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BALTRIM v.1
BalTrim is an Excel(R) spreadsheet designed to calculate the inertial mass properties and ballast trim weight for either an assembled reentry vehicle (RV) or reentry body (RB). With this application, the user enters known mass properties and global coordinates for each subcomponent of the assembly, and BalTrim calculates the mass properties of the total assembly. Then, using the assembly mass properties, BalTrim calculates the necessary amount of ballast trim weight required to dynamically and statically balance the assembly mass properties. The final mass properties and trim ballast weight calculated with BalTrim agree with physicaly measured values.
Date:
February 1, 1999
Creator:
Gaffney, Thomas M.
Object Type:
Report
System:
The UNT Digital Library
Batch Tests with IONSIV IE-911 and a Simulant of the Savannah River Site ''Average'' Supernatant: Distribution Ratios vs Time
The Department of Energy (DOE) is required by law to treat and safely dispose of the radioactive wastes from its nuclear weapon production activities. The primary radionuclide in the DOE liquid wastes or supernatants is {sup 137}Cs. At the Savannah River Site (SRS), the In-Tank Precipitation (ITP) process was selected as the baseline technology to remove {sup 137}Cs from the supernatants, which are stored in underground storage tanks. In the ITP process, tetraphenylborate reacts with the water-soluble cesium to form a precipitant. The treated supernatant can then be immobilized in grout or saltstone and stored in vaults at the SRS. However, problems were encountered during the full-scale ITP processing. These difficulties have led to the evaluation of alternative technologies and/or concepts to the currently configured ITP process. The High-Level Waste Salt Disposition Team at the SRS is currently performing this assessment. After an initial screening of all potential alternatives, the Salt Disposition Team selected four primary options to evaluate further before the final down-selection. Crystalline silicotitanate (CST), an inorganic ion exchanger, was chosen as one of the leading alternatives. Since nearly all of the CST tests have been performed on supernatants from Hanford and Oak Ridge, the Salt Disposition Team …
Date:
February 1, 1999
Creator:
Anderson, K. K.; Collins, J. L.; Hunt, R. D. & Lee, D. D.
Object Type:
Report
System:
The UNT Digital Library
Bayesian Inference for Neural Electromagnetic Source Localization: Analysis of MEG Visual Evoked Activity
We have developed a Bayesian approach to the analysis of neural electromagnetic (MEG/EEG) data that can incorporate or fuse information from other imaging modalities and addresses the ill-posed inverse problem by sarnpliig the many different solutions which could have produced the given data. From these samples one can draw probabilistic inferences about regions of activation. Our source model assumes a variable number of variable size cortical regions of stimulus-correlated activity. An active region consists of locations on the cortical surf ace, within a sphere centered on some location in cortex. The number and radi of active regions can vary to defined maximum values. The goal of the analysis is to determine the posterior probability distribution for the set of parameters that govern the number, location, and extent of active regions. Markov Chain Monte Carlo is used to generate a large sample of sets of parameters distributed according to the posterior distribution. This sample is representative of the many different source distributions that could account for given data, and allows identification of probable (i.e. consistent) features across solutions. Examples of the use of this analysis technique with both simulated and empirical MEG data are presented.
Date:
February 1, 1999
Creator:
George, J. S.; Schmidt, D. M. & Wood, C. C.
Object Type:
Article
System:
The UNT Digital Library
Baytown Connection (Baytown, Tex.), Vol. 2, No. 1, Ed. 1 Monday, February 1, 1999
Newspaper from Baytown, Texas published by the Exxon Corporation that includes news and information of interest to current and former employees of the Baytown facilities.
Date:
February 1, 1999
Creator:
Pfennig, Glena
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 80, Ed. 1 Monday, February 1, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 1, 1999
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
Beam Test of High-Performance Hadron Calorimeter for Future Linear Colliders
None
Date:
February 1, 1999
Creator:
Arisaka, Katsushi; /UCLA; Fujii, Yoshiaki; Kanzaki, Jun'ichi; /KEK, Tsukuba; Kanaya, Naoko et al.
