Finding and evaluating potential radiological problems in the vicinity of uranium milling sites

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Tailings at inactive milling sites usually have a low frequency of human occupancy but continuously generate /sup 222/Rn into the atmosphere. Measurements of airborne /sup 222/Rn and /sup 222/Rn flux are made on the sites to define the tailings source term. Concurrently with these measurements, an ambient /sup 222/Rn monitoring network is established off-site and a meteolrololgical station is established at or near the mill site. Radioactivity can migrate to areas outside of site boundaries by wind and water erosion, groundwater transport, spillage of incoming purposes. In order to identify and assess off-site radioactivity on properties in the vicinity of ... continued below

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Pages: 12

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Goldsmith, W.A. & Yates, W.G. January 1, 1982.

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Description

Tailings at inactive milling sites usually have a low frequency of human occupancy but continuously generate /sup 222/Rn into the atmosphere. Measurements of airborne /sup 222/Rn and /sup 222/Rn flux are made on the sites to define the tailings source term. Concurrently with these measurements, an ambient /sup 222/Rn monitoring network is established off-site and a meteolrololgical station is established at or near the mill site. Radioactivity can migrate to areas outside of site boundaries by wind and water erosion, groundwater transport, spillage of incoming purposes. In order to identify and assess off-site radioactivity on properties in the vicinity of milling sites, a combination of aerial and ground-level radiological monitoring techniques are used. The ground mobile gamma-ray scan is conducted using a vehicle equipped with sensitive gamma-ray detectors. The detectors are shielded so that gamma radiation input is viewed through only one side of the vehicle. This system is capable of precisely locating properties which have anomalously high gamma radiation levels caused by the presence of tailings. Subsequently, these properties are identified as candidate vicinity properties and are scheduled for radiological surveys subject to the property owner's consent. The comprehensive radiological surveys conducted at these vicinity properties determine the amount, type, and location of tailings materials. Structures on a vicinity property are carefully surveyed to determine the presence or absence of construction-related uses of tailings. If structural uses of tailings are found, air samples are analyzed for /sup 222/Rn progeny, short-term continuous /sup 222/Rn monitoring is instituted, and /sup 222/Rn flux rate from tailings are estimated. If warranted, long-term /sup 222/Rn and progeny measurements are made.

Physical Description

Pages: 12

Notes

NTIS, PC A02/MF A01.

Source

  • International symposium on management of waste from uranium mining and milling, Albuquerque, NM, USA, 10 May 1982

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  • Other: DE82015377
  • Report No.: CONF-820552-4
  • Report No.: IAEA-SM-262/67
  • Grant Number: W-7405-ENG-26
  • Office of Scientific & Technical Information Report Number: 5361446
  • Archival Resource Key: ark:/67531/metadc1071062

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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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  • January 1, 1982

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • March 23, 2018, 4:18 p.m.

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Goldsmith, W.A. & Yates, W.G. Finding and evaluating potential radiological problems in the vicinity of uranium milling sites, article, January 1, 1982; United States. (digital.library.unt.edu/ark:/67531/metadc1071062/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.