[en] Nuclear Safety and Radiation Protection are technological disciplines whose international character have been recognised since the very beginning. Safety culture and the defense in depth criterium address in the same way this international collaboration. The International Atomic Energy Agency, with headquater in Vienna, is specially sensitive to this aspect and a significant amount of resources has been dedicated to the promotion of a closer international collaboration through the promotion of two complementary programs: the Convention on Nuclear Safety and the Convention on Rad waste Management, and the reconstruction of a great piramide of standards, that staring with Fundamental Principles, is followed with a set of Basic Safety Standards and completed with Safety Requirements and additional technical information, that provide practical ways to implement the Fundamental Principles. This article describe briefly the RASS Program of the IAEA (Radiation Safety Standards) and the work of the Technical Committees established to assess the Director General of the IAEA in this task. (Author)