241-SY-101 DACS High hydrogen abort limit reduction (SCR 473) acceptance test report (open access)

241-SY-101 DACS High hydrogen abort limit reduction (SCR 473) acceptance test report

The capability of the 241-SY-101 Data Acquisition and Control System (DACS) computer system to provide proper control and monitoring of the 241-SY-101 underground storage tank hydrogen monitoring system utilizing the reduced hydrogen abort limit of 0.69% was systematically evaluated by the performance of ATP HNF-4927. This document reports the results of the ATP.
Date: September 9, 1999
Creator: ERMI, A.M.
Object Type: Report
System: The UNT Digital Library
Accelerator Physics Challenges for Future Linear Colliders (open access)

Accelerator Physics Challenges for Future Linear Colliders

At the present time, there are a number of future linear collider designs with a center-of-mass energy of 500 GeV or more with luminosities in excess of 10{sup -34}cm{sup -2}s{sup -1} . Many of these designs are at an advanced state of development. However, to attain the high luminosity, the colliders require very small beam emittances, strong focusing, and very good stability. In this paper, some of the outstanding issues related to producing and maintaining the small beam sizes are discussed. Although the different designs are based on very different rf technologies, many of these problems are common.
Date: August 9, 1999
Creator: Raubenheimer, Tor O
Object Type: Report
System: The UNT Digital Library
Acceptance Test Procedure for New Pumping and Instrumentation Control Skid M (open access)

Acceptance Test Procedure for New Pumping and Instrumentation Control Skid M

This Acceptance Test Procedure (ATP) verifies proper construction per the design drawings and tests for proper functioning of the Pumping and Instrumentation Control (PIC) skid ''M''. The Scope section lists the systems and functions to be checked. This ATP will be performed at the Site Fabrication Service's (SFS) shop upon completion of construction of the PIC skid.
Date: November 9, 1999
Creator: Koch, M. R.
Object Type: Report
System: The UNT Digital Library
Adopting a Long View to Energy R&D and Global Climate Change (open access)

Adopting a Long View to Energy R&D and Global Climate Change

This report presents the results of an assessment of a test installation of two similar sulfur lamp, or S-lamp lighting systems, with hollow-light guide distribution. The S-lamp, developed by Fusion Lighting, Inc. with support from the U.S. Department of Energy (DOE), Office of Building Technology, Community and State Programs (BTS), was demonstrated as a prototype for the first time in 1994. The S-lamp embodies a new, microwave-powered, electrodeless technology that offers improved energy efficiency and color rendition compared with most available sources. The purpose of this assessment is to provide important information to all of those involved regarding the effectiveness and future applicability of this technology in a postal sorting setting.
Date: August 9, 1999
Creator: Doley, J. J. & Runci, P. J.
Object Type: Report
System: The UNT Digital Library
Advances in Photovoltaics at NREL (open access)

Advances in Photovoltaics at NREL

This paper discusses the critical strategic research and development issues in the development of next-generation photovoltaic technologies, emphasizing thin-film technologies that are believed to ultimately lead to lower production costs. The critical research and development issues for each technology are identified. An attempt is made to identify the strengths and weaknesses of the different technologies, and to identify opportunities for fundamental research activities suited to advance the introduction of improved photovoltaic modules.
Date: September 9, 1999
Creator: von Roedern, Bolko
Object Type: Article
System: The UNT Digital Library
Analysis and validation of laser spot weld-induced distortion (open access)

Analysis and validation of laser spot weld-induced distortion

Laser spot welding is an ideal process for joining small parts with tight tolerances on weld size, location, and distortion, particularly those with near-by heat sensitive features. It is also key to understanding the overlapping laser spot seam welding process. Rather than attempting to simulate the laser beam-to-part coupling (particularly if a keyhole occurs), it was measured by calorimetry. This data was then used to calculate the thermal and structural response of a laser spot welded SS304 disk using the finite element method. Five combinations of process parameter values were studied. Calculations were compared to experimental data for temperature and distortion profiles measured by thermocouples and surface profiling. Results are discussed in terms of experimental and modeling factors. The authors then suggest appropriate parameters for laser spot welding.
Date: December 9, 1999
Creator: Knorovsky, G. A.; Kanouff, M. P.; Maccallum, D. O. & Fuerschbach, P. W.
Object Type: Article
System: The UNT Digital Library
Analysis of wind power ancillary services characteristics with German 250-MW wind data (open access)

