Volumetric radioassay of lead bricks being considered for unrestricted release

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Description

The hardware, software, and a protocol have been developed for the screening of lead bricks for free release or recycle from the Idaho National Engineering Laboratory. The procedure for measuring the background from a sampling of ``clean`` lead bricks and for deducing the decision limits (in pCi/g) have been developed. At the decision limit, a radioactive lead brick would be detected with 95% confidence if it were present. The total and peak efficiencies of a 2.54-cm diameter {times} 2.54-cm high NaI(Tl) scintillation detector for the counting geometry of the present study were measured with a mixed radionuclide standard and calculated ... continued below

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66 p.

Creation Information

Gehrke, R.J.; Losinski, S.J. & Seal, G.L. January 1, 1995.

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Description

The hardware, software, and a protocol have been developed for the screening of lead bricks for free release or recycle from the Idaho National Engineering Laboratory. The procedure for measuring the background from a sampling of ``clean`` lead bricks and for deducing the decision limits (in pCi/g) have been developed. At the decision limit, a radioactive lead brick would be detected with 95% confidence if it were present. The total and peak efficiencies of a 2.54-cm diameter {times} 2.54-cm high NaI(Tl) scintillation detector for the counting geometry of the present study were measured with a mixed radionuclide standard and calculated with a Monte Carlo program, CYLTRAN. The deduced decision limit for the counting conditions of the present study were 0.0588 pCi/g by analyzing the entire spectrum and 0.256 pCi/g by analyzing the 661-keV peak region for a 900-second count.

Physical Description

66 p.

Notes

INIS; OSTI as DE95008659

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  • Other Information: PBD: Jan 1995

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  • Other: DE95008659
  • Report No.: INEL--95/0001
  • Grant Number: AC07-94ID13223
  • DOI: 10.2172/33115 | External Link
  • Office of Scientific & Technical Information Report Number: 33115
  • Archival Resource Key: ark:/67531/metadc674227

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  • January 1, 1995

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Feb. 24, 2016, 6:58 p.m.

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Gehrke, R.J.; Losinski, S.J. & Seal, G.L. Volumetric radioassay of lead bricks being considered for unrestricted release, report, January 1, 1995; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc674227/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.