Sample records for gaseous par affinic

  1. Gaseous Hydrogen Delivery Breakout

    E-Print Network [OSTI]

    Gaseous Hydrogen Delivery Breakout Strategic Directions for Hydrogen Delivery Workshop May 7 detection Pipeline Safety: odorants, flame visibility Compression: cost, reliability #12;Breakout Session goal of a realistic, multi-energy distribution network model Pipeline Technology Improved field

  2. Gaseous Hydrogen Delivery Breakout - Strategic Directions for...

    Broader source: Energy.gov (indexed) [DOE]

    Gaseous Hydrogen Delivery Breakout - Strategic Directions for Hydrogen Delivery Workshop Gaseous Hydrogen Delivery Breakout - Strategic Directions for Hydrogen Delivery Workshop...

  3. Absorption du rayonnement 12 et 8 millimtres par les vapeurs de propane sous pression

    E-Print Network [OSTI]

    Boyer, Edmond

    Absorption du rayonnement 12 et 8 millimètres par les vapeurs de propane sous pression A. Battaglia des pertes diélectriques (03B5") présentées par le propane gazeux aux fréquences de 24 et 36 GHz, à la Birnbaum. Abstract. 2014 Experimental study of dielectric losses (03B5") presented by gaseous propane

  4. Affine and degenerate affine BMW algebras: Actions on tensor space

    E-Print Network [OSTI]

    Ram, Arun

    Affine and degenerate affine BMW algebras: Actions on tensor space Zajj Daugherty Department Actions of classical type tantalizers 8 2.1 The degenerate affine BMW algebra action . . . . . . . . . . . . . . . . . . . . . 13 2.2 The affine BMW algebra action . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3

  5. Solid and gaseous fuels

    SciTech Connect (OSTI)

    Schultz, H.; Wells, A.W.; Frommell, E.A.; Flenory, P.B.

    1987-06-15T23:59:59.000Z

    This review covers methods of sampling, analyzing, and testing coal, coke, and coal-derived solids covered during the period of October 1984 through Sept 30, 1986. Energy Research Abstracts and Chemical Abstracts were used as the reference sources. In most categories the volume of material available made it necessary to limit the number of publications in the review. This review also surveys publications concerned with methods for the chemical, physical, and instrumental analyses of gaseous fuels and related materials. Articles of significance appearing in foreign journals and the patent literature that were not available at the time of the last review are also included. Chemical Abstracts and Energy Research Abstracts were used extensively as reference sources. Some selectivity was necessary in order to include the most pertinent publications in preparing this review.

  6. Gaseous Flows in Galaxies

    E-Print Network [OSTI]

    F. Combes

    2007-09-02T23:59:59.000Z

    The gas component plays a major role in the dynamics of spiral galaxies, because of its dissipative character, and its ability to exchange angular momentum with stars in the disk. Due to its small velocity dispersion, it triggers gravitational instabilities, and the corresponding non-axisymmetric patterns produce gravity torques, which mediate these angular momentum exchanges. When a srong bar pattern develops with the same pattern speed all over the disk, only gas inside corotation can flow towards the center. But strong bars are not long lived in presence of gas, and multiple-speed spiral patterns can develop between bar phases, and help the galaxy to accrete external gas flowing from cosmic filaments. The gas is then intermittently driven to the galaxy center, to form nuclear starbursts and fuel an active nucleus. The various time-scales of these gaseous flows are described.

  7. Independent Oversight Review, Portsmouth Gaseous Diffusion Plant...

    Office of Environmental Management (EM)

    January 2013 Independent Oversight Review, Portsmouth Gaseous Diffusion Plant - January 2013 January 2013 Review of the Portsmouth Gaseous Diffusion Plant Work Planning and Control...

  8. Independent Activity Report, Portsmouth Gaseous Diffusion Plant...

    Office of Environmental Management (EM)

    Portsmouth Gaseous Diffusion Plant - August 2011 Independent Activity Report, Portsmouth Gaseous Diffusion Plant - August 2011 August 2011 Orientation Visit to the Portsmouth...

  9. Affine Defects and Gravitation

    E-Print Network [OSTI]

    R. J. Petti

    2014-12-12T23:59:59.000Z

    We argue that the structure general relativity (GR) as a theory of affine defects is deeper than the standard interpretation as a metric theory of gravitation. Einstein-Cartan theory (EC), with its inhomogenous affine symmetry, should be the standard-bearer for GR-like theories. A discrete affine interpretation of EC (and gauge theory) yields topological definitions of momentum and spin (and Yang Mills current), and their conservation laws become discrete topological identities. Considerations from quantum theory provide evidence that discrete affine defects are the physical foundation for gravitation.

  10. BERKELEY PAR LABBERKELEY PAR LAB Where we ended up

    E-Print Network [OSTI]

    California at Berkeley, University of

    , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 #12;BERKELEY PAR

  11. Affine and degenerate affine BMW algebras: Actions on tensor space

    E-Print Network [OSTI]

    Daugherty, Zajj; Virk, Rahbar

    2012-01-01T23:59:59.000Z

    The affine and degenerate affine Birman-Murakami-Wenzl (BMW) algebras arise naturally in the context of Schur-Weyl duality for orthogonal and symplectic quantum groups and Lie algebras, respectively. Cyclotomic BMW algebras, affine and cyclotomic Hecke algebras, and their degenerate versions are quotients. In this paper we explain how the affine and degenerate affine BMW algebras are tantalizers (tensor power centralizer algebras) by defining actions of the affine braid group and the degenerate affine braid algebra on tensor space and showing that, in important cases, these actions induce actions of the affine and degenerate affine BMW algebras. We then exploit the connection to quantum groups and Lie algebras to determine universal parameters for the affine and degenerate affine BMW algebras. Finally, we show that the universal parameters are central elements--the higher Casimir elements for orthogonal and symplectic enveloping algebras and quantum groups.

  12. Fuel Cells and Renewable Gaseous Fuels

    Broader source: Energy.gov [DOE]

    Breakout Session 3-C: Renewable Gaseous FuelsFuel Cells and Renewable Gaseous FuelsSarah Studer, ORISE Fellow—Fuel Cell Technologies Office, U.S. Department of Energy

  13. The Promise of Renewable Gaseous Fuels

    Broader source: Energy.gov [DOE]

    Breakout Session 3-C: Renewable Gaseous FuelsThe Promise of Renewable Gaseous FuelsJeffrey Reed, Director of Business Strategy and Development, Southern California Gas Company/San Diego Gas &...

  14. PARS II Training Workbook (Course 103) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    PARS II Training Workbook (Course 103) PARS II Training Workbook (Course 103) PARS II More Documents & Publications PARS II TRAINING PARS II TRAINING PARS II 104 Contractor Monthly...

