The reduction of uranium trioxide with calcium metal in a bomb, at elevated temperatures, provides an excellent method for making spherical uranium particles. The yields of metal are high (90 to 95$) and ~50% of the pellets are larger than 325 mesh (43 microns). Spherical uranium particles are of interest for use in a long-lived fuel element, consisting of such particles dispersed homogeneously in a matrix of a ductile, no fissionable metal or alloy.
展开▼
