Radon meaSUrements in fly ash buildings near major thermal power stations in India using SSNTD

摘要

In India, about 70% of the electrical power SU generated by coal based thermal power stations. As a reSUlt, huge amount of coal fly ash SU produced. a part of which SU used for making bricks for construction purposes. Since fly ash contains meaSUrable quantity of radioactive species viz., Uranium, Thorium and Potassium though may be negligible it SU of interest to study their radiological impact to the society. As part of an extensive study to meet thSU objective, radon meaSUrements were carried out in the buildings/houses constructed with fly ash bricks and non-fly ash bricks in the residential areas of 10 major thermal power stations situated in India spanning about 1000 km from each other. The reSUlts of the study indicate that radon concentrations in both the types of buildings are well within the stipulated values and the radon levels do not differ much in view of good ventilation provided in most of the houses.