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in creator/contributor: "Pawloski, G. A."  
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Radionuclide Decay and In-growth Technical Basis Document

Description: The purpose of this report is to assess the decay and in-growth of radionuclides from the radionuclide source term (RST) deposited by underground nuclear weapons tests conducted at the NTS from 1951 through 1992. A priority of the Underground Test Area (UGTA) project, administered by the Environmental Restoration Division of NNSA/NV, was to determine as accurately as possible a measure of the total radionuclide inventory for calculation of the RST deposited in the subsurface at the Nevada Test … more
Date: July 1, 2003
Creator: Kersting, A. B.; Finnegan, D. L.; Tompson, A. F. B.; Esser, B. K.; Smith, D. K.; Zavarin, M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydrologic Resources Management Program and Underground Test Area Project FY 2001-2002 Progress Report

Description: This report contains highlights of FY 2001 and 2002 technical studies conducted by the Analytical and Nuclear Chemistry Division (ANCD) at Lawrence Livermore National Laboratory (LLNL) in support of the Hydrologic Resources Management Program (HRMP) and the Underground Test Area (UGTA) Project. These programs are administered by the U.S. Department of Energy, National Nuclear Security Administration, Nevada Site Office (NNSA/NSO) through the Defense Programs and Environmental Restoration Divisi… more
Date: August 15, 2003
Creator: Rose, T. P.; Kersting, A. B.; Harris, L. J.; Hudson, G. B.; Smith, D. K.; Williams, R. W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of the Hydrologic Source Term from Underground Nuclear Tests on Pahute Mesa at the Nevada Test Site: The CHESHIRE Test

Description: The objectives of this report are to develop, summarize, and interpret a series of detailed unclassified simulations that forecast the nature and extent of radionuclide release and near-field migration in groundwater away from the CHESHIRE underground nuclear test at Pahute Mesa at the NTS over 1000 yrs. Collectively, these results are called the CHESHIRE Hydrologic Source Term (HST). The CHESHIRE underground nuclear test was one of 76 underground nuclear tests that were fired below or within 1… more
Date: May 1, 2001
Creator: Pawloski, G. A.; Tompson, A. F. B.; Carle, S. F.; Bourcier, W. L.; Bruton, C. J.; Daniels, J. I. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quantitative determination of minerals in Nevada Test Site samples by x-ray diffraction

Description: The external standard intensity ratio technique has been developed into a routine procedure for quantitatively determining mineralogic compositions of Nevada Test Site (NTS) samples by x-ray diffraction. This technique used ratios of x-ray intensity peaks from the same run which eliminates many possible errors. Constants have been determined for each of thirteen minerals commonly found in NTS samples - quartz, montmorillonite, illite, clinoptilolite, cristobalite, feldspars, calcite, dolomite, … more
Date: July 1, 1983
Creator: Pawloski, G.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Results from exploratory drill hole UE2ce, Northwest Yucca Flat, Nevada Test Site, near the NASH Event

Description: Exploratory drill hole UE2ce was drilled in January 1977 to determine geologic and geophysical characteristics of this site. This report presents geophysical logs, lithology, geologic structure, water table measurements, and physical properties for this drill hole. The data are then extrapolated to the NASH site, an event in U2ce, 55.6 m due north of UE2ce.
Date: March 3, 1982
Creator: Pawloski, G.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Continental scientific drilling program data base: 1982

Description: The Continental Scientific Drilling Program (CSDP) data base maintained at Lawrence Livermore National Laboratory is funded by the Office of Basic Energy Sciences of the Department of Energy. It is a central repository of information concerning approximately 1800 government funded and scientifically interesting drill holes in the United States. This data base can help reduce drilling costs and maximize scientific value of drilling efforts of government agencies and industry. The services of the… more
Date: May 18, 1982
Creator: Pawloski, G.A.; Howard, N.; Hage, G.; Higuera; M.L. & Richardson, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of Cavity Collapse and Surface Crater Formation for Selected Lawrence Livermore National Laboratory Underground Nuclear Tests - 2007

Description: This report describes evaluation of collapse evolution for selected LLNL underground nuclear tests at the Nevada Test Site (NTS). The work is being done at the request of NSTec and supports the Department of Energy National Nuclear Security Association Nevada Site Office Borehole Management Program (BMP). The primary objective of this program is to close (plug) weapons program legacy boreholes that are deemed no longer useful. Safety decisions must be made before a crater area, or potential cra… more
Date: April 26, 2007
Creator: Roberts, S. K.; Pawloski, G. A. & Raschke, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of the Transient Hydrologic Source Term for the Cambric Underground Nuclear Test at Frenchman Flat, Nevada test Site

