Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"deep borehole"”.
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Canister design for deep borehole disposal of nuclear waste
… spent nuclear fuel and other high-level waste in deep borehole repositories using currently available and proven oil, gas, and geothermal drilling technology. The canister is suitable for disposal of various waste forms, such as fuel assemblies and vitrified waste. The design addresses real and …
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A drop-in-concept for deep borehole canister emplacement
Disposal of high-level nuclear waste in deep boreholes drilled into crystalline bedrock (i.e., "granite") is an interesting repository alternative of long standing. Work at MIT over the past two decades, and more recently in collaboration with the Sandia National Laboratory, has examined a broad …
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Multiattribute utility functions for the deep borehole filter restoration problem
… decision problems using the example of the deep borehole filter restoration problem from the uranium extraction industry. In this problem, the filter of the production borehole (or well) is periodically contaminated or clogged, causing significant uranium output reduction. The efficient …
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Feasibility of very deep borehole disposal of US nuclear defense wastes
… waste from weapons production into a permanent borehole repository drilled ~4 km into granite basement rock. Two canister options were analyzed throughout the thesis: the canister currently used by the DOE for vitrified defense waste and a reference canister with a smaller diameter. In a thermal …
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Effective thermal conductivity measurements relevant to deep borehole nuclear waste disposal
… for disposal of high level nuclear waste in deep boreholes. This information is required to insure that waste temperatures will not exceed tolerable limits. Such experimental verification is essential because analytical models and empirical correlations can not accurately predict effective …
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Transient modeling of host rock for a deep borehole nuclear waste repository
… the thermal and hydrological processes in a deep borehole repository of spent nuclear fuel. Such simulation requires a fully coupled solver, capable of capturing the processes at the scale of tens of kilometers and millions of years. The MOOSE framework was chosen for this purpose, where the …
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Feasibility of lateral emplacement in very deep borehole disposal of high level nuclear waste
… One such technology is the use of very deep boreholes in monolithic granite to permanently segregate high level wastes from the biosphere. While research in this field has focused on vertical emplacement techniques, horizontal emplacement offers the significant advantages of allowing …
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Preliminary design and analysis for selected problems in deep borehole disposal of spent nuclear fuel
… of Sheffield have generated interest in deep boreholes as a nuclear waste disposal option for all or part of the U.S. high-level waste inventory. Many design elements of deep borehole disposal have not yet been solidified, and there has not yet been a systematic analysis of the logistics …
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Water borne transport of high level nuclear waste in very deep borehole disposal of high level nuclear waste
… report is to examine the feasibility of the very deep borehole experiment and to determine if it is a reasonable method of storing high level nuclear waste for an extended period of time. The objective of this thesis is to determine the escape mechanisms of radionuclides and to determine if …
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WOMEN’S WATER, WOMEN’S WORK: EVALUATING DECENTRALIZED MANAGEMENT OF DEEP BOREHOLE WELLS FOR IMPROVED RURAL WATER ACCESS IN TAWA FALL VILLAGE, SENEGAL
… public-private operation contracts to manage deep groundwater resources. In West Africa, Senegal currently counts itself among the few Sahelian countries having sufficient freshwater supplies to support its population’s growing domestic and industrial needs, though this is threatened by global …
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WOMEN’S WATER, WOMEN’S WORK: EVALUATING DECENTRALIZED MANAGEMENT OF DEEP BOREHOLE WELLS FOR IMPROVED RURAL WATER ACCESS IN TAWA FALL VILLAGE, SENEGAL
… public-private operation contracts to manage deep groundwater resources. In West Africa, Senegal currently counts itself among the few Sahelian countries having sufficient freshwater supplies to support its population’s growing domestic and industrial needs, though this is threatened by global …
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The thermal conductivity of filler materials and permeability of a cement sealant for deep borehole repositories for high level nuclear waste
… and high level waste (HLW). They also noted that deep boreholes drilled into granite bedrock may be a viable option. Among the major concerns regarding this type of repository are the retention of radionuclides and the tolerance of heat from the canisters in situ. As a barrier against …
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Hydrothermal spallation drilling and advanced energy conversion technologies for Engineered Geothermal Systems
… application of thermal spallation drilling to deep boreholes. Thermal spallation is the fragmentation of a brittle solid into small, disc-like flakes by rapidly heating a confined fraction of the rock. It was proposed that the necessary temperatures and heat fluxes needed to induce thermal …
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Establishing High-Resolution Hydrogeological, Geochemical and Isotopic Baseline Conditions of the Fresh Water Zone at a Field Research Site Near Brooks, Alberta, Canada
… was collected from a continuously cored 106.3 m deep borehole, a 100.0 m deep Westbay® multi-level system and a 67.1 m deep domestic well. The multi-level well with 26 ports revealed variability and stratification in hydrogeology and hydrochemistry. Ports completed in coals had high flow rates …
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Parametric study of the total system life cycle cost of an alternate nuclear waste management strategy using deep boreholes
… current mined geologic repository approach to a deep borehole disposal strategy would reduce the undiscounted total system life cycle cost by $19.4B, or 32%.
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Reservoir monitoring using induced seismicity at a petroleum field in Oman
… set of induced seismicity data recorded by a deep-borehole network over an 11-month period at the same field. About 5400 events are located and analyzed, and detailed mapping of faults and fractures using the event hypocenters are presented.
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Optimization of deep boreholes for disposal of high-level nuclear waste
This work advances the concept of deep borehole disposal (DBD), where spent nuclear fuel (SNF) is isolated at depths of several km in basement rock. Improvements to the engineered components of the DBD concept (e.g., plug, canister, and fill materials) are presented. Reference site parameters and …
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Fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics
… overlooked processes are central to describing borehole observations of fast ice-sheet motion --- intermediate-scale (<25 m, ⪅2 km) interaction of ice motion with realistic or real bed topography, and modulation of these ice-motion patterns through a basal layer of temperate ice (much softer ice …
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Study of induced seismicity for reservoir characterization
… by a sparse near-surface seismic network and a deep borehole seismic network. The majority of the events have a strike direction parallel with the major NE-SW faults in the region, and some events trend parallel with the NW-SE conjugate faults. The results are consistent with the in-situ well …