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Comparison of methods for separating small quantities of hydrogen isotopes from an inert gas

Description: It is frequent within tritium processing systems that a small amount of hydrogen isotopes (Q{sub 2}) must be separated from an inert gas such as He, Ar and N{sub 2}. Thus, a study of presently available technologies for effecting such a separation was performed. A base case and seven technology alternatives were identified and a simple design of each was prepared. These technologies included oxidation-adsorption-metal bed reduction, oxidation-adsorption-palladium membrane reactor, cryogenic ads… more
Date: March 1, 1998
Creator: Willms, R.S.; Tuggle, D.; Birdsell, S.; Parkinson, J.; Price, B. & Lohmeir, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Advancing the technology base for high-temperature membranes

Description: This is the final report of a two-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). This project addresses the major issues confronting the implementation of high-temperature membranes for separations and catalysis. We are pursuing high-temperature membrane systems that can have a large impact for DOE and be industrially relevant. A major obstacle for increased use of membranes is that most applications require the membrane material … more
Date: October 1, 1997
Creator: Dye, R.C.; Birdsell, S.A. & Snow, R.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of inlet conditions on the performance of a palladium membrane reactor

Description: Palladium membrane reactors (PMR) will be used to remove tritium and other hydrogen isotopes from impurities, such as tritiated methane and tritiated water, in the exhaust of the International Thermonuclear Experimental Reactor. In addition to fusion-fuel processing, the PMR system can be used to recover tritium from tritiated waste water. This paper investigates the effect of inlet conditions on the performance of a PMR. A set of experiments were run to determine, independently, the effect of … more
Date: October 1, 1997
Creator: Birdsell, S.A.; Willms, R.S.; Arzu, P. & Costello, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Tritium recovery from tritiated water with a two-stage palladium membrane reactor

Description: A process to recover tritium from tritiated water has been successfully demonstrated at TSTA. The 2-stage palladium membrane reactor (PMR) is capable of recovering tritium from water without generating additional waste. This device can be used to recover tritium from the substantial amount of tritiated water that is expected to be generated in the International Thermonuclear Experimental Reactor both from torus exhaust and auxiliary operations. A large quantity of tritiated waste water exists w… more
Date: April 1, 1997
Creator: Birdsell, S.A. & Willms, R.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ultra-high tritium decontamination of simulated fusion fuel exhaust using a 2-stage palladium membrane reactor

Description: A 2-stage cold (non-tritium) PMR system was tested with the ITER mix in61 days of continuous operation. No decrease in performance was observed over the duration of the test. Decontamination factor (DF) was found to increase with decreasing inlet rate. Decontamination factors in excess of 1.4 {times} 10{sup 5} were obtained, but the exact value of the highest DF could not be determined because of analysis limitations. Results of the 61-day test were used to design a 2-stage PMR system for use i… more
Date: December 1996
Creator: Birdsell, S. A.; Willms, R. S. & Wilhelm, R. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Modeling and data analysis of a palladium membrane reactor for tritiated impurities cleanup

Description: A Palladium Membrane Reactor (PMR) is under consideration for the tritium plant for the International Thermonuclear Experimental Reactor (ITER). The ITER reactor exhaust will contain tritiated impurities such as water and methane. Tritium will need to be recovered from these impurities for environmental and economic reasons. For this purpose a promising device, PMR, has been proposed. The PMR is a combined permeator and catalytic reactor. Shift catalysts are used to foster reactions such as wat… more
Date: July 1, 1995
Creator: Birdsell, S.A. & Willms, R.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recent palladium membrane reactor development at the tritium systems test assembly

Description: The palladium membrane reactor (PMR) is proving to be a simple and effective means for recovering hydrogen isotopes from fusion fuel impurities such as methane and water. This device directly combines two techniques which have long been utilized for hydrogen processing, namely catalytic shift reactions and palladium/silver permeators. A proof-of-principle (PMR) has been constructed and tested at the Tritium Systems Test Assembly of Los Alamos National Laboratory. The first tests with this devic… more
Date: July 1, 1995
Creator: Willms, R.S.; Birdsell, S.A. & Wilhelm, R.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Preferential oxidation of methanol and carbon monoxide for gas cleanup during methanol fuel processing

Description: Methanol fuel processing generates hydrogen for low-temperature, PEM fuel cell systems now being considered for transportation and other applications. Although liquid methanol fuel is convenient for this application, existing fuel processing techniques generate contaminants that degrade fuel cell performance. Through mathematical models and laboratory experiments chemical processing is described that removes CO and other contaminants from the anode feed stream.
Date: July 1, 1993
Creator: Birdsell, S. A.; Vanderborgh, N. E. & Inbody, M. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Calculation of Savannah River K Reactor Mark-22 assembly LOCA/ECS power limits

