Radionuclide content of Las Vegas Wash sediments

Rudin, Mark; Johnson, William H.; Meyers, Art

doi:10.1016/s0045-6535(97)00276-2

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…The 50th percentile CTE concentrations are much greater than the actual mean radionuclide concentrations for these areas because uranium concentrations across very large portions of these areas are at background levels. Uranium concentrations in sedimentary soils (similar to those at the KS and G-6 sites) in the Mojave desert are typically in the range of 3.0 to 4.4 ppm (unpublished data; Rudin et al, 1997;Johnson and Rudin, 2001;Johnson et al, 2004).…”

Section: Exposure Point Concentrationsmentioning

confidence: 96%

Ecological Risk Assessment of Radiological Exposure to Depleted Uranium in Soils at a Weapons Testing Facility

Cheng

Hlohowskyj

Tsao

2004

Soil and Sediment Contamination: An International Journal

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The potential for unacceptable risks to biota from radiological exposure to depleted uranium (DU) in soils was evaluated at two sites where DU weapons testing had been conducted in the past. A screening risk assessment was conducted to determine if measured concentrations of DU-associated radionuclides in site soils exceed radionuclide levels considered protective of biota. While concentrations of individual radionuclides did not exceed acceptable levels, total radionuclide concentrations could result in potentially unacceptable doses to exposed biota. Thus, a receptor-specific assessment was conducted to estimate external and internal radiological doses to vegetation and wildlife known or expected to occur at the sites. Wildlife evaluated included herbivores, omnivores, and top-level predators. Internal dose estimates to wildlife considered exposure via fugitive dust inhalation and soil and food ingestion; root uptake was the primary exposure route evaluated for vegetation. Total doses were compared with acceptable dose levels of 1.0 and 0.1 rad/day for vegetation and wildlife, respectively, with potentially unacceptable risks indicated for doses exceeding these levels. All estimated doses were below or approximated acceptable levels, typically by an order of magnitude or more. These results indicate that current levels of DU in soils do not pose unacceptable radiological risks to biota at the sites evaluated.

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Section: Exposure Point Concentrationsmentioning

confidence: 96%