A chronicle of costs (open access)

A chronicle of costs

This report contains the history of all estimated costs associated with the superconducting super collider.
Date: April 1, 1994
Creator: Elioff, T.
Object Type: Report
System: The UNT Digital Library
Thin film conductive polymer for microactuator and micromuscle applications (open access)

Thin film conductive polymer for microactuator and micromuscle applications

Conductive polymer/polyimide bimorphic microcantilevers have been actuated vertically (out-of-plane) upon the volumetric changes induced by electrochemical doping of the polymer. The microcantilevers that are 200-500 {mu}m in length and 50-100 {mu}m in width can be fully extended from a circularly-curled geometry, and thus generate more than 100 {mu}m displacement. Dynamically the microcantilevers have been driven as fast as 1.2 Hz and the polymer was stable for over a week stored in air and light. Residual stresses in the polymer film is estimated to be as high as 254 MPa, and actuation stresses are as high as 50 MPa.
Date: April 14, 1994
Creator: Lee, A. P.; Hong, K.; Trevino, J. & Northrup, M. A.
Object Type: Article
System: The UNT Digital Library
Hood River and Pelton Ladder Evaluation Studies: Annual Report 1993. (open access)

Hood River and Pelton Ladder Evaluation Studies: Annual Report 1993.

The primary goals of the Hood River Production Project are (1) to increase production with wild summer and winter steelhead and (2) to reintroduce spring chinook into the Hood River subbasin.
Date: April 1, 1994
Creator: Olsen, Erik A.; French, Rod A. & Newton, James A.
Object Type: Report
System: The UNT Digital Library
Transportation legislative data base: State radioactive materials transportation statute compilation, 1989--1993 (open access)

Transportation legislative data base: State radioactive materials transportation statute compilation, 1989--1993

The Transportation Legislative Data Base (TLDB) is a computer-based information service containing summaries of federal, state and certain local government statutes and regulations relating to the transportation of radioactive materials in the United States. The TLDB has been operated by the National Conference of State Legislatures (NCSL) under cooperative agreement with the US Department of Energy`s (DOE) Office of Civilian Radioactive Waste Management since 1992. The data base system serves the legislative and regulatory information needs of federal, state, tribal and local governments, the affected private sector and interested members of the general public. Users must be approved by DOE and NCSL. This report is a state statute compilation that updates the 1989 compilation produced by Battelle Memorial Institute, the previous manager of the data base. This compilation includes statutes not included in the prior compilation, as well as newly enacted laws. Statutes not included in the prior compilation show an enactment date prior to 1989. Statutes that deal with low-level radioactive waste transportation are included in the data base as are statutes from the states of Alaska and Hawaii. Over 155 new entries to the data base are summarized in this compilation.
Date: April 1, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
High performance computing and communications: FY 1995 implementation plan (open access)

High performance computing and communications: FY 1995 implementation plan

The High Performance Computing and Communications (HPCC) Program was formally established following passage of the High Performance Computing Act of 1991 signed on December 9, 1991. Ten federal agencies in collaboration with scientists and managers from US industry, universities, and laboratories have developed the HPCC Program to meet the challenges of advancing computing and associated communications technologies and practices. This plan provides a detailed description of the agencies` HPCC implementation plans for FY 1994 and FY 1995. This Implementation Plan contains three additional sections. Section 3 provides an overview of the HPCC Program definition and organization. Section 4 contains a breakdown of the five major components of the HPCC Program, with an emphasis on the overall directions and milestones planned for each one. Section 5 provides a detailed look at HPCC Program activities within each agency. Although the Department of Education is an official HPCC agency, its current funding and reporting of crosscut activities goes through the Committee on Education and Health Resources, not the HPCC Program. For this reason the Implementation Plan covers nine HPCC agencies.
Date: April 1, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Low dose neutron late effects: Cataractogenesis. Final progress report, April 1, 1992--March 31, 1993 (open access)

Low dose neutron late effects: Cataractogenesis. Final progress report, April 1, 1992--March 31, 1993

