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34,004 Matching Results
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Geology of the 241-TY Tank Farm
A series of maps have been compiled to document the structure and stratigraphy of the sediments underlying the high-level radioactive waste storage tank farms located within the ERDA Hanford Reservation. The primary purpose of these maps is to provide basic geologic information to be utilized to evaluate the impact of suspected and confirmed tank leaks.
Date:
April 1, 1976
Creator:
Price, W. H. & Fecht, K. R.
Object Type:
Report
System:
The UNT Digital Library
Axicell design for the end plugs of MFTF-B
Certain changes in the end-plug design in the Mirror Fusion Test Facility (MFTF-B) are described. The Laboratory (LLNL) proposes to implement these changes as soon as possible in order to construct the machine in an axicell configuration. The present physics and technology goals as well as the project cost and schedule will not be affected by these changes.
Date:
April 23, 1982
Creator:
Thomassen, K.I. & Karpenko, V.N.
Object Type:
Report
System:
The UNT Digital Library
Prediction of temperature increases in a salt repository expected from the storage of spent fuel or high-level waste
Comparisons in temperature increases incurred from hypothetical storage of 133 MW of 10-year-old spent fuel (SF) or high-level waste (HLW) in underground salt formations have been made using the HEATING5 computer code. The comparisons are based on far-field homogenized models that cover areas of 65 and 25 sq miles for SF and HLW, respectively, and near-field unit-cell models covering respective areas of 610 ft/sup 2/ and 400 ft/sup 2/. Preliminary comparisons based on heat loads of 150 kW/acre and 3.5 kW/canister indicated near-field temperature increases about 20% higher for the storage of the spent fuel than for the high-level waste. In these comparisons, it was also found that the thermal energy deposited in the salt after 500 years is about twice the energy deposited by the high-level waste. The thermal load in a repository containing 10-year-old spent fuel was thus limited to 60 kW/acre to obtain comparable far-field thermal effects as obtained in a repository containing 10-year-old high-level waste loaded at 150 kW/acre. Detailed far-field and unit-cell comparisons of transient temperature increases have been made based on these loadings. Unit-cell comparisons were made between a canister containing high-level waste with an initial heat production rate of 2.1 kW and a …
Date:
April 1, 1978
Creator:
Llewellyn, G.H.
Object Type:
Report
System:
The UNT Digital Library
Crystallographic D-Space Computer Program
D-Space is a computer program which generates indices (hld), tests for space-group extinctions, and calculates d,'' 1/d/sup 2/, sin theta , sin/sup 2/ theta , sin theta / lambda , sin/sub 2/ theta / lambda /sup 2/, theta , and 2 theta for any crystal system and space group, requiring only the unit cell constants as data input. Optional calculations are the single-crystal angle settings, phi and chi, and various Lorentz and Lorentz-polarization corrections. (auth)
Date:
April 1962
Creator:
Mueller, M. H.; Meyer, E. F. H. & Simonsen, S. H.
Object Type:
Report
System:
The UNT Digital Library
New fission-neutron-spectrum representation for ENDF
A new representation of the prompt fission neutron spectrum is proposed for use in the Evaluated Nuclear Data File (ENDF). The proposal is made because a new theory exists by which the spectrum can be accurately predicted as a function of the fissioning nucleus and its excitation energy. Thus, prompt fission neutron spectra can be calculated for cases where no measurements exist or where measurements are not possible. The mathematical formalism necessary for application of the new theory within ENDF is presented and discussed for neutron-induced fission and spontaneous fission. In the case of neutron-induced fission, expressions are given for the first-chance, second-chance, third-chance, and fourth-chance fission components of the spectrum together with that for the total spectrum. An ENDF format is proposed for the new fission spectrum representation, and an example of the use of the format is given.
Date:
April 1, 1982
Creator:
Madland, D.G.
