Determination of radiological map of radionuclides distribution in soils around of Shazand oil power plant
In this study, 34 soil samples were collected from the east of the Shazand power plant to the Arak city, with a length of 25 km. The specific activities of radionuclides of 226Ra, 232Th, 40K, and 137Cs were determined using gamma-ray spectrometry method. Gamma-ray spectra registered to employ high purity germanium (HPGe) detector with 30% relative efficiency. Specific activities of corresponding radionuclides in the soil samples varied from 18.92±3.82 to 43.11±5.38, from 25.31±4.23 to 54.27±7.30, from 230.17±19.93 to 728.25±36.06 and from <1.49 to 35.77±1.76 in Bq/kg, respectively. Alpha and gamma indices were calculated. Gamma index with average value as 0.86 in samples varied from 0.61 to 1.16. Alpha index obtained in a range of 0.09 to 0.22 with average as 0.13. Radiological map of radionuclides distributions using SURFUR15 software was derived.
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