Description: This paper summarizes the results of TRAC-PF1/MOD3 calculations of Mark-22 fuel assembly of loss-of-coolant accident/emergency cooling system (LOCA/ECS) power limits for the Savannah River Site (SRS) K Reactor. This effort was part of a larger effort undertaken by the Los Alamos National Laboratory for the US Department of Energy to perform confirmatory power limits calculations for the SRS K Reactor. A method using a detailed three-dimensional (3D) TRAC model of the Mark-22 fuel assembly was d… more
Date: February 1, 1992
Creator: Fischer, S. R.; Farman, R. F. & Birdsell, S. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Calculation of Savannah River K Reactor Mark-22 assembly LOCA/ECS power limits

Description: This paper summarizes the results of TRAC-PF1/MOD3 calculations of Mark-22 fuel assembly of loss-of-coolant accident/emergency cooling system (LOCA/ECS) power limits for the Savannah River Site (SRS) K Reactor. This effort was part of a larger effort undertaken by the Los Alamos National Laboratory for the US Department of Energy to perform confirmatory power limits calculations for the SRS K Reactor. A method using a detailed three-dimensional (3D) TRAC model of the Mark-22 fuel assembly was d… more
Date: January 1, 1992
Creator: Fischer, S. R.; Farman, R. F. & Birdsell, S. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hot Dry Rock Geothermal Reservoir Model Development at Los Alamos

Description: Discrete fracture and continuum models are being developed to simulate Hot Dry Rock (HDR) geothermal reservoirs. The discrete fracture model is a two-dimensional steady state simulator of fluid flow and tracer transport in a fracture network which is generated from assumed statistical properties of the fractures. The model's strength lies in its ability to compute the steady state pressure drop and tracer response in a realistic network of interconnected fractures. The continuum approach models… more
Date: January 1, 1989
Creator: Robinson, B. A. & Birdsell, S. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hot dry rock fracture propagation and reservoir characterization

Description: North America's largest hydraulic fracturing opeations have been conducted at Fenton hill, New mexico to creae hot dry rock geothermal reservoirs. Microearthquakes induced by these fracturing operations were measured with geophones. The large volume of rock over which the microearthquakes were distributed indicates a mechanism of hydraulic stimulation which is at odds with conventional fracturing theory, which predicts failure along a plane which is perpendicular to the least compressive earth … more
Date: January 1, 1988
Creator: Murphy, H.; Fehler, M.; Robinson, B.; Tester, J.; Potter, R. & Birdsell, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Geochemistry and Tracer Behavior During a Thirty Day Flow Test of the Fenton Hill Hdr (Hot Dry Rock) Reservoir

Description: During the most recent circulating flow test of the Fenton Hill Hot Dry Rock (HDR) geothermal reservoir, the geochemical behavior of the produced fluid was monitored continuously to determine the concentrations of dissolved anions and cations and dissolved gases. Chemistry results have aided in the development of reservoir models and in the determination of potential chemistry-related operation problems such as corrosion and gas handling in future energy extraction tests. Results of two radioac… more
Date: January 1, 1987
Creator: Robinson, B. A.; Aguilar, R. G.; Kanaori, Yuji; Trujillo, P. E., Jr.; Counce, D. A.; Birdsell, S. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Prediction of Thermal Front Breakthrough Due to Fluid Reinjection in Geothermal Reservoirs

Description: Chemically reactive tracers can be used to measure reservoir temperature distributions because of their extreme sensitivity to temperature. If a reactive tracer flows through a reservoir from an injection well to a production well, then early in the production history the tracer will contact mostly high temperatures and experience a high percentage of decomposition. As more energy is extracted from the reservoir, subsequent reactive tracer tests will show less decomposition. Tracers must be cho… more
Date: January 1, 1987
Creator: Birdsell, S. A. & Robinson, B. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tracking Thermal Fronts With Temperature-Sensitive, Chemically Reactive Tracers

Description: Los Alamos is developing tracer techniques using reactive chemicals to track thermal fronts in fractured geothermal reservoirs. If a nonadsorbing tracer flowing from the injection to production well chemically reacts, its reaction rate will be a strong function of temperature. Thus the extent of chemical reaction will be greatest early in the lifetime of the system, and less as the thermal front progresses from the injection to production well. Early laboratory experiments identified tracers wi… more
Date: January 1, 1987
Creator: Robinson, B. A. & Birdsell, S. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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