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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Ijiri, Yuji Naemura, Yumi Amano, Kenji Maekawa, Keisuke Sawada, Atsushi Ota, Kunio Kunimaru, Takanori |
| Copyright Year | 2010 |
| Abstract | In-situ tracer tests are a valuable approach to obtain parameters for a performance assessment of nuclear waste repository. A one-dimensional model is simple and is commonly used to identify radionuclide transport parameters by fitting breakthrough curves simulated using the model to those obtained from tracer tests. However, this method can increase uncertainty and introduce errors in the estimated parameters. In particular, such uncertainties and errors will be significant when evaluating parameters for tests conducted in a dipole (two-dimensional) flow field between injection and withdrawal wells. This paper describes a numerical analysis investigation into the effects of various experimental conditions on parameters estimated using a one-dimensional model for cases involving tracer tests in a two-dimensional fracture plane. Results show that longitudinal dispersivity tends to be overestimated by the one-dimensional model analysis. This overestimation is the result of several factors: smaller pumping rate, larger dipole ratio, stronger heterogeneity of the fracture hydraulic conductivity, and greater orthogonally-oriented background groundwater flow. Such information will help us to better plan and design tracer tests at underground research laboratories located in both Mizunami in central Japan and Horonobe in northern Japan. Understanding appropriate experimental conditions will help decrease the uncertainty in the results of tracer tests. |
| Sponsorship | Nuclear Engineering Division and Environmental Engineering Division |
| Starting Page | 221 |
| Ending Page | 228 |
| Page Count | 8 |
| File Format | |
| ISBN | 9780791854532 |
| DOI | 10.1115/ICEM2010-40077 |
| 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 | Uncertainty Radioactive wastes Radioisotopes Dipoles (electromagnetism) Hydraulic conductivity Fracture (materials) Flow (dynamics) Design Errors Fracture (process) Fittings Numerical analysis Groundwater Wells |
| Content Type | Text |
| Resource Type | Article |
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