The work is formulated to resolve the uncertainty regarding the relative biological effectiveness (RBE) of low dose neutron radiation. The study exploits the fact that cataractogenesis is sensitive to the inverse dose-rate effect as has been observed with heavy ions and was an endpoint considered in the follow-up of the A-bomb survivors. The neutron radiations were initiated at the Radiological Research Accelerator facility (RARAF) of the Nevis Laboratory of Columbia University. Four week old ({+-} 1 day) rats were divided into eight dose groups each receiving single or fractionated total doses of 0.2, 1.0, 5.0 and 25.0 cGy of monoenergetic 435 keV neutrons. Special restraining jigs insured that the eye, at the midpoint of the lens, received the appropriate energy and dose with a relative error of {+-} 5%. The fractionation regimen consisted of four exposures, each administered at three hour ({+-} 1 minute) intervals. The neutron irradiated groups were compared to rats irradiated with 250 kVp X-rays in doses ranging from 0.5 to 7 Gy. The animals were examined on a biweekly basis utilizing conventional slit-lamp biomicroscopy and the Scheimpflug Slit Lamp Imaging System (Zeiss). The follow-ups, which proceeded for over 2 years, are now complete. This proved essential …
Date: April 1, 1994
Creator: Worgul, B. V.
Object Type: Report
System: The UNT Digital Library
Enhancing in situ bioremediation with pneumatic fracturing (open access)

Enhancing in situ bioremediation with pneumatic fracturing

A major technical obstacle affecting the application of in situ bioremediation is the effective distribution of nutrients to the subsurface media. Pneumatic fracturing can increase the permeability of subsurface formations through the injection of high pressure air to create horizontal fracture planes, thus enhancing macro-scale mass-transfer processes. Pneumatic fracturing technology was demonstrated at two field sites at Tinker Air Force Base, Oklahoma City, Oklahoma. Tests were performed to increase the permeability for more effective bioventing, and evaluated the potential to increase permeability and recovery of free product in low permeability soils consisting of fine grain silts, clays, and sedimentary rock. Pneumatic fracturing significantly improved formation permeability by enhancing secondary permeability and by promoting removal of excess soil moisture from the unsaturated zone. Postfracture airflows were 500% to 1,700% higher than prefracture airflows for specific fractured intervals in the formation. This corresponds to an average prefracturing permeability of 0.017 Darcy, increasing to an average of 0.32 Darcy after fracturing. Pneumatic fracturing also increased free-product recovery rates of number 2 fuel from an average of 587 L (155 gal) per month before fracturing to 1,647 L (435 gal) per month after fracturing.
Date: April 1, 1994
Creator: Anderson, D.B.; Peyton, B.M.; Liskowitz, J.L.; Fitzgerald, C. & Schuring, J.R.
Object Type: Report
System: The UNT Digital Library
Lattice and continuum theories (open access)

Lattice and continuum theories

The authors investigate path integral formalism for continuum theory. It is shown that the path integral for the soft modes can be represented in the form of a lattice theory. Kinetic term of this lattice theory has a standard form and potential term has additional nonlocal terms which contributions should tend to zero in the limit of continuum theory. Contributions of these terms can be estimated. It is noted that this representation of path integral may be useful to improve lattice calculations taking into account hard modes contribution by standard perturbative expansion. They discuss translation invariance of correlators and the possibility to construct a lattice theory which keeps rotary invariance also.
Date: April 1, 1994
Creator: V.M.Belyaev
Object Type: Article
System: The UNT Digital Library
Interaction Between Beam Control and RF Feedback Loops for High Q Cavities an Heavy Beam Loading (open access)

Interaction Between Beam Control and RF Feedback Loops for High Q Cavities an Heavy Beam Loading

An open-loop state space model of all the major low-level rf feedback control loops is derived. The model has control and state variables for fast-cycling machines to apply modern multivariable feedback techniques. A condition is derived to know when exactly we can cross the boundaries between time-varying and time-invariant approaches for a fast-cycling machine like the Low Energy Booster (LEB). The conditions are dependent on the Q of the cavity and the rate at which the frequency changes with time. Apart from capturing the time-variant characteristics, the errors in the magnetic field are accounted in the model to study the effects on synchronization with the Medium Energy Booster (MEB). The control model is useful to study the effects on beam control due to heavy beam loading at high intensities, voltage transients just after injection especially due to time-varying voltages, instability thresholds created by the cavity tuning feedback system, cross coupling between feedback loops with and without direct rf feedback etc. As a special case we have shown that the model agrees with the well known Pedersen model derived for the CERN PS booster. As an application of the model we undertook a detailed study of the cross coupling between the …
Date: April 1, 1994
Creator: Mestha, L. K.; Kwan, C. M. & Yeung, K. S.
Object Type: Report
System: The UNT Digital Library
Environmental data management at Fernald (open access)

