[Oxygenated octane enhancers: Syngas to isobutylene]. Technical progress report No. 8, January 1, 1993--March 31, 1993 (open access)

[Oxygenated octane enhancers: Syngas to isobutylene]. Technical progress report No. 8, January 1, 1993--March 31, 1993

The goal of this program is to develop a catalyst and a process for the conversion of syngas to isobutylene. However, due to the low conversion and selectivity generally experienced by the industry in direct conversion of syngas to isobutylene, indirect conversion via branched C{sub 4} alcohol intermediates is being explored. The objectives of the current program are to develop a catalyst and process for the conversion of syngas to isobutanol and to evaluate the commercial potential of the new process. The research program underway at UOP will identify and optimize key catalyst and process characteristics. This report covers the modification and shake-down of a fixed-bed pilot plant (No. 700) for the testing of catalysts and catalyst combinations. A separate syngas feed system has been added to an existing fixed bed Fischer-Tropsch pilot plant and new reactors are constructed to avoid catalyst cross contamination. Shake-down testing with a commercial Cu/Zn/Al oxide catalyst alone and in combination with a basic Mg/Al MOSS (Metal Oxide Solid Solution) catalyst have demonstrated good CO and H{sub 2} conversion. However, contamination of the product by residual Fischer-Tropsch product in the exit lines and the liquid gas chromatograph (GC) has prevented accurate product analyses. A separate …
Date: October 25, 1993
Creator: Barger, P. T.
Object Type: Report
System: The UNT Digital Library
Cobalt Source Calibration (open access)

Cobalt Source Calibration

The data obtained from these tests determine the dose rate of the two cobalt sources in SRTC. This testing used chemical dosimetry to measure the dose rate of a radioactive source.
Date: October 25, 1999
Creator: Barnes, M.
Object Type: Report
System: The UNT Digital Library
Disaster Mitigation Bills in the 106th Congress: H.R. 707, S. 1691 Compared (open access)

Disaster Mitigation Bills in the 106th Congress: H.R. 707, S. 1691 Compared

The Robert T. Stafford Disaster Relief and Emergency Assistance Act authorizes the President to declare that an emergency or major disaster exists that overwhelms state and local resources. Legislation before the 106th Congress (H.R. 707 and S. 1691) would, among other matters, amend the Act to: (1) fund hazard mitigation projects designed to reduce future disaster losses; (2) add conditions to assistance; and (3) consolidate provisions governing the distribution of aid to disaster victims. This report compares provisions of the two bills, and will be updated as legislative action occurs.
Date: October 25, 1999
Creator: Bea, Keith
Object Type: Report
System: The UNT Digital Library
Thermal Decomposition Characteristics of Orthorhombic Ammonium Perchlorate (o-AP) and an 0-AP/HTPB-Based Propellant (open access)

Thermal Decomposition Characteristics of Orthorhombic Ammonium Perchlorate (o-AP) and an 0-AP/HTPB-Based Propellant

A study to characterize the low-temperature reactive processes for o-AP and an AP/HTPB-based propellant (class 1.3) is being conducted in the laboratory using the techniques of simultaneous thermogravimetric modulated beam mass spectrometry (STMBMS) and scanning electron microscopy (SEM). The results presented in this paper are a follow up of the previous work that showed the overall decomposition to be complex and controlled by both physical and chemical processes. The decomposition is characterized by the occurrence of one major event that consumes up to {approx}35% of the AP, depending upon particle size, and leaves behind a porous agglomerate of AP. The major gaseous products released during this event include H{sub 2}O, O{sub 2}, Cl{sub 2}, N{sub 2}O and HCl. The recent efforts provide further insight into the decomposition processes for o-AP. The temporal behaviors of the gas formation rates (GFRs) for the products indicate that the major decomposition event consists of three chemical channels. The first and third channels are affected by the pressure in the reaction cell and occur at the surface or in the gas phase above the surface of the AP particles. The second channel is not affected by pressure and accounts for the solid-phase reactions characteristic of …
Date: October 25, 1999
Creator: Behrens, Richard, Jr. & Minier, Leanna M. G.
Object Type: Article
System: The UNT Digital Library
System design description, PFP low level waste treatment facility (open access)

System design description, PFP low level waste treatment facility

None
Date: October 25, 1994
Creator: Bershaw, D. M.
Object Type: Report
System: The UNT Digital Library
(Working Team meeting of IEA-CADDET) (open access)

(Working Team meeting of IEA-CADDET)

