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<p>Within the Plutonium Facility at LANL, samples of impure plutonium metal, salts and crucibles from pyrochemical processes are quantified for Nuclear Material Control and Accountability (NMCA). Results from a Thermal Neutron Counter (TNC) instrument collocated in-line with plutonium gloveboxes are compared with qualified non-destructive analysis (NDA) techniques. Different sample types require different approaches to provide good statistics. Impure metal samples and some salts with (α,n) reactions are measured via neutron multiplicity, while coincidence methods are used for other salts and crucible products. All items fell within NMCA accuracy and precision requirements, proving feasibility of in-line TNC measurements.</p>

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Characterization of salts, crucibles, and metals with gamma and neutron methods

  • 期刊论文

  • 发表日期：

    2025年10月31日

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  • C. Egozi,
  • T. R. Wenz,
  • A. C. Akin,
  • S. E. Betts,
  • L. Tandon

摘要

Within the Plutonium Facility at LANL, samples of impure plutonium metal, salts and crucibles from pyrochemical processes are quantified for Nuclear Material Control and Accountability (NMCA). Results from a Thermal Neutron Counter (TNC) instrument collocated in-line with plutonium gloveboxes are compared with qualified non-destructive analysis (NDA) techniques. Different sample types require different approaches to provide good statistics. Impure metal samples and some salts with (α,n) reactions are measured via neutron multiplicity, while coincidence methods are used for other salts and crucible products. All items fell within NMCA accuracy and precision requirements, proving feasibility of in-line TNC measurements.