Water-Reflected 233U Uranyl Nitrate Solutions in Simple Geometry

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A number of critical experiments involving {sup 233}U were performed in the Oak Ridge National Laboratory Building 9213 Critical Experiments Facility during the years 1952 and 1953. These experiments, reported in Reference 1, were directed toward determining bounding values for the minimum critical mass, minimum critical volume, and maximum safe pipe size of water-moderated solutions of {sup 233}U. Additional information on the critical experiments was found in the experimental logbooks. Two experiments utilizing uranyl nitrate (UO{sub 2}(NO{sub 3}){sub 2}) solutions in simple geometry are evaluated in this report. Experiment 37 is in a 10.4-inch diameter sphere, and Experiment 39 is ... continued below

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38 pages

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Elam, K.R. August 15, 2001.

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A number of critical experiments involving {sup 233}U were performed in the Oak Ridge National Laboratory Building 9213 Critical Experiments Facility during the years 1952 and 1953. These experiments, reported in Reference 1, were directed toward determining bounding values for the minimum critical mass, minimum critical volume, and maximum safe pipe size of water-moderated solutions of {sup 233}U. Additional information on the critical experiments was found in the experimental logbooks. Two experiments utilizing uranyl nitrate (UO{sub 2}(NO{sub 3}){sub 2}) solutions in simple geometry are evaluated in this report. Experiment 37 is in a 10.4-inch diameter sphere, and Experiment 39 is in a 10-inch diameter cylinder. The {sup 233}U concentration ranges from 49 to 62 g {sup 233}U/l. Both experiments were reflected by at least 6 inches of water in all directions. Paraffin-reflected uranyl nitrate experiments, also reported in Reference 1, are evaluated elsewhere. Experiments with smaller paraffin reflected 5-, 6-, and 7.5-inch diameter cylinders are evaluated in U233-SOL-THERM-004. Experiments with paraffin reflected 8-, 8.5-, 9-, 10-, and 12-inch diameter cylinders are evaluated in U233-SOL-THERM-002. Later experiments with highly-enriched {sup 235}U uranyl fluoride solution in the same 10.4-inch diameter sphere are reported in HEU-SOL-THERM-010. Both experiments were judged acceptable for use as criticality-safety benchmark experiments.

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38 pages

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  • Other Information: PBD: 15 Aug 2001

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  • Report No.: R01-111416
  • Grant Number: AC05-00OR22725
  • DOI: 10.2172/788636 | External Link
  • Office of Scientific & Technical Information Report Number: 788636
  • Archival Resource Key: ark:/67531/metadc717441

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 15, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 29, 2016, 3:29 p.m.

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Elam, K.R. Water-Reflected 233U Uranyl Nitrate Solutions in Simple Geometry, report, August 15, 2001; Tennessee. (digital.library.unt.edu/ark:/67531/metadc717441/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.