1174 / 2019-10-30 10:06:03

Nickel nanofibers prepared by electrospinning work as high efficiency filter for Tritium-containing dust in the Fusion reactor

全体主题 > 聚变材料与技术

In a fusion reactor such as (International Thermonuclear Experimental Reactor (ITER) or China Fusion Engineering Test Reactor (CFETR), the plasma-facing components (PFCs) and divertor made of tungsten will be sputtered by the hydrogen isotopes plasma and generate amounts of radioactive aerosol. The conventional way to recover the hydrogen isotopes from tungsten dust is to filter and heat up the powders together. In this paper, we prepared the nickel nanofibers which could applied to the recovery of residual hydrogen isotopes such as tritium for a fusion reactor by electrospinning a precursor of NiAc/PVP solution. The preferable crosslinking between nanofibers was formed during calcination process in a vacuum furnace and the fibers with average diameter of 300nm were lapped together to form a nanofibers thin membrane. Due to the Knudsen number for the electrospun nanofibers usually falls into the transition flow regime, the gas slip effect of nanofibers are significant. Therefore, the nickel nanofibers onto a thinner stainless steel fiber mat were potential to increase the filtration efficiency without increasing the pressure drop for the filtration.