A preliminary design study for improving performance in tomographic assays

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Description

The authors recently introduced the tomographic-gamma-scanner (TGS) method for assaying transuranic (TRU) waste and special nuclear material (SNM) in 55-gal drums. The TGS combines low-resolution emission and transmission tomography to obtain attenuation-corrected images of the radionuclide distribution inside a drum. In a low-resolution tomographic assay device, it is desirable to have as flat an efficiency profile as possible. Using computer simulations, they have demonstrated that a flat response in the vertical direction can be obtained by using a diamond-shaped collimator, and that this flatness of response translates into improved assay accuracy. Similarly, they have shown that the use of a ... continued below

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18 p.

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Estep, R.J. March 1, 1994.

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Description

The authors recently introduced the tomographic-gamma-scanner (TGS) method for assaying transuranic (TRU) waste and special nuclear material (SNM) in 55-gal drums. The TGS combines low-resolution emission and transmission tomography to obtain attenuation-corrected images of the radionuclide distribution inside a drum. In a low-resolution tomographic assay device, it is desirable to have as flat an efficiency profile as possible. Using computer simulations, they have demonstrated that a flat response in the vertical direction can be obtained by using a diamond-shaped collimator, and that this flatness of response translates into improved assay accuracy. Similarly, they have shown that the use of a continuous-motion scan protocol reduces horizontal efficiency variations.

Physical Description

18 p.

Notes

INIS; OSTI as DE94008779

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  • Other Information: PBD: Mar 1994

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  • Other: DE94008779
  • Report No.: LA--12727-MS
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/142477 | External Link
  • Office of Scientific & Technical Information Report Number: 142477
  • Archival Resource Key: ark:/67531/metadc625452

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • March 1, 1994

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 26, 2016, 3:27 p.m.

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Estep, R.J. A preliminary design study for improving performance in tomographic assays, report, March 1, 1994; New Mexico. (digital.library.unt.edu/ark:/67531/metadc625452/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.