Analysis of wind power ancillary services characteristics with German 250-MW wind data

With the increasing availability of wind power worldwide, power fluctuations have become a concern for some utilities. Under electric industry restructuring in the US, the impact of these fluctuations will be evaluated by examining provisions and costs of ancillary services for wind power. This paper analyzes wind power in the context of ancillary services, using data from a German 250 Megawatt Wind project.
Date: December 9, 1999
Creator: Ernst, B.
Object Type: Report
System: The UNT Digital Library
An Analytical Model for Simulating Heavy-Oil Recovery by Cyclic Steam Injection Using Horizontal Wells, SUPRI TR-118 (open access)

An Analytical Model for Simulating Heavy-Oil Recovery by Cyclic Steam Injection Using Horizontal Wells, SUPRI TR-118

In this investigation, existing analytical models for cyclic steam injection and oil recovery are reviewed and a new model is proposed that is applicable to horizontal wells. A new flow equation is developed for oil production during cyclic steaming of horizontal wells. The model accounts for the gravity-drainage of oil along the steam-oil interface and through the steam zone. Oil viscosity, effective permeability, geometry of the heated zone, porosity, mobile oil saturation, and thermal diffusivity of the reservoir influence the flow rate of oil in the model. The change in reservoir temperature with time is also modeled, and it results in the expected decline in oil production rate during the production cycle as the reservoir cools. Wherever appropriate, correlations and incorporated to minimize data requirements. A limited comparison to numerical simulation results agrees well, indicating that essential physics are successfully captured. Cyclic steaming appears to be a systematic met hod for heating a cold reservoir provided that a relatively uniform distribution of steam is obtained along the horizontal well during injection. A sensitivity analysis shows that the process is robust over the range of expected physical parameters.
Date: August 9, 1999
Creator: Diwan, Utpal & Kovscek, Anthony R.
Object Type: Report
System: The UNT Digital Library
Application of Advanced Reservoir Characterization, Simulation, and Production Optimization Strategies to Maximize Recovery in Slope and Basin Clastic Reservoirs, West Texas (Delaware Basin) (open access)

Application of Advanced Reservoir Characterization, Simulation, and Production Optimization Strategies to Maximize Recovery in Slope and Basin Clastic Reservoirs, West Texas (Delaware Basin)

The objective of this Class 3 project was demonstrate that detailed reservoir characterization of slope and basin clastic reservoirs in sandstones of the Delaware Mountain Group in the Delaware Basin of West Texas and New Mexico is a cost effective way to recover a higher percentage of the original oil in place through strategic placement of infill wells and geologically based field development. Project objectives are divided into two main phases. The original objectives of the reservoir-characterization phase of the project were (1) to provide a detailed understanding of the architecture and heterogeneity of two representative fields of the Delaware Mountain Group, Geraldine Ford and Ford West, which produce from the Bell Canyon and Cherry Canyon Formations, respectively, (2) to chose a demonstration area in one of the fields, and (3) to simulate a CO 2 flood in the demonstration area.
Date: November 9, 1999
Creator: Dutton, Shirley P.
Object Type: Report
System: The UNT Digital Library
Application of Advanced Reservoir Characterization, Simulation, and Production Optimization Strategies to Maximize Recovery in Slope and Basin Clastic Reservoirs, West Texas (Delaware Basin) (open access)

Application of Advanced Reservoir Characterization, Simulation, and Production Optimization Strategies to Maximize Recovery in Slope and Basin Clastic Reservoirs, West Texas (Delaware Basin)

The objective of this Class 3 project was demonstrate that detailed reservoir characterization of slope and basin clastic reservoirs in sandstones of the Delaware Mountain Group in the Delaware Basin of West Texas and New Mexico is a cost effective way to recover a higher percentage of the original oil in place through strategic placement of infill wells and geologically based field development. Project objectives are divided into two main phases. The original objectives of the reservoir-characterization phase of the project were (1) to provide a detailed understanding of the architecture and heterogeneity of two representative fields of the Delaware Mountain Group, Geraldine Ford and Ford West, which produce from the Bell Canyon and Cherry Canyon Formations, respectively, (2) to chose a demonstration area in one of the fields, and (3) to simulate a CO 2 flood in the demonstration area.
Date: November 9, 1999
Creator: Dutton, Shirley
Object Type: Report
System: The UNT Digital Library
Architecture for Teraflop Visualization (open access)

