Design and testing of theITER ECRH Upper Launcher

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

ITER Port-Plug EngineeringITER Port-Plug Engineering

Gaetano Aiello

1 | RST - Cadarache, 12 July 2010

G. Aiello

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

Outline Outline

2 | RST - Cadarache, 12 July 2010

G. Aiello

1. EFDA Goal Oriented Training Programme on Port Plug Engineering

2. Description of my working activities at Karlsruhe Institute of Technology (KIT)

3. Description of the working activity during my stage at CEA/Cadarache

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

Training programme overview Training programme overview

- 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.

- Background

3 | RST - Cadarache, 12 July 2010

G. Aiello

• Degree in Safety and Nuclear Technologies Engineering, 3 years (base degree) + 2 years (specialistic degree), University of Palermo.

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

My position in the training programme 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

02 May – 30 July 2010: secondment at CEA/IRFM

4 | RST - Cadarache, 12 July 2010

G. Aiello

Electon Cyclotron Heating Upper Launcher (ECH UL)

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

The ECH UL in ITERThe ECH UL in ITER

• 4 Upper Launchers: length 6 m, weight 16 t• Outer structure: two separate units• Cantilevered structure

5 | RST - Cadarache, 12 July 2010

G. Aiello

Physics mission:control of the MHD instabilities in the plasma.

BSM

Main frame

Support flange

Connection flange

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

The ECH UL: internal overviewThe ECH UL: internal overview

6 | RST - Cadarache, 12 July 2010

G. Aiello

Closure plate Waveguides

Internal shield Front shield

Steering mirrors Focusing

mirrors

Quasi optical mirrors

Support flange Intermediate

plate

Auxiliary shield

Main frame – double wall area

Main frame – single wall area

Socket

First wall panel

BSM with double wall shell

Main frame – BSM flange

Main components

• Socket• Closure plate• Main frame: single/double wall

• BSM with First Wall Panel• Shield blocks• Millimeter wave components

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

• 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

My working activities at KIT My working activities at KIT

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

Prototyping and testing of the BSMPrototyping and testing of the BSM

Testing of thermo-hydraulic behaviour

HIP prototype of BSM corner

8 | RST - Cadarache, 12 July 2010

G. Aiello

Objective: identify the optimum manufacturing strategy for double wall components.

3 concepts: HIP, brazing, machining

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

Outgassing measurements: why?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!

9 | RST - Cadarache, 12 July 2010

G. Aiello

In-vessel component:

• 316L(N)-IG stainless steel• T=120-150°C (240°C for baking)• Internal vacuum ~ 10-3-10-2 Pa

Outgassing limits are given in the ITER Vacuum Handbook.

Experimental measurements are necessary to verify the compliance with the limits.

HIPing: no outgassing data are available in literature.

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

Outgassing measurements: setup Outgassing measurements: setup

10 | RST - Cadarache, 12 July 2010

G. Aiello

An experimental setup has been developed to investigate the partial outgassing rates q of HIPed stainless steel samples.

sR bRC P Pq

A

Outgassing depends on temperature, time, surface finish…

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

11 | RST - Cadarache, 12 July 2010

G. Aiello

CFD simulations for diamond windows in the gyrotronsCFD 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.

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

12 | RST - Cadarache, 12 July 2010

G. Aiello

My working activity at CEA/Cadarache 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

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

The Diagnostic Equatorial Port Plug 1 in ITERThe Diagnostic Equatorial Port Plug 1 in ITER

13 | RST - Cadarache, 12 July 2010

G. Aiello

Objective: create a simplified EPP 1 Catia model in order to enable neutronic analysis.

Interface programs are able to convert CAD (Catia) geometry data into a suitable model for the Monte Carlo transport code MCNP.

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

Neutronic catia modelNeutronic catia model

14 | RST - Cadarache, 12 July 2010

G. Aiello

Flexibility: different configurations for neutronic analysis by managing the skeleton.

KIT - Universität des Landes Baden-Württemberg

und nationales Forschungszentrum in der

Helmholtz-Gemeinschaft

Conclusions Conclusions

15 | RST - Cadarache, 12 July 2010

G. Aiello

• 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!