Object Type:
Report
System:
The UNT Digital Library
Influence of nitrogen on the sensitization, corrosion, mechanical, and microstructural properties of austenitic stainless steels. First annual progress report
During this first year of the project, the research effort has concentrated on the electrochemical aspects of the effect of nitrogen on austenitic steels. The status of all the individual project tasks are outlined briefly, and then more detailed results of the electrochemical studies conducted so far are reported. Highlights of this quarter are: (1) nitrogen additions of up to 0.16 wt % retard sensitization of 18Cr-8Ni austenitic stainless steels. However, nitrogen additions to levels above approx. 0.25 wt % promote sensitization; (2) the retardation of sensitization by nitrogen can possibly be explained as being due to retardation of the nucleation or rate of growth of chromium carbides; and (3) polarization studies in high temperature 0.01 M Na/sub 2/SO/sub 4/ solutions at 250/sup 0/C demonstrate that the sensitized alloys are electrochemically more active than the solution annealed materials thereby indicating that they are susceptible to intergranular attack.
Date:
April 1, 1982
Creator:
Clark, W.A.T. & Macdonald, D.D.
Object Type:
Report
System:
The UNT Digital Library
Stepwise development of algorithms for the nonlinear projection methods
None
Date:
April 1, 1975
Creator:
Georg, D.D. & Keller, R.F.
Object Type:
Report
System:
The UNT Digital Library
Photodegradation of mutagens in solvent-refined coal liquids
The purpose of this investigation was to evaluate any changes in the chemical composition and microbial mutagenicities of two representative solvent-refined coal (SRC) liquids as a function of exposure time to sunlight and air. This information was desired to assess potential health hazards arising from ground spills of these liquids during production, transport and use. Results of microbial mutagenicity assays using Salmonella typhimurium TA98, conducted after exposure, showed that the mutagenicities of both an SRC-II fuel oil blend and an SRC-I process solvent decreased continuously with exposure time to air and that the decrease was accelerated by simultaneous exposure to simulated sunlight. The liquids were exposed as thin layers supported on surfaces of glass, paper, clay or aluminum; but the type of support had little effect on the results. The contrast between these results and the reported increases of mutagenesis in organisms exposed simultaneously to coal liquids and near-ultraviolet light suggested that short-lived mutagenic intermediates, e.g., organic free radicals, were formed in the liquids during exposure to light. The highest activities of microbial mutagenicity in the SRC liquids were found in fractions rich in amino polycyclic aromatic hydrocarbons (amino PAH). After a 36-hour exposure of the fuel oil blend to …
Date:
April 1, 1984
Creator:
Kalkwarf, D. R.; Stewart, D. L.; Pelroy, R. A. & Weimer, W. C.
Object Type:
Report
System:
The UNT Digital Library
Monitoring the materials and chemistry of a geothermal plant
The components of geothermal brines that cause corrosion and scaling problems are reviewed, especially brine pH, CO/sub 2/, H/sub 2/S, oxygen (from air), silicia, calcium, sulfides, and suspended particulates. Instrumental methods for on-line measurement are discussed to show how to keep costs low by operating a geothermal plant from a position of knowledge of what is occurring to the plant materials. The US Department of Energy research and development program in brine chemistry and on-line instrument development at Pacific Northwest Laboratory is discussed along with the strategy for commercial availability of new instruments to the geothermal industry.
Date:
April 1, 1988
Creator:
Shannon, D.W.
Object Type:
Article
System:
The UNT Digital Library
Optimization of steam explosion pretreatment. Final report
Different operating conditions are required to optimize the yield from each of the various fractions in the substrate. Xylose recovery is maximized at short cooking times whereas maximum lignin recovery requires much longer cooking times. Peak glucose yield and rumen digestibility occur at intermediate times. If process conditions are set for maximum glucose yield we have achieved a yield of 68% of the theoretical, based on an average of a dozen substrates tested. Individual results ranged from 46 to 87%. If the process is optimized for maximum total sugars (i.e. glucose plus xylose) we have obtained an average yield of 60%, with a range of 31 to 75%. With rumen microflora, the average value of the in-vitro cellulose digestibility was 82%, with a range of 41 to 90%. The optimum operating conditions for total sugars are a pressure of 500 to 550 psig with a cooking time of 40 to 50 seconds and 35% starting moisture content. Particle size is not a significant factor, nor is pre-steaming or use of a constricting die in the gun nozzle. High quality lignin can be extracted with 80% yield. The Iotech lignin is very soluble, has a low molecular weight and is reactive. …
Date:
April 1, 1980
Creator:
Foody, P.
