Design Proposal for the ITER Feeder Busbars

Author

Calvi, Marco ; Bauer, Pierre ; Bessette, Denis ; Cau, Francesca ; Marinucci, Claudio ; Bruzzone, Pierluigi

Author_Institution

CRPP, Villigen, Switzerland

Volume

20

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

407

Lastpage

410

Abstract

Based on the functional specification by the ITER organization, CRPP developed a design proposal for the ITER magnet feeder busbar system. The magnetic field level estimated for the operation of the busbars allows the use of NbTi superconductor. The minimum superconducting cross sections and copper stabilizers are calculated based on a temperature margin of 2.5 K and a safe hot spot temperature. Based on these cross sections a busbar cable layout has been identified for each magnet feeder type and the optimization of the parameters performed with thermo-hydraulic codes. The temperature margins have been established considering both AC loss and heat exchange between the magnet coil and the busbars through the twin box joint. The rate of growth of the resistive voltage during a busbar quench was calculated to provide the input required for the design of a reliable quench protection system.

Keywords

Tokamak devices; busbars; fusion reactor design; fusion reactor materials; heat transfer; quenching (thermal); superconducting cables; superconducting magnets; AC loss; ITER magnet feeder busbar system; NbTi superconductor; busbar cable layout; busbar quench; copper stabilizers; heat exchange; hot spot temperature; magnet coil; magnet feeder type; magnetic field level; minimum superconducting cross sections; quench protection system; resistive voltage; temperature margin; thermo-hydraulic codes; twin box joint; CICC; ITER; NbTi busbar; fusion magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2041535

Filename

5433235