Environmental data management at Fernald

FERMCO supports DOE`s ongoing initiatives for the continuous improvement of site restoration through the development and application of innovative technologies. A major thrust of FERMCO`s efforts has been the enhancement of environmental data management technology for the site. The understanding of environmental data is the fundamental basis for determining the need for environmental restoration, developing and comparing remedial alternatives, and reaching a decision on how to clean up a site. Environmental data management at Fernald is being focused on two major objectives: to improve the efficiency of the data management process, and to provide a better understanding of the meaning of the data at the earliest possible time. Environmental data at Fernald is typically a soil or groundwater sample collected by one of the field geologists. These samples are then shipped to one or more laboratories for analysis. After the analyses are returned from the laboratories the data are reviewed and qualified for usability. The data are then used by environmental professionals for determining nature and extent of contamination. Additionally, hazardous waste materials whether generated during production or during cleanup, may be sampled to characterize the waste before shipment or treatment. The data management process, which uses four major software …
Date: April 22, 1994
Creator: Jones, B.W. & Williams, J.
Object Type: Article
System: The UNT Digital Library
Low-Level Waste Forum notes and summary reports for 1994. Volume 9, Number 2, April 1994 (open access)

Low-Level Waste Forum notes and summary reports for 1994. Volume 9, Number 2, April 1994

This is a publication of the Low-Level Radioactive Waste Forum Participants. The topics of the publication include DOE policy, state concerns and activities, court hearings and decisions, federal agency activities, US NRC waste management function reorganization, low-level radioactive waste storage and compaction, and US NRC rulemaking and hearings.
Date: April 1, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Application of MACH2 to explosive magnetic flux compression generators: Improvements in detonation modeling. Final report (open access)

Application of MACH2 to explosive magnetic flux compression generators: Improvements in detonation modeling. Final report

Dramatic improvements have been made to the detonation modeling capability recently incorporated into MACH2. These improvements significantly improve the flexibility of the detonation model, allow for accurate depiction of real explosives, and permit highly efficient modeling of long, coaxial generators. In this document, we will first describe these improvements in some detail. We will then discuss the calibration of the detonation model to two explosive materials, PBX9501 and PBXN110. Finally, we will demonstrate the code`s capability for modeling long, coaxial magnetocumulative generators.
Date: April 27, 1994
Creator: Watrous, John J. & Frese, Michael H.
Object Type: Report
System: The UNT Digital Library
The Theory of Hadronic Systems. Annual Progress Report April 8, 1994 (open access)

The Theory of Hadronic Systems. Annual Progress Report April 8, 1994

This report briefly discusses progress on the following topics: isospin breaking in the pion-nucleon system; the np charge-exchange reaction; energy dependence of pion DCX; pion absorption in nuclei; quantum effects in inclusive reactions; and pion scattering from polarized nuclei.
Date: April 8, 1994
Creator: Gibbs, William R.
Object Type: Report
System: The UNT Digital Library
Global methods for nonlinear complementarity problems (open access)

Global methods for nonlinear complementarity problems

Global methods for nonlinear complementarity problems formulate the problem as a system of nonsmooth nonlinear equations approach, or use continuation to trace a path defined by a smooth system of nonlinear equations. We formulate the nonlinear complementarity problem as a bound-constrained nonlinear least squares problem. Algorithms based on this formulation are applicable to general nonlinear complementarity problems, can be started from any nonnegative starting point, and each iteration only requires the solution of systems of linear equations. Convergence to a solution of the nonlinear complementarity problem is guaranteed under reasonable regularity assumptions. The converge rate is Q-linear, Q-superlinear, or Q-quadratic, depending on the tolerances used to solve the subproblems.
Date: April 1, 1994
Creator: More, J. J.
Object Type: Report
System: The UNT Digital Library
CaWingz user`s guide (open access)

