Evaluation of several natural gamma radiation systems : a preliminary study

Details

• Personal Author:
  Maksimovic, S. D. ; Mowrey, Gary L.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  "An important element of the U.S. Bureau of Mines (USBM) mining research program is the development and evaluation of reliable coal interface detection (CID) systems. Commercially available CID sensors based on natural gamma radiation (NGR) are only applicable if the immediate roof is composed of shaley material. The USBM has made numerous underground and laboratory measurements using several NGR systems approved for installation on mining machines by the Mine Safety and Health Administration. In addition, two small handheld NGR instruments were used to make comparative measurements. Underground NGR measurements in 10 different coal seams, potassium-uranium-thorium radiometric analyses on samples from 16 seams, and chemical analyses of coal and rock for correlation with NGR counts were made. Laboratory test results on the effect of airgap and sample thickness, size, and weight on the NGR measurements, as well as general results of the various NGR systems, are discussed." - NIOSHTIC-2
  
  NIOSHTIC no. 20023489
  
  
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Information Circular
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  United States
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  iii, 48 numbered pages
• NIOSHTIC Number:
  nn:20023489
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d17707fc6a92bb345d196ade96af0e615412d1f37bf0e525d9f37d19d9d011ab1f653509df3e71ab7c679334b78ca44710d66054e7f98fdc2bf32e89e694377c
• Download URL:
  https://stacks.cdc.gov/view/cdc/8954/cdc_8954_DS1.pdf
• File Type:
  [PDF - 2.41 MB ]