The application of neutron multiplicity counting to the assay of bulk plutonium bearing materials at RFETS and LLNL

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In the past several years, several facilities have identified a need for a large multiplicity counter to support safeguards of excess weapons materials and the measurement control and accountability of large, unusual samples. The authors have designed and fabricated two large thermal neutron multiplicity counters to meet this need at two DOE facilities. The first of these counters was built for Rocky Flats Environmental Test Site for use in the initial inventory inspection of excess weapons plutonium offered to International Atomic Energy Agency safeguards. The second counter was built for the Lawrence Livermore National Laboratory (LLNL) to support their material ... continued below

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8 p.

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Langner, D.G.; Krick, M.S. & Kroncke, K.E. October 1, 1995.

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Description

In the past several years, several facilities have identified a need for a large multiplicity counter to support safeguards of excess weapons materials and the measurement control and accountability of large, unusual samples. The authors have designed and fabricated two large thermal neutron multiplicity counters to meet this need at two DOE facilities. The first of these counters was built for Rocky Flats Environmental Test Site for use in the initial inventory inspection of excess weapons plutonium offered to International Atomic Energy Agency safeguards. The second counter was built for the Lawrence Livermore National Laboratory (LLNL) to support their material control and accountability program. For the LLNL version of the counter, a removable, fast-neutron interrogation assembly was added for the measurement of large uranium samples. In the passive mode these counters can accommodate samples in containers as large as a 30-gal. drum. This paper reports on the measured performance of these two counters and the data obtained with them.

Physical Description

8 p.

Notes

INIS; OSTI as DE96001375

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  • 5. international conference on facility-safeguards interface, Jackson Hole, WY (United States), 24-30 Sep 1995

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  • Other: DE96001375
  • Report No.: LA-UR--95-3320
  • Report No.: CONF-950923--12
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 120007
  • Archival Resource Key: ark:/67531/metadc626160

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Office of Scientific & Technical Information Technical Reports

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  • October 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 25, 2016, 1:22 p.m.

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Langner, D.G.; Krick, M.S. & Kroncke, K.E. The application of neutron multiplicity counting to the assay of bulk plutonium bearing materials at RFETS and LLNL, article, October 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc626160/: accessed July 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.