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in subjects: "Isotope Separation"  
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Gas chromatographic studies of the relative retention of the sulfur isotopes in carbonyl sulfide, carbon disulfide, and sulfur dioxide

Description: A precision gas chromatograph, coupled to a quadrupole mass spectrometer and an on-line computer, was used to study the fractionation on Porasil A of the /sup 32/S//sup 34/S isotopic pair in a variety of sulfur-containing molecules. Carbonyl sulfide (COS) yielded an average ..cap alpha.. value of 1.00074 +- 0.00017 (standard deviation) for the temperature range 25/sup 0/C to 75/sup 0/C. The carbon disulfide (CS/sub 2/) value was 1.00069 +- 0.00023 for the range 53/sup 0/C to 103/sup 0/C, and th… more
Date: January 18, 1980
Creator: Fetzer, J.C. & Rogers, L.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Helium-jet coupled mass separator: advances and directions. [UNISOR; for nuclei far from beta stability]

Description: Results from the RAMA-88 system at the Lawrence Berkeley Laboratory are being used to design a new helium-jet and ion source system for the UNISOR project. This system should complement the existing integrated target-ion source to extend UNISOR's capabilities to include a majority of the chemical elements. This fast transport helium-jet system should permit studies of nuclides with half-lives down to 50 ms.
Date: January 1, 1980
Creator: Moltz, D.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Basic studies of a gas-jet-coupled ion source for on-line isotope separation

Description: A hollow-cathode ion source was used in a gas-jet-coupled configuration to produce ion beams of fission products transported to it from a /sup 252/Cf fission source. Solid aerosols of NaCl and Ag were used effectively as activity carriers in the gas-jet system. Flat-plate skimmers provided an effective coupling of the ion source to the gas jet. Ge(Li) spectrometric measurements of the activity deposited on an ion-beam collector relative to that deposited on a pre-skimmer collector were used to … more
Date: January 1, 1980
Creator: Anderl, R. A.; Novick, V. J. & Greenwood, R. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Single column and two-column H-D-T distillation experiments at TSTA

Description: Cryogenic distillation experiments were peformed at TSTA with H-D-T system by using a single column and a two-column cascade. In the single column experiment, fundamental engineering data such as the liquid holdup and the HETP were measured under a variety of operational condtions. The liquid holdup in the packed section was about 10 )approximately) 15% of its superficial volume. The HETP values were from 4 to 6 cm, and increased slightly with the vapor velocity. The reflux ratio had no effect … more
Date: January 1, 1988
Creator: Yamanishi, T.; Yoshida, H.; Hirata, S.; Naito, T.; Naruse, Y.; Sherman, R.H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Future directions and emerging techniques for ISOL systems

Description: The current status and future promise of ISOL systems are discussed, with emphasis on newly conceived experimental capabilities and interests. In addition to studies of nuclear structure using traditional or new on-line approaches, such as on-line nuclear orientation, the possibilities for studies with accelerated radioactive beams that have direct application to basic problems in materials science and astrophysics as well as to nuclear theory are pointed out. 43 refs., 3 figs., 1 tab.
Date: January 1, 1986
Creator: Talbert Jr., W. L. & Bunker, M. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High-resolution spectroscopy using tunable diode lasers: techniques and applications

Description: Methods for generating tunable monochromatic infrared radiation are tabulated. Techniques used in tunable semiconductor diode laser spectroscopy are discussed. Spectra of SF/sub 6/ and OsO/sub 4/ are discussed, including references to photodissociation and laser isotope separation. 4 figures, 3 tables, 80 references. (DLC)
Date: January 1, 1977
Creator: McDowell, R.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cascades for hydrogen isotope separation using metal hydrides

Description: Designs are presented for continuous countercurrent hydrogen isotope separation cascades based on the use of metal hydrides. The cascades are made up of pressure swing adsorption (PSA) or temperature swing adsorption (TSA) stages. The designs were evolved from consideration of previously conducted studies of the separation performance of four types of PSA and TSA processes.
Date: January 1, 1982
Creator: Hill, F.B. & Grzetic, V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Sulfur-isotope separation by distillation

