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The Sandia/Arzamas-16 Magazine-to-Magazine Remote Monitoring Field Trial Evaluation
Sandia National Laboratories and the Russian Federal Nuclear Center-All Russian Research Institute for Experimental Physics (VNIIEF) (also known as Arzamas-16) are collaborating on ways to assure the highest standards of safety, security, and international accountability of fissile material. For these collaborations, sensors and information technologies have been identified as important in reaching these standards in a cost-effective manner. Specifically, Sandia and VNIIEF have established a series of remote monitoring field trials to provide a mechanism for joint research and development on storage monitoring systems. These efforts consist of the ''Container-to-Container'', ''Magazine-to-Magazine'', and ''Facility-to-Facility'' field trials. This paper will describe the evaluation exercise Sandia and VNIIEF conducted on the Magazine-to-Magazine systems. Topics covered will include a description of the evaluation philosophy, how the various sensors and system features were tested, evaluation results, and lessons learned.
Date:
July 12, 1999
Creator:
Barkanov, Boris; Blagin, Sergei; Croessmann, Dennis; Damico, Joe; Ehle, Steve & Nilsen, Curt
Object Type:
Article
System:
The UNT Digital Library
Chemical Grouting Lost-Circulation Zones with Polyurethane Foam
Sandia National Laboratories is developing polyurethane foam as a chemical grout for lost circulation zones. In past work polyurethane foam was tried with limited success in laboratory tests and GDO sponsored field tests. Goals were that the foam expanded significantly and harden to a chillable firmness quickly. Since that earlier work there have been improvements in polyurethane chemistry and the causes of the failures of previous tests have been identified. Recent success in applying pure solution grouts (proper classification of polyurethane--Naudts) in boreholes encourages reevaluating its use to control lost circulation. These successes include conformance control in the oil patch (e.g. Ng) and darn remediation projects (Bruce et al.). In civil engineering, polyurethane is becoming the material of choice for sealing boreholes with large voids and high inflows, conditions associated with the worst lost circulation problems. Demonstration of a delivery mechanism is yet to be done in a geothermal borehole.
Date:
July 12, 1999
Creator:
Mansure, A. J. & Westmoreland, J. J.
Object Type:
Article
System:
The UNT Digital Library
An Investigation of Molecular Templating in Amorphous Silicas by Cross-Polarization NMR Spectroscopy
The precise pore sizes defined by crystalline zeolite lattices have led to intensive research on zeolite membranes. Unfortunately zeolites have proven to be extremely difficult to prepare in a defect-free thin film form needed for membrane flux and selectivity. We introduce tetrapropylammonium (TPA), a structure-directing agent for zeolite ZSM-5, into a silica sol and exploit the development of high solvation stresses to create templated amorphous silicas with pore apertures comparable in size to those of ZSM-5. Silicon and carbon NMR experiments were performed to evaluate the efficacy of our templating approach. The {sup 29}Si NMR spectrum of the silica matrix was observed by an intermolecular cross-polarization experiment involving the {sup 1}H nuclei of TPA and the {sup 29}Si nuclei in the silica matrix. The efficiency of the cross-polarization interaction was used to investigate the degree to which the matrix formed a tight cage surrounding the template molecule. Bulk xerogels, prepared by gelation and slow drying of the corresponding sols, exhibited only weak interactions between the two sets of nuclei. Thin film xerogels, where drying stresses are greater, exhibited significantly increased interactions. Intramolecular cross-polarization experiments between the {sup 1}H and {sup 13}C nuclei of the template molecule demonstrated that much of …
Date:
July 12, 1999
Creator:
Assink, R. A.; Brinker, C. J.; Click, C. A. & Naik, S. J.
Object Type:
Article
System:
The UNT Digital Library
Absorbance and Photoluminescence of Si, Ge, and MoS2 Nanoparticles Studied by Liquid Chromatography
The authors have successfully synthesized highly crystalline, size-selected indirect band-gap nanocrystals (NC) of Si, Ge and MoS{sub 2} in the size range 2-10 nm in inverse micelles and studied their optical absorption and photoluminescence (PL) properties using liquid chromatography. Room temperature, visible PL from these nanocrystals was demonstrated in the range 700-350 nm (1.8-3.5 eV). their experimental results are interpreted in terms of the corresponding electronic structure of the bulk materials and it is demonstrated that these nanocrystals retain bulk-like electronic character to sizes as small as 2 nm, but the absorbance energies are strongly blue-shifted by quantum confinement. The experimental results on Si-NCs are also compared to earlier work on Si clusters grown by other techniques and to the predictions of various model calculations. Currently, the wide variations in the theoretical predictions of the various models along with considerable uncertainties in experimental size determination for clusters less than 3-4 nm, make it difficult to select the best model.
