Comparison between the predictions of the thermo-hydraulic code Gandalf and the results of a long length instrumented CICC module experiment

Thermo-hydraulic modeling of cable in conduit conductors (CICC) contains on e main uncertainty in the heat exchange coefficient used in the different p ossible fluid regimes. Nowadays validation of codes, by comparison with dat a from experiments involving long length instrumented conductors, is one of the main technique for assessing the design tools for the large magnets fo reseen in the next generation fusion machines. To this purpose, a broad dis turbance scenario has to be investigated to confirm the magnet's stability versus normal and off-normal working conditions. In this paper a comparison between the predictions of the code Gandalf and the data obtained from an instrumented NbTi conductor module is carried out. (C) 2001 Elsevier Scienc e Ltd. All rights reserved.