The traveler serving as Delegate from the United States, Center for the Analysis and Dissemination of Demonstrated Energy, (CADDET) National Team, participated in the activities of the annual International Energy Agency, CADDET Working Team meeting. Highlights of this meeting included progress/status presentations by 12 to 13 CADDET National Teams, development of future CADDET work plans including a prioritization of activities, and discussions of long range expectations for CADDET. Follow-up discussions were held with CADDET staff members which focused on US CADDET National Team contributions to the CADDET newsletter, brochures and register of demonstrated energy technologies.
Date: October 25, 1990
Creator: Broders, M. A.
Object Type: Report
System: The UNT Digital Library
Iraq-Kuwait: United Nations Security Council Resolutions Test and Votes -- 1991 (open access)

Iraq-Kuwait: United Nations Security Council Resolutions Test and Votes -- 1991

This report lists the 12 adopted United Nations Security Council resolutions relating to the Iraq-Kuwait situation through October 1991. The texts of these resolutions, along with the votes by members of the Council, are included in this report.
Date: October 25, 1991
Creator: Browne, Marjorie Ann
Object Type: Report
System: The UNT Digital Library
Fate of SO{sub 2} During Plasma Treatment of Diesel Engine Exhaust (open access)

Fate of SO{sub 2} During Plasma Treatment of Diesel Engine Exhaust

Several catalytic aftertreatment technologies rely on the conversion of NO to NO{sub 2} to achieve efficient reduction of NO{sub x} and particulates in diesel engine exhaust. These technologies require low sulfur fuel because the catalyst component that is active in converting NO to NO{sub 2} is also active in converting SO{sub 2} to SO{sub 3}. A non-thermal plasma can be used for the selective partial oxidation of NO to NO{sub 2} in the gas-phase under diesel engine exhaust conditions. This paper discusses how a non-thermal plasma can efficiently oxidize NO to NO{sub 2} without oxidizing SO{sub 2} to SO{sub 3}. It is shown that the presence of hydrocarbons in the plasma is essential for enhancing the selective partial oxidation of NO and suppressing the oxidation of SO{sub 2}.
Date: October 25, 1999
Creator: Brusasco, R.M.; Merritt, B.T. & Vogtlin, G.E.
Object Type: Article
System: The UNT Digital Library
Acceptance Test Report for the high pressure water jet system canister cleaning fixture (open access)

Acceptance Test Report for the high pressure water jet system canister cleaning fixture

This Acceptance Test confirmed the test results and recommendations, documented in WHC-SD-SNF-DTR-001, Rev. 0 Development Test Report for the High Pressure Water Jet System Nozzles, for decontaminating empty fuel canisters in KE-Basin. Optimum water pressure, water flow rate, nozzle size and overall configuration were tested
Date: October 25, 1995
Creator: Burdin, J.R.
Object Type: Report
System: The UNT Digital Library
Kinetic models of hydrocarbon generation (open access)

Kinetic models of hydrocarbon generation

We are carrying out an integrated program of laboratory experiments, kinetics modeling, and basin thermal history modeling in order to better understand the natural breakdown of organic matter into oil and gas. Our kinetic models of organic maturation are being used to better understand the coupling of generation, cracking, expulsion, and overpressuring in both the laboratory and geologic setting. Currently we are carrying out chemical experiments and developing more efficient chemical kinetic modeling schemes to obtain a better understanding of expulsion and cracking from lean source rocks and from hydrogen-poor (terrestrial) organic source material. We verify the chemical kinetic models by integrating them with thermal history models of hydrocarbon-producing sediments and comparing predicted and observed characteristics of the hydrocarbon occurrence in a variety of settings. We intend to apply this approach to evaluate the potential for deep gas resources in the Pacific Northwest and in the Louisiana Gulf Coast. 11 refs., 4 figs.
Date: October 25, 1990
Creator: Burnham, A. K. & Sweeney, J. J.
Object Type: Article
System: The UNT Digital Library
Project Management Plan to Maintain Safe and Compliant Conditions at the Plutonium Finishing Plant (PFP) (open access)

Project Management Plan to Maintain Safe and Compliant Conditions at the Plutonium Finishing Plant (PFP)

This Project Management Plan presents the overall plan, description, mission, and workscope for the Plutonium Finishing Plant (PFP) maintain safe and compliant conditions project at PFP.
Date: October 25, 1999
Creator: COX, G.J.
Object Type: Report
System: The UNT Digital Library
High Voltage GaN Schottky Rectifiers (open access)