  15. Affine and degenerate affine BMW algebras: The center

    E-Print Network [OSTI]

    Daugherty, Zajj; Virk, Rahbar

    2011-01-01T23:59:59.000Z

    The degenerate affine and affine BMW algebras arise naturally in the context of Schur-Weyl duality for orthogonal and symplectic Lie algebras and quantum groups, respectively. Cyclotomic BMW algebras, affine Hecke algebras, cyclotomic Hecke algebras, and their degenerate versions are quotients. In this paper the theory is unified by treating the orthogonal and symplectic cases simultaneously; we make an exact parallel between the degenerate affine and affine cases via a new algebra which takes the role of the affine braid group for the degenerate setting. A main result of this paper is an identification of the centers of the affine and degenerate affine BMW algebras in terms of rings of symmetric functions which satisfy a "cancellation property" or "wheel condition" (in the degenerate case, a reformulation of a result of Nazarov). Miraculously, these same rings also arise in Schubert calculus, as the cohomology and K-theory of isotropic Grassmanians and symplectic loop Grassmanians. We also establish new inte...

  16. MESURE DES INTENSITS PAR CEINTURE DE ROGOWSKI UTILISATION D'UNE SPIRE COMPENSATRICE

    E-Print Network [OSTI]

    Boyer, Edmond

    , specially in gaseous dis- charge, with « Rogowski belt » placed around conductor. The presence mesurer I (fig. 1). Le flux FIG. 1. de l'induction=Bo créé par ce courant, à travers les spires de l de la valeur de l'induction magnétique en tout point, le vecteur induction conservant toujours. une

  17. Affine maps of density matrices

    E-Print Network [OSTI]

    Thomas F. Jordan

    2004-11-21T23:59:59.000Z

    For quantum systems described by finite matrices, linear and affine maps of matrices are shown to provide equivalent descriptions of evolution of density matrices for a subsystem caused by unitary Hamiltonian evolution in a larger system; an affine map can be replaced by a linear map, and a linear map can be replaced by an affine map. There may be significant advantage in using an affine map. The linear map is generally not completely positive, but the linear part of an equivalent affine map can be chosen to be completely positive and related in the simplest possible way to the unitary Hamiltonian evolution in the larger system.

  18. presentee par SOPHIE ACHARD

    E-Print Network [OSTI]

    Boyer, Edmond

    THÈSE pr´esent´ee par SOPHIE ACHARD pour obtenir le titre de docteur de L'UNIVERSITÉ JOSEPH FOURIER'ils m'ont apport´ee. De longues et enthousiastes discussions avec Gersende Fort et Pierre Lafaye de

  19. Prsent par Laurence JOUNIAUX

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    .................................. 211 Caractérisation des milieux superficiels par des excitations provoquées : conversions sismo................................................................................................................................................ 307 C-1. PH�NOM�NES TRANSITOIRES SISMO-�LECTROMAGN�TIQUES............... 307 C-2. EFFET DE LA

  20. Automated Immobilized Metal Affinity Chromatography System for...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Immobilized Metal Affinity Chromatography System for Enrichment of Escherichia coli Phosphoproteome. Automated Immobilized Metal Affinity Chromatography System for Enrichment of...

  1. Hydrogen and Gaseous Fuel Safety and Toxicity

    SciTech Connect (OSTI)

    Lee C. Cadwallader; J. Sephen Herring

    2007-06-01T23:59:59.000Z

    Non-traditional motor fuels are receiving increased attention and use. This paper examines the safety of three alternative gaseous fuels plus gasoline and the advantages and disadvantages of each. The gaseous fuels are hydrogen, methane (natural gas), and propane. Qualitatively, the overall risks of the four fuels should be close. Gasoline is the most toxic. For small leaks, hydrogen has the highest ignition probability and the gaseous fuels have the highest risk of a burning jet or cloud.

  2. Independent Oversight Review, Portsmouth Gaseous Diffusion Plant...

    Office of Environmental Management (EM)

    Plant - November 2013 Independent Oversight Review, Portsmouth Gaseous Diffusion Plant - November 2013 November 5, 2013 Review of Preparedness for Severe Natural Phenomena Events...

  3. Independent Oversight Review, Portsmouth Gaseous Diffusion Plant...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    April 2013 Independent Oversight Review, Portsmouth Gaseous Diffusion Plant - April 2013 April 2013 Review of the Integrated Safety Management System Phase I Verification Review at...

  4. Process for exchanging hydrogen isotopes between gaseous hydrogen and water

    DOE Patents [OSTI]

    Hindin, Saul G. (Mendham, NJ); Roberts, George W. (Westfield, NJ)

    1980-08-12T23:59:59.000Z

    A process for exchanging isotopes of hydrogen, particularly tritium, between gaseous hydrogen and water is provided whereby gaseous hydrogen depeleted in tritium and liquid or gaseous water containing tritium are reacted in the presence of a metallic catalyst.

  5. Solid and gaseous fuels. [Review

    SciTech Connect (OSTI)

    Schultz, H.; Wells, A.W.; Mima, M.J.

    1985-04-01T23:59:59.000Z

    This review covers methods of sampling, analyzing, and testing coal, coke, and coal-derived solids. Energy Research Abstracts and Chemical Abstracts were used as reference sources. The volume of material available made it necessary to limit the number of publications in the review. This review also surveys publications concerned with methods for the chemical, physical, and instrumental analyses of gaseous fuels and related materials. Articles of significance appearing in foreign journals and the patent literature that were not available at the time of the last review are also included. Chemical Abstracts and Energy Research Abstracts were used extensively as reference sources. Some selectivity was necessary in order to include the most pertinent publications in preparing this review. 386 references.

  6. Portsmouth Gaseous Diffusion Plant - Quadrant I Groundwater Investigat...

    Office of Environmental Management (EM)

    Portsmouth Gaseous Diffusion Plant - Quadrant I Groundwater Investigative (5-Unit) Area Plume Portsmouth Gaseous Diffusion Plant - Quadrant I Groundwater Investigative (5-Unit)...

  7. Combination free electron and gaseous laser

    DOE Patents [OSTI]

    Brau, Charles A. (Los Alamos, NM); Rockwood, Stephen D. (Los Alamos, NM); Stein, William E. (Los Alamos, NM)

    1980-01-01T23:59:59.000Z

    A multiple laser having one or more gaseous laser stages and one or more free electron stages. Each of the free electron laser stages is sequentially pumped by a microwave linear accelerator. Subsequently, the electron beam is directed through a gaseous laser, in the preferred embodiment, and in an alternative embodiment, through a microwave accelerator to lower the energy level of the electron beam to pump one or more gaseous lasers. The combination laser provides high pulse repetition frequencies, on the order of 1 kHz or greater, high power capability, high efficiency, and tunability in the synchronous production of multiple beams of coherent optical radiation.

  8. LED PAR38 Lamps

    Broader source: Energy.gov [DOE]

    The following CALiPER reports provide detailed analysis of LED PAR38 lamp performance, covering basic performance characteristics as well as subjective evaluation of beam, shadow, and color quality. Pending reports will offer analysis on flicker, dimming and power quality characteristics; stress testing; and lumen and chromaticity maintenance. These reports are intended to educate the industry on market trends, potential issues, and important areas for improvement.

