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Conference Spotlight
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.
Joel Adir and John R. Lamarsh
Nuclear Science and Engineering | Volume 35 | Number 1 | January 1969 | Pages 14-26
Technical Paper | doi.org/10.13182/NSE69-A21111
Articles are hosted by Taylor and Francis Online.
A new analytical method is presented for computing the thermal utilization of a noncylindrical unit cell containing a cylindrical fuel rod. No cylindrization of the cell is required. The boundary condition at the outer edge of the cell is formulated in terms of a procedure that minimizes the square of the neutron current at a number of unspecified points along the edge. This leads to rapid convergence in computations of the thermal utilization, even with tightly packed lattices for which previous methods may not converge. The method is used to derive specific formulas for the thermal utilization using diffusion theory; the method of Amouyal, Benoist, and Horowitz; and, finally, the PN method with anisotropic scattering. Sample computations using these models are also presented.