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Fundamental studies of catalytic processing of synthetic liquids

Description: This project revolves around understanding the fundamental processes involved in the catalytic removal of harmful oxygenated organics present in coal liquids. We are modelling the complex type of sulfided Mo catalyst proposed for these reactions with simple single crystal surfaces. These display a controlled range and number of reaction sites and can be extensively characterized by surface science techniques. We then investigate the reaction pathways for representative simple oxygenates upon th… more
Date: January 22, 1992
Creator: Watson, P. R.
Partner: UNT Libraries Government Documents Department
open access

Effects of energetical particles on ballooning modes in high temperature tokamaks

Description: This report describes the work done by Science Applications International Corporation to study the effects of energetic particles on the microstability of a high temperature tokamak. The effects of an energetic population on ballooning modes in a large aspect ratio, shifted circular flux surface tokamak equilibrium are investigated with the newly developed gryokinetic numerical technique. The gryokinetic equations for the background ion and electron, as well as that of the energetic population … more
Date: January 22, 1992
Creator: Tsang, K.T.
Partner: UNT Libraries Government Documents Department
open access

Hydrogen generation in SRAT with nitric acid and late washing flowsheets

Description: Melter feed preparation processes, incorporating a final wash of the precipitate slurry feed to Defense Waste Processing Facility (DWPF) and a partial substitution of the SRAT formic acid requirement with nitric acid, should not produce peak hydrogen generation rates during Cold Chemical Runs (CCR's) and radioactive operation greater than their current, respective hydrogen design bases of 0.024 lb/hr and 1.5 lb/hr. A single SRAT bench-scale process simulation for CCR-s produced a DWPF equivalen… more
Date: October 22, 1992
Creator: Hsu, C.W.
Partner: UNT Libraries Government Documents Department
open access

Limits for the new DWPF melter off-gas jumper I. D

Description: In order to minimize solids deposition in the off-gas line between the primary film cooler and the quencher, Savannah River Laboratory (SRL) recommended earlier that a new DWPF melter off-gas jumper be built which would increase the off-gas velocity from less than 40 ft/s under the original design to at least 55 ft/s, excluding the melter air inleakage. Two design changes proposed for the new jumper were: (1) relocation of the entry point for the melter pressure control air from the current pos… more
Date: January 22, 1992
Creator: Choi, A.S.
Partner: UNT Libraries Government Documents Department
open access

Effect of Pb and air absorber thickness on [sup 137]Cs signal

Description: We present the results of a measurement to understand the effects of transverse misplacement of the [sup 137]Cs source tube inside the cast Pb plates of the SDC EMC calorimeter. The PMT current from a scintillator was measured as the [sup 137]Cs source was displaced by varying thicknesses of Pb, as well as varying thicknesses of air gap. At a nominal depth of 2 mm in Pb, we find a change in scintillator output of about 25%/mm, and about 10%/mm of air gap. The data are compared to a simple calcu… more
Date: October 22, 1992
Creator: Jankowski, D. J.; Lopiano, D. & Stanek, R.
Partner: UNT Libraries Government Documents Department
open access

Technical bases for the salt processing cell dilution strategy for the low nitrite process

Description: This document recommends an interim dilution strategy for the low nitrite precipitate hydrolysis process. A minimum carbon dioxide purge rate of 27 scan during feeding and for 15 minutes after feeding and a maximum precipitate slurry feed rate of 36 gpm are recommended. These recommendations provide an interim dilution strategy that will provide for the start of cold chemical runs and until additional offgas data is collected from the PHEF (Precipitate Hydrolysis Experimental Facility).
Date: October 22, 1992
Creator: Young, S.R.
Partner: UNT Libraries Government Documents Department
open access

Underground radionuclide migration at the Nevada Test Site

Description: This document reviews results from a number of studies concerning underground migration of radionuclides from nuclear test cavities at the Nevada Test Site (NTS). Discussed are all cases known to the Department of Energy's Hydrology and Radionuclide Migration Program where radionuclides have been detected outside of the immediate vicinity of nuclear test cavities that are identifiable as the-source of the nuclides, as well as cases where radionuclides might have been expected and were intention… more
Date: June 22, 1992
Creator: Nimz, G.J. (Lawrence Livermore National Lab., CA (United States)) & Thompson, J.L. (Los Alamos National Lab., NM (United States))
Partner: UNT Libraries Government Documents Department
open access

Bench-scale testing of on-line control of column flotation using a novel analyzer

Description: This document contains the first quarterly technical progress report for PTI's Bench-Scale Testing Project of a circuit integrating PTI's KEN-FLOTETM Column Flotation Technology and PTI's On-Line Quality Monitor Control System. The twelve-month project will involve installation of a 300 lb/hr. bench-scale testing circuit at PETC's Coal Preparation Process Research Facility (CPPRF) and testing of two bituminous coals (Upper Freeport and Pittsburgh No. 8 Seam Raw Coals). Figure 1 contains the pro… more
Date: January 22, 1992
Partner: UNT Libraries Government Documents Department
open access