Object Type:
Report
System:
The UNT Digital Library
Beyond the Numbers, Volume 2, Number 2, February 1999
Periodic paper series discussing information about occupational training, labor markets, and related information in Texas.
Date:
February 1, 1999
Creator:
Anderberg, Marc; Campbell, Robin & Lewis, Norman, Jr.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Biomass power for rural development. Quarterly report, October 3, 1998--January 1, 1999
Information and education activities for this quarter include both the monthly progress activities with some copies of materials developed and a copy of the annual report prepared for the Leopold Center for Sustainable Agriculture. The Leopold Center is a project partner and the primary sponsor of the information and education activities. The Leopold annual report references many prepared documents and assorted presentation materials. The Energy and Geological Resources Division of the Iowa Department of Natural Resources sponsors a meeting four times a year in order to bring members of the Iowa biomass energy community together to share information. In this quarter the Stakeholders meeting was held on October 21, 1998, in Des Moines Iowa. The first phase of the Geographic Information System (GIS) efforts have been completed and a final report with a map presentation of materials will be included in the next Quarterly Report. A meeting with Ed Gray of The Antares Group and project staff/cooperators was held October 23, 1998. The authors discussed the Niagara Project and the efforts to value the biomass material and partner contributions. Niagara has identified a value to the grid support capabilities of the dispersed generation.
Date:
February 1, 1999
Creator:
Cooper, James T.
Object Type:
Report
System:
The UNT Digital Library
Breaking Ground, Volume 4, Number 2, February 1999
Newsletter of the Texas Department of Housing and Community Affairs discussing news and announcements related to the agency and other information regarding community resources and affordable housing in the state.
Date:
February 1999
Creator:
Texas. Department of Housing and Community Affairs.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Brookhaven National Laboratory Site Environmental Report for Calendar Year 1997.
None
Date:
February 1, 1999
Creator:
Lee, R. J.; Naidu, J. R.; Schroeder, G. L.; Paquette, D. E.; Scarpitta, S. & AL, ET
Object Type:
Report
System:
The UNT Digital Library
Calculation of hydrogen and oxygen uptake in fuel rod cladding during severe accidents using the integral diffusion method -- Preliminary design report
Preliminary designs are described for models of hydrogen and oxygen uptake in fuel rod cladding during severe accidents. Calculation of the uptake involves the modeling of seven processes: (1) diffusion of oxygen from the bulk gas into the boundary layer at the external cladding surface, (2) diffusion from the boundary layer into the oxide layer, (3) diffusion from the inner surface of the oxide layer into the metallic part of the cladding, (4) uptake of hydrogen in the event that the cladding oxide layer is dissolved in a steam-starved region, (5) embrittlement of cladding due to hydrogen uptake, (6) cracking of cladding during quenching due to its embrittlement and (7) release of hydrogen from the cladding after cracking of the cladding. An integral diffusion method is described for calculating the diffusion processes in the cladding. Experimental results are presented that show a rapid uptake of hydrogen in the event of dissolution of the oxide layer and a rapid release of hydrogen in the event of cracking of the oxide layer. These experimental results are used as a basis for calculating the rate of hydrogen uptake and the rate of hydrogen release. The uptake of hydrogen is limited to the equilibrium …
Date:
February 1, 1999
Creator:
Siefken, L. J.
Object Type:
Report
System:
The UNT Digital Library
Carbon Dioxide Extraction from Air: Is It An Option?
Controlling the level of carbon dioxide in the atmosphere without limiting access to fossil energy resources is only possible if carbon dioxide is collected and disposed of away from the atmosphere. While it may be cost-advantageous to collect the carbon dioxide at concentrated sources without ever letting it enter the atmosphere, this approach is not available for the many diffuse sources of carbon dioxide. Similarly, for many older plants a retrofit to collect the carbon dioxide is either impossible or prohibitively expensive. For these cases we investigate the possibility of collecting the carbon dioxide directly from the atmosphere. We conclude that there are no fundamental obstacles to this approach and that it deserves further investigation. Carbon dioxide extraction directly from atmosphere would allow carbon management without the need for a completely changed infrastructure. In addition it eliminates the need for a complex carbon dioxide transportation infrastructure, thus at least in part offsetting the higher cost of the extraction from air.
