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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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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.
Robert E. Henry, Michael Epstein, Hans K. Fauske
Nuclear Science and Engineering | Volume 180 | Number 3 | July 2015 | Pages 312-334
Technical Paper | doi.org/10.13182/NSE14-90
Articles are hosted by Taylor and Francis Online.
The mechanisms controlling an aluminum-water steam explosion and the possibility that a significant chemical reaction could be initiated have been debated for decades. This paper investigates the influence of hydrogen gas that is generated by the steam oxidation reaction. Most of this gas diffuses to the surface, but some diffuses into the molten metal. Analyses show that at elevated aluminum temperatures sufficient hydrogen is formed to saturate the diffusion layer propagating into the liquid metal, even considering that the hydrogen solubility increases significantly with temperature. If a steam explosion is initiated, the local rapid surface cooling would cause the dissolved hydrogen to become highly supersaturated, such that it would nucleate into high pressure gas bubbles within the locally cooled outer surface of the molten aluminum globules. This high pressure source would strip a thin molten layer, which has the thickness of the cooled thermal boundary, off of the surface as fine fragments that can oxidize explosively in the surrounding environment. Based on this mechanism, a methodology has been developed and found to be in agreement with the available large-scale data regarding (a) the conditions required for the occurrence of a significant chemical component in the explosion and (b) the energy releases that occur when a steam explosion initiates a chemical explosion.