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Baseline Tritium Concentrations In Soils And Vegetation
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Book Synopsis Baseline Tritium Concentrations in Soils and Vegetation by :
Download or read book Baseline Tritium Concentrations in Soils and Vegetation written by and published by . This book was released on 1998 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: In compliance with Department of Energy (DOE) Order 5400.1, a preoperational environmental survey was conducted for the Tshirege woodland site--an experimental area managed by the Earth and Environmental Science Group (EES-15)--where radioactive tritium (3H) will be injected ten cm deep in and around the base of pinyon (Pinus edulis) and one-seeded juniper (Juniperus monosperma) trees during the summer of 1990. The site is located at the lower end of Canada del Buey close to the intersection of Pajarito and State Road 4. Baseline values of 3H were measured in soil and plant samples from five locations immediately surrounding the study area. Mean values of 3H in soils collected from the 0--5 and 25--30 cm depths were 1.24 ("0.22) and 1.08 ("0.41) pCi mL−1, respectively. Pinyon needles averaged 1.68 ("0.18) pCi mL−1 and blue grama grass (Bouteloua gracilis) averaged 1.16 ("0.95) pCi mL−1.
Book Synopsis Baseline Radionuclide Concentrations in Soils and Vegetation Around the Proposed Weapons Engineering Tritium Facility and the Weapons Subsystems Laboratory at TA-16 by :
Download or read book Baseline Radionuclide Concentrations in Soils and Vegetation Around the Proposed Weapons Engineering Tritium Facility and the Weapons Subsystems Laboratory at TA-16 written by and published by . This book was released on 1995 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A preoperational environmental survey is required by the Department of Energy (DOE) for all federally funded research facilities that have the potential to cause adverse impacts on the environment. Therefore, in accordance with DOE Order 5400.1, an environmental survey was conducted over the proposed sites of the Weapons Engineering Tritium Facility (WETF) and the Weapons Subsystems Laboratory (WSL) at Los Alamos National Laboratory (LANL) at TA-16. Baseline concentrations of tritium (3H), plutonium (238Pu and 239Pu) and total uranium were measured in soils, vegetation (pine needles and oak leaves) and ground litter. Tritium was also measured from air samples, while cesium (137Cs) was measured in soils. The mean concentration of airborne tritiated water during 1987 was 3.9 pCi/m3. Although the mean annual concentration of 3H in soil moisture at the 0--5 cm (2 in) soil depth was measured at 0.6 pCi/mL, a better background level, based on long-term regional data, was considered to be 2.6 pCi/mL. Mean values for 137Cs, 218Pu, 239Pu, and total uranium in soils collected from the 0--5 cm depth were 1.08 pCi/g, 0.0014 pCi/g, 0.0325 pCi/g, and 4.01 [mu]g/g, respectively. Ponderosa pine (Pinus ponderosa) needles contained higher values of 238Pu, 239Pu, and total uranium than did leaves collected from gambel's oak (Quercus gambelii). In contrast, leaves collected from gambel's oak contained higher levels of 137Cs than what pine needles did.
Book Synopsis Environmental Effects of a Tritium Release from the Savannah River Plant by :
Download or read book Environmental Effects of a Tritium Release from the Savannah River Plant written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: On March 27, 1981, a small amount of tritiated water was inadvertently released from the tritium-processing facility during a routine maintenance operation. This report describes the environmental effects of this release both on the SRP site and offsite. Also, the operation of the WIND (Wind Information and Display) emergency response system during the incident is discussed, and the predicted and diagnosed behavior of the tritium plume is compared with tritium concentrations deduced from air, vegetation, soil, and bioassay samples.
