Assignment of a radiological map of the city of Borujerd in Iran

The specific activity of radionuclides in the soil of the Borujerd region using high purity Germanium detector (HPGe) was measured and the associated radiological hazards were calculated. The mean specific activity of radionuclides of Ra-۲۲۶, Th-۲۳۲, K-۴۰, and Cs-۱۳۷ in soil was obtained at ۱۰.۹۹±۵.۱۱, ۳۵.۳۶±۴.۴۴, ۳۲۴.۲۰±۱۰.۲۴, and ۲.۹۳±۰.۶۰ Bq.kg-۱. These values were below the global average. Also, the value of basic radiological risk parameters, such as Raeq, AEDout, AEDint, Hex, Hin, and Iγ, ranged from ۵۲.۰۲ to ۱۳۹.۵۴ in Bq.kg-۱, from ۲۴.۹۸ to ۶۸.۲۷ and from ۴۲.۹۰ to ۱۱۷.۲۲ in mSv.y-۱, ۱۲۲.۵۷ to ۳۳۴.۹۳, ۰.۱۴ to ۰.۳۷, ۰.۱۶ to ۰.۴۰, and ۰.۲۷ to ۱.۰۴, respectively. The range of excess lifetime cancer risk (ELCR) value for the surrounding soil samples varied from ۰.۱۵×۱۰-۳ to ۰.۴۱×۱۰-۳, in which samples S۴, S۱۴, S۲۴, S۲۷, S۲۸, S۲۹, and S۳۰ exceeded the global average of ۰.۲۹×۱۰-۳. A radiological map of the city of Borujerd was prepared using the GIS program. The study showed that the level of radioactivity in the Borujerd area did not exceed the critical value and is in line with the global results.

Keywords:

radionuclide , Radiological map , Radiological indices , HPGe