carlo, Mauro Castelluccio, Matteo Altamore, et al. "Using a scale model room to assess the contribution of building material of volcanic origin to indoor radon." Nukleonika 65, no. 2 (2020): 71–76. http://dx.doi.org/10.2478/nuka-2020-0010.

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AbstractIn the frame of Radon rEal time monitoring System and Proactive Indoor Remediation (RESPIRE), a LIFE 2016 project funded by the European Commission, the contribution of building materials of volcanic origin to indoor radon concentration was investigated. First, total gamma radiation and related outdoor dose rates of geological materials in the Caprarola area (Central Italy) were measured to define main sources of radiation. Second, 222Rn and 220Rn exhalation rates of these rocks used as building materials were measured using an accumulation chamber connected in a closed loop with a RAD

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Abdul Razab, Mohammad Khairul Azhar, Siti Fatimah Abd Karim, Nur Ezati Azhar, et al. "The Effects of Altitude Levels on ²²²Rn Concentration in Academic Building at Universiti Malaysia Kelantan Jeli Campus." Materials Science Forum 888 (March 2017): 466–70. http://dx.doi.org/10.4028/www.scientific.net/msf.888.466.

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Highly continuous exposure to Radon (222Rn) concentrations can affects human health and cause lung cancer. This study aims to briefly monitor 222Rn concentration at different level altitude and to investigate correlation between their environmental parameters sort of temperature, humidity and pressure in indoor space. Lecture rooms known as BK 4 in the first floor and BK 8 in the third floor at academic building Universiti Malaysia Kelantan (UMK) Jeli Campus were selected as the study areas. The total of 210 readings indoor 222Rn concentrations data have been collected for the whole study usin

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Ouzounis, Athanasios, and Ioannis Kaissas. "A Review of Methodologies for Measuring Geogenic Rn Exhalation." HNPS Advances in Nuclear Physics 31 (June 2, 2025): 90–95. https://doi.org/10.12681/hnpsanp.8157.

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Radon (222Rn) and thoron (220Rn) are potential health hazards and therefore their concentration levels have been extensively monitored indoors across Europe resulting in indoor radon concentration maps [1]. Direct in situ measurements of geogenic radon and thoron exhalation are limited to a few locations worldwide while indoor measurements are more common. Potentially hazardous zones for long-term inhabitancy can be characterized, considering spatial geogenic radon exhalation data acquired before any construction activities. Furthermore, atmospheric simulations, earthquake prediction and ident

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Більше джерел

Дисертації з теми "222Rn Concentration"

Lawrence, Cameron Eoin. "Measurement of 222Rn Exhalation Rates and 210Pb Deposition Rates in a Tropical Environment." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16291/1/Cameron_Lawrence_Thesis.pdf.

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This thesis provides the measurements of 222Rn exhalation rates, 210Pb deposition rates and excess 210Pb inventories for locations in and around Ranger Uranium Mine and Jabiru located within Kakadu National Park, Australia. Radon-222 is part of the natural 238U series decay chain and the only gas to be found in the series under normal conditions. Part of the natural redistribution of 222Rn in the environment is a portion exhales from the ground and disperses into the atmosphere. Here it decays via a series of short-lived progeny, that attach themselves to aerosol particles, to the long lived i

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Lawrence, Cameron Eoin. "Measurement of 222Rn Exhalation Rates and 210Pb Deposition Rates in a Tropical Environment." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16291/.

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Частини книг з теми "222Rn Concentration"

Ichiji, T., and T. Hattori. "Continuous measurement of environmental gamma radiation using a Ge semiconductor detector and 222Rn concentration in air." In Radioactivity in the Environment. Elsevier, 2005. http://dx.doi.org/10.1016/s1569-4860(04)07013-5.

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Imaizumi, M., S. Ishida, T. Tsuchihara, and M. Fazal. "Studies on natural and artificial recharge mechanisms in diluvial upland using 222Rn concentration in groundwater as tracer." In Groundwater Engineering - Recent Advances. Taylor & Francis, 2003. http://dx.doi.org/10.1201/9781439833605.ch54.

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"Time-series analysis of radon monitoring in various underground environments: Case of abandoned Kővágószőlős uranium mine." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.43.5.

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Field uranium research began in Hungary in 1947 under the guidance of Hungarian specialists. After the research period, mining plants were opened one after the other, and an ore processing plant was also established. The ore wealth found in the Mecsek Mountains was less favorable than average, 1 ton of ore contained 1.2 kg of uranium metal. By 1989, Hungarian uranium ore mining had become uneconomical, and a government decision was made to close it down, dating back to 1997. The reculturation process began in 1998. Currently, environmental damage is being eliminated under the title of long-ter

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Tadolini, T., M. Spizzico, and D. Sciannamblo. "222Rn concentration variations owing to dynamic condition changes induced in the waters of the Apulian karst aquifer (Southern Italy)." In Tracer Hydrology 97. CRC Press, 2020. http://dx.doi.org/10.1201/9781003078142-16.

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Mahesh, H. M., D. N. Avadhani, and K. Siddappa. "Concentration, distribution and transportation of 222Rn and its decay products in the environment of coastal Karnataka and Kaiga in southwest India." In Radioactivity in the Environment. Elsevier, 2005. http://dx.doi.org/10.1016/s1569-4860(04)07065-2.

