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Title: Damage study for various materials at the first wall of a magnetic fusion reactor using protective liquid wall
Authors: Übeyli, Mustafa
Keywords: Radiation damage
Atomic displacement
Helium generation
Tritium breeding
Issue Date: 2008
Publisher: Elsevier Science Sa
Source: 8th International Symposium on Fusion Nuclear Technology -- SEP 30-OCT 05, 2007 -- Heidelberg, GERMANY
Abstract: A new magnetic fusion reactor design called APEX uses a liquid wall between fusion plasma and solid first wall to reach high neutron wall loads and eliminate the replacement of the first wall structure during the reactor's operation. In this paper, the radiation damage behavior of various first wall materials (W-5Re, V-4Cr-4Ti and SiC/SiC composite) was investigated in the APEX blanket where a protective liquid wall of 75% LiF-23% ThF4-2% (UF4)-U-233 was considered. Tritium breeding potential of this salt with respect to the investigated structural materials was also examined in this blanket. Neutron transport calculations were carried out with the aid of the code, SCALE4.3 by solving the Boltzmann transport equation. Computations were performed with respect to the liquid wall thickness to determine the effective thickness satisfying both the radiation damage and the tritium breeding criteria. Numerical results showed that the flowing wall consisting of 75% LiF-23%ThF4-2% (UF4)-U-233 With a thickness of similar to 35 cm and similar to 50 cm would be required to extend the lifetime of the first wall to similar to 30 years and to supply sufficient tritium to the (DT) fusion driver for W-5Re and V-4Cr-4Ti, respectively whereas, SiC/SiC composite would require a flowing wall thickness of >60 cm to comply with both the damage and the tritium limits. (C) 2008 Elsevier B.V. All rights reserved.
ISSN: 0920-3796
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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