A STUDY OF THE PRESSURE SOLUTION AND DEFORMATION OF QUARTZ CRYSTALS AT HIGH pH AND UNDER HIGH STRESS
Bentonite is generally used as a buffer material in high-level radioactive waste disposal facilities and consists of 50% quartz by weight. Quartz strongly affects the behavior of bentonite over very long periods. For this reason, quartz dissolution experiment was performed under high-pressure and hi...
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| Format: | Article |
| Language: | English |
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Elsevier
2013-02-01
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| Series: | Nuclear Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573315300061 |
| _version_ | 1818501799689060352 |
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| author | JUNG-HAE CHOI YONG-SEOK SEO BYUNG-GON CHAE |
| author_facet | JUNG-HAE CHOI YONG-SEOK SEO BYUNG-GON CHAE |
| author_sort | JUNG-HAE CHOI |
| collection | DOAJ |
| description | Bentonite is generally used as a buffer material in high-level radioactive waste disposal facilities and consists of 50% quartz by weight. Quartz strongly affects the behavior of bentonite over very long periods. For this reason, quartz dissolution experiment was performed under high-pressure and high-alkalinity conditions based on the conditions found in a high-level radioactive waste disposal facility located deep underground. In this study, two quartz dissolution experiments were conducted on 1) quartz beads under low-pressure and high-alkalinity conditions and 2) a single quartz crystal under high-pressure and high-alkalinity conditions. Following the experiments, a confocal laser scanning microscope (CLSM) was used to observe the surfaces of experimental samples. Numerical analyses using the finite element method (FEM) were also performed to quantify the deformation of contact area. Quartz dissolution was observed in both experiments. This deformation was due to a concentrated compressive stress field, as indicated by the quartz deformation of the contact area through the FEM analysis. According to the numerical results, a high compressive stress field acted upon the neighboring contact area, which showed a rapid dissolution rate compared to other areas of the sample. |
| first_indexed | 2024-12-10T21:01:12Z |
| format | Article |
| id | doaj.art-d6d8306274a04a5385919457889ba6fa |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-10T21:01:12Z |
| publishDate | 2013-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-d6d8306274a04a5385919457889ba6fa2022-12-22T01:33:48ZengElsevierNuclear Engineering and Technology1738-57332013-02-01451536010.5516/NET.06.2012.024A STUDY OF THE PRESSURE SOLUTION AND DEFORMATION OF QUARTZ CRYSTALS AT HIGH pH AND UNDER HIGH STRESSJUNG-HAE CHOI0YONG-SEOK SEO1BYUNG-GON CHAE2Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, KoreaDepartment of Earth and Environmental Sciences, Chungbuk National University, Cheongju 361-763, KoreaGeologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, KoreaBentonite is generally used as a buffer material in high-level radioactive waste disposal facilities and consists of 50% quartz by weight. Quartz strongly affects the behavior of bentonite over very long periods. For this reason, quartz dissolution experiment was performed under high-pressure and high-alkalinity conditions based on the conditions found in a high-level radioactive waste disposal facility located deep underground. In this study, two quartz dissolution experiments were conducted on 1) quartz beads under low-pressure and high-alkalinity conditions and 2) a single quartz crystal under high-pressure and high-alkalinity conditions. Following the experiments, a confocal laser scanning microscope (CLSM) was used to observe the surfaces of experimental samples. Numerical analyses using the finite element method (FEM) were also performed to quantify the deformation of contact area. Quartz dissolution was observed in both experiments. This deformation was due to a concentrated compressive stress field, as indicated by the quartz deformation of the contact area through the FEM analysis. According to the numerical results, a high compressive stress field acted upon the neighboring contact area, which showed a rapid dissolution rate compared to other areas of the sample.http://www.sciencedirect.com/science/article/pii/S1738573315300061Quartz DissolutionQuartz BeadsConfocal Laser Scanning MicroscopeFinite Element Method |
| spellingShingle | JUNG-HAE CHOI YONG-SEOK SEO BYUNG-GON CHAE A STUDY OF THE PRESSURE SOLUTION AND DEFORMATION OF QUARTZ CRYSTALS AT HIGH pH AND UNDER HIGH STRESS Nuclear Engineering and Technology Quartz Dissolution Quartz Beads Confocal Laser Scanning Microscope Finite Element Method |
| title | A STUDY OF THE PRESSURE SOLUTION AND DEFORMATION OF QUARTZ CRYSTALS AT HIGH pH AND UNDER HIGH STRESS |
| title_full | A STUDY OF THE PRESSURE SOLUTION AND DEFORMATION OF QUARTZ CRYSTALS AT HIGH pH AND UNDER HIGH STRESS |
| title_fullStr | A STUDY OF THE PRESSURE SOLUTION AND DEFORMATION OF QUARTZ CRYSTALS AT HIGH pH AND UNDER HIGH STRESS |
| title_full_unstemmed | A STUDY OF THE PRESSURE SOLUTION AND DEFORMATION OF QUARTZ CRYSTALS AT HIGH pH AND UNDER HIGH STRESS |
| title_short | A STUDY OF THE PRESSURE SOLUTION AND DEFORMATION OF QUARTZ CRYSTALS AT HIGH pH AND UNDER HIGH STRESS |
| title_sort | study of the pressure solution and deformation of quartz crystals at high ph and under high stress |
| topic | Quartz Dissolution Quartz Beads Confocal Laser Scanning Microscope Finite Element Method |
| url | http://www.sciencedirect.com/science/article/pii/S1738573315300061 |
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