Stability estimations and quench simulations for the ITER conductors
- 36 Downloads
- 4 Citations
Abstract
Quench simulations and stability estimations for the International Thermonuclear Experimental Reactor (ITER) are discussed. Especially numerical issues and associated benchmark actions are summarized. Satisfactory agreement between the various codes from the 4 ITER parties is now obtained after numerical convergence problems have been resolved. However, these require confirmation by experiments on relevant conductor geometries. In multistage cables, a non-uniform current distribution within the cable affects the stability of the conductor. A possible mechanism for the non-uniform distribution is flux loops between the strands or cable substages as the current is ramped up or down. A preliminary estimation of stability with non-uniform current distribution is also discussed.
Key Words
ITER stability quench superconductor CICC FCC calculationPreview
Unable to display preview. Download preview PDF.
References
- 1.M. Huguet, “The ITER Project, Status and Prospects,” Proc. of 14th Int. Conf. on Magnet Technology, Tampere, 1995.Google Scholar
- 2.D. S. Beard, W. Klose, S. Shimamoto and G. Vecsey, “The IEA Large Coil Task,” Fusion Eng. and Des. Vol. 7, Nos. 1&2 (1988) pp. 1–232.CrossRefGoogle Scholar
- 3.L. Bottura, “Quench Analysis of Large Superconducting magnets Part 1,” Cryogenics 25 (1985) pp. 185–193.CrossRefGoogle Scholar
- 4.V. Kalinin, private communication on VINCENTA code, June 1994.Google Scholar
- 5.K. Yoshida, “Stability and Protection of Forced Cooling Conductor for Large Superconducting Magnet”, JAERI-M 92-119 (1992).Google Scholar
- 6.N. Koizumi, Y. Takahashi, private communication on POCHI code, Oct. 1994.Google Scholar
- 7.A. Shajii, “Theory and Modeling of Quench in Cable-in-Conduit Superconducting Magnets,” MIT PhD thesis PFC/RR-94-5, Apr. 1994.Google Scholar
- 8.M. Takayasu, et al., “Measurements of Ramp-Rate Limitation of Cable-in-conduit Conductors,” IEEE Trans. on Appl. Superconductivity, Vol. 3 (1993) pp. 456–459.CrossRefGoogle Scholar
- 9.Y. Takahashi, et al., “Experimental Results of Stability and Current Sharing of NbTi Cable-in-conduit Conductors for the Poloidal Field Coils,” IEEE Trans. on Appl. Superconductivity, Vol. 3 (1993) pp. 610–613.CrossRefGoogle Scholar
- 10.V. Arp, “Computer Analysis of Quench Transients in Forced-flow Cooled Superconductors for Large MHD Magnets,” Proc. of Superconducting MHD Magnet Design Conference, MIT (1978).Google Scholar
- 11.K. Okuno, et al, “Experiments of the l-m-bore, 30-kA Superconducting Demo Poroidal Coils,” SOFE13 (1989) pp. 776–779.Google Scholar
- 12.H. Katheder, “A general formula for calculation of the friction factor for cable in conduit conductors,” The NET Team, Internal note N/R/0821/26/A (1993).Google Scholar
- 13.M. One, et al., “Estimation Method of Stability for the Multistrand Superconducting Cables under Partial Current Distribution,” Proc. of 16th Appl. Superconductivity Conf., Boston, 1994.Google Scholar
- 14.L. Bottura, N. Mitchell and J.V. Minervini, “Design Criteria for Stability in Cable-in-conduit Conductors,” Cryogenics 31, pp. 510 (1991).CrossRefGoogle Scholar
- 15.G. Vecsey, et al., Preliminary Conclusions of ITER Coordination Group on the test program of QUELL, contr. to 5th ITER/QUELL Meeting, Feb. 1995.Google Scholar