Radiological risk from activity concentrations of natural radionuclides: Cumulative Hazard Index

Abstract

The Cumulative Hazard Index method has been proposed for the first time to determine the low and high-risk levels of radionuclides. The significant radiological parameters and risk analyses for 226Ra, 232Th and 40K pollution levels control in the soil are determined through the probability distribution functions. The activity concentration of 226Ra, 232Th and 40K in samples were found to vary from of 16 ± 0.6 to 62 ± 3.2 Bq kg−1 with an average 30 ± 1.1 Bq kg−1, 24 ± 0.9 to 63 ± 1.3 Bq kg−1 with an average 37 ± 1.0 Bq kg−1 and 316 ± 5.8 to 878 ± 6.9 Bq kg−1 with an average 525 ± 6.2 Bq kg−1, respectively.