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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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New coolants, new fuels: A new generation of university reactors
Here’s an easy way to make aging U.S. power reactors look relatively youthful: Compare them (average age: 43) with the nation’s university research reactors. The 25 operating today have been licensed for an average of about 58 years.
E. M. Sparrow, R. P. Heinisch, H. S. Yu
Nuclear Science and Engineering | Volume 39 | Number 3 | March 1970 | Pages 387-393
Technical Paper | doi.org/10.13182/NSE70-A19999
Articles are hosted by Taylor and Francis Online.
An analytical study is performed to determine the threshold value of the Peclet number below which conventional Nusselt number relations are invalidated by the effect of streamwise heat conduction. The investigation encompasses the Prandtl number range of liquid metals. Consideration is given to pure forced-convection boundary layer flow on a flat plate and to the forced-convection boundary layer on a vertical plate with superposed free convection. If Pex, Rex, and Grx, respectively, denote the Peclet, Reynolds, and Grashof numbers, all based on the streamwise coordinate x, then the threshold value of Pex is found to range from 12 to 7 as Grx/Rex2 ranges from 0 (pure forced convection) to 1.0. The present analysis does not provide Nusselt number results for very low Peclet numbers, where streamwise conduction effects play a decisive role.
