ChemInform Abstract: ESTIMATION OF THERMOCHEMICAL DATA FOR CALCIUM SILICATE HYDRATE (C‐S‐H)

Fujii, Kinjiro; Kondo, W.

doi:10.1002/chin.198413017

Cited by 17 publications

(27 citation statements)

References 1 publication

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“…The sources reviewed in this compilation effort (Taylor 1990;Reardon 1992;Bruton et al 1993;Atkins et al 1992;Neall 1996;Batchelor and Wu 1993;Sarkar et al 1982;Atkins et al 1993;Shaw et al 2000;Glasser et al 1987;Damidot et al 1994;Bennett et al 1992;Babushkin et al 1985;Greenberg and Chang 1965;Fujii and Kondo 1983;Harvie et al 1984;MacPhee et al 1989;Berner 1987Berner , 1990Greenberg and Moller 1989;Perkins andPalmer 1999, Matschei et al, 2007). Some of these sources also include previous modeling studies from U.S. and international nuclear waste research programs.…”

Section: Thermodynamic Data and Modeling Of Cement Phasesmentioning

confidence: 99%

“…The only exception is for the minerals gypsum and sepiolite where the log K values are only given up to 300°C. Data for the calcium silicate hydrate (CSH) cement phase are from Fujii and Kondo (1983). Thermodynamic data for supporting aqueous species in all cement reactions are given in Wolery and Jové-Colón (2007).…”

Section: Thermodynamic Data and Modeling Of Cement Phasesmentioning

confidence: 99%

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Disposal systems evaluations and tool development : Engineered Barrier System (EBS) evaluation.

Rutqvist¹,

Liu²,

Steefel³

et al. 2011

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Eric Sonnenthal (LBNL) Engineered Barrier System (EBS) Evaluation This page is intentionally left blank Engineered Barrier System (EBS) Evaluation 5 Executive SummaryKey components of the nuclear fuel cycle are short-term storage and long-term disposal of nuclear waste. The latter encompasses the immobilization of used nuclear fuel (UNF) and radioactive waste streams generated by various phases of the nuclear fuel cycle, and the safe and permanent disposition of these waste forms in geological repository environments. The engineered barrier system (EBS) plays a very important role in the long-term isolation of nuclear waste in geological repository environments. EBS concepts and their interactions with the natural barrier are inherently important to the long-term performance assessment of the safety case where nuclear waste disposition needs to be evaluated for time periods of up to one million years. Making the safety case needed in the decision-making process for the recommendation and the eventual embracement of a disposal system concept requires a multi-faceted integration of knowledge and evidence-gathering to demonstrate the required confidence level in a deep geological disposal site and to evaluate longterm repository performance.The focus of this report is the following:• Evaluation of EBS in long-term disposal systems in deep geologic environments with emphasis on the multi-barrier concept;• Evaluation of key parameters in the characterization of EBS performance;• Identification of key knowledge gaps and uncertainties;• Evaluation of tools and modeling approaches for EBS processes and performance.The above topics will be evaluated through the analysis of the following:• Overview of EBS concepts for various NW disposal systems;• Natural and man-made analogs, room chemistry, hydrochemistry of deep subsurface environments, and EBS material stability in near-field environments;• Reactive Transport and Coupled Thermal-Hydrological-Mechanical-Chemical (THMC) processes in EBS;• Thermal analysis toolkit, metallic barrier degradation mode survey, and development of a Disposal Systems Evaluation Framework (DSEF).This report will focus on the multi-barrier concept of EBS and variants of this type which in essence is the most adopted concept by various repository programs. Empasis is given mainly to the evaluation of EBS materials and processes through the analysis of published studies in the scientific literature of past and existing repository research programs. Tool evaluations are also emphasized, particularly on THCM processes and chemical equilibria. Although being an increasingly important aspect of NW disposition, short-term or interim storage of NW will be briefly discussed but not to the extent of the EBS issues relevant to disposal systems in deep geologic environments. Interim storage will be discussed in the report Evaluation of Storage Concepts FY10 Final Report (Weiner et al. 2010). Engineered Barrier System (EBS) Evaluation 6This page is intentionally left blank Engineered Barrier System (EBS) Eva...

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Section: Thermodynamic Data and Modeling Of Cement Phasesmentioning

confidence: 99%

Section: Thermodynamic Data and Modeling Of Cement Phasesmentioning

confidence: 99%

Disposal systems evaluations and tool development : Engineered Barrier System (EBS) evaluation.

Rutqvist¹,

Liu²,

Steefel³

et al. 2011

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show abstract

“…Chemical interactions between water and nonthermally treated grout at 20° to 60°C may well be dominated by the dissolution kinetics of the unstable amorphous and crystalline phases and precipitation kinetics of the metastable or stable phases (e.g., Atkins et al, 1991). Tobermorite (14•) forms in water at temperatures less than 80°C (Fujii and Kondo, 1983), but it begins to lose interlayer water at 70°C in dry CO 2 -free air to yield 11• tobermorite (Taylor, 1987). This type of low-temperature interaction has received much attention internationally and can be found in the radioactive-waste-disposal literature.…”

Section: Cementitious Materialsmentioning

confidence: 99%

“…We acknowledge the reviews of Charles Carrigan, Richard Knapp Experimental data used to build and fit the model Flint and Wells, 1934Fujii and Kondo, 1983Greenberg and Chang, 1965Kalousek, 1952Roller and Ervin, 1940Taylor, 1950Fujii and Kondo, 1983Greenberg and Chang, 1965Roller and Ervin, 1940Suzuki et al, 1985 …”

Section: Acknowledgmentsmentioning

confidence: 99%

Near-field/altered-zone models report

Hardin¹

1998

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“…Tobermorite (14 Å) forms in water at temperatures below 80°C (Fujii and Kondo, 1983). This phase begins to lose interlayer water at 70°C in dry CO 2 -free air to give 11Å tobermorite (Taylor, 1987).…”

Section: Synthesis Report On Thermally Driven Coupled Processes 2-35mentioning

ChemInform Abstract: ESTIMATION OF THERMOCHEMICAL DATA FOR CALCIUM SILICATE HYDRATE (C‐S‐H)

Cited by 17 publications

References 1 publication

Disposal systems evaluations and tool development : Engineered Barrier System (EBS) evaluation.

Disposal systems evaluations and tool development : Engineered Barrier System (EBS) evaluation.

Near-field/altered-zone models report

Synthesis report on thermally driven coupled processes

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