摘要 :
Savannah River Site personnel are planning a two phase program in order to significantly reduce the amount of dissolved chlorinated solvents that are being transported to the McQueen branch Aquifer via the wellbore and gravel pack...
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Savannah River Site personnel are planning a two phase program in order to significantly reduce the amount of dissolved chlorinated solvents that are being transported to the McQueen branch Aquifer via the wellbore and gravel pack zones of the A/M Area production well system. In Phase I of the program a commercially available inflatable packer and check valve assembly will be installed inside the casing at the altitude of the McQueen Branch Confining Unit. This immediate, short term solution will eliminate the majority of the contaminant mass that is moving downward through the wellbore of the A/M Area production wells. During the packer installation process several pre- and post- testing activities are planned to aid SRS investigators in understanding the dynamics of the flow conditions and effectiveness of the installed assembly.The second phase of the program will address the small amount of contaminant mass that is moving downward through the continuous gravel pack of the production wells. The investigative data obtained during Phase I of this program will be beneficial for developing plans and appropriate actions for the Phase II activities. Site personnel are currently evaluating various options, i.e. casing perforation with grout injection or partial well abandonment, to eliminate the downward flow in the gravel pack at the altitude of the McQueen Branch Confining Zone. In addressing potential remediation actions for the dissolved solvents in the Cretaceous sediments, due to the limited vertical extent of the plume and the size, any remediation program should incorporate carefully located wells screened vertically within the plume trajectory.This optimizing approach will minimize water treatment and pumping costs and maximize the amount of contaminant removal. Flow and contaminant transport modeling scenarios are currently being developed to address the Cretaceous sediments. These efforts involve incorporating the available characterization data and the results of previous modeling work to more precisely define the extent and magnitude of this plume. SRS proposes incorporating depth discrete sampling during any future characterization effort to optimize any proposed remediation system. Finally, by using a full three-dimensional model rather than the traditional quasi-three dimensional methods an efficient remediation system can be developed.
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摘要 :
Savannah River Site personnel are planning a two phase program in order to significantly reduce the amount of dissolved chlorinated solvents that are being transported to the McQueen branch Aquifer via the wellbore and gravel pack...
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Savannah River Site personnel are planning a two phase program in order to significantly reduce the amount of dissolved chlorinated solvents that are being transported to the McQueen branch Aquifer via the wellbore and gravel pack zones of the A/M Area production well system. In Phase I of the program a commercially available inflatable packer and check valve assembly will be installed inside the casing at the altitude of the McQueen Branch Confining Unit. This immediate, short term solution will eliminate the majority of the contaminant mass that is moving downward through the wellbore of the A/M Area production wells. During the packer installation process several pre- and post- testing activities are planned to aid SRS investigators in understanding the dynamics of the flow conditions and effectiveness of the installed assembly.The second phase of the program will address the small amount of contaminant mass that is moving downward through the continuous gravel pack of the production wells. The investigative data obtained during Phase I of this program will be beneficial for developing plans and appropriate actions for the Phase II activities. Site personnel are currently evaluating various options, i.e. casing perforation with grout injection or partial well abandonment, to eliminate the downward flow in the gravel pack at the altitude of the McQueen Branch Confining Zone. In addressing potential remediation actions for the dissolved solvents in the Cretaceous sediments, due to the limited vertical extent of the plume and the size, any remediation program should incorporate carefully located wells screened vertically within the plume trajectory.This optimizing approach will minimize water treatment and pumping costs and maximize the amount of contaminant removal. Flow and contaminant transport modeling scenarios are currently being developed to address the Cretaceous sediments. These efforts involve incorporating the available characterization data and the results of previous modeling work to more precisely define the extent and magnitude of this plume. SRS proposes incorporating depth discrete sampling during any future characterization effort to optimize any proposed remediation system. Finally, by using a full three-dimensional model rather than the traditional quasi-three dimensional methods an efficient remediation system can be developed.
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This report gives an in-depth review of the provisions of the London Dumping Convention and of its origins in the context of the international legal framework for controlling all aspects of marine pollution. Particular attention i...
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This report gives an in-depth review of the provisions of the London Dumping Convention and of its origins in the context of the international legal framework for controlling all aspects of marine pollution. Particular attention is paid to the provisions concerning radioactive waste. (ERA citation 10:027758)
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This report gives an in-depth review of the provisions of the London Dumping Convention and of its origins in the context of the international legal framework for controlling all aspects of marine pollution. Particular attention i...
