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7,000 Matching Results
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Reactivity in the South Spoils and Hillside Dump at the Midnite Mine
The Midnite Mine is an inactive open-pit uranium mine located on the Spokane Indian Reservation in Washington State. Drill samples from two large waste rock dumps on the site, known as South Spoils and Hillside Dump, were collected with a Becker hammer drill and evaluated to determine potential of the rock to generate acid mine drainage (AMD). Waste rock at this mine contains both pyrite and uranium, and AMD effects are more complicated on this site than most in that uranium is soluble in both acidic and neutral aqueous solutions. Although AMD protocols identified 26% of the South Spoils samples as potentially acid, under 7% of the spoil samples were actually producing acid. Considerable calcite exists in the South Spoils, and weathering feldspars further contribute to acid neutralization. The Hillside Dump has low concentrations of pyrite and calcite that acid-base accounting protocols would predict to be non-acidic. Accumulation of sulfate in rocks with concentrations of less than 0.3% S causes some of those normally non-acid producing rocks to produce acid in the Hillside Dump.
Date:
1996
Creator:
Moore, Bruce W.; Price, Jesse W. & Gardner, Ted
System:
The UNT Digital Library
Groundwater screening evaluation/monitoring plan: 200 Area Treated Effluent Disposal Facility (Project W-049H). Revision 1
This report consists of the groundwater screening evaluation required by Section S.8 of the State Waste Discharge Permit for the 200 Area TEDF. Chapter 1.0 describes the purpose of the groundwater monitoring plan. The information in Chapter 2.0 establishes a water quality baseline for the facility and is the groundwater screening evaluation. The following information is included in Chapter 2.0: Facility description;Well locations, construction, and development data; Geologic and hydrologic description of the site and affected area; Ambient groundwater quality and current use; Water balance information; Hydrologic parameters; Potentiometric map, hydraulic gradients, and flow velocities; Results of infiltration and hydraulic tests; Groundwater and soils chemistry sampling and analysis data; Statistical evaluation of groundwater background data; and Projected effects of facility operation on groundwater flow and water quality. Chapter 3.0 defines, based on the information in Chapter 2.0, how effects of the TEDF on the environment will be evaluated and how compliance with groundwater quality standards will be documented in accordance with the terms and conditions of the permit. Chapter 3.0 contains the following information: Media to be monitored; Wells proposed as the point of compliance in the uppermost aquifer; Basis for monitoring well network and evidence of monitoring adequacy; Contingency …
Date:
May 1, 1995
Creator:
Barnett, D. B.; Davis, J. D.; Collard, L. B.; Freeman, P. B. & Chou, C. J.
System:
The UNT Digital Library
Torsion Testing of Plutonium
Results of torsion tests to determine the shear properties of plutonium are presented. Data on torsion properties are tabulated. (J.R.D.)
Date:
October 21, 1960
Creator:
Gardner, H. R.
System:
The UNT Digital Library
Characterization of Vadose Zone Sediments Below the T Tank Farm: Boreholes C4104, C4105, 299-W10-196 and RCRA Borehole 299-W11-39
This report contains geologic, geochemical, and physical characterization data collected on sediment recovered from boreholes C4104 and C4105 in the T Tank Farm, and 299-W-11-39 installed northeast of the T Tank Farm. The measurements on sediments from borehole C4104 are compared to a nearby borehole 299-W10-196 placed through the plume from the 1973 T-106 tank leak. This report also presents the data in the context of sediment types, the vertical extent of contamination, the migration potential of the contaminants, and the likely source of the contamination in the vadose zone and groundwater below the T Tank Farm. Sediment samples were characterized for: moisture content, gamma-emission radionuclides, one-to-one water extracts (which provide soil pH, electrical conductivity, cation, trace metal, radionuclide and anion data), total carbon and inorganic carbon content, and 8 M nitric acid extracts (which provide a measure of the total leachable sediment content of contaminants). Overall, our analyses showed that common ion exchange is a key mechanism that influences the distribution of contaminants within that portion of the vadose zone affected by tank liquor. We observed slight elevated pH values in samples from borehole C4104. The sediments from the three boreholes, C4104, C4105, and 299-W10-196 do show that sodium-, …
Date:
September 1, 2004
Creator:
Serne, R JEFFREY.; Bjornstad, Bruce N.; Horton, Duane G.; Lanigan, David C.; Lindenmeier, Clark W.; Lindberg, Michael J. et al.
