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Attività di Remote Handlin per ITER C.R. Frascati IL SISTEMA DI VISIONE/INSPEZIONE DI ITER

Attività di Remote Handlin per ITER C.R. Frascati IL SISTEMA DI VISIONE/INSPEZIONE DI ITER Remote Handling per ITER: requisiti tecnici e overview delle forniture europee ENEA C. R. Frascati 26 Febbraio 2010.

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Attività di Remote Handlin per ITER C.R. Frascati IL SISTEMA DI VISIONE/INSPEZIONE DI ITER

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  1. Attività di Remote Handlin per ITER C.R. Frascati IL SISTEMA DI VISIONE/INSPEZIONE DI ITER Remote Handling per ITER: requisiti tecnici e overview delle forniture europee ENEA C. R. Frascati 26 Febbraio 2010 Presented by C. NeriaWorking team: G. Baccarellia, L. Bartolinia, F. Bonaccorsoc, B. Brichardd, G. Cicconea,G. Caivanoa, A. Colettia,P. Costaa, C. Correiab, N. Cruzb,M. Floreana, G.Fornettia, M. Ferria, A. Lo Buea, S. Lupinia, F. Massaiolic,G. Mugnainia, C.Nardi, C. Neria,R. Pereirab, M. Pillona, F. Pollastronea, M. Rivaa, P. Rossia, L. Semeraroa, C. Talaricoa. a Associazione EURATOM ENEA Frascati, Romeb Instituto Superior Te´cnico, Lisboa, Portugalc Consorzio CASPUR, Rome, Italy d SCK-CEN, Mol, Belgium

  2. UHV 120/240°C 5KGy/h 10 MGy 8 Tesla ITER in vessel viewing requirement and environmental conditions • The ITER In-Vessel Viewing System (IVVS) shall allow for in-vessel inspection of plasma-facing surfaces to look for possible damage caused during plasma operations. • The IVVS shall also be used for metrology measurements of the plasma chamber and its components. IVVS viewing performance Spatial resolution better than 1mm at target distances of 0.5m-4m and better than 3mm at target distances up to 10m. Metrology performance Metrology with a reference accuracy of better than ±0.5mm at 5m target distance. • The ITER IVVS probe environmental conditions: • operate in ITER vacuum conditions (5 x10-4 Pa) • operate at 120 °C and be baked at 240 °C • be inserted shortly after plasma pulses (radiation≈5kGy/hour) and withstand an integrated lifetime dose of 10 MGy • operate with a toroidal field up to 8 Tesla

  3. IVVS SCANNING HEAD Laser beam ENEA proposed and developed a prototype the Laser In Vessel Viewing&Ranging System (IVVS) based on an Amplitude Modulated (AM) laser radar and a scanning head. The system is based on an intrinsic radiation resistance concept: all the electronics and imaging equipment are external to the ITER bioshield. The scanning head optical and instrumentation components are driven by rad hard optical fibers, (excluding the ceramic motors)

  4. Gamma irradiation test on IVVS components A dedicated irradiation test was performed on the fiber optic optical encoder to verify the encoder under the ITER irradiation conditions. The dose rate was of 15.24 kGy/h was reached a total dose of 2469 kGy.

  5. MOTOR DRIVERS VME CONTROL & ACQUISITION SYS TILT/PAN MOTORS OPTICAL FIBERS ACTIVE MODULE PASSIVE MODULE RADAR ELECTRONICS OPTICAL FIBERS VISUALIS. SYSTEM ENCODER ELECTRONICS (TWO ENCODERS) PRISM OPTICAL ENCODER INSTRUM. SENSORS DRIVER LASER BEAM IVVS system Outline

  6. IVVS main characteristics • The system is based on an intrinsic radiation resistance concept: all the electronics and imaging equipment are external to the ITER bioshield. The scanning head optical and instrumentation components are driven by rad hard optical fibers, (excluding the ceramic motors) • The system obtains high resolution viewing images with a high dynamic range, 1 mm@4m and many thousands of grey levels. • The system is able to measure ranges and the ranging accuracy is better than 10-4 (i.e. 0.5 mm @ 5 m) • The system has a quasi-spherical Field of View. The tilt-hidden angle is about +/- 15 degrees over a full angle of 360 degrees. The pan covers 360 degrees. • The laser spot is the source of illumination itself, so that no external illumination source is necessary. • By choosing the appropriate speed of acquisition and acquisition time it is possible to obtain low resolution or medium resolution overall images or high resolution zoom images.

  7. First wall plate detail, d = 3.75 m, q =0° AMPLITUDE IMAGE RANGE IMAGE PROFILE Stay time = 3 ms  (range standard deviation) 4m Experimental results of ENEA AM laser radar prototype IVVS

  8. Experimental results of ENEA AM laser radar prototype IVVS FWP d = 3.75 m, q=0° 3D IMAGE with amplitude and CAD wire frame superimposed (Stay time= 0.36 ms s < 1mm)

  9. 50 mm Experimental results of ENEA AM laser radar prototype IVVS STL file produced by CATIA CAD of FWP STL file produced from IVVS experimental data Vertices 914 Faces 1824 Vertices 546048 Faces 1092096

  10. IVVS Insertion System

  11. IVVS in ITER Six IVVS / GDS units shall be installed. Port positions: #03 #05 #09 #11 #15 #17

  12. IVVS key technologies • Optical radars design / characterization • Rad hard optics and optical devices • Precision mechanics • Rad hard vacuum/temperature compliant no magnetic motors • Rad hard fibers radiation/vacuum/temperature compliant • passive fiber sensors: • optical encoders fiber optic driven • strain gauges, Accelerometer, inclinometer • Optoelectronics devices (lasers, modulators, detectors …) • Radar electronics , fiber sensors electronics • Image construction algorithms, image visualization/archiving .. • Nuclear characterization / qualification

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