RADIATION-DOSES IN PAKISTANI HOUSES

Natural radioactivity in building materials has been measured to deter mine the external dose equivalent rate due to walls, floor and ceiling . Indoor radon has been measured to estimate the internal dose rate. O ccupancy factor was estimated to be 0.3. It is found that the external dose equivalent rate to lungs is less than or equal to the internal d ose equivalent rate. Both the external and internal dose equivalent ra tes in the houses under consideration are less than the background dos e equivalent rate value given by UNSCEAR.