Description: The objective of Phase II HST work is to develop a better understanding of the evolution of the HST for 1,000 years at the CAMBRIC underground nuclear test site in Frenchman Flat at the NTS. This work provides a better understanding of activities as they actually occurred, incorporates improvements based on recent data acquisition, and provides a basis to use the CAMBRIC site for model validation and monitoring activities as required by the UGTA Project. CAMBRIC was the only test in Frenchman F… more
Date: December 12, 2006
Creator: Carle, S. F.; Maxwell, R. M.; Pawloski, G. A.; Shumaker, D. E.; Tompson, A. B. & Zavarin, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Turning Points in Containment of Lawrence Livermore National Laboratory Underground Nuclear Tests

Description: Sometime in 1987 Billy Hudson, a long-time LLNL Containment Scientist and the Task Leader for Containment Diagnostics, put together a presentation entitled ''Turning Points in Containment''. This presentation identifies challenges, lessons learned, and changes made in containment practice over a 20-year period, from 1967-1987. Besides providing a significant historical summary, the presentation is valuable as we maintain a position of readiness 14 years after the last underground nuclear detona… more
Date: November 21, 2006
Creator: Hudson, B. C.; Rambo, J. T.; Pawloski, G. A. & Burkhard, N. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of Cavity Collapse and Surface Crater Formation for Selected Lawrence Livermore National Laboratory Underground Nuclear Tests - 2006

Description: This report describes evaluation of collapse evolution for selected LLNL underground nuclear tests at the Nevada Test Site (NTS). The work is being done at the request of Bechtel Nevada and supports the Department of Energy National Nuclear Security Association Nevada Site Office Borehole Management Program (BMP). The primary objective of this program is to close (plug) weapons program legacy boreholes that are deemed no longer useful. Safety decisions must be made before a crater area, or pote… more
Date: March 16, 2006
Creator: Pawloski, G. A. & Raschke, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of the Non-Transient Hydrologic Source Term from the CAMBRIC Underground Nuclear Test in Frenchman Flat, Nevada Test Site

Description: Hydrologic Source Term (HST) calculations completed in 1998 at the CAMBRIC underground nuclear test site were LLNL's first attempt to simulate a hydrologic source term at the NTS by linking groundwater flow and transport modeling with geochemical modeling (Tompson et al., 1999). Significant effort was applied to develop a framework that modeled in detail the flow regime and captured all appropriate chemical processes that occurred over time. However, portions of the calculations were simplified… more
Date: August 5, 2005
Creator: Tompson, A. B.; Maxwell, R. M.; Carle, S. F.; Zavarin, M.; Pawloski, G. A. & Shumaker, D. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simulating Effects of Non-Isothermal Flow on Reactive Transport of Radionuclides Originating from an Underground Nuclear Test

Description: Temperature can significantly affect radionuclide transport behavior. In simulation of radionuclide transport originating from an underground nuclear test, temperature effects from residual test heat include non-isothermal groundwater flow behavior (e.g. convection cells), increased dissolution rates of melt glass containing refractory radionuclides, changes in water chemistry, and, in turn, changes in radionuclide sorption behavior. The low-yield (0.75 kiloton) Cambric underground nuclear test… more
Date: March 6, 2006
Creator: Carle, S. F.; Zavarin, M.; Shumaker, D. E.; Tompson, A. B.; Maxwell, R. M. & Pawloski, G. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of Cavity Collapse and Surface Crater Formation for Selected Lawrence Livermore National Laboratory Tests - 2011

Description: This report evaluates collapse evolution for selected Lawrence Livermore National Laboratory (LLNL) underground nuclear tests at the Nevada National Security Site (NNSS, formerly called the Nevada Test Site). The work is being done at the request of National Security Technologies, LLC (NSTec) and supports the Department of Energy, National Nuclear Security Administration for the Nevada Site Office Borehole Management Program (BMP). The primary objective of this program is to close (plug) weapon… more
Date: February 28, 2011
Creator: Pawloski, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of Cavity Collapse and Surface Crater Formation for Selected Lawrence Livermore National Laboratory Underground Nuclear Tests - 2011, Part 2

Description: This report evaluates collapse evolution for selected Lawrence Livermore National Laboratory (LLNL) underground nuclear tests at the Nevada National Security Site (NNSS, formerly called the Nevada Test Site). The work is being done to support several different programs that desire access to the ground surface above expended underground nuclear tests. The programs include: the Borehole Management Program, the Environmental Restoration Program, and the National Center for Nuclear Security Gas-Mig… more
Date: January 30, 2012
Creator: Pawloski, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of Cavity Collapse and Surface Crater Formation for Selected Lawrence Livermore National Laboratory Underground Nuclear Tests - 2010

