Development and evaluation of die and container materials. First quarterly progress report, October 1--December 31, 1977. Silicon Sheet Task, Low Cost Silicon Solar Array Project. [For handling molten silicon for crystal growth] (open access)

Development and evaluation of die and container materials. First quarterly progress report, October 1--December 31, 1977. Silicon Sheet Task, Low Cost Silicon Solar Array Project. [For handling molten silicon for crystal growth]

The JPL Low Cost Silicon Solar Array Project has been established with the goal of decreasing the cost of solar photovoltaic arrays for electrical power generation. Methods of producing silicon sheet for solar cells are under active development as one of several tasks designed to achieve this objective. In the crystal growing processes a refractory crucible is required to hold the molten silicon while in the ribbon processes an additional refractory shaping die is needed to enable silicon ribbon to be produced. In several ribbon processes the high temperature materials are a limiting factor in the development of the technique. The objective of this study is to develop and evaluate refractory die and container materials. First quarter studies are reported. Commercial high purity ultrafine Si/sub 3/N/sub 4/, Al/sub 2/O/sub 3/ and SiO/sub 2/ powders were vacuum dried and stored under nitrogen in sealed containers. Extensive analysis of the chemical, physical and morphological characteristics of these powders has been performed. The preparation of high purity A1N powder is being investigated by elevated temperature gas phase nucleation reactions involving (1) the reaction of AlCl/sub 3/(g) and NH/sub 3/ and (2) the reaction between AlCl(g) and NH/sub 3/. While optimization of reaction (1) …
Date: January 18, 1978
Creator: Wills, R R & Neisz, D E
Object Type: Report
System: The UNT Digital Library
Circular waveguide systems for electron-cyclotron-resonant heating of the tandem mirror experiment-upgrade (open access)

Circular waveguide systems for electron-cyclotron-resonant heating of the tandem mirror experiment-upgrade

Extensive use of electron cyclotron resonant heating (ECRH) in the Tandem Mirror Experiment-Upgrade (TMX-U) requires continuous development of components to improve efficiency, increase reliability, and deliver power to new locations with respect to the plasma. We have used rectangular waveguide components on the experiment and have developed, tested, and installed circular waveguide components. We replaced the rectangular with the circular components because of the greater transmission efficiency and power-handling capability of the circular ones. Design, fabrication, and testing of all components are complete for all systems. In this paper we describe the design criteria for the system.
Date: November 18, 1983
Creator: Felker, B.; Calderon, M. O.; Chargin, A. K.; Coffield, F. E.; Gallagher, N. C., Jr.; Lang, D. D. et al.
Object Type: Article
System: The UNT Digital Library
Design and fabrication of circular and rectangular components for electron-cyclotron-resonant heating of tandem mirror experiment-upgrade (open access)

Design and fabrication of circular and rectangular components for electron-cyclotron-resonant heating of tandem mirror experiment-upgrade

The electron-cyclotron-resonant heating (ECRH) systems of rectangular waveguides on Tandem Mirror Experiment-Upgrade (TMX-U) operated with a overall efficiency of 50%, each system using a 28-GHz, 200-kW pulsed gyrotron. We designed and built four circular-waveguide systems with greater efficiency and greater power-handling capabilities to replace the rectangular waveguides. Two of these circular systems, at the 5-kG second-harmonic heating locations, have a total transmission efficiency of >90%. The two systems at the 10-kG fundamental heating locations have a total transmission efficiency of 80%. The difference in efficiency is due to the additional components required to launch the microwaves in the desired orientation and polarization with respect to magnetic-field lines at the 10-kG points. These systems handle the total power available from each gyrotron but do not have the arcing limitation problem of the rectangular waveguide. Each system requires several complex components. The overall physical layout and the design considerations for the rectangular and circular waveguide components are described here.
Date: November 18, 1983
Creator: Felker, B.; Calderon, M. O.; Chargin, A. K.; Coffield, F. E.; Lang, D. D.; Rubert, R. R. et al.
Object Type: Article
System: The UNT Digital Library
Measurement of CP Asymmetries and Branching Fractions in Charmless Two-Body B-Meson Decays to Pions and Kaons (open access)

