Thermoluminescent dosimetry of people residing in the vicinity of the Rooppur NPP construction site (People's Republic of Bangladesh)

First-time thermoluminiscent dosimetry was used for measurement of external radiation doses to people residing in the vicinity of the Rooppur NPP construction site, Bangladesh. At present in this area the residents receive external dose from natural radiation, their average radiation dose is 1.68 mSv/a. External radiation doses in the area surrounded the construction site, as well as the background radiation, are uniformly distributed, dose diversity range lies within 0.82 to 2.6 mSv/a. Contribution of “transport” dose to dose accumulated by TL dosimeters for 6 months was 8.5% on the average. External radiation doses to those residing in stone houses in the area under study was slightly lower than doses received during outdoor activities. No reliable differences in the radiation dose value to residents and professionals was found. Doses measured by TL dosimeter and background radiation were slightly higher than average doses in the region. This increase is due to excavation of large amount of subsoil during construction and engineering work. Mean annual radiation dose to people residing in the vicinity of the Rooppur NPP construction site is integral dose, it cosnsists global dose from natural radionuclides and cosmic radiation and the dose measured by TL dosimeter. Total mean annual radiation dose from natural sources to peoplw residing in the vicinity of the NPP construction site was 4.5-5.5 mSv/a. TL dosimetry data can be used in the future for evaluating effect of the Rooppur NPP operation on radiological situation in the region.