UNT Libraries Government Documents Department - 93 Matching Results

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The Abandoned Mine Land Fund: Grants Distribution and Issues

Description: The Surface Mining Control and Reclamation Act (SMCRA, P.L. 95-87), enacted in 1977, established reclamation standards for all coal surface mining operations, and for the surface effects of underground mining. It also established the Abandoned Mine Land (AML) program to promote the reclamation of sites mined and abandoned prior to the enactment of SMCRA. To finance reclamation of abandoned mine sites, the legislation established fees on coal production. These collections are divided into federa… more
Date: March 26, 1997
Creator: Bamberger, Robert L.
Item Type: Refine your search to only Report
open access

Acrylic vessel cleaning tests

Description: The acrylic vessel as constructed is dirty. The dirt includes blue tape, Al tape, grease pencil, gemak, the glue or residue form these tapes, finger prints and dust of an unknown composition but probably mostly acrylic dust. This dirt has to be removed and once removed, the vessel has to be kept clean or at least to be easily cleanable at some future stage when access becomes much more difficult. The authors report on the results of a series of tests designed: (a) to prepare typical dirty sampl… more
Date: February 26, 1997
Creator: Earle, D.; Hahn, R.L.; Boger, J. & Bonvin, E.
Item Type: Refine your search to only Report
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Assessment of Alternative RF Linac Structures for APT

Description: The APT program has been examining both normal and superconducting variants of the APT linac for the past two years. A decision on which of the two will be the selected technology will depend upon several considerations including the results of ongoing feasibility experiments, the performance and overall attractiveness of each of the design concepts, and an assessment of the system-level features of both alternatives. The primary objective of the Assessment of Alternative RF Linac Structures fo… more
Date: March 26, 1997
Item Type: Refine your search to only Report
open access

Attrition Resistant Iron-Based Fischer-Tropsch Catalysts

Description: The Fischer-Tropsch (F-T) reaction provides a way of converting coal-derived synthesis gas (CO+H{sub 2}) to liquid fuels. Since the reaction is highly exothermic, one of the major problems in control of the reaction is heat removal. Recent work has shown that the use of slurry bubble column reactors (SBCRS) can largely solve this problem. Iron-based (Fe) catalysts are preferred catalysts for F-T when using low CO/H{sub 2} ratio synthesis gases derived from modem coal gasifiers. This is because … more
Date: March 26, 1997
Creator: Jothimurugesan, K.; Goodwin, J. G.; Spivey, J. J. & Gangwal, S. K.
Item Type: Refine your search to only Report
open access

Calculation of 1.25% 235U enriched UO2 solution safe slab, safe cylinder diameter, minimum safe mass, and ion exchange module for the CVDF

Description: Support calculations were performed to establish safe parameters such as fissionable material slab thickness, diameter and safe mass. These calculations were performed by MCNP for the balance of plant equipment that contains homogeneous UO{sub 2} solutions with a maximum enrichment of 1.25 Wt% {sup 235}U . The calculations were performed with the most limiting concentration of moderator and reflection so that only the safety parameters identified in the problem description need to be controlled… more
Date: June 26, 1997
Creator: Roblyer, S.P.
Item Type: Refine your search to only Report
open access

Computational model of a copper laser

Description: This report describes a computational model of a copper laser amplifier. The model contains rate equations for copper and the buffer gas species (neon and hydrogen), along with equations for the electron temperature, the laser intensity, and the diffusing magnetic field of the discharge. Rates are given for all pertinent atomic reactions. The radial profile of the gas temperature is determined by the time-averaged power deposited in the gas. The presence of septum inserts, which aid gas cooling… more
Date: March 26, 1997
Creator: Boley, C. D.; Molander, W. A. & Warner, B. E.
Item Type: Refine your search to only Report
open access

Construction safety management guide for use with DOE Order 440.1

Description: DOE Order (DOE O) 440.1, Worker Protection Management for DOE Federal and Contractor Employees, establishes the framework for an effective worker protection program to reduce or eliminate accidental losses, injuries, and illnesses by providing workers with places of employment free of recognized hazards. In addition to prescribing program requirements applicable to all activities performed by DOE and its contractors, DOE O 440.1 provides specific requirements applicable only to construction act… more
Date: June 26, 1997
Item Type: Refine your search to only Report
open access

