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5
Veterans Affairs: “Gray Area Retirees”— Issues and Related Legislation
None
Date:
September 10, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Proliferation Security Initiative (PSI)
None
Date:
September 10, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Uncertainty and Sensitivity of Contaminant Travel Times from the Upgradient Nevada Test Site to the Yucca Mountain Area
Yucca Mountain (YM), Nevada, has been proposed by the U.S. Department of Energy as the nation’s first permanent geologic repository for spent nuclear fuel and highlevel radioactive waste. In this study, the potential for groundwater advective pathways from underground nuclear testing areas on the Nevada Test Site (NTS) to intercept the subsurface of the proposed land withdrawal area for the repository is investigated. The timeframe for advective travel and its uncertainty for possible radionuclide movement along these flow pathways is estimated as a result of effective-porosity value uncertainty for the hydrogeologic units (HGUs) along the flow paths. Furthermore, sensitivity analysis is conducted to determine the most influential HGUs on the advective radionuclide travel times from the NTS to the YM area. Groundwater pathways are obtained using the particle tracking package MODPATH and flow results from the Death Valley regional groundwater flow system (DVRFS) model developed by the U.S. Geological Survey (USGS). Effectiveporosity values for HGUs along these pathways are one of several parameters that determine possible radionuclide travel times between the NTS and proposed YM withdrawal areas. Values and uncertainties of HGU porosities are quantified through evaluation of existing site effective-porosity data and expert professional judgment and are incorporated in …
Date:
September 10, 2009
Creator:
Zhu, J.; Pohlmann, K.; Chapman, J.; Russell, C.; Carroll, R.W.H. & Shafer, D.
Object Type:
Report
System:
The UNT Digital Library
The New Stamford American (Stamford, Tex.), Vol. 1, No. 15, Ed. 1 Thursday, September 10, 2009
Weekly newspaper from Stamford, Texas that includes local, state, and national news along with advertising.
Date:
September 10, 2009
Creator:
Russell, William
Object Type:
Newspaper
System:
The Portal to Texas History
The Altus Times (Altus, Okla.), Vol. 111, No. 306, Ed. 1 Thursday, September 10, 2009
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 10, 2009
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History