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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.
P. K. Job, M. Srinivasan, V. R. Nargundkar
Nuclear Technology | Volume 51 | Number 1 | November 1980 | Pages 87-96
Technical Note | Reactor | doi.org/10.13182/NT80-A32560
Articles are hosted by Taylor and Francis Online.
A series of subcritical multiplication experiments was conducted at Purnima Laboratories, Trombay, on a thick BeO-reflected 233U (98.2 wt% enrichment) uranyl nitrate solution system. The core tank was a rectangular parallelepiped of 0.11− × 0.11−m2 sectional area attached to the bottom of a glove box. Multiplication measurements were carried out with uranyl nitrate solutions in the uranium concentration range of 25 to 150 kg/m3 corresponding to H/233U ratios in the range of 1200 to 200. The maximum quantity of 233U-enriched uranium used was 0.12 kg and the corresponding multiplication was ∼5. Boric acid solutions, equivalent in terms of thermal-neutron absorption to the uranium solutions, were used to eliminate the unmultiplied neutron background and to calibrate the neutron detection system. Extrapolated critical heights determined from plots of inverse multiplication were used to obtain the keff of the subcritical assembly with the help of the Trombay Criticality Formula. Absolute multiplication and keff were also deduced independently from the observed multiplication data relative to a reference dummy core. The experimental keff results are found to be in good agreement with detailed transport theory and Monte Carlo calculations.