Status of understanding of the saturated-zone ground-water flow system at Yucca Mountain, Nevada, as of 1995

Luckey, Richard R.; Tucci, Patrick; Faunt, Claudia C.; Ervin, E.M.

doi:10.2172/437703

Cited by 31 publications

(74 citation statements)

References 124 publications

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“…The results also indicate that the Calico Hills Formation (Tac), which is a zeolitized tuff that functions as the Upper Volcanic Confining Unit (Luckey et al 1996, Figure 7), has a higher permeability than the Bullfrog Tuff (Tcb) and the Carbonate Aquifer. This paradoxical result may reflect the fact that, because it is unsaturated in the western half of Yucca Mountain, the Calico Hills Formation could be hydraulically tested only in the highly faulted eastern half of Yucca Mountain, whereas the other units were also tested in less intensely faulted areas to the west.…”

Section: The Imentioning

confidence: 90%

“…For instance, in cases in which the test interval was in the Prow Pass Tuff, with or without some portion of the adjacent bedded tuffs, the test results were grouped with other permeability estimates for the Prow Pass Tuff. If other units within the Middle Volcanic Aquifer (MVA), as defined by Luckey et al (1996, Figure 7), were also present in the test interval along with the Prow Pass Tuff, the test results were considered to represent the MVA. If hydrogeologic units other than those in the MVA were present in the test interval along with the Prow Pass Tuff, the permeability estimate for the test was grouped with the most general category, which is the mixed tuffs.…”

Section: Single-hole Testsmentioning

confidence: 99%

“…The Claim Canyon, Calico Hills, Shoshone Mountain fault zones (known collectively as the Northern Low Perm Zone), and the East-West barrier deserve additional comment because they form the Large Hydraulic Gradient Zone (Luckey et al 1996) north of Yucca Mountain. The East-West barrier was required to have a low permeability ( during the calibration in order to separate the high heads in the north with the lower heads in the vicinity of Yucca Mountain.…”

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confidence: 99%

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Calibration of the Site-Scale Saturated Zone Flow Model

Zyvoloski¹

2001

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Section: The Imentioning

confidence: 90%

Section: Single-hole Testsmentioning

confidence: 99%

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confidence: 99%

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Calibration of the Site-Scale Saturated Zone Flow Model

Zyvoloski¹

2001

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“…Many previous publications contain comprehensive site descriptions that have evolved during site investigation (DOE, 1995;Luckey et al, 1996;Flint et al, 1996;Scott and Bonk, 1984;Wilson et al, 1994;Winopd and Thordarson, 1975;Younker et al, 1992). The 1988 Site Characterization Plan (SCP) (DOE, 1988b) contains extensive background information for virtually all aspects of the geologic barrier subsystem.…”

Section: Data Sources and Previous Studiesmentioning

confidence: 99%

“…The saturated zone at Yucca Mountain is an unconfined aquifer that is part of the Alkali Flat-Furnace Creek groundwater basin which is part of the larger (47,000 km2) Death Valley groundwater flow system (Luckey et al, 1996). Groundwater flow fromYucca Mountain is generally to the south to southeast, which is why saturated zone modeling is often focused on a path in this direction relative to the repository.…”

Section: -8mentioning

confidence: 99%

Update to Assessment of Direct Disposal in Unsaturated Tuff of Spent Nuclear Fuel and High-Level Waste Owned by U.S. Department of Energy

Wheatley¹,

Rechard²

1998

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The overall purpose of this study is to provide information and ,@dance to the Office of Environmental Management of the U.S. Department of Energy (DOE) about the level of characterization necessary to dispose of DOE-owned spent nuclear fuel (SNF). The disposd option modeled was codisposal of DOE SNF with defense high-level waste (DHLN). A specific goal was to demonstrate the influence of DOE SNF, expected to be minor, in a predominately commercial repository using modeling conditions similar to those currently assumed by the Yucca Mountain Project (YMP). A performance assessment (PA) was chosen as the method of analysis. The performance metric for this analysis (referred to as the 1997 PA) was dose to an individual; the time period of interest was 100,000 yr. Results indicated that cumulative releases of "Tc and 237Np (primary contributors to human dose) fiom commercial SNF exceed those of DOE SNF both on a per MTHM and per package basis. Thus, if commercial SNF can meet regulatory performance criteria for dose to an individual, then the DOE SM; can also meet the criteria. This result is due in large part to lower burnup of the DOE SNF (less time for irradiation) and to the DOE SNF's small percentage of the total activity (1.5%) and mass (3.8%) of waste in the potential repository. Consistent-with the analyses performed for the YMP, the 1997 PA assumed all cladding as failed, which also contributed to the relatively poor performance of commercial SNF compared to DOE SNF.September 30, 1998 i .. PrefaceThis study, the 1997 performance assessment (1997 PA), evaluates whether spent nuclear fuel (SNF) owned by the Office of Environmental Management of the U. S. Department of Energy (DOE) performs noticeably better (or worse) than commercial SNF, and identifies important parameters that influence this performance after disposal. The latter results, in particular, are intended to help define appropriate requirements for waste characterization with regard to DOE-owned SNF being accepted for disposal. The study is part of a broader DOE program, the National Spent Nuclear Fuel Program, for developing a safe, cost-effective technical strategy for the interim management and ultimate disposition of the foreign and domestic spent nuclear fuel under the DOE'S jurisdiction. The DOE-owned SNF is currently stored at three primary sites (Idaho National Engineering and Environmental Laboratory [INEEL], the Hanford reservation, and the Savannah River plant) and several secondary DOE sites. The SNF originated in experimental, defense, and foreign reactors. Organization of ReportThis report is a detailed account of the analysis design and results. The introductory chapter describes the analysis goals and approach, highlights some of the analysis decisions made during the assessment, and sets the stage for the data and concepts that are presented in later chapters. Chapter 2 provides information on the performance measures and assumptions made with regard to modeling style.The remaining chapters cover the tasks of performance...

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Modeling solute transport through saturated zone ground water at 10km scale: Example from the Yucca Mountain license application

Kelkar

Ding

Chu

et al. 2010

Journal of Contaminant Hydrology

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Status of understanding of the saturated-zone ground-water flow system at Yucca Mountain, Nevada, as of 1995

Abstract: Portions of this document may be illegible in electronic image products. Images are produced from the best available original document.

Cited by 31 publications

References 124 publications

Calibration of the Site-Scale Saturated Zone Flow Model

Calibration of the Site-Scale Saturated Zone Flow Model

Update to Assessment of Direct Disposal in Unsaturated Tuff of Spent Nuclear Fuel and High-Level Waste Owned by U.S. Department of Energy

Modeling solute transport through saturated zone ground water at 10km scale: Example from the Yucca Mountain license application

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