Serial/Series Title
Chemical Processing Department Monthly Report
11
Federal Emergency Management Information System (FEMIS)
3
Hanford Works Monthly Report
3
Proceedings of the Workshop on Geothermal Reservoir Engineering
3
Fiscal Year 1997
2
Fiscal Year 2005
2
Fiscal Year 2006
2
Fiscal Year 2008
2
Irradiation Processing Department Monthly Record Report
2
Mound Laboratory Monthly Health Information Report
2
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4,113 Matching Results
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Acceptance test report for the AN valve pit leak detection and low point drain assembly mock up test procedure
This document describes The Performance Mock-up Test Procedure for the Valve Pit Leak Detection and Low Point Drain Assembly Performance Mock-Up Test Procedure.
Date:
July 20, 1999
Creator:
Ewer, K. L.
Object Type:
Report
System:
The UNT Digital Library
Acceptance test report MICON software exhaust fan control modifications
This report documents the results the acceptance test HNF-4108 which verifies the MICON program changes for the new automatic transfer switch ATS-2 alarms, the Closed Loop Cooling isolator status, the CB-3 position alarm, the alarms for the new emergency fan damper backup air compressor, and the generator sequencer logic.
Date:
May 20, 1999
Creator:
SILVAN, G.R.
Object Type:
Report
System:
The UNT Digital Library
Accuracy tests of the tessellated SLBM model
We have compared the Seismic Location Base Model (SLBM) tessellated model (version 2.0 Beta, posted July 3, 2007) with the GNEMRE Unified Model. The comparison is done on a layer/depth-by-layer/depth and layer/velocity-by-layer/velocity comparison. The SLBM earth model is defined on a tessellation that spans the globe at a constant resolution of about 1 degree (Ballard, 2007). For the tests, we used the earth model in file ''unified{_}iasp.grid''. This model contains the top 8 layers of the Unified Model (UM) embedded in a global IASP91 grid. Our test queried the same set of nodes included in the UM model file. To query the model stored in memory, we used some of the functionality built into the SLBMInterface object. We used the method get InterpolatedPoint() to return desired values for each layer at user-specified points. The values returned include: depth to the top of each layer, layer velocity, layer thickness and (for the upper-mantle layer) velocity gradient. The SLBM earth model has an extra middle crust layer whose values are used when Pg/Lg phases are being calculated. This extra layer was not accessed by our tests. Figures 1 to 8 compare the layer depths, P velocities and P gradients in the UM …
Date:
July 20, 2007
Creator:
Ramirez, A L & Myers, S C
Object Type:
Report
System:
The UNT Digital Library
Achieving High Flux Amplification in a Gun-driven, Flux-core Spheromak
None
Date:
February 20, 2007
Creator:
Hooper, E. B.; Hill, D. N.; McLean, H. S.; Romero-Talam?s, C. A. & Wood, R. D.
Object Type:
Article
System:
The UNT Digital Library
Achieving high performance in numerical computations on RISC workstations and parallel systems
The nominal peak speeds of both serial and parallel computers is raising rapidly. At the same time however it is becoming increasingly difficult to get out a significant fraction of this high peak speed from modern computer architectures. In this tutorial the authors give the scientists and engineers involved in numerically demanding calculations and simulations the necessary basic knowledge to write reasonably efficient programs. The basic principles are rather simple and the possible rewards large. Writing a program by taking into account optimization techniques related to the computer architecture can significantly speedup your program, often by factors of 10--100. As such, optimizing a program can for instance be a much better solution than buying a faster computer. If a few basic optimization principles are applied during program development, the additional time needed for obtaining an efficient program is practically negligible. In-depth optimization is usually only needed for a few subroutines or kernels and the effort involved is therefore also acceptable.
Date:
August 20, 1997
Creator:
Goedecker, S. & Hoisie, A.
Object Type:
Article
System:
The UNT Digital Library
Acid Gas Removal by Customized Sorbents for Integrated Gasification Fuel Cell Systems
In order to reduce exergy losses, gas cleaning at high temperatures is favored in IGFC systems. As shown by thermodynamic data, separation efficiencies of common sorbents decrease with increasing temperature. Therefore, acid gas removal systems have to be developed for IGFC applications considering sorbent capacity, operation temperature, gasification feedstock composition and fuel cell threshold values.
Date:
September 20, 2002
Creator:
Kapfenberger, J.; Sohnemann, J.; Schleitzer, D. & Loewen, A.
