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Evaluation of the Cask Transportation Facility Modifications (CTFM) compliance to DOE order 6430.1A
This report was prepared to evaluate the compliance of Cask Transportation Facility Modifications (CTFM) to DOE Order 6430.1A.
Date:
July 14, 1999
Creator:
ARD, K.E.
Object Type:
Report
System:
The UNT Digital Library
XAF/XANES studies of plutonium-loaded sodalite/glass composite waste forms.
A sodalite/glass ceramic waste form has been developed to immobilize highly radioactive nuclear wastes in chloride form, as part of an electrochemical cleanup process. Simulated waste forms have been fabricated which contain plutonium and are representative of the salt from the electrometallurgical process to recover uranium from spent nuclear fuel. X-ray absorption fine structure spectroscopy (XAFS) and x-ray absorption near-edge spectroscopy (XANES) studies were performed to determine the location, oxidation state and form of the plutonium within these waste forms. Plutonium, in the non-fission-element case, was found to segregate as plutonium(IV) oxide with a crystallite size of at least 20 nm. With fission elements present, the crystallite size was about 2 nm. No plutonium was observed within the sodalite or glass in the waste form.
Date:
July 14, 1999
Creator:
Aase, S. B.; Kropf, A. J.; Lewis, M. A.; Reed, D. T. & Richmann, M. K.
Object Type:
Article
System:
The UNT Digital Library
Direct Measurement of A{sub c} using Inclusive Charm Tagging at the SLD Detector
We report a new measurement of A{sub c} using data obtained by SLD in 1993-98. This measurement uses a vertex tag technique, where the selection of a c hemisphere is based on the reconstructed mass of the charm hadron decay vertex. The method uses the 3D vertexing capabilities of SLD's CCD vertex detector and the small and stable SLC beams to obtain a high c-event tagging efficiency and purity of 28% and 82%, respectively. Charged kaons identified by the CRID detector and the charge of the reconstructed vertex provide an efficient quark-antiquark tag, with the analyzing power calibrated from the data. We obtain a preliminary result of A{sub c} = 0.603 {+-} 0.028 {+-} 0.023.
Date:
July 14, 1999
Creator:
Abe, K
Object Type:
Report
System:
The UNT Digital Library
Current Performance of the SLD VXD3
During 1996, the SLD collaboration completed construction and began operation of a new charge-coupled device (CCD) vertex detector (VXD3). Since then, its performance has been studied in detail and a new topological vertexing technique has been developed. In this paper, we discuss the design of VXD3, procedures for aligning it, and the tracking and vertexing improvements that have led to its world-record performance.
Date:
September 14, 1999
Creator:
Abe, Toshinori
Object Type:
Report
System:
The UNT Digital Library
[Abilene City Council Minutes: 1999]
Ledger containing minutes of the City Council in Abilene, Texas documenting the group's discussions and activities from January 14, 1999 to December 16, 1999.
Date:
1999-01-14/1999-12-16
Creator:
Abilene (Tex.)
Object Type:
Book
System:
The Portal to Texas History
Electrochemical corrosion testing of metal waste forms
Electrochemical corrosion tests have been conducted on simulated stainless steel-zirconium (SS-Zr) metal waste form (MWF) samples. The uniform aqueous corrosion behavior of the samples in various test solutions was measured by the polarization resistance technique. The data show that the MWF corrosion rates are very low in groundwaters representative of the proposed Yucca Mountain repository. Galvanic corrosion measurements were also conducted on MWF samples that were coupled to an alloy that has been proposed for the inner lining of the high-level nuclear waste container. The experiments show that the steady-state galvanic corrosion currents are small. Galvanic corrosion will, hence, not be an important mechanism of radionuclide release from the MWF alloys.
Date:
December 14, 1999
Creator:
Abraham, D. P.; Peterson, J. J.; Katyal, H. K.; Keiser, D. D. & Hilton, B. A.
Object Type:
Article
System:
The UNT Digital Library
Wakefield and Beam Centering Measurements of a Damped and Detuned X-Band Accelerator Structure
In the Next Linear Collider (NLC) design, X-Band (11.4 GHz) accelerator structures are used to accelerate multibunch beams to several hundred GeV. Although these structures allow for high gradient operation, their strong deflecting modes impose a number of operational constraints. In particular, the long-range transverse wakefields generated by the bunches need to be reduced by about two orders of magnitude to prevent significant beam breakup. During the past five years, a reduction scheme that employs both detuning and damping of the structure dipole modes has been developed to meet this requirement. Several prototype Damped and Detuned Structures (DDS) have been built to test and refine this scheme. The wakefield of the latest version, DDS3, has recently been measured in the Accelerator Structure Setup (ASSET) facility at SLAC. In this paper, we present these results together with predictions based on an equivalent circuit model of the structure. We also present ASSET studies in which the beam-induced dipole signals that are coupled out for damping purposes are used to center the beam in the structure.
