Dynamic and static error analyses of neutron radiography testing

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Neutron radiography systems are being used for real-time visualization of the dynamic behavior as well as time-averaged measurements of spatial vapor fraction distributions for two phase fluids. The data in the form of video images are typically recorded on videotape at 30 frames per second. Image analysis of he video pictures is used to extract time-dependent or time-averaged data. The determination of the average vapor fraction requires averaging of the logarithm of time-dependent intensity measurements of the neutron beam (gray scale distribution of the image) that passes through the fluid. This could be significantly different than averaging the intensity of ... continued below

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13 p.

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Joo, H. & Glickstein, S.S. March 1, 1999.

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  • Bettis Atomic Power Laboratory
    Publisher Info: Bettis Atomic Power Lab., West Mifflin, PA (United States)
    Place of Publication: West Mifflin, Pennsylvania

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Description

Neutron radiography systems are being used for real-time visualization of the dynamic behavior as well as time-averaged measurements of spatial vapor fraction distributions for two phase fluids. The data in the form of video images are typically recorded on videotape at 30 frames per second. Image analysis of he video pictures is used to extract time-dependent or time-averaged data. The determination of the average vapor fraction requires averaging of the logarithm of time-dependent intensity measurements of the neutron beam (gray scale distribution of the image) that passes through the fluid. This could be significantly different than averaging the intensity of the transmitted beam and then taking the logarithm of that term. This difference is termed the dynamic error (error in the time-averaged vapor fractions due to the inherent time-dependence of the measured data) and is separate from the static error (statistical sampling uncertainty). Detailed analyses of both sources of errors are discussed.

Physical Description

13 p.

Notes

INIS; OSTI as DE99002096

Source

  • 6. world conference on neutron radiography, Osaka (Japan), 17-21 May 1999

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  • Other: DE99002096
  • Report No.: WAPD-T--3231
  • Report No.: CONF-990502--
  • Grant Number: AC11-93PN38195
  • DOI: 10.2172/319778 | External Link
  • Office of Scientific & Technical Information Report Number: 334311
  • Archival Resource Key: ark:/67531/metadc685388

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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.

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  • March 1, 1999

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 16, 2016, 2:09 p.m.

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Joo, H. & Glickstein, S.S. Dynamic and static error analyses of neutron radiography testing, article, March 1, 1999; West Mifflin, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc685388/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.