Measurement of CP Asymmetries and Branching Fractions in Charmless Two-Body B-Meson Decays to Pions and Kaons

We present improved measurements of CP-violation parameters in the decays B{sup 0} {yields} {pi}{sup +}{pi}{sup -}, B{sup 0} {yields} K{sup +}{pi}{sup -}, and B{sup 0} {yields} {pi}{sup 0}{pi}{sup 0}, and of the branching fractions for B{sup 0} {yields} {pi}{sup 0}{pi}{sup 0} and B{sup 0} {yields} K{sup 0}{pi}{sup 0}. The results are obtained with the full data set collected at the {Upsilon}(4S) resonance by the BABAR experiment at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory, corresponding to 467 {+-} 5 million B{bar B} pairs. We find the CP-violation parameter values and branching fractions S{sub {pi}{sup +}{pi}{sup -}} = -0.68 {+-} 0.10 {+-} 0.03, C{sub {pi}{sup +}{pi}{sup -}} = -0.25 {+-} 0.08 {+-} 0.02, {Alpha}{sub K{sup -}{pi}{sup +}} = -0.107 {+-} 0.016{sub -0.004}{sup +0.006}, C{sub {pi}{sup 0}{pi}{sup 0}} = -0.43 {+-} 0.26 {+-} 0.05, {Beta}(B{sup 0} {yields} {pi}{sup 0}{pi}{sup 0}) = (1.83 {+-} 0.21 {+-} 0.13) x 10{sup -6}, {Beta}(B{sup 0} {yields} K0{pi}{sup 0}) = (10.1 {+-} 0.6 {+-} 0.4) x 10{sup -6}, where in each case, the first uncertainties are statistical and the second are systematic. We observe CP violation with a significance of 6.7 standard deviations for B{sup 0} {yields} {pi}{sup +}{pi}{sup -} and 6.1 standard …
Date: June 18, 2012
Creator: Lees, J. P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A. et al.
Object Type: Article
System: The UNT Digital Library
Emplacement Scale Thermal Evaluations of Large and Small WP Designs (open access)

Emplacement Scale Thermal Evaluations of Large and Small WP Designs

The purpose of this analysis is to calculate the thermal response of the repository host rock and near-field surface temperatures due to the heat produced by drift-emplaced waste packages (WPs). The main objective of the evaluation is to predict time-dependent WP surface temperatures for later use as boundary conditions for detailed thermal evaluations of large and small Multi-Purpose Canisters (MPCs), defense high-level waste (DHLW), and uncanistered spent fuel (UCF) waste package conceptual designs. This analysis will also provide a parametric evaluation of the thermal effects of thermal loading and various emplacement parameters to determine what parameters are important to repository thermal behavior.
Date: December 18, 1995
Creator: Bahney, R. H., III
Object Type: Report
System: The UNT Digital Library
Performance of Ultra Hard Carbon Wear Coatings on Microgears Fabricated by Liga (open access)

