The influence of salt aerosol on alpha radiation detection by WIPP continuous air monitors

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Description

Alpha continuous air monitors (CAMs) will be used at the Waste Isolation Pilot Plant (WIPP) to measure airborne transuranic radioactivity that might be present in air exhaust or in work-place areas. WIPP CAMs are important to health and safety because they are used to alert workers to airborne radioactivity, to actuate air-effluent filtration systems, and to detect airborne radioactivity so that the radioactivity can be confined in a limited area. In 1993, the Environmental Evaluation Group (EEG) reported that CAM operational performance was affected by salt aerosol, and subsequently, the WIPP CAM design and usage were modified. In this report, ... continued below

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52 p.

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Bartlett, W.T. & Walker, B.A. January 1, 1996.

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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. It has been viewed 12 times . More information about this report can be viewed below.

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Description

Alpha continuous air monitors (CAMs) will be used at the Waste Isolation Pilot Plant (WIPP) to measure airborne transuranic radioactivity that might be present in air exhaust or in work-place areas. WIPP CAMs are important to health and safety because they are used to alert workers to airborne radioactivity, to actuate air-effluent filtration systems, and to detect airborne radioactivity so that the radioactivity can be confined in a limited area. In 1993, the Environmental Evaluation Group (EEG) reported that CAM operational performance was affected by salt aerosol, and subsequently, the WIPP CAM design and usage were modified. In this report, operational data and current theories on aerosol collection were reviewed to determine CAM quantitative performance limitations. Since 1993, the overall CAM performance appears to have improved, but anomalous alpha spectra are present when sampling-filter salt deposits are at normal to high levels. This report shows that sampling-filter salt deposits directly affect radon-thoron daughter alpha spectra and overall monitor efficiency. Previously it was assumed that aerosol was mechanically collected on the surface of CAM sampling filters, but this review suggests that electrostatic and other particle collection mechanisms are more important than previously thought. The mechanism of sampling-filter particle collection is critical to measurement of acute releases of radioactivity. 41 refs.

Physical Description

52 p.

Notes

INIS; OSTI as DE96004879

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  • Other Information: PBD: Jan 1996

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  • Other: DE96004879
  • Report No.: DOE/AL/58309--60
  • Report No.: EEG--60
  • Grant Number: AC04-89AL58309
  • DOI: 10.2172/179208 | External Link
  • Office of Scientific & Technical Information Report Number: 179208
  • Archival Resource Key: ark:/67531/metadc666592

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  • January 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Dec. 1, 2015, 2:45 p.m.

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Bartlett, W.T. & Walker, B.A. The influence of salt aerosol on alpha radiation detection by WIPP continuous air monitors, report, January 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc666592/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.