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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.
C. A. Preskitt, E. A. Nephew, J. R. Brown, K. R. Van Howe
Nuclear Science and Engineering | Volume 29 | Number 2 | August 1967 | Pages 283-295
Technical Paper | doi.org/10.13182/NSE67-4
Articles are hosted by Taylor and Francis Online.
A general description of pulsed-source experiments is developed from the time-dependent reactor equations. The interpretation of experiments is discussed, taking into account differences in shape and spectrum between the fundamental prompt and delayed modes, and the influence of prompt and delayed harmonic modes. Pulsed-source data obtained during the zero-power commissioning program of the Peach Bottom reactor are interpreted in terms of reactivity. Using an inhour analysis, good accuracy is obtained by incorporating detailed calculations into the interpretation. It is shown that the space-dependent variation of the reactivity deduced from modified pulsed-source techniques may exceed a factor of 10 in systems like the Peach Bottom reactor.
