Measurement of nationwide indoor Rn concentration in Japan.
Indoor Rn (222Rn) concentrations in Japan were measured to estimate the effective dose to the general public due to Rn and its progeny.
Twenty houses were selected in each prefecture throughout Japan.
As a total, 940 houses were subjected to the measurement using passive Rn monitors.
The Rn monitor was installed in a bedroom or a living room in each house for four successive three-month periods.
The annual mean indoor Rn concentration was estimated from the four measurements in each house.
The mean, median and geometric means of indoor Rn concentration in Japan were obtained to be 15.5,11.7 and 12.7 Bq m-3, respectively.
The Rn concentration shows approximately a log-normal distribution.
Seasonal and structural dependence of Rn concentration was observed.
The effective dose to the general public due to Rn and its progeny was estimated to be 0.45 mSv y-1 in Japan.
Mots-clés Pascal : Japon, Asie, Pollution radioactive, Pollution origine naturelle, Pollution intérieur, Logement habitation, Maison individuelle, Radon, Descendance, Radioactivité, Surveillance, Dosimétrie, Homme, Radiocontamination, Variation saisonnière, Matériau construction
Mots-clés Pascal anglais : Japan, Asia, Radioactive pollution, Natural origin pollution, Indoor pollution, Housing, One family house, Radon, Progeny, Radioactivity, Surveillance, Dosimetry, Human, Radioactive contamination, Seasonal variation, Construction materials
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0262678
Code Inist : 001D16C06. Création : 16/11/1999.