  9. Integrand and Performance Analysis with ParInt/ParVis

    E-Print Network [OSTI]

    de Doncker, Elise

    , USA E-mail: felise,rrzanny,kkaugars,lcucosg@cs.wmich.edu Abstract We present a survey of the contents://www.cs.wmich.edu/parint. This paper presents integrand analysis results obtained with ParInt1.1 and ParVis. It gives a survey ACR-0000442, EIA-0130857, ACI-0203776 Preprint submitted to Elsevier Science 11 October 2002 #12

  10. Gaseous insulators for high voltage electrical equipment

    DOE Patents [OSTI]

    Christophorou, Loucas G. (Oak Ridge, TN); James, David R. (Knoxville, TN); Pace, Marshall O. (Knoxville, TN); Pai, Robert Y. (Concord, TN)

    1981-01-01T23:59:59.000Z

    Gaseous insulators comprise compounds having high attachment cross sections for electrons having energies in the 0-1.3 electron volt range. Multi-component gaseous insulators comprise compounds and mixtures having overall high electron attachment cross sections in the 0-1.3 electron volt range and moderating gases having high cross sections for inelastic interactions with electrons of energies 1-4 electron volts. Suitable electron attachment components include hexafluorobutyne, perfluorobutene-2, perfluorocyclobutane, perfluorodimethylcyclobutane, perfluorocyclohexene, perfluoromethylcyclohexane, hexafluorobutadiene, perfluoroheptene-1 and hexafluoroazomethane. Suitable moderating gases include N.sub.2, CO, CO.sub.2 and H.sub.2. The gaseous insulating mixture can also contain SF.sub.6, perfluoropropane and perfluorobenzene.

  11. prsente par Jean-Christophe PASSELERGUE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Quadratique per unit - par unité Power System Stabilizer - Stabilisateur de puissance Réactance Commandée par Alternative Current Transmission System - Système de Transmission Flexible à Courant Alternatif High Voltage

  12. Methods and systems for deacidizing gaseous mixtures

    DOE Patents [OSTI]

    Hu, Liang

    2010-05-18T23:59:59.000Z

    An improved process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption is described. The process utilizes a multiphasic absorbent that absorbs an acid gas at increased rate and leads to reduced overall energy costs for the deacidizing operation.

  13. Gaseous Hydrogen Delivery Breakout- Strategic Directions for Hydrogen Delivery Workshop

    Broader source: Energy.gov [DOE]

    Targets, barriers and research and development priorities for gaseous delivery of hydrogen through hydrogen and natural gas pipelines.

  14. Gaseous modification of MCrAlY coatings

    DOE Patents [OSTI]

    Vance, Steven J. (Orlando, FL); Goedjen, John G. (Oviedo, FL); Sabol, Stephen M. (Orlando, FL); Sloan, Kelly M. (Longwood, FL)

    2000-01-01T23:59:59.000Z

    The present invention generally describes methods for modifying MCrAlY coatings by using gaseous carburization, gaseous nitriding or gaseous carbonitriding. The modified MCrAlY coatings are useful in thermal barrier coating systems, which may be used in gas turbine engines.

  15. Software digitizer for high granular gaseous detector

    E-Print Network [OSTI]

    Haddad, Y; Boudry, V

    2015-01-01T23:59:59.000Z

    A sampling calorimeter using gaseous sensor layers with digital readout [1] is near perfect for ``Particle Flow Algorithm'' [2,3] approach, since it is homogeneous over large surfaces, robust, cost efficient, easily segmentable to any readout pad dimension and size and almost insensitive to neutrons. Monte-Carlo (MC) programs such as GEANT4 [4] simulate with high precision the energy deposited by particles. The sensor and electronic response associated to a pad are calculated in a separate ``digitization'' process. We develop a general method for simulating the pad response using the spatial information from a simulation done at high granularity. The digitization method proposed here has been applied to gaseous detectors including Glass Resistive Plate Chambers (GRPC) and MicroMegas, and validated on test beam data. Experimental observable such as pad multiplicity and mean number of hits at different thresholds have been reproduced with high precision.

  16. Uranium enrichment export control guide: Gaseous diffusion

    SciTech Connect (OSTI)

    Not Available

    1989-09-01T23:59:59.000Z

    This document was prepared to serve as a guide for export control officials in their interpretation, understanding, and implementation of export laws that relate to the Zangger International Trigger List for gaseous diffusion uranium enrichment process components, equipment, and materials. Particular emphasis is focused on items that are especially designed or prepared since export controls are required for these by States that are party to the International Nuclear Nonproliferation Treaty.

  17. Diffusion method of seperating gaseous mixtures

    DOE Patents [OSTI]

    Pontius, Rex B. (Rochester, NY)

    1976-01-01T23:59:59.000Z

    A method of effecting a relatively large change in the relative concentrations of the components of a gaseous mixture by diffusion which comprises separating the mixture into heavier and lighter portions according to major fraction mass recycle procedure, further separating the heavier portions into still heavier subportions according to a major fraction mass recycle procedure, and further separating the lighter portions into still lighter subportions according to a major fraction equilibrium recycle procedure.

  18. Proposed Data Elements for PARS II Web Application | Department...

    Broader source: Energy.gov (indexed) [DOE]

    Proposed Data Elements for PARS II Web Application Proposed Data Elements for PARS II Web Application Proposed Data Elements for PARS II Web Application More Documents &...

  19. Band Formation during Gaseous Diffusion in Aerogels

    E-Print Network [OSTI]

    M. A. Einarsrud; F. A. Maao; A. Hansen; M. Kirkedelen; J. Samseth

    1997-06-18T23:59:59.000Z

    We study experimentally how gaseous HCl and NH_3 diffuse from opposite sides of and react in silica aerogel rods with porosity of 92 % and average pore size of about 50 nm. The reaction leads to solid NH_4Cl, which is deposited in thin sheet-like structures. We present a numerical study of the phenomenon. Due to the difference in boundary conditions between this system and those usually studied, we find the sheet-like structures in the aerogel to differ significantly from older studies. The influence of random nucleation centers and inhomogeneities in the aerogel is studied numerically.

  20. Gaseous Hydrogen Delivery | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy ChinaofSchaefer To: Congestion StudyForecasting. |October 3,andDepartmentGaseous hydrogen

  1. NGPL Production, Gaseous Equivalent at Processing Plants

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade1 Source: Office of FossilFoot) YearNGPL Production, Gaseous

  2. Thermal conductivity of graphene nanoribbons in noble gaseous environments

    SciTech Connect (OSTI)

    Zhong, Wei-Rong, E-mail: wrzhong@hotmail.com; Xu, Zhi-Cheng; Zheng, Dong-Qin [Department of Physics and Siyuan Laboratory, College of Science and Engineering, Jinan University, Guangzhou 510632 (China); Ai, Bao-Quan, E-mail: aibq@scnu.edu.cn [Laboratory of Quantum Information Technology, ICMP and SPTE, South China Normal University, Guangzhou 510006 (China)

    2014-02-24T23:59:59.000Z

    We investigate the thermal conductivity of suspended graphene nanoribbons in noble gaseous environments using molecular dynamics simulations. It is reported that the thermal conductivity of perfect graphene nanoribbons decreases with the gaseous pressure. The decreasing is more obvious for the noble gas with large atomic number. However, the gaseous pressure cannot change the thermal conductivity of defective graphene nanoribbons apparently. The phonon spectra of graphene nanoribbons are also provided to give corresponding supports.