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"Isolation of radiation resistant bacteria from radon rich freshwater and uptake assay." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.38.4.

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Recent studies on radiation-resistant microorganisms have integrated classical culture techniques with molecular-level investigations. The isolation and characterization of these microorganisms have gained significant interest in the subfields of medical, evolutionary, environmental, and agricultural microbiology. Radiation-resistant microorganisms can be used as bioremediation agents thanks to their microbial metabolism and resistance mechanisms, such as bioadsorption and bioprecipitation, in contaminated areas or for evolutionary studies. In this study, the activity of Radon-222 (²²²Rn) in g

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"Assessment of Radon concentrations and environmental correlations in public schools of Safi, Morocco: a spatial and statistical analysis." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.35.2.

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Radon, a naturally occurring radioactive gas and the second foremost contributor to lung carcinoma subsequent to tobacco consumption, necessitates systematic surveillance in educational contexts due to the extended exposure hazards for inhabitants. This inquiry, conducted between September 21, 2024, and February 21, 2025, across thirty public educational establishments in Safi, Morocco, evaluated radon (222Rn) concentrations utilizing DSTN LR-115 passive detectors alongside Airthings devices (View Plus and View Radon) for the real-time measurement of radon, temperature, and humidity. The princ

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Тези доповідей конференцій з теми "222Rn Concentration"

Wang, Jin, Juan Liu, Yongheng Chen, et al. "The Complex Influence of Filtration Operation on Indoor 222Rn (radon) and 220Rn (thoron) Concentration." In 2012 Second International Conference on Intelligent System Design and Engineering Application (ISDEA). IEEE, 2012. http://dx.doi.org/10.1109/isdea.2012.731.

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Corrêa, J. N., L. Fior, S. A. Paschuk, et al. "222Rn Indoor Concentration Measurements Related to Construction Materials." In VI LATIN AMERICAN SYMPOSIUM ON NUCLEAR PHYSICS AND APPLICATIONS. AIP, 2007. http://dx.doi.org/10.1063/1.2710643.

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Wang, Lei, Xianguo Tuo, and Chunlai Liu. "Research of Radon Transportation Model to Investigate Buried Fault." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29191.

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How to get the position, direction and width of buried fault effectively is still very difficult when finding buried faults by measuring 222Rn radioactivity. In this paper we established a technique to carry out buried fault investigation. It was based on Fick’s fist law, Darcy’s law and theory of clusters to analyze radon transportation and simulate 222Rn transportation in ideal conditions. The feasibility indicates that measuring or investigating the concentration of radon to find abnormal region can help people find buried faults. 218Po and 214Po, daughter products of 222Rn, are generally c

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Hegedűs, Miklós, Van-Hao Duong, Trung-Tien Chu, et al. "Effect of climate on the 222Rn activity concentration in spring water in a rare earth element and uranium mining areas in North Vietnam." In RAD Conference. RAD Centre, 2022. http://dx.doi.org/10.21175/rad.spr.abstr.book.2022.34.6.

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Borbet, J., J. Veciana, C. Stiels, and R. Schmidt. "Reduction of NORM Waste in the Oil and Gas Industry with Indirect Heated Vacuum Distillation Technology." In ADIPEC. SPE, 2023. http://dx.doi.org/10.2118/215953-ms.

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Abstract One of the most pressing challenges currently in the oil and gas industry is the management of natural occurring radioactive material (NORM) or technologically enhanced NORM (TENORM) containing wastes. The exploration and extraction operations of oil and gas are frequently executed in subsurface formations that contain natural radionuclides such as 226Ra, 228Ra, 222Rn, 210Pb, 40K etc. The natural radioactivity present in the oil and gas extraction sites can be significantly enhanced (&gt;10,000 Bq kg−1) due to technological and human activities creating TENORM waste. TENORM is cau

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Abojassim, Ali Abid, Talib A. Abdulwahid, Rusul Hadi Hashim, Areej Saeed Abdulshaheed, and Hayder Hasan Rajab. "222Rn, 218Po, and 214Po concentrations in blood samples of cancer patients at Najaf and Kufa cities of Al-Najaf Governorate." In 3RD INTERNATIONAL SCIENTIFIC CONFERENCE OF ALKAFEEL UNIVERSITY (ISCKU 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0066829.

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Mallants, Dirk, Diederik Jacques, and Theo Zeevaert. "Modelling 226Ra, 222Rn, and 210Pb Migration in a Proposed Surface Repository of Very Low-Level Long-Lived Radioactive Waste." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4632.

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A generic concept for disposal of very low-level long-lived radioactive waste is currently being evaluated for radium bearing wastes that originated from a historical radium extraction plant at Olen, Belgium. A total volume of approximately 217 000 m3 of waste with an average radium content of 7 Bq/g has to be disposed of. Upon request by the Belgian National Agency for Management of Radioactive Waste and Nuclear Fuels, NIRAS/ONDRAF, a generic disposal concept was evaluated for the purpose of identifying the minimum disposal concept which guarantees long term safety. Such an analysis would pro

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