High Voltage GaN Schottky Rectifiers

Mesa and planar GaN Schottky diode rectifiers with reverse breakdown voltages (V{sub RB}) up to 550V and >2000V, respectively, have been fabricated. The on-state resistance, R{sub ON}, was 6m{Omega}{center_dot} cm{sup 2} and 0.8{Omega}cm{sup 2}, respectively, producing figure-of-merit values for (V{sub RB}){sup 2}/R{sub ON} in the range 5-48 MW{center_dot}cm{sup -2}. At low biases the reverse leakage current was proportional to the size of the rectifying contact perimeter, while at high biases the current was proportional to the area of this contact. These results suggest that at low reverse biases, the leakage is dominated by the surface component, while at higher biases the bulk component dominates. On-state voltages were 3.5V for the 550V diodes and {ge}15 for the 2kV diodes. Reverse recovery times were <0.2{micro}sec for devices switched from a forward current density of {approx}500A{center_dot}cm{sup -2} to a reverse bias of 100V.
Date: October 25, 1999
Creator: Cao, X. A.; Cho, H.; Chu, S. N. G.; Chuo, C. C.; Chyi, J. I.; Dang, G. T. et al.
Object Type: Article
System: The UNT Digital Library
New W mass results from CDF and D0 (open access)

New W mass results from CDF and D0

This article describes recent measurements of the W mass by the CDF and D0 Collabo-rations. CDF obtains a preliminary result of 80.473 ± 0.113 GeV for the W mass in the electron channel and D0 reports a preliminary result of 80.766 ± 0.234 GeV for electrons in the more forward (Endcap) rapidities. When combined with all previous measurements, the current average for the W mass measured at the Tevatron is 80.450 ± 0.063 GeV.
Date: October 25, 1999
Creator: Carithers, B.
Object Type: Article
System: The UNT Digital Library
Radiological impact of Par Pond drawdown from liquid effluent pathways (open access)

Radiological impact of Par Pond drawdown from liquid effluent pathways

The water level of Par Pond has been lowered over the past several months to reduce the effects in the event of catastrophic dam failure while assessing the condition of the dam and determining if repairs are necessary. In lowering the level of Par Pond, 60 billion liters of water containing low levels of tritium and cesium-137 were discharged to several onsite streams. SRS surface streams flow to the Savannah River. An assessment made to determine the total amount of tritium and Cs-137 discharged and to estimate the consequences to downstream Savannah River users. It is estimated that a total of 160 curies of tritium were displaced from Par Pond to the Savannah River between June 28, 1991 and September 19, 1991. This release could hypothetically result in a maximum individual dose of 3. 2{times}10{sup {minus}4} mrem and a total (80-km and drinking water populations) population dose of 1.4{times}10{sup {minus}2} person-rem. Likewise, a maximum individual dose of 5.0{times}10{sup {minus}2} mrem and a total population dose of 1.7{times}10{sup {minus}1} person- rem are predicted as a result of an estimated 0.21 curies of Cs-137 being discharged from Par Pond to the Savannah River.
Date: October 25, 1991
Creator: Carlton, W. H. & Hamby, D. M.
Object Type: Report
System: The UNT Digital Library
Radiological impact of Par Pond drawdown from liquid effluent pathways (open access)

Radiological impact of Par Pond drawdown from liquid effluent pathways

The water level of Par Pond has been lowered over the past several months to reduce the effects in the event of catastrophic dam failure while assessing the condition of the dam and determining if repairs are necessary. In lowering the level of Par Pond, 60 billion liters of water containing low levels of tritium and cesium-137 were discharged to several onsite streams. SRS surface streams flow to the Savannah River. An assessment made to determine the total amount of tritium and Cs-137 discharged and to estimate the consequences to downstream Savannah River users. It is estimated that a total of 160 curies of tritium were displaced from Par Pond to the Savannah River between June 28, 1991 and September 19, 1991. This release could hypothetically result in a maximum individual dose of 3. 2{times}10{sup {minus}4} mrem and a total (80-km and drinking water populations) population dose of 1.4{times}10{sup {minus}2} person-rem. Likewise, a maximum individual dose of 5.0{times}10{sup {minus}2} mrem and a total population dose of 1.7{times}10{sup {minus}1} person- rem are predicted as a result of an estimated 0.21 curies of Cs-137 being discharged from Par Pond to the Savannah River.
Date: October 25, 1991
Creator: Carlton, W. H. & Hamby, D. M.
Object Type: Report
System: The UNT Digital Library
Beam dynamics studies in a high-brightness photo-injector (open access)

