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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.
Manasi Goswami, Sanjay Gupta, Feroz Ahmed
Nuclear Science and Engineering | Volume 133 | Number 3 | November 1999 | Pages 342-349
Technical Note | doi.org/10.13182/NSE99-A2094
Articles are hosted by Taylor and Francis Online.
In view of the blanket design of a futuristic deuterium-tritium fusion reactor, a time-dependent study of 14-MeV neutrons has been carried out in bare lithium and Li2O blanket assemblies with different concentrations of 6Li nuclei. For assemblies of different sizes, time-dependent total neutron fluxes, a tritium production rate (TPR), and a tritium breeding ratio (TBR) up to 40% concentration of 6Li (natural concentration being 7.42 at.%) have been reported. A multigroup diffusion equation and eigenfunction expansion method has been used. This study shows that for any concentration of 6Li, the values of TPR as well as TBR are higher for a Li2O assembly than those obtained for all corresponding (of same size) assemblies of lithium. However, for a given assembly of lithium or Li2O, the TBR values do not show any observable change with 6Li concentration beyond ~40%. Further, for any concentration, the values of TPR and TBR decrease substantially in both types of systems as the side of the cubic assembly is reduced from 1 to 0.5 m.