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Studies in Spectral Neutron Flux Synthesis

Harold Greenspan

Nuclear Science and Engineering

Volume 50 / Number 1 / January 1973 / Pages 75-78


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A study has been made to evaluate two aspects of the spectral synthesis method as formulated by Lorenzini and Robinson: (1) evaluation of spectral synthesis, relative to group collapsing, in terms of computational time, and accuracy for typical liquid metal fast breeder reactor problems; and (2) the numerical procedures used in solving the equations in two-dimensional geometries. Three trial spectra were used in the spectral synthesis method; the few-group calculations were done with 3, 4, and 8 groups collapsed from a 24-group set. Results were obtained and compared for Keff, breeding ratios, fractional power in regions, and power distributions.

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