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First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
A. Hawighorst, H. Kröning, F. Mayinger
Nuclear Science and Engineering | Volume 88 | Number 3 | November 1984 | Pages 376-385
Technical Paper | doi.org/10.13182/NSE84-A18591
Articles are hosted by Taylor and Francis Online.
At an unhealed 4 × 4 rod bundle air/water test facility, optical investigations of the entrainment behavior and countercurrent flow experiments were performed under a large variety of test conditions: flow duct geometry; internals (tie plate, bundle length, number of grid spacers, rod diameter); type of injection (different nozzles, porous sinter metal) different mass flux for air and water. In addition, several flooding models were compared with experimental data. It was found that the type of injection has only a weak influence, whereas the geometric conditions upstream of the narrowest flow area (presence of bundle and grid spacer) have an important effect on the flooding behavior. In addition, a comparison of the applicability of different flooding models shows that only the models based on dimensionless numbers expressed by superficial velocities show a good agreement with experimental data.