title: [Assessment of radiation exposure of miners to radon and its daughter products in selected non-ferrous metal mines].
abstract: BACKGROUND
  For over 40 years already, the Nofer Institute of Occupational Medicine (NIOM) in Lodz has been supervising non-ferrous metal mines for miners' radiation risk of radon and its short-lived daughters products found in the air of mines.
  
  
  METHODS
  The supervision involves the use of trace detectors placed in passive dosemeters worn by a representative group of miners.
  
  
  RESULTS
  During the late 1960s, the exposure in some mines was as high as 50 mSv/year. Owing to the steps undertaken in the mines, including primarily the provision of improved ventilation systems, the exposure was reduced to 5 mSv/year, and then to 2 mSv/year during the 1980s and 1990s.
  
  
  CONCLUSIONS
  The results of measurements, performed during the recent 10 years, show that the exposure in non-ferrous metal mines is now within the limits specified for worker category B, i.e., not exceeding 6 mSv/year. The mean annual effective dose for a ten-year (1998-2009) period was 2.1 +/- 0.9 mSv/year.
authors: Instytut Medycyny Pracy im. prof. J. Nofera, Łódź Załdad Ochrony Radiologicznej. jolsz@imp.lodz.pl
authors: Jerzy
authors: J
authors: Olszewski
authors: Janusz
authors: J
authors: Kacprzyk
authors: Zbigniew
authors: Z
authors: Kamiński
mesh_terms: D000395:Air Pollutants, Occupational / Q000032:analysis*; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D006801:Humans; D008670:Metals / Q000009:adverse effects; D008906:Mining; D009381:Neoplasms, Radiation-Induced / Q000517:prevention & control; D016273:Occupational Exposure / Q000032:analysis*; D011044:Poland; D011834:Radiation Monitoring / Q000379:methods*; D011886:Radon / Q000009:adverse effects / Q000032:analysis*; D017687:Radon Daughters / Q000032:analysis
chemical_list: D000395:Air Pollutants, Occupational; D000396:Air Pollutants, Radioactive; D008670:Metals; D017687:Radon Daughters; D011886:Radon