Associazione EURATOM- ENEA sulla Fusione 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. Neri a Working team: G. Baccarelli a , L. Bartolini a , F. Bonaccorso c , B. Brichard d , G. Ciccone a ,G. Caivano a , A. Coletti a ,P. Costa a , C. Correia b , N. Cruz b ,M. Florean a , G.Fornetti a , M. Ferri a , A. Lo Bue a , S. Lupini a , F. Massaioli c ,G. Mugnaini a , C.Nardi, C. Neri a , R. Pereira b , M. Pillon a , F. Pollastrone a , M. Riva a , P. Rossi a , L. Semeraro a , C. Talarico a . a Associazione EURATOM ENEA Frascati, Rome b Instituto Superior Te´cnico, Lisboa, Portugal c Consorzio CASPUR, Rome, Italy d SCK-CEN, Mol, Belgium
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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. - PowerPoint PPT Presentation
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Associazione EURATOM-ENEA sulla Fusione
Attività di Remote Handlin per ITER C.R. FrascatiIL SISTEMA DI VISIONE/INSPEZIONE DI ITER
Remote Handling per ITER: requisiti tecnici e overview delle forniture europeeENEA C. R. Frascati 26 Febbraio 2010
Presented by C. Neria
Working 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, Portugal c Consorzio CASPUR, Rome, Italyd SCK-CEN, Mol, Belgium
Associazione EURATOM-ENEA sulla Fusione
•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.
The ITER IVVS probe environmental conditions:
• operate in ITER vacuum conditions (5 x10-4 Pa)
5KGy/h5KGy/h
10 MGy10 MGy
120/240°C120/240°C
8 Tesla8 Tesla
UHVUHV
IVVS viewing performanceSpatial resolution better than 1mm at target distances of 0.5m-4m and better than 3mm at target distances up to 10m. Metrology performanceMetrology with a reference accuracy of better than ±0.5mm at 5m target distance.
ITER in vessel viewing requirement and environmental conditions
• 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
Associazione EURATOM-ENEA sulla Fusione
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)
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.
Associazione EURATOM-ENEA sulla Fusione
The dose rate was of 15.24 kGy/hwas reached a total dose of 2469 kGy.
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.
Associazione EURATOM-ENEA sulla Fusione
IVVS system Outline
OPTICAL ENCODER
PASSIVE MODULE
MOTORDRIVERS
ACTIVEMODULE
ENCODERELECTRONICS
(TWO ENCODERS)
RADARELECTRONICS
VME CONTROL &ACQUISITION SYS
VISUALIS.SYSTEM
TILT/PAN MOTORSOPTICAL FIBERS
OPTICAL FIBERS
LASER BEAM
PRISM
INSTRUM. SENSORS DRIVER
Associazione EURATOM-ENEA sulla Fusione
• 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.