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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.
Charles R. Marotta
Nuclear Technology | Volume 42 | Number 3 | March 1979 | Pages 350-352
Technical Note | Reactor | doi.org/10.13182/NT79-A32192
Articles are hosted by Taylor and Francis Online.
A simple and accurate calculation method is presented for the variation of bubble worth in a molten core. The method depends on previous analysis of the author on reactivity increase due to compaction of unmoderated fissile systems. The average density of the fuel material after it has expanded into the bubble region is the controlling parameter of the proposed method. Comparison with detailed bubble worth calculations due to Nicholson and Goldsmith shows excellent agreement. Given a “quality” base worth case, the bubble worth variation for the perturbed system (of fuel, either moving into or out of the bubble volume) can be accurately calculated in terms of the base worth value. The proposed method can be used to evaluate the physical reasonableness of complex calculations using transport theory or Monte Carlo for estimates of bubble worth.