System:
The UNT Digital Library
Characterization of Vadose Zone Sediments Below the T Tank Farm: Boreholes C4104, C4105, 299-W10-196, and RCRA Borehole 299-W11-39
This report was revised in September 2008 to remove acid-extractable sodium data from Tables 4.8, 4.28, and 4.52. The sodium data was removed due to potential contamination introduced during the acid extraction process. The rest of the text remains unchanged from the original report issued in September 2004. The overall goal of the Tank Farm Vadose Zone Project, led by CH2M HILL Hanford Group, Inc., is to define risks from past and future single-shell tank farm activities at Hanford. To meet this goal, CH2M HILL Hanford Group, Inc. tasked scientists from Pacific Northwest National Laboratory to perform detailed analyses on vadose zone sediments from within Waste Management Area (WMA) T-TX-TY. This report is the second of two reports written to present the results of these analyses. Specifically, this report contains all the geologic, geochemical, and selected physical characterization data collected on vadose zone sediment recovered from boreholes C4104 and C4105 in the T Tank Farm, and from borehole 299-W-11-39 installed northeast of the T Tank Farm. Finally, the measurements on sediments from borehole C4104 are compared with a nearby borehole drilled in 1993, 299- W10-196, through the tank T-106 leak plume.
Date:
September 11, 2008
Creator:
Serne, R. Jeffrey; Bjornstad, Bruce N.; Horton, Duane G.; Lanigan, David C.; Schaef, Herbert T.; Lindenmeier, Clark W. et al.
System:
The UNT Digital Library
An Algebraic Approach to the Evolution of Emittances upon Crossing the Linear Coupling Difference Resonance
One of the hallmarks of linear coupling is the resonant exchange of oscillation amplitude between the horizontal and vertical planes when the difference between the unperturbed tunes is close to an integer. The standard derivation of this phenomenon (known as the difference resonance) can be found, for example, in the classic papers of Guignard [1, 2]. One starts with an uncoupled lattice and adds a linear perturbation that couples the two planes. The equations of motion are expressed in hamiltonian form. As the difference between the unperturbed tunes approaches an integer, one finds that the perturbing terms in the hamiltonian can be divided into terms that oscillate slowly and ones that oscillate rapidly. The rapidly oscillating terms are discarded or transformed to higher order with an appropriate canonical transformation. The resulting approximate hamiltonian gives equations of motion that clearly exhibit the exchange of oscillation amplitude between the two planes. If, instead of the hamiltonian, one is given the four-by-four matrix for one turn around a synchrotron, then one has the complete solution for the turn-by-turn (TBT) motion. However, the conditions for the phenomenon of amplitude exchange are not obvious from a casual inspection of the matrix. These conditions and those …
Date:
September 1, 2008
Creator:
Gardner,C.
System:
The UNT Digital Library
Charm production physics from Fermilab fixed-target experiments
Recent analyses of charm quark production mechanisms from Fermilab fixed-target experiments are summarized. Measurements of single inclusive differential cross sections for hadroproduced and photoproduced D mesons are compared to next-to-leading order QCD calculations. New data from hadroproduction and previous photoproduction measurements of charm meson pair correlations are compared to NLO calculations and also to parton shower Monte Carlo models. Nonperturbative effects, such as intrinsic k{sub t} and fragmentation, are seen to play an important role in most of these comparisons. Results on charm production asymmetries in both hadroproduction and photoproduction are summarized.
Date:
May 1, 1995
Creator:
Gardner, R.