Object Type:
Report
System:
The UNT Digital Library
Radiation Problems Associated With the Handling of the Actinide Elements
The hazards connected with the handling of actinide elements are surveyed. Emphasis is placed on Th, U, Np, and Pu. It is pointed out that the chemical toxicity of the actinides is usually minor when compared with radiochemi cal toxicity. Inhalation and ingestion are the important routes of entry but direct injection into the blood stream through wounds also requires consideration. Special enclosures, such as glove boxes, function primarily to minimize the risk of inhalation and aid in confinement. The external hazard from actinide elements, primarily due to gamma and fast neutron emission, varies considerably with the element and its source. Irradiated actinides, such as Th and Pu, usually show an increase in the external hazard from gamma radiation with extent of irradiation. (C.H.)
Date:
April 1, 1962
Creator:
Steindler, M.J.
Object Type:
Report
System:
The UNT Digital Library
Current nuclear industry practices with regard to the integration of surveillances
Commercial nuclear industry practices regarding the integration of technical specification (TS) surveillance and maintenance activities are identified in this report. A questionnaire was developed and used to obtain current industry practices from NRC Regional personnel and INEL engineers with utility experience. Some of these practices indicate that the scheduling of TS surveillance and maintenance items could be more effectively coordinated. Also, must utilities do not formally consider risk implications when they are scheduling maintenance. Methodologies and approaches for proposing and evaluating changes to improve the integration of TS surveillance and maintenance activities have been identified for planned future work.
Date:
April 1, 1992
Creator:
Stewart, M. & Smith, C.
Object Type:
Report
System:
The UNT Digital Library
Wildlife Protection, Mitigation, and Enhancment Plan: Minidoka Dam: Final Report.
A wildlife protection, mitigation, and enhancement plan has been developed for the US Bureau of Reclamation's Minidoka Dam and Reservoir in south-central Idaho. Specific objectives of this study included the following: Develop protection, mitigation, and enhancement goals and objectives for target wildlife species; identify potential protection, mitigation, and enhancement opportunities to achieve the mitigation objectives; and coordinate project activities with agencies, tribes, and the public. The interagency work group previously assessed the impacts of Minidoka Dam on wildlife. There were estimated losses of 10,503 habitat units (HU's) for some target wildlife species and gains of 5,129 HU's for other target species. The work group agreed that mitigation efforts should be directed toward target species that were negatively impacted by Minidoka Dam. They developed the following prioritized mitigation goals: 1,531 river otter HU's in riparian/river habitat, 1,922 sage grouse HU's in shrub-steppe (sagebrush-grassland) habitat, 1,746 mule deer HU's in shrub-steppe habitat, and 175 yellow warbler HU's in deciduous scrub-shrub wetland habitat. The work group proposed the following preferred mitigation options, in priority order: Provide benefits of 1,706 river otter and yellow warbler HU's by protecting and enhancing riparian/river habitat in south central Idaho; and provide benefits of 3,668 sage grouse and …
Date:
April 1, 1991
Creator:
Meuleman, G. Allyn; Martin, Robert C. & Hansen, H. Jerome
Object Type:
Report
System:
The UNT Digital Library
Simulation of ethylbenzene dehydrogenation in microporous catalytic membrane reactors
Current state-of-the-art inorganic oxide membranes offer the potential of being modified to yield catalytic properties. The resulting modules may be configured to simultaneously induce catalytic reactions with product concentration and separation in a single processing step. Processes utilizing such catalytically active membrane reactors have the potential for dramatically increasing yield of reactions which are currently limited by either thermodynamic equilibria, product inhibition, or kinetic selectivity. Examples of systems of commercial interest include hydrogenation, dehydrogenation, partial and selective oxidation, hydrations, hydrocarbon cracking, olefin metathesis, hydroformylation, and olefin polymerization. A large portion of the most significant reactions fall into the category of high temperature, gas phase chemical and petrochemical