Beam dynamics studies in a high-brightness photo-injector

A high-brightness photo-injector has been developed at Fermilab in collaboration with the TTF project at DESY. Two systems have been commissioned, one at DESY and one at Fermilab. The injector [1] consists of a 1.625-cell cavity RF gun, a superconducting niobium cavity (both 1.3 GHz), and a magnetic chicane. The gun is designed for an electric field of up to 50 MV/m on the cathode. Emittance compensation solenoids surround the gun to correct the linear space charge emittance growth. A high quantum efficiency Cs{sub 2}Te photocathode located in the first half-cell produces electrons when illuminated by 263 nm wavelength light (fourth harmonic of the Nd:YLF laser). The laser [2] was designed to produce a train of up to 800 equal amplitude, 10 {micro}J UV pulses spaced by 1 {micro}s at 1 Hz repetition rate. The laser pulse length is adjustable between 1 and 20 ps FWHM. The superconducting cavity is a 9-cell Nb structure fabricated by industry for TTF. It was tested with RF at DESY before being sent to Fermilab. At present, the cavity is operated at {approx}11 MeV/m. Beam measurements with the injector at Fermilab are in progress. Preliminary results for emittance and bunch length will be discussed …
Date: October 25, 1999
Creator: Carneiro, Jean-Paul
Object Type: Article
System: The UNT Digital Library
First results of the Fermilab high-brightness RF photoinjector (open access)

First results of the Fermilab high-brightness RF photoinjector

A collaboration has been formed between FNAL, UCLA, INFN Milano, the University of Rochester, and DESY to develop the technology of an RF photoinjector, followed by a superconducting cavity, to produce high bunch charge (8 nC) with low normalized emittance (< 20 mm {center_dot} mrad) in trains of 800 bunches separated by 1{micro}s. The activities of the collaboration fall into two categories: (1) the development of Injector II for the TeSLA/TTF accelerator [1]. This photoinjector (TTF RF Gun)was tested at Fermilab in September and October 1998 and installed at DESY in November 1998; (2) the installation at the A0 Hall of Fermilab of a modified version of the TTF photoinjector, for photoinjector R&D and to study novel applications of high-brightness, pulsed electrons beams. This photoinjector (A0 RF Gun) produced its first beam in March 1999. This paper presents a summary of the tests done at Fermilab on the TTF Injector II and the first results obtained on the new Fermilab photoinjector.
Date: October 25, 1999
Creator: Carneiro, Jean-Paul
Object Type: Article
System: The UNT Digital Library
Hadron blind detector. Final report, FY1994 and 1995 (open access)

Hadron blind detector. Final report, FY1994 and 1995

The authors have been developing a novel threshold Cherenkov detector, consisting of a gas radiator followed by a UV photosensitive wire chamber using CsI photocathodes. The photo-detector lies directly in the particle path and is thus required to have single photo-electron sensitivity and yet to be insensitive to the passage of a charged particle. In addition, the detector should be made of low mass material to minimize the effect of multiple scatterings. The proposed threshold Cherenkov counters are called Hadron Blind Detectors (HBDs) because they are blind to low energy hadrons which have lower speed {beta} for given momentum p than that of electrons. HBDs can be used in colliders, especially heavy ion hadron colliders (RHIC, LHC), which have huge {number_sign} of hadrons produced per event, to select electrons by being blind to low-momentum hadrons. The authors have studied two different methods to build HBDs described as follows: (1) windowless configuration; (2) thin window configuration. The authors describe herewith their recent experimental results on HBD research obtained with CsI photo-cathodes and HBD prototype beam testing in 1995.
Date: October 25, 1997
Creator: Chen, M.
Object Type: Report
System: The UNT Digital Library
Proton driver study at Fermilab (open access)

Proton driver study at Fermilab

Fermilab has started the design work of a high intensity proton source called the proton driver. It would provide a 4 MW proton beam to the target for muon production. This paper discusses the basic features of this machine and the associated accelerator physics and design issues.
Date: October 25, 1999
Creator: Chou, Weiren
Object Type: Article
System: The UNT Digital Library
Awards of Attorney's Fees to Small Businesses and Labor Organizations that Prevail Against the NLRB or OSHA: H.R. 1987, 106th Congress (open access)

Awards of Attorney's Fees to Small Businesses and Labor Organizations that Prevail Against the NLRB or OSHA: H.R. 1987, 106th Congress