Performance of Ultra Hard Carbon Wear Coatings on Microgears Fabricated by Liga

Stiction and friction are of concern for the reliable, long-term application of Ni-alloy micromachines. We have found that the application of a 30-70 nm hard carbon coating produces a significant reduction in the friction coefficient and wear rate of electroformed Ni substrates in reciprocating sliding contact under simulated MEMS operating conditions. To evaluate the performance of coated components, a series of 70-pm-thick microgears ranging in diameter from 0.2 to 2.2 mm were fabricated from electroformed Ni via standard LIGA processes and fixtured on posts in preparation for the coating procedure. A pulsed vacuum- arc deposition process was used to deposit a carbon coating on the gears with the plasma incident at a shallow angle to the gears' top surface. A sample bias of -2 keV was used in order to produce a coating with relatively low stress and good adhesion while maintaining high hardness. This coating process is known to be somewhat comformal to the component surfaces. The coating uniformity, particularly in the high-aspect-ratio areas between the gear teeth, was evaluated with micro-Raman spectroscopy. It is shown that the coating can be applied uniformly on the top gear surface. Between the gear teeth the coating was the same thickness as …
Date: December 18, 1998
Creator: Ager, J. W., III; Brown, I. G.; Christenson, T. R.; Dugger, M. T.; Follstaedt, D. M.; Knapp, J. A. et al.
Object Type: Article
System: The UNT Digital Library
The Two Stage Crystal Collimator for Rhic. (open access)

The Two Stage Crystal Collimator for Rhic.

The use of a two stage crystal collimation system in the RHIC yellow ring is examined. The system includes a copper beam scraper and a bent silicon crystal. While scrapers were installed in both of the RHIC rings before the year 2000 run, the crystal is installed for the 2001 run in one ring only, forming a two stage collimation system there. We present simulations of the expected channeling through the bent silicon crystal for both protons and gold ions with various beam parameters. This gives a picture of the particle losses around the ring, and the expected channeling efficiency. These results are then used to optimize the beam parameters in the area of the crystal to obtain maximum channeling efficiency, minimize out-scattering in the secondary collimator, and reduce beam halo.
Date: June 18, 2001
Creator: Fliller, R. P., III; Drees, A.; Gassner, D.; Hammons, L.; McIntyre, G.; Trbojevic, D. et al.
Object Type: Article
System: The UNT Digital Library
Modeling pulsed-laser melting of embedded semiconductor nanoparticles (open access)

Modeling pulsed-laser melting of embedded semiconductor nanoparticles

Pulsed-laser melting (PLM) is commonly used to achieve a fast quench rate in both thin films and nanoparticles. A model for the size evolution during PLM of nanoparticles confined in a transparent matrix, such as those created by ion-beam synthesis, is presented. A self-consistent mean-field rate equations approach that has been used successfully to model ion beam synthesis of germanium nanoparticles in silica is extended to include the PLM process. The PLM model includes classical optical absorption, multiscale heat transport by both analytical and finite difference methods, and melting kinetics for confined nanoparticles. The treatment of nucleation and coarsening behavior developed for the ion beam synthesis model is modified to allow for a non-uniform temperature gradient and for interacting liquid and solid particles with different properties. The model allows prediction of the particle size distribution after PLM under various laser fluences, starting from any particle size distribution including as-implanted or annealed simulated samples. A route for narrowing the size distribution of embedded nanoparticles is suggested, with simulated distribution widths as low as 15% of the average size.
Date: May 18, 2011
Creator: Sawyer, C. A.; Guzman, J.; Boswell-Koller, C. N.; Sherburne, M. P.; Mastandrea, J. P.; Bustillo, K. C. et al.
Object Type: Article
System: The UNT Digital Library
Possible triaxial superdeformation in {sup 174}Hf. (open access)

Possible triaxial superdeformation in {sup 174}Hf.

Three, possibly four, regularly spaced rotational bands with large dynamical moments of inertia, which are consistent with known superdeformed bands in the Lu/Hf region, have been identified in {sup 174}Hf. The states were populated in the {sup 130}Te({sup 48}Ca,4n) reaction at a beam energy of 194 MeV. The Gammasphere array detected the emitted gamma radiation. Ultimate cranker calculations predict substantial triaxial deformation ({gamma} {approx} {+-} 17{sup o}) for highly deformed {sup 174}Hf structures. However, {sup 174}Hf is eight neutrons away from the previously established N = 94 triaxial superdeformed shell gap. Shell gaps at N = 100 and 106 with {gamma} {ge} 15{sup o} are observed when {var_epsilon}{sub 2} {approx} 0.45, which may be responsible for the predicted TSD minima in {sup 174}Hf.
Date: September 18, 2002
Creator: Hartley, D. J.; Djongolov, M.; Riedinger, L. L.; Kondev, F. G.; Janssens, R. V. F.; Abu Saleem, K. et al.
Object Type: Article
System: The UNT Digital Library
Evaluation of COBRA for Use in Distributed Control Systems (open access)