Date:
July 12, 1999
Creator:
Provencio, P. P.; Samara, G. A. & Wilcoxon, J. P.
Object Type:
Article
System:
The UNT Digital Library
Fourier Transform Luminescence Spectroscopy of Semiconductor Thin Films and Devices
We have been successful in adapting Fourier transform (FT) Raman accessories and spectrophotometers for sensitive measurements of the photoluminescence (PL) spectra of photovoltaic materials and devices. In many cases, the sensitivity of the FT technique allows rapid room-temperature measurements of weak luminescence spectra that cannot be observed using dispersive PL spectrophotometers. We present here the results of a number of studies of material and device quality obtained using FT-luminescence spectroscopy, including insights into bandgap variations, defect and impurity effects, and relative recombination rates. We also describe our approach to extending the range of the FT-Raman spectrophotometer to cover the region from 11,500 to 3700 cm-1, enabling FT-luminescence measurements to be made from 1.42 to 0.46 eV, and our investigation of FT-PL microspectroscopy.
Date:
July 12, 1999
Creator:
Webb, J. D.; Keyes, B. M.; Ahrenkiel, R. K.; Wanlass, M. W.; Ramanathan, K.; Gedvilas, L. M. et al.
Object Type:
Article
System:
The UNT Digital Library
A Proposal for an Advanced Drilling System with Real-Time Diagnostics (Diagnostics-While-Drilling)
In this paper, we summarize the rationale for an advanced system called Diagnostics-While-Drilling (DWD) and describe its benefits, preliminary configuration, and essential characteristics. The central concept is a closed data circuit in which downhole sensors collect information and send it to the surface via a high-speed data link, where it is combined with surface measurements and processed through drilling advisory software. The driller then uses this information to adjust the drilling process, sending control signals back downhole with real-time knowledge of their effects on performance. We outline a Program Plan for DOE, university, and industry to cooperate in the development of DWD technology.
Date:
July 12, 1999
Creator:
Finger, J. T.; Mansure, A. J. & Prairie, M. R.
Object Type:
Article
System:
The UNT Digital Library
QA objectives for nondestructive assay at the Waste Receiving and Processing (WRAP) Facility
This report summarizes the validation of the WRAP NDA systems against the various QAOs. A brief description of each test and any significant conclusions is included. Variables which may have affected test outcomes are examined. This report will be reviewed semi-annually and updated as necessary.
Date:
July 12, 1999
Creator:
Wills, C. E.
Object Type:
Report
System:
The UNT Digital Library
Monitoring Plan for Fiscal Year 1999 Borehole Logging at 200 East Area Specific Retention Facilities
The Hanford Groundwater Monitoring Project's vadose zone monitoring effort for fiscal year (FY) 1999 involves monitoring 30 boreholes for moisture content and gamma-ray emitting radionuclides. The boreholes are associated with specific retention trenches and cribs in the 200 East Area of the Hanford Site. The facilities to be monitored are the 216-A-2, -4, and -7 cribs, the 216-A-18 trench, the 216-B-14 through -19 cribs, the 216-B-20 through -34, -53A, and -58 trenches, the 216-B-35 through -42 trenches, and the 216-C-5 crib. This monitoring plan describes the facilities and the vadose zone at the cribs and trenches to be monitored; the field activities to be accomplished; the constituents of interest and the monitoring methods, including calibration issues; and the quality assurance and quality control requirements governing the monitoring effort. The results from the FY 1999 monitoring will show the current configuration of subsurface contamination and will be compared with past monitoring results to determine whether changes in contaminant distribution have occurred since the last monitoring effort.
Date:
July 12, 1999
Creator:
Horton, D. G.
Object Type:
Report
System:
The UNT Digital Library
Origin of Compact Triangular Islands in Metal-on-Metal Growth
The microscopic origin of compact triangular islands on close-packed surfaces is identified using kinetic Monte Carlo simulations with energy barriers obtained from density-functional calculations. In contrast to earlier accounts, corner diffusion anisotropy is found to control the shape of compact islands at intermediate temperatures. We rationalize the correlation between the orientation of dendrites grown at low temperatures and triangular islands grown at higher temperatures, and explain why in some systems dendrites grow fat before turning compact.
