Progress in Superconductivity

The Korean Superconductivity Society (한국초전도학회)
권호 표지

Development of ITER TF Cable-in-Conduit Conductors and Their Characteristics

ITER TF 초전도 도체 개발과 특성

  • Published : 2009.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

As a participant taking part in the ITER TF conductor R&D program, we developed two toroidal field conductors with variations of conduit thickness resulting in the different void fraction of the conductors. The estimated void fractions of the conductors are 31% and 33%. In this paper we present the details of the TF conductor development and performance test results of them carried out by the measurement of current sharing temperature under cyclic loading. Regarding the conductor development, the internal-Sn-processed $Nb_3Sn$ strand characteristics, strand cabling, twist pitch and characteristics of the conduit materials are presented. For the understanding of the conductor design and performance, the conductor test results are presented and the effect of the conductor design parameters such as void fraction and twist pitch is discussed based on the results.

Keywords

References

  1. L. Dresner, “Twenty years of cable-in-conduit conductors: 1975-1995”, J. of Fusion Energy, vol. 14, pp. 3-12 (1995). https://doi.org/10.1007/BF02214029
  2. N. Mitchell, “Summary, assessment and implications of the ITER model coil test results”, Fusion Engineering and Design, vol. 66-68, pp. 971-993 (2003). https://doi.org/10.1016/S0920-3796(03)00237-0
  3. P. Bruzzone et al., “Test results of two ITER TF conductor short samples using high current density Nb3Sn strands”, IEEE Trans. Appl. Supercond., vol. 17, pp. 1370-1373 (2007). https://doi.org/10.1109/TASC.2007.898504
  4. N. Mitchell, “Operating strain effects in Nb3Sn cable-in-conduit”, Supercond. Sci. Tech., vol. 18, pp. 396-404 (2005) https://doi.org/10.1088/0953-2048/18/12/029
  5. A. Nijhuis, Y. Ilyin, “Transverse load optimization in Nb3Sn CICC design; influence of cabling, void fraction and strand stiffness”, Supercond. Sci. Tech., vol. 19, pp. 945-962 (2006) https://doi.org/10.1088/0953-2048/19/9/011
  6. P. Bruzzone, B. Stepanov, R. Wesche, E. Salpietro, A. Vostner, K. Okuno, T. Isono, Y. Takahashi, Hyoung Chan Kim, Keeman Kim, A. K. Shikov, V. E. Sytnikov, “Results of a new generation of ITER TF conductor samples in SULTAN”, IEEE Trans. Appl. Supercond., vol. 18, pp. 459-462 (2008). https://doi.org/10.1109/TASC.2008.922266
  7. S. Oh, C. Lee, H. Choi, K. Moon, K. Kim, J. Kim, P.-Y. Park, “A variable temperature Walter spiral probe for the critical current measurement of superconducting strands”, IEEE Trans. Appl. Supercond., vol. 18, pp. 1063-1066 (2008). https://doi.org/10.1109/TASC.2008.921254
  8. ITER Final Design Report, Jan. 2004, ITER IT Design Description Document.
  9. “Specification and performance database for steel jackets for Nb3Sn conductors”, ITER Design Description Document, Jul. (2005)
  10. A. M. Fuchs, B. Blau, P. Bruzzone, G. Vecsey, M. Vogel, “Facility status and results on ITER full-size conductor tests in SULTAN”, IEEE Trans. Appl. Supercond., vol. 11, pp. 2022-2025 (2001). https://doi.org/10.1109/77.920251
  11. P. Bruzzone et al., “Test results of two European ITER TF conductor samples in SULTAN”, IEEE Trans. Appl. Supercond., vol. 18, pp. 1088-1091 (2008). https://doi.org/10.1109/TASC.2008.922268