Passive neutron assay of heterogeneous waste drums using the segmented Add-a-Source method

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We have developed passive neutron detectors that include the Add-a-Source (AS) technique to improve the accuracy of the nondestructive assay of plutonium in large waste containers. We have improved the AS by incorporating multiple positions for the {sup 252}Cf source on the exterior of a 200-L drum. The multiple positions give a better coverage of the drum and have the effect of segmenting the matrix as a function of fill height. We have applied the multiposition AS to the assay of drums with heterogeneous matrix combinations of concrete, polyethylene, wood, paper, and metal. The measurement errors caused by the matrix ... continued below

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10 p.

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Menlove, H.O. July 1, 1995.

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Description

We have developed passive neutron detectors that include the Add-a-Source (AS) technique to improve the accuracy of the nondestructive assay of plutonium in large waste containers. We have improved the AS by incorporating multiple positions for the {sup 252}Cf source on the exterior of a 200-L drum. The multiple positions give a better coverage of the drum and have the effect of segmenting the matrix as a function of fill height. We have applied the multiposition AS to the assay of drums with heterogeneous matrix combinations of concrete, polyethylene, wood, paper, and metal. The measurement errors caused by the matrix significantly reduced by the AS technique and anomalous shielding material in the drum can be flagged for more detailed investigation.

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10 p.

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INIS; OSTI as DE95015192

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  • 36. annual meeting of the Institute for Nuclear Materials Management, Palm Desert, CA (United States), 9-12 Jul 1995

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  • Other: DE95015192
  • Report No.: LA-UR--95-1989
  • Report No.: CONF-950787--72
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 100038
  • Archival Resource Key: ark:/67531/metadc623167

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Office of Scientific & Technical Information Technical Reports

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  • July 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 25, 2016, 10:22 p.m.

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Menlove, H.O. Passive neutron assay of heterogeneous waste drums using the segmented Add-a-Source method, article, July 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc623167/: accessed December 12, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.