  3. The automorphisms of affine fusion rings

    E-Print Network [OSTI]

    T. Gannon

    2000-02-07T23:59:59.000Z

    The fusion rings associated to affine Kac-Moody algebras appear in several different contexts in math and mathematical physics. In this paper we find all automorphisms of all affine fusion rings, or equivalently the symmetries of the corresponding fusion coefficients. Most of these are directly related to symmetries of the corresponding Coxeter-Dynkin diagram. We also find all pairs of isomorphic affine fusion rings.

  4. Orientation Visit to the Portsmouth Gaseous Diffusion Plant

    Office of Environmental Management (EM)

    Analysis (DSA) and Technical Safety Requirements (TSR) for Portsmouth Gaseous Diffusion Plant Category 2 Non-leased Facilities: X-345 Special Nuclear Material Storage Facility;...

  5. The Thermodynamics of Gaseous, Cuprous Chloride Monomer and Trimer

    E-Print Network [OSTI]

    Brewer, Leo

    2010-01-01T23:59:59.000Z

    No.W-7405-eng~48B TIiE THERMODYNAMICS OF GASEOUS" CUPROUSCu(s) + HCl::= I Thermodynamics of Vaporization to Monomeric

  6. Non-Destructive Analysis Calibration Standards for Gaseous Diffusion...

    Energy Savers [EERE]

    surrogates are required to verify and validate NDA methods used to support characterization of gaseous diffusion equipment within the D&D project. Because working reference...

  7. Structural determinants of sigma receptor affinity

    SciTech Connect (OSTI)

    Largent, B.L.; Wikstroem, H.G.; Gundlach, A.L.; Snyder, S.H.

    1987-12-01T23:59:59.000Z

    The structural determinants of sigma receptor affinity have been evaluated by examining a wide range of compounds related to opioids, neuroleptics, and phenylpiperidine dopaminergic structures for affinity at sigma receptor-binding sites labeled with (+)-(/sup 3/H)3-PPP. Among opioid compounds, requirements for sigma receptor affinity differ strikingly from the determinants of affinity for conventional opiate receptors. Sigma sites display reverse stereoselectivity to classical opiate receptors. Multi-ringed opiate-related compounds such as morphine and naloxone have negligible affinity for sigma sites, with the highest sigma receptor affinity apparent for benzomorphans which lack the C ring of opioids. Highest affinity among opioids and other compounds occurs with more lipophilic N-substituents. This feature is particularly striking among the 3-PPP derivatives as well as the opioids. The butyrophenone haloperidol is the most potent drug at sigma receptors we have detected. Among the series of butyrophenones, receptor affinity is primarily associated with the 4-phenylpiperidine moiety. Conformational calculations for various compounds indicate a fairly wide range of tolerance for distances between the aromatic ring and the amine nitrogen, which may account for the potency at sigma receptors of structures of considerable diversity. Among the wide range of structures that bind to sigma receptor-binding sites, the common pharmacophore associated with high receptor affinity is a phenylpiperidine with a lipophilic N-substituent.

  8. Software digitizer for high granular gaseous detector

    E-Print Network [OSTI]

    Y. Haddad; M. Ruan; V. Boudry

    2014-05-06T23:59:59.000Z

    A sampling calorimeter equipped with gaseous sensor layers with digital readout is near perfect for "Particle Flow Algorithm" approach, since it is homogeneous over large surfaces, robust, cost efficient, easily segmentable to any readout pad dimension and size and almost insensitive to neutrons. The response of a finely segmented digital calorimeter is characterized by track efficiency and multiplicity. Monte Carlo (MC) programs such as GEANT4 simulate with high precision the energy deposited by particles. The sensor and electronic response associated to a pad are calculated in a separate "digitization" process. We developed a general method for simulating the pad response, a digitization, reproducing efficiency and multiplicity, using the spatial information from a simulation done at higher granularity. The digitization method proposed here has been applied to gaseous detectors including Glass Resistive Plate Chambers (GRPC) and MicroMegas. Validating the method on test beam data, experimental observables such as efficiency, multiplicity and mean number of hits at different thresholds have been reproduced with high precision.

  9. CHALEUR D'ADSORPTION DES GAZ PAR LE CHARBON A BASSE TEMPERATURE (-183) Par REN LEPOINTE.

    E-Print Network [OSTI]

    Boyer, Edmond

    CHALEUR D'ADSORPTION DES GAZ PAR LE CHARBON A BASSE TEMPERATURE (- 183°) Par RENÉ LEPOINTE. Elève au début de l'adsorption que par la suite. L'hydrogène donne un phénomène thermique. Introduction. - De très nombreuses recherches ont été faites sur l'adsorption des gaz par le charbon de bois

  10. ~d'ordre: 164id prsente par

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    de propagation des pollutions par hydrocarbures en milieu souterrain - application au milieu alluvial des pollutions par hydrocarbures en milieu souterrain - application au milieu alluvial Soutenue le 14 pollutions accidentelles par hydrocarbures. Cetté méthodologie s'appuie sur l'intégra- tion d'outils de

  11. Par Pond Fish, Water, and Sediment Chemistry

    SciTech Connect (OSTI)

    Paller, M.H. [Westinghouse Savannah River Company, AIKEN, SC (United States); Wike, L.D.

    1996-06-01T23:59:59.000Z

    The objectives of this report are to describe the Par Pond fish community and the impact of the drawdown and refill on the community, describe contaminant levels in Par Pond fish, sediments, and water and indicate how contaminant concentrations and distributions were affected by the drawdown and refill, and predict possible effects of future water level fluctuations in Par Pond.

  12. Loop realizations of quantum affine algebras

    SciTech Connect (OSTI)

    Cautis, Sabin [Department of Mathematics, University of Southern California, Los Angeles, California, 90089 (United States); Licata, Anthony [Department of Mathematics, Australian National University, Canberra (Australia)

    2012-12-15T23:59:59.000Z

    We give a simplified description of quantum affine algebras in their loop presentation. This description is related to Drinfeld's new realization via halves of vertex operators. We also define an idempotent version of the quantum affine algebra which is suitable for categorification.

