The use of TI-208 gamma rays for safeguards, nondestructive-assay (NDA) measurements

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Description

This paper examines two cases where gamma rays from Tl-208, including the 2614keV gamma ray, were used to detect anomalies in waste material. In addition to the characterization of waste for waste acceptance, and compliance with environmental and transportation laws, there is a safeguards element as well. The more sophisticated method of NDA at Y-12 includes a means to detect shielded special nuclear material (SNM). Excess count rates in the 2614keV gamma ray from Tl-208 are an indication of potential shielded HEU in waste as well as other containers. The 2614keV gamma ray is easy to monitor routinely. When a ... continued below

Creation Information

Oberer, R. B.; Chiang, L. G.; Norris, M. J.; Gunn, C. A. & Adaline, B. C. May 26, 2009.

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  • Oak Ridge Y-12 Plant
    Publisher Info: Oak Ridge Y-12 Plant (Y-12), Oak Ridge, TN (United States)
    Place of Publication: Oak Ridge, Tennessee

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Description

This paper examines two cases where gamma rays from Tl-208, including the 2614keV gamma ray, were used to detect anomalies in waste material. In addition to the characterization of waste for waste acceptance, and compliance with environmental and transportation laws, there is a safeguards element as well. The more sophisticated method of NDA at Y-12 includes a means to detect shielded special nuclear material (SNM). Excess count rates in the 2614keV gamma ray from Tl-208 are an indication of potential shielded HEU in waste as well as other containers. The 2614keV gamma ray is easy to monitor routinely. When a large 2614keV peak is detected, further investigation can be conducted from the gamma spectrum. This paper describes this further investigation in two cases. In one case self-shielded HEU was detected. In the other case the Tl-208 gamma rays came from a piece of Th-232 metal.

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  • Report No.: Y/EN-8270
  • Grant Number: DE-AC05-00OR22800
  • DOI: 10.2172/1009245 | External Link
  • Office of Scientific & Technical Information Report Number: 1009245
  • Archival Resource Key: ark:/67531/metadc831072

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  • May 26, 2009

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • Feb. 16, 2017, 7:47 p.m.

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Oberer, R. B.; Chiang, L. G.; Norris, M. J.; Gunn, C. A. & Adaline, B. C. The use of TI-208 gamma rays for safeguards, nondestructive-assay (NDA) measurements, report, May 26, 2009; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc831072/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.