Radiation doses due to radon and progeny in the Postojna Cave
Janja Vaupotič, Petra Dujmovič , Ivan Kobal - (27/1,1998)
In 1996 in the Postojna Cave etched-track detectors were exposed every month at five locations along the route of the guided tourist tour to measure average radon concentrations, and in every season radon, its progeny and equilibrium factor were continuously monitored for 5-10 days. The evaluation of the data revealed a negligible radiation dose for a visitor and yearly doses of up to 15 mSv for workers in the cave (guides, train drivers, maintenance workers, and kiosk workers). These high doses require the restriction of time spent by a worker in the cave and regular radon monitoring in the cave.