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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.
Philip T. Choong, Edward A. Mason
Nuclear Technology | Volume 19 | Number 3 | September 1973 | Pages 165-173
Technical Paper | Radioisotope | doi.org/10.13182/NT73-A15878
Articles are hosted by Taylor and Francis Online.
Thermal analysis of the temperature distribution around a spinning shell under solar radiation indicated that the resultant asymmetric temperature distribution is capable of generating sufficient thermal reradiative force to stabilize small solar probes. The steady-state normal component of this force at optimum spin is barely adequate to damp out the precession of a small solar probe. This study showed that, by coating the shell surface with a radioisotopic heat source, the useful thermal reradiation force is only increased moderately. However, the optimum spin can be shifted upward by an order of magnitude to a spin range where the attitude of the spacecraft is relatively insensitive to small disturbances. By coating the shell surface with the subliming material, the sublimation force acting on the shell is increased enormously. The numerical techniques developed to solve the inherently two-dimensional transient heat flow equation having nonlinear boundary conditions appeared to be numerically stable.