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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Ohno, Shintaro Morikawa, Seiji Mihara, Morihiro |
| Copyright Year | 2009 |
| Abstract | MACBECE (Mechanical Analysis system considering Chemical transitions of BEntonite-based and CEment-based materials) is an analysis system to evaluate the long term mechanical behavior in the TRU (TRans Uranium) waste disposal system. TRU wastes are low level radioactive wastes that include long-lived nuclides. MACBECE is the system to calculate mechanical and chemical behavior in the near field including engineered barriers in the TRU waste disposal system, and subsequently to evaluate the hydraulic property in various components. MACBECE can evaluate the mechanical/ hydraulic alterations of two types of barrier materials, cement-based and bentonite-based materials. These materials, in the long-term, may be altered internally by chemical reaction. To evaluate the long-term mechanical behavior due to the chemical transitions, the nonlinear elastic model for the cement-based materials and the elasto-viscoplastic model for the bentonite-based materials were applied, based on the data from various laboratory tests. Also, proposed models based on the data from permeability tests were applied to evaluate the alteration of hydraulic conductivity. So as to realize the high reliable evaluation, the variable-compliance-type constitutive model proposed by Okubo (1992) was newly adopted for the rock creep evaluation in MACBECE. This creep model can express analytically nonlinear visco-elastic behavior and the over-peak-strength state behavior. This paper focuses on the adoptability of rock creep model in MACBECE. Applicability of the rock creep model is verified by conducting the numerical simulations with the long-term mechanical interaction between the TRU waste disposal system and the host rock. |
| Sponsorship | Nuclear Engineering Division and Environmental Engineering Division |
| Starting Page | 291 |
| Ending Page | 297 |
| Page Count | 7 |
| File Format | |
| ISBN | 9780791844076 |
| DOI | 10.1115/ICEM2009-16110 |
| e-ISBN | 978079183865X |
| Volume Number | ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 1 |
| Conference Proceedings | ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management |
| Language | English |
| Publisher Date | 2009-10-11 |
| Publisher Place | Liverpool, UK |
| Access Restriction | Subscribed |
| Subject Keyword | Viscoelasticity Cements (adhesives) Mechanical behavior Radioactive wastes Creep Computer simulation Chemical reactions Hydraulic conductivity Permeability Waste disposal Uranium Rocks Constitutive equations Nuclides |
| Content Type | Text |
| Resource Type | Article |
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