CaWingz user`s guide

This document assumes that you have read and understood the Wingz user`s manuals. CaWingz is an external Wingz program which, when combined with a set of script files, provides easy-to-use EPICS channel access interface functions for Wingz users. The external function run allows Wingz user to invoke any Unix processor within caWingz. Few additional functions for accessing static database field and monitoring of value change event is available for EPICS users after release 3.11. The functions, script files, and usage are briefly described in this document. The script files supplied here serve as examples only. Users are responsible for generating their own spreadsheet and script files. CaWingz communicates with IOC through channel access function calls.
Date: April 25, 1994
Creator: Cha, Ben-chin
Object Type: Report
System: The UNT Digital Library
Transverse temperature distributions and heat generation rate in composite conductors subjected to a constant thermal disturbance (open access)

Transverse temperature distributions and heat generation rate in composite conductors subjected to a constant thermal disturbance

Analytical solution of one-dimensional, transient heat conduction with distributed heat source is obtained to predict the transverse temperature distribution and heat generation rate per unit volume of the composite conductor. The solution indicates that the temperature distribution and the heat generation rate depend on three dimensionless parameters; the dimensionless external disturbance w{sub 0}, the dimensionless interface temperature {theta}{sup *}, and the dimensionless parameter {phi} which depends on the thickness and the thermal conductivity of the superconductor. Results of the transient and steady-state solution are presented. It is shown that the heat generation rate per unit volume of the composite Q/Q{sub c} is directly proportional to the current in the stabilizer. The dimensionless total internal generation rate w{sub t} in the superconductor is shown to reach a maximum at Q/Q{sub c} = 0.5 because w{sub t} depends on two competing factors, the current in the superconductor and the electric field strength which is proportional to the current in the stabilizer. The result of the present analysis reduces to a known steady-state solution in the absence of an external disturbance. Limitations of the present analytical model are discussed.
Date: April 1, 1994
Creator: Cha, Y.S.
Object Type: Report
System: The UNT Digital Library
The Sundance fault: A newly recognized shear zone at Yucca Mountain, Nevada (open access)

The Sundance fault: A newly recognized shear zone at Yucca Mountain, Nevada

Ongoing detailed mapping at a scale of 1:240 of structural features within the potential repository area indicates the presence of several previously unrecognized structural features. Minor north-trending west-side-down faults occur east and west of the Ghost Dance fault and suggest a total width of the Ghost Dance fault system of nearly 366 m (1200 ft). A zone of near-vertical N30{degrees} {minus} 40{degrees}W {minus} trending faults, at least 274 m (900 ft) wide, has been identified in the northern part of our study area and may traverse across the proposed repository area. On the basis of a preliminary analysis of available data, we propose to name this zone the ``Sundance fault system`` and the dominant structure, occurring near the middle of the zone, the ``Sundance fault.`` Some field relations suggest left-stepping deflections of north-trending faults along a preexisting northwest-trending structural fabric. Other field observations suggest that the ``Sundance fault system`` offsets the Ghost Dance fault system in an apparent right lateral sense by at least 52 m (170 ft). Additional detailed field studies, however, are needed to better understand structural complexities at Yucca Mountain.
Date: April 1, 1994
Creator: Spengler, R. W.; Braun, C. A.; Martin, L. G. & Weisenberg, C. W.
Object Type: Report
System: The UNT Digital Library
Measured solubilities and speciations from oversaturation experiments of neptunium, plutonium, and americium in UE-25p No. 1 well water from the Yucca Mountain region: Milestone report 3329-WBS1.2.3.4.1.3.1 (open access)

Measured solubilities and speciations from oversaturation experiments of neptunium, plutonium, and americium in UE-25p No. 1 well water from the Yucca Mountain region: Milestone report 3329-WBS1.2.3.4.1.3.1

