- Commission of the European Communities (6)
- OECD Nuclear Energy Agency (4)
- International Energy Agency (2)
- Organisation for Economic Co-operation and Development (2)
- Association of Danish Electric Utilities (1)
- European Conference of Ministers of Transport (1)
- France. Commissariat à l'énergie atomique (1)
- International Atomic Energy Agency (1)
- International Energy Conference on Demand-Side Management: a Current and Future Resource (1)
- NEA/CEC Workshop on Emergency Planning in Case of Nuclear Accident (1)
- NEA/CEC Workshop on Sealing of Radioactive Waste Repositories (1)
- Symposium on Safety Assessment of Radioactive Waste Repositories (1)
- Workshop on the Migration of Long-lived Radionuclides in the Geosphere (1979 : Brussels, Belgium) (1)