DC performances of ITER NbTi conductors: Models vs. Measurements
Within the R&D program on the International Thermonuclear Reactor (ITER) Poloidal Field (PF) coils, a full size conductor sample was tested in the SULTAN facility (CRPP Villigen, Switzerland). This sample is composed of two straight ITER-like cable-in-conduit conductors, using the same NbTi strand. The two conductors are identical except for one leg makes use of a cable containing steel wraps around the main subcables as in the ITER design, while the other has no wraps inside. The paper presents conductor tests results compared to predictions given by various models developed within ITER associated laboratories. These models aim to predict the DC behaviour of the cable from the experimental performances of the single strand. They have to explain the observed voltage-current (V-I) or voltage-temperature (V-T) characteristics, including thermal runaways. The lower experimental performances compared to all expectations have shown the necessity to reviser the models and to introduce a possible uneven current distribution among the strands of the cables.
Bibliographic Reference: An oral paper given at: 2004 Applied Superconductivity Conference Organised by: 2004 Applied Superconductivity Conference Held at: Adam's Mark Hotel, Jacksonville (US)
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: email@example.com
Record Number: 200417722 / Last updated on: 2004-11-02
Original language: en
Available languages: en