scholarly journals Glass implanted 210 Po as a method of defining long-term retrospective exposure to radon: First experiments in Israel

2021 ◽  
Author(s):  
Moshe Shirav ◽  
Gustavo Haquin
Keyword(s):  
Radon Concentration ◽  
Latency Period ◽  
Epidemiological Studies ◽  
Decay Products ◽  
Radon Decay ◽  
Glass Surfaces ◽  
Radon Measurements ◽  
Radon Concentrations

In most epidemiological studies, contemporary radon measurements are used as a proxy for radon concentrations during the latency period even though extreme changes in radon levels may have occurred. Airborne radon decay products are deposited and implanted through alpha recoil into exposed glass surfaces, providing a measure of time-integrated retrospective radon concentration in the environment in which the glass has been located.

scholarly journals Long-Term Impacts of Weather Conditions on Indoor Radon Concentration Measurements in Switzerland

Atmosphere ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 92
Author(s):  
Joan Frédéric Rey ◽  
Stéphane Goyette ◽  
Mauro Gandolla ◽  
Martha Palacios ◽  
Fabio Barazza ◽  
...  
Keyword(s):  
Radon Concentration ◽  
Indoor Radon ◽  
Weather Conditions ◽  
Indoor Environments ◽  
Indoor Radon Concentration ◽  
Prone Area ◽  
Building Characteristics ◽  
Study Sites ◽  
Radon Measurements

Radon is a natural and radioactive gas that can accumulate in indoor environments. Indoor radon concentration (IRC) is influenced, among other factors, by meteorology, which is the subject of this paper. Weather parameters impact indoor radon levels and have already been investigated, but rarely in Switzerland. Moreover, there is a strong need for a better understanding of the radon behaviour inside buildings in Switzerland for public health concerns as Switzerland is a radon prone area. Based on long-term, continuous, and hourly radon measurements, radon distributions classified according to different weather event definitions were investigated and then compared at three different study sites in Western Switzerland. Outdoor temperature influences the most indoor radon, and it is globally anti-correlated. Wind influences indoor radon, but it strongly depends on intensity, direction, and building characteristics. Precipitation influences periodically indoor radon levels relatively to their intensity. Atmospheric pressure and relative humidity do not seem to be huge determinants on IRC. Our results are in line with previous findings and provide a vivid example in Western Switzerland. This paper underlines the different influence complexities of radon, and the need to communicate about it within the broader public and with construction professionals, to raise awareness.

scholarly journals Radon measurements with CR-39 track detectors at specific locations in Turkey

2004 ◽  
Vol 19 (1) ◽  
pp. 46-49 ◽  
Author(s):  
Asiye Ulug ◽  
Melek Karabulut ◽  
Nilgün Celebi
Keyword(s):  
Radon Concentration ◽  
Indoor Radon ◽  
Active Faults ◽  
Indoor Radon Concentration ◽  
Arithmetic Means ◽  
Radon Measurements ◽  
New Buildings ◽  
Main Factor ◽  
Ventilation Conditions ◽  
Radon Concentrations

Indoor radon concentration levels at three sites in Turkey were measured using CR-39 solid state nuclear track detectors. The annual mean of radon concentration was estimated on the basis of four quarter measurements at specific locations in Turkey. The measuring sites are on the active faults. The results of radon measurements are based on 280 measurements in doors. The annual arithmetic means of radon concentrations at three sites (Isparta Egirdir, and Yalvac) were found to be 164 Bqm?3, 124 Bqm?3, and 112 Bqm?3 respectively, ranging from 78 Bqm?3 to 279 Bqm?3. The in door radon concentrations were investigated with respect to the ventilation conditions and the age of buildings. The ventilation conditions were determined to be the main factor affecting the in door radon concentrations. The in door radon concentrations in the new buildings were higher than ones found in the old buildings.

scholarly journals Radon intercomparison tests – Katowice, 2016

Nukleonika ◽  
2020 ◽  
Vol 65 (2) ◽  
pp. 127-132
Author(s):  
Stanisław Chałupnik ◽  
Krystian Skubacz ◽  
Małgorzata Wysocka ◽  
Jadwiga Mazur ◽  
Michał Bonczyk ◽  
...  
Keyword(s):  
Environmental Radioactivity ◽  
Measurement Methods ◽  
Energy Concentration ◽  
Mining Institute ◽  
Proficiency Tests ◽  
Radon Gas ◽  
Decay Products ◽  
Radon Decay ◽  
Passive Techniques ◽  
Radon Concentrations

AbstractAt the beginning of the year 2016, the representatives of the Polish Radon Centre decided to organize proficiency tests (PTs) for measurements of radon gas and radon decay products in the air, involving radon monitors and laboratory passive techniques. The Silesian Centre for Environmental Radioactivity of the Central Mining Institute (GIG), Katowice, became responsible for the organization of the PT exercises. The main reason to choose that location was the radon chamber in GIG with a volume of 17 m3, the biggest one in Poland. Accordingly, 13 participants from Poland plus one participant from Germany expressed their interest. The participants were invited to inform the organizers about what types of monitors and methods they would like to check during the tests. On this basis, the GIG team prepared the proposal for the schedule of exercises, such as the required level(s) of radon concentrations, the number and periods of tests, proposed potential alpha energy concentration (PAEC) levels and also the overall period of PT. The PT activity was performed between 6th and 17th June 2016. After assessment of the results, the agreement between radon monitors and other measurement methods was confirmed. In the case of PAEC monitors and methods of measurements, the results of PT exercises were consistent and confirmed the accuracy of the calibration procedures used by the participants. The results of the PAEC PTs will be published elsewhere; in this paper, only the results of radon intercomparison are described.

