Impact of the number of material measurement categories on measurement error

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Description

There is nearly always some mismatch between the physical properties of items containing nuclear material and standards used to calibrate the assay method. Physical properties include the density and heterogeneity of the item's nonnuclear material and the type of interfering species, such as hydrogen in the case of neutron counting. Some assay techniques are less sensitive to variation in physical properties than others and can be used to generate working standards. Provided that a reference assay method 1 (often calorimetry) is available that is well characterized (having negligible or known dependence on varying physical properties), we can assess the total ... continued below

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7 p.

Creation Information

Burr, Tom; Hemphill, G. M. (Geralyn M.); Longmire, V. L. (Victoria L.) & Smith, M. K. (Morag K.) January 1, 2002.

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Description

There is nearly always some mismatch between the physical properties of items containing nuclear material and standards used to calibrate the assay method. Physical properties include the density and heterogeneity of the item's nonnuclear material and the type of interfering species, such as hydrogen in the case of neutron counting. Some assay techniques are less sensitive to variation in physical properties than others and can be used to generate working standards. Provided that a reference assay method 1 (often calorimetry) is available that is well characterized (having negligible or known dependence on varying physical properties), we can assess the total measurement error of another method 2. In this paper we consider the impact of the number of measurement categories on the measurement error standard deviation of method 2. We assume that working standards (traceable to primary reference standards) are provided by the method 1 assay of actual facility items. Given the same number of working standards, we evaluate the tradeoff between using more working standards for each of a fewer number of categories versus using fewer standards in each of more categories. This leads to a method to determine a good allocation of working standards.

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7 p.

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  • Submitted to: 43rd Annual Institute of Nuclear Materials Management Meeting, Orlando, FL, June 23-27, 2002

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  • Report No.: LA-UR-02-3206
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976189
  • Archival Resource Key: ark:/67531/metadc933920

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • January 1, 2002

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 9, 2016, 11:40 p.m.

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Burr, Tom; Hemphill, G. M. (Geralyn M.); Longmire, V. L. (Victoria L.) & Smith, M. K. (Morag K.). Impact of the number of material measurement categories on measurement error, article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc933920/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.