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AbstractAbstract
[en] In December 2005, the new procurement allocation plan of the ITER components among the seven Parties was prepared. The need to qualify for procurement of the specific components was especially introduced in the document. The main features and milestones of the qualification program are described in '' Procurement Plan '' for each specific component. The management rules for cases of failure in the qualification are also documented in the Procurement Plan. Due to the complicated features of FW procurement (by 6 Parties: CN, EU, JA, KO, RF and US), the procurement document has to be developed precisely. To guarantee high quality of 1700 FW panels produced by 6 different Parties, a qualification program is essential. The qualification mock-up is 80 mm wide, 240 mm long and 81 mm thick with 3 beryllium tiles 10 mm thick. Three identical mock-ups will be fabricated by each of the 6 Parties in 2006-2007 with the same method as for the ITER first wall panels. Heat load tests will be performed on the qualification mock-ups in 2007 in EU and USA facilities. During the testing, the coolant velocity is reduced to 1-2 m/s instead of 4.5 m/s to simulate the nuclear heating. The cycle time of the test will be ∼ 4 minutes. When the heat flux is increased by ∼ 40 %, the cycle time can be ∼90 sec according to thermal and stress analysis. The maximum design heat load on the ITER FW is 0.5 MW/m2 (steady state) x 30,000 shots. The heat load due to NB shine-through to achieve H-mode plasma during the hydrogen phase will be 1 MW/m2 in a certain area of the outboard equatorial region (total 1,000 shots for 2.5 years). The maximum heat flux due to MARFE: 0.5-1.4 MW/m2 (up to 10 sec duration) also needs to be taken into account in the heat load test conditions. Mechanical tests of joints are also required using standardized methods. Only Parties which have satisfied the acceptance criteria of the qualification tests can proceed to the procurement stage of the ITER FW. Semi-prototypes (roughly 1000 mm x 200 mm) are also requested before the ITER FW manufacturing. As a part of the qualification program, Parties have proposed '' new materials '' to be qualified, such as new beryllium materials, cast CuCrZr, powder HIPed CuCrZr and 316 L(N). New beryllium materials shall be tested together with the reference material S65C for comparison. Irradiation tests of the new beryllium materials will be required (unless very similar materials are already irradiated). (author)
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Warsaw University of Technology, Warsaw (Poland). Funding organisation: AREVA, rue Le Peletier 27-29, Paris Cedex 09 (France); 515 p; 2006; p. 19; 24. Symposium on Fusion Technology - SOFT 2006; Warsaw (Poland); 11-15 Sep 2006; Also available from http://www.soft2006.materials.pl. Will be published also by Elsevier in ''Fusion and Engineering Design'' (full text papers)
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