Risk-based screening analysis of ground water contaminated by radionuclides introduced at the Nevada Test Site (NTS)

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The Nevada Test Site (NTS) is located in the southwestern part of Nevada, about 105 km (65 mi) northwest of the city of Las Vegas. Underground tests of nuclear weapons devices have been conducted at the NTS since late 1962 and ground water beneath the NTS has been contaminated with radionuclides produced by these tests. This concern prompted this examination of the potential health risk to these individuals from drinking the contaminated ground water either at a location on the NTS (assuming loss of institutional control after 100 y) or at one offsite (considering groundwater migration). For the purpose of ... continued below

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29 p.

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Daniels, J.I.; Anspaugh, L.R.; Andricevic, R. & Jacobson, R.L. June 1, 1993.

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Description

The Nevada Test Site (NTS) is located in the southwestern part of Nevada, about 105 km (65 mi) northwest of the city of Las Vegas. Underground tests of nuclear weapons devices have been conducted at the NTS since late 1962 and ground water beneath the NTS has been contaminated with radionuclides produced by these tests. This concern prompted this examination of the potential health risk to these individuals from drinking the contaminated ground water either at a location on the NTS (assuming loss of institutional control after 100 y) or at one offsite (considering groundwater migration). For the purpose of this assessment, a representative mix of the radionuclides of importance and their concentrations in ground water beneath the NTS were identified from measurements of radionuclide concentrations in groundwater samples-of-opportunity collected at the NTS. Transport of radionuclide-contaminated ground water offsite was evaluated using a travel-time-transport approach. At both locations of interest, potential human-health risk was calculated for an individual ingesting radionuclide-contaminated ground water over the course of a 70-y lifetime. Uncertainties about human physiological attributes, as well as about estimates of physical detriment per unit of radioactive material, were quantified and incorporated into the estimates of risk. The maximum potential excess lifetime risk of cancer mortality estimated for an individual at the offsite location ranges from 7 {times} 10{sup {minus}7} to 1 {times} 10{sup {minus}5}, and at the onsite location ranges from 3 {times} 10{sup {minus}3} to 2 {times} 10{sup {minus}2}. Both the offsite and the onsite estimates of risk are dominated by the lifetime doses from tritium. For the assessment of radionuclides in ground water, the critical uncertainty is their concentration today under the entire NTS.

Physical Description

29 p.

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INIS; OSTI as DE93016954

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  • Other Information: PBD: Jun 1993

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  • Other: DE93016954
  • Report No.: UCRL-ID--112789
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/138660 | External Link
  • Office of Scientific & Technical Information Report Number: 138660
  • Archival Resource Key: ark:/67531/metadc622914

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  • June 1, 1993

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 17, 2016, 4:01 p.m.

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Daniels, J.I.; Anspaugh, L.R.; Andricevic, R. & Jacobson, R.L. Risk-based screening analysis of ground water contaminated by radionuclides introduced at the Nevada Test Site (NTS), report, June 1, 1993; California. (digital.library.unt.edu/ark:/67531/metadc622914/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.