processes. Microporous oxide membranes are well suited for these applications. A program is proposed to investigate selected model reactions of commercial interest (i.e., dehydrogenation of ethylbenzene to styrene and dehydrogenation of butane to butadiene) using a high temperature catalytic membrane reactor. Membranes will be developed, reaction dynamics characterized, and production processes developed, culminating in laboratory-scale demonstration of technical and economic feasibility. As a result of the anticipated increased yield per reactor pass, large economic incentives are envisioned. First, a large decrease in the temperature required to obtain high yield should be possible because …
Date:
April 1, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Feasibility of a continuous surface mining machine using impact breakers. Phase I report, 1 October 1979-31 March 1980
This is the first phase report of the efforts to evaluate the feasibility of excavating coal and overburden from surface mines using impact breakers. Phase I is divided into four task groups. Those tasks are as follows: Selection of Field Sites for Parametric, Selection of Impact Hammers for Field, Design Test System, and Prepare Parametric Test Plan. A detailed description and accounting of each task is given in the body of this report. Included as appendices are the FMA internal reports on the individual mines visited. These reports are the basis of test site selection. The basic finding of this phase are that industry interest in the concept of impact mining tends toward the removal of multiple thin seams of coal and parting rather than deep coal or overburden and, while the intent of this contract is to explore the feasibility of impactors in a vertical array for use in a terraced mine plan, future design of a continuous mining machine should take industry acceptance into account.
Date:
April 1, 1980
Creator:
Fisk, A. T. & Simpson, R. J.
Object Type:
Report
System:
The UNT Digital Library
Modeling of Integrated Environmental Control Systems for Coal-Fired Power Plants Quarterly Report: January-March 1989
This is the sixth quarterly report of DOE Contract No. DE-AC22- 87PC79863, entitled Modeling of Integrated Environmental Control Systems for Coal-Fired Power Plants.'' This report summarizes accomplishments during the period January 1, 1989 to March 31, 1989. Efforts this past quarter focused primarily on the preparation of a computer User's Guide for the Integrated Environmental Control Model (IECM). Drafts of the first two chapters are now complete. These chapters constitute the bulk of this quarterly report. Drafts of the remaining chapters are in preparation, and will appear in a future report this year. We also have been working closely with DOE/PETC to define the computer configuration to be transferred to PETC as a contract deliverable. That process is now complete and the equipment is on order. Delivery of the IECM to PETC is expected during the next calendar quarter. Finally, we are continuing our efforts to develop and refine a number of clean coal technology process models. These efforts will be summarized and reported at a future date.
Date:
April 1, 1989
Creator:
Rubin, E. S.
Object Type:
Report
System:
The UNT Digital Library
Choosing and implementing a computer system for plant lubrication: Nine steps to success
Rapid advances in computer software offer may opportunities for increasing efficiency and productivity; however, choosing the right software package and achieving its full potential can be a challenging task. Lubrication engineers faced with the selection and implementation of a computer system will find that they can increase their chance of success when they follow the nine steps outlined in this paper. These steps provide a solid framework for managing the project through its full life-cycle from initial conception until final retirement of the system. Lubrication Departments that already have computer systems in place can also benefit from these steps by picking up at the corresponding point in the system's life and following the remaining steps.
Date:
April 3, 1991
Creator:
Nook, J. C.
Object Type:
Report
System:
The UNT Digital Library
A FORTRAN Program for Calculating Single Crystal Absorption Corrections
A Fortran program is described for calculating the absorption correction for application to single crystal x ray or neutron intensity measurements. The program is available in the form of symbolic punched cards. InstrucPions are included. (J.R.D.)
