Solid state nuclear track detectors (LR-115, type II) were used to measure the radon (222Rn) emanation coefficient in some building materials and internal hazards associated with exposure of alpha particles in Shahjahanpur District of Uttar Pradesh. For the same measurement, cylindrical can technique was used containing LR-115, type II plastic detector. The 222Rn-emanation coefficient, alpha index, 222Rn-exhalation and activity of 226Ra concentration was found varied from 0.0683 to 0.1802, 0.11 Bqkg─1 to 0.35 Bqkg─1, 15.37 mBqKg─1h─1 to 20.97 mBqKg─1h─1 and 11.37 BqKg─1 to 35.15 BqKg─1 respectively. There is a significant variation between the observed values of the different building material samples. There variations in the radon emanation coefficient might suggest that building material sample has almost similar grain size. The estimated values of 222Rn emanation coefficient (Rn)EC, alpha index (Iα), 222Rn exhalation (Em) and activity of radium concentration (CRa) were found below the standard value as recommended by environmental protection agency (EPA).Thus the use of building materials for construction work in the study area is safe from health hazards as well as radiation protection point of view.
