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Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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Latest News
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.”
William D. Hinkle, Henri Fenech
Nuclear Science and Engineering | Volume 87 | Number 1 | May 1984 | Pages 2-12
Technical Paper | doi.org/10.13182/NSE84-A17440
Articles are hosted by Taylor and Francis Online.
The results of an experiment on adiabatic annular air-water flow are described and analyzed to predict the gas/liquid film interaction and the dispersed mass flow rate of liquid. The experiment was conducted in a 1.262-cm-i.d. vertical tube, 426.72 cm long with upward flow. Several tests were conducted within a range of air mass flow rates of 23 to 144 kg/h, water mass flow rates of 46 to 237 kg/h, and inlet pressure of 276 to 620 kPa at 2°C. The pressure drop and the dispersed and film water mass fractions along the tube were measured. To obtain the wave velocity distribution, the wave disturbance length, and wave frequency, 3000 frame/s films were analyzed. The mass fraction of dispersed liquid transported by the gas is correlated as a function of static pressure drop, total mass flow rates of air and water, and distance from the water injection location. The analysis and correlation of the experimental results indicate that to a good approximation, the net rate of water mass transport from the film is proportional to the rate of shear energy transferred from the dispersed phase to the disturbance area of the waves. The rate of liquid droplet redeposition on the liquid film was assumed to produce an equal mass rate of liquid dispersion by “splashing.” The correlation fits the present experimental data with a ±30% band.