title: The overview of the radon and environmental characteristics measurements in the Czech show caves.
abstract: This paper focuses on the measurement and assessment of absorbed doses of radiation in caves of the Czech Republic, some of which exhibit high activity concentration of radon in air. Presented is an analysis and recommendations based on measurement results obtained in the underground caves over the past 12 y. The most important results for cave environments were as follows: integral radon monitoring using RAMARN detectors can provide more consistent results for calculating the effective dose; no major differences were shown in the average radon activity concentration during working time as opposed to non-working time; the unattached fraction of radioactive particles in air ranged from 0.03 to 0.6, with arithmetical average fp = 0.13; the direct dependence between equilibrium factor F and the size of the unattached fraction fp was described using the Log-Power expression ln(1/fp) = a*ln(1/F)(b); the calculated values for coefficients a and b were 1.85 and -1.096, respectively. The individual cave factor for each investigated underground area was calculated.
authors.affiliation: Czech Technical University in Prague, Department of Dosimetry, Břehová 7, 115 19 Praha 1, Czech Republic thinova@fjfi.cvut.cz.
authors.forename: L
authors.initials: L
authors.lastname: Thinová
authors.affiliation: National Radiation Protection Institute, Bartoškova 28, Praha 4 140 00, Czech Republic.
authors.forename: A
authors.initials: A
authors.lastname: Froňka
authors.affiliation: Czech Technical University in Prague, Department of Dosimetry, Břehová 7, 115 19 Praha 1, Czech Republic National Radiation Protection Institute, Bartoškova 28, Praha 4 140 00, Czech Republic.
authors.forename: K
authors.initials: K
authors.lastname: Rovenská
mesh_terms: D000336:Aerosols; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D000512:Alpha Particles; D059552:Caves; D018153:Czech Republic; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D019015:Geologic Sediments; D006801:Humans; D006813:Humidity; D016273:Occupational Exposure; D010316:Particle Size; D044367:Phase Transition; D000069079:Radiation Exposure; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods; D011886:Radon / Q000032:analysis*; D012621:Seasons; D012990:Soil Pollutants, Radioactive / Q000032:analysis; D055161:Speleotherapy; D013696:Temperature; D014875:Water Pollutants, Radioactive / Q000032:analysis
chemical_list: D000336:Aerosols; D000396:Air Pollutants, Radioactive; D012990:Soil Pollutants, Radioactive; D014875:Water Pollutants, Radioactive; D011886:Radon