Date:
April 1, 1962
Creator:
Wehe, D. J.; Busing, W. R. & Levy, H. A.
Object Type:
Report
System:
The UNT Digital Library
Geothermal energy. A bibliography with abstracts. Period covered: 1964--April 1975
None
Date:
April 1, 1975
Creator:
Smith, M.F.
Object Type:
Report
System:
The UNT Digital Library
Facile reaction/extraction of coal with supercritical fluids. Quarterly technical progress report, January 1-March 31, 1984
Arylmethyl phenyl ethers undergo competing reactions when treated with Lewis acids in benzene solvent. Apparently, benzene is insufficiently reactive to compete with intramolecular (intrapolymer) nucleophiles and, consequently, no increase in solubility accompanies the cleavages of ether links upon addition of benzene. When better nucleophiles, naphthalene and phenanthene, are provided, carbonium ions generated from ether cleavages are capped and the product is lower in molecular weight and more soluble. It is worth noting that the naphthalene (k/sub rel/ = 300) is nearly as good a trap as the phenol (k/sub rel/ = 450). Since hydroxylic solvents will level the acid strength of BF/sub 3/ to that of ROBF/sub 3//sup -/H/sup +/ and hydrocarbons would not, the acid-catalyzed bond cleavages necessary for unlinking coal may in fact be faster in BF/sub 3/-arene than in BF/sub 3/-phenol. While we have not yet extended these results to coals, we believe that the combination of a relatively mild Lewis acid catalyst, BF/sub 3/, with a good carbonium ion trap, naphthalene, will allow selective cleavage and capping of aryl alkyl ether bonds. 3 references, 2 figures, 3 tables.
Date:
April 20, 1984
Creator:
Venier, C. G. & Squires, T. G.
Object Type:
Report
System:
The UNT Digital Library
Effects of temperature on the absolute permeability of consolidated sandstone
The effect of temperature on absolute permeability has been a point of disagreement in the petroleum literature for many years. Recent work at Stanford University has shown no dependence on temperature of the absolute permeability to water of unconsolidated sand cores. The objective of this report is to extend the investigation to consolidated sandstone by following similar experimental procedures and observing whether any temperature effects exist. Fontainebleau sandstone was chosen as the core sample because of its low porosity and relatively clay-free composition. These characteristics allow the nature of consolidated sandstone permeability to be studied, while minimizing the effects of extraneous factors. Such factors, often present in Berea and Boise sandstones, include interstitital clay swelling in the presence of distilled water. Properties of sandstone differ from those of unconsolidated sand. Consequently, the effects of throughput water volume and flow rate, in addition to temperature, are studied. Mechanical difficulties with parts of the experimental apparatus have prevented the development of a satisfactory conclusion based on results obtained thus far. Recommendations are provided for necessary modifications before further experiments are performed. When these changes are implemented, a final run can be made to complete the analysis. 19 references, 10 figures.
Date:
April 1, 1984
Creator:
McKay, W.I. & Brigham, W.E.
Object Type:
Report
System:
The UNT Digital Library
PPBS in 1970: Methodology and Implementation, An Annotated Bibliography
This report provides an annotated bibliography of resources related to the Federal Planning-Programming-Budgeting System (PPBS) focused on its methodology and structure.
Date:
April 16, 1970
Creator:
Chartrand, Robert L. & Becker, Louise G.
Object Type:
Report
System:
The UNT Digital Library
The Operation and Procedures of the Selective Service System
This report provides information about the operation and procedures of the Selective Service System on both the national and local board level.
Date:
April 20, 1970
Creator:
Buchan, Lois
Object Type:
Report
System:
The UNT Digital Library
Deployment of the Anti-Ballistic Missile (ABM): The Pros and Cons
This report is about the pros an cons of deploying an anti-ballistic missile system (ABM) for defense against missile attack.
Date:
April 19, 1967
Creator:
Bussey, Donald S.
Object Type:
Report
System:
The UNT Digital Library