Object Type:
Article
System:
The UNT Digital Library
Acoustic Wave Chemical Microsensors in GaAs
High sensitivity acoustic wave chemical microsensors are being developed on GaAs substrates. These devices take advantage of the piezoelectric properties of GaAs as well as its mature microelectronics fabrication technology and nascent micromachining technology. The design, fabrication, and response of GaAs SAW chemical microsensors are reported. Functional integrated GaAs SAW oscillators, suitable for chemical sensing, have been produced. The integrated oscillator requires 20 mA at 3 VK, operates at frequencies up to 500 MHz, and occupies approximately 2 mmz. Discrete GaAs sensor components, including IC amplifiers, SAW delay lines, and IC phase comparators have been fabricated and tested. A temperature compensation scheme has been developed that overcomes the large temperature dependence of GaAs acoustic wave devices. Packaging issues related to bonding miniature flow channels directly to the GaAs substrates have been resolved. Micromachining techniques for fabricating FPW and TSM microsensors on thin GaAs membranes are presented and GaAs FPW delay line performance is described. These devices have potentially higher sensitivity than existing GaAs and quartz SAW sensors.
Date:
September 20, 1998
Creator:
Baca, Albert G.; Heller, Edwin J.; Frye-Mason, Gregory C.; Reno, John L.; Kottenstette, Richard; Casalnuovo, Stephen A. et al.
Object Type:
Article
System:
The UNT Digital Library
ACS Symposium Support
The funds from this DOE grant were used to help cover the travel costs of five students and postdoctoral fellows who attended a symposium on 'Hydration: From Clusters to Aqueous Solutions' held at the Fall 2007 American Chemical Society Meeting in Boston, MA, August 19-23. The Symposium was sponsored by the Physical Chemistry Division, ACS. The technical program for the meeting is available at http://phys-acs.org/fall2007.html.
Date:
February 20, 2010
Creator:
Jordan, Kenneth D.
Object Type:
Report
System:
The UNT Digital Library
Actinide Cross Section Evaluations
The Livermore Computational Nuclear Physics group is charged with producing updated neutron incident cross section evaluations for all the actinides in the coming year, concentrating on neutron induced fission, neutron capture and (n,2n) cross sections. We attack this daunting task either by adopting other recent evaluations or by performing our own. Owing to the large number of nuclei involved, we seek to automate this process as much as possible. For this purpose, we have developed a series of computer codes: x41, an interface to the EXFOR database, fete, a code that translates ENDF/B formatted evaluations into a computationally convenient form, and da{_}fit, a fitting code that takes all relevant EXFOR data for a reaction or set of reactions and performs a generalized least square fit to them, subject to various constraints and other prior information.
Date:
September 20, 2004
Creator:
Brown, D. A.; Loyola, B. & McNabb, D.
Object Type:
Article
System:
The UNT Digital Library
Activation plan for the W-1 loop
This report defines the work program and schedule required to Activate the plan for the W-1 loop
Date:
December 20, 1965
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Active Seismics to Determine Reservoir Characteristics of a Hot Dry Rock Geothermal System
Since 1981 three wells have been drilled to depths of between 2.0 and 2.6 km in the Carnmenellis granite, Cornwall, England in order to create a HDR geothermal system. These wells are separated by between 150 and 300 m and have been hydraulically connected by massive injections of both water and viscous gel (50 cpoise). Passive microseismic monitoring of the hydraulic stimulation and circulation experiments has been used since 1982 to determine the size and structure of the reservoir, and monitor its growth. The active seismic survey techniques of cross-hole seismics and vertical seismic profiling (VSP) have been introduced to complement the passive microseismic monitoring in characterizing the reservoir. The cross-hole seismic surveys indicate that the microseismicity defines the area of joint dilation. The attenuation of high frequencies in the region of microseismicity suggests that the reservoir is composed of a complex zone of cracks rather than a single large fracture. VSP surveys also show a good agreement between the microseismically defined reservoir and seismic signal attenuation. Recent improvements in hardware, computer processing and interpretation indicate that active seismics will play an increasingly important part in mapping and understanding geothermal reservoirs. 11 figs., 10 refs.
Date:
January 20, 1987
Creator:
Green, A.S.P. & Baria, R.
