Effective dose assessment for workers in caves in the Czech Republic: experiments with passive radon detectors.
The new RAMARN system for radon volume activity measurement was developed in 2003 and has been in use since then. RAMARN system consists of a plastic chamber that is conically cylindrical in shape and about 0.5 l in volume; a bare Kodak LR 115 is located on the bottom of this diffusion chamber. The size was chosen to avoid the influence of deposited decay products of radon. Kodak has a spectrometric character--the tracks are visualized only for alphas with energies between 1 and 3 MeV that touch the foil; thus the effective volume has a lens shape. The response therefore corresponds to diffused radon and half of (218)Po born by radon gas decay. The experiments described below were conducted as one part of a routine methodology control, focused on classifying worker irradiation from natural ionizing radiation sources in show caves and in caves used for speleotherapy.
Thinová
L
L
Department of Dosimetry, Czech Technical University in Prague, 110 00 Prague 1, Czech Republic. thinova@fifi.cvut.cz
Burian
I
I
D018153:Czech Republic; D017753:Ecosystem; D019544:Equipment Failure Analysis; D016273:Occupational Exposure / Q000032:analysis*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000592:standards; D011835:Radiation Protection / Q000295:instrumentation* / Q000592:standards; D011886:Radon / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D011886:Radon