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Summary of Degas II performance at the US Strategic Petroleum Reserve Big Hill site.

Description: Crude oil stored at the US Strategic Petroleum Reserve (SPR) requires mitigation procedures to maintain oil vapor pressure within program delivery standards. Crude oil degasification is one effective method for lowering crude oil vapor pressure, and was implemented at the Big Hill SPR site from 2004-2006. Performance monitoring during and after degasification revealed a range of outcomes for caverns that had similar inventory and geometry. This report analyzed data from SPR degasification and d… more
Date: October 1, 2007
Creator: Rudeen, David K. (GRAM, Inc., Albuquerque, NM) & Lord, David L.
Partner: UNT Libraries Government Documents Department
open access

Impact of the Wall Conditioning Program on Plasma Performance in NSTX

Description: High performance operating regimes have been achieved on NSTX (National Spherical Torus Experiment) through impurity control and wall-conditioning techniques. These techniques include HeGDC-aided boronization using deuterated trimethylboron, inter-discharge HeGDC, 350 C PFC bake-out followed by D2 and HeGDC, and experiments to test fueling discharges with either a He-trimethylboron mixture or pure trimethylboron. The impact of this impurity and density control program on recent advances in NSTX… more
Date: July 12, 2002
Creator: Kuge, H. W.; Soukhanovskii, V.; Bell, M.; Blanchard, W.; Gates, D.; LeBlanc, B. et al.
Partner: UNT Libraries Government Documents Department
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Rapid thermal outgassing of component samples

Description: This paper/presentation describes the rapid thermal outgassing tests that were ran to provide an inventory of all gasses present in the weld channel during the weld. The component samples tested were of all materials that are exposed to the channel during the temperature excursion due to the welding operation. The temperature ramps were determined from previous weld tests. The test equipment, test procedures, and the data collection system is described. They present the data and their interpret… more
Date: March 26, 1999
Creator: Beat, T G & Moffitt, K
Partner: UNT Libraries Government Documents Department
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H2O Outgassing from Silicones

Description: In this fiscal year, we have tested the H{sub 2}O outgassing model for TR55 against independent core tests performed at different temperatures by our collaborators at Y12. At higher temperature ({approx} 71 C), the model properly predicts moisture outgassing from TR55 over the entire experiment. At lower temperature ({approx} 42.5 C), the model correctly predicts long-term moisture outgassing. However, in short-term limit, a better fit with core tests might be expected when the diffusion effect… more
Date: November 9, 2004
Creator: Dinh, L. N.; Maxwell, R. S.; Schildbach, M. A.; Balazs, B. & McLean, W., II
Partner: UNT Libraries Government Documents Department
open access

Desorption Kinetics of H2O from Cab-O-Sil-M-7D and Hi-Sil-233 Silica Particles

Description: Temperature programmed desorption (TPD) was performed at temperatures up to 850K on Cab-O-Sil-M-7D and Hi-Sil-233 silica particles. Physisorbed water molecules on both types of silica had activation energies in the range of 9-14.5 kcal/mol. However, the activation energies of desorption for chemisorbed water varied from {approx} 19 kcal/mol to > 59 kcal/mol for Cab-O-Sil-M-7D, and {approx} 23-37 kcal/mol for Hi-Sil-233. Our results suggest that physisorbed water can be effectively pumped awa… more
Date: January 26, 2000
Creator: Dinh, L.; Balooch, M. & LeMay, J.D.
Partner: UNT Libraries Government Documents Department
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Recent Applications of SPME in Directed Stockpile Work (FY04)

Description: Solid Phase Microextraction (SPME) has been used to sample nonnuclear materials for analysis by gas chromatography-mass spectrometry (GC/MS). This report summarizes progress in the areas of individual materials' outgassing signatures, microcompatibility tests and analysis of polar analytes.
Date: November 8, 2004
Creator: Alviso, C; Harvey, C & Vance, A
Partner: UNT Libraries Government Documents Department
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Recent Developments in Graphite

Description: Developments in the production of various graphite products and data on the properties, outgassing, and radiation resistance of various graphites are reviewed. (C.J.G.)
Date: July 17, 1959
Creator: Kosiba, W. L.
Partner: UNT Libraries Government Documents Department
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Measurement and Prediction of H2O Outgassing Kinetics from Silica-Filled Polydimethylsiloxane TR55 and S5370

