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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.
Douglas W. Stamps
Nuclear Science and Engineering | Volume 142 | Number 2 | October 2002 | Pages 237-243
Technical Note | doi.org/10.13182/NSE02-A2304
Articles are hosted by Taylor and Francis Online.
A series of experiments was conducted in a right circular cylinder to determine the flow pattern that develops when air circulates from the drag induced by falling water sprays. Two different flow patterns were visually observed and recorded by the distribution of spray mass flux. In one pattern, the airflow took the form of a single three-dimensional toroidal vortex with the air flowing up the sides of the container and down the center thereby concentrating the water sprays in the center of the container. The toroidal vortex was an unstable flow pattern unless the water spray was uniformly distributed along the ceiling. The second pattern was stable and took the form of a single nearly two-dimensional stationary roll with the air flowing up one side of the container and down the other thereby concentrating the water sprays along the downflow side. As the water pressure in the nozzles was increased, the roll did not remain stationary but rotated slowly about the central vertical axis of the container.