During this report period, a 109 1b ingot of high purity vanadium was processed :by commercial•melting techniques. Feedstock for the process was vanadium •metal produced by aluminothermic reduction of V205. Two. puri fication .
During this report period, a 27.1 pound high purity vanadium ingot was produced using commercial melting equipment and techniques. However, this ingot does not meet the target requirements of the program in that the interstitial content » is high, and the ingot too small. As specified for this program, the target impurity levels are 0 1300, N 1100 and C < 100 ppm with a final ingot weight of approximately 100 pounds.. Chemical analysis on the 27 pound ingot showed generally a high nitrogen content (approximately 300 ppm) with the remaining impurity elements within the target values. .Although
Further analyses have been performed on a U02-B4C fuel element which was thermally tested under both radial and axial thermal gradients. A new sampling technique was employed which permitted the division of radial samples into smaller volumes of material than was previously used for boron analyses. With this technique, the boron losses, predicted for open systems, was observed, especially in that region of the fuel which was operating above 13500C, No significant boron migration was detected in either the radial or axial directions in the fuel element, indieating that the boron losses were carried off in the flowing helium stream, verifying earlier results in open systems.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.