Modifications of alpha processing software to improve calculation of limits for qualitative detection

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Description

The work described in this report was done for the Bioassay Counting Laboratory (BCL) of the Center of Excellence for Bioassay of the Analytical Services Organization at the Oak Ridge Y-12 Plant. BCL takes urine and fecal samples and tests for alpha radiation. An automated system, supplied by Canberra Industries, counts the activities in the samples and processes the results. The Canberra system includes hardware and software. The managers of BCL want to improve the accuracy of the results they report to their final customers. The desired improvements are of particular interest to the managers of BCL because the levels ... continued below

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173 p.

Creation Information

Kirkpatrick, J.R. January 1, 1997.

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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. More information about this report can be viewed below.

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  • Oak Ridge National Laboratory
    Publisher Info: Oak Ridge National Lab., Computational Physics and Engineering Div., TN (United States)
    Place of Publication: Tennessee

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Description

The work described in this report was done for the Bioassay Counting Laboratory (BCL) of the Center of Excellence for Bioassay of the Analytical Services Organization at the Oak Ridge Y-12 Plant. BCL takes urine and fecal samples and tests for alpha radiation. An automated system, supplied by Canberra Industries, counts the activities in the samples and processes the results. The Canberra system includes hardware and software. The managers of BCL want to improve the accuracy of the results they report to their final customers. The desired improvements are of particular interest to the managers of BCL because the levels of alpha-emitting radionuclides in samples measured at BCL are usually so low that a significant fraction of the measured signal is due to background and to the reagent material used to extract the radioactive nuclides from the samples. Also, the background and reagent signals show a significant level of random variation. The customers at BCL requested four major modifications of the software. The requested software changes have been made and tested. The present report is in two parts. The first part describes what the modifications were supposed to accomplish. The second part describes the changes on a line-by-line basis. The second part includes listings of the changed software and discusses possible steps to correct a particular error condition. Last, the second part describes the effect of truncation errors on the standard deviations calculated from samples whose signals are very nearly the same.

Physical Description

173 p.

Notes

INIS; OSTI as DE98003785

Source

  • Other Information: PBD: Jan 1997

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  • Other: DE98003785
  • Report No.: Y/DK--1086
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/629417 | External Link
  • Office of Scientific & Technical Information Report Number: 629417
  • Archival Resource Key: ark:/67531/metadc696082

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • January 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 3, 2016, 6:48 p.m.

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Kirkpatrick, J.R. Modifications of alpha processing software to improve calculation of limits for qualitative detection, report, January 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc696082/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.