Description: Sulfur-isotope separation by low-temperature distillation of hydrogen sulfide was studied in an 8-m, 25-mm diameter distillation column. Column temperature was controlled by a propane-propylene heat pipe. Column packing HETP was measured using nitric oxide in the column. The column was operated at pressures from 45 to 125 kPa. The relative volatility of S-32 vs. S-34 varied from 1.0008 to 1.0014.
Date: January 1, 1982
Creator: Mills, T.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Enhanced use of clips at the Los Alamos National Laboratory

Description: Early efforts in producing Expert Systems for engineering applications used a limited subset of CLIPS features. We discuss implementation details of previous Expert Systems and the current Expert System used for training operators in the control of the Isotope Separation System. 4 refs., 8 figs.
Date: January 1, 1991
Creator: Duerre, K. H.; Parkinson, W. J. & Osowski, J. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Capability of the electromagnetic isotope-enrichment facility at ORNL

Description: The isotope separation program at Oak Ridge National Laboratory (ORNL) prepares and distributes electromagnetically enriched stable isotopes to the worldwide scientific community. Among the topics discussed in the present paper are the methods of enriching isotopes, the limitations that apply to the quantity and final assay of the separation products, and a generalized production flowsheet indicating the capability of the facility. A brief description of each of the production steps, from the s… more
Date: January 1, 1982
Creator: Newman, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Practical enrichment technique for /sup 33/S (/sup 34/S)

Description: The successful preparation of a macroscopic sample of enriched /sup 33/S by laser-induced molecular dissociation is reported. Approach was to induce isotopically selective dissociation of SF/sub 6/ with CO/sub 2/-laser pulses and to separate the remaining SF/sup 6/ from the sulfur-containing reaction products by cryogenic distillation. A 200 Hz, 0.75 J/pulse laser was used for photolysis of low-pressure (less than 1 torr) gas mixtures. The mixture of SF/sub 6/ and scavenger recirculated continu… more
Date: January 1, 1982
Creator: McInteer, B.B.; Lyman, J.L.; Nilsson, A.C. & Quigley, G.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fusion tritium program in the United States

Description: The fusion technology development program for tritium in the US is centered around the Tritium Systems Test Assembly (TSTA) at Los Alamos National Labortory. Objectives of this project are to develop and demonstrate the fuel cycle for processing the reactor exhaust gas (unburned deuterium and tritium plus impurities), and the necessary personnel and environemntal protection systems for the next generation of fusion devices. The TSTA is a full-scale system for an INTOR/ITER sized machine. That i… more
Date: January 1, 1988
Creator: Anderson, J.L. & Bartlit, J.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement of uranium enrichment for gaseous uranium at low pressure

Description: X-ray fluoresence determines the amount of total uranium present in gaseous UF/sub 6/ inside cascade header pipes of a uranium centrifuge enrichment facility. A highly collimated source, highly collimated detector, and a very rigid, reproducible geometry are required. Two measurements of the 185.7-keV gamma ray from /sup 235/U using two collimators determine the amount of /sup 235/U present only in the gas phase. The ratio of the gas-only /sup 235/U signal to the total uranium gas-only signal i… more
Date: January 1, 1985
Creator: Close, D. A.; Pratt, J. C.; Atwater, H. F.; Malanify, J. J.; Nixon, K. V. & Speir, L. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Advanced Hydride Laboratory

Description: Metal hydrides have been used at the Savannah River Tritium Facilities since 1984. However, the most extensive application of metal hydride technology at the Savannah River Site is being planned for the Replacement Tritium Facility, a $140 million facility schedules for completion in 1990 and startup in 1991. In the new facility, metal hydride technology will be used to store, separate, isotopically purify, pump, and compress hydrogen isotopes. In support of the Replacement Tritium Facility, a … more
Date: January 1, 1989
Creator: Motyka, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Process: (international) safeguards interface at the Portsmouth GCEP from the safeguards technology developer's viewpoint

Description: The design of a major portion of a safeguards system for possible use by IAEA at the Portsmouth Gas Centrifuge Enrichment Plant is described from the viewpoint of the safeguards technology developer. The process-safeguards interface is reviewed, including safeguards, process, and operational constraints on the safeguards system. The conflicting requirements of the IAEA and the plant operator are minimized through the use of advanced technology that allows safeguards data to be acquired, analyze… more
Date: January 1, 1983
Creator: Tape, J. W.; Strittmatter, R. B. & Baker, A. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proposed separation of isomeric /sup 197m/Hg

