Oralloy Hydride Critical Assemblies

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Description

Part I of this report covers critical-mass determinations for pseudospheres of oralloy hydride composition (approximating UH3) in 8"-thick Tu and Ni tampers and in the Tu tamper with Ni liner. The critical mass of a hydride cube in the thick Tu also is given. Data on weight and dimensional changes of hydride pieces during the period of use are included. In Part II are presented the results of Rossi time-scale measurements on the hydride assemblies. Values of alpha at delayed critical and its variation with mass in the neighborhood of delayed critical are given. Measurements on the activation of various … continued below

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62 pages : illustrations

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Paxton, Hugh Campbell; Orndoff, John D. & Linenberger, G. A. (Gustave Aaron) May 22, 1950.

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  • Main Title: Oralloy Hydride Critical Assemblies
  • Added Title: LA (Series) (Los Alamos, N.M.)
  • Series Title: Los Alamos National Laboratory Reports
  • Added Title: Los Alamos National Laboratory Report LA-1159 (Del.)

Description

Part I of this report covers critical-mass determinations for pseudospheres of oralloy hydride composition (approximating UH3) in 8"-thick Tu and Ni tampers and in the Tu tamper with Ni liner. The critical mass of a hydride cube in the thick Tu also is given. Data on weight and dimensional changes of hydride pieces during the period of use are included. In Part II are presented the results of Rossi time-scale measurements on the hydride assemblies. Values of alpha at delayed critical and its variation with mass in the neighborhood of delayed critical are given. Measurements on the activation of various detectors within the hydride assemblies are described in Part III. Results as a function of radial position are given for Au, for Au shielded by Au and by Cd, for S and for fission catchers with U235 and U238. Reactivity changes resulting from the introduction of foreign materials into the hydride assemblies are discussed in Part IV. Apparent regularities with respect to Z and qualitative interpretations of variations with radius are pointed out. From data for various radial positions, changes in critical mass corresponding to small changes in composition and density are computed.

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62 pages : illustrations

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Digitized from microopaque cards (2).

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  • SuDoc Number: Y 3.At 7:22/LA-1159 (Del.)
  • Report No.: LA-1159 (Del.)
  • Accession or Local Control No: metadc1257656
  • Archival Resource Key: ark:/67531/metadc1257656

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  • May 22, 1950

Added to The UNT Digital Library

  • April 12, 2021, 2:50 p.m.

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  • Nov. 2, 2022, 10:43 a.m.

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Paxton, Hugh Campbell; Orndoff, John D. & Linenberger, G. A. (Gustave Aaron). Oralloy Hydride Critical Assemblies, report, May 22, 1950; Los Alamos, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1257656/: accessed May 3, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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