Fusion Programme - ENEA - Fusione

3. Technology Programme2007 Progress ReportAccelerator Facility of the Troisk Institutefor Innovation and Fusion Research (taskTW4-TPP-TARCAR). Figure 3.2 shows ametallographic cross section and theprofilometry for a W tile. Themetallography shows some crackspresent in the region within the footprintof the plasma beam. The cracks areabout 500 µm long and correspond tomacroscopic cracks visible on thesurface. As expected, a much morecomplicated pattern was found in theCFC tiles and work is in progress toidentify the characteristics. For both Wand CFC tiles, the effects of the plasmabeam are difficult to recognise due to theunavailability of pre-exposure ceramo-(metallo-)graphic analyses.Fig. 3.1 – W monoblock mockups manufactured by HRPEngineeringDesign Activities:VI test campaignCharacterisationof ITER primaryfirst-wall panelsunder thermalfatigue cycles.Thermal fatiguetesting of the mockups of the primaryfirst-wall (PFW) panel underITER–relevant operating conditions(temperature and thermal flux) continuedunder the Engineering Design Activities(EDA) VI campaign. The aim of the workis to qualify beryllium (Be)-metallicheatsink (Cu alloys)-austenitic steel 316Ljoints made by hot isostatic pressing.The 30000 thermal fatigue cyclesplanned should be concluded in spring2008. The main characteristics of theEDA-BETA experimental setupconnected to the ENEA BrasimoneCEF 2 water loop (fig. 3.3) for mockupcooling are recalled in table 3.I (see 2006Progress Report).+10.9571μm-10.06261.87mm053.48 mm 55.47Fig. 3.2 - Metallographic cross section (relative to red line) and profilometry(relative to yellow square) for a tungsten tileFig. 3.3 - CEF loop for the experimentalcampaign of ITER PFW panel mockup41