Power to detect normal mixtures: Simulation results

Description: Twenty tests for normality were compared for the purpose of detecting mixtures of two normal components with unequal means but equal variance. The purpose of this study was to determine the power of tests specifically designed to detect mixtures, i.e., the likelihood ratio and Engelman-Hartigan tests, relative to other tests for normality. We considered the entire range of mixing proportions [pi], 0 < [pi] < 1. For mixtures that are nearly symmetric (0.35 < [pi] < 0.65) the Engelman-Hartigan te… more
Date: July 22, 1992
Creator: Thode, H.C. Jr.
Partner: UNT Libraries Government Documents Department
open access

Pulsed laser kinetic studies of liquids under high pressure

Description: A laser flash photolysis kinetic study of 2,2{prime}-bipyridine bidentate chelating ligands with one claw in the first coordination sphere of a molybdenum carbonyl complex has been completed at pressures up to 150 MPa. The reaction mechanism for thermal ring closure is found from activation volumes to change from associative interchange to dissociative interchange as substituents on the 2,2{prime}-bipyridine ligands become bulkier. In a similar study of more rigid, substituted phenanthroline bi… more
Date: September 22, 1992
Creator: Eyring, E.M.
Partner: UNT Libraries Government Documents Department
open access

A survey of problems in divertor and edge plasma theory

Description: Theoretical physics problems related to divertor design are presented, organized by the region in which they occur. Some of the open questions in edge physics are presented from a theoretician's point of view. After a cursory sketch of the fluid models of the edge plasma and their numerical realization, the following topics are taken up: time-dependent problems, non-axisymmetric effects, anomalous transport in the scrape-off layer, edge kinetic theory, sheath effects and boundary conditions in … more
Date: December 22, 1992
Creator: Boozer, A. (Coll. of William and Mary, Williamsburg, VA (United States)); Braams, B.; Weitzner, H. (New York Univ., NY (United States). Courant Inst. of Mathematical Sciences); Cohen, R. (Lawrence Livermore National Lab., CA (United States)); Hazeltine, R. (Texas Univ., Austin, TX (United States). Inst. for Fusion Studies); Hinton, F. (General Atomics, San Diego (United States)) et al.
Partner: UNT Libraries Government Documents Department
open access

Ruthenium volatility from the vitrification of melter feeds prepared using the Nitric Acid Flowsheet

Description: The present DWPF flowsheet calls for the chemical treatment of waste sludge with 90 wt% formic acid prior to the addition of the Precipitate Hydrolysis Aqueous (PHA) product. An alternative processing methodology, denoted the ``Nitric Acid Flowsheet``, has been proposed. In the application of this flowsheet, nitric acid would be used to neutralize sludge base components (hydroxides and carbonates) prior to the addition of late wash PHA. The late wash PHA will contain sufficient quantities of fo… more
Date: October 22, 1992
Creator: Hutson, N. D.
Partner: UNT Libraries Government Documents Department
open access

An evaluation of foaming potential in the IDMS melter

Description: The present DWPF flowsheet calls for the chemical treatment of waste sludge with 90 wt% formic acid prior to the addition of the Precipitate Hydrolysis Aqueous (PHA) product. An alternative processing methodology, denoted the ``Nitric Acid Flowsheet``, has been proposed. In the application of this flowsheet, nitric acid would be used to neutralize sludge base components (hydroxides and carbonates) prior to the addition of late wash PHA. The late wash PHA will contain sufficient quantities of fo… more
Date: October 22, 1992
Creator: Hutson, N. D.
Partner: UNT Libraries Government Documents Department
open access

Power to detect normal mixtures: Simulation results

Description: Twenty tests for normality were compared for the purpose of detecting mixtures of two normal components with unequal means but equal variance. The purpose of this study was to determine the power of tests specifically designed to detect mixtures, i.e., the likelihood ratio and Engelman-Hartigan tests, relative to other tests for normality. We considered the entire range of mixing proportions {pi}, 0 < {pi} < 1. For mixtures that are nearly symmetric (0.35 < {pi} < 0.65) the Engelman-Hartigan te… more
Date: July 22, 1992
Creator: Thode, H. C. Jr.
Partner: UNT Libraries Government Documents Department
open access

Fundamental studies of catalytic processing of synthetic liquids. Quarterly progress report, April 1, 1992--June 30, 1992

Description: This project revolves around understanding the fundamental processes involved in the catalytic removal of harmful oxygenated organics present in coal liquids. We are modelling the complex type of sulfided Mo catalyst proposed for these reactions with simple single crystal surfaces. These display a controlled range and number of reaction sites and can be extensively characterized by surface science techniques. We then investigate the reaction pathways for representative simple oxygenates upon th… more
Date: June 22, 1992
Creator: Watson, P. R.
Partner: UNT Libraries Government Documents Department
open access

A survey of problems in divertor and edge plasma theory

Description: Theoretical physics problems related to divertor design are presented, organized by the region in which they occur. Some of the open questions in edge physics are presented from a theoretician`s point of view. After a cursory sketch of the fluid models of the edge plasma and their numerical realization, the following topics are taken up: time-dependent problems, non-axisymmetric effects, anomalous transport in the scrape-off layer, edge kinetic theory, sheath effects and boundary conditions in … more
Date: December 22, 1992
Creator: Boozer, A.; Braams, B.; Weitzner, H.; Cohen, R.; Hazeltine, R.; Hinton, F. et al.
Partner: UNT Libraries Government Documents Department
open access

Limits for the new DWPF melter off-gas jumper I.D.

