Calculation of airborne radioactivity hazard from machining volume-activated materials

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Description

When evaluating a task involving the machining of volume-activated materials, accelerator health physicists must consider more than the surface contamination levels of the equipment and containment of loose shavings, dust or filings. Machining operations such as sawing, routing, welding, and grinding conducted on volume-activated material may pose a significant airborne radioactivity hazard to the worker. This paper presents a computer spreadsheet notebook that conservatively estimates the airborne radioactivity levels generated during machining operations performed on volume-activated materials. By knowing (1) the size and type of materials, (2) the dose rate at a given distances, and (3) limited process knowledge, the ... continued below

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14 p.

Creation Information

Marshall, E. T. & Schwahn, S. O. October 1, 1996.

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This article 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 19 times . More information about this article can be viewed below.

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  • Marshall, E. T. Fermi National Accelerator Lab., Batavia, IL (United States)
  • Schwahn, S. O. Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

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Description

When evaluating a task involving the machining of volume-activated materials, accelerator health physicists must consider more than the surface contamination levels of the equipment and containment of loose shavings, dust or filings. Machining operations such as sawing, routing, welding, and grinding conducted on volume-activated material may pose a significant airborne radioactivity hazard to the worker. This paper presents a computer spreadsheet notebook that conservatively estimates the airborne radioactivity levels generated during machining operations performed on volume-activated materials. By knowing (1) the size and type of materials, (2) the dose rate at a given distances, and (3) limited process knowledge, the Derived Air Concentration (DAC) fraction can be estimated. This tool is flexible, taking into consideration that the process knowledge available for the different materials varies. It addresses the two most common geometries: thick plane and circular cylinder. Once the DAC fraction has been estimated, controls can be implemented to mitigate the hazard to the worker.

Physical Description

14 p.

Notes

INIS; OSTI as DE97050002

Source

  • 30. midyear topical meeting of the Health Physics Society, San Jose, CA (United States), 5-8 Jan 1997

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  • Other: DE97050002
  • Report No.: FNAL/C--96/339
  • Report No.: CONF-970134--5
  • Grant Number: AC02-76CH03000;AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 410409
  • Archival Resource Key: ark:/67531/metadc688996

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • June 3, 2016, 2:40 p.m.

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Marshall, E. T. & Schwahn, S. O. Calculation of airborne radioactivity hazard from machining volume-activated materials, article, October 1, 1996; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc688996/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.