Object Type:
Article
System:
The UNT Digital Library
Adaptable Multivariate Calibration Models for Spectral Applications
Multivariate calibration techniques have been used in a wide variety of spectroscopic situations. In many of these situations spectral variation can be partitioned into meaningful classes. For example, suppose that multiple spectra are obtained from each of a number of different objects wherein the level of the analyte of interest varies within each object over time. In such situations the total spectral variation observed across all measurements has two distinct general sources of variation: intra-object and inter-object. One might want to develop a global multivariate calibration model that predicts the analyte of interest accurately both within and across objects, including new objects not involved in developing the calibration model. However, this goal might be hard to realize if the inter-object spectral variation is complex and difficult to model. If the intra-object spectral variation is consistent across objects, an effective alternative approach might be to develop a generic intra-object model that can be adapted to each object separately. This paper contains recommendations for experimental protocols and data analysis in such situations. The approach is illustrated with an example involving the noninvasive measurement of glucose using near-infrared reflectance spectroscopy. Extensions to calibration maintenance and calibration transfer are discussed.
Date:
December 20, 1999
Creator:
THOMAS,EDWARD V.
Object Type:
Article
System:
The UNT Digital Library
Adapting an x-ray/debris shield to the cascade ICF power plant: Neutronics issues
A neutronics analysis has been carried out to determine the effects on the Cascade ICF reactor concept of adding a solid-lithium x-ray and debris shield to each ICF capsule. Results indicate that tritium breeding in LiAlO{sub 2} is possible with a modest isotopic enhancement in {sup 6}Li (to 15%). The shallow-burial index is greater than 1 (indicating that deep burial may be required) if the blanket is kept in the reactor for more than 2.5 yr. Nine percent of the total thermal power is unrecoverable. Parts of the chamber wall may require replacement once during the reactor life due to radiation damage. Part of the SiC chamber end cap must be replaced annually. The reactor may not require any nuclear-grade construction. 20 refs., 4 figs., 3 tabs.
Date:
December 20, 1990
Creator:
Tobin, M.T.
Object Type:
Article
System:
The UNT Digital Library
Adaptive low mach number simulations of a premixed turbulent laboratory burner
A parallel adaptive low Mach number model is used to study an experimental lean premixed turbulent methane V-flame that is stabilized on a rod spanning the exit plane of a circular nozzle. The fuel is turbulent due to an upstream perforated-plate, and the resulting flame extends downstream of the rod. We present three-dimensional time-dependent simulations of this configuration. The computations incorporate detailed reaction chemistry and transport using a dynamically adaptive block-structured grid algorithm and a time-split integration procedure. Flow field and flame surface statistics are gathered from the experiment and are compared to the computed results.
Date:
October 20, 2003
Creator:
Day, M.S.; Bell, J.B.; Lijewski, M.J.; Johnson, M.; Cheng, R.K. & Shepherd, I.G.
Object Type:
Article
System:
The UNT Digital Library
Adaptive low Mach number simulations of nuclear flame microphysics
We introduce a numerical model for the simulation of nuclear flames in Type Ia supernovae. This model is based on a low Mach number formulation that analytically removes acoustic wave propagation while retaining the compressibility effects resulting from nuclear burning. The formulation presented here generalizes low Mach number models used in combustion that are based on an ideal gas approximation to the arbitrary equations of state such as those describing the degenerate matter found in stellar material. The low Mach number formulation permits time steps that are controlled by the advective time scales resulting in a substantial improvement in computational efficiency compared to a compressible formulation. We briefly discuss the basic discretization methodology for the low Mach number equations and their implementation in an adaptive projection framework. We present validation computations in which the computational results from the low Mach number model are compared to a compressible code and present an application of the methodology to the Landau-Darrieus instability of a carbon flame.
Date:
March 20, 2003
Creator:
Bell, J. B.; Day, M. S.; Rendleman, C. A.; Woosley, S. E. & Zingale, M. A.
Object Type:
Article
System:
The UNT Digital Library
Adaptive Spindle Balancing Using Magnetically Levitated Bearings
A technological break through for supporting rotating shafts is the active magnetic bearing (AMB). Active magnetic bearings offer some important advantages over conventional ball, roller or journal bearings such as reduced frictional drag, no physical contact in the bearing, no need for lubricants, compatibility with high vacuum and ultra-clean environments, and ability to control shaft position within the bearing. The disadvantages of the AMB system are the increased cost and complexity, reduced bearing stiffness and the need for a controller. Still, there are certain applications, such as high speed machining, biomedical devices, and gyroscopes, where the additional cost of an AMB system can be justified. The inherent actuator capabilities of the AMB offer the potential for active balancing of spindles and micro-shaping capabilities for machine tools, The work presented in this paper concentrates on an AMB test program that utilizes the actuator capability to dynamically balance a spindle. In this study, an unbalanced AMB spindle system was enhanced with an LMS (Least Mean Squares) algorithm combined with an existing PID (proportional, integral, differential) control. This enhanced controller significantly improved the concentricity of an intentionally unbalanced shaft. The study included dynamic system analysis, test validation, control design and simulation, as well …
Date:
September 20, 1999
Creator:
BARNEY,PATRICK S.; LAUFFER,JAMES P.; PETTEYS,REBECCA; REDMOND,JAMES M. & SULLIVAN,WILLIAM N.