Description: The isoconversional technique was employed for the measurement and prediction of H2O outgassing kinetics from silica-filled polydimethylsiloxane TR55 and S5370 in a vacuum or dry environment. Isoconversional analysis indicates that the energy barrier for H2O release from TR55 and S5370 is an increasing function of the fractional H2O release. This can be interpreted as the release of H2O from physisorbed water and then chemisorbed water with decreasing OH density from the surfaces of the embedde… more
Date: August 28, 2006
Creator: Dinh, L. N.; Burnham, A. K.; Schildbach, M. A.; Smith, R. A.; Maxwell, R. S.; Balazs, B. et al.
Partner: UNT Libraries Government Documents Department
open access

Measurement and Prediction of Water Outgassing from TR55 Silicone by the Isoconversional Technique

Description: The objectives of this report are to measure the H{sub 2}O outgassing kinetics of TR55 silicon after a few hours of vacuum pumping; and to make H{sub 2}O outgassing kinetic predictions for TR55 at low temperatures in a vacuum/dry environment.
Date: May 1, 2006
Creator: Dinh, L N; Schildbach, M A; Burnham, A K; Maxwell, R S & Balazs, B
Partner: UNT Libraries Government Documents Department
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Kinetic measurement and prediction of the hydrogen outgassing from the polycrystalline LiH/LiOH system

Description: In this report, we present the use of temperature programmed reaction/decomposition (TPR) in the isoconversion mode to measure outgassing kinetics and to make kinetic prediction concerning hydrogen release from the polycrystalline LiH/LiOH system in the absence of any external H{sub 2}O source.
Date: March 9, 2005
Creator: Dinh, L. N.; Grant, D. M.; Schildbach, M. A.; Smith, R. A.; Leckey, J. H.; Siekhaus, W. J. et al.
Partner: UNT Libraries Government Documents Department
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Degassing of Aluminum Alloys Using Ultrasonic Vibration

Description: The research was intended to lead to a better fundamental understanding of the effect of ultrasonic energy on the degassing of liquid metals and to develop practical approaches for the ultrasonic degassing of alloys. The goals of the project described here were to evaluate core principles, establish a quantitative basis for the ultrasonic degassing of aluminum alloy melts, and demonstrate the application of ultrsaonic processing during ingot casting and foundry shape casting.
Date: June 1, 2006
Creator: Meek, T. T.; Han, Q. & Xu, H.
Partner: UNT Libraries Government Documents Department
open access

AL-SX (H1616) Container Support: Out-gassing of Polyethylene and Polycarbonate Resins

Description: Out-gassing tests were carried out on samples of polyethylene and polycarbonate packaging components used within the AL-SX (H1616) shipping container and compared to known samples of high and low density polyethylene and polycarbonate. Polyethylene is used to fabricate the shipping container overpack for the MC3007A/MC4059 and 1X-Acorn; LEXAN{reg_sign} polycarbonate (General Electric) is used to fabricate the lid of the Protective Container utilized to package the MC4213/MC4240 and MC4524 for s… more
Date: April 1, 1999
Creator: Story, G.Cook & Domeier, Leon Seibel and Linda
Partner: UNT Libraries Government Documents Department
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STUDIES RELATING TO HYDROGEN IN DINGOT URANIUM

Description: The distribution of H/sub 2/ among feed materials and products in the thermite reaction producing dingot U was studied. The H/sub 2/ content of Mg, molten U, and molten and solid MgF/sub 2/ density oxide to 98 to 99% for the high specific surface, ow bulk density oxides. The observed values for properties of the U/sub 3/O/sub 8/ samples correlated better with conversion of U/ sub 3/O/sub to UF/sub 4/ than did the observed values for properties of the corresponding UO/sub 2/ intermediates. (auth) more
Date: September 20, 1957
Creator: Trzeciak, M.J. & Mallett, M.W.
Partner: UNT Libraries Government Documents Department
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Challenges in the Packaging of MEMS

Description: Microelectromechanical Systems (MEMS) packaging is much different from conventional integrated circuit (IC) packaging. Many MEMS devices must interface to the environment in order to perform their intended function, and the package must be able to facilitate access with the environment while protecting the device. The package must also not interfere with or impede the operation of the MEMS device. The die attachment material should be low stress, and low outgassing, while also minimizing stress… more
Date: September 24, 1999
Creator: BROWN, WILLIAM D.; EATON, WILLIAM P.; MALSHE, AJAY P.; MILLER, WILLIAM M.; O'NEAL, CHAD & SINGH, SUSHILA B.
Partner: UNT Libraries Government Documents Department
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A Radically New Method for Hydrogen Storage in Hollow Glass Microspheres

