FEP catalogue for the VSG. Concept and structure. Documentation. Preliminary safety analysis for the Gorleben site

The main targets for final disposal of heat-generating high-level radioactive wastes in deep geological formations are the long-term safety of man and environment with respect to ionizing radiation and other hazardous effects and the avoidance of unacceptable burden and responsibilities for future generations. The report explains the concept and structure of the preliminary safety analysis Gorleben (VSG). Prerequisites for a long-term safety analysis are knowledge and expectations concerning future geologic and climatic development of the site. The scientific description of the initial conditions and the factors influencing the future final repository system are based on a catalogue of features, events and processes (FEP). The structure of FEP issues is described including information and examples.