An evaluation of simple iron-water radiation shields and radiation measurements within concrete-lined and -capped pits

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Program 3 of Operation BREN consisted in a study of the performance of biological shields composed of various arrangements of steel, water, and borated polyethylene in spherical, cubical, and parallelepipedal geometries. Studies were also made of the radiation levels within concrete-lined and -capped pits, 4 ft in dia and 8 ft deep. The principal radiation source was the ORNL Health Physics Research Reactor, an unshielded, unreflected, 90 wt % U-10 wt % Mo, cylindrical bare-metal assembly. It was supported at heights ranging from 27 to 1500 ft by a hoist car riding outside of a 1527-ft-high steel tower. A 1200-curie ... continued below

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Pages: 99

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Muckenthaler, F.J.; Jung, L.; Blosser, T.V.; Freestone, R.M. Jr. & Miller, J.M. July 31, 1964.

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Program 3 of Operation BREN consisted in a study of the performance of biological shields composed of various arrangements of steel, water, and borated polyethylene in spherical, cubical, and parallelepipedal geometries. Studies were also made of the radiation levels within concrete-lined and -capped pits, 4 ft in dia and 8 ft deep. The principal radiation source was the ORNL Health Physics Research Reactor, an unshielded, unreflected, 90 wt % U-10 wt % Mo, cylindrical bare-metal assembly. It was supported at heights ranging from 27 to 1500 ft by a hoist car riding outside of a 1527-ft-high steel tower. A 1200-curie Co/sup 60/ gamma-ray source, similarly supported, was substituted for the reactor for some measurements. The work reported includes measurements of fast-neutron and gamma-ray dose rates and thermal-neutron fluxes in air and within the various shields, using the reactor source, measurements of gamma-ray dose rates in air from the Co/sup 60/ gamma-ray source, and measurements of gamma-ray pulse-height spectra within the pits, also employing the Co/sup 60/ source. 8 refs., 33 figs., 29 tabs.

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Pages: 99

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NTIS, PC A05/MF A01; 1.

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  • Other Information: Portions of this document are illegible in microfiche products. Declassified 27 Mar 1984

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  • Other: DE87014670
  • Report No.: CEX-62.30
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/6215223 | External Link
  • Office of Scientific & Technical Information Report Number: 6215223
  • Archival Resource Key: ark:/67531/metadc1114338

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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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  • July 31, 1964

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  • Feb. 22, 2018, 7:45 p.m.

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  • May 11, 2018, 2:32 p.m.

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Muckenthaler, F.J.; Jung, L.; Blosser, T.V.; Freestone, R.M. Jr. & Miller, J.M. An evaluation of simple iron-water radiation shields and radiation measurements within concrete-lined and -capped pits, report, July 31, 1964; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1114338/: accessed February 18, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.