Hydrothermal interaction of Topopah Spring tuff with J-13 water as a function of temperature

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In support of the Nevada Nuclear Waste Storage Investigations Project experiments were conducted to study the hydrothermal interaction of rock and water representative of a potential repository in tuff. These experiments provided data relevant to near-field repository conditions that can be used to: assess the ability to use accelerated tests based on the SA/V (surface area/volume) parameter and temperature; allow the measurement of chemical changes in phases present in the tuff before reaction as well as the identification and chemical analysis of secondary phases resulting from hydrothermal reactions; and demonstrate the usefulness of geochemical modeling in a repository environment using … continued below

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9 p.

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Knauss, K. G.; Delany, J. M.; Beiriger, W. J. & Peifer, D. W. November 30, 1984.

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In support of the Nevada Nuclear Waste Storage Investigations Project experiments were conducted to study the hydrothermal interaction of rock and water representative of a potential repository in tuff. These experiments provided data relevant to near-field repository conditions that can be used to: assess the ability to use accelerated tests based on the SA/V (surface area/volume) parameter and temperature; allow the measurement of chemical changes in phases present in the tuff before reaction as well as the identification and chemical analysis of secondary phases resulting from hydrothermal reactions; and demonstrate the usefulness of geochemical modeling in a repository environment using the EQ3/6 thermodynamic/kinetic geochemical modeling code. Crushed tuff and polished wafers of tuff were reacted with a natural ground water in Dickson-type gold-cell rocking autoclaves which were periodically sampled under in-situ conditions. Results were compared with predictions based on the EQ3/6 geochemical modeling code. Eight short-term experiments (2 to 3 months) at 150{sup 0}C and 250{sup 0}C have been completed using tuff from both drillcore and outcrop. Long-term experiments at 90{sup 0}C and 150{sup 0}C using drillcore polished wafers are in progress. This paper will focus on the results of the 150{sup 0}C and 250{sup 0}C experiments using drill core polished wafers. 11 references, 4 figures.

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9 p.

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NTIS, PC A02/MF A01; OSTI as DE85004412

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  • Materials Research Society annual meeting, Boston, MA (United States), 26-29 Nov 1984

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  • November 30, 1984

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  • Aug. 14, 2015, 8:43 a.m.

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  • July 3, 2020, 4:38 p.m.

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Knauss, K. G.; Delany, J. M.; Beiriger, W. J. & Peifer, D. W. Hydrothermal interaction of Topopah Spring tuff with J-13 water as a function of temperature, report, November 30, 1984; California. (https://digital.library.unt.edu/ark:/67531/metadc693043/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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