Association Euratom-CEA TORE SUPRA Tore Supra limiter sector dismantling project [email protected]/12/061/11 IR progam Outline Introduction Measurement.

Tore Supra limiter sector dismantling project [email protected] 8/12/06 1/11

AssociationEuratom-CEA TORE SUPRAIR progam

Outline

Introduction

Measurement of thermal and optical properties of deposited layers and erosion zonesConditions of analysisDetermination of thermal propertiesMeasurement of BRDF (Bidirectional Reflectivity Distribution Function)

In situ diagnostics on sector 6AFibresThermocouples

Conclusion

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)

Tore Supra limiter sector dismantling project [email protected] 8/12/06 2/11

AssociationEuratom-CEA TORE SUPRA

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 fibreand preparation for in situ active thermography.

Thermocouples: improvement of inverse calculation of power flux and development for ITER.

Introduction: Motivations

Tore Supra limiter sector dismantling project [email protected] 8/12/06 3/11

AssociationEuratom-CEA TORE SUPRAConditions of analysis

Measurements not in the assembly hall but in dedicated laboratories. Samples and laboratories must comply to safety reglementations.

Selection 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 > 6 months.

(CB)

Tore Supra limiter sector dismantling project [email protected] 8/12/06 4/11

AssociationEuratom-CEA TORE SUPRAStatus 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:(>) 2 parameters out of 4: thermal resistance + comb. out of thickness, cond., diff.

Tore Supra limiter sector dismantling project [email protected] 8/12/06 5/11

AssociationEuratom-CEA TORE SUPRAMeasurement of thermal properties of

deposits: pulsed photothermal method

Possibilities:a) Continuation with collaboration CNRS-IUSTIb) Cleanroom laser – originally set up for speckles interferometryc) Detritiation laser

Comparison:Scope Realisation Ressources Planning

a) 6 samples proven ! SC + collab. > 2008CNRS-IUSTI

b) 150 samples laser works JLG, RD, CP,EG 05/2007must be tested 1TPY, 1PPY prep.for this purpose 1 k€ material 3 days

measurement

c) 150 samples in development JLG, HR > mi 2007 ?for other use 1 k€ material

Proposal: go for b) first, if not possible, check c) if not use a).

Tore Supra limiter sector dismantling project [email protected] 8/12/06 6/11

AssociationEuratom-CEA TORE SUPRAMeasurement of thermal properties of

deposits: other methods

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 > 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 => following presentation (AD) Frequency (~0.5 Hz) too low => only one global parameter.

d) SATIR method => following presentation (AD). As c)

Proposal: => If budget for laser can be found : b), otherwise a).

c) and d) will be done anyway.

Phase lag for deposit of 100µm, 300µm, 1000µm

Tore Supra limiter sector dismantling project [email protected] 8/12/06 7/11

AssociationEuratom-CEA TORE SUPRA

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: > 6 months cool down time of tiles.

Costs: TBD.Angle (°) +90

+60

-90

-60

+30-30

0cosn()

Before heating: n = 3.99After heating: n = 3.08

Before Heating After Heating

Tore Supra limiter sector dismantling project [email protected] 8/12/06 8/11

AssociationEuratom-CEA TORE SUPRA

Status of in situ diagnostics on cassette 6A

Fibre diagnostic: two working SiO2 fibres, one destroyed ZrF4 fibre (waterleak oct. 2002).

No thermocouples.

Tore Supra limiter sector dismantling project [email protected] 8/12/06 9/11

AssociationEuratom-CEA TORE SUPRAImprovement of in situ fibre diagnostics

1) 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€, > 6 months preparation)

b) Reduction of readout spotsize, (18 k€, ~12 months preparation).

Proposal: if budget and planning for 05/2007: 1botherwise: 1aif more time and more money: 1b + 2a + 2b

Tore Supra limiter sector dismantling project [email protected] 8/12/06 10/11

AssociationEuratom-CEA TORE SUPRA

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)

Temperature measurements for thermal inverse methods validation

T°entréeT°sortie

eau

eau

Tore

Limiteur

Pincidente

PinjectéePinjectée

m

m

T°entréeT°sortie

eau

eau

Tore

Limiteur

Pincidente

PinjectéePinjectée

mm

mmcollecteur

T outlet 2 fingersTC imbedded

in the finger

(MC,SC)

Tore Supra limiter sector dismantling project [email protected] 8/12/06 11/11

AssociationEuratom-CEA TORE SUPRAConclusions

Determination of thermal properties of depositsConcerns 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€ material150 measurements on tiles still on tile carrier in a few dayssafety 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) > 6 months later off site with fewer samples with existing collaborations.

Determination of optical properties of target with and without depositsInteresting 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 diagnosticsA) 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) ThermocouplesFor validation of inverse method and installation technique for ITER.Proposal: 2 TC’s on cassette (15 K€ 6 months preparation)