Multigroup Diffusion Theory Calculations for Recent Critical Experiments

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In connection with the program of the measurement of eta for U/sup 233/, several critical experiments were performed with light water solutions of uranyl nitrate in an essentially bare sphere 27 inches in diameter. Results of two multigroup-diffusion-theory calculations for the above experiments are presented. Assumed cross sections, material concentrations, detailed neutron balances, and a comparison with elementary theory are included. The agreement between the calculated and experimental multiplication constants is excellent for the multigroup calculation but only fair for the elementary calculation. The latter method overestimates the fast leakage so that the computed multiplication constant is less than that … continued below

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13 pages

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Nestor, C. W. Jr. July 21, 1959.

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In connection with the program of the measurement of eta for U/sup 233/, several critical experiments were performed with light water solutions of uranyl nitrate in an essentially bare sphere 27 inches in diameter. Results of two multigroup-diffusion-theory calculations for the above experiments are presented. Assumed cross sections, material concentrations, detailed neutron balances, and a comparison with elementary theory are included. The agreement between the calculated and experimental multiplication constants is excellent for the multigroup calculation but only fair for the elementary calculation. The latter method overestimates the fast leakage so that the computed multiplication constant is less than that found experimentally. (auth)

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13 pages

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  • Other Information: Orig. Receipt Date: 31-DEC-59

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  • July 21, 1959

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  • Oct. 15, 2017, 10:09 p.m.

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  • Nov. 16, 2020, 11:28 a.m.

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Nestor, C. W. Jr. Multigroup Diffusion Theory Calculations for Recent Critical Experiments, report, July 21, 1959; Oak Ridge, Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1027191/: accessed October 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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