Chemistry of diagenetically altered tuffs at a potential nuclear waste repository, Yucca Mountain, Nye County, Nevada

Broxton, D.E.; Warren, R.W.; Hagan, R.C.; Luedemann, Gary

doi:10.2172/59981

Cited by 28 publications

(44 citation statements)

References 9 publications

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“…Other boreholes, where data is sufficient, show that CaO generally decreases with increasing depth. This relation has been noted by Broxton, et al (1986) and Szymanski (1 992 Calcic rich clinoptilolites occur at depth in boreholes USW G-4, UE-25 a&b#l , UE-25 p#l and J-13 in the southeastern portions of Yucca Mountain..…”

Section: Deep Calcium Rich Clinopfiloljfesupporting

confidence: 63%

“…In this report we examine the spatial distribution of the various types of chemical alteration indicated by the data reported in Broxton, et al (1986) in order to evaluate the location, spatial character and extent of the alteration with the hope of shedding light on the origin of the altering fluids and to test the hypogene hypothesis of Szymanski (1992). In this regard, it is of prime importance is to evaluate whether the metasomatic alteration reflects supergene or, conversely, hypogene processes.…”

Section: Purposementioning

confidence: 99%

“…The data are that given in Appendix F of Broxton, et al (1986). The samples were collected from ten boreholes and one surface location at Yucca Mountain.…”

Section: Diversity Within Boreholes and At Surface Locationsmentioning

confidence: 99%

See 2 more Smart Citations

Dialogs on the Yucca Mountain controversy. Special report No. 5

Archambeau¹,

Szymanski²

1993

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Section: Deep Calcium Rich Clinopfiloljfesupporting

confidence: 63%

Section: Purposementioning

confidence: 99%

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Dialogs on the Yucca Mountain controversy. Special report No. 5

Archambeau¹,

Szymanski²

1993

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“…The phosphate in the rocks is apparently redistributed locally by groundwater, resulting in the precipitation of uranyl phosphate minerals within the zone of weathering (Snelling 1980). This retardation mechanism is not expected to be important at Yucca Mountain, given the low phosphate concentrations found in Yucca Mountain rock units (Broxton et al 1986). …”

Section: Uraniummentioning

confidence: 98%

Unsaturated Zone and Saturated Zone Transport Properties (U0100)

Conca¹

2000

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“…Groundmass texture (crystals <4 mm) comprises the bulk of the formation and has a composition that includes a range of 76 to 78 wt% Si02 with A1203 next in abundance at just under 12 to 13 wt% and other minerals as shown in Table 4-6. The values in Table 4-6 are from an analysis of samples from USW G-4 (Broxton et al, 1986) from a vitric unit with a composition that was representative of the majority of units in the well. The values in Table 4-6 are similar to those shown in the SCP (DOE, 1988b, Table 1-5, p. 1-69), which gives a breakdown of composition by subunits (lower nonlithophysal, etc.).…”

Section: Geochemistrymentioning

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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Chemistry of diagenetically altered tuffs at a potential nuclear waste repository, Yucca Mountain, Nye County, Nevada

Cited by 28 publications

References 9 publications

Dialogs on the Yucca Mountain controversy. Special report No. 5

Dialogs on the Yucca Mountain controversy. Special report No. 5

Unsaturated Zone and Saturated Zone Transport Properties (U0100)

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

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