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This report gives an in-depth review of the provisions of the London Dumping Convention and of its origins in the context of the international legal framework for controlling all aspects of marine pollution. Particular attention is paid to the provisions concerning radioactive waste. (ERA citation 10:027758)
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Mechanical and hydrological properties of rock salt provide excellent bases for211 geological isolation of hazardous materials. Regulatory compliance determinations 211 for the Waste Isolation Pilot Plant (WIPP) stand as testament...
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Mechanical and hydrological properties of rock salt provide excellent bases for211 geological isolation of hazardous materials. Regulatory compliance determinations 211 for the Waste Isolation Pilot Plant (WIPP) stand as testament to the widely held 211 conclusion that salt provides excellent isolation properties. The WIPP saga began 211 in the 1950s when the U.S. National Academy of Sciences (NAS) recommended a salt 211 vault as a promising solution to the national problem of nuclear waste disposal. 211 For over 20 years, the Scientific basis for the NAS recommendation has been 211 fortified by Sandia National Laboratories through a series of large scale field 211 tests and laboratory investigations of salt properties. These scientific 211 investigations helped develop a comprehensive understanding of salt's 211 deformational behavior over an applicable range of stresses and temperature. 211 Sophisticated constitutive modeling, validated through underground testing, 211 provides the computational ability to model long-term behavior of repository 211 configurations. In concert with advancement of the mechanical models, fluid flow 211 measurements showed not only that the evaporite lithology was essentially 211 impermeable but that the WIPP setting was hydrologically inactive. Favorable 211 mechanical properties ensure isolation of materials placed in a salt geological 211 setting. Key areas of the geomechanics investigations leading to the 211 certification of WIPP me in situ experiments, laboratory tests, and shaft seal 211 design.
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The study was undertaken to determine the significant operation and maintenance (O & M) considerations that bear directly on the day in/day out air pollution compliance status of municipal waste combustors (MWC's). Two independent tasks were performed to compile and document these O & M considerations. First, seven MWC sites were visited to interview equipment operators and management personnel to determine the nature of the problems they routinely encounter in operating MWC systems. The information gathered from their visits is reported herein through a description of O & M problems and solutions for each major subsystem in the MWC process. The subsystems discussed include: fuel preparation and handling; furnace operation; ash handling; air pollution control equipment; fans, ducts and stacks; and procedural considerations such as startup/shutdown,...
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The study was undertaken to determine the significant operation and maintenance (O & M) considerations that bear directly on the day in/day out air pollution compliance status of municipal waste combustors (MWC's). Two independent tasks were performed to compile and document these O & M considerations. First, seven MWC sites were visited to interview equipment operators and management personnel to determine the nature of the problems they routinely encounter in operating MWC systems. The information gathered from their visits is reported herein through a description of O & M problems and solutions for each major subsystem in the MWC process. The subsystems discussed include: fuel preparation and handling; furnace operation; ash handling; air pollution control equipment; fans, ducts and stacks; and procedural considerations such as startup/shutdown, equipment inspection, and recordkeeping. Second, a field study was conducted to determine the effect of operating variables on visible emissions (opacity) at one facility. Ninety days of hourly readings of process and opacity data were collected by the MWC staff. An attempt was then made to statistically correlate the process and opacity data.
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The Idaho Nuclear Technology and Engineering Center (INTEC) is considering vitrification to process liquid sodium-bearing waste. Preliminary studies were completed to evaluate the potential secondary wastes from the melter off- ga...
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The Idaho Nuclear Technology and Engineering Center (INTEC) is considering vitrification to process liquid sodium-bearing waste. Preliminary studies were completed to evaluate the potential secondary wastes from the melter off- gas clean up systems. Projected secondary wastes comprise acidic and caustic scrubber solutions, HEPA filters, activated carbon, and ion exchange media. Possible treatment methods, waste forms, and disposal sites are evaluated from radiological and mercury contamination estimates.
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The pamphlet, produced by the state of Maine, informs campers on basic tips for waste reduction. Tips include ways to keep trash bag clean, how and which wastes can be burned, and what items you should pack for effective hauling, ...
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The pamphlet, produced by the state of Maine, informs campers on basic tips for waste reduction. Tips include ways to keep trash bag clean, how and which wastes can be burned, and what items you should pack for effective hauling, packaging, and disposal of trash.
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An important part of this project centered around five pilot projects that took place in February and March 2004. These pilot projects aimed to address key opportunities for technical improvements and behavior modification that im...
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An important part of this project centered around five pilot projects that took place in February and March 2004. These pilot projects aimed to address key opportunities for technical improvements and behavior modification that impact Manados overall solid waste management.
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