Architecture for Teraflop Visualization

Sandia Laboratories' computational scientists are addressing a very important question: How do we get insight from the human combined with the computer-generated information? The answer inevitably leads to using scientific visualization. Going one technology leap further is teraflop visualization, where the computing model and interactive graphics are an integral whole to provide computing for insight. In order to implement our teraflop visualization architecture, all hardware installed or software coded will be based on open modules and dynamic extensibility principles. We will illustrate these concepts with examples in our three main research areas: (1) authoring content (the computer), (2) enhancing precision and resolution (the human), and (3) adding behaviors (the physics).
Date: April 9, 1999
Creator: Breckenridge, A.R. & Haynes, R.A.
Object Type: Article
System: The UNT Digital Library
Atomic Physics (open access)

Atomic Physics

None
Date: July 9, 1999
Creator: unknown
Object Type: Article
System: The UNT Digital Library
BASIN ANALYSIS OF THE MISSISSIPPI INTERIOR SALT BASIN AND PETROLEUM SYSTEM MODELING OF THE JURASSIC SMACKOVER FORMATION, EASTERN GULF COASTAL PLAIN (open access)

BASIN ANALYSIS OF THE MISSISSIPPI INTERIOR SALT BASIN AND PETROLEUM SYSTEM MODELING OF THE JURASSIC SMACKOVER FORMATION, EASTERN GULF COASTAL PLAIN

Part 2 (Basin Analysis of the Mississippi Interior Salt Basin) objectives are to provide a comprehensive analysis of the Mississippi Interior Salt Basin in Years 2 and 3 of the project and to transfer effectively the research results to producers through workshops and topical reports. Work accomplished so far: (Task 1) Tectonic History--Petroleum traps in the Mississippi Interior Salt Basin have been characterized. (Task 2) Depositional History--The depositional systems for Mesozoic strata in the Mississippi Interior Salt Basin have been identified and characterized. (Task 3) Fluid Flow--Modeling of 1-D burial and thermal history profiles for 48 wells in the Mississippi Interior Salt Basin has been completed. Multidimensional thermal maturity modeling has been initiated. (Task 4) Underdeveloped Plays--Three major exploration plays have been identified. These include the basement ridge play, the regional peripheral fault trend play, and the salt anticline play. (Task 5) Technology Transfer--No work was performed on this task for this quarter. (Task 6) Topical Reports--The topical reports on the tectonic, depositional, burial and thermal histories of the Mississippi Interior Salt Basin have been completed and sent to DOE.
Date: April 9, 1999
Creator: Ernest A,. Mancini
Object Type: Report
System: The UNT Digital Library
Bent solenoid simulations for the muon cooling experiment (open access)

Bent solenoid simulations for the muon cooling experiment

The muon collider captures pions using solenoidal fields. The pion are converted to muons as they are bunched in an RF phase rotation system. Solenoids are used to focus the muons as their emitance is reduced during cooling. Bent solenoids are used to sort muons by momentum. This report describes a bent solenoid system that is part of a proposed muon cooling experiment. The superconducting solenoid described in this report consists of a straight solenoid that is 1.8 m long, a bent solenoid that is 1.0 m to 1.3 m long and a second straight solenoid that is 2.6 m long. The bent solenoid bends the muons over an angle of 57.3 degrees (1 radian). The bent solenoid has a minor coil radius (to the center of the coil) that is 0.24 m and a major radius (of the solenoid axis) of 1.0 m. The central induction along the axis is 3.0 T There is a dipole that generates an induction of 0.51 T, perpendicular to the plane of the bend, when the induction on the bent solenoid axis is 3.0 T.
Date: July 9, 1999
Creator: Green, M. A.; Eyssa, Y. M.; Kenney, S.; Miller, J. R. & Prestemon, S.
Object Type: Article
System: The UNT Digital Library
Calculation and Validation of Thermomechanical Stresses in Flip Chip BGA Using the ATC4.2 Test Vehicle (open access)

Calculation and Validation of Thermomechanical Stresses in Flip Chip BGA Using the ATC4.2 Test Vehicle

