Environmental monitoring of $sup 41$Ar

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The Draft Standard for Restrictions on Radioactive Effluents from Research Reactors of June 1974 recommends that the allowable concentration in unrestricted areas be reduced by a factor of fifty to 8 x 10$sup -10$ $mu$Ci/cc. The objective of this investigation was to develop a simple and accurate procedure for measuring argon-41 in unrestricted areas when this radioactive noble gas exists in concentrations significantly below the new recommended allowable concentration. These measurements were made in order to provide an accurate and simple verification of the results obtained when using prediction models for the spatial variation of the concentration of gases released ... continued below

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Pages: 2

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Sasscer, D.S. & Andreu, C. January 1, 1975.

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Description

The Draft Standard for Restrictions on Radioactive Effluents from Research Reactors of June 1974 recommends that the allowable concentration in unrestricted areas be reduced by a factor of fifty to 8 x 10$sup -10$ $mu$Ci/cc. The objective of this investigation was to develop a simple and accurate procedure for measuring argon-41 in unrestricted areas when this radioactive noble gas exists in concentrations significantly below the new recommended allowable concentration. These measurements were made in order to provide an accurate and simple verification of the results obtained when using prediction models for the spatial variation of the concentration of gases released from a source. The ability to measure argon-41 at a concentration which is less than 2 percent of the previously allowable value required the development of a high- sensitivity radiation detection system. The system which was developed consisted of: connecting a four inch by four inch and a three inch by a three inch sodium iodide detector in parallel; measuring concentrated samples of air in scuba tank filled to 2,200 psi by means of a high pressure pump; and obtaining low radioactive background by locating the detectors and scuba air samples tank in a lead cave with six inch thick walls. (auth)

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Pages: 2

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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.: CONF-760202--14
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 4133724
  • Archival Resource Key: ark:/67531/metadc867627

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  • January 1, 1975

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  • Sept. 16, 2016, 12:32 a.m.

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Sasscer, D.S. & Andreu, C. Environmental monitoring of $sup 41$Ar, article, January 1, 1975; United States. (digital.library.unt.edu/ark:/67531/metadc867627/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.