Non-destructive analysis of impure HEU-carbon samples using an Active Well Coincidence Counter (AWCC)

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Highly enriched uranium-containing graphite-based material from the Los Alamos National Laboratory (LANL) is currently stored at the Idaho National Engineering and Environmental Laboratory (INEEL). Measurements to verify the uranium content of these samples are required prior to their disposition to the Y-12 facility in Tennessee. The stored materials vary significantly in their matrix purity and in their {sup 235}U content and enrichment. A set of 26 samples selected from the LANL material inventory were analyzed non-destructively using an Active Well Coincidence Counter (AWCC) calibrated versus pure UO{sub 3} standards. A correction, calculated from published data and the approximate carbon-to-uranium atom ... continued below

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6 p.

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Hartwell, J.K. & McLaughlin, G.D. July 1, 1998.

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Description

Highly enriched uranium-containing graphite-based material from the Los Alamos National Laboratory (LANL) is currently stored at the Idaho National Engineering and Environmental Laboratory (INEEL). Measurements to verify the uranium content of these samples are required prior to their disposition to the Y-12 facility in Tennessee. The stored materials vary significantly in their matrix purity and in their {sup 235}U content and enrichment. A set of 26 samples selected from the LANL material inventory were analyzed non-destructively using an Active Well Coincidence Counter (AWCC) calibrated versus pure UO{sub 3} standards. A correction, calculated from published data and the approximate carbon-to-uranium atom ratios of each sample, was applied for the response enhancement from the carbon matrix. In some cases this correction was as high as 30%. Eight of the 26 sample that had been analyzed in the AWCC were destructively analyzed to provide a benchmark for the non-destructive analyses. The average recovery (NDA/Destructive results) was 0.997 {+-} 0.115. One sample had a destructive result that lay outside a 3-sigma interval about the NDA result.

Physical Description

6 p.

Notes

INIS; OSTI as DE98057480

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  • 39. Institute of Nuclear Materials Management (INMM) annual meeting, Naples, FL (United States), 26-30 Jul 1998

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  • Other: DE98057480
  • Report No.: INEEL/CON--98-00166
  • Report No.: CONF-980733--
  • Grant Number: AC07-94ID13223
  • DOI: 10.2172/665871 | External Link
  • Office of Scientific & Technical Information Report Number: 665871
  • Archival Resource Key: ark:/67531/metadc707759

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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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  • July 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • July 19, 2016, 12:28 p.m.

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Hartwell, J.K. & McLaughlin, G.D. Non-destructive analysis of impure HEU-carbon samples using an Active Well Coincidence Counter (AWCC), report, July 1, 1998; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc707759/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.