  13. Spectral modeling of gaseous metal disks around DAZ white dwarfs

    E-Print Network [OSTI]

    Barnstedt, Jürgen

    been found at G29-38, the hypothesis was put forward that a dust cloud around the white dwarf causesSpectral modeling of gaseous metal disks around DAZ white dwarfs Klaus Werner, Thorsten Nagel for the first non-LTE modeling of gaseous metal disks around single DAZ white dwarfs recently discovered by G

  14. 2011 GASEOUS IONS GORDON RESEARCH CONFERENCE

    SciTech Connect (OSTI)

    Scott Anderson

    2011-03-04T23:59:59.000Z

    The Gaseous Ions: Structures, Energetics and Reactions Gordon Research Conference will focus on ions and their interactions with molecules, surfaces, electrons, and light. The conference will cover theory and experiments, and systems ranging from molecular to biological to clusters to materials. The meeting goal continues to be bringing together scientists interested in fundamentals, with those applying fundamental phenomena to a wide range of practical problems. Each of the ten conference sessions will focus on a topic within this spectrum, and there will also be poster sessions for contributed papers, with sufficient space and time to allow all participants to present their latest results. To encourage active participation by young investigators, about ten of the poster abstracts will be selected for 15 minute 'hot topic' talks during the conference sessions. Hot topic selection will be done about a month before the meeting. Funds should be available to offset the participation cost for young investigators.

  15. Simulating the Gaseous Halos of Galaxies

    E-Print Network [OSTI]

    Tobias Kaufmann; James S. Bullock; Ari Maller; Taotao Fang

    2008-01-28T23:59:59.000Z

    Observations of local X-ray absorbers, high-velocity clouds, and distant quasar absorption line systems suggest that a significant fraction of baryons may reside in multi-phase, low-density, extended, ~100 kpc, gaseous halos around normal galaxies. We present a pair of high-resolution SPH (smoothed particle hydrodynamics) simulations that explore the nature of cool gas infall into galaxies, and the physical conditions necessary to support the type of gaseous halos that seem to be required by observations. The two simulations are identical other than their initial gas density distributions: one is initialized with a standard hot gas halo that traces the cuspy profile of the dark matter, and the other is initialized with a cored hot halo with a high central entropy, as might be expected in models with early pre-heating feedback. Galaxy formation proceeds in dramatically different fashions in these two cases. While the standard cuspy halo cools rapidly, primarily from the central region, the cored halo is quasi-stable for ~4 Gyr and eventually cools via the fragmentation and infall of clouds from ~100 kpc distances. After 10 Gyr of cooling, the standard halo's X-ray luminosity is ~100 times current limits and the resultant disk galaxy is twice as massive as the Milky Way. In contrast, the cored halo has an X-ray luminosity that is in line with observations, an extended cloud population reminiscent of the high-velocity cloud population of the Milky Way, and a disk galaxy with half the mass and ~50% more specific angular momentum than the disk formed in the low-entropy simulation. These results suggest that the distribution and character of halo gas provides an important testing ground for galaxy formation models and may be used to constrain the physics of galaxy formation.

  16. Affine braids, Markov traces and the category O Rosa Orellana

    E-Print Network [OSTI]

    Ram, Arun

    , affine BMW algebras, cyclotomic BMW algebras, Markov traces, Jacobi-Trudi type identities, dual pairs [Ze of affine braid groups of type A, (d) We define the affine BMW algebra (Birman-Murakami-Wenzl) and show

  17. Homological algebra for affine Hecke algebras

    E-Print Network [OSTI]

    Opdam, Eric

    2007-01-01T23:59:59.000Z

    In this paper we study homological properties of modules over an affine Hecke algebra H. In particular we prove a comparison result for higher extensions of tempered modules when passing to the Schwartz algebra S, a certain topological completion of the affine Hecke algebra. The proof is self-contained and based on a direct construction of a bounded contraction of certain standard resolutions of H-modules. This construction applies for all positive parameters of the affine Hecke algebra. This is an important feature since it is an ingredient to analyse how the irreducible discrete series representations of H arise in generic families over the parameter space of H. For irreducible non-simply laced affine Hecke algebras this will enable us to give a complete classification of the discrete series characters for all positive parameters (we will report on this application in a separate article).

  18. Diagrams of affine permutations and their labellings

    E-Print Network [OSTI]

    Yun, Taedong

    2013-01-01T23:59:59.000Z

    We study affine permutation diagrams and their labellings with positive integers. Balanced labellings of a Rothe diagram of a finite permutation were defined by Fomin- Greene-Reiner-Shimozono, and we extend this notion to ...

  19. Gaseous Detectors: recent developments and applications

    E-Print Network [OSTI]

    Maxim Titov

    2010-08-24T23:59:59.000Z

    Since long time, the compelling scientific goals of future high energy physics experiments were a driving factor in the development of advanced detector technologies. A true innovation in detector instrumentation concepts came in 1968, with the development of a fully parallel readout for a large array of sensing elements - the Multiwire Proportional Chamber (MWPC), which earned Georges Charpak a Nobel prize in physics in 1992. Since that time radiation detection and imaging with fast gaseous detectors, capable of economically covering large detection volume with low mass budget, have been playing an important role in many fields of physics. Advances in photo-lithography and micro-processing techniques in the chip industry during the past decade triggered a major transition in the field of gas detectors from wire structures to Micro-Pattern Gas Detector (MPGD) concepts, revolutionizing cell size limitations for many gas detector applications. The high radiation resistance and excellent spatial and time resolution make them an invaluable tool to confront future detector challenges at the next generation of colliders. The design of the new micro-pattern devices appears suitable for industrial production. Novel structures where MPGDs are directly coupled to the CMOS pixel readout represent an exciting field allowing timing and charge measurements as well as precise spatial information in 3D. Originally developed for the high energy physics, MPGD applications has expanded to nuclear physics, UV and visible photon detection, astroparticle and neutrino physics, neutron detection and medical physics.

  20. Combustion characteristics of alternative gaseous fuels

    SciTech Connect (OSTI)

    Park, O.; Veloo, Peter S.; Liu, N.; Egolfopoulos, Fokion N.

    2011-01-01T23:59:59.000Z

    Fundamental flame properties of mixtures of air with hydrogen, carbon monoxide, and C{sub 1}–C{sub 4} saturated hydrocarbons were studied both experimentally and numerically. The fuel mixtures were chosen in order to simulate alternative gaseous fuels and to gain insight into potential kinetic couplings during the oxidation of fuel mixtures. The studies included the use of the counterflow configuration for the determination of laminar flame speeds, as well as extinction and ignition limits of premixed flames. The experiments were modeled using the USC Mech II kinetic model. It was determined that when hydrocarbons are added to hydrogen flames as additives, flame ignition, propagation, and extinction are affected in a counterintuitive manner. More specifically, it was found that by substituting methane by propane or n-butane in hydrogen flames, the reactivity of the mixture is reduced both under pre-ignition and vigorous burning conditions. This behavior stems from the fact that propane and n-butane produce higher amounts of methyl radicals that can readily recombine with atomic hydrogen and reduce thus the rate of the H + O{sub 2} ? O + OH branching reaction. The kinetic model predicts closely the experimental data for flame propagation and extinction for various fuel mixtures and pressures, and for various amounts of carbon dioxide in the fuel blend. On the other hand, it underpredicts, in general, the ignition temperatures.