Construction safety program for the National Ignition Facility, Appendix A

Description: Topics covered in this appendix include: General Rules-Code of Safe Practices; 2. Personal Protective Equipment; Hazardous Material Control; Traffic Control; Fire Prevention; Sanitation and First Aid; Confined Space Safety Requirements; Ladders and Stairways; Scaffolding and Lift Safety; Machinery, Vehicles, and Heavy Equipment; Welding and Cutting-General; Arc Welding; Oxygen/Acetylene Welding and Cutting; Excavation, Trenching, and Shoring; Fall Protection; Steel Erection; Working With Asbest… more
Date: June 26, 1997
Creator: Cerruti, S. J.
Item Type: Refine your search to only Report
open access

Corrective action decision document for the Roller Coaster Lagoons and North Disposal Trench (Corrective Action Unit Number 404)

Description: The North Disposal Trench, located north of the eastern most lagoon, was installed in 1963 to receive solid waste and construction debris from the Operation Roller Coaster man camp. Subsequent to Operation Roller Coaster, the trench continued to receive construction debris and range cleanup debris (including ordnance) from Sandia National Laboratories and other operators. A small hydrocarbon spill occurred during Voluntary Corrective Action (VCA) activities (VCA Spill Area) at an area associate… more
Date: March 26, 1997
Item Type: Refine your search to only Report
open access

Corrosion of Cermet Anodes During Low Temperature Electrolysis of Alumina: Final Report

Description: Successful development of inert anodes to replace carbon anodes in Hall cells has the potential benefits of lower energy consumption,lower operating costs, and reduced CO{sub 2} and CO emissions. Using inert anodes at reduced current density and reduced operating temperature (800 C) has potential for decreasing the corrosion rate of inert anodes. It may also permit the use of new materials for containment and insulation. This report describes the fabrication characteristics and the corrosion pe… more
Date: September 26, 1997
Creator: Kozarek, Robert L.; Ray, Siba P.; Dawless, Robert K. & LaCamera, Alfred F.
Item Type: Refine your search to only Report
open access

Crystal growth and roughening of solid D{sub 2}

Description: Near the triple point, growth shapes of vapor deposited hexagonal close packed D{sub 2} crystals reveal two crystal orientations contain facets which persist up to the melt. This observation is in contrast with previous experiments on rare gas solids and H{sub 2} where the highest T{sub r} measured is 0.8 T{sub tp}.
Date: March 26, 1997
Creator: Kozioziemski, B.J.; Collins, G.W. & Bernat, T.P.
Item Type: Refine your search to only Article
open access

Designs for a high power superconducting delay line

Description: Potential designs for a high power superconducting delay line of approximately 10 microsecs duration are described. The transmitted signal should have low dispersion and little attenuation to recapture the original signal. Such demands cannot be met using conventional metal conductors. This paper outlines a proposal for a new transmission line design using low temperature superconducting material which meets system specifications. The 25 omega line is designed to carry pulsed signals with an ap… more
Date: June 26, 1997
Creator: Chen, Y. J. & Caporaso, G.
Item Type: Refine your search to only Article
open access

Effects of symmetry on circular and linear magnetic dichroism in angle-resolved photoemission spectra of Gd/Y (0001) and Fe-Ni//Cu (001)

Description: We have observed circular and linear magnetic dichroism in angle- resolved photoemission spectra of 50-monolayer Gd film grown on Y(0001) and 6-monolayer Fe-Ni alloy films grown on Cu(001). The 4f level of Gd and the Fe 3p level of the Fe-Ni alloy were measured. A different geometry was used for the magnetic circular dichroism than was used to measure the magnetic linear dichroism. The geometries were chosen so that the shape of the magnetic circular dichroism is predicted to be equal to the sh… more
Date: March 26, 1997
Creator: Goodman, K. W.; Tobin, J. G.; Schumann, F. O.; Willis, R. F.; Gammon, J. W.; Pappas, D. P. et al.
Item Type: Refine your search to only Article
open access

Engineering Development of Advanced Physical Fine Coal Cleaing for Premium Fuel Applications

Description: The ash in six common bituminous coals, Taggart, Winifrede, Elkhorn No. 3, Indiana VII, Sunnyside and Hiawatha, could be liberated by fine grinding to allow preparation of clean coal meeting premium fuel specifications (< 1- 2 lb/ MBtu ash and <0.6 lb/ MBtu sulfur) by laboratory and bench- scale column flotation or selective agglomeration. Over 2,100 tons of coal were cleaned in the PDU at feed rates between 2,500 and 6,000 lb/ h by Microcel� column flotation and by selective agglomeration usin… more
Date: September 26, 1997
Creator: Smit, Frank J.; Schields, Gene L.; Jha, Mehesh C. & Moro, Nick
Item Type: Refine your search to only Report
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