Evaluation of COBRA for Use in Distributed Control Systems

The Common Object Request Broker Architecture (CORBA)-based Simulator was a Laboratory Directed Research and Development (LDRD) project that applied simulation techniques to explore critical questions about advanced distributed control system architectures. A three-prong approach comprised of a study of object-oriented distribution tools, computer network modeling, and simulation of key control system scenarios was used in the LDRD project. This input report describes the first of the three approaches Ñ the study of object-oriented distribution tools together with measurements, and predictions of use within the National Ignition Facility (NIF) and some aspects of CORBA which remain to be resolved. For the ICCS, the completeness of suitable functionality, the speed of performance and utilization of machine and network resources, and the developing nature of the commercial CORBA products themselves, presented a certain risk. This LDRD thus evaluated CORBA in general, and a particular implementation, to determine its features, performance, and scaling properties, and to optimize its use within the ICCS. Both UNIX and real-time operating systems were studied.
Date: February 18, 1999
Creator: Holloway, F. W.
Object Type: Report
System: The UNT Digital Library
Qualification of Reillex{trademark} HPQ anion exchange resin for use in SRS processes (open access)

Qualification of Reillex{trademark} HPQ anion exchange resin for use in SRS processes

The Phase 2 portion of the HB-Line facility was built in the early 1980's to process plutonium and neptunium from nitric acid solutions into oxide suitable for storage in a vault. Although the other portions of HB-Line were started up in the mid 1980's and have operated since that time, the anion exchange and precipitation processes in Phase 2 were never started up. As part of the material stabilization efforts, Phase 2 is currently being started up. A new anion exchange resin is needed because the resins that were proposed for use 10 years ago are limited by performance characteristics, disposal requirements, or are no longer commercially available. SRTC is responsible for qualifying all resins prior to their use in Nuclear Materials Stabilization and Storage (NMSS) processes. Qualification consists of both process suitability and thermal stability with nitric acid. This report describes the thermal stability qualification of Reillex{trademark} HPQ, the new resin proposed for processing plutonium and neptunium in the HB Line facility.
Date: May 18, 2000
Creator: Crooks, W. J., III
Object Type: Report
System: The UNT Digital Library
Completion Report for Model Evaluation Well ER-5-5: Corrective Action Unit 98: Frenchman Flat (open access)

Completion Report for Model Evaluation Well ER-5-5: Corrective Action Unit 98: Frenchman Flat

Model Evaluation Well ER-5-5 was drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office in support of Nevada Environmental Management Operations at the Nevada National Security Site (formerly known as the Nevada Test Site). The well was drilled in July and August 2012 as part of a model evaluation well program in the Frenchman Flat area of Nye County, Nevada. The primary purpose of the well was to provide detailed geologic, hydrogeologic, chemical, and radiological data that can be used to test and build confidence in the applicability of the Frenchman Flat Corrective Action Unit flow and transport models for their intended purpose. In particular, this well was designed to obtain data to evaluate the uncertainty in model forecasts of contaminant migration from the upgradient underground nuclear test MILK SHAKE, conducted in Emplacement Hole U-5k in 1968, which were considered to be uncertain due to the unknown extent of a basalt lava-flow aquifer present in this area. Well ER-5-5 is expected to provide information to refine the Phase II Frenchman Flat hydrostratigraphic framework model, if necessary, as well as to support future groundwater flow and transport modeling. The 31.1-centimeter (cm) diameter hole was drilled to …
Date: January 18, 2013
Creator: Underground Test Area and Boreholes Programs and Operations
Object Type: Report
System: The UNT Digital Library
First Demonstration of Staged Laser Acceleration. (open access)

First Demonstration of Staged Laser Acceleration.

