// Repository Design, Long-term Safety Studies, Site Investigation and Assessment

VSG

Preliminary safety analysis for the Gorleben site

Within this project, a comprehensive preliminary safety analysis was conducted for a repository for heat-generating waste based on knowledge at a specific site, with the conceptual individual investigations having a prototypical character for future safety analyses (including within a site selection process). The synthesis report summarizes the results achieved in the VSG project. This includes the applied approach to conducting a safety analysis, the developed safety and verification concept, and its specific implementation within the project, the representation of the containment capacity of the designed repository systems against radionuclides originating from radioactive waste, taking into account existing uncertainties, recommendations for future safety analyses derived from experiences during the project, especially regarding research and development needs, and considerations regarding which methodological and technical-conceptual elements developed within the project can be used in safety investigations within a future site selection process.
The VSG project is structured into 14 work packages (APs) assigned to these levels:

Level 1: Basics
AP 2: Geological site description and long-term prognosis
AP 3: Waste specification and quantity structure
AP 4: Safety and verification concept

Level 2: Repository planning and design
AP 5: Development of initial repository concepts
AP 6: Repository design and optimization
AP 12: Assessments of operational safety

Level 3: System analysis
AP 7: FEP catalog
AP 8: Scenario development
AP 9: Integrity analyses
AP 10: Radiological consequence analysis
AP 11: Human intrusion assessment

Level 4: Synthesis and recommendations
AP 13: Summary and evaluation of results (synthesis proper)
AP 14: Recommendations