Robert Andrews - US Nuclear Waste Technical Review Board

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Site-Scale Groundwater Flow Model • Regional model allows definition of general flow directions and provides contraints on volumetric flow rates through aquifers • Site-scale model provides greater detail of flow directions and flow rates through different hydrogeologic units of relevance to repository performance • Site-scale model builds on observations of hydraulic heads and permeability in DOE and Nye County boreholes and discrete large scale aquifer tests conducted in the C-wells complex and the Alluvial Testing Complex 00414PR_SZ_NRC_<strong>Andrews</strong>.ppt 24
Boreholes used in the Development of the Site-Scale Groundwater Flow Model • DOE and Nye County boreholes used to develop parameters and measure hydraulic head • Borehole coverage significantly expanded by Nye County-DOE cooperative drilling program (especially in alluvium and in vicinity of alluvium-tuff contact) 00414PR_SZ_NRC_<strong>Andrews</strong>.ppt 25
Page 1 and 2: U.S. Department of Energy Office of
Page 3 and 4: Components Affecting Technical Basi
Page 5 and 6: Introduction - Performance Assessme
Page 7 and 8: Conceptual Framework for Saturated
Page 9 and 10: Major Physiographic Features of Dea
Page 11 and 12: Cumulative Recharge Estimates in De
Page 13 and 14: Discharge Locations in Death Valley
Page 15 and 16: Groundwater Withdrawals in the Deat
Page 17 and 18: Potentiometric Surface of Death Val
Page 19 and 20: Geochemistry Signatures and Inferre
Page 21 and 22: Regional Variation in Uranium and U
Page 23: Comparison of Inferred and Simulate
Page 27 and 28: Site Scale Geologic Representation
Page 29 and 30: Extent of Alluvium Identified in Ny
Page 31 and 32: Site Scale Boundary Fluxes Compared
Page 33 and 34: C-Wells Stratigraphy and Hydraulic
Page 35 and 36: Site Scale Modeled and Observed Pot
Page 37 and 38: Calculated Site Scale Groundwater F
Page 39 and 40: UTM Northing (m) 4090000 4085000 40
Page 41 and 42: Site Scale Radionuclide Transport
Page 43 and 44: Matrix Diffusion Coefficient Evalua
Page 45 and 46: Single Hole Tracer Test at Alluvial
Page 47 and 48: Carbon-14 versus Delta Carbon-13
Page 49 and 50: Sorption of Radionuclides on Alluvi
Page 51 and 52: Calculated Radionuclide Breakthroug
Page 53 and 54: Calculated Radionuclide Breakthroug
Page 55 and 56: Comparison to Alternative Represent
Page 57 and 58: NRC/CNWRA Transport Model Results
Page 59 and 60: Summary and Conclusions - Radionucl

Robert Andrews - US Nuclear Waste Technical Review Board

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