Description: The primary goal of this project is to demonstrate that hydrogen gas can be rapidly extracted from hollow glass microspheres (HGMS) using a photo-induced heating effect. The results of the project demonstrate that diffusion of hydrogen is readily induced by exposure to light from an IR lamp in transition metal-doped HGMS filled to as much as 5,000 psi with hydrogen gas, which contain approximately 2.2 wt% hydrogen. Doped HGMS in conjunction with optically induced outgassing provide a solution t… more
Date: July 13, 2009
Creator: Shelby, James E.; Hall, Matthew M.; Snyder, Michael J. & Wachtel, Peter B.
Partner: UNT Libraries Government Documents Department
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Reactive Multiphase Behavior of CO2 in Saline Aquifers Beneath the Colorado Plateau

Description: Soil CO{sub 2} flux surveys have been conducted over known CO{sub 2} reservoirs at Farnham Dome, Utah, Crystal Geyser-Ten Mile Graben in Utah and Springerville-St. Johns, Arizona. No anomalous CO{sub 2} flux was detected at the Farnham Dome and Springerville-St. Johns. At Crystal Geyser-Ten Mile Graben, localized areas of anomalously high CO{sub 2} flux ({approx}100 g m{sup -2} day{sup -1}) occur along a fault zone near visibly degassing features. Isotopic measurements on CO{sub 2} collected fr… more
Date: May 16, 2005
Creator: Allis, R. G.; Moore, J. & White, S.
Partner: UNT Libraries Government Documents Department
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Extensional wave attenuation and velocity in partially saturated sand in the sonic frequency range

Description: Extensional wave attenuation and velocity measurements on a high permeability Monterey sand were performed over a range of gas saturations for imbibition and degassing conditions. These measurements were conducted using extensional wave pulse propagation and resonance over a 1-9 kHz frequency range for a hydrostatic confining pressure of 8.3 MPa. Analysis of the extensional wave data and the corresponding X-ray CT images of the gas saturation show strong attenuation resulting from the presence … more
Date: August 10, 2001
Creator: Liu, Z.; Rector, J. W.; Nihei, K. T.; Tomutsa, L.; Myer, L. R. & Nakagawa, S.
Partner: UNT Libraries Government Documents Department
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Operational test report, 500 CFM portable exhauster

Description: A 500 cubic foot per minute (CFM) portable exhauster system was fabricated for use on 241-A-101 [a Hydrogen Watch List tank] during saltwell pumping activities. An operational test was performed on this unit during 9/20/96 through 1O/14/96 in the 241-A Tank Farm. This operational test was done in accordance with OTP-060-001 Rev 0 (See Appendix A of this report). The test was performed with exceptions.
Date: May 15, 1997
Creator: Nelson, O. D.
Partner: UNT Libraries Government Documents Department
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Interrupted pumpdown of a vacuum system

Description: The pressure rise due to a surface outgassing process following a real pump closure has been analyzed and found under a physically reasonable parameter selection to occur very quickly yet result in a very slight actual pressure change. Real leaks thus should be able to be able to be distinguished from surface outgassing processes by this technique.
Date: January 1, 1980
Creator: Edwards, D Jr
Partner: UNT Libraries Government Documents Department
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Vacuum system development status for the APS (Advanced Photon Source) storage ring

Description: The status of the design and fabrication of a prototype sector of the storage ring vacuum system for the Advanced Photon Source is described. The 26.5-m-long prototype sector will be assembled within a full-scale magnet and tunnel mockup to study interspacial component relationships for maintenance, as well as the vacuum system operational performance. Each completed vacuum section is mounted as an integral part of the modular structure that contains the magnets and magnet power supplies on a c… more
Date: January 1, 1989
Creator: Wherle, R.; Nielson, R. & Kim, S.
Partner: UNT Libraries Government Documents Department
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Gas evolution from coal in sealed glass ampoules

Description: Higher rank coals evolve methane, and lower rank coals evolve carbon dioxide with some evolution of both gases for the intermediate ranks. The evolution proceeds over time of years for pulverized coals in sealed ampoules. Gas concentrations are higher above {minus}20 mesh samples than above {minus}100 mesh material. Carbon monoxide is not evolved. The Wyodak sample evolves carbon dioxide approximately linearly with time. The gas evolution sample evolves carbon dioxide approximately linearly wit… more
Date: December 31, 1992
Creator: Vorres, K. S.
Partner: UNT Libraries Government Documents Department
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