Ambient environmental radiation monitoring at the Lawrence Livermore Laboratory

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Thermoluminescence dosimetry is the principal means of measuring ambient $gamma$ radiation at the Lawrence Livermore Laboratory. These dosimeters are used at 12 perimeter locations and 41 locations in the off-site vicinity of the Laboratory, and are exchanged quarterly. Control dosimeters are stored in a 75- mm-thick lead shield located out-of-doors to duplicate temperature cycling of field dosimeters. Effect of dosimeter response to radiation in the shield is determined each quarter. Calibration irradiations are made midway through the exposure cycle to compensate for signal fading. Terrestrial exposure rates calculated from the activities of naturally occurring uranium, thorium, and potassium in Livermore ... continued below

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Pages: 7

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Lindeken, C.L.; White, J.H.; Toy, A.J. & Sundbeck, C.W. November 21, 1975.

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Description

Thermoluminescence dosimetry is the principal means of measuring ambient $gamma$ radiation at the Lawrence Livermore Laboratory. These dosimeters are used at 12 perimeter locations and 41 locations in the off-site vicinity of the Laboratory, and are exchanged quarterly. Control dosimeters are stored in a 75- mm-thick lead shield located out-of-doors to duplicate temperature cycling of field dosimeters. Effect of dosimeter response to radiation in the shield is determined each quarter. Calibration irradiations are made midway through the exposure cycle to compensate for signal fading. Terrestrial exposure rates calculated from the activities of naturally occurring uranium, thorium, and potassium in Livermore Valley soils vary from 3 to 7 $mu$R/hr. Local inferred exposure rates from cosmic radiation are approximately 4 $mu$R/hr. TLD measurements are in good agreement with these data. Off-site and site perimeter data are compared, and differences related to Laboratory operations are discussed. (auth)

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Pages: 7

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Dep. NTIS

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  • 9. topical symposium on operational health physics, Denver, Colorado, USA, 9 Feb 1976

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  • Report No.: UCRL--77106
  • Report No.: CONF-760202--2
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 4133702
  • Archival Resource Key: ark:/67531/metadc865156

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  • November 21, 1975

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 18, 2016, 1:08 p.m.

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Lindeken, C.L.; White, J.H.; Toy, A.J. & Sundbeck, C.W. Ambient environmental radiation monitoring at the Lawrence Livermore Laboratory, article, November 21, 1975; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc865156/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.