Description: In order to minimize solids deposition in the off-gas line between the primary film cooler and the quencher, Savannah River Laboratory (SRL) recommended earlier that a new DWPF melter off-gas jumper be built which would increase the off-gas velocity from less than 40 ft/s under the original design to at least 55 ft/s, excluding the melter air inleakage. Two design changes proposed for the new jumper were: (1) relocation of the entry point for the melter pressure control air from the current pos… more
Date: January 22, 1992
Creator: Choi, A. S.
Partner: UNT Libraries Government Documents Department
open access

Fundamental studies of catalytic processing of synthetic liquids. Quarterly progress report, October 1, 1991--December 31, 1991

Description: This project revolves around understanding the fundamental processes involved in the catalytic removal of harmful oxygenated organics present in coal liquids. We are modelling the complex type of sulfided Mo catalyst proposed for these reactions with simple single crystal surfaces. These display a controlled range and number of reaction sites and can be extensively characterized by surface science techniques. We then investigate the reaction pathways for representative simple oxygenates upon th… more
Date: January 22, 1992
Creator: Watson, P. R.
Partner: UNT Libraries Government Documents Department
open access

Air toxics from heavy oil production and consumption

Description: This report assesses the potential impact of recent Federal and state regulations for airborne toxic substances on the production and consumption of heavy fuel oils. Emissions of nickel from heavy oil production in California are considered in some detail, in conjunction with California state regulations for toxic emissions. Although the use of thermal energy from heavy crude oils could in theory be impacted by toxic air pollution regulations, recent trends towards the use of natural gas for th… more
Date: December 22, 1992
Creator: Lipfert, F. W.; DePhillips, M. P. & Moskowitz, P. D.
Partner: UNT Libraries Government Documents Department
open access

High temperature stability, interface bonding, and mechanical behavior in {beta}-NiAl and Ni{sub 3}Al matrix composites with reinforcements modified by ion beam enhanced deposition. Progress report, June 1, 1991--May 31, 1992

Description: In preparation for experiments with surface modified Al{sub 2}O{sub 3} reinforcements in {beta}NiAl, diffusion bonding experiments were conducted. FP alumina fibers were prepared with ion sputtered surface films (Al{sub 2}O{sub 3}, Al, Ni) and then composited with {beta}NiAl slabs and hot pressed. After 70 thermal cycles, interfacial shear strength was measured. A roughness mechanism is proposed for the observed increased strength of the coated fibers. Creep in Ni{sub 3}Al was studied. 3 figs, … more
Date: January 22, 1992
Creator: Grummon, D. S.
Partner: UNT Libraries Government Documents Department
open access

[Direct coal liquefaction baseline design and system analysis]. Quarterly status report, [December 23, 1991--March 15, 1992]

Description: The primary objective of the study is to develop a computer model for a base line direct coal liquefaction design based on two stage direct coupled catalytic reactors. This primary objective is to be accomplished by completing the following: a base line design based on previous DOE/PETC results from Wilsonville pilot plant and other engineering evaluations; a cost estimate and economic analysis; a computer model incorporating the above two steps over a wide range of capacities and selected proc… more
Date: June 22, 1992
Partner: UNT Libraries Government Documents Department
open access

Testbed model and data assimilation for ARM. Progress report No. 2, 1 March 1991--31 August 1992 (revised)

Description: The objectives of this contract are to further develop and test the ALFA (AER Local Forecast and Assimilation) model originally designed at AER for local weather prediction and apply it to three distinct but related purposes in connection with the Atmospheric Radiation Measurement (ARM) program: (a) to provide a testbed that simulates a global climate model in order to facilitate the development and testing of new cloud parametrizations and radiation models; (b) to assimilate the ARM data conti… more
Date: September 22, 1992
Creator: Louis, J. F.
Partner: UNT Libraries Government Documents Department
open access

Pulsed laser kinetic studies of liquids under high pressure. Progress report, November 25, 1991--September 18, 1992

Description: A laser flash photolysis kinetic study of 2,2{prime}-bipyridine bidentate chelating ligands with one claw in the first coordination sphere of a molybdenum carbonyl complex has been completed at pressures up to 150 MPa. The reaction mechanism for thermal ring closure is found from activation volumes to change from associative interchange to dissociative interchange as substituents on the 2,2{prime}-bipyridine ligands become bulkier. In a similar study of more rigid, substituted phenanthroline bi… more
Date: September 22, 1992
Creator: Eyring, E. M.
Partner: UNT Libraries Government Documents Department
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