We report the first in situ measurements of thermomechanical stresses in a 1000 I/O 250 {micro}m pitch piezoresistive flip chip test chip assembled to a 755 I/O 1.0 mm pitch 35 mm Ball Grid Array (BGA). The BGA substrates employed build-up dielectric layers containing micro-vias over conventional fiberglass laminate cores. Experimental data, which include in situ stress and die bending measurements, were correlated to closed form and Finite Element Method (FEM) calculations. Cracking and delamination were observed in some of the experimental groups undergoing temperature cycling. Through use of bounding conditions in the FEM simulations, these failures were associated with debonding of the underfill fillet from the die edge that caused stresses to shift to weaker areas of the package.
Date: March 9, 1999
Creator: Burchett, S.N.; Mitchell, R.T.; Nguyen, L.; Peterson, D.W. & Sweet, J.N.
Object Type: Article
System: The UNT Digital Library
Canister Storage Building (CSB) Design Basis Accident Analysis Documentation (open access)

Canister Storage Building (CSB) Design Basis Accident Analysis Documentation

This document provides the detailed accident analysis to support ''HNF-3553, Spent Nuclear Fuel Project Final Safety, Analysis Report, Annex A,'' ''Canister Storage Building Final Safety Analysis Report.'' All assumptions, parameters, and models used to provide the analysis of the design basis accidents are documented to support the conclusions in the Canister Storage Building Final Safety Analysis Report.
Date: September 9, 1999
Creator: CROWE, R.D.
Object Type: Report
System: The UNT Digital Library
CENTRALITY AND ET FLUCTUATIONS FROM P+BE TO AU+AU AT AGS ENERGIES. (open access)

CENTRALITY AND ET FLUCTUATIONS FROM P+BE TO AU+AU AT AGS ENERGIES.

None
Date: August 9, 1999
Creator: TANNENBAUM,M.J. FOR THE E802 COLLABORATION.
Object Type: Article
System: The UNT Digital Library
Characterization of Thermally Degraded Energetic Materials: Experiments and Constitutive Modeling (open access)

Characterization of Thermally Degraded Energetic Materials: Experiments and Constitutive Modeling

None
Date: December 9, 1999
Creator: RENLUND,ANITA M.; SCHMITT,ROBERT G.; WELLMAN,GERALD W. & MILLER,JILL C.
Object Type: Article
System: The UNT Digital Library
CIS-Type PV Device Fabrication by Novel Techniques; Phase I Annual Technical Report, 1 July 1998 - 30 June 1999 (open access)

CIS-Type PV Device Fabrication by Novel Techniques; Phase I Annual Technical Report, 1 July 1998 - 30 June 1999

This report describes work performed by International Solar Electric Technology, Inc. (ISET) during phase I of the R&D partnership subcontract titled ''CIS-Type PV Device Fabrication by Novel Techniques.'' The objective of this program is to bring ISET's novel non-vacuum CIS technology closer to commercialization by concentrating on issues such as device-efficiency improvement, larger-bandgap absorber growth, and module fabrication. Advances made in CIS and related compound solar cell fabrication processes have clearly shown that these materials and device structures can yield power conversion efficiencies in the 15%-20% range. However, many of the laboratory results on CIS-type devices have been obtained using relatively high-cost vacuum-based deposition techniques. The present project was specifically geared toward developing a low-cost, non-vacuum ''particle deposition'' method for CIS-type absorber growth. There are four major processing steps in this technique: (i) preparation of a starting powder containing all or some of the chemical species constituting CIS, (ii) preparation of an ink using the starting powder, (iii) deposition of the ink on a substrate in the form of a thin precursor layer, and (iv) conversion of the precursor layer into a fused photovoltaic absorber through annealing steps. During this Phase I program, ISET worked on tasks that were geared …
Date: August 9, 1999
Creator: Basol, B. M.; Halani, A.; Kapur, V. K.; Leidholm, C. R.; Norsworthy, G. & Roe, R.
Object Type: Report
System: The UNT Digital Library
Close Encounters of Asteroids and Comets to Planets (open access)

Close Encounters of Asteroids and Comets to Planets

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The authors find by numerical simulations that the elongated-potato shape that is characteristic of Earth-crossing asteroids (ECAs) is likely the result of previous close tidal encounters with Earth. Some meteoroids graze the atmosphere of Earth before returning to space (at reduced speed). They used a spherical atmospheric model to study such grazers to find the condition under which they are captured into gravitationally bound orbits around Earth. They find that for about every thousand iron asteroids that hit the Earth, one is captured into a gravitational-bound orbit. Some fraction of these captured objects will have their orbits stabilized for many revolutions by tidal encounters with the Moon and the sun. They have also studied how the damage produced by such grazing and near-grazing asteroids differs from that produced by asteroids that hit Earth more directly.
Date: July 9, 1999
Creator: Hills, J.G.; Goda, M.P. & Solem, J.C.
Object Type: Report
System: The UNT Digital Library
A Comparison of Mass Rate and Steam Quality Reductions to Optimize Steamflood Performance (open access)