  1. Method for removing acid gases from a gaseous stream

    DOE Patents [OSTI]

    Gorin, Everett (San Rafael, CA); Zielke, Clyde W. (McMurray, PA)

    1981-01-01T23:59:59.000Z

    In a process for hydrocracking a heavy aromatic polynuclear carbonaceous feedstock containing reactive alkaline constituents to produce liquid hydrocarbon fuels boiling below about 475.degree. C. at atmospheric pressure by contacting the feedstock with hydrogen in the presence of a molten metal halide catalyst, thereafter separating a gaseous stream containing hydrogen, at least a portion of the hydrocarbon fuels and acid gases from the molten metal halide and regenerating the molten metal halide, thereby producing a purified molten metal halide stream for recycle to the hydrocracking zone, an improvement comprising; contacting the gaseous acid gas, hydrogen and hydrocarbon fuels-containing stream with the feedstock containing reactive alkaline constituents to remove acid gases from the acid gas containing stream. Optionally at least a portion of the hydrocarbon fuels are separated from gaseous stream containing hydrogen, hydrocarbon fuels and acid gases prior to contacting the gaseous stream with the feedstock.

  2. absorbing gaseous medium: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2001-01-01 17 Gravitational drag on a point mass in hypersonic motion through a gaseous medium CERN Preprints Summary: We explore a ballistic orbit model to infer the...

  3. Dissolved gaseous mercury behavior in shallow water estuaries

    E-Print Network [OSTI]

    Landin, Charles Melchor

    2009-05-15T23:59:59.000Z

    The formation of dissolved gaseous mercury (DGM) can be an important pathway for mercury removal from an aquatic environment. DGM evasional fluxes from an aquatic system can account for up to 95% of atmospheric Hg and its deposition pathways. While...

  4. Feasibility of gas-phase decontamination of gaseous diffusion equipment

    SciTech Connect (OSTI)

    Munday, E.B.; Simmons, D.W.

    1993-02-01T23:59:59.000Z

    The five buildings at the K-25 Site formerly involved in the gaseous diffusion process contain 5000 gaseous diffusion stages as well as support facilities that are internally contaminated with uranium deposits. The gaseous diffusion facilities located at the Portsmouth Gaseous Diffusion Plant and the Paducah Gaseous Diffusion Plant also contain similar equipment and will eventually close. The decontamination of these facilities will require the most cost-effective technology consistent with the criticality, health physics, industrial hygiene, and environmental concerns; the technology must keep exposures to hazardous substances to levels as low as reasonably achievable (ALARA). This report documents recent laboratory experiments that were conducted to determine the feasibility of gas-phase decontamination of the internal surfaces of the gaseous diffusion equipment that is contaminated with uranium deposits. A gaseous fluorinating agent is used to fluorinate the solid uranium deposits to gaseous uranium hexafluoride (UF[sub 6]), which can be recovered by chemical trapping or freezing. The lab results regarding the feasibility of the gas-phase process are encouraging. These results especially showed promise for a novel decontamination approach called the long-term, low-temperature (LTLT) process. In the LTLT process: The equipment is rendered leak tight, evacuated, leak tested, and pretreated, charged with chlorine trifluoride (ClF[sub 3]) to subatmospheric pressure, left for an extended period, possibly > 4 months, while processing other items. Then the UF[sub 6] and other gases are evacuated. The UF[sub 6] is recovered by chemical trapping. The lab results demonstrated that ClF[sub 3] gas at subatmospheric pressure and at [approx] 75[degree]F is capable of volatilizing heavy deposits of uranyl fluoride from copper metal surfaces sufficiently that the remaining radioactive emissions are below limits.

  5. Feasibility of gas-phase decontamination of gaseous diffusion equipment

    SciTech Connect (OSTI)

    Munday, E.B.; Simmons, D.W.

    1993-02-01T23:59:59.000Z

    The five buildings at the K-25 Site formerly involved in the gaseous diffusion process contain 5000 gaseous diffusion stages as well as support facilities that are internally contaminated with uranium deposits. The gaseous diffusion facilities located at the Portsmouth Gaseous Diffusion Plant and the Paducah Gaseous Diffusion Plant also contain similar equipment and will eventually close. The decontamination of these facilities will require the most cost-effective technology consistent with the criticality, health physics, industrial hygiene, and environmental concerns; the technology must keep exposures to hazardous substances to levels as low as reasonably achievable (ALARA). This report documents recent laboratory experiments that were conducted to determine the feasibility of gas-phase decontamination of the internal surfaces of the gaseous diffusion equipment that is contaminated with uranium deposits. A gaseous fluorinating agent is used to fluorinate the solid uranium deposits to gaseous uranium hexafluoride (UF{sub 6}), which can be recovered by chemical trapping or freezing. The lab results regarding the feasibility of the gas-phase process are encouraging. These results especially showed promise for a novel decontamination approach called the long-term, low-temperature (LTLT) process. In the LTLT process: The equipment is rendered leak tight, evacuated, leak tested, and pretreated, charged with chlorine trifluoride (ClF{sub 3}) to subatmospheric pressure, left for an extended period, possibly > 4 months, while processing other items. Then the UF{sub 6} and other gases are evacuated. The UF{sub 6} is recovered by chemical trapping. The lab results demonstrated that ClF{sub 3} gas at subatmospheric pressure and at {approx} 75{degree}F is capable of volatilizing heavy deposits of uranyl fluoride from copper metal surfaces sufficiently that the remaining radioactive emissions are below limits.

  6. Dissolved gaseous mercury behavior in shallow water estuaries

    E-Print Network [OSTI]

    Landin, Charles Melchor

    2008-10-10T23:59:59.000Z

    of dissolved gaseous mercury (DGM) can be an important pathway for mercury removal from an aquatic environment. DGM evasional fluxes from an aquatic system can account for up to 95% of atmospheric Hg and its deposition pathways. While this makes DGM.... Based on information obtained in freshwater systems, one can hypothesize that processes affecting DGM cycling are similar in estuarine systems. The hypothesis that was tested in this research is as follows: Dissolved gaseous mercury concentrations...

  7. university-logo Affine space forms and hyperbolic geometry

    E-Print Network [OSTI]

    Goldman, William

    university-logo Affine space forms and hyperbolic geometry 3-dimensional affine space forms Mathematics Department Colloquium University of Illinois, Chicago #12;university-logo Affine space forms one commensurability class. #12;university-logo Affine space forms and hyperbolic geometry Euclidean

  8. university-logo Affine space forms and hyperbolic geometry

    E-Print Network [OSTI]

    Goldman, William

    university-logo Affine space forms and hyperbolic geometry 3-dimensional affine space forms University of Singapore #12;university-logo Affine space forms and hyperbolic geometry Euclidean manifolds. #12;university-logo Affine space forms and hyperbolic geometry Euclidean manifolds When can a group G

  9. PARS II Data Quality Memorandum from Deputy Secretary Poneman...

    Office of Environmental Management (EM)

    PARS II Data Quality Memorandum from Deputy Secretary Poneman (June 19, 2012) PARS II Data Quality Memorandum from Deputy Secretary Poneman (June 19, 2012) PARS II Data Quality.pdf...