Two independently-driven laser accelerators were operated together in series for the first time in a proof-of-principle experiment to demonstrate staging. The ability to stage together these devices is important for eventually building practical laser-driven accelerators. The laser accelerators consisted of two identical inverse free electron lasers (IFEL), where the first IFEL served as a prebuncher, which created {approx}3-fs long microbunches that were accelerated by the second IFEL. Precise and stable control of the phasing between the microbunches and laser wave inside the second IFEL was demonstrated. The effects of over-modulation of the prebuncher were also investigated. In all cases there was good agreement with the model. Additional details of the microbunch characteristics could be inferred by using the model. Plans for demonstrating monoenergetic laser acceleration are also presented.
Date: June 18, 2001
Creator: Kimura, W. D.; Campbell, L. P.; Dilley, C. E.; Gottschalk, S. C.; Quimby, D. C.; Babzien, M. Ben-Zvi, I. et al.
Object Type: Article
System: The UNT Digital Library
H Out-Diffusion and Device Performance in n-I-p Solar Cells Utilizing High Temperature Hot Wire a-Si:H I-Layers (open access)

H Out-Diffusion and Device Performance in n-I-p Solar Cells Utilizing High Temperature Hot Wire a-Si:H I-Layers

Hydrogen out-diffusion from the n/i interface region plays a major role in controlling the fill factor (FF) and resultant efficiency of n-i-p a-Si:H devices, with the i-layer deposited at high substrate temperatures by the hot wire technique. Modeling calculations have shown that a thin, highly defective layer at this interface, perhaps caused by significant H out-diffusion and incomplete lattice reconstruction, results in sharply lower device FFs due to the large voltage dropped across this defective layer. We have therefore employed buffer layers designed to retard this out-diffusion. We find that an increased H content, either in the n-layer or a thin intrinsic low temperature buffer layer, does not significantly retard this out-diffusion, as observed by SIMS H profiles on devices. However, if this low temperature buffer layer is thick enough, the out-diffusion is minimized, yielding nearly flat H profiles and a much improved device performance. We discuss this behavior in the context of the H chemical potentials and H diffusion coefficients in the high temperature, buffer, n-, and stainless steel substrate layers. Finally, we report a 9.8% initial active area device, fabricated at 16.5 {angstrom}/s, using the insights obtained in this study. Light soaking data are also reported.
Date: November 18, 1998
Creator: Mahan, A. H.; Reedy, R. C., Jr.; Iwaniczko, E.; Wang, Q.; Nelson, B. P.; Xu, Y. et al.
Object Type: Article
System: The UNT Digital Library
Calibration Procedures for a Two-Modulator Generalized Ellipsometer (open access)

Calibration Procedures for a Two-Modulator Generalized Ellipsometer

A Two-Modulator Generalized Ellipsometer (2-MGE) has been extremely useful in characterizing optical properties of uniaxial bulk materials, thin films and diffraction gratings. The instrument consists of two polarizer-photoelastic modulator pairs, one operating as the polarization state generator and the other as the polarization state detector. Each photoelastic modulator operates at a different remnant frequency (such as 50 kHz and 60 kHz), making it possible to measure eight elements of the reduced sample Mueller matrix simultaneously. In certain configurations, light reflection from non-depolarizing anisotropic samples can be completely characterized by a single measurement, and the entire reduced Jones matrix can be determined, including the cross polarization coefficients. The calibration of the instrument involves the measurement of the azimuthal angle of the polarizer with respect to the modulator, the modulation amplitude, and the modulator strain for each polarizer photoelastic modulator pair, where the last two are functions of wavelengths. In addition, it is essential to calibrate the azimuthal angles of the polarization state generator and the polarization state detector with respect to the plane of incidence in the ellipsometry configuration that is used in the measurements. Because two modulators operating at different frequencies are used, these calibrations are actually easier and more …
Date: July 18, 1999
Creator: Chen, C.; Jellison, G. E., Jr. & Modine, F.A.
Object Type: Article
System: The UNT Digital Library
Time-dependent propagation of high-energy laser beams through the atmosphere: II (open access)

