Estimation of the radiological background and dose assessment in areas with naturally occurring uranium geochemical anomalies-a case study in the Iberian Massif (Central Portugal)

► The importance of small-sized naturally occurring uranium anomalies as a health hazard. ► They must not be treated merely as “outliers” in statistical analyses. ► An integrated approach, from geology field mapping to radiological dose assessment. ► A more accurate assessment of the regional background, the baseline for uranium mine rehabilitation projects.