  10. avec modifications par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  11. amelioration par aromatherapie: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  12. aromatiques par impact: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  13. aqueuse par dynamique: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  14. analyse par spectrometrie: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  15. activity recall par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  16. aromatiques par spectrometrie: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  17. alimentation par convertisseurs: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  18. atomiques lies par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  19. analyse par activation: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  20. accords conclus par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  1. analyse par chromatographie: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  2. assistee par ordinateur: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  3. aerosol anthropogenique par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  4. au traitement par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  5. approche par homogeneisation: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  6. assistee par complexation: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  7. accumulator ring par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  8. absolu par diffraction: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  9. acceleration ionique par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  10. action research par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  11. atmospherique par scintillation: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  12. automatique par tout: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  13. activees par analyse: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  14. approche conceptuelle par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  15. anneaux par imagerie: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  16. autocatalytic recombiner par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  17. apres traitement par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  18. analyse instrumentale par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  19. atopoietique induit par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  20. The dynamics of metric-affine gravity

    SciTech Connect (OSTI)

    Vitagliano, Vincenzo, E-mail: vitaglia@sissa.it [SISSA-International School for Advanced Studies, Via Bonomea 265, 34136 Trieste (Italy); INFN, Sez. di Trieste, Via Valerio 2, 34127 Trieste (Italy); Sotiriou, Thomas P., E-mail: T.Sotiriou@damtp.cam.ac.uk [Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge, CB3 0WA (United Kingdom); Liberati, Stefano, E-mail: liberati@sissa.it [SISSA-International School for Advanced Studies, Via Bonomea 265, 34136 Trieste (Italy); INFN, Sez. di Trieste, Via Valerio 2, 34127 Trieste (Italy)

    2011-05-15T23:59:59.000Z

    Highlights: > The role and the dynamics of the connection in metric-affine theories is explored. > The most general second order action does not lead to a dynamical connection. > Including higher order invariants excites new degrees of freedom in the connection. > f(R) actions are also discussed and shown to be a non- representative class. - Abstract: Metric-affine theories of gravity provide an interesting alternative to general relativity: in such an approach, the metric and the affine (not necessarily symmetric) connection are independent quantities. Furthermore, the action should include covariant derivatives of the matter fields, with the covariant derivative naturally defined using the independent connection. As a result, in metric-affine theories a direct coupling involving matter and connection is also present. The role and the dynamics of the connection in such theories is explored. We employ power counting in order to construct the action and search for the minimal requirements it should satisfy for the connection to be dynamical. We find that for the most general action containing lower order invariants of the curvature and the torsion the independent connection does not carry any dynamics. It actually reduces to the role of an auxiliary field and can be completely eliminated algebraically in favour of the metric and the matter field, introducing extra interactions with respect to general relativity. However, we also show that including higher order terms in the action radically changes this picture and excites new degrees of freedom in the connection, making it (or parts of it) dynamical. Constructing actions that constitute exceptions to this rule requires significant fine tuned and/or extra a priori constraints on the connection. We also consider f(R) actions as a particular example in order to show that they constitute a distinct class of metric-affine theories with special properties, and as such they cannot be used as representative toy theories to study the properties of metric-affine gravity.

  1. Calculated structures and fluoride affinities for fluorides

    SciTech Connect (OSTI)

    O'Keeffe, M.

    1986-07-23T23:59:59.000Z

    It is shown that SCF-MO calculations provide good estimates of the energies of the processes MF/sub n/ ..-->.. M/sup n+/ + nF/sup -/ where M/sup n+/ is an ion of a first- or second-row element in a closed-shell or s/sup 2/ configuration. The fluoride ion affinities are then calculated for a number of molecules and ions. Where comparison with experiment is possible, the agreement is generally good when allowance is made for experimental uncertainties. In favorable cases, accurate heats of formation may be calculated from fluoride affinities.

  2. Simulink/PARS Integration Support

    SciTech Connect (OSTI)

    Vacaliuc, B. [ORNL] [ORNL; Nakhaee, N. [Sundance DSP, Inc.] [Sundance DSP, Inc.

    2013-12-18T23:59:59.000Z

    The state of the art for signal processor hardware has far out-paced the development tools for placing applications on that hardware. In addition, signal processors are available in a variety of architectures, each uniquely capable of handling specific types of signal processing efficiently. With these processors becoming smaller and demanding less power, it has become possible to group multiple processors, a heterogeneous set of processors, into single systems. Different portions of the desired problem set can be assigned to different processor types as appropriate. As software development tools do not keep pace with these processors, especially when multiple processors of different types are used, a method is needed to enable software code portability among multiple processors and multiple types of processors along with their respective software environments. Sundance DSP, Inc. has developed a software toolkit called “PARS”, whose objective is to provide a framework that uses suites of tools provided by different vendors, along with modeling tools and a real time operating system, to build an application that spans different processor types. The software language used to express the behavior of the system is a very high level modeling language, “Simulink”, a MathWorks product. ORNL has used this toolkit to effectively implement several deliverables. This CRADA describes this collaboration between ORNL and Sundance DSP, Inc.

  3. MAGNETIC STRUCTURE. ETUDE PAR EFFET MOSSBAUER

    E-Print Network [OSTI]

    Boyer, Edmond

    MAGNETIC STRUCTURE. ETUDE PAR EFFET MOSSBAUER DE QUELQUES PEROVSKITES D'YTTERBIUM P. BONVILLE, F effet Mossbauer sur 170Ybles perovskitesYbM03 (M = Fe, Cr, V) et YA103dopee en 170Yb, et par effet Mossbauer sur s7Fe, YbCr03 et YbVO3 dopees en 5 7Fe. La fonction d'onde fondamentalede Yb,+ dans YAlO et Yb

  4. N attribu par la bibliothque prsente

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , Signal présentée et soutenue publiquement par Héctor-Moisés VALDES-GONZALEZ Ingénieur électricien et MSc GENTIL Président M. Jean-Luc GOUZE Rapporteur M. José RAGOT Rapporteur M. Jean-Marie FLAUS Directeur de thèse M. Lionel BOILLEREAUX Examinateur M. Gonzalo ACU�A Examinateur Thèse préparée au sein de l

  5. Comptes Rendus des JNC 17 -Poitiers 2011 Simulation par lments finis des procds par infusion de rsine

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Comptes Rendus des JNC 17 - Poitiers 2011 Simulation par éléments finis des procédés par infusion de résine Finite Simulation of the liquid infusion processes G. Pacquaut, J. Bruchon, N. Moulin, S permettant de simuler par éléments finis les procé- dés par infusion de résine au travers de renforts fibreux

  6. An introduction to technetium in the gaseous diffusion cascades

    SciTech Connect (OSTI)

    Simmons, D.W.

