Thermal Gradient Migration Of Brine Inclusions In Salt
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Thermal Gradient Migration Of Brine Inclusions In Salt
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Author : Donald R. Olander
language : en
Publisher:
Release Date : 1980
Thermal Gradient Migration Of Brine Inclusions In Salt written by Donald R. Olander and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Crystals categories.
Study Of Thermal Gradient Induced Migration Of Brine Inclusions In Salt Final Report
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Author :
language : en
Publisher:
Release Date : 1984
Study Of Thermal Gradient Induced Migration Of Brine Inclusions In Salt Final Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Natural salt deposits, which are being considered for high-level waste disposal, contain a small volume fraction of water in the form of brine inclusions distributed throughout the salt. Radioactive decay heating of the nuclear wastes will impose a temperature gradient on the surrounding salt which mobilizes the brine inclusions. Inclusions filled completely with brine (the all-liquid inclusions) migrate up the temperature gradient and eventually accumulate brine near the buried waste forms. The brine may slowly corrode or degrade the waste forms, which is undesirable. Therefore it is important to consider the migration of brine inclusions in salt under imposed temperature gradients to properly evaluate the performance of a future salt repository for nuclear wastes. The migration velocities of the inclusions were found to be dependent on temperature, temperature gradient, and inclusion shape and size. The velocities were also dictated by the interfacial mass transfer resistance at brine/solid interface. This interfacial resistance depends on the dislocation density in the crystal, which in turn, depends on the axial compressive loading of the crystal. At low axial loads, the dependence between the velocity and temperature gradient is nonlinear. At high axial loads, the interfacial resistance is reduced and the migration velocity depends linearly on the temperature gradient. All-liquid inclusions filled with mixed brines were also studied. For gas-liquid inclusions, helium, air and argon were compared. Migration studies were also conducted on single crystallites of natural salt as well as in polycrystalline natural salt samples. The behavior of the inclusions at large-ange grain boundaries was observed.
Thermal Gradient Migration Of Brine Inclusions In Salt
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Author : D. R. Olander
language : en
Publisher:
Release Date : 1980
Thermal Gradient Migration Of Brine Inclusions In Salt written by D. R. Olander and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.
A Study Of Thermal Gradient Induced Migration Of Brine Inclusions In Salt
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Author : Donald R. Olander
language : en
Publisher:
Release Date : 1984
A Study Of Thermal Gradient Induced Migration Of Brine Inclusions In Salt written by Donald R. Olander and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Fluids categories.
Thermal Gradient Migration Of Brine Inclusion In Salt Crystals
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Author : Suresh Kumar Yagnik
language : en
Publisher:
Release Date : 1982
Thermal Gradient Migration Of Brine Inclusion In Salt Crystals written by Suresh Kumar Yagnik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.
Thermal Gradient Migration Of Brine Inclusions In Salt Crystals
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Author : Suresh Kumar Yagnik
language : en
Publisher:
Release Date : 1982
Thermal Gradient Migration Of Brine Inclusions In Salt Crystals written by Suresh Kumar Yagnik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.
Thermal Gradient Migration Of Brine Inclusions In Salt Crystals Synthetic Single Crystals Of Nacl And Kcl
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Author :
language : en
Publisher:
Release Date : 1982
Thermal Gradient Migration Of Brine Inclusions In Salt Crystals Synthetic Single Crystals Of Nacl And Kcl written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.
It has been proposed that high-level nuclear waste be disposed in a geologic repository. Natural-salt deposits, which are being considered for this purpose, contain a small volume fraction of water in the form of brine inclusions distributed throughout the salt. Radioactive-decay heating of the nuclear wastes will impose a temperature gradient on the surrounding salt which mobilizes the brine inclusions. Inclusions filled completely with brine migrate up the temperature gradient and eventually accumulate brine near the buried waste forms. The brine may slowly corrode or degrade the waste forms which is undesirable. In this work, thermal gradient migration of both all-liquid and gas-liquid inclusions was experimentally studied in synthetic single crystals of NaCl and KCl using a hot-stage attachment to an optical microscope which was capable of imposing temperature gradients and axial compressive loads on the crystals. The migration velocities of the inclusions were found to be dependent on temperature, temperature gradient, and inclusion shape and size. The velocities were also dictated by the interfacial mass transfer resistance at brine/solid interface. This interfacial resistance depends on the dislocation density in the crystal, which in turn, depends on the axial compressive loading of the crystal. At low axial loads, the dependence between the velocity and temperature gradient is non-linear. At high axial loads, however, the interfacial resistance is reduced and the migration velocity depends linearly on the temperature gradient. All-liquid inclusions filled with mixed brines were also studied. For gas-liquid inclusions, three different gas phases (helium, air and argon) were compared. Migration studies were also conducted on single crystallites of natural salt as well as in polycrystalline natural salt samples. The behavior of the inclusions at large angle grain boundaries was observed. 35 figures, 3 tables.
Thermal Gradient Migration Of Brine Inclusions In Salt
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Author :
language : en
Publisher:
Release Date : 1982
Thermal Gradient Migration Of Brine Inclusions In Salt written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.
It has been proposed that the high level nuclear waste be buried deep underground in a suitable geologic formation. Natural salt deposits have been under active consideration as one of the geologic formations where a nuclear waste repository may be built in future. The salt deposits, however, are known to contain a small amount (about 0.5 vol.%) of water in the form of brine inclusions which are dispersed throughout the medium. The temperature gradients imposed by the heat generating nuclear waste will mobilize these brine inclusions. It is important to know the rate and the amount of brine accumulating at the waste packages to properly evaluate the performance of a nuclear waste repository. An extensive experimental investigation of the migration velocities of brine inclusions in synthetic single crystals of NaCl and in polycrystalline natural salt crystals has been conducted. The results show that in a salt repository the brine inclusions within a grain would move with the diffusion controlled velocities. The brine reaching a grain boundary may be swept across, if the thermal gradient is high enough. Grain boundaries in polycrystalline rock salt are apparently quite weak and open up due to drilling the hole for a waste canister and to the thermal stresses which accompany the thermal gradient produced by the heat generating waste. The enhanced porosity allows the water reaching the grain boundary to escape by a vapor transport process.
Brine Migration In Hot Pressed Polycrystalline Sodium Chloride
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Author : J. V. Biggers
language : en
Publisher:
Release Date : 1982
Brine Migration In Hot Pressed Polycrystalline Sodium Chloride written by J. V. Biggers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Radioactive waste disposal in the ground categories.
Thermal Gradient Brine Inclusion Migration In Salt Study
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Author : Donald R. Olander
language : en
Publisher:
Release Date : 1979
Thermal Gradient Brine Inclusion Migration In Salt Study written by Donald R. Olander and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Salt categories.