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In the last few years several European countries undertook closure and environmental remediation of old uranium mining sites. This is the case for Portugal. Due to concerns about public health, environmental radioactivity was recently investigated in a number of counties in the Centre-North of Portugal where the extraction and chemical treatment of uranium ore was carried out, as well as in reference areas. The results of this environmental research and of an assessment of the health condition of local populations allowed the conclusion that some exposure to radioactivity from uranium mining waste occurs in these areas. The reduction of such exposure should be achieved through environmental remediation measures. However, as radio nuclides in uranium mining and milling waste are very long lived and their potential to cause health hazards will last for centuries, remediation measures should be effective for generations. To achieve this goal adequate radioactivity monitoring around sites is needed and institutional custody of waste repository sites should be ensured.

Environmental health risk from past uranium mining and milling activities