System:
The UNT Digital Library
7th International Workshop on the Identification of Transcribed Sequences. Beyond the Identification of Transcribed Sequences
The Seventh Annual Human Genome Conference: Beyond the Identification of Transcribed Sequences (BITS) was held November 16-19, 1997 at the Asilomar Conference Center in Monterey, California. The format for the meeting was a combination of oral presentations, group discussions and poster sessions. The original workshop was held to discuss methodologies for the identification of transcribed sequences in mammalian genomes. Over the years, the focus of the workshops has gradually shifted towards functional analysis, with the most dramatic change in emphasis at this meeting, as reflected in the modest change in the workshop title. Topics presented and discussed included: (1) large scale expression and mutational analysis in yeast, C. elegans, Drosophila and zebrafish, (2) comparative mapping of zebrafish, chicken and Fugu; (3) functional analysis in mouse using promoter traps, mutational analysis of biochemical pathways, and Cre/lox constructs; (4) construction of 5 foot end and complete cDNA libraries; (5) expression analysis in mammalian organisms by array screening and differential display; (6) genome organization as determined by detailed transcriptional mapping and genomic sequence analysis; (7) analysis of genomic sequence, including gene and regulatory sequence predictions, annotation of genomic sequence, development of expression databases and verification of sequence analysis predictions; and (8) structural/functional relationships …
Date:
November 19, 1997
Creator:
Gardner, Kathleen
System:
The UNT Digital Library
Underprivileged Students and Institutions of Higher Education; Selected References
This report consists of selected references regarding the topic of underprivileged students and institutions of higher education.
Date:
February 28, 1969
Creator:
Gardner, Mindi
System:
The UNT Digital Library
Injection of large transverse emittance EBIS beams in booster
During the commissioning of EBIS beams in Booster in November 2010 and in April, May and June 2011, it was found that the transverse emittances of the EBIS beams just upstream of Booster were much larger than expected. Beam emittances of 11{pi} mm milliradians had been expected, but numbers 3 to 4 times larger were measured. Here and throughout this note the beam emittance, {pi}{epsilon}{sub 0}, is taken to be the area of the smallest ellipse that contains 95% of the beam. We call this smallest ellipse the beam ellipse. If the beam distribution is gaussian, the rms emittance of the distribution is very nearly one sixth the area of the beam ellipse. The normalized rms emittance is the rms emittance times the relativistic factor {beta}{gamma} = 0.06564. This amounts to 0.12{pi} mm milliradians for the 11{pi} mm milliradian beam ellipse. In [1] we modeled the injection and turn-by-turn evolution of an 11{pi} mm milliradian beam ellipse in the horizontal plane in Booster. It was shown that with the present injection system, up to 4 turns of this beam could be injected and stored in Booster without loss. In the present note we extend this analysis to the injection of …
Date:
October 10, 2011
Creator:
Gardner, C.
System:
The UNT Digital Library
A MACRO GRAIN SIZE TECHNIQUE FOR URANIUM
None
Date:
February 1, 1956
Creator:
Gardner, H.R.
System:
The UNT Digital Library
Studies of Charged Particle Distributions in an Electrostatic Confinement System. Progress Report, 1 November 1971--31 January 1976
Microwave cavity techniques were used to measure electron density in a spherical, inertial-electrostatic confinement device using six ion guns. The density was roughly proportional to ion current (1 to 17 mA) and decreased somewhat with increasing ion energy (10 to 37 keV). With D$sub 2$ pressure decrease from 10 to 3 mTorr, n/sub e/ decreased faster than linearly and below approximately 3 mTorr decreased linearly with pressure down to the lowest pressure of 0.4 mTorr. At 1 mTorr and 10 mA, measurements (with poor spatial resolution) were consistent with 10$sup 10$ total electrons and a central n/sub e/ of 10$sup 9$ electrons/cm$sup 3$. Neutron flux (at 50 keV) was about one sixth that of Hirsch (J. Appl. Phys. 38, 4522 (1967)). Six- vs. three-gun operation showed a small enhancement of both n/sub e/ and neutron flux that may indicate some particle trapping.
Date:
January 1, 1976
Creator:
Gardner, A. L.
System:
The UNT Digital Library
Particle Trajectories in Homogeneous Magnetic Field with Linear Time Dependence
Abstract: "Formulas are derived for the trajectory of a charged particle in a magnetic field which is a linear function of time. Graphs of certain functions are presented, by means of which a trajectory with given initial position and velocity may be plotted."
Date:
August 9, 1955
Creator:
Gardner, Clifford S.
System:
The UNT Digital Library
Recess Appointments Made by President George W. Bush
None
Date:
April 15, 2009
Creator:
unknown
System:
The UNT Digital Library
Neutron reactions on $sup 239$U
None
Date:
April 24, 1975
Creator:
Gardner, D. G.