Time-dependent propagation of high-energy laser beams through the atmosphere: II

Various factors that can affect thermal blooming in stagnation zones are examined, including stagnation-zone motion, longitudinal air motion in the neighborhood of the stagnation zone, and the effects of scenario noncoplanarity. Of these effects, only the last offers any reasonable hope of reducing the strong thermal blooming that normally accompanies stagnation zones; in particular, noncoplanarity should benefit multipulse more than cw beams. The methods of treating nonhorizontal winds hydrodynamically for cw and multipulse steady-state sources are discussed. Pulse ''self-blooming'' in the triangular pulse approximation is discussed in the context of both single and multipulse propagation. It is shown that self-blooming and multipulse blooming cannot be treated independently.
Date: May 18, 1976
Creator: Fleck, J. A., Jr.; Morris, J. R. & Feit, M. D.
Object Type: Report
System: The UNT Digital Library
Development and Manufacture of Cost Effective Composite Drill Pipe (open access)

Development and Manufacture of Cost Effective Composite Drill Pipe

This technical report presents the engineering research, process development and data accomplishments that have transpired to date in support of the development of Cost Effective Composite Drill Pipe (CDP). The report presents progress made from October 1, 2003 through September 30, 2004 and contains the following discussions: (1) Direct Electrical Connection for Rotary Shoulder Tool Joints; (2) Conductors for inclusion in the pipe wall (ER/DW-CDP); (3) Qualify fibers from Zoltek; (4) Qualify resin from Bakelite; (5) First commercial order for SR-CDP from Integrated Directional Resources (SR-CDP); and (6) Preparation of papers for publication and conference presentations.
Date: March 18, 2005
Creator: Leslie, James C.; Leslie, James C., II; Truong, Lee; Heard, James T. & Manekas, Peter
Object Type: Report
System: The UNT Digital Library
Risk based limits for Operational Safety Requirements (open access)

Risk based limits for Operational Safety Requirements

OSR limits are designed to protect the assumptions made in the facility safety analysis in order to preserve the safety envelope during facility operation. Normally, limits are set based on ``worst case conditions`` without regard to the likelihood (frequency) of a credible event occurring. In special cases where the accident analyses are based on ``time at risk`` arguments, it may be desirable to control the time at which the facility is at risk. A methodology has been developed to use OSR limits to control the source terms and the times these source terms would be available, thus controlling the acceptable risk to a nuclear process facility. The methodology defines a new term ``gram-days``. This term represents the area under a source term (inventory) vs time curve which represents the risk to the facility. Using the concept of gram-days (normalized to one year) allows the use of an accounting scheme to control the risk under the inventory vs time curve. The methodology results in at least three OSR limits: (1) control of the maximum inventory or source term, (2) control of the maximum gram-days for the period based on a source term weighted average, and (3) control of the maximum gram-days …
Date: January 18, 1993
Creator: Cappucci, A. J., Jr.
Object Type: Report
System: The UNT Digital Library
Radiometric Methods for the Determination of Magnesium and Calcium in Portland Cement (open access)

Radiometric Methods for the Determination of Magnesium and Calcium in Portland Cement

