Measurements of Annual Exposure and Inhalation Dose Due to Radon and Its Progeny in the Dwellings of Hardoi District (u.p.) by Using Solid State Nuclear Track Detector (ssntd)

In the present study annual exposure and inhalation dose due to radon and its progeny were measured in some selected dwellings of Hardoi District (U.P.) by using solid state nuclear track detector (LR 115 Type-II Plastic track detector). The measurement was repeated on a time integrated four quarterly cycles to cover all the four seasons (summer, rainy, autumn & winter) of the calendar year. The value of annual exposure from radon progeny in the dwellings was found to vary from 0.046 WLM to 0.0.148 WLM with an average value of 0.097 WLM in summer season, 0.054 WLM to 0.130 WLM with an average value of 0.092 WLM in rainy season, 0.018 WLM to 0.156 WLM with an average value of 0.087 WLM in autumn season and 0.113 WLM to 0.292 WLM with an average value of 0.203 WLM in winter season where as the inhalation dose due to radon progeny was found to vary from 0.178 mSv/y to 0.57 mSv/y with an average value of 0.376 mSv/y in summer season, 0.209 mSv/y to 0.504 mSv/y with an average value of 0.356 mSv/y in rainy season, 0.069 mSv/y to 0.605 mSv/y with an average value of 0.337 mSv/y in autumn season and 0.438 mSv/y to 1.132 mSv/y with an average value of 0.787 mSv/y in winter season. The results shows higher value of annual exposure and inhalation dose in winter season as compared to the other season. At all the places the annual exposure and inhalation dose was found below to the action level 3-10 mSv/y as recommended by the International Commission on Radiation Protection (ICRP). Therefore, it is concluded that the study area is quite safe from radiation protection point of view.