System:
The UNT Digital Library
GRAIN REFINEMENT PRODUCED BY AN ALPHA PHASE ANNEAL OF BETA PHASE HEAT TREATED AND WATER QUENCHED URANIUM
During an experiment involving alpha phase annealing (at 610 to 655 deg C for 5 and 10 min) of beta-quenched uranium, it was determined that the relatively coarse, irregular shaped grains (0.08 to 0.150 mm in diameter) in the beta-quenched structure, were replaced by fine equiaxed grains (0.04 to 0.09 mm in diameter). (auth)
Date:
January 1, 1955
Creator:
Gardner, H.R.
System:
The UNT Digital Library
Preliminary report on the tensile properties of plutonium
Preliminary data have been obtained on the effect of temperature on the tensile properties of a Pu-0.9 w/o Ga delta stabilized alloy. Contoured castings for tensile specimen fabrication were obtained by pouring in vacuo from 900 {degrees}C into a MgO coated graphite mold heated to 475-500 {degrees}C.
Date:
March 8, 1962
Creator:
Gardner, H. R.
System:
The UNT Digital Library
FY11 Report on Metagenome Analysis using Pathogen Marker Libraries
None
Date:
June 2, 2011
Creator:
Gardner, S.; Allen, J.; McLoughlin, K. & Slezak, T.
System:
The UNT Digital Library
Analysis of Fragmentation and Resulting Shrapnel Penetration of Naturally Fragmenting Cylindrical Bombs
Fragmentation of exploding cylinders and penetration mechanics of surrounding vessel walls were examined and a qualitative understanding was achieved. This understanding provided a basis for making simplifying approximations and assumptions that aided in creating a shrapnel penetration model. Several mathematical models were discussed, and results from 6 cylinder tests were analyzed in order to select a model that best represented the data. It was determined that the overall best mathematical model to predict shrapnel penetration uses the modified Gurney equation to calculate fragment velocity, the Mott equation to calculate largest fragment weight, and the Christman/Gehring equation to calculate penetration depth.
Date:
August 1, 2000
Creator:
Gardner, S. E.
System:
The UNT Digital Library
Diagnostic Measurements of a Highly Ionized, Steady-state Plasma
This paper is primarily intended to give an account of a few of the diagnostic techniques that have been applied to a highly ionized, steady-state helium plasma at the Lawrence Radiation Laboratory. However, to establish a proper perspective it will first be well to describe briefly the system in which the plasma is generated and studied.
Date:
1960
Creator:
Gardner, Andrew L.
System:
The UNT Digital Library
Preliminary Results on the Kinetic Behavior of Water Boiler Reactors
None
Date:
April 15, 1957
Creator:
Hetrick, D. L.; Flora, J. W.; Gardner, E. L.; Moskowitz, B. R.; Muller, D. R.; Remley, M. E. et al.
System:
The UNT Digital Library
Mollusca From the Miocene and Lower Pliocene of Virginia and North Carolina: Part 1. Pelecypoda
Abstract: A brief sketch of the stratigraphy of the Miocene of Virginia and the Miocene and Pliocene of North Carolina was prepared by Dr. W. C. Mansfield before his death in July 1939. His purpose was "to provide a background of formational nomenclature" for the taxonomic treatment of the molluscan faunas. The physical nature and distribution of the upper Tertiary formations within those States are discussed, characteristic sections given, and diagnostic molluscan species listed. Part 1 of the systematic report covers the Pelecypoda. A monographic treatment is not attempted, but 132 previously known species are considered, and 62 new species and subspecies are described and figured.
Date:
1943
Creator:
Gardner, Julia Anna
System:
The UNT Digital Library
Scientific drilling in the Valles caldera magma-hydrothermal system, New Mexico
None
Date:
April 1, 1994
Creator:
Goff, F.; Gardner, J. N.; Heiken, G. & Hulen, J. B.
System:
The UNT Digital Library
Reservoir enhancement on the impermeable margins of productive geothermal fields
This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos national Laboratory (LANL). The overall goal of the project was to evaluate the performance of Los Alamos technology in selected geothermal fields, to adapt the technology to the existing industry infrastructure where necessary, and to facilitate its application through demonstration and communication. The primary specific objective was to identify, collaborate, and partner with geothermal energy- producing companies in an evaluation of the application of Los Alamos microseismic mapping technology for locating fracture permeability in producing geothermal fields.
Date:
January 1, 1997
Creator:
Goff, S.; Gardner, J.; Dreesen, D. & Whitney, E.
System:
The UNT Digital Library