Experimental study of variations in background radiation and the effect on Nuclear Car Wash sensitivity

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Error rates in a cargo screening system such as the Nuclear Car Wash [1-7] depend on the standard deviation of the background radiation count rate. Because the Nuclear Car Wash is an active interrogation technique, the radiation signal for fissile material must be detected above a background count rate consisting of cosmic, ambient, and neutron-activated radiations. It was suggested previously [1,6] that the Corresponding negative repercussions for the sensitivity of the system were shown. Therefore, to assure the most accurate estimation of the variation, experiments have been performed to quantify components of the actual variance in the background count rate, ... continued below

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PDF-file: 24 pages; size: 0.8 Mbytes

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Church, J; Slaughter, D; Norman, E; Asztalos, S & Biltoft, P February 7, 2007.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 22 times . More information about this report can be viewed below.

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Description

Error rates in a cargo screening system such as the Nuclear Car Wash [1-7] depend on the standard deviation of the background radiation count rate. Because the Nuclear Car Wash is an active interrogation technique, the radiation signal for fissile material must be detected above a background count rate consisting of cosmic, ambient, and neutron-activated radiations. It was suggested previously [1,6] that the Corresponding negative repercussions for the sensitivity of the system were shown. Therefore, to assure the most accurate estimation of the variation, experiments have been performed to quantify components of the actual variance in the background count rate, including variations in generator power, irradiation time, and container contents. The background variance is determined by these experiments to be a factor of 2 smaller than values assumed in previous analyses, resulting in substantially improved projections of system performance for the Nuclear Car Wash.

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PDF-file: 24 pages; size: 0.8 Mbytes

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  • Report No.: UCRL-TR-229157
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/902608 | External Link
  • Office of Scientific & Technical Information Report Number: 902608
  • Archival Resource Key: ark:/67531/metadc877370

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  • February 7, 2007

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 7, 2016, 11:30 a.m.

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Church, J; Slaughter, D; Norman, E; Asztalos, S & Biltoft, P. Experimental study of variations in background radiation and the effect on Nuclear Car Wash sensitivity, report, February 7, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc877370/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.