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Radiation Protection Dosimetry 85:133-136 (1999)
© 1999 Oxford University Press
Three Decades of Track Detectors in Polish Metal-Ore Mines
The assessment of exposure caused by radon (222Rn) and its short-lived daughters (RnDP) in the air of Polish underground mines is reported. The first measurements were carried out in 1966; the active methods (Lucas cells) were used at that time. The results of the measurements pointed to a high probability of exposure at the level of 35 mJ.h.m-3 (10 WLM). In the early 1970s routine investigations were undertaken in Polish underground metal-ore mines. As a measuring device the passive, open-type dosemeter with Kodak LR-115 film was used. The first measurements were performed as environmental assessments but this changed in 1977 when individual dosimetry was introduced. The results here presented indicate that the average annual exposure to RnDP in Polish metal-ore mines has stabilised since the 1980s and equals approximately 1.4 mJ.h.m-3 (0.4 WLM).
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