Thermocyclic tests of the divertor plate mock-ups for the ITER reactor

✍ Scribed by V.R. Barabash; R.N. Giniyatulin; V.L. Komarov; Yu.G. Prokofiev; D.L. Miloslavsky; I.V. Mazul; G.L. Saksagansky; V.K. Korontsevich; V.F. Khorunov; S.A. Fabritsiev

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 539 KB
• Volume: 18
• Category: Article
• ISSN: 0920-3796
• DOI: 10.1016/0920-3796(91)90121-6

✦ Synopsis

The carbon-based materials CBM-copper, CBM-molybdenum and tungsten-copper types of joining are considered as reference design elements for the ITER reactor divertor plates. The results of the thermocyclic durability tests of the various types of mock-ups are presented. An electron beam facility with a total power of 60 kW was used as heat source.

Two types of mock-up were tested. The testing of passively cooled mock-up was performed in regimes (q = 20 MW/m 2, t = 0.3-0.5 s) simulating a steady state heat load of 10. MW/m 2. The results have shown that brazing alloy Cu-Ga does not provide the sufficient durability resistance for CBM-Cu mock-up, for W-Cu joints the Cu-Mn-Fe-Ni-Si brazing alloy is most appropriate.

Actively cooled W-Cu type mock-ups have been tested at q = 10 MW/m z, tpuls e = 10 s. Visible damages (gaps, cracks) and changes in the temperature distribution after 2x 103 cycles have not been found. The CBM-Mo monoblock type mock-ups have been tested at q = 10-15 MW/m 2, those mock-ups survived for thermal cycles up to 102. Metallographic studies of the joints have been performed.