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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.
Hidematsu Ikeda, Naotake Katoh
Nuclear Technology | Volume 118 | Number 1 | April 1997 | Pages 32-41
Technical Paper | Kiyose Birthday Anniversary Special / Enrichment and Reprocessing System | doi.org/10.13182/NT97-A35354
Articles are hosted by Taylor and Francis Online.
An application of a modern control to a pulsed column is considered. Experimentally, a finite time settling control (FTSC) with finite time settling observer (FTSO) algorithms as a modern control scheme for a single loop controller of pulsed columns was selected. The FTSC with FTSO algorithms in this study was based on the step response pattern such as the dynamic behavior for the transfer function. The control objective was to keep the solute concentration in the product stream. First, the control system was designed from the measurement data of a step response using 30% trin-butylphosphate in a kerosene-acetic acid-water system. Then, the control algorithms were applied to the Purex liquid system using the published experimental data of uranium concentration during a transient operation. The controllabilities of pulsed columns are discussed in the direct digital control simulation studies.
