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3. Measuring radon emissions
Radon gas emanations can be measured using "spot or instantaneous measurements". These involve exposing the dosimeter for a few minutes, then immediately measuring by counting.
This type of analysis is not very meaningful, as it is extremely variable depending on the period of gas activity.
Continuous measurements" produce sampling. They enable simultaneous (or slightly delayed) analysis of temporal variations in volumetric activity over a maximum period of one hour. Integrated" measurements enable the temporal integration of physical quantities linked to the decay of radon or its progeny (number of traces, number of charges, number of atoms).
Given the possible, and possibly significant, variations in radon activity inside homes, only this type of determination can be used to assess health risk.
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Measuring radon emissions
Radon exposure in the home
Bibliography
Standards and norms
- Nuclear energy – Measuring radioactivity in the environment – Air – Radon 222: methods for integrated measurement of the mean volumetric activity of radon, in the atmospheric environment, with passive sampling and off-line analysis [cancelled on October 5, 2012, replaced by NF ISO 11665-4] - NF M60-766 - Septembre 2004
- Measuring radioactivity in the environment – Air: radon 222 – Part 4: Integrated measurement method...
Regulations
Code de la santé publique (new regulatory part) : Chapter 3 Ionizing radiation – Section 1 General measures to protect the population against ionizing radiation – Section 2 Exposure to ionizing radiation of natural origin – Articles R. 1333-1 to R. 1333-16.
Code de la santé publique (new legislative part) : Titre 3 Prévention des risques sanitaires liés à l'environnement et au travail – Chapter 3 Ionizing...
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