Date:
February 1, 1999
Creator:
Lackner, Klaus; Ziock, Hans-Joachim & Grimes, Patrick
Object Type:
Article
System:
The UNT Digital Library
A Characterization and Evaluation of Coal Liquefaction Process Streams
This is the Technical Progress Report for the sixteenth quarter of activities under DOE Contract No. DE-AC22-94PC93054. It covers the period April 1 through June 30, 1998. Described in this report are the following activities: (1) CONSOL characterized nine process stream samples received from Exxon Recycle Coal Liquefaction Unit (RCLU) operations conducted in 1994 with Rawhide Mine Wyoming subbituminous coal and all-dispersed Fe and Mo catalysts. (2) The University of Delaware subcontract related to resid reactivity was completed with issuance of the Topical Report covering work performed by Delaware. (3) Computational studies of the coal liquefaction resid models developed at the University of Delaware were continued at CONSOL R and D. The two reaction models, consisting of the reaction optimization and reaction once-through programs, were the focus of these studies. The updated resid structure data and results were used in the reaction models to predict percent conversion values that were compared with the experimentally-measured values from the University of Delaware. (4) Small samples of high-sulfur Hondo resid and anthracene oil were shipped to John Verkade of Iowa State University at his request. Verkade is testing a desulfurization method.
Date:
February 1, 1999
Creator:
Robbins, G. A.; Brandes, S. D.; Pazuchanics, D. J.; Nichols, D. G. & Winschel, R. A.
Object Type:
Report
System:
The UNT Digital Library
The Christian Chronicle (Oklahoma City, Okla.), Vol. 56, No. 2, Ed. 1, February 1999
Monthly newspaper from Oklahoma City, Oklahoma that includes news and information about the Churches of Christ along with advertising.
Date:
February 1999
Creator:
McBride, Bailey & Shipp, Glover
Object Type:
Newspaper
System:
The Portal to Texas History
A collapse surface for a perforated plate with an equilateral triangular array of penetrations
This paper describes the development of incipient yield and subsequent collapse surfaces for a plate containing a large number of small circular penetrations arranged in an equilateral triangular array. The collapse surface developed here is appropriate for formulating a generic elastic-plastic flow theory for perforated materials. A unit cell is defined to characterize the mechanical response of an equilateral triangular array of penetrations. An elastic-perfectly plastic [EPP] finite element analysis [FEA] computer program is used to calculate the EPP response of the unit cell. A sufficient number of load cases are solved to define the complete incipient yield and collapse surfaces for the unit cell. A fourth order yield function is defined by squaring the Von Mises quadratic yield function and retaining only those terms that are required for the symmetry dictated by the triangular array. Curve fitting is used to determine the coefficients of the fourth order function to match the incipient yield and collapse data calculated for the unit cell by FEA. The incipient yield function in the plane of the plate incorporating the penetration pattern is shown to be almost rhomboidal in shape while the collapse curve is more elliptical. The fourth order yield function which passes …
Date:
February 1, 1999
Creator:
Gordon, J.L.; Jones, D.P.; Hutula, D.N. & Banas, D.
Object Type:
Article
System:
The UNT Digital Library
Combustion Tests of Rocket Motor Washout Material: Focus on Air toxics Formation Potential and Asbestos Remediation
The objective of this investigation is to determine the suitability of cofiring as a recycle / reuse option to landfill disposal for solid rocket motor washout residue. Solid rocket motor washout residue (roughly 55% aluminum powder, 40% polybutadiene rubber binder, 5% residual ammonium perchlorate, and 0.2-1% asbestos) has been fired in Sandia's MultiFuel Combustor (MFC). The MFC is a down-fired combustor with electrically heated walls, capable of simulating a wide range of fuel residence times and stoichiometries. This study reports on the fate of AP-based chlorine and asbestos from the residue following combustion.
