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Preliminary Study of Frequency-Variable Vibration Packing Fabrication for Atomized Metallic Particulate Fuel Using Surrogate Spherical Powder

Kim Ki-Hwan, Ha Seong-Jun, Park Sang-Gyu, Kuk Seoung-Woo, Park Jeong-Yong

Archives of Metallurgy and Materials

2021

Vol. 66, iss. 4

1043--1047

An alternative fabrication method for metallic fuel in Gen-IV reactor was introduced with vibration packing of nuclear fuel particles to facilitate remote fabrication in a hot cell and reduce the generation of long-lived radioactive wastes. Vibration packing experiments on metallic particulate fuel using a surrogate 316L stainless steel powder were done to investigate the packing density and the uniformity of the simulated fuel according to the filling method and the vibration condition. Metallic particulate fuel filled with a pre-mixed power over all particles had the highest packing fraction and the most uniform distribution among the filling methods. The vibration packing method showed that it could fabricate the metallic particulate fuel having uniform distribution of spherical fuel particles through the adjustment of the filling method of the metallic powder and the vibration condition of the metallic particulate fuel.

Magnetization and structure of Fe-Al powders.

Fujii M., Saito K., Wakayama K., Kawasaki M., Yoshioka T., Isshiki T., Nishio K., Shiojiri M.

Inżynieria Materiałowa

1998

R. XIX, nr 4

860-863

A few micrometers-sized Fe1-xAlx (x=0.35-0.42) powders prepared by atomizing method have the B2 structure and are paramegnetic. The powder milled for several hours is magnetized and has a spontaneous magnetization as great as 100 emu/g. The milled powder particles become flakes, which are composed of lamellae expanding parallel to the (110) plane and having heavily distorted lattice. High-resolution transmission electron microscopy and electron diffraction revealed that structures appear in very thin areas within the lamellae. These superlattices indicate the creation of large number of antiphase boundaries, which induce ferromagnetism. When the milled powder is heated at 100-400 degrees centigrade the magnetization decreases to a few tens emu/g, the lamella structures being kept.