A Comparison of Mass Rate and Steam Quality Reductions to Optimize Steamflood Performance

Many operators of steamdrive projects will reduce the heat injection rate as the project matures. The major benefit of this practice is to reduce the fuel costs and thus extend the economic life of the project. However, there is little industry consensus on whether the heat cuts should take the form of: (1) mass rate reductions while maintaining the same high steam quality, or (2) steam quality decreases while keeping the same mass rate. Through the use of a commercial three-phase, three-dimensional simulator, the oil recovery schedules obtained when reducing the injected steam mass rate or quality with time were compared under a variety of reservoir and operating conditions. The simulator input was validated for Kern River Field conditions by using the guidelines developed by Johnson, et at. (1989) for four steamflood projects in Kern River. The results indicate that for equivalent heat injection rates, decreasing the steam injection mass rate at a constant high quality will yield more economic oil than reducing the steam quality at a constant mass rate. This conclusion is confirmed by a sensitivity analysis which demonstrates the importance of the gravity drainage/steam zone expansion mechanism in a low-pressure, heavy oil steamflood with gravity segregation. Furthermore, …
Date: August 9, 1999
Creator: Messner, Gregory L.
Object Type: Report
System: The UNT Digital Library
Computer Simulation of Single-Well Steam Assisted Gravity Drainage (SW-SAGD), SUPRI TR-119 (open access)

Computer Simulation of Single-Well Steam Assisted Gravity Drainage (SW-SAGD), SUPRI TR-119

Steam assisted gravity drainage (SAGD) is an effective method of producing heavy oil and bitumen. In a typical SAGD approach, steam is injected into a horizontal well located directly above a horizontal producer. A steam chamber grows around the injection well and helps displace heated oil toward the production well. Single-well (SW) SAGD attempts to create a similar process using only one horizontal well. This may include steam injection from the toe of the horizontal well with production at the heel. Obvious advantages of SW-SAGD include cost savings and utility in relatively thin reservoirs. However, the process is technically challenging. To improve early-time response of SW-SAGD, it is necessary to heat the near-wellbore area to reduce oil viscosity and allow gravity drainage to take place. Ideally heating should occur with minimal circulation or bypassing of stream. Since project economics are sensitive to early production response, we are interested in optimizing the start -up procedure.
Date: August 9, 1999
Creator: Elliott, Keith T. & Kovscek, Anthony R.
Object Type: Report
System: The UNT Digital Library
Conformal Symmetry as a Template:Commensurate Scale Relations and Physical Renormalization Schemes (open access)

Conformal Symmetry as a Template:Commensurate Scale Relations and Physical Renormalization Schemes

Commensurate scale relations are perturbative QCD predictions which relate observable to observable at fixed relative scale, such as the ''generalized Crewther relation'', which connects the Bjorken and Gross-Llewellyn Smith deep inelastic scattering sum rules to measurements of the e{sup +}e{sup {minus}} annihilation cross section. We show how conformal symmetry provides a template for such QCD predictions, providing relations between observables which are present even in theories which are not scale invariant. All non-conformal effects are absorbed by fixing the ratio of the respective momentum transfer and energy scales. In the case of fixed-point theories, commensurate scale relations relate both the ratio of couplings and the ratio of scales as the fixed point is approached. In the case of the {alpha}{sub V} scheme defined from heavy quark interactions, virtual corrections due to fermion pairs are analytically incorporated into the Gell-Mann Low function, thus avoiding the problem of explicitly computing and resuming quark mass corrections related to the running of the coupling. Applications to the decay width of the Z boson, the BFKL pomeron, and virtual photon scattering are discussed.
Date: June 9, 1999
Creator: Brodsky, Stanley J.
Object Type: Report
System: The UNT Digital Library
Consideration on Isochronal Anneal Technique: From Measurement to Physics (open access)

Consideration on Isochronal Anneal Technique: From Measurement to Physics

The isochronal anneal technique used to predict isothermal anneal behavior of MOS devices is analyzed as a function of experimental parameters. The effects of detrapping of trapped holes and compensating electrons are discussed.
Date: March 9, 1999
Creator: Flament, O.; Fleetwood, D. M.; Leray, J. L. & Paillet, P.
Object Type: Article
System: The UNT Digital Library