Radon dynamics and reduction in an underground mine in Brazil. Implications for workers' exposure.
Radiat Prot Dosimetry
; 98(2): 235-8, 2002.
Article
en En
| MEDLINE
| ID: mdl-11926375
ABSTRACT
This work was aimed at studying the behaviour of 222Rn in an experimental underground copper mine in Brazil with a single entrance. The 222Rn concentrations, meaured by using a dynamic radon measuring technique. varied between 30.5 Bq.m(-3), during ventilated conditions applied to the mine galleries, and 19.4 x 10(3) Bq.(-3) for non-ventilated conditions and when operational mining activities were conducted inside. High radon concentration surges were observed after blasting and drilling activities. In the cases of inadequate ventilation, it was estimated that workers could be subjected to exposures as high as 10 microSv.h(-1), only due to 222Rn and its short-lived progeny. The results show the importance of real-time measurements to evaluate radon dynamics during mining operations.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Exposición Profesional
/
Radón
/
Contaminantes Radiactivos del Aire
/
Minería
Tipo de estudio:
Etiology_studies
/
Risk_factors_studies
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Radiat Prot Dosimetry
Año:
2002
Tipo del documento:
Article
País de afiliación:
Brasil