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DCLL Thermofluid/MHD R&D

DCLL Thermofluid/MHD R&D. Sergey Smolentsev, Neil Morley and the ITER-TBM thermofluid group US ITER-TBM Meeting August 10-12, 2005 INEL. Thermofluid/MHD issues to be resolved over next 10-year R&D. Thermofluid/MHD R&D. MHD/thermal issues of the FCI Thermal behavior of the module

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DCLL Thermofluid/MHD R&D

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  1. DCLL Thermofluid/MHD R&D Sergey Smolentsev, Neil Morley and the ITER-TBM thermofluid group US ITER-TBM Meeting August 10-12, 2005 INEL

  2. Thermofluid/MHD issues to be resolved over next 10-year R&D

  3. Thermofluid/MHD R&D • MHD/thermal issues of the FCI • Thermal behavior of the module • MHD pressure drop and flow balancing

  4. SiCf/SiC FCI vs. sandwich FCI Sandwich FCI is a back up option if SiCf/SiC FCI fails

  5. 3 year POP studies ending in 2008 to access SiCf/SiC FCI feasibility 2008: 1st decision point to choose among 3 options (SiC, Sandwich, both) 2011: 1st TBM construction; 2d decision point to finalize SiCf/SiC or sandwich FCI 2006-2008 are POP studies followed by more detailed studies and mock up testing in 2009-2015 2006-2008 SiC POP R&D 2008 SiC FCI ? 2009-2011 Sandwich R&D I 2009-2011 SiC R&D I 2009-2011 SiCand Sandwich R&D I Decision points: 2008, 2011 2011 SiC orSandwich? 2012-2015 Sandwich R&D II 2012-2015 SiC R&D II First TBM to test in ITER

  6. Experimental facilities and modeling tools Choice of the strong magnetic field facility ?

  7. UCLA MTOR Lab QTOR magnet BOB magnet FLIHY Electrolyte loop MTOR (Magneto-Thermofluid Omnibus Research) • BOB Iron core gap magnet • - Maximum field 2 T • - 3000 A at 150 V • 15 cm width, 10 cm • high, 1 m long • QTOR quarter torus magnet • Toroidal field • Maximum field 1.2 T • Torus major/minor • radius, 0.8m / 0.4 m • - 3800 A at 160 V

  8. The NHMFL Facility atFlorida State University • The NHMFL develops and operates high magnetic field facilities that scientists can use for research in different fields, including engineering. • It is the only facility of its kind in the United States and one of only nine in the world. It is the largest and highest powered magnet laboratory, outfitted with the world's most comprehensive assortment of high-performing magnet systems.

  9. is the largest of its kind in Europe and has a similar function as the High Magnetic Field Laboratory in Tallahassee provides experimental access to high magnetic fields for scientists from all around the world High Magnetic Field Laboratory in Grenoble

  10. 5.6 T superconducting magnet Separated from the coil cryogenic tank for experiments at different orientations of magnetic field lines with regard to the direction of gravity force Homogeneous magnetic field is ensured practically over the whole experimental space High Magnetic Field Facility in Riga, Latvia

  11. Effectiveness of the FCI as electric/thermal insulator Pressure equalization 3-D effects on the temperature, velocity and the pressure: entry/exit, PES or PEH, (T) Forces on the FCI during disruptions MHD/thermal issues of the FCI FCI The merit of the concept depends on the ability of the FCI to reduce the MHD pressure drop and heat losses from Pb-17Li into He.

  12. Thermal behavior: Temperature distribution in Pb-17Li and in the structure over the ITER cycle Temperature distribution in He and FW Heat exchange between Pb-17Li and He Effect of natural convection, MHD turbulence, etc. on the temperature field Engineering goals: Minimization of heat losses from Pb-17Li into He Reduction of the interface temperatures Reduction of the temperature drop across the FCI Thermal behavior of the module g Current heat transfer analysis for the reference DCLL blanket shows that optimization of the blanket performance is a multi-parameter task, which needs multi-scale/multi-physics studies (such as turbulent MHD natural convection shown above). Many modeling and experimental efforts are still needed for TBM.

