Intermediate depth burial of classified transuranic wastes in arid alluvium

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Intermediate depth disposal operations were conducted by the US Department of Energy (DOE) at the DOE`s Nevada Test Site (NTS) from 1984 through 1989. These operations emplaced high-specific activity low-level wastes (LLW) and limited quantities of classified transuranic (TRU) wastes in 37 m (120-ft) deep, Greater Confinement Disposal (GCD) boreholes. The GCD boreholes are 3 m (10 ft) in diameter and founded in a thick sequence of arid alluvium. The bottom 15 m (50 ft) of each borehole was used for waste emplacement and the upper 21 m (70 ft) was backfilled with native alluvium. The bottom of each GCD ... continued below

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11 p.

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Cochran, J.R.; Crowe, B.M. & Di Sanza, F. April 1, 1999.

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  • Cochran, J.R. Sandia National Labs., Albuquerque, NM (United States). Environmental Risk and Decision Analysis Dept.
  • Crowe, B.M. Los Alamos National Lab., NM (United States). Geologic Integration Group
  • Di Sanza, F. Dept. of Energy, Las Vegas, NV (United States). Nevada Operations Office

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Intermediate depth disposal operations were conducted by the US Department of Energy (DOE) at the DOE`s Nevada Test Site (NTS) from 1984 through 1989. These operations emplaced high-specific activity low-level wastes (LLW) and limited quantities of classified transuranic (TRU) wastes in 37 m (120-ft) deep, Greater Confinement Disposal (GCD) boreholes. The GCD boreholes are 3 m (10 ft) in diameter and founded in a thick sequence of arid alluvium. The bottom 15 m (50 ft) of each borehole was used for waste emplacement and the upper 21 m (70 ft) was backfilled with native alluvium. The bottom of each GCD borehole is almost 200 m (650 ft) above the water table. The GCD boreholes are located in one of the most arid portions of the US, with an average precipitation of 13 cm (5 inches) per year. The limited precipitation, coupled with generally warm temperatures and low humidities results in a hydrologic system dominated by evapotranspiration. The US Environmental Protection Agency`s (EPA`s) 40 CFR 191 defines the requirements for protection of human health from disposed TRU wastes. This EPA standard sets a number of requirements, including probabilistic limits on the cumulative releases of radionuclides to the accessible environment for 10,000 years. The DOE Nevada Operations Office (DOE/NV) has contracted with Sandia National Laboratories (Sandia) to conduct a performance assessment (PA) to determine if the TRU wastes emplaced in the GCD boreholes complies with the EPA`s 40 CFR 191 requirements. This paper describes DOE`s actions undertaken to evaluate whether the TRU wastes in the GCD boreholes will, or will not, endanger human health. Based on preliminary modeling, the TRU wastes in the GCD boreholes meet the EPA`s requirements, and are, therefore, protective of human health.

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11 p.

Notes

INIS; OSTI as DE99002192

Source

  • Waste management `99 symposium, Tucson, AZ (United States), 28 Feb - 4 Mar 1999

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  • Other: DE99002192
  • Report No.: LA-UR--99-639
  • Report No.: CONF-990201--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 334229
  • Archival Resource Key: ark:/67531/metadc684700

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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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Creation Date

  • April 1, 1999

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

Description Last Updated

  • May 20, 2016, 3:19 p.m.

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Cochran, J.R.; Crowe, B.M. & Di Sanza, F. Intermediate depth burial of classified transuranic wastes in arid alluvium, article, April 1, 1999; New Mexico. (digital.library.unt.edu/ark:/67531/metadc684700/: accessed January 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.