Further studies on ageing and fading of CR39 PADC track detectors used as air radon concentration measurement devices

Caresana, M.; Ferrarini, M.; Garlati, L.; Parravicini, A.

doi:10.1016/j.radmeas.2011.07.040

Cited by 15 publications

(5 citation statements)

References 3 publications

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“…It was chosen a single exposure period of about 1 year considering that these CR-39 detectors (and their measurement techniques) do not show an appreciable sensitivity decrease due to ageing and fading effects. (8)…”

Section: Radon Measuring Systemmentioning

confidence: 99%

Spatial Variability of Indoor Radon Concentration in Schools: Implications on Radon Measurement Protocols

Ćurguz

Venoso

Žunić

et al. 2020

Radiation Protection Dosimetry

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The requirements about radon measurements in schools and public buildings included in most of the national and international legislations are generally restricted to all the rooms located at the ground floor and basement, assuming the soil beneath the building as the main source of indoor radon. In order to verify such an assumption for small buildings having at maximum two floors, a preliminary study was performed in 50 schools located in 15 municipalities of the Republic of Srpska. Results of this study suggest that a protocol requiring measurements at the ground floor only may be considered adequate. Due to the high radon spatial variability for rooms at the ground floor, it is preferable to require measurements in a high number of rooms (preferably in all of them) in order to assess the compliance with the reference level established by the legislation.

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Section: Radon Measuring Systemmentioning

confidence: 99%

Spatial Variability of Indoor Radon Concentration in Schools: Implications on Radon Measurement Protocols

Ćurguz

Venoso

Žunić

et al. 2020

Radiation Protection Dosimetry

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“…In one of these studies, Caresana et al (2010) have developed a compensation algorithm which, for CR-39 produced by TASL Ltd (Bristol, UK), allowed the bias due to A&F to be reduced from values of about 40% to values of less than 5%. In another study, using the same read-out system for another type of CR-39 detector (by Intercast Spa, Parma, Italy), Caresana et al (2011) found a lower impact of A&F, i.e. a reduction of 7% for 6 month measurements.…”

Section: Discussionmentioning

confidence: 88%

In-field evaluation of the impact of ageing and fading effects on annual radon concentration measurements for two different techniques

et al. 2016

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Measurements covering a 1 year period are often used and required by legislation to assess the average radon concentration within a house or a workplace. This kind of long-term measurement-generally carried out with techniques based on nuclear track detectors-can be affected by a reduction in sensitivity due to ageing and fading of latent tracks during the exposure period, thus resulting in an underestimation of the actual average concentration. In order to evaluate in field conditions the ageing and fading effects on annual radon concentration measurements, two different studies in a large sample of rooms in dwellings (162) and in workplaces (432) were conducted using two different techniques (detector and track read-out system): (i) CR-39 plastics readout with a fully automated image analysis system, and (ii) LR 115 films with a spark-counter for track counting. Study design and data analysis aimed to evaluate both the average and the variability of ageing and fading effects in real conditions, and to reduce and separate the contribution of measurement uncertainty to the observed variability. For the CR-39 based technique, the results show that radon concentration measurements over a 12month period are on average about 16% lower than those evaluated with measurements of two consecutive 6 month periods, implying the need for a correction factor to avoid measurement bias (i.e. underestimation) due to ageing and fading effects. The observed variability of ageing and fading effects among the sampled rooms is not negligible (coefficient of variation about 18%), although a considerable fraction is attributable to measurement uncertainty, which is presumably not related to ageing and fading. For the technique based on LR 115 spark counting, ageing and fading do not significantly affect the results of radon concentration measurement.

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“…that CR-39 detectors by different manufacturers may have different response (Caresana et al, 2011(Caresana et al, , 2010. Also, Franci et al (2015) found that the sensitivity of CR-39 detectors (manufactured by Radosys, Ltd) continuously exposed in a reference radon chamber at room temperature over 3 and 6 months reduced by 4 and 7.5%, respectively.…”

Section: Effect Of Long-time Sampling -Analysis Of Results Of Test 1 and Testmentioning

confidence: 99%

Main results of the second AIRP international radon-in-field intercomparison for passive measurement devices

Berlier¹,

Cardellini

Chiaberto³

et al. 2019

Radiation Measurements

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Further studies on ageing and fading of CR39 PADC track detectors used as air radon concentration measurement devices

Cited by 15 publications

References 3 publications

Spatial Variability of Indoor Radon Concentration in Schools: Implications on Radon Measurement Protocols

Spatial Variability of Indoor Radon Concentration in Schools: Implications on Radon Measurement Protocols

In-field evaluation of the impact of ageing and fading effects on annual radon concentration measurements for two different techniques

Main results of the second AIRP international radon-in-field intercomparison for passive measurement devices

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