  13. MHD pressure drop: - Poloidal channels - Manifolds - Coaxial pipe Flow balancing MHD pressure drop and flow balancing Pb-17Li inlet manifold will cause more MHD pressure drop than other elements (25%). Present manifold design does not provide uniform flow distribution. How to design/optimize the manifold without significant increase in MHD pressure drop?

  14. R&D plans: 2006-2015 POP R&D 2006 Phase I 2015 2008 Phase II 2011 • Integrated multi-physics (MHD, heat transfer, stresses, corrosion, etc.) tests will be performed with two mock ups (1/4-1/3 and 1/2-3/4) in a magnetic field from 1 to 4 T • Modeling will concentrate on the completion of the “virtual TBM code”, its testing, and benchmarking using the experimental data. • More detailed R&D • Testing sub-components and a small scale mock up (1/4-1/3) in a magnetic field from 1 to 4 T • Construction of a high temperature Pb-17Li loop. • Modeling efforts will concentrate on simulations of the experimental results and development of a “system code”, preceding the “virtual TBM” code. • In the end of the period, either SiCf/SiC or Sandwich FCI will be chosen as a final design option for the 1st TBM. • Aggressive POP R&D (modeling and experiment) to address the most critical MHD/heat transfer issues, first of all those related to SiCf/SiC FCI • At the end of the period, a decision will be made on the next R&D: • -SiCf/SiCFCI; • Sandwich FCI; • SiCf/SiC and Sandwich FCI.

  15. POP R&D: 2006-2008 SiC FCI (MHD) SiC FCI (disruptions) SiC FCI (heat transfer, low T) Manifold testing and optimization MHD natural convection Code development (HIMAG, UCLA codes) SiCf/SiC FCI as electric/thermal insulator, 2-D, 3-D Sandwich FCI, 2-D MHD natural convection, 2-D, 3-D Manifold (test calculations) Fringing B-field Coaxial pipe, 2-D, 3-D

  16. R&D Phase I: 2009-2011 Sandwich FCI (MHD, Heat transfer, disruptions) ? SiC/Sandwich FCI (heat transfer, high T) Sub-component (manifold, coaxial pipe, multi-channel, fringing B-field) and mock up (1/4-1/3) tests in a magnetic field from 1 to 4 T Code development towards “system code” and “virtual TBM” Sandwich FCI as electric/thermal insulator, 2-D, 3-D ? 3-D calculations for various sub-components to simulate the experimental results

  17. R&D Phase II: 2012-2015 Integrated tests with two mock ups (1/4-1/3 and 1/2-3/4) in a magnetic field from 1 to 4 T Code development towards “virtual TBM” (final phase)

  18. Pre-cost summary • POP R&D, 2006-2008 Costs are associated with man hours, modifications of the existing M-TOR facilities and their operation, purchase of SiCf/SiC inserts, fabrication of about 5 test-articles, experiments, upgrade of the cluster system, and modeling work at UCLA and HyPerComp. • Phase I R&D, 2009-2011 Additional costs are mostly due to construction of a high temperature Pb-17Li loop, modification and operation of a strong magnetic field facility and broader experimental and modeling program. Cost uncertainties are related to the choice of the strong magnetic field MHD facility and decision about the FCI. • Phase II R&D, 2012-2015 The costs per year are expected to be the same (or slightly higher) as in Phase I. Some costs will be shared with other technical groups.

  19. Conclusions • R&D thermofluid/MHD issues have been formulated and prioritized for the next 10-year period • 3 phase R&D plan has been developed • Pre-cost information has been summarized • Coordination with other R&D groups and International collaboration are needed to finalize the R&D plans • Cost estimates can be generated after finalizing the R&D plans

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