Abstracts and Available Papers Presented at the 2005 International RERTR Meeting
(COATED PARTICLES) AND MONOLITHIC (ZIRCALLOY-4 CLADDING)
Enrique E. Pasqualini
Lab. Nanostructures. UACN
CNEA. Buenos Aires. Argentina
Uranium 7% (w/w) molybdenum (U-7Mo) particles were
coated with silicon base material. Chemical vapour
deposition (CVD) of silane and high temperature contact
diffusion (HTCD) of silicon processes were employed.
Hydrided, milled and dehydrided (HMD) particles annealed
and centrifugal atomized powder were coated and the
results compared. Miniplates were elaborated with both
kinds of particles.
A third type of miniplate was elaborated
incorporating silicon powder in the initial blending of
the U-7Mo and Al powders instead of using an alloyed
Monolithic miniplates of U-7Mo with zircaloy-4
cladding were also fabricated by hot rolling. The
different steps of this picture and frame process are
detailed and the method is shown to be versatile, can be
easily scaled up, is performed with small modifications
of usual equipment in fuel plants and seams to be a
possible alternative for high flux reactors conversion
from HEU to LEU fuels.