Integration and Evaluation of a Position Sensor with Continuous Read-Out for use with the Environmental Measurement-While-Drilling Gamma Ray Spectrometer System

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The Environmental Measurement-While-Drilling-Gamma Ray Spectrometer (EMWD-GRS) system represents an innovative blend of new and existing technology that provides real-time environmental and drill bit data during drilling operations. The EMWD-GRS technology was demonstrated at Savannah River Site (SRS) F-Area Retention Basin. The EMWD-GRS technology demonstration consisted of continuously monitoring for gamma-radiation-producing contamination while drilling two horizontal boreholes below the backfilled waste retention basin. These boreholes passed near previously sampled locations where concentrations of contaminant levels of cesium had been measured. Contaminant levels continuously recorded by the EMWD-GRS system during drilling were compared to contaminant levels previously determined through quantitative laboratory analysis ... continued below

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10 p.

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Lockwood, G.J.; Normann, R.A.; Selph, M.M. & Williams, C.V. February 22, 1999.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

The Environmental Measurement-While-Drilling-Gamma Ray Spectrometer (EMWD-GRS) system represents an innovative blend of new and existing technology that provides real-time environmental and drill bit data during drilling operations. The EMWD-GRS technology was demonstrated at Savannah River Site (SRS) F-Area Retention Basin. The EMWD-GRS technology demonstration consisted of continuously monitoring for gamma-radiation-producing contamination while drilling two horizontal boreholes below the backfilled waste retention basin. These boreholes passed near previously sampled locations where concentrations of contaminant levels of cesium had been measured. Contaminant levels continuously recorded by the EMWD-GRS system during drilling were compared to contaminant levels previously determined through quantitative laboratory analysis of soil samples. The demonstration of the EMWD-GRS was a complete success. The results show general agreement between the soil sampling and EMWD-GRS techniques for CS-137. It was recognized that the EMWD-GRS tool would better satisfy our customers' needs if the instrument location could be continuously monitored. During the demonstration at SRS, an electromagnetic beacon with a walkover monitor (Subsite{reg_sign}) was used to measure bit location at depth. To use a beacon locator drilling must be stopped, thus it is normally only used when a new section of pipe was added. The location of contamination could only be estimated based on the position of the EMED-GRS package and the distance between locator beacon readings. A continuous location system that would allow us to know the location of each spectrum as it is obtained is needed.

Physical Description

10 p.

Notes

INIS; OSTI as DE00003881

Medium: P; Size: 10 pages

Source

  • North American No Dig 98 Preliminary Program, ''Achieving New Heights in Trenchless Technology'', Albuquerque, NM (US), 04/05/1998--04/08/1998

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  • Report No.: SAND99-0462C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 3881
  • Archival Resource Key: ark:/67531/metadc683742

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 22, 1999

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • April 6, 2017, 6:56 p.m.

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Lockwood, G.J.; Normann, R.A.; Selph, M.M. & Williams, C.V. Integration and Evaluation of a Position Sensor with Continuous Read-Out for use with the Environmental Measurement-While-Drilling Gamma Ray Spectrometer System, article, February 22, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc683742/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.