Date:
February 1, 1999
Creator:
Sclippa, G. C.; Baxter, L. L. & Buckley, S. G.
Object Type:
Report
System:
The UNT Digital Library
A Comparison of High-Voltage Switches
This report summarizes our work on high-voltage switches during the past few years. With joint funding from the Department of Energy (DOE) and the Department of Defense (DOD), we tested a wide variety of switches to a common standard. This approach permitted meaningful comparisons between disparate switches. Most switches were purchased from commercial sources, though some were experimental devices. For the purposes of this report, we divided the switches into three generic types (gas, vacuum, and semiconductor) and selected data that best illustrates important strengths and weaknesses of each switch type. Test techniques that indicate the state of health of the switches are emphasized. For example, a good indicator of residual gas in a vacuum switch is the systematic variation of the switching delay in response to changes in temperature and/or operating conditions. We believe that the presentation of this kind of information will help engineers to select and to test switches for their particular applications. Our work was limited to switches capable of driving slappers. Also known as exploding-foil initiators, slappers are detonators that initiate a secondary explosive by direct impact with a small piece of matter moving at the detonation velocity (several thousands of meters per second). A …
Date:
February 1, 1999
Creator:
Chu, K. W. & Scott, G. L.
Object Type:
Report
System:
The UNT Digital Library
Competing structures in nuclei near closed shells. Final report, September 1, 1993--November 30, 1996
This report summarizes the progress made during this period. A series of experiments on levels in {sup 144}Nd have led to the identification of quadrupole-octupole coupled states in the nucleus. These experiments included the measurement of excited level lifetimes using the GRID technique, the measurement of transition conversion coefficients and the measurement of weak transition intensities. A fast electronic timing system has been set-up at Tennessee Tech. This system can be used to measure nuclear excited state lifetimes in the range from 5 ps upward. A new variation of the centroid shift method has been developed which eliminates the need to determine a prompt position. This centroid difference method employs both forward and reverse gating of gamma cascades to generate two timing spectra.
Date:
February 1, 1999
Creator:
Robinson, S.J.
Object Type:
Report
System:
The UNT Digital Library
Comprehensive Testing to Measure the Response of Liner Materials to Hanford Tank Waste Simulant
None
Date:
February 1, 1999
Creator:
Nigrey, P. J. & Dickens, T. G.
Object Type:
Report
System:
The UNT Digital Library
Condensation pressures in small pores: An analytical model based on density functional theory
Adsorption and condensation are critical to many applications of porous materials including filtration, separation, and the storage of gases. Integral methods are used to derive an analytical expression describing fluid condensation pressures in slit pores bounded by parallel plane walls. To obtain this result, the governing equations of Density Functional Theory (DFT) are integrated across the pore width assuming that fluid densities within adsorbed layers are spatially uniform. The thickness, density, and energy of these layers are expressed as composite functions constructed from asymptotic limits applicable to small and large pores. By equating the total energy of the adsorbed layers to that of a liquid-full pore, the authors arrive at a closed-form expression for the condensation pressure in terms of the pore size, surface tension, and Lennard-Jones parameters of the adsorbent and adsorbate molecules. The resulting equation reduces to the Kelvin equation in the large-pore limit. It further reproduces the condensation pressures computed by means of the full DFT equations for all pore sizes in which phase transitions are abrupt. Finally, in the limit of extremely small pores, for which phase transitions may be smooth and continuous, this simple analytical expression provides a good approximation to the apparent condensation pressure …
Date:
February 1, 1999
Creator:
Nilson, R. H. & Griffiths, S. K.
Object Type:
Report
System:
The UNT Digital Library
Congressional Record: Proceedings and Debates of the 106th Congress, First Session, Volume 145, Part 2
The Congressional Record contains the records for sessions of the U.S. Congress including summaries of proceedings, letters, and speeches for the Senate and House of Representatives.
Date:
February 1999
Creator:
United States. Congress.
