Fabricating tritium permeation barrier for PFC with a new non-coating strategy

Author:

Wang LuORCID,Zhou Hai-ShanORCID,Liu Hao-DongORCID,Xu Yu-PingORCID,Wang Wan-Jing,Li Yan-Fen,Luo Guang-NanORCID

Abstract

Abstract Tritium (T) permeation through plasma-facing component (PFC) into the coolant is a major concern of fusion reactor operation. In this work, deuterium (D) permeation through CLAM steel, CLAM/CLAM and CLAM/Fe-Cr-Al samples prepared by hot isostatic pressing (HIP) are tested in a linear plasma device. Only the downstream surfaces of the samples are oxidized with controlled atmosphere to form permeation barrier. No significant effect on D diffusion and penetration can be observed for the joining interfaces, while the dense oxide layer at the downstream side plays an important role in suppressing D permeation. The downstream surface oxidization of CLAM/Fe-Cr-Al is found to effectively reduce D permeation flux by a factor up to 1000.

Funder

Science Foundation of Institute of Plasma Physics, Chinese Academy of Sciences

Youth Innovation Promotion Association of the Chinese Academy of Sciences

National Natural Science Foundation of China

National Magnetic Confinement Fusion Program of China

Publisher

IOP Publishing

Subject

Condensed Matter Physics,Mathematical Physics,Atomic and Molecular Physics, and Optics

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