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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.
R. D. M. Garcia
Nuclear Science and Engineering | Volume 144 | Number 3 | July 2003 | Pages 200-210
Technical Paper | doi.org/10.13182/NSE03-A2353
Articles are hosted by Taylor and Francis Online.
A new numerical method for computing first-flight collision, escape, and transmission probabilities in three dimensions is described. The method consists of subdividing the domain into parts called elements and assuming, as an approximation, that the interaction between a source element and a sink element takes place only along the path that joins their centers of mass. The calculation is repeated with the number of elements increased successively and Richardson extrapolation to an infinite number of elements applied to the sequence of results until convergence to the desired degree of accuracy is attained. Solutions to some test problems indicate that, in general, four steps of repeated Richardson extrapolation are sufficient to yield results with an accuracy comparable to that of existing codes.