Rad is older unit of measure and equals 0.01 Gy. Exposure Excess lung cancer in workers in uranium , zinc and iron mines. The cancer risk is due to -particles from inhaled radon gas. This concentrates in the bones and emits -particles. However, exposure to radon gas may increase those numbers.
People inhale the gas and it irradiates the lung epithelium by -particles.
This is very important in areas that have a high concentration of uranium in the soil and have poorly ventilited basements. Found a total of 180 excess cancer deaths when compared to nonirradiated controls. Cancer was found mainly in those reciving a whole body dose of 1 Gy. They have been most susceptibile to leukemias and multiple myeloma, but as time goes by some other kinds of cancer are becoming more prevelant. Chernobyl - April 1986.