In relation to the controlled release of material containing very low levels of radioactive material, an international Safety Standard has recently been published by the IAEA which establishes a set of levels of radionuclides, including radionuclides from NORM, for use in the practical application of the concepts of exclusion, exemption and clearance [19].
Des mécanismes de libération pour de telles matières sont appliqués dans de nombreux pays, qui utilisent des méthodes analogues à celles décrites dans les documents internationaux.