The First International Conference on Structural Mechanics in Reactor Technology was held in Berlin, Germany, 20-24 September 1971. The purpose of the Conference was to bring together engineers and scientists actively engaged in structural mechanics problems in the field of reactor technology to meet with fundamentalists in the general field of engieering mechanics and to present and discuss applied and fundamental papers on structural mechanics problems in reactor technalogy.The Conference was organized by the Bundesanstalt fOr MaterialprOfung (BAM), Berlin and Commission of the European Communities, Brussel, in collaboration with cooperating establishments and sponsoring societies. About 800 participants attended and some 340 papers were presented. These were classified into twelve divisions.A: Opening Session, B: Power Reactor Development and Structural Mechanics, C: Fuel and Cladding, D: Fuel Elements, E: Shock and Vibration Analysis of Reactor Components, F: Structural Analysis of Core Support and Coolant Circuit Structures, G: Steel Pressure Vessels, H: Prestressed Concrete Pressure Vessels, J: Analysis of Shell Structures, Containment, K: Seismic Response Analysis of Nuclear Power Plant Systems, L: Thermal and Mechanical Analysis, M: Design, Reliability Methods.