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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Hash Hashemian: Visionary leadership
As Dr. Hashem M. “Hash” Hashemian prepares to step into his term as President of the American Nuclear Society, he is clear that he wants to make the most of this unique moment.
A groundswell in public approval of nuclear is finding a home in growing governmental support that is backed by a tailwind of technological innovation. “Now is a good time to be in nuclear,” Hashemian said, as he explained the criticality of this moment and what he hoped to accomplish as president.
Michael C. Baker, Riccardo Bonazza
Nuclear Technology | Volume 125 | Number 1 | January 1999 | Pages 40-51
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT99-A2931
Articles are hosted by Taylor and Francis Online.
An experimental apparatus for investigating the injection of nitrogen gas and water into the base of a steel tank containing molten tin has been developed. A first set of experiments based on only gas injection has been used to develop a diagnostic technique using continuous high-energy X rays and digital imaging to observe the mixing process and to measure local and average void fractions in the test section as a function of time and space. This unique application of real-time, high-energy, X-ray imaging has been used to generate two-dimensional mappings of the chordal-average void fraction with spatial resolution corresponding to a 0.43-mm2 cross-sectional area perpendicular to the X-ray path and time resolutions of <5 ms. Void fraction measurements with superficial gas injection velocities from 0.07 to 0.14 m/s into a 0.08-m-deep pool of 683 K molten tin indicate that the time and spatial average integral void fraction at these gas injection rates is relatively constant, in the range from 0.26 to 0.31. Similar injections into pools of 0.14- and 0.15-m depths have also exhibited relatively constant average integral void fractions in the range from 0.18 to 0.26. These values are in good agreement with past integral experimental measurements in mercury, Wood's metal, and molten steel.