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ITER Port-Plug Engineering

ITER Port-Plug Engineering. Gaetano Aiello. 1 | RST - Cadarache, 12 July 2010 G. Aiello. Outline. EFDA Goal Oriented Training Programme on Port Plug Engineering Description of my working activities at Karlsruhe Institute of Technology (KIT)

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ITER Port-Plug Engineering

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  1. ITER Port-Plug Engineering Gaetano Aiello 1 | RST - Cadarache, 12 July 2010 G. Aiello

  2. Outline • EFDA Goal Oriented Training Programme on Port Plug Engineering • Description of my working activities at Karlsruhe Institute of Technology (KIT) • Description of the working activity during my stage at CEA/Cadarache 2 | RST - Cadarache, 12 July 2010 G. Aiello

  3. Training programme overview - Background • Degree in Safety and Nuclear Technologies Engineering, 3 years (base degree) + 2 years (specialistic degree), University of Palermo. - Fusion training programme: ITER Port-Plug Engineering • Task leader: Louis Doceul • Involved associations: CEA, FZJ, HAS, KIT • Objective: train early-stage engineers in several topics related to the ITER port plug structures during 3 years. 3 | RST - Cadarache, 12 July 2010 G. Aiello

  4. My position in the training programme Work package 3 • Location: KIT, Institute for Materials Research I • Start date: 1st September 2008 • Supervisor: Theo Scherer • Topic: materials, manufacturing and assembly of upper port plug structures in ITER • Sharing beetween the associations: CEA/Cadarache, HAS Electon Cyclotron Heating Upper Launcher (ECH UL) 02 May – 30 July 2010: secondment at CEA/IRFM 4 | RST - Cadarache, 12 July 2010 G. Aiello

  5. The ECH UL in ITER Main frame BSM Support flange Connection flange Physics mission: control of the MHD instabilities in the plasma. • 4 Upper Launchers: length 6 m, weight 16 t • Outer structure: two separate units • Cantilevered structure 5 | RST - Cadarache, 12 July 2010 G. Aiello

  6. Socket Main frame – single wall area Support flange Auxiliary shield Intermediate plate Main frame – double wall area Closure plate BSM with double wall shell Waveguides Quasi optical mirrors Front shield Internal shield First wall panel Focusing mirrors Main frame – BSM flange Steering mirrors The ECH UL: internal overview Main components • BSM with First Wall Panel • Shield blocks • Millimeter wave components • Socket • Closure plate • Main frame: single/double wall 6 | RST - Cadarache, 12 July 2010 G. Aiello

  7. My working activities at KIT • Involvement in the prototype testing of the ECH UL at KIT Launcher Handling Test facility (example: BSM) • Experimental outgassing measurements for the structural material of the ECH UL • Learning of design and simulation tools (example: CFD simulations of the cooling circuit for transmission diamond windows in the gyrotrons) 7 | RST - Cadarache, 12 July 2010 G. Aiello

  8. Prototyping and testing of the BSM Objective: identify the optimum manufacturing strategy for double wall components. 3 concepts: HIP, brazing, machining HIP prototype of BSM corner Testing of thermo-hydraulic behaviour 8 | RST - Cadarache, 12 July 2010 G. Aiello

  9. Outgassing measurements: why? Outgassing is the gas desorbed from a vacuum surface due to the temperature of the surface. Critical issue: contamination of the ITER plasma! Outgassing limits are given in the ITER Vacuum Handbook. HIPing: no outgassing data are available in literature. • In-vessel component: • 316L(N)-IG stainless steel • T=120-150°C (240°C for baking) • Internal vacuum ~ 10-3-10-2 Pa Experimental measurements are necessary to verify the compliance with the limits. 9 | RST - Cadarache, 12 July 2010 G. Aiello

  10. Outgassing measurements: setup An experimental setup has been developed to investigate the partial outgassing rates q of HIPed stainless steel samples. Outgassing depends on temperature, time, surface finish… 10 | RST - Cadarache, 12 July 2010 G. Aiello

  11. CFD simulations for diamond windows in the gyrotrons Transmission diamond windows are necessary to keep the vacuum in the gyrotrons and also act as tritium barriers. The silicon oil DC200(R)5cSt has been investigated as alternative coolant with respect to water for the window assembly. 11 | RST - Cadarache, 12 July 2010 G. Aiello

  12. My working activity at CEA/Cadarache • Study of the Equatorial Port Plug 1 (EPP 1) • Monte Carlo transport code MCNP (already studied at University of Palermo) • EPP 1 catia model for neutronic purposes 12 | RST - Cadarache, 12 July 2010 G. Aiello

  13. The Diagnostic Equatorial Port Plug 1 in ITER Interface programs are able to convert CAD (Catia) geometry data into a suitable model for the Monte Carlo transport code MCNP. Objective: create a simplified EPP 1 Catia model in order to enable neutronic analysis. 13 | RST - Cadarache, 12 July 2010 G. Aiello

  14. Neutronic catia model Flexibility: different configurations for neutronic analysis by managing the skeleton. 14 | RST - Cadarache, 12 July 2010 G. Aiello

  15. Conclusions • Gained experience in vacuum technology and manufacturing methods • Gained skills in design and simulation tools (improvement of my Catia knowledge at CEA/IRFM) Many thanks to CEA/IRFM people for the kind welcome! 15 | RST - Cadarache, 12 July 2010 G. Aiello

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