Community Research and Development Information Service - CORDIS


The Compas project is concerned with the structural performance of metal overpacks which may be used to encapsulate vitrified high-level waste forms before disposal in deep geological repositories. This document describes the series of experiments and associated calculations performed in the intermediate testwork phase of this project. Seven mild steel, one-third scale, simplified models of HLW containers were manufactured in a variety of configurations of geometry and weld type. The effects of reducing the wall thickness, corroding the external surface of the container, and using different welding methods were all investigated. The containers were tested under the action of a uniform external pressure up to their respective failure points. All containers failed by buckling, at pressures of between 42 and 87 MPa dependent upon the particular geometric and weld configuration. The outer surface of each container was comprehensively strain-gauged in order to provide strain histories at positions of interest. Test results and computer predictions were compared and an assessment of the overall performance of the codes demonstrated good agreement in the initial loading of each container. However once stresses exceeded the material yield point there was a considerable spread in the predicted container behaviour.

Additional information

Authors: OVE ARUP & PARTNERS, Ove Arup and Partners, London (GB)
Bibliographic Reference: EUR 12593 EN (1990) 55 pp., FS, ECU 5
Availability: (2)
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top