Title :
Progress in manufacturing and testing of a first wall mockup for NET/ITER
Author :
Avanzini, P.G. ; Brossa, M. ; Guerreschi, U. ; Adorno, G. Persano ; Pietranera, N. ; Rosatelli, F. ; Simbolotti, G. ; Zampaglione, V.
Author_Institution :
Ansaldo SpA, Genova, Italy
fDate :
30 Sep-3 Oct 1991
Abstract :
The proposed first wall (FW) for the NET/ITER (Next European Torus/International Thermonuclear Experimental Reactor) consists of a box structure, made of stainless steel, with an active cooling of the side facing the plasma by a flow of water through the tubes inserted into it. An innovative brazing process to improve the quality of the brazed joints between cooling tubes and plates has been developed and optimized within the framework of NET technological task PDT 1.2. The brazing technique is based on creep expansion of the tubes during the high-temperature holding time of the brazing treatment, which minimizes the gap that was initially present around the tubes. A flat, mockup FW panel with plate dimensions 622×216×33 mm and with eight cooling tubes was built using this technique. Thermal fatigue tests are scheduled to be carried out in the near future on this mockup. An automatic, computerized procedure for the nondestructive examination, of the brazed joints using ultrasonic probes has also been developed
Keywords :
brazing; creep testing; fusion reactor materials; fusion reactor theory and design; ultrasonic materials testing; NET/ITER; Next European Torus/International Thermonuclear Experimental Reactor; PDT 1.2; active cooling; box structure; brazing process; computerized procedure; cooling tubes; creep expansion; first wall mockup; high-temperature holding time; manufacturing; nondestructive examination; plasma; stainless steel; testing; ultrasonic probes; Cooling; Creep; Fatigue; Inductors; Job shop scheduling; Manufacturing; Plasma materials processing; Processor scheduling; Steel; Testing;
Conference_Titel :
Fusion Engineering, 1991. Proceedings., 14th IEEE/NPSS Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0132-3
DOI :
10.1109/FUSION.1991.218800