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The response of the primary containment of a LMFBR to a postulated CDA is often analysed using specialised computer codes. A few years ago, the performance of such codes was compared on a reference benchmark case proposed by the Containment Loading and Response Group (CONT) of the Safety Working Group - Fast Reactor Coordination Committee of the Commission of the European Communities. The same test problem has been tackled with the computer code PLEXUS, part of the CASTEM system, which is a general-purpose, nonlinear finite-element code which treats fast dynamic problems in structures also in the presence of fluids. The objective is to check its possible utilisation as an easy-to-use and flexible tool for the analysis of this class of problems. Different approaches to the CONT problem are presented. The calculations were performed over a relatively long period, whenever new models became available in PLEXUS. An approach based on the Lagrangian formulation is discussed, then the improvements realised by an Arbitrary Lagrangian-Eulerian (ALE) model are shown. Finally, the more sophisticated models included due to the PLEXIS-3C collaboration, still based on ALE techniques, are considered.

Additional information

Authors: CASADEI F, JRC Ispra Estab. (IT);DANERI A, ENEA-CRE, "Ezio Clemental", Bologna (IT);TOSELLI G, ENEA-CRE, "Ezio Clemental", Bologna (IT)
Bibliographic Reference: Paper presented: 10th International Conference on Structural Mechanics in Reactor Technology, Anaheim, Ca. (US), Aug. 14-18, 1989
Availability: Available from (1) as Paper EN 34808 ORA
Record Number: 198910620 / Last updated on: 1994-12-01
Original language: en
Available languages: en