Neutron dieaway methods for criticality safety measurements of fissile waste

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The differential dieaway technique (DDT), which uses a pulsed neutron source to interrogate containers of fissile materials with thermal neutrons, is reviewed. This method is widely used for certifying transuranic nuclear wastes for eventual emplacement at the Waste Isolation Pilot Plant. For purposes of criticality safety, an upper limit of 200 g of fissile material is permitted in a 55-gal waste drum. Problems involving waste-matrix effects and self-shielding may severely limit the accuracy of the DDT measurement. A dieaway method that uses both thermal and epithermal neutron interrogation, which has the potential for reducing these problems, is being developed. Recent ... continued below

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Pages: (10 p)

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Coop, K.L. January 1, 1989.

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Description

The differential dieaway technique (DDT), which uses a pulsed neutron source to interrogate containers of fissile materials with thermal neutrons, is reviewed. This method is widely used for certifying transuranic nuclear wastes for eventual emplacement at the Waste Isolation Pilot Plant. For purposes of criticality safety, an upper limit of 200 g of fissile material is permitted in a 55-gal waste drum. Problems involving waste-matrix effects and self-shielding may severely limit the accuracy of the DDT measurement. A dieaway method that uses both thermal and epithermal neutron interrogation, which has the potential for reducing these problems, is being developed. Recent experimental and calculational results for this development are described. 14 refs., 7 figs., 1 tab.

Physical Description

Pages: (10 p)

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NTIS, PC A02/MF A01 - OSTI; GPO Dep.

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  • Winter meeting of the American Nuclear Society, San Francisco, CA (USA), 26-30 Nov 1989

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  • Other: DE89014225
  • Report No.: LA-UR-89-2124
  • Report No.: CONF-891103--7
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5584551
  • Archival Resource Key: ark:/67531/metadc1092308

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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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  • January 1, 1989

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  • Feb. 10, 2018, 10:06 p.m.

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  • May 23, 2018, 5:30 p.m.

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Coop, K.L. Neutron dieaway methods for criticality safety measurements of fissile waste, article, January 1, 1989; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1092308/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.