Object Type:
Book
System:
The UNT Digital Library
Corrective Action Investigation Plan for the CNTA Subsurface Sites (CAU Number 443), Revision 1
This Corrective Action Investigation Plan (CAIP) describes the U.S. Department of Energy's (DOE's) planned environmental investigation of the subsurface Central Nevada Test Area (CNTA) Corrective Action Unit (CAU) No. 443. The CNTA is located in Hot Creek Valley in Nye County, Nevada, adjacent to U.S. Highway 6, about 48 kilometers (km) (30 miles [mi]) north of Warm Springs, Nevada. The CNTA was the site of Project Faultless, a nuclear device detonated in the subsurface by the U.S. Atomic Energy Commission (AEC) in January 1968. The purposes of this test were to gauge the seismic effects of a relatively large, high-yield detonation completed in Hot Creek Valley (outside the Nevada Test Site) and to determine the suitability of the site for future large detonations. The yield of the Faultless test was between 200 kilotons and 1 megaton. Two similar tests were planned for the CNTA, but neither of them was completed. Based on the general definition of a corrective action investigation (CAI) from Section IV.14 of the Federal Facility Agreement and Consent Order (FFACO), the purpose of the CAI is ''to gather data sufficient to characterize the nature, extent, and rate of migration or potential rate of migration from releases or …
Date:
February 1, 1999
Creator:
United States. Department of Energy. Nevada Operations Office.
Object Type:
Report
System:
The UNT Digital Library
Crushed Salt Constitutive Model
The constitutive model used to describe the deformation of crushed salt is presented in this report. Two mechanisms -- dislocation creep and grain boundary diffusional pressure solution -- are combined to form the basis for the constitutive model governing the deformation of crushed salt. The constitutive model is generalized to represent three-dimensional states of stress. Upon complete consolidation, the crushed-salt model reproduces the Multimechanism Deformation (M-D) model typically used for the Waste Isolation Pilot Plant (WIPP) host geological formation salt. New shear consolidation tests are combined with an existing database that includes hydrostatic consolidation and shear consolidation tests conducted on WIPP and southeastern New Mexico salt. Nonlinear least-squares model fitting to the database produced two sets of material parameter values for the model -- one for the shear consolidation tests and one for a combination of the shear and hydrostatic consolidation tests. Using the parameter values determined from the fitted database, the constitutive model is validated against constant strain-rate tests. Shaft seal problems are analyzed to demonstrate model-predicted consolidation of the shaft seal crushed-salt component. Based on the fitting statistics, the ability of the model to predict the test data, and the ability of the model to predict load paths …
Date:
February 1, 1999
Creator:
Callahan, G. D.
Object Type:
Report
System:
The UNT Digital Library
Decontamination and inspection plan for Phase 3 closure of the 300 area waste acid treatment system
This decontamination and inspection plan (DIP) describes decontamination and verification activities in support of Phase 3 closure of the 300 Area Waste Acid Treatment System (WATS). Phase 3 is the third phase of three WATS closure phases. Phase 3 attains clean closure conditions for WATS portions of the 334 and 311 Tank Farms (TF) and the 333 and 303-F Buildings. This DIP also describes designation and management of waste and debris generated during Phase 3 closure activities. Information regarding Phase 1 and Phase 2 for decontamination and verification activities closure can be found in WHC-SD-ENV-AP-001 and HNF-1784, respectively. This DIP is provided as a supplement to the closure plan (DOE/RL-90-11). This DIP provides the documentation for Ecology concurrence with Phase 3 closure methods and activities. This DIP is intended to provide greater detail than is contained in the closure plan to satisfy Ecology Dangerous Waste Regulations, Washington Administrative Code (WAC) 173-303-610 requirement that closure documents describe the methods for removing, transporting, storing, and disposing of all dangerous waste at the unit. The decontamination and verification activities described in this DIP are based on the closure plan and on agreements reached between Ecology and the U.S. Department of Energy, Richland Operations …
Date:
February 1, 1999
Creator:
LUKE, S.N.
Object Type:
Report
System:
The UNT Digital Library