Human exposure to radon decay products in the south west.

Recent work by the National Radiological Protection Board indicates that higher than average levels of exposure due to radon occur in the South West. West Devon District Council has undertaken its own survey on radon concentrations to see whether these can be associated with lung cancer incidence. The control of radon gas is likely to have implications for building structure and ventilation. There is a potential conflict between the desirability of increasing ventilation to cut radon levels on the one hand and reducing air infiltration to save energy on the other. This briefing paper reviews the NRPB's published results and other relevant information about radon. The paper gives background information, an account of levels of exposure and biological effects; county averages, high radon areas and risk estimates, and a note on radon control.