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Drift-Scale Radionuclide Transport

Description: The purpose of this model report is to document the drift scale radionuclide transport model, taking into account the effects of emplacement drifts on flow and transport in the vicinity of the drift, which are not captured in the mountain-scale unsaturated zone (UZ) flow and transport models ''UZ Flow Models and Submodels'' (BSC 2004 [DIRS 169861]), ''Radionuclide Transport Models Under Ambient Conditions'' (BSC 2004 [DIRS 164500]), and ''Particle Tracking Model and Abstraction of Transport Pro… more
Date: September 22, 2004
Creator: Houseworth, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Features, Events, and Processes in UZ Flow and Transport

Description: Unsaturated zone (UZ) flow and radionuclide transport is a component of the natural barriers that affects potential repository performance. The total system performance assessment (TSPA) model, and underlying process models, of this natural barrier component capture some, but not all, of the associated features, events, and processes (FEPs) as identified in the FEPs Database (Freeze, et al. 2001 [154365]). This analysis and model report (AMR) discusses all FEPs identified as associated with UZ … more
Date: April 10, 2001
Creator: Houseworth, J.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of Exploratory Studies Facility construction water on radionuclide release

Description: ESF is a planned underground laboratory to conduct subsurface explortion and testing in support of site suitability determination and license application for a potential high-level nuclear waste repository at Yucca Mountain. ESF design includes a 7.6 m dia, 7.8 km long tunnel loop of two main access ramps from the surface down to a main drift along the conceptual repository horizon in a fractured, welded tuff (Topopah Spring member of Paintbrush Tuff). The use of water during excavation of the … more
Date: August 1, 1996
Creator: Houseworth, J.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sensitivity Analysis of Hydrological Parameters in Modeling Flow and Transport in the Unsaturated Zone of Yucca Mountain

Description: The unsaturated fractured volcanic deposits at Yucca Mountain have been intensively investigated as a possible repository site for storing high-level radioactive waste. Field studies at the site have revealed that there exist large variabilities in hydrological parameters over the spatial domain of the mountain. This paper reports on a systematic analysis of hydrological parameters using the site-scale 3-D unsaturated zone (UZ) flow model. The objectives of the sensitivity analyses are to evalu… more
Date: March 21, 2006
Creator: Zhang, K.; Wu, Y.S. & Houseworth, J.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Response to"Analysis of the Treatment, by the U.S. Department of Energy, of the FEP Hydrothermal Activity in the Yucca Mountain Performance Assessment" by Yuri Dublyansky

Description: This paper presents a rebuttal to Dublyansky (2007), which misrepresents technical issues associated with hydrothermal activity at the proposed Yucca Mountain nuclear waste repository and their importance to the long-term performance of the repository. In this paper, questions associated with hydrothermal activity are reviewed and the justification for exclusion of hydrothermal activity from performance assessment is presented. The hypothesis that hydrothermal upwelling into the present-day uns… more
Date: November 17, 2008
Creator: Houseworth, J.E. & Hardin, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A quasilinear model for solute transport under unsaturated flow

Description: We developed an analytical solution for solute transport under steady-state, two-dimensional, unsaturated flow and transport conditions for the investigation of high-level radioactive waste disposal. The two-dimensional, unsaturated flow problem is treated using the quasilinear flow method for a system with homogeneous material properties. Dispersion is modeled as isotropic and is proportional to the effective hydraulic conductivity. This leads to a quasilinear form for the transport problem in… more
Date: May 15, 2009
Creator: Houseworth, J.E. & Leem, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Impact of Drill and Blast Excavation on Repository Performance Confirmation

Description: There has been considerable work accomplished internationally examining the effects of drill and blast excavation on rock masses surrounding emplacement openings of proposed nuclear waste repositories. However, there has been limited discussion tying the previous work to performance confirmation models such as those proposed for Yucca Mountain, Nevada. This paper addresses a possible approach to joining the available information on drill and blast excavation and performance confirmation. The me… more
Date: August 21, 2000
Creator: Keller, R.; Francis, N.; Houseworth, J. & Kramer, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Analytical Model for Solute Transport in Unsaturated Flowthrough a Single Fracture and Porous Rock Matrix

Description: Exact analytical solutions are presented for solute transport in an unsaturated fracture and porous rock matrix. The problem includes advective transport in the fracture and rock matrix as well as advective and diffusive fracture-matrix exchange. Linear sorption in the fracture and matrix and radioactive decay are also treated. The solution is for steady, uniform transport velocities within the fracture and matrix, but allows for independent specification of each of the velocities. The problem … more
Date: September 16, 2004
Creator: Houseworth, J.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Investigations of Near-Field Thermal-Hydrologic-Mechanical-Chemical Models for Radioactive Waste Disposal in Clay/Shale Rock

Description: Clay/shale has been considered as potential host rock for geological disposal of high-level radioactive waste throughout the world, because of its low permeability, low diffusion coefficient, high retention capacity for radionuclides, and capability to self-seal fractures. For example, Callovo-Oxfordian argillites at the Bure site, France (Fouche et al., 2004), Toarcian argillites at the Tournemire site, France (Patriarche et al., 2004), Opalinus Clay at the Mont Terri site, Switzerland (Meier … more
Date: June 20, 2011
Creator: Liu, H.H.; Li, L.; Zheng, L.; Houseworth, J.E. & Rutqvist, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Leakage Risk Assessment for a Potential CO2 Storage Project in Saskatchewan, Canada

Description: A CO{sub 2} sequestration project is being considered to (1) capture CO{sub 2} emissions from the Consumers Cooperative Refineries Limited at Regina, Saskatchewan and (2) geologically sequester the captured CO{sub 2} locally in a deep saline aquifer. This project is a collaboration of several industrial and governmental organizations, including the Petroleum Technology Research Centre (PTRC), Sustainable Development Technology Canada (SDTC), SaskEnvironment Go Green Fund, SaskPower, CCRL, Schlu… more
Date: May 1, 2011
Creator: Houseworth, J.E.; Oldenburg, C.M.; Mazzoldi, A.; Gupta, A.K.; Nicot, J.-P. & Bryant, S.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Features, Events and Processes for the Used Fuel Disposition Campaign

Description: The Used Fuel Disposition (UFD) Campaign within DOE-NE is evaluating storage and disposal options for a range of waste forms and a range of geologic environments. To assess the potential performance of conceptual repository designs for the combinations of waste form and geologic environment, a master set of Features, Events, and Processes (FEPs) has been developed and evaluated. These FEPs are based on prior lists developed by the Yucca Mountain Project (YMP) and the international repository co… more
Date: December 15, 2010
Creator: Blink, J. A.; Greenberg, H. R.; Caporuscio, F. A.; Houseworth, J. E.; Freeze, G. A.; Mariner, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Flow and transport in the drift shadow in a dual-continuum model

Description: The current concept for high-level radioactive waste disposal at Yucca Mountain is for the waste to be placed in underground tunnels (or drifts) in the middle of a thick unsaturated zone. Flow modeling and field testing have shown that not all flow encountering a drift will seep into the drift. The underlying reason for the diversion of unsaturated flow around a drift is that capillary forces in the fractures and matrix prevent water entry into the drift unless the capillary pressure in the roc… more
Date: September 1, 2002
Creator: Houseworth, J.E.; Finsterle, S. & Bodvarsson, G.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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