Tore Supra limiter sector dismantling project roger'reichlecea'fr81206

1
IR progam
R. Reichle (RR) J.L. Gardarein (JLG), S.
Carpentier (SC), M. Chantant (MC), C. Pocheau
(CP), H. Roche (HR), R. Daviot (RD), J.C. Vallet
(JCV), A. Durocher (AD), C. Brosset (CB), J.M.
Travere (JMT), E. Gauthier (EG), F. Rigollet
(FR, CNRS-IUSTI), D. Hernandez (DH, CNRS-PROMES),
J.J. Serra (JJS, DGA-Odeillo), J.P. Lasserre
(JLP, CEA/CESTA)

• Outline
• Introduction
• Measurement of thermal and optical properties of
  deposited layers and erosion zones
• Conditions of analysis
• Determination of thermal properties
• Measurement of BRDF (Bidirectional Reflectivity
  Distribution Function)
• In situ diagnostics on sector 6A
• Fibres
• Thermocouples
• Conclusion

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Introduction Motivations
Determination of thermal and optical properties
of deposition and erosion areas Theses JLG
SC RD concerned Realistic simulation of IR
images (JMT). with power flux calculation from
IR data. Modification of in situ
diagnostics Optical fibres replacement of
a defect fibre and preparation for in situ
active thermography. Thermocouples
improvement of inverse calculation of power
flux and development for ITER.

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Conditions of analysis
Measurements not in the assembly hall but in
dedicated laboratories. Samples and laboratories
must comply to safety reglementations. Selectio
n of samples All 150 tiles on tile carriers
which have not been removed for deuterium
analysis. 6 tiles for off site
analysis 2 for each zone thick, thin deposits,
erosion zone. Timing On site
measurements immediately after removal of tiles
for D-investigation, Delay for off site
measurements on tiles gt 6 months.
(CB)
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Status quo of experimental determination of
thermal properties of deposited layers
With SATIR (RR, JCV 2003) in JET NBI test bed
(RD, EG 2006) 1 parameter. With
CNRS-IUSTI (JLG, FR 2006) using pulsed
photothermal method (gt) 2 parameters out of 4
thermal resistance comb. out of thickness,
cond., diff.
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Measurement of thermal properties of deposits
pulsed photothermal method

• Possibilities
• a) Continuation with collaboration CNRS-IUSTI
• b) Cleanroom laser originally set up for
  speckles interferometry
• c) Detritiation laser
• Comparison
• Scope Realisation Ressources Planning
• a) 6 samples proven ! SC collab. gt 2008
• CNRS-IUSTI
• 150 samples laser works JLG, RD,
  CP,EG 05/2007 must be tested 1TPY, 1PPY
  prep. for this purpose 1 k material 3 days
  measurement
• c) 150 samples in development JLG, HR gt mi
  2007 ?
• for other use 1 k material
• Proposal go for b) first, if not possible,
  check c) if not use a).

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Measurement of thermal properties of deposits
other methods
Phase lag for deposit of 100µm, 300µm, 1000µm

• Possibilities
• a) With DGA Odeillo (JJS) mod. photothermal
  method
• Cooldown delay of 6 months, few samples only,
  
• new contract (5k).
• b) Procurement of modulated laser gt 10 kHz 30
  k
• Manpower 0.5 year (CP) to set-up.
• Measurements (150 samples) 3 days.
• ITER IR diagnostic relevant.
• c) Lock-in 2D with halogen lamps gt following
  presentation (AD)
• Frequency (0.5 Hz) too low gt only one
  global parameter.
• d) SATIR method gt following presentation (AD).
  As c)

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Measurement of BRDF (Bidirectional reflectivity
distribution function)

• Important input for simulation of IR images
  long term project (JMT) finally for ITER.
• 3 years of collaboration with CNRS-PROMES (DH).
• Vis-NIR range only.
• Proposal for UV-IR range
• Collaboration with CEA/CESTA (JPL)
• Scope 6 tiles
• Realisation on the site of collaborators,
• Delay gt 6 months cool down time of tiles.
• Costs TBD.

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Status of in situ diagnostics on cassette 6A

• Fibre diagnostic two working SiO2 fibres, one
  destroyed ZrF4 fibre (waterleak oct. 2002).
• No thermocouples.

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Improvement of in situ fibre diagnostics

• Replacement of defect ZrF4 fibre
• a) SiO2 multimode fibre (already here 0),
• b) ZrF4 fibre (7 k, 3 months procurement time).
  Could be used with modulated laser for in situ
  active thermography (ITER-relevant).
• 2) Upgrade of optics for even better active
  thermography by reduction of spot-sizes
• a) Reduction of spotsize of illumination
• (10 k, gt 6 months preparation)
• Reduction of readout spotsize,
• (18 k, 12 months preparation).
• Proposal
• if budget and planning for 05/2007
  1botherwise 1a
• if more time and more money 1b 2a 2b

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Temperature measurements for thermal inverse
methods validation
T outlet 2 fingers
TC imbedded in the finger
collecteur
(MC,SC)
Presently no temperature sensors in the vacuum
vessel. Promising preliminary results obtained
with the calorimetry. Set-up 1 TC imbedded in
the finger and 1 TC on a outlet tube, - to test
a thermal inverse method - to develop validate
the TC technology and implementation technique
Both aspects are of interest for ITER. (15 k,
6 months for the preparation and implementation)
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Conclusions

• Determination of thermal properties of deposits
• Concerns 3 theses (JLG, SC, RD) on IR themes.
• Proposal pulsed photothermal method using DRFC
  cleanroom laser
• preparation 1 month technician 1 month
  expert, 1 k material
• 150 measurements on tiles still on tile
  carrier in a few days
• safety aspects to clarify.
• Alternatives a) Detritiation laser, if usable
  for that purpose.
• b ) for thicker deposits 30 k for modulated
  laser 6 month preparation (ITER).
• c) gt 6 months later off site with fewer
  samples with existing collaborations.
• Determination of optical properties of target
  with and without deposits
• Interesting for simulation of IR images (JMT) on
  6 detached tiles, 6 months after dismanteling.
• Possibility (Vis/NIR only) by existing
  collaboration with PROMES-CNRS (DH).
• More interesting proposal new collaboration
  for (VUV IR) on this subject with CEA-CESTA
  (JPL).
• Improvement of in situ diagnostics
• A) Fibres (broken ZrF4 fibre)
• To restore measurement capacity and to prepare
  active in situ thermography (ITER).
• Proposal replacement ZrF4 fibre (7 k, 3 months
  procurement), Completer option ZrF4 Si02
  monomode fibre plus optics improvement (35 k,
  12 months).
• B) Thermocouples