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Book Modeling Erosion and Transport of Depleted Uranium Yuma Proving Ground Arizona

Download or read book Modeling Erosion and Transport of Depleted Uranium Yuma Proving Ground Arizona written by and published by . This book was released on 1994 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high density, relative abundance, and metallic properties have made depleted uranium (DU) an obvious choice for high energy ballistic projectiles. The U.S. Army's Yuma Proving Ground (YPG) in southwest Arizona tests DU projectiles. When DU projectiles strike a target or the downrange ground surface, they fragment. Most of the fragments are collected after the test firings, but some are either too small or too dispersed to be easily found. Unfortunately, DU has some undesirable characteristics, it is a radioactive material (alpha particle emitter) and a toxic metal. Therefore, the fragments not found pose a potential environmental hazard at the YPG and to surrounding areas. The U.S. Army has contracted with the Los Alamos National Laboratory (LANL) to study the fate of DU at the YPG. In turn, LANL has contracted with New Mexico State University (NMSU) to investigate water transport of DU during rainfall-runoff events. Nine simulation runs were made on YPG soil containing DU fragments from the impact areas. The nine simulations consisted of three groups of three: rainfall simulation only, overland flow only, and rainfall/overland flow combination. Infiltration rates in the DU ballistic impact areas at YPG were very close to zero. Larger concentrations of DU were contained in the impact area soil which was retained by the 1 mm and 0.5 mm sieves when grain-size analysis was performed. After all nine simulations were completed, a mass balance of the uranium showed most DU remained in the soil box even under extreme hydraulic conditions, though about 7% (by weight) did exit the box. No DU was found in the suspended sediment samples and this suggests that most transport of DU is restricted to contact or bed-load movement during overland flow. Because the experiments were conducted to simulate extreme rainfall-runoff conditions, the probability of significant transport of DU from land surface appears to be low.

Book Long term Fate of Depleted Uranium at Aberdeen and Yuma Proving Grounds

Download or read book Long term Fate of Depleted Uranium at Aberdeen and Yuma Proving Grounds written by and published by . This book was released on 1996 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to evaluate the immediate and long-term consequences of depleted uranium (DU) in the environment at Aberdeen Proving Ground (APG) and Yuma Proving Ground (YPG) for the Test and Evaluation Command (TECOM) of the US Army. Specifically, we examined the potential for adverse radiological and toxicological effects to humans and ecosystems caused by exposure to DU at both installations. We developed contaminant transport models of aquatic and terrestrial ecosystems at APG and terrestrial ecosystems at YPG to assess potential adverse effects from DU exposure. Sensitivity and uncertainty analyses of the initial models showed the portions of the models that most influenced predicted DU concentrations, and the results of the sensitivity analyses were fundamental tools in designing field sampling campaigns at both installations. Results of uranium (U) isotope analyses of field samples provided data to evaluate the source of U in the environment and the toxicological and radiological doses to different ecosystem components and to humans. Probabilistic doses were estimated from the field data, and DU was identified in several components of the food chain at APG and YPG. Dose estimates from APG data indicated that U or DU uptake was insufficient to cause adverse toxicological or radiological effects. Dose estimates from YPG data indicated that U or DU uptake is insufficient to cause radiological effects in ecosystem components or in humans, but toxicological effects in small mammals (e.g., kangaroo rats and pocket mice) may occur from U or DU ingestion. The results of this study were used to modify environmental radiation monitoring plans at APG and YPG to ensure collection of adequate data for ongoing ecological and human health risk assessments.

Book Depleted Uranium Migration at Yuma Proving Ground

Download or read book Depleted Uranium Migration at Yuma Proving Ground written by Jane E. Rael and published by . This book was released on 1997 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Energy Research Abstracts

Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.

Book Dissertation Abstracts International

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1997 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Monthly Checklist of State Publications

Download or read book Monthly Checklist of State Publications written by Library of Congress. Exchange and Gift Division and published by . This book was released on 1994 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Government Reports Announcements Index

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1995 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Depleted Uranium Risk Assessment at Aberdeen Proving Ground

Download or read book Depleted Uranium Risk Assessment at Aberdeen Proving Ground written by and published by . This book was released on 1993 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Environmental Science Group at Los Alamos and the Test and Evaluation Command (TECOM) are assessing the risk of depleted uranium (DU) testing at Aberdeen Proving Ground (APG). Conceptual and mathematical models of DU transfer through the APG ecosystem have been developed in order to show the mechanisms by which DU migrates or remains unavailable to different flora and fauna and to humans. The models incorporate actual rates of DU transfer between different ecosystem components as much as possible. Availability of data on DU transport through different pathways is scarce and constrains some of the transfer rates that can be used. Estimates of transfer rates were derived from literature sources and used in the mass-transfer models when actual transfer rates were unavailable. Objectives for this risk assessment are (1) to assess if DU transports away from impact areas; (2) to estimate how much, if any, DU migrates into Chesapeake Bay; (3) to determine if there are appreciable risks to the ecosystems due to DU testing; (4) to estimate the risk to human health as a result of DU testing.

Book Modeling Exposure to Depleted Uranium in Support of Decommissioning at Jefferson Proving Ground Indiana

Download or read book Modeling Exposure to Depleted Uranium in Support of Decommissioning at Jefferson Proving Ground Indiana written by and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jefferson Proving Ground was used by the US Army Test and Evaluation Command for testing of depleted uranium munitions and closed in 1995 under the Base Realignment and Closure Act. As part of the closure of JPG, assessments of potential adverse health effects to humans and the ecosystem were conducted. This paper integrates recent information obtained from site characterization surveys at JPG with environmental monitoring data collected from 1983 through 1994 during DU testing. Three exposure scenarios were evaluated for potential adverse effects to human health: an occasional use scenario and two farming scenarios. Human exposure was minimal from occasional use, but significant risk were predicted from the farming scenarios when contaminated groundwater was used by site occupants. The human health risk assessments do not consider the significant risk posed by accidents with unexploded ordnance. Exposures of white-tailed deer to DU were also estimated in this study, and exposure rates result in no significant increase in either toxicological or radiological risks. The results of this study indicate that remediation of the DU impact area would not substantially reduce already low risks to humans and the ecosystem, and that managed access to JPG is a reasonable model for future land use options.

Book Pollution Abstracts

Download or read book Pollution Abstracts written by and published by . This book was released on 1994 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.