Evaluation of radiological impacts of tenorm in the Tunisian petroleum industry

► We followed 232Th, 226Ra and 40K concentrations in Tunisian petroleum products and wastes. ► Radium isotopic data were used to estimate the age of scales deposited in the petroleum production equipments. ► Samples collected from refinery installation did not represent radiological risk. ► Scale samples collected from oil fields installation exceeded UNSCEAR rules.