Understanding Security in Radioprotection Uwe Saathoff Germany’s regulatory landscape for ionizing radiation is comprehensive. It includes the Radiation Protection Act (Strahlenschutzgesetz), the Radiation Protection Ordinance (Strahlenschutzverordnung), DIN standards, and guidance from the Strahlenschutzkommission. These frameworks are designed to protect people and the environment from the harmful effects of radioactive substances. However, most of these regulations focus on safe handling — from procurement and storage to processing and transport. In 2020, a new directive added a layer of security: the SEWD Directive. What Is the SEWD Directive? The SEWD Directive, officially titled “Guideline for Protection Against Interference or Other Third-Party Actions During Handling and Transport of Radioactive Substances”, was issued by the Federal Ministry for the Environment (BMUV). Its purpose is clear: to prevent the criminal release or theft of radioactive materials — either on-site or d