Date:
July 12, 1999
Creator:
Bogicevic, Alexander; Lundqvist, Bengt I. & Ovesson, Staffan
Object Type:
Article
System:
The UNT Digital Library
South Ramp 3.01.X Area Ground Support Analysis
The purpose of this analysis is to evaluate the stability and determine ground support requirements for the 3.01.X areas in the Exploratory Studies Facility (ESF) South Ramp. The 3.01.X area refers to the ESF tunnel portions that were constructed under Section 3.01.X of the ESF General Construction Specification (Reference 8.4). Four 3.01.X areas in the ESF Main Loop are covered in this analysis that extend from Station 60+15.28 to 60+49.22, 62+04.82 to 62+32.77, 75+21.02 to 75+28.38, and 76+63.08 to 77+41.23. The scope of the analysis is (1) to document the as-built configuration including existing voids and installed ground support, (2) to evaluate the existing ground conditions, (3) to determine applicable design loads, (4) to evaluate the stability and determine a ground support system, and (5) to analyze the recommended system.
Date:
July 12, 1999
Creator:
Bonabian, Saeed
Object Type:
Report
System:
The UNT Digital Library
On the Convergence of an Implicitly Restarted Arnoldi Method
We show that Sorensen's [35] implicitly restarted Arnoldi method (including its block extension) is simultaneous iteration with an implicit projection step to accelerate convergence to the invariant subspace of interest. By using the geometric convergence theory for simultaneous iteration due to Watkins and Elsner [43], we prove that an implicitly restarted Arnoldi method can achieve a super-linear rate of convergence to the dominant invariant subspace of a matrix. Moreover, we show how an IRAM computes a nested sequence of approximations for the partial Schur decomposition associated with the dominant invariant subspace of a matrix.
Date:
July 12, 1999
Creator:
Lehoucq, Richard B.
Object Type:
Article
System:
The UNT Digital Library
A strategy for a realization of a problem free Einstein - Hilbert action along with a problem free toy cosmology
We describe features of a low energy effective Scalar-Tensor theory of gravity having a divergent non-minimal coupling at a point where a fermionic part of the action identically vanishes and is therefore non-dynamical. Under fairly general conditions, theories having a divergent non-minimal coupling at a point can support non-topological soliton solutions. The interior of all sufficiently large solitonic domains approach a unique limit point determined by the vanishing of the effective potential of the non-minimally coupled scalar field. This can lead to a realization of an effective Einstein-Hilbert action with no cosmological constant problem. A cosmology with characteristic features follows.
Date:
July 12, 1999
Creator:
Sethi, Daksh Lohiya and Meetu
Object Type:
Article
System:
The UNT Digital Library
The CDF silicon vertex tracker
The Silicon Vertex Tracker (SVT) is presently being built as part of CDF upgrades. It is the online tracker which will reconstruct 2D tracks using information from the Silicon Vertex Detector (SVXII) and the Central Outer Chamber (COT). The precision measurement of the track impact parameter will allow to select high statistics b samples at trigger level and attack the study of CP violation in the b sector (i.e. in the B<sup>0</sup><sub>d</sub> {yields} {pi}<sup>+</sup>{pi}<sup>-</sup> decay) and of B<sup>0</sup><sub>s</sub> mixing. We discuss the overall architecture, algorithms and hardware implementation of the system.
Date:
July 12, 1999
Creator:
Donati, S.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B1432.0750]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gor for Baroque will perform a variety of chamber music at 7:30 p.m. Monday for the July Summer Concert Series at Penn Square Mall."
Date:
July 12, 1991
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1370.0213]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Former Oklahjoma city police chief Robert Wilder, a Democrat, turns in the paperwork to place his name on the ballot for the state Senate District 44 seat."
Date:
July 12, 1990
Creator:
Southerland, Paul B.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 72, No. 218, Ed. 1 Tuesday, July 12, 1994
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
July 12, 1994
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 73, No. 218, Ed. 1 Wednesday, July 12, 1995
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
July 12, 1995
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 71, No. 218, Ed. 1 Monday, July 12, 1993
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
July 12, 1993
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: AA Anniv]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
July 12, 1999, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[Photograph 2012.201.B0146.0504]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "from left, Ken Novy, Steve Travasos and Debbie St. john cook up something besides chili to promote Seventh Annual State Championship Chili Cook-off set for Saturday at the National Cowboy Hall of Fame."
Date:
July 12, 1994
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0406.0341]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
July 12, 1993
Creator:
Southerland, Paul B.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0406.0344]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
July 12, 1993
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0351.0434]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
July 12, 1993
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0380.0460]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Oklahoma County District Attorney Bob Macy files for re-election Tuesday on the second day of the filing period for state offices."
Date:
July 12, 1994
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History