Book Synopsis Application of Tritium Tracer in Soil and Plant Water Investigations by : F. S. Nakayama
Download or read book Application of Tritium Tracer in Soil and Plant Water Investigations written by F. S. Nakayama and published by . This book was released on 1960 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Fate of Tritium in Soil and Vegetation by :
Download or read book Environmental Fate of Tritium in Soil and Vegetation written by and published by . This book was released on 2013 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tritium Transport Around Nuclear Facilities by :
Download or read book Tritium Transport Around Nuclear Facilities written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The transport and cycling of tritium around nuclear facilities is reviewed with special emphasis on studies at the Savannah River Laboratory, Aiken, South Carolina. These studies have shown that the rate of deposition from the atmosphere, the site of deposition, and the subsequent cycling are strongly influenced by the compound with which the tritium is associated. Tritiated hydrogen is largely deposited in the soil, while tritiated water is deposited in the greatest quantity in the vegetation. Tritiated hydrogen is converted in the soil to tritiated water that leaves the soil slowly, through drainage and transpiration. Tritiated water deposited directly to the vegetation leaves the vegetation more rapidly after exposure. Only a small part of the tritium entering the vegetation becomes bound in organic molecules. However, it appears tht the existence of soil organic compounds with tritium concentrations greater than the equilibrium concentration in the associated water can be explained by direct metabolism of tritiated hydrogen in vegetation.
Book Synopsis A Study on the Tritium Behavior in the Rice Plant After a Short-Term Exposure of HTO. by :
Download or read book A Study on the Tritium Behavior in the Rice Plant After a Short-Term Exposure of HTO. written by and published by . This book was released on 2002 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: In many Asian countries including Korea, rice is a very important food crop. Its grain is consumed by humans and its straw is used to feed animals. In Korea, there are four CANDU type reactors that release relatively large amounts of tritium into the environment. Since 1997, KAERI (Korea Atomic Energy Research Institute) has carried out the experimental studies to obtain domestic data on various parameters concerning the direct contamination of plant. In this study, the behavior of tritium in the rice plant is predicted and compared with the measurement performed at KAERI. Using the conceptual model of the soil-plant-atmosphere tritiated water transport system which was suggested by Charles E. Murphy, tritium concentrations in the soil and in leaves to time were derived. If the effect of tritium concentration in the soil is considered, the tritium concentration in leaves is described as a double exponential model. On the other hand if the tritium concentration in the soil is disregarded, the tritium concentration in leaves is described by a single exponential term as other models (e.g. Belot's or STAR-H3 model). Also concentration of organically bound tritium in the seed is predicted and compared with measurements. The results can be used to predict the tritium concentration in the rice plant at a field around the site and the ingestion dose following the release of tritium to the environment.
Book Synopsis Rapid Assessment of Soil and Groundwater Tritium by Vegetation Sampling by :
Download or read book Rapid Assessment of Soil and Groundwater Tritium by Vegetation Sampling written by and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Office of Environmental Management Technical Reports by :
Download or read book The Office of Environmental Management Technical Reports written by and published by . This book was released on 1997 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Atmospheric Tritium Release Database for Model Comparisons. Revision 1 by :
Download or read book An Atmospheric Tritium Release Database for Model Comparisons. Revision 1 written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A database of vegetation, soil, and air tritium concentrations at gridded coordinate locations following nine accidental atmospheric releases is described. While none of the releases caused a significant dose to the public, the data collected are valuable for comparison with the results of tritium transport models used for risk assessment. The largest, potential, individual off-site dose from any of the releases was calculated to be 1.6 mrem. The population dose from this same release was 46 person-rem which represents 0.04% of the natural background radiation dose to the population in the path of the release.
Book Synopsis Vertical Tritium Transport from the Shallow Unsaturated Zone to the Atmosphere, Amargosa Desert Research Site, Nevada by : Christina Amanda Garcia
Download or read book Vertical Tritium Transport from the Shallow Unsaturated Zone to the Atmosphere, Amargosa Desert Research Site, Nevada written by Christina Amanda Garcia and published by . This book was released on 2007 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the impact of desert vegetation on tritium transport and fate is essential when considering radioactive waste isolation in the western United States. This study uses filed data to estimate the magnitude and spatio-temporal variability of tritiated-water vapor tritium transport from the shallow unsaturated zone to the atmosphere adjacent to a radioactive waste facility and numerical modeling to clarify tritium transport mechanisms beneath desert vegetation. A 2-year tritiated-water vapor mass was released within the study area and quantified using evaporation, transpiration, and tritiated-water vapor concentrations in plants and shallow soil. Numerical simulation results indicate that root uptake by desert vegetation can lead to upward water movement below the root zone. This can increase the upward tritiated-water vapor flux. Amplified upward fluxes prevent long term shallow subsurface moisture accumulation, limiting moisture penetration below the root zone and the potential for groundwater contamination.--Adapted from the abstract.
