Indoor and Outdoor Radon Levels and Dose Estimation in Some Areas of China
Li Suyun(China Institute for Radiation Protection,Taiyuan,030006)
The survey results of indoor and outdoor radon concentrations in some areas of China are summarised in this paper,particularly in dwellings near uranium mines,buildings made of cinder bricks and stone like coal cinder bricks,cave dwellings,underground buildings and dwellings in high background radiation areas. In dose assessment the values of exposure effective dose conversion factor,equilibrium factor and occupancy factor indoors are defined,and annual effective dose estimations are given. The problem of protection against radon in buildings is discussed briefly.