Description: This report evaluates collapse evolution for selected Lawrence Livermore National Laboratory (LLNL) underground nuclear tests at the Nevada National Security Site (NNSS, formerly called the Nevada Test Site). The work is being done at the request of Navarro-Interra LLC, and supports environmental restoration efforts by the Department of Energy, National Nuclear Security Administration for the Nevada Site Office. Safety decisions must be made before a surface crater area, or potential surface cr… more
Date: January 3, 2011
Creator: Pawloski, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of Cavity Collapse and Surface Crater Formation at the Norbo Underground Nuclear Test in U8c, Nevada Nuclear Security Site, and the Impact on Stability of the Ground Surface

Description: Lawrence Livermore National Laboratory (LLNL) Containment Program performed a review of nuclear test-related data for the Norbo underground nuclear test in U8c to assist in evaluating this legacy site as a test bed for application technologies for use in On-Site Inspections (OSI) under the Comprehensive Nuclear Test Ban Treaty. This request is similar to one made for the Salut site in U8c (Pawloski, 2012b). Review of the Norbo site is complicated because the test first exhibited subsurface coll… more
Date: June 18, 2012
Creator: Pawloski, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of Cavity Collapse and Surface Crater Formation at the Salut Underground Nuclear Test in U20ak, Nevada National Security Site, and the Impact of Stability of the Ground Surface

Description: At the request of Jerry Sweeney, the LLNL Containment Program performed a review of nuclear test-related data for the Salut underground nuclear test in U20ak to assist in evaluating this legacy site as a test bed for application technologies for use in On-Site Inspections (OSI) under the Comprehensive Nuclear Test Ban Treaty. Review of the Salut site is complicated because the test experienced a subsurface, rather than surface, collapse. Of particular interest is the stability of the ground sur… more
Date: April 25, 2012
Creator: Pawloski, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Phenomenological Models of Underground Nuclear Tests on Pahute Mesa, Nevada Test Site - BENHAM and TYBO

Description: Although it is well accepted that underground nuclear explosions modify the in situ geologic media around the explosion point, the details of these changes are neither well understood nor well documented. As part of the engineering and containment process before a nuclear test, the physical environment is characterized to some extent to predict how the explosion will interact with the in situ media. However, a more detailed characterization of the physical environment surrounding an expended si… more
Date: September 21, 1999
Creator: Pawloski, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermally Induced Groundwater Flow Resulting from an Underground Nuclear Test

Description: The authors examine the transient residual thermal signal resulting from an underground nuclear test (buried below the water table) and its potential to affect local groundwater flow and radionuclide migration in a saturated, fractured, volcanic aquifer system. Thermal profiles measured in a drillback hole between 154 days and 6.5 years after the test have been used to calibrate a non-isothermal model of fluid flow. In this process, they have estimated the magnitude and relative changes in perm… more
Date: December 16, 2000
Creator: Maxwell, R. M.; Tompson, A. F. B.; Rambo, J. T.; Carle, S. F. & Pawloski, G. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of the Hydrologic Source Term From Underground Nuclear Tests in Frenchman Flat at the Nevada Test Site: The Cambric Test

Description: The objectives of this project are to develop and apply a modeling frame- work to quantitatively evaluate the nature and extent of radionuclide migration within the immediate, near field environment about an underground nuclear test. Specifically, it will involve evaluation of ² The speciation and abundance of radionuclides that are introduced into groundwater as aqueous species or colloids, and ² The rate and extent of radionuclide movement, dilution, and reaction in groundwater surrounding th… more
Date: March 23, 1999
Creator: Bourcier, W. L.; Bruton, C. J.; Carle, S. F.; Kersting, A. B.; Pawloski, G. A.; Rard, J. A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simulation of Radionuclide Migration in Groundwater away from an Underground Nuclear Test

Description: Reactive transport simulations are being used to evaluate the nature and extent of radionuclide contamination within alluvium surrounding an underground nuclear test at the Nevada Test Site (NTS). Simulations are focused on determining the abundance and chemical nature of radionuclides that are introduced into groundwater, as well as the rate and extent of radionuclide migration and reaction in groundwater surrounding the working point of the test. Transport simulations based upon a streamline-… more
Date: December 13, 1999
Creator: Bruton, C. J.; Bourcier, W. L.; Shumaker, D. E.; Kersting, A. B.; Smith, D. K.; Carle, S. F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A preliminary guidebook for identifying stratigraphic contacts at the Nevada Test Site

Description: Lithologic variation, regional depositional trends, and the lack of written guidelines have resulted in inconsistencies in the recognition of stratigraphic contacts in drill holes at the Nevada Test Site (NTS). Stratigraphic identification, based on mineralogy of discrete samples, can be augmented by geophysical logs and downhole movies to more accurately and consistently locate contacts between units. Criteria are established for locating the base of the Pahute Mesa ash-flow tuff, the top of t… more
Date: January 1, 1992
Creator: Pawloski, G. A.; McKague, H. L.; Wagoner, J. L. & McKinnis, W.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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