Variance calculations for materials accounting system design and evaluation

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Description

Error propagation/variance calculations are used for establishing alarm limits for materials balance closures. Variance calculations may also be employed in the evaluation of accounting system designs for a proposed facility, as well as for upgrades of existing facilities. Information from such an exercise may be used to allocate resources for system improvements and identify process areas that require strict access or material controls. Simplifying assumptions are normally required since detailed data are not available for proposed facilities and may be difficult to obtain for existing facilities. Transfer, inventory, and measurement data are input into a code that calculates the variance ... continued below

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Pages: 6

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Thomas, K.E. January 1, 1987.

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Description

Error propagation/variance calculations are used for establishing alarm limits for materials balance closures. Variance calculations may also be employed in the evaluation of accounting system designs for a proposed facility, as well as for upgrades of existing facilities. Information from such an exercise may be used to allocate resources for system improvements and identify process areas that require strict access or material controls. Simplifying assumptions are normally required since detailed data are not available for proposed facilities and may be difficult to obtain for existing facilities. Transfer, inventory, and measurement data are input into a code that calculates the variance for each term in the materials balance equation. Provision should be made for treatment of measurement correlations and holdup. The results are analyzed to determine major contributors to the total materials balance area (MBA) variance. A sensitivity analysis may be performed to determine the effect of changes in the measurements, measurement errors, or MBA structure. Examples of how variance calculations are used in accounting system analysis are discussed in the paper.

Physical Description

Pages: 6

Notes

NTIS, PC A02; 3.

Source

  • 28. INMM annual meeting on safeguards: a mature technology, Newport Beach, CA, USA, 12 Jul 1987

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  • Other: DE87013131
  • Report No.: LA-UR-87-2222
  • Report No.: CONF-870713-59
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6106981
  • Archival Resource Key: ark:/67531/metadc1107363

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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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Creation Date

  • January 1, 1987

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • March 27, 2018, 12:24 p.m.

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Thomas, K.E. Variance calculations for materials accounting system design and evaluation, article, January 1, 1987; United States. (digital.library.unt.edu/ark:/67531/metadc1107363/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.