H.R. 1987, 106th Congress, the Fair Access to Indemnity and Reimbursement (FAIR) Act, which was reported by the Committee on Education and the Workforce on October 14, 1999, would make it easier for small businesses and labor organizations that prevail against the NLRB or OSHA, in administrative or court proceedings, to recover their attorneys' fees from the government. It would do so by requiring fees to be awarded automatically in cases to which it applied, instead of only when the government's position was not substantially justified.
Date: October 25, 1999
Creator: Cohen, Henry
Object Type: Report
System: The UNT Digital Library
Temperature Control Feedback Loops for the Linac Upgrade Side Coupled Cavities at Fermilab (open access)

Temperature Control Feedback Loops for the Linac Upgrade Side Coupled Cavities at Fermilab

The linac upgrade project at Fermilab will replace the last 4 drift-tube linac tanks with seven side coupled cavity strings. This will increase the beam energy from 200 to 400 MeV at injection into the Booster accelerator. The main objective of the temperature loop is to control the resonant frequency of the cavity strings. A cavity string will constant of 4 sections connected with bridge couplers driven with a 12 MW klystron at 805 MHz. Each section is a side coupled cavity chain consisting of 16 accelerating cells and 15 side coupling cells. For the linac upgrade, 7 full cavity strings will be used. A separate temperature control system is planned for each of the 28 accelerating sections, the two transition sections, and the debuncher section. The cavity strings will be tuned to resonance for full power beam loaded conditions. A separate frequency loop is planned that will sample the phase difference between a monitor placed in the end cell of each section and the rf drive. The frequency loop will control the set point for the temperature loop which will be able to maintain the resonant frequency through periods within beam or rf power. The frequency loop will need …
Date: October 25, 1990
Creator: Crisp, Jim
Object Type: Report
System: The UNT Digital Library
Saltwell pumping systems R.A.M. analysis (open access)

Saltwell pumping systems R.A.M. analysis

This study characterizes the reliability, availability, and maintainability of saltwell pumping systems based on historical data, and identifies recommendations to improve operating efficiency. The report was initially issued as a letter report on September 9, 1999, reference no. NHC-9956343. The text is reproduced here with minor edits and without the appendices.
Date: October 25, 1999
Creator: DEFORD, D.K.
Object Type: Report
System: The UNT Digital Library
Deformation behavior in reactor pressure vessel steels as a clue to understanding irradiation hardening. (open access)

Deformation behavior in reactor pressure vessel steels as a clue to understanding irradiation hardening.

In this paper, we examine the post-yield true stress vs true strain behavior of irradiated pressure vessel steels and iron-based alloys to reveal differences in strain-hardening behavior associated with different irradiating particles (neutrons and electrons) and different alloy chernky. It is important to understand the effects on mechanical properties caused by displacement producing radiation of nuclear reactor pressure steels. Critical embrittling effects, e.g. increases in the ductile-to-brittle-transition-temperature, are associated with irradiation-induced increases in yield strength. In addition, fatigue-life and loading-rate effects on fracture can be related to the post-irradiation strain-hardening behavior of the steels. All of these properties affect the expected service life of nuclear reactor pressure vessels. We address the characteristics of two general strengthening effects that we believe are relevant to the differing defect cluster characters produced by neutrons and electrons in four different alloys: two pressure vessel steels, A212B and A350, and two binary alloys, Fe-0.28 wt%Cu and Fe-0.74 wt%Ni. Our results show that there are differences in the post-irradiation mechanical behavior for the two kinds of irradiation and that the differences are related both to differences in damage produced and alloy chemistry. We find that while electron and neutron irradiations (at T {le} 60 C) of …
Date: October 25, 1999
Creator: DiMelfi, R. J.; Alexander, D. E. & Rehn, L. E.
Object Type: Article
System: The UNT Digital Library
Laboratory measurements of compressional and shear wave speeds through methane hydrate (open access)

Laboratory measurements of compressional and shear wave speeds through methane hydrate

Simultaneous measurements of compressional and shear wave speeds through polycrystalline methane hydrate have been made. Methane hydrate, grown directly in a wave speed measurement chamber, was uniaxially compacted to a final porosity below 2%. At 277 K, the compacted material's compressional wave speed was 3650 {+-} 50 m/s. The shear wave speed, measured simultaneously, was 1890 {+-} 30 m/s. From these wave speed measurements, we derive Vp/Vs, Poisson's Ratio, bulk, shear and Young's moduli.
Date: October 25, 1999
Creator: Durham, W B; Waite, WF; Pinkston, J C; Stern, L A; Kirby, S H; Helgerud, M B et al.
Object Type: Article
System: The UNT Digital Library