Assessment of lung deposition and breathing rate of underground miners in Tadjikistan.
Deposited gamma ray activity in miners'lungs and airborne concentrations of 222Rn decay products were measured in a metal mine in Tadjikistan.
Measurements for about 100 miners were performed, using filtered air samples to estimate their decay product exposures and a field gamma ray system to determine corresponding chest activities.
These two quantities yielded the deposited lung activity per unit exposure, which is proportional to the product of the average minute volume and the fractional lung deposition, called here the « filtration ability of lungs » (FAL).
The group average FALs were found to be, for drillers, assistant drillers, and inspection personnel, respectively, 0.0079,0.0067, and 0.0052 m3. min-1, with approximately 20% standard error.
Independent measurements were also made, for a group of mine workers engaged in light work, not only of FAL, but also of breathing rate (minute volume), permitting estimation of the lung deposition fraction, found to average 0.34±0.03.
Finally, this value was used together with the group FALs noted to yield upper-bound estimates of the average minute volumes for these job categories, respectively, 0.02. ±0.004,0.020±0.004, and 0.015±0.003m3. min-1.
Mots-clés Pascal : Tadjikistan, Mineur, Exposition professionnelle, Dosimétrie, Poumon, Rythme respiratoire, Rayonnement gamma, Radon, Etude statistique, Maladie professionnelle, Asie, Epidémiologie, Poumon pathologie, Appareil respiratoire pathologie
Mots-clés Pascal anglais : Tajikistan, Minor, Occupational exposure, Dosimetry, Lung, Breathing rate, Gamma radiation, Radon, Statistical study, Occupational disease, Asia, Epidemiology, Lung disease, Respiratory disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0218437
Code Inist : 002B30B01B. Création : 09/06/1995.