Radon activity concentration—a Euromet and BIPM supplementary comparison

Röttger, A.; Honig, A.; Schmidt, V.; Buchröder, H.; Rox, A.; Butterweck, Gernot; Schuler, Ch.; Maringer, Franz Josef; P, Jachs; Edelmaier, Robert; Michielsen, N.; Howarth, Christopher; Miles, J.C.H.; Vargas, Arturo; Ortega, X.; Burian, I.; Turtiainen, Tuukka; Hagberg, N.

doi:10.1016/j.apradiso.2006.02.086

Cited by 17 publications

(13 citation statements)

References 5 publications

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“…Laboratory facilities offer stationary and controlled conditions of gas ionization associated with the choice of different gas pressures and types of injected gas. In the BACCARA chamber of the Institute of Radioprotection and Nuclear Safety (IRSN), the established 222 Rn activity concentrations are traceable to a primary 222 Rn gas standard [ Michielsen and Voisin , ; Picolo et al ., ; Röttger et al ., ].…”

Section: Introductionmentioning

confidence: 69%

“…• New design of instrument to measure electric conductivity of air in high and variable electric field is proposed (Mars application) • Performances of new instrument to measure electric conductivity of air were tested in 222 Rn-rich environments • An analytical model is proposed with intention to explain the measured values of the air electric conductivity at different gas pressures and types of injected gas. In the BACCARA chamber of the Institute of Radioprotection and Nuclear Safety (IRSN), the established 222 Rn activity concentrations are traceable to a primary 222 Rn gas standard [Michielsen and Voisin, 1999;Picolo et al, 2000;Röttger et al, 2006].…”

Section: 1002/2016ea000241mentioning

confidence: 99%

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What we can learn from measurements of air electric conductivity in ²²²Rn‐rich atmosphere

Seran

Godefroy

Pili

et al. 2017

Earth and Space Science

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Electric conductivity of air is an important characteristic of the electric properties of an atmosphere. Testing instruments to measure electric conductivity ranging from~10 −13 to 10 −9 Sm −1 in natural conditions found in the Earth atmosphere is not an easy task. One possibility is to use stratospheric balloon flights; another (and a simpler one) is to look for terrestrial environments with significant radioactive decay. In this paper we present measurements carried out with different types of conductivity sensors in two 222 Rn-rich environments, i.e., in the Roselend underground tunnel (French Alps) and in the Institute of Radioprotection and Nuclear Safety BACCARA (BAnC de CAllibrage du RAdon) chamber. The concept of the conductivity sensor is based on the classical time relaxation method. New elements in our design include isolation of the sensor sensitive part (electrode) from the external electric field and sensor miniaturization. This greatly extends the application domain of the sensor and permits to measure air electric conductivity when the external electric field is high and varies from few tens of Vm −1 to up to few tens of kVm −1 . This is suitable to propose the instrument for a planetary mission. Two-fold objectives were attained as the outcome of these tests and their analysis. First was directly related to the performances of the conductivity sensors and the efficiency of the conductivity sensor design to shield the external electric field. Second objective aimed at understanding the decay mechanisms of 222 Rn and its progeny in atmosphere and the impact of the enclosed space on the efficiency of gas ionization.

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Section: Introductionmentioning

confidence: 69%

Section: 1002/2016ea000241mentioning

confidence: 99%

What we can learn from measurements of air electric conductivity in ²²²Rn‐rich atmosphere

Seran

Godefroy

Pili

et al. 2017

Earth and Space Science

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“…The high activity runs are performed with purified air + radon (constant activity concentration). In this configuration, the BACCARA equilibrium factor is of about 0.1 (Roëttger et al, 2006).…”

Section: High Activity Monitoring Of 222 Rnmentioning

confidence: 94%

“…Specialized in the aerosols involved in 222 Rn decay products, this laboratory is equipped with the BACCARA testing facility (Roëttger et al, 2006) (http://www.irsn.org/index.php?position = prestation_f5). This bench can provide any 222 Rn activity concentration up to 1 MBq m −3 inside a 1 m 3 vessel (Roëttger et al, 2006). The radon chamber can be used either in the decay mode or with a constant concentration of 222 Rn.…”

Section: High Activity Monitoring Of 222 Rnmentioning

confidence: 99%

Measurement of 222Rn at the level with the AlphaRad chip

Higueret¹,

Husson²,

Trocmé³

et al. 2008

Radiation Measurements

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“…The TMDs devices were exposed in participants' measuring systems at two to three different activity concentrations (low, middle, high) depending on the limiting operation conditions in each individual laboratory within the range of 500-5000 Bq m −3 for Rn and 300-13,000 Bq m −3 for Tn. Similar procedure for Rn was carried out in Europe described elsewhere [3].…”

Section: Comparison Proceduresmentioning

confidence: 99%

Comparison of Radon and Thoron Concentration Measuring Systems Among Asian Countries

Janik

Tokonami

Iwaoka

et al. 2019

IJERPH

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Comparison is an important role in the quality control and quality assurance for any measuring system. Due to the future legal regulations regarding radon levels in the air, maintaining the system quality and harmonization of results as well as validation of radon and thoron measuring systems is important. The aim of this work is to validate the degrees of equivalence and measurement precisions of the existing five radon and four thoron measuring systems located in four Asian countries (China, India, Japan and Thailand) through comparison experiment. In this project, comparison experiment was performed in order to derive the ratio between assigned value obtained from one transfer measurement device for radon and one transfer measurement device for thoron belongs to National Institutes for Quantum and Radiological Science and Technology and participants’ value from their measuring instrument. As a result, the ratio value associated with measurement uncertainty was derived for each activity concentration. Finally, measurement bias and degrees of equivalence between the assigned values and values of measurement quantity from participants’ measuring instruments were statistically analysed and presented.

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Radon activity concentration—a Euromet and BIPM supplementary comparison

Cited by 17 publications

References 5 publications

What we can learn from measurements of air electric conductivity in ²²²Rn‐rich atmosphere

What we can learn from measurements of air electric conductivity in ²²²Rn‐rich atmosphere

Measurement of 222Rn at the level with the AlphaRad chip

Comparison of Radon and Thoron Concentration Measuring Systems Among Asian Countries

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Radon activity concentration—a Euromet and BIPM supplementary comparison

Cited by 17 publications

References 5 publications

What we can learn from measurements of air electric conductivity in 222Rn‐rich atmosphere

What we can learn from measurements of air electric conductivity in 222Rn‐rich atmosphere

Measurement of 222Rn at the level with the AlphaRad chip

Comparison of Radon and Thoron Concentration Measuring Systems Among Asian Countries

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Product

Resources

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What we can learn from measurements of air electric conductivity in ²²²Rn‐rich atmosphere

What we can learn from measurements of air electric conductivity in ²²²Rn‐rich atmosphere