Solubility and speciation are important in understanding aqueous radionuclide transport through the geosphere. They define the source term for transport retardation processes such as sorption and colloid formation. Solubility and speciation data are useful in verifying the validity of geochemical codes that are a part of predictive transport models. Results are presented from solubility and speciation experiments of {sup 237}NpO{sub 2}{sup +}, {sup 239}Pu{sup 4+}, and {sup 241}Am{sup 3+}/Nd{sup 3+} in a modified UE-25p No. 1 groundwater (from the Yucca Mountain region, Nevada, which is being investigated as a potential high-level nuclear waste disposal site) at two different temperatures (25{degree} and 60{degree}C) and three pH values (6.0, 7.0, 8.5). The solubility-controlling steady-state solids were identified and the speciation and/or oxidation states present in the supernatant solutions were determined. The neptunium solubility decreased with increasing temperature and pH. Plutonium concentrations significantly decreased with increasing temperature at pH 6 and 7. The concentration at pH 8.5 hardly decreased at all with increasing temperature. At both temperatures the concentrations were highest at pH 8.5, lowest at pH 7, and in between at pH 6. For the americium/neodymium solutions, the solubility decreased significantly with increasing temperature and increased somewhat with increasing pH.
Date: April 1, 1994
Creator: Nitsche, H.; Roberts, K.; Prussin, T.; Mueller, A.; Becraft, K.; Keeney, D. et al.
Object Type: Report
System: The UNT Digital Library
Calcite deposits in drill cores USW G-2 and USW GU-3/G-3 at Yucca Mountain, Nevada: Preliminary report (open access)

Calcite deposits in drill cores USW G-2 and USW GU-3/G-3 at Yucca Mountain, Nevada: Preliminary report

Yucca Mountain is being studied as a potential site for deep geologic disposal of high-level radioactive waste. Should a repository be developed at Yucca Mountain, the preferred location is within the upper unsaturated tuffaceous volcanic rocks. In this location, one factor of concern is the amount and rate of aqueous transport through the unsaturated rocks toward the underlying saturated intervals. Calcite, one of the most recently-formed minerals at Yucca Mountain, is of minor abundance in the unsaturated rocks but is widely distributed. Studies of calcite ages, isotopic systematics, chemistry and petrography could lead to a better understanding of transport processes at Yucca Mountain.
Date: April 1, 1994
Creator: Vaniman, D.T.
Object Type: Report
System: The UNT Digital Library
Free-air CO{sub 2} enrichment for forests: Prototype development (open access)

Free-air CO{sub 2} enrichment for forests: Prototype development

This paper presents details of a study that was done to assess the damage that elevated carbon dioxide has on forest ecosystems. Topics discussed include: elevated concentration of carbon dioxide can it be maintained at ground level; effects of wind variations; is there a problem with carbon dioxide and how serious is it; and can forests management strategies be altered to sustain forest productivity, health and diversity.
Date: April 1, 1994
Creator: Hendrey, G. & Strain, B.
Object Type: Report
System: The UNT Digital Library
Total-system performance assessment for Yucca Mountain -- SNL second iteration (TSPA-1993); Executive summary (open access)

Total-system performance assessment for Yucca Mountain -- SNL second iteration (TSPA-1993); Executive summary

Sandia National Laboratories has completed the second iteration of the periodic total-system performance assessments (TSPA-93) for the Yucca Mountain Site Characterization Project (YMP). Scenarios describing expected conditions (aqueous and gaseous transport of contaminants) and low-probability events (human-intrusion drilling and volcanic intrusion) are modeled. The hydrologic processes modeled include estimates of the perturbations to ambient conditions caused by heating of the repository resulting from radioactive decay of the waste. TSPA-93 incorporates significant new detailed process modeling, including two- and three-dimensional modeling of thermal effects, groundwater flow in the saturated-zone aquifers, and gas flow in the unsaturated zone. Probabilistic analyses are performed for aqueous and gaseous flow and transport, human intrusion, and basaltic magmatic activity. Results of the calculations lead to a number of recommendations concerning studies related to site characterization. Primary among these are the recommendations to obtain better information on percolation flux at Yucca Mountain, on the presence or absence of flowing fractures, and on physical and chemical processes influencing gaseous flow. Near-field thermal and chemical processes, and waste-container degradation are also areas where additional investigations may reduce important uncertainties. Recommendations for repository and waste-package design studies are: (1) to evaluate the performance implications of large-size containers, and (2) to …
Date: April 1, 1994
Creator: Wilson, M. L.; Barnard, R. W. & Gauthier, J. H.
Object Type: Report
System: The UNT Digital Library
Review and selection of unsaturated flow models (open access)

