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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Kobayashi, Ichizo Fujisawa, Soh Nakajima, Makoto Toida, Masaru Nakashima, Hitoshi Asano, Hidekazu |
| Copyright Year | 2010 |
| Abstract | The shotclay method is construction method of the high density bentonite engineered barrier by spraying method. Using this method, the dry density of 1.6 Mg/m3, which was considered impossible with the spray method, is achieved. In this study, the applicability of the shotclay method to HLW bentonite-engineered barriers was confirmed experimentally. In the tests, an actual scale vertical-type HLW bentonite-engineered barrier was constructed. This was a bentonite-engineered barrier with a diameter of 2.22 m and a height of 3.13 m. The material used was bentonite with 30% silica sand, and water content was adjusted by mixing chilled bentonite with powdered ice before thawing. Work progress was 11.2 m3 and the weight was 21.7 Mg. The dry density of the entire buffer was 1.62 Mg/m3, and construction time was approximately 8 hours per unit. After the formworks were removed, the core and block of the actual scale HLW bentonite-engineered barrier were sampled to confirm homogeneity. As a result, homogeneity was confirmed, and no gaps were observed between the formwork and the buffer material and between the simulated waste and the buffer material. The applicability to HLW of the shotclay method has been confirmed through this examination. |
| Sponsorship | Nuclear Engineering Division and Environmental Engineering Division |
| Starting Page | 451 |
| Ending Page | 458 |
| Page Count | 8 |
| File Format | |
| ISBN | 9780791854532 |
| DOI | 10.1115/ICEM2010-40236 |
| e-ISBN | 9780791838884 |
| Volume Number | ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 2 |
| Conference Proceedings | ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management |
| Language | English |
| Publisher Date | 2010-10-03 |
| Publisher Place | Tsukuba, Japan |
| Access Restriction | Subscribed |
| Subject Keyword | Buffer material Spray method Density distribution Water Construction Sprays Spraying (coating processes) Ice Thawing Polishing equipment Density Design Sands Weight (mass) Radioactive waste repositories Plasma spraying |
| Content Type | Text |
| Resource Type | Article |
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