scholarly journals Mathematical Expressions of Radon Measurements

2020 ◽  
Author(s):  
Ali Farhan Nader Alrekabi
Keyword(s):  
Radon Concentration ◽  
Transmission Factor ◽  
Air Atmosphere ◽  
Mathematical Expressions ◽  
Radon Diffusion ◽  
Radon Measurements ◽  
Mathematical Relationships ◽  
The Relationship ◽  
Thorium 232

The measurement of radon, thoron and their progeny concentrations also leads to the knowledge of the presence of radioactive elements, which are the sources of these elements such as Uranium-238 and Thorium-232. Using of Solid State Nuclear Tracks Detectors (SSNTDs) it is probably the most widely applied for long term radon measurements. In this chapter, we derived the most important mathematical relationships that researchers need in radon measurements to calculate such as average radon concentration, exhalation rate, equilibrium factor, radon diffusion coefficient and transmission factor to get actual radon concentration in air atmosphere. The relationship between theoretical and experiment calibration drive and other mathematical relationships are given in this chapter.

OCCUPATIONAL EXPOSURE ASSESSMENT AT A THERAPEUTIC RADON SPA FACILITY IN HUNGARY

2019 ◽  
Vol 184 (3-4) ◽  
pp. 470-473 ◽  
Author(s):  
Norbert Kavasi ◽  
Anita Csordas ◽  
Katalin Nagy ◽  
Silvana Beltran ◽  
Dafina Kikaj ◽  
...  
Keyword(s):  
Occupational Exposure ◽  
Radon Concentration ◽  
Temporal Variations ◽  
Factor Level ◽  
Consultation Room ◽  
Decay Products ◽  
Radon Decay ◽  
Effective Doses ◽  
Different Levels ◽  
Rheumatic Patients

Abstract In order to estimate occupational exposure of workers in a therapeutic radon spa facility, radon concentration in the workplace air was investigated at Markhot Ferenc Hospital, Eger, Hungary. The investigated balneotherapeutic facility and its natural hot spa water are used for treatments and rehabilitations of rheumatic patients. Radon concentration, radon decay products at a bathhouse, treatment rooms and a consultation room were continuously measured in August and September 2018. In the present study, different levels of radon concentration among the observation sites and its clear temporal variations were found, though radon concentrations in the investigated sites were below 300 Bq m−3. Regarding such radon fluctuation and low equilibrium factor level (0.1), the annual effective doses of workers are estimated to be around 0.5 mSv year−1.

Long-Lived Radon Decay Products as a Long-Term Radon Exposure Indicator

1994 ◽  
Vol 56 (1-4) ◽  
pp. 123-126 ◽  
Author(s):  
C. Samuelsson ◽  
L. Johansson
Keyword(s):  
Indoor Radon ◽  
Radon Exposure ◽  
Decay Products ◽  
Decay Series ◽  
Radon Diffusion ◽  
Radon Daughter ◽  
Radon Decay ◽  
Low Activity ◽  
Long Term Studies

Abstract The different members of the uranium decay series have distinct roles to play in the scenario of indoor radon. The 222Rn gas is the airborne carrier of the dose giving short-lived decay products. These transform into long-lived daughters (LRnD) of low activity, useful as retrospective radon tracers. Porous objects constitute volume traps for LRnD via radon diffusion, while surfaces trap LRnD through alpha recoil implantation. Only when the build-up of LRnD activity proceeds undisturbed over many years, do we have a system which is potentially useful for retrospective radon/radon daughter exposure studies. The feasibility of using LRnD in humans and in volume and surface traps as radon retrospective monitors is discussed. It is concluded that only surface implantation sinks are potentially well suited for long-term studies at radon levels met in dwellings.

INDOOR RADON MEASUREMENTS FOR THE SOUTH AFRICAN WEST COAST PENINSULA

2020 ◽  
Vol 191 (2) ◽  
pp. 144-149
Author(s):  
Rikus le Roux ◽  
Jacques Bezuidenhout ◽  
Hennie Smit
Keyword(s):  
South Africa ◽  
South African ◽  
West Coast ◽  
Radon Concentration ◽  
Recent Article ◽  
Indoor Radon ◽  
The West ◽  
High Concentrations ◽  
Radon Measurements ◽  
Radon Concentrations

Abstract Granite commonly contains high concentrations of uranium, with consequent high exhalation of radon. The geology of the West Coast peninsula of South Africa is dominated by granite, and a recent article predicted potentially high indoor radon concentrations in this region’s two largest towns, Vredenburg and Saldanha. This research aimed to measure indoor radon levels in these towns. Measurements were first done for a minimum of 3 d during warmer months, with houses typically being more ventilated. Thirty-four homes in Vredenburg and 27 in Saldanha were measured, and the average indoor radon determined to be 40 and 58 Bq m−3, respectively. The measurements were then repeated during the colder months, and an increase in average radon concentration of 173 Bq m−3 for Saldanha and 153 Bq m−3 for Vredenburg was found. The granite geology and lifestyle of occupants during the colder months seem to contribute towards elevated levels of indoor radon concentrations.

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