Review and selection of unsaturated flow models

Since the 1960`s, ground-water flow models have been used for analysis of water resources problems. In the 1970`s, emphasis began to shift to analysis of waste management problems. This shift in emphasis was largely brought about by site selection activities for geologic repositories for disposal of high-level radioactive wastes. Model development during the 1970`s and well into the 1980`s focused primarily on saturated ground-water flow because geologic repositories in salt, basalt, granite, shale, and tuff were envisioned to be below the water table. Selection of the unsaturated zone at Yucca Mountain, Nevada, for potential disposal of waste began to shift model development toward unsaturated flow models. Under the US Department of Energy (DOE), the Civilian Radioactive Waste Management System Management and Operating Contractor (CRWMS M&O) has the responsibility to review, evaluate, and document existing computer models; to conduct performance assessments; and to develop performance assessment models, where necessary. This document describes the CRWMS M&O approach to model review and evaluation (Chapter 2), and the requirements for unsaturated flow models which are the bases for selection from among the current models (Chapter 3). Chapter 4 identifies existing models, and their characteristics. Through a detailed examination of characteristics, Chapter 5 presents the …
Date: April 4, 1994
Creator: Reeves, M.; Baker, N. A. & Duguid, J. O.
Object Type: Report
System: The UNT Digital Library
The effect of sliding velocity on the mechanical response of an artificial joint in Topopah Spring Member tuff; Yucca Mountain Site Characterization Project (open access)

The effect of sliding velocity on the mechanical response of an artificial joint in Topopah Spring Member tuff; Yucca Mountain Site Characterization Project

A smooth artificial joint in Topopah Spring Member tuff was sheared at constant normal stress at velocities from 0 to 100 {mu}m/s to determine the velocity-dependence of shear strength. Two different initial conditions were used: (1) unprimed -- the joint had been shear stress-free since last application of normal stress, and before renewed shear loading; and (2) primed -- the joint had undergone a slip history after application of normal stress, but before the current shear loading. Observed steady-state rate effects were found to be about 3 times lager than for some other silicate rocks. These different initial conditions affected the character of the stress-slip curve immediately after the onset of slip. Priming the joint causes a peak in the stress-slip response followed by a transient decay to the steady-state stress, i.e., slip weakening. Slide-hold-slide tests exhibit time-dependent strengthening. When the joint was subjected to constant shear stress, no slip was observed; that is, joint creep did not occur. One set of rate data was collected from a surface submerged in tap water, the friction was higher for this surface, but the rate sensitivity was the same as that for surfaces tested in the air-dry condition.
Date: April 1, 1994
Creator: Olsson, W. A.
Object Type: Report
System: The UNT Digital Library
X-ray standing wave study of the Bi/GaAs and Bi/GaP interfaces (open access)

X-ray standing wave study of the Bi/GaAs and Bi/GaP interfaces

Interfaces are one of the most important elements determining the characteristics of electronic devices. Composite semiconductors, specifically the III-V family, are technologically attractive because of their mobility and optical properties, and also because they offer the possibility of engineering such properties as the size of the band gap. Nevertheless, Si has remained the most utilized semiconductor material, primarily because the fabrication of practical MOSFETs with III-V semiconductors remains elusive. Examples of such complex interfaces are the structures formed by one monolayer of Bi on the (110) surface of GaAs and GaP. While better matched Column V elements form epitaxial continuous monolayers on III-V semiconductor (110) surfaces, Bi is too large to accommodate on GaAs and GaP surfaces with long range order, and vacancies appear to allow relaxation. For the ideal systems, symmetry imposes the presence of only two nonequivalent adatom sites. However, for Bi/GaAs and Bi/GaP, more than two different sites are present because the position of Bi atoms next to a vacancy is not necessarily equivalent to that between other Bi atoms. The geometry of the Bi/GaAs and Bi/GaP systems was determined here by triangulating XSW results from three Bragg planes. A methodology was developed that provides an intrinsic …
Date: April 1, 1994
Creator: Herrera-Gomez, A.
Object Type: Report
System: The UNT Digital Library