THERMAL FATIGUE TESTING OF AN ITER PRIMARY WALL SMALL-SCALE MOCK UP

A first primary wall small scale mock up with beryllium as the armor m aterial was manufactured by hot isostatic pressing (HIPing) by CEA and tested at the electron beam test facility JUDITH. The mock up consist ed of a 9.4 mm thick beryllium armor joint onto a 20 mm thick dispersi on strengthened copper (DS-Cu) alloy plate. Type 316L Stainless Steel tubes, 10/12 mm in diameter were embedded in the DS-Cu, which was subs equently joined onto a 30 mm thick 316LN stainless steel plate. The mo ck up was tested under a surface heat flux of 2.5 MW m(-2) for 100 pre paratory cycles and 900 cycles of 30 s heating and 30 s cooling time. At the end of the 1000 cycles, the surface and the Be/DS-Cu joint of t he mock up did not show any damage due to the fatigue test. (C) 1998 E lsevier Science S.A. All rights reserved.