Multigroup Diffusion Theory Calculations for Recent Critical Experiments

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In connection with the program of the measurement of eta for U233, several critical experiments have been performed by R. Gwin and D. W. Magnuson of ORML with light water solutions of uranyl nitrate (highly enriched in either U233 or U35) in an essentially bare sphere 27 inches in diameter. This report presents the results of two multigroup-diffusion-theory calculations for the above experiments performed by C. B. Mills and associated at Los Alamos. Assumer 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 … continued below

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13 pages : illustrations

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

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  • Main Title: Multigroup Diffusion Theory Calculations for Recent Critical Experiments
  • Series Title: Oak Ridge National Laboratory Reports
  • Added Title: Oak Ridge National Laboratory Report CF-59-7-66

Description

In connection with the program of the measurement of eta for U233, several critical experiments have been performed by R. Gwin and D. W. Magnuson of ORML with light water solutions of uranyl nitrate (highly enriched in either U233 or U35) in an essentially bare sphere 27 inches in diameter. This report presents the results of two multigroup-diffusion-theory calculations for the above experiments performed by C. B. Mills and associated at Los Alamos. Assumer 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.

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13 pages : illustrations

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  • Report No.: CF-59-7-66
  • Accession or Local Control No: metadc1241057
  • SuDoc Number: Y 3.At 7:22/CF-59-7-66
  • Archival Resource Key: ark:/67531/metadc1241057

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  • July 21, 1959

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  • July 9, 2023, 5:45 p.m.

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  • Nov. 14, 2023, 2:26 p.m.

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Nestor, C. W., Jr. Multigroup Diffusion Theory Calculations for Recent Critical Experiments, report, July 21, 1959; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1241057/: accessed October 16, 2026), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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