Object Type:
Article
System:
The UNT Digital Library
Addendum to the performance assessment analysis for low-level waste disposal in the 200 west area active burial grounds
An addendum was completed to the performance assessment (PA) analysis for the active 200 West Area low-level solid waste burial grounds. The addendum includes supplemental information developed during the review of the PA analysis, an ALARA analysis, a comparison of PA results with the Hanford Groundwater Protection Strategy, and a justification for the assumption of 500 year deterrence to the inadvertent intruder.
Date:
December 20, 1996
Creator:
Wood, M. I.
Object Type:
Report
System:
The UNT Digital Library
Additional guidance for including nuclear safety equivalency in the Canister Storage Building and Cold Vacuum Drying Facility final safety analysis report
This document provides guidance for the production of safety analysis reports that must meet both DOE Order 5480.23 and STD 3009, and be in compliance with the DOE regulatory policy that imposes certain NRC requirements.
Date:
May 20, 1997
Creator:
Garvin, L. J.
Object Type:
Report
System:
The UNT Digital Library
Additional production of uranium-233
None
Date:
November 20, 1964
Creator:
Schroeder, O. C.
Object Type:
Report
System:
The UNT Digital Library
Administration of ORNL Research Reactors
Organization of the ORNL Operations division for administration of the Oak Ridge Research Reactor, the Low Intensity Testing Reactor, and the Oak Ridge Graphite Reactor is described. (J.R.D.)
Date:
August 20, 1962
Creator:
Casto, W. R.
Object Type:
Report
System:
The UNT Digital Library
ADSORPTION FROM SOLUTION METHODS FOR SURFACE AREA MEASUREMENT
>The analytical procedures for wet adsorption methods for surface area measurements are described. (J.S.R.)
Date:
January 20, 1958
Creator:
Mills, G.F.
Object Type:
Report
System:
The UNT Digital Library
Adsorption of Barium (II) on Montmorillonite Surface
None
Date:
July 20, 2000
Creator:
Zhang, Pengchu; Brady, Patrick V.; Arthur, Sara E.; Zhou, Wei-Qing; Sawyer, Dale & Hesterberg, Dean A.
Object Type:
Article
System:
The UNT Digital Library
Advanced Combustion Diagnostics and Control for Furnaces, Fired Heaters and Boilers
The objective of this project was to develop and apply enabling tools and methods towards advanced combustion diagnostics and control of fired-equipment in large-scale petrochemical manufacturing. There are a number of technology gaps and opportunities for combustion optimization, including technologies involving advanced in-situ measurements, modeling, and thermal imaging. These technologies intersect most of manufacturing and energy systems within the chemical industry. This project leveraged the success of a previous DOE funded project led by Dow, where we co-developed an in-situ tunable diode laser (TDL) analyzer platform (with Analytical Specialties Inc, now owned by Yokogawa Electric Corp.). The TDL platform has been tested and proven in a number of combustion processes within Dow and outside of Dow. The primary focus of this project was on combustion diagnostics and control applied towards furnaces, fired heaters and boilers. Special emphasis was placed on the development and application of in-situ measurements for O2, CO and methane since these combustion gases are key variables in optimizing and controlling combustion processes safely. Current best practice in the industry relies on measurements that suffer from serious performance gaps such as limited sampling volume (point measurements), poor precision and accuracy, and poor reliability. Phase I of the project …
Date:
March 20, 2010
Creator:
Tate, J. D.; Le, Linh D.; Knittel,Trevor & Cowie, Alan
Object Type:
Report
System:
The UNT Digital Library
An advanced control system for fine coal flotation
None
Date:
December 20, 1999
Creator:
Adel, G. T. & Luttrell, G. H.
Object Type:
Report
System:
The UNT Digital Library