The Physical Protection of Nuclear Material and Nuclear Facilities INFCIRC/225/Rev.4 (Corrected) INFCIRC/225/Rev.4 (Corrected) Table of Contents Preface Introduction Definitions Objectives Elements of a State's System of Physical Protection of Nuclear Material and Nuclear Facilities 4.1 General 4.2 Legislation and Regulation 4.3 Confidentiality 4.4 Evaluation of the implementation of physical protection measures Categorization of Nuclear Material 5.1 Basis for concern 5.2 Categorization Requirements for Physical Protection Against Unauthorized Removal of Nuclear Material in Use and Storage 6.1 General 6.2 Requirements for Category I nuclear material 6.3 Requirements for Category II nuclear material 6.4 Requirements for Category III nuclear material Requirements for Physical Protection Against Sabotage of Nuclear Facilities and Nuclear material During Use and Storage 7.1 General 7.2 Requirements for nuclear power reactors 7.3 Requirements for other nuclear facilities and nuclear materials Requirements for Physical Protection of Nuclear Material during Transport 8.1 General 8.2 Requirements for Category I nuclear material 8.3 Requirements for Category I nuclear material related to the mode of transport 8.4 Requirements for Category II nuclear material 8.5 Requirements for Category III nuclear material

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