Radiometric methods of analysis for magnesium and calcium have been developed as part of a program for the U. S. Atomic Energy Commission. Office of Isotopes Development, which are applicable to the determination of these elements in portland cement Both methods employ, as a precipitant, a standard solution of (NH/sub 4/)/sub 2/HPO/sub 4/ labeled with phosphorus-32. In the presence of NH/ sub 4/OH, this reagent precipitate; MgNH/sub 4/PO/sub 4/ or Ca/sub 3/(PO/sub 4/)/ sub 2/ from a solution of magnesium or calcium ions. The reduction in the radioactivity level of the labeled phosphate solution after precipitation serves as a measure of the phosphate reacted and thus a measure of the quantity of magnesium or calcium present. Studies have been made of the effects of reagent concentration, NH/sub 4/OH concentration, and other experimental variables. The interference of other elements present normally in portland cement and its raw materials has been determined. The concentration ranges for highest accuracy have been found to be 5 to 15 mg of MgO per 100 ml and 15 to 30 mg of CaO per 50 ml. (auth)
Date: February 18, 1960
Creator: Brown, C. T.; Howes, J. E., Jr.; Elleman, T. S.; Townley, C. W. & Sunderman, D.N.
Object Type: Report
System: The UNT Digital Library
Tetra Muon Cooling Ring (open access)

Tetra Muon Cooling Ring

We give a brief overview of recent simulation activities on the design of neutrino factories. Simulation work is ongoing on many aspects of a potential facility, including proton drivers, pion collection and decay channels, phase rotation, ionization cooling, and muon accelerators.
Date: November 18, 2003
Creator: Kahn, S.A.; Usubov, Z.; Raja, R.; Balbekov, V. & Fernow, R.C.
Object Type: Article
System: The UNT Digital Library
Report on water quality, sediment and water chemistry data for water and sediment samples collected from source areas to Melton Hill and Watts Bar reservoirs (open access)

Report on water quality, sediment and water chemistry data for water and sediment samples collected from source areas to Melton Hill and Watts Bar reservoirs

Contamination of surface water and sediments in the Clinch River and Watts Bar Reservoir (CR/WBR) system as a result of past and present activities by the US Department of Energy (DOE) on the Oak Ridge Reservation (ORR) and also activities by non-ORR facilities are being studied by the Clinch River Environmental Restoration Program (CR-ERP). Previous studies have documented the presence of heavy metals, organics, and radionuclides in the sediments of reservoirs in the vicinity. In support of the CR-ERP, during the summer of 1991, TVA collected and evaluated water and sediment samples from swimming areas and municipal water intakes on Watts Bar Reservoir, Melton Hill Reservoir and Norris Reservoir, which was considered a source of less-contaminated reference or background data. Despite the numerous studies, until the current work documented by this report, relatively few sediment or water samples had been collected by the CR-ERP in the immediate vicinity of contaminant point sources. This work focused on water and sediment samples taken from points immediately downstream from suspected effluent point sources both on and off the ORR. In August and September, 1994, TVA sampled surface water and sediment at twelve locations in melton Hill and Watts Bar Reservoirs.
Date: August 18, 1995
Creator: Tomaszewski, T.M.; Bruggink, D.J. & Nunn, D.L.
Object Type: Report
System: The UNT Digital Library
AXIAL TEMPERATURE AND PRESSURE DISTRIBUTION IN EGCR. DEVELOPMENT OF THE PTD-1 PROGRAM (open access)

AXIAL TEMPERATURE AND PRESSURE DISTRIBUTION IN EGCR. DEVELOPMENT OF THE PTD-1 PROGRAM

The equations and procedures of the PTD-1 program for obtaining the surface temperature distribution, the gas bulk temperature, and the pressure distribution for any of the 234 channels in the EGCR are developed. The program, in FORTRAN for the IBM 7090, is designed for any arbitrary power distribution yielding a constant gas outiet temperature or a given maximum surface temperature and includes the effects of thermal radiation on surface and bulk gas temperatures. The flow sheet and some results are included. (auth)
Date: February 18, 1964
Creator: Robinson, J.C. & Lence, J.T.
Object Type: Report
System: The UNT Digital Library
A Digital Computer Program for the Egcr Temperature and Neutron Transient Analysis--Etnata (open access)

A Digital Computer Program for the Egcr Temperature and Neutron Transient Analysis--Etnata

None
Date: November 18, 1963
Creator: Keeton, D. C.
Object Type: Report
System: The UNT Digital Library