Book Synopsis An Atmospheric Tritium Release Database for Model Comparisons by :
Download or read book An Atmospheric Tritium Release Database for Model Comparisons written by and published by . This book was released on 1991 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: A database of vegetation, soil, and air tritium concentrations at gridded coordinate locations following nine accidental atmospheric releases is described. While none of the releases caused a significant dose to the public, the data collected is valuable for comparison with the results of tritium transport models used for risk assessment. The largest, potential, individual off-site dose from any of the releases was calculated to be 1.6 mrem. The population dose from this same release was 46 person-rem which represents 0.04% of the natural background radiation dose to the population in the path of the release.
Book Synopsis Investigation of the Potential Impacts from Tritium Soil Contamination in the CP-5 Yard by :
Download or read book Investigation of the Potential Impacts from Tritium Soil Contamination in the CP-5 Yard written by and published by . This book was released on 1998 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a review of available data, significant contributions to low-level tritium soil contamination in the CP-5 yard have been made by airborne tritium fallout and rainout from the CP-5 ventilation system stack. Based on the distribution of tritium in the yard, it is also likely that leaks in secondary system piping which lead to the cooling towers were a significant contributor to tritium in CP-5 yard subsurface soil. Based on the foregoing analysis, low-level tritium contamination will not prohibit the release of the yard for unrestricted use in the future. Worst case dose estimates based on very conservative assumptions indicate that a 25 rmem annual effective dose equivalent limit will not be exceeded under the most restrictive residential-use family farm scenario. Given the impermeable nature of the glacial till under CP-5, low-level concentrations of tritium may be occasionally detected in the deep well (3300 12D), but the peak concentration will not approach the levels calculated by RESRAD; however, continued monitoring of the deep well is recommended. To ensure that all sources of potential tritium release have been removed from the CP-5 complex, removal of tritiated water from each rod-out hole and an evaluation of the physical integrity of the rod-out holes is recommended. This will also allow for an evaluation of tritium concentrations in shallow groundwater under CP-5 by sampling groundwater that is currently being forced into the drain tile system. Additional surface and subsurface soil sampling and analysis will be required to determine the final release status of soils around the Building 330 complex relative to elevated concentrations of CS-137, CO-60,Co-57, and Eu-152 identified during the 1993 IT Corporation characterization. The potential radiological impact from isolated elevations of the latter radionuclides is relatively low and can be evaluated as part of the final status survey of outdoor areas surrounding the Building 330 complex. In summary, the following activities are recommended: Remove tritiated water from each rod-out hole; Monitor rod-out hole tritium concentrations as they fill up with shallow groundwater; Continue groundwater monitoring and Perform surface and subsurface soil sampling around the CP-5 complex as part of the final status survey.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1996 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tritium Supply and Recycling Facilities Siting, Idaho National Engineering Laboratory [ID], Nevada Test Site [NV], Oak Ridge Reservatiom [TN], Pantex Plant [TX], Or Savannah River Site [SC] by :
Download or read book Tritium Supply and Recycling Facilities Siting, Idaho National Engineering Laboratory [ID], Nevada Test Site [NV], Oak Ridge Reservatiom [TN], Pantex Plant [TX], Or Savannah River Site [SC] written by and published by . This book was released on 1995 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inventory of energy research and development--1973-1975 by : Oak Ridge National Laboratory
Download or read book Inventory of energy research and development--1973-1975 written by Oak Ridge National Laboratory and published by . This book was released on 1976 with total page 1324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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