The ITER toroidal field model coil project

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236 A. Ulbricht et al. / Fusion Engineering and Design 73 (2005) 189–327 Fig. 4.38. The quench detection system of the TFMC winding and the logical links of the quench detectors. The logical output of two quench detectors of a pancake are linked by an “and” gate. All outputs of the “and” gates are linked by an “or” gate.
the quench detection system. The logic links of the quench detectors and the function monitoring allow the exchange of a faulty quench detector during current operation with no risk for the coil. 4.7. Behaviour of the LCT coil The LCT coil was systematically prepared by investigations and experimental tests to extend the current operation from 16 kA up to 20 kA [66]. The goal was achieved by forced-flow-cooling with supercritical He II and by a mechanical reinforcement [45,53,67]. Careful FEM analysis was performed by means of a global model of the TFMC test configuration and detailed model of the LCT coil (Section 8) [68]. The highest in-plane (circumferential) forces on the LCT coil were achieved in the single coil test. This is demonstrated in Fig. 4.39, where the overall horizontal deformation for both load cases, LCT single coil and (LCT coil + TFMC), are presented. During the testing with the TFMC the LCT coil experienced the highest out-of-plane load, which was an overall attractive force of 82 MN between the coils. The measured von A. Ulbricht et al. / Fusion Engineering and Design 73 (2005) 189–327 237 Mises stresses of the coil case were within 20% in fair agreement with the calculations. No instabilities of the LCT coil conductor were observed during the operation of the most loaded case (TFMC: 80 kA, LCT: 16 kA). 4.8. Summary • The TOSKA facility was operated very reliably with an availability of 98% thanks to the experience gained and improvements performed in the preceding tests (1996/1997: LCT coil at 1.8 K; 1999: W 7-X DEMO coil including the facility). • For short times the cryogenic system can work far outside its rated capability by the optimised use of stored LHe. • The two newly developed forced-flow-cooled 80 kA current leads and their high current density watercooled flexible bus bars worked very well at the first attempt. • The electrical supply system up to 80 kA including: power supply, safety discharge circuit, normal and superconducting bus bars, current leads, is unique Fig. 4.39. Comparison of the horizontal deformation measured across the aperture of the LCT coil for the single coil test and the test with adjacent to the TFMC vs. percent of load.
Page 1 and 2: Fusion Engineering and Design 73 (2
Page 3 and 4: The application and continuation of
Page 5 and 6: 3.2. Conductor manufacture 3.2.1. S
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Page 9 and 10: Table 3.5 TFMC double pancake data
Page 11 and 12: 3.3.7. Module ground insulation and
Page 13 and 14: impregnation of the coil in the cas
Page 17 and 18: trial consortium AGAN and the Europ
Page 23 and 24: ˙Q ICS [W] ˙Q case [W] ˙Q bus ba
Page 29 and 30: 4.3.2.4. Standby operation over nig
Page 35 and 36: 2 weeks (JAERI method); for joint 1
Page 37 and 38: Table 4.5 Main operation parameters
Page 45 and 46: Fig. 4.35. Computed TFMC windings c
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Page 55 and 56: ply current regulation. This situat
Page 57 and 58: Fig. 5.6. (a) V-Tin characteristics
Page 61 and 62: known, which is partly true (see Se
Page 63 and 64: Fig. 5.18. Summary of performance a
Page 65 and 66: filaments in the TFMC (and similar)
Page 67 and 68: Symbols Explanation C00 Coefficient
Page 71 and 72: the outer joint outlet. This heat e
Page 73 and 74: Fig. 6.9. Loss energy of the TFMC w
Page 75 and 76: Fig. 6.13. Evolution of the couplin
Page 77 and 78: and during Phase 2 (within 6%). The
Page 79 and 80: other hand, if using the central ch
Page 81 and 82: Fig. 6.20. Top: quench propagation
Page 83 and 84: Fig. 6.23. Measured (multi star) an
Page 85 and 86: fB Friction factor of the bundle re
Page 87 and 88: surement with voltage taps located
Page 89 and 90: Table 7.3 TFMC pancake (joint) resi
Page 91 and 92: Table 7.8 Values of TFMC and FSJS j
Page 93 and 94: Fig. 7.7. The insulated bus bar typ
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Fig. 7.16. Current in the petals re
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ence may exceed the inaccuracy of t
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A. Ulbricht et al. / Fusion Enginee
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provided support to the coil and th
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(c) The best fit in relation to the
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8.5. Comparison to ITER TF coil str
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Fig. 9.7. Partial discharge activit
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circular cross-section and central
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two different sets of Hall probe ar
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equation: dx = Ax + Bu dt y = Cx +
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[34] E. Salpietro, R. Maix, G. Bevi
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[86] R. Heller, D. Ciazynski, J.L.
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ple for ITER, IEEE Trans. Appl. Sup
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PSB: Power System Blockset is a MAT
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The ITER toroidal field model coil project

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