Transcript ITER Port-Plug Engineering

Design and testing of the
ITER ECRH Upper Launcher
ITER 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
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
2 | RST - Cadarache, 12 July 2010
G. Aiello
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
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
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
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
Electon Cyclotron Heating Upper Launcher (ECH UL)
• Sharing beetween the associations: CEA/Cadarache, HAS
02 May – 30 July 2010: secondment at CEA/IRFM
4 | RST - Cadarache, 12 July 2010
G. Aiello
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
The ECH UL in ITER
Physics mission:
control of the MHD
instabilities in the plasma.
Main frame
BSM
Support flange
Connection flange
• 4 Upper Launchers: length 6 m, weight 16 t
• Outer structure: two separate units
• Cantilevered structure
5 | RST - Cadarache, 12 July 2010
G. Aiello
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
The ECH UL: internal overview
Main frame –
double wall area
Intermediate
plate
Auxiliary
shield
Main frame –
single wall area
Socket
Support flange
BSM with double
wall shell
Closure plate
Waveguides
Quasi optical mirrors
Front shield
Internal shield
Main frame – BSM flange
First wall panel
Focusing mirrors
Steering mirrors
Main components
• Socket
• Closure plate
• Main frame: single/double wall
6 | RST - Cadarache, 12 July 2010
G. Aiello
• BSM with First Wall Panel
• Shield blocks
• Millimeter wave components
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
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
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
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
8 | RST - Cadarache, 12 July 2010
G. Aiello
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
Testing of thermohydraulic behaviour
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
9 | RST - Cadarache, 12 July 2010
G. Aiello
Experimental measurements
are necessary to verify the
compliance with the limits.
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
Outgassing measurements: setup
An experimental setup
has been developed to
investigate the partial
outgassing rates q of
HIPed stainless steel
samples.
q
C  PsR  PbR 
A
Outgassing depends on temperature,
time, surface finish…
10 | RST - Cadarache, 12 July 2010
G. Aiello
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
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
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
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
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
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
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
Neutronic catia model
Flexibility: different configurations
for neutronic analysis
by managing the
skeleton.
14 | RST - Cadarache, 12 July 2010
G. Aiello
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft
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
KIT - Universität des Landes Baden-Württemberg
und nationales Forschungszentrum in der
Helmholtz-Gemeinschaft