Download or read book Assessing Seal Performance and Parameter Sensitivity with a Full shaft Model written by and published by . This book was released on 1998 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Waste Isolation Pilot Plant (WIPP) is a planned geologic repository for permanent disposal of transuranic waste generated by US government defense programs. Located near Carlsbad in southeastern New Mexico, the facility's disposal regions are mined from the bedded salt of the Salado Formation at a depth of approximately 652 m. Four shafts service the operational needs of the facility for air intake, exhaust, waste handling and salt handling. These shafts range in diameter from 3.5 to 6.1 m and extend from the ground surface to the repository. During repository closure, following an operational life of approximately 50 years, these shafts will be sealed in accordance with an acceptable design. Under contract to the US Department of Energy (DOE), the Repository Isolation Systems Department (RISD) of Sandia National Laboratories has developed a design for the WIPP shaft sealing system. This design has been reviewed by the US Environmental Protection Agency (EPA) as part of the 1996 WIPP Compliance Certification Application (CCA). An effective shaft sealing system for the WIPP will limit liquid and gas flows, and permanently prevent the migration of radiological or other hazardous constituents through the sealed shafts from repository to accessible environment. Because of these performance objectives, a significant effort has been directed toward evaluation of the seal design. Whereas RISD (1996) provides a comprehensive discussion, this paper focuses on only one aspect of the evaluation effort, namely a full shaft, fluid flow model.
Download or read book The Office of Environmental Management Technical Reports A Bibliography written by and published by DIANE Publishing. This book was released on 2001 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Office of Environmental Management's (EM) technical reports bibliography is an annual publication that contains information on scientific and technical reports sponsored by the Office of Environmental Management added to the Energy Science and Technology Database from July 1, 1994 through June 30, 1995. This information is divided into the following categories: Focus Areas, Cross-Cutting Programs, and Support Programs. In addition, a category for general information is included. EM's Office of Science and Technology sponsors this bibliography.
Download or read book Evaluation of Coupled Hydro mechanical H M Behaviour of in Situ Shaft Sealing Components for Used Nuclear Fuel written by Chang Seok Kim and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A full-scale shaft seal that is a composite concrete-clay-concrete seal was installed at Canada's Underground Research Laboratory (URL). This installation spans a major water-bearing fracture zone located at a depth of 275 m and is intended to isolate two hydrogeochemcial regimes. Coupled Hydro-Mechanical (H-M) constitutive models were developed to examine performance of the H-M behaviour of the shaft seal. H-M parameters of the shaft seal components were determined using laboratory test data. The numerical results were compared with field readings regarding water uptake and development of total pressure in the system. Numerical prediction shows that the hydration process of the clay seal is dominantly affected by the groundwater flow from FZ2. Overall, numerical prediction shows reasonably good agreement with field readings; however, it underestimates evolution of total stresses. The possible reason could be that radial groundwater flow toward the system was not considered in the simplified 2-D modelling. Prediction of swelling pressure of the unsaturated clay seal is discussed. The first model using crystalline and osmotic swelling mechanisms estimates a swelling pressure of 0.86 MPa, which is close to what is expected (0.8 MPa) in the field. Another model applying confined conditions estimates a swelling pressure of 0.41 MPa. This difference in swelling pressure prediction could be attributed to different microstructures developed under different confining conditions. The model predictions were then verified in terms of the water retention capacity of the clay seal and show reasonably good agreement with the measured data. Sensitivity analyses were conducted to assess effects of variations of H-M parameters on evolution of H-M behaviour of the clay seal. Several sets of hydraulic and Barcelona Basic Model (BBM) mechanical parameters of the clay seal were determined using available laboratory test data. The numerical results indicate that the behaviour of the clay seal is more sensitive to hydraulic parameters than BBM mechanical parameters. Different sets of H-M parameters were obtained from the same clay material. For this reason, sensitivity analysis of the parameters and validation of the predictions are required to improve the possibility to match field and modelled behaviour.
Download or read book High Level Radioactive Waste Management written by and published by . This book was released on 1998 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Site Characterization Progress Report written by and published by . This book was released on with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Assessment Methodology Demonstration written by Melvin G. Marietta and published by . This book was released on 1989 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Site Characterization Progress Report Yucca Mountain Nevada DOE RW 0498 April 1997 written by and published by . This book was released on 1997 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Status of Borehole Plugging Shaft Sealing for Geologic Isolation of Radioactive Waste written by D'Appolonia Consulting Engineers and published by . This book was released on 1979 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NUREG CR written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1979 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Model for Seal Contact Pressure written by Sayyad Zahid Qamar and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Swellable elastomers are used for zonal isolation and as an alternate to cementing is a new approach, resulting in significant reduction in time, cost, and weight. Very large strains, flexibility, resilience, and durability are their special features. Performance analysis is important design improvement and appropriate selection of swell packers. Experimental evaluation of swelling-elastomer seal performance can be very costly, and is not even possible in many cases. Numerical simulations (Chapters 8 and 9) can be more convenient, but computational effort and cost can be high. Development of closed-form (analytical) solutions is presented in this chapter to estimate the variation of contact pressure along the length of the elastomer seal. Major relevant parameters are properties of the material elastomer, seal configuration and size, magnitude of seal compression, and differential pressure across the seal. Numerical (finite element) modeling and simulation is also performed. There was good conformity between analytical and simulation results, validating the soundness of the analytical solution, and providing assurance that it can reliably predict the sealing response of the elastomer. A comprehensive parametric study is then conducted to assess seal performance while varying different key factors. Properties of the elastomer material (as it swells with exposure time) are required to run the analytical and the FE models. A large set of experiments were therefore designed and conducted to evaluate mechanical properties (E, G, K, and v) of the elastomer with gradual swelling (Chapters 3 and 7).
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Plan for Disposal system Characterization and Long term Performance Evaluation of the Waste Isolation Pilot Plant written by and published by . This book was released on 1989 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radioactive Waste Management written by and published by . This book was released on 1981 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Review of the Status of the Waste Isolation Pilot Plant Project written by United States. Congress. House. Committee on Government Operations. Environment, Energy, and Natural Resources Subcommittee and published by . This book was released on 1990 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Tech Briefs written by and published by . This book was released on 1983 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