Date:
September 14, 1999
Creator:
Adolphsen, Chris
Object Type:
Report
System:
The UNT Digital Library
Preliminary analysis of the failure of well EW-05, Visalia Pole Yard, February 1, 1999
None
Date:
May 14, 1999
Creator:
Aines, R D & Newmark, R
Object Type:
Report
System:
The UNT Digital Library
Capture Zone Analyses of Two Airlift Recirculation Wells in the Southern Sector of A/M Area
This report documents a series of capture zone analyses performed to access the expected overall performance of two (of the twelve) vertical airlift recirculation wells (ARWs) (specifically, SSR-011 and SRR-012) located in the Southern Sector of A/M Area.
Date:
September 14, 1999
Creator:
Aleman, S. E.
Object Type:
Report
System:
The UNT Digital Library
PEPC LRU: Ball Support Assembly
The PEPC LRU upper ball support assembly consists of a ball and a pneumatic air cylinder/conical seat latching mechanism to be attached to the optics support frame,and a ball attached to the PEPC LRU. Both components are designed to allow manual positioning in three axes. Upon insertion of the PEPC LRU into the structure, the upper pneumatic cylinder is actuated to latch the two assemblies together through the conical seat device to grab the lower ball to support the LRU weight. To be conservative, the design load for the assembly is 1500 pounds (the prototype PEPC LRU weight was measured to be near 1380 pounds).
Date:
May 14, 1999
Creator:
Alger, T
Object Type:
Report
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 84, Ed. 1 Thursday, January 14, 1999
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
January 14, 1999
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 140, Ed. 1 Wednesday, April 14, 1999
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 14, 1999
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
GUIDELINES FOR MIXING AND PLACING THERMALLY CONDUCTIVE CEMENTITIOUS GROUT (MIX 111).
None
Date:
December 14, 1999
Creator:
Allan, M. L.
Object Type:
Report
System:
The UNT Digital Library
Ion Implantation of In{sub 0.53}Ga{sub 0.47}As
None
Date:
May 14, 1999
Creator:
Almonte, Marlene I.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Two-dimensional Rayleigh model of vapor bubble evolution
The understanding of vapor bubble generation in an aqueous tissue near a fiber tip has required advanced two dimensional (2D) hydrodynamic simulations. For 1D spherical bubble expansion a simplified and useful Rayleigh-type model can be applied. For 2D bubble evolution, such a model does not exist. The present work proposes a Rayleigh-type model for 2D bubble expansion that is faster and simpler than the 2D hydrodynamic simulations. The model is based on a flow potential representation of the hydrodynamic motion controlled by a Laplace equation and a moving boundary condition. We show that the 1D Rayleigh equation is a specific case of our model. The Laplace equation is solved for each time step by a finite element solver using a triangulation of the outside bubble region by a fast unstructured mesh generator. Two problems of vapor bubbles generated by short-pulse lasers near a fiber tip-are considered: (a) the outside region has no boundaries except the fiber, (b) the fiber and the bubble are confined in a long channel, which simulates a fiber in a vessel wall. Our simulations for problems of type (a) include features of bubble evolution as seen in experiments, including a collapse away from the fiber tip. …
Date:
January 14, 1999
Creator:
Amendt, P; Friedman, M; Glinsky, M; Gurewitz, E; London, R A & Strauss, M
Object Type:
Article
System:
The UNT Digital Library
Self-consistent evolution of tissue damage under stress wave propagation
Laser-initiated stress waves are reflected from tissue boundaries, thereby inducing tensile stresses, which are responsible for tissue damage. A self-consistent model of tissue failure evolution induced by stress wave propagation is considered. The failed tissue is represented by an ensemble of spherical voids and includes the effect of nucleation, growth and coalescence of voids under stress wave tension. Voids nucleate around impurities and grow according to an extended Rayleigh model that includes the effects of surface tension, viscosity and acoustic emission at void collapse. The damage model is coupled self-consistently to a one-dimensional planar hydrodynamic model of stress waves generated by a short pulse laser. We considered the problem of a bipolar wave generated by a short pulse laser absorbed on a free boundary of an aqueous system. The propagating wave includes a tensile component, which interacts with the impurities of exponential distribution in dimension, impurity density ({approximately}10{sup 8} cm{sup -3}) void and an ensemble of voids is generated. For moderate growth reduces the tensile wave component and causes the pressure to oscillate between tension and compression. For low impurity density ({approximately}10{sup 6} cm{sup -3} ) the bubbles grow on a long time scale (5-10 {micro}sec) relative to the wave …
Date:
January 14, 1999
Creator:
Amendt, P; Glinsky, M; Kaufman, Y; London, R A; Sapir, M & Strauss, M
