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2. Radon isotopes
When the Earth was formed some 5 billion years ago, matter comprised both stable and unstable atoms. Since then, however, the majority of unstable atoms have decayed into stable nuclides through radioactivity. However, there are still a few families of naturally occurring radionuclides.
2.1 Notions of natural radioactivity
Natural radioactivity is made up of three main categories of radioactive elements:
radionuclides produced by nuclear reaction in the upper atmosphere under the action of cosmic rays: carbon-14 ( 14 C), tritium ( 3 H), beryllium-10 ( 10 Be), etc. These elements diffuse into...
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Radon isotopes
Physical phenomena of radon in soils
Bibliography
Bibliography
Regulations
Arrêté du 20 février 2019 relatif aux informations et aux recommandations sanitaires à diffuser à la population en vue de prévenir les effets d'une exposition au radon dans les immeubles bâtis, NOR:SSAP1900884A, ELI : https://www.legifrance.gouv.fr/eli/arrete/2019/2/20/SSAP1900884A/jo/texte...
Standards and norms
- Measuring radioactivity in the environment – Air: radon 222 - NF ISO 11665 - 2012
Websites
IRSN https://www.irsn.fr/
French Nuclear Safety Authority (ASN) https://www.asn.fr/
Occupational health and safety – INRS https://www.inrs.fr/
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