Speaker
Igor Kupriyanov
(Beryllium Department)
Description
The primary reasons for the selection of beryllium as an armour material for the ITER first wall are its low Z and high gettering characteristics. For this application three beryllium grades: S-65C (USA), TGP-56FW (Russia) and CN-G01 (China) have been accepted. This selection was based on the results of the ITER Qualification Program, which included characterization and testing of material performances at transient heat loads. Russia is responsible for manufacturing of 40 % FW panels of ITER Blanket. Present FW design assumes that the FW panels will be coated with the beryllium flat tiles of 8-mm thickness. In the Russian share about 60 % of panels will be made of TGP-56FW beryllium that corresponds to ~2400 kg of Be tiles.
This paper presents a progress of R&D activities on the development and improvement of manufacturing technology of the tiles made of TGP-56FW beryllium and also some actions aimed on the preparation of mass production. Necessity of the improvement has been caused by the tile dimensions change due to tightening of the requirements to the FW panels because the expected cyclic thermal loadings were reconsidered from 1 to 5 MW/m22. During the preparation to mass production the line for a high purity beryllium powder fabrication has been upgraded, new pressing equipment for CIP and VHP has been mounted and commissioned, the electric discharge machine has been installed and the procedures of quality control have been revised and improved. The experimental batches of billets and tiles have been manufactured using improved technology.
Additionally, this paper presents the results of comparative study on influence of transient plasma heat loads with the energy density of 0.3-1.0 MJ/m22 at 250-500ooC (performed in QSPA-Be facility), on the erosion and surface damage of beryllium tiles made of TGP-56FW grade and S-65C grade.
Co-authors
G. Gorayev
(FSUE Bazalt, Saratov region, Russian Federation)
G. Nikolaev
(Beryllium Department, A.A. Bochvar High Technology Research Institute of Inorganic Materials (JSC VNIINM), Rogova St. 5a, Moscow, Russian Federation)
Igor Kupriyanov
(Beryllium Department, A.A. Bochvar High Technology Research Institute of Inorganic Materials (JSC VNIINM), Rogova St. 5a, Moscow, Russian Federation)
R. Giniatulin
(Efremov Research Institute, S.-Peterburg, Russian Federation)