Description: We explore the feasibility of separating 10/sup 14/-atom quantities of the nuclear isomer /sup 197m/Hg, using a three-step resonance ionization technique. It should be straightforward to achieve the separation in times of the order of 100 seconds, and there is a possibility of attaining separation times well under 1 second, as would be required for direct use in a gamma-ray laser.
Date: January 1, 1982
Creator: Dyer, P. & Baldwin, G.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Multi-user data acquisition environment

Description: The typical data acquisition environment involves data collection and monitoring by a single user. However, in order to support experiments on the Mars facility at Lawrence Livermore National Laboratory, we have had to create a multi-user data acquisition environment where any user can control the data acquisition and several users can monitor and analyze data being collected in real time. This paper describes how we accomplished this on an HP A600 computer. It focuses on the overall system des… more
Date: January 1, 1983
Creator: Storch, N.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A high intensity positron beam at the Brookhaven reactor

Description: We describe a high intensity, low energy positron beam utilizing high specific activity /sup 64/Cu sources (870 Ci/g) produced in a reactor with high thermal neutron flux. Fast-to-slow moderation can be performed in a self moderation mode or with a transmission moderator. Slow positron rates up to 1.6 x 10/sup 8/ e/sup +//s with a half life of 12.8 h are calculated. Up to 1.0 x 10/sup 8/ e/sup +//s have been observed. New developments including a Ne moderator and an on-line isotope separation p… more
Date: January 1, 1987
Creator: Weber, M.; Lynn, K. G.; Roellig, L. O.; Mills, A. P., Jr. & Moodenbaugh, A. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Stable-isotope-enrichment program at the Oak Ridge National Laboratory

Description: This paper has attempted to present a brief description of the production steps, from the selection and preparation of the initial feedstock to the recovery and distribution of the isotopically enriched materials. The facility suffers from the disadvantage of coping with utility and support systems that are rapidly becoming obsolescent and that the current operational level is insufficient to maintain sales inventory equilibrium. The electromagnetic isotope enrichment facility does, however, ha… more
Date: January 1, 1982
Creator: Newman, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of an enrichment monitor for the Portsmouth GCEP

Description: We have developed a gas-phase UF/sub 6/ enrichment monitor for use by the International Atomic Energy Agency at the Portsmouth Gas Centrifuge Enrichment Plant. The enrichment monitoring system provides a method for effective nuclear materials accountability verification while reducing the effort for both the facility operator and the inspector. The experience with an inplant prototype monitor, the facility and operational constraints, and the constraints related to international safeguards insp… more
Date: January 1, 1983
Creator: Strittmatter, R. B.; Stovall, L. A. & Sprinkle, J. K., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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UNISOR facility: recent developments and future directions

Description: The UNISOR isotope separator is described. This facility is presently on line to the Oak Ridge Isochronous Cyclotron, and will also be on line to a 25-MV folded tandem accelerator when the latter is completed. Intended primarily for the study of nuclei far from stability by means of radioactive-decay spectroscopy, the facility is designed and has been expanded to do multiple experiments simultaneously. This ability makes possible the completion of many studies that can expose the systematic beh… more
Date: January 1, 1979
Creator: Spejewski, E.H. & Mlekodaj, R.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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DEMONSTRATION OF THE NEXT-GENERATION TCAP HYDROGEN ISOTOPE SEPARATION PROCESS

Description: The first generation of TCAP hydrogen isotope separation process has been in service for tritium separation at the Savannah River Site since 1994. To prepare for replacement, a next-generation TCAP process has been developed. This new process simplifies the column design and reduces the equipment requirements of the thermal cycling system. An experimental twelve-meter column was fabricated and installed in the laboratory to demonstrate its performance. This new design and its initial test resul… more
Date: January 9, 2009
Creator: Heung, L; Henry Sessions, H; Steve Xiao, S & Heather Mentzer, H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fabrication of Separator Demonstration Facility process vessel

Description: The process vessel system is the central element in the Separator Development Facility (SDF). It houses the two major process components, i.e., the laser-beam folding optics and the separators pods. This major subsystem is the critical-path procurement for the SDF project. Details of the vaious parts of the process vessel are given.
Date: January 15, 1985
Creator: Oberst, E.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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