Object Type:
Article
System:
The UNT Digital Library
Detection of Volatile Organics Using a Surface Acoustic Wave Array System
A chemical sensing system based on arrays of surface acoustic wave (SAW) delay lines has been developed for identification and quantification of volatile organic compounds (VOCs). The individual SAW chemical sensors consist of interdigital transducers patterned on the surface of an ST-cut quartz substrate to launch and detect the acoustic waves and a thin film coating in the SAW propagation path to perturb the acoustic wave velocity and attenuation during analyte sorption. A diverse set of material coatings gives the sensor arrays a degree of chemical sensitivity and selectivity. Materials examined for sensor application include the alkanethiol-based self-assembled monolayer, plasma-processed films, custom-synthesized conventional polymers, dendrimeric polymers, molecular recognition materials, electroplated metal thin films, and porous metal oxides. All of these materials target a specific chemical fi.mctionality and the enhancement of accessible film surface area. Since no one coating provides absolute analyte specificity, the array responses are further analyzed using a visual-empirical region-of-influence (VERI) pattern recognition algorithm. The chemical sensing system consists of a seven-element SAW array with accompanying drive and control electronics, sensor signal acquisition electronics, environmental vapor sampling hardware, and a notebook computer. Based on data gathered for individual sensor responses, greater than 93%-accurate identification can be achieved for …
Date:
October 14, 1999
Creator:
Anderson, Lawrence F.; Bartholomew, John W.; Cernosek, Richard W.; Colburn, Christopher W.; Crooks, R. M.; Martinez, R. F. et al.
Object Type:
Article
System:
The UNT Digital Library
A strength and damage model for rock under dynamic loading
A thermodynamically consistent strength and failure model for granite under dynamic loading has been developed and evaluated. The model agrees with static strength measurements and describes the effects of pressure hardening, bulking, porous compaction, porous dilation, tensile failure, and failure under compression due to distortional deformations. This paper briefly describes the model and the sensitivity of the simulated response to variations in the model parameters and in the inelastic deformation processes used in different simulations. 1D simulations of an underground explosion in granite are used in the sensitivity study.
Date:
June 14, 1999
Creator:
Antoun, T H; Glenn, L A; Lomov, I N & Vorobiev, O
Object Type:
Article
System:
The UNT Digital Library
Simulations of an underground explosion in granite
This paper describes the results of a computational study performed to investigate the behavior of granite under shock wave loading conditions. A thermomechanically consistent constitutive model that includes the effects of bulking, yielding, material damage, and porous compaction on the material response was used in the simulations. The model parameters were determined based on experimental data, and the model was then used in a series of one-dimensional simulations of PILE DRIVER, a deeply-buried explosion in a granite formation at the Nevada Test Site. Particle velocity histories, peak velocity and peak displacement as a function of slant range, and the cavity radius obtained from the code simulations compared favorably with PILE DRIVER data.
Date:
June 14, 1999
Creator:
Antoun, T; Glenn, L A; Lomov, I N & Vorobiev, O Y
Object Type:
Article
System:
The UNT Digital Library
Properties of electrostatically-driven granular medium: Phase transitions and charge transfer
The experimental and theoretical study of electrostatically driven granular material are reported. It is shown that the charged granular medium undergoes a hysteretic first order phase transition from the immobile condensed state (granular solid) to a fluidized dilated state (granular gas) with a changing applied electric field. In addition a spontaneous precipitation of dense clusters from the gas phase and subsequent coarsening--coagulation of these clusters is observed. Molecular dynamics simulations shows qualitative agreement with experimental results.
Date:
October 14, 1999
Creator:
Aranson, I. S.; Kalatsky, V. A.; Crabtree, G. W.; Kwok, W.-K.; Vinokur, V. M. & Welp, U.
Object Type:
Article
System:
The UNT Digital Library
Victorian Christmas
Photograph of a Victorian Christmas scene in Historic Downtown Guthrie.
Date:
December 14, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Victorian Christmas
Photograph of a Victorian Christmas scene in Historic Downtown Guthrie.
Date:
December 14, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Victorian Christmas
Photograph of a Victorian Christmas scene in Historic Downtown Guthrie.
Date:
December 14, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Victorian Christmas
Photograph of a Victorian Christmas scene in Historic Downtown Guthrie.
Date:
December 14, 1999
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History