Testing of high heat flux components manufactured by ENEA for ITER divertor

Eliseo Visca, F. Escourbiac, S. Libera, A. Mancini, G. Mazzone, M. Merola, A. Pizzuto

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Abstract

ENEA is involved in the International Thermonuclear Experimental Reactor (ITER) R&D activities and in particular in the manufacturing of high heat flux plasma-facing components, such as the divertor targets. During the last years ENEA has manufactured actively cooled mock-ups by using different technologies, namely brazing, diffusion bonding and HIPping. A new manufacturing process that combines two main techniques PBC (Pre-Brazed Casting) and the HRP (Hot Radial Pressing) has been set up and widely tested. A full monoblock medium scale vertical target, having a straight CFC armoured part and a curved W armoured part, was manufactured using this process. The ultrasonic method was used for the non-destructive examinations performed during the manufacturing of the component, from the monoblock preparation up to the final mock-up assembling. The component was also examined by thermography on SATIR facility (CEA, France), afterwards it was thermal fatigue tested at FE200 (200 kW electron beam facility, CEA/AREVA France). The successful results of the thermal fatigue testing performed according the ITER requirements (10 MW/m2, 3000 cycles of 10 s on both CFC and W part, then 20/15 MW/m2, 2000 cycles of 10 s on CFC/W part, respectively) have confirmed that the developed process can be considerate a candidate for the manufacturing of monoblock divertor components. Furthermore, a 35-MW/m2 Critical Heat Flux was measured at relevant thermal-hydraulics conditions at the end of the testing campaign. This paper reports the manufacturing route, the thermal fatigue testing results, the pre and post non-destructive examination and the destructive examination performed on the ITER vertical target medium scale mock-up. These activities were performed in the frame of EFDA contracts (04-1218 with CEA, 93-851 JN with AREVA and 03-1054 with ENEA). © 2009 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)309 - 313
Number of pages5
JournalFusion Engineering and Design
Volume84
Issue number2-6
DOIs
Publication statusPublished - Jun 2009
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Materials Science(all)
  • Nuclear Energy and Engineering
  • Mechanical Engineering

Cite this

Visca, E., Escourbiac, F., Libera, S., Mancini, A., Mazzone, G., Merola, M., & Pizzuto, A. (2009). Testing of high heat flux components manufactured by ENEA for ITER divertor. Fusion Engineering and Design, 84(2-6), 309 - 313. https://doi.org/10.1016/j.fusengdes.2008.12.087