Occupational radiological safety in uranium mines and mills
Uranium mining and milling industries are growing rapidly in many countries and this trend is likely to continue with the increasing demand for nuclear fuel. The problems of radiological hazards in this part of the nuclear fuel cycle have received considerable attention in recent years because of the epidenuological evidence of lung cancer among uranium miners, mainly smokers. The hazard is not limited to uranium mines only: investigations having shown that the same radiological constituents that have caused lung cancer among uranium miners, i.e. radon and its decay products, occur in other types of mines; and, in some instances, they occur in sufficient concentration to cause occupational illness. In uranium mines the radiological hazards are primarily due to the airborne radionuclides which consist of radon and its short-lived daughter products, Po-218, Pb-214, Bi-214 and Po-214. Radon (Rn-222) is an inert gas, therefore it passes freely into and out of the lung with minimal uptake by the respiratory system. On the other hand, radon daughters are solids and can get attached to dust particles in the air. Inhaled radon daughters deposit preferentially in the respiratory tract, the exact location depending on their particle sizes. The magnitude of the radiation dose to the respiratory system depends on the concentration of the radon daughters in the inhaled air, the size of particles in the dust to which the daughters are attached, and physiological parameters.
جهاز للمسح الإشعاعي
R700 Radiation Detector with Multi-probes
Type：Nuclear radiation scanner