Results 131 to 140 of about 476 (172)

Hydrogen permeation through tritium permeation barrier in Pb–17Li

Fusion Engineering and Design, 2001
One of the main problems in the development of water cooled lithium lead (WCLL) DEMO fusion reactor is the reduction of the tritium permeation from the Pb–17Li, or the plasma, into the cooling water. The control of tritium losses is an important issue in fusion technology because of its safety and operational implications.
E Serra
exaly   +2 more sources

Surface Barrier for Tritium Permeation

Fusion Technology, 1995
To apply the surface barrier to reduce hydrogen permeation, the influence of the surface barrier on both the permeation and retention has been investigated considering physical and chemical stability of the barrier in fusion environment Since energetic hydrogen from the plasma not only impinges directly into subsurface but also removes the front ...
Tetsuo Tanabe
openaire   +2 more sources

The use of silicon carbide as a tritium permeation barrier

Journal of Nuclear Materials, 1995
Abstract Vapor deposited silicon carbide has a very low tritium diffusivity and solubility. When these characteristics are combined with its very good thermal properties, silicon carbide appears to be an excellent tritium permeation barrier for use in fusion reactors and other applications. Calculations were performed to compare the tritium retention
Rion A. Causey, William R. Wampler
openaire   +2 more sources

Tritium permeation barriers for fusion technology

Fusion Engineering and Design, 1995
Abstract A review of the effectiveness as permeation barriers of several coatings deposited on materials of interest for fusion technology is presented. The coating materials studied were Al 2 O 3 , TiC and a bilayer of TiC/TiN deposited by pack cementation, chemical vapour deposition (CVD) and vacuum plasma spraying (VPS). Also, the effectiveness of
A Perujo, K.S Forcey
openaire   +2 more sources

The formation of tritium permeation barriers by CVD

Journal of Nuclear Materials, 1993
Abstract The effectiveness as permeation barriers of the following CVD coatings have been investigated: TiC (1 to 2 μm in thickness); a bi-layer of TiN on TiC (3 μm total thickness) and CVD A12O3 on a TiN/TiC bi-layer. The substrate materials were TZM (a Mo alloy) and 316L stainless steel in the form of discs of diameter 48 mm and thickness 0.1 or 1 ...
K.S. Forcey, A. Perujo, F. Reiter, P.L. Lolli-Ceroni   +3 more
openaire   +1 more source

Chemical compatibility between the α-Al2O3 tritium permeation barrier and Li4SiO4 tritium breeder

Surface and Coatings Technology, 2021
Abstract α-Al2O3 tritium permeation barriers were exposed in a 1-MPa He+0.5-MPa H2 atmosphere to Li4SiO4 ceramic tritium breeder at 623 K for 120–1000 h, to evaluate its chemical compatibility in a simulated breeder blanket environment. The as-deposited coating is composed of the α-Al2O3 phase with a uniform and dense surface morphology.
Wei Zhang, Changda Zhu, Jian Yang, Qingsong Chen, Long Wang, Yongjin Feng, Kaiming Feng, Jiali Liao, Yuanyou Yang, Ning Liu, Jijun Yang   +10 more
openaire   +1 more source

Status of Tritium Permeation Barrier Development in the EU

Fusion Science and Technology, 2005
Tritium permeation can be significantly reduced by a suitable barrier on the structural materials of a future fusion power plant.
Konys, J., Aiello, A., Benamati, G., Giancarli, L.   +3 more
openaire   +2 more sources

Qualification of tritium permeation barriers in liquid Pb–17Li

Fusion Engineering and Design, 2003
Abstract The reduction of tritium permeation from the Pb–17Li, or plasma, into the coolant is of crucial importance in order to reduce the radiological hazard in the steam generator vault as well as in the turbine/condenser area and to optimise the tritium balance in the reactor.
A. AIELLO, I. RICAPITO, CIAMPICHETTI, ANDREA, G. BENAMATI   +3 more
openaire   +2 more sources

Tritium permeation through austenitic stainless steel with chemically densified coating as a tritium permeation barrier

Journal of Nuclear Materials, 1994
Chemically densified coating formed on the surface of austenitic stainless steel (SUS 316) was examined for compatibility with molten lithium-lead eutectic alloy (Li17Pb83) and tritium permeability. The chemically densified coating (CDC) consisting of SiO2 particles and a Cr2O3 matrix with a thickness of 60 μm was unstable in contact with the molten ...
Takayuki Terai, Toshiaki Yoneoka, Hirohisa Tanaka, Hiroshi Kawamura, Masaru Nakamichi, Kiyoshi Miyajima   +5 more
openaire   +1 more source

Development of Ceramic Coating as Tritium Permeation Barrier

Fusion Science and Technology, 2002
The fabrication technique of Cr2O3-SiO2 coating as a tritium permeation barrier had been developed by chemical densified coating method. However, Cr2C3-SiO2 coating had open pores in the coating.
M. Nakamichi, H. Kawamura, T. Teratani
openaire   +1 more source