    1996-09-01T23:59:59.000Z

    The radioisotope technetium-99 ({sup 99}Tc) was introduced into the gaseous diffusion plants (GDP) as a contaminant in uranium that had been reprocessed from spent nuclear reactor fuel. {sup 99}Tc is a product of the nuclear fission of uranium-235 ({sup 235}U). The significantly higher emitted radioactivity of {sup 99}Tc generates concern in the enrichment complex and warrants increased attention (1) to the control of all site emissions, (2) to worker exposures and contamination control when process equipment requires disassembly and decontamination, and (3) to product purity when the enriched uranium hexafluoride (UF{sub 6}) product is marketed to the private sector. A total of 101,268 metric tons of RU ({approximately}96% of the total) was fed at the Paducah Gaseous Diffusion Plant (PGDP) between FY1953 and FY1976. An additional 5600 metric tons of RU from the government reactors were fed at the Oak Ridge Gaseous Diffusion Plant (ORGDP), plus an approximate 500 tons of foreign reactor returns. Only a small amount of RU was fed directly at the Portsmouth Gaseous Diffusion Plant (PORTS). The slightly enriched PGDP product was then fed to either the ORGDP or PORTS cascades for final enrichment. Bailey estimated in 1988 that of the 606 kg of Tc received at PGDP from RU, 121 kg was subsequently re-fed to ORGDP and 85 kg re-fed to PORTS.

  7. MEASURING GASEOUS EMISSIONS FROM STORED PIG SLURRY S. Espagnol1

    E-Print Network [OSTI]

    Boyer, Edmond

    2 MEASURING GASEOUS EMISSIONS FROM STORED PIG SLURRY S. Espagnol1 , L. Loyon2 , F. Guiziou2 , P to measure emissions factors of ammonia (NH3), nitrous oxide (N2O) methane (CH4) and carbon dioxide (CO2) from stored pig slurry and measured the variations of the emissions in time and space. In 2006, dynamic

  8. Separation phenomenon in the Windowless Gaseous Tritium Source of KATRIN

    E-Print Network [OSTI]

    Sharipov, Felix

    Separation phenomenon in the Windowless Gaseous Tritium Source of KATRIN experiment. Ternary separa- tion. In the KATRIN experiment, in order to analyze the spectrum of electrons emmited by Tritium decay, it is very important to know the concentration distribution of Tritium along the source

  9. Test of potential homogeneity in the KATRIN gaseous tritium source

    E-Print Network [OSTI]

    M. Rysavy

    2005-06-02T23:59:59.000Z

    83mKr is supposed to be used to study the properties of the windowless gaseous tritium source of the experiment KATRIN. In this work we deduce the amount of 83mKr which is necessary to determine possible potential inhomogeneities via conversion-electron-line broadening.

  10. THE POSSIBILITY OF PRODUCING THERMONUCLEAR REACTIONS IN A GASEOUS DISCHARGE*

    E-Print Network [OSTI]

    THE POSSIBILITY OF PRODUCING THERMONUCLEAR REACTIONS IN A GASEOUS DISCHARGE* I.V. Kurchatov of the energy of thermonuclear reactions. Physicists the world over are attracted by the extraordinarily interest- ing and very difficult task of controlling thermonuclear reactiom. Investigations in this field

  11. Methods for deacidizing gaseous mixtures by phase enhanced absorption

    DOE Patents [OSTI]

    Hu, Liang

    2012-11-27T23:59:59.000Z

    An improved process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption is described. The process utilizes a multiphasic absorbent that absorbs an acid gas at increased rate and leads to reduced overall energy costs for the deacidizing operation.

  12. university-logo Complete affine 3-manifolds and hyperbolic

    E-Print Network [OSTI]

    Goldman, William

    university-logo Complete affine 3-manifolds and hyperbolic surfaces Dedicated to Bill Thurston and hyperbolic surfaces #12;university-logo Three-dimensional affine space forms When can a group G act;university-logo Three-dimensional affine space forms When can a group G act on Euclidean space with quotient

  13. Optimisation de procds de BIOdpollution des eaux souterraines contamines par des hydrocarbures par un monitoring

    E-Print Network [OSTI]

    Demouchy, Sylvie

    Optimisation de procédés de BIOdépollution des eaux souterraines contaminées par des hydrocarbures contaminés par des hydrocarbures. Ces outils doivent apporter des informations manquantes aux procédés de biodégradation aérobie d'hydrocarbures. Dans un second temps ces outils seront mis en oeuvre sur un site

  14. CONTRIBUTION A L'TUDE DES SOLUTIONS DE GAZ PAR SPECTROGRAPHIE INFRAROUGE Par Mlle G. PAILLARD.

    E-Print Network [OSTI]

    Boyer, Edmond

    disparaît en solution; il y a donc empêchement de la rotation par interactions moléculaires; 2° les ba ndes atmosphé- rique) à l'état de solution se traduisant par une augmentation des interactions moléculaires Perkin-Elmer : un spectrographe simple faisceau à prisme de fluorure de lithium dans la région 2 5oo-6 50

  15. Paducah Gaseous Diffusion Plant environmental report for 1992

    SciTech Connect (OSTI)

    Horak, C.M. [ed.] [Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)

    1993-09-01T23:59:59.000Z

    This two-part report, Paducah Gaseous Diffusion Plant Environmental Report for 1992, is published annually. It reflects the results of an environmental monitoring program designed to quantify potential increases in the concentration of contaminants and potential doses to the resident human population. The Paducah Gaseous Diffusion Plant (PGDP) overall goal for environmental management is to protect the environment and PGDP`s neighbors and to maintain full compliance with all current regulations. The current environmental strategy is to identify any deficiencies and to develop a system to resolve them. The long-range goal of environmental management is to minimize the source of pollutants, reduce the generation of waste, and minimize hazardous waste by substitution of materials.

  16. Method of producing gaseous products using a downflow reactor

    DOE Patents [OSTI]

    Cortright, Randy D; Rozmiarek, Robert T; Hornemann, Charles C

    2014-09-16T23:59:59.000Z

    Reactor systems and methods are provided for the catalytic conversion of liquid feedstocks to synthesis gases and other noncondensable gaseous products. The reactor systems include a heat exchange reactor configured to allow the liquid feedstock and gas product to flow concurrently in a downflow direction. The reactor systems and methods are particularly useful for producing hydrogen and light hydrocarbons from biomass-derived oxygenated hydrocarbons using aqueous phase reforming. The generated gases may find used as a fuel source for energy generation via PEM fuel cells, solid-oxide fuel cells, internal combustion engines, or gas turbine gensets, or used in other chemical processes to produce additional products. The gaseous products may also be collected for later use or distribution.

  17. Paducah Gaseous Diffusion Plant Environmental report for 1990

    SciTech Connect (OSTI)

    Counce-Brown, D. (ed.)

    1991-09-01T23:59:59.000Z

    This two-part report, Paducah Gaseous Diffusion Plant Site Environmental Report for 1990, is published annually. It reflects the results of a comprehensive, year-round program to monitor the impact of operations at Paducah Gaseous Diffusion Plant (PGDP) on the area's groundwater and surface waters, soil, air quality, vegetation, and wildlife. In addition, an assessment of the effect of PGDP effluents on the resident human population is made. PGDP's overall goal for environmental management is to protect the environment and PGDP's neighbors and to maintain full compliance with all current regulations. The current environmental strategy is to identify any deficiencies and to develop a system to resolve them. The long-range goal of environmental management is to minimize the source of pollutants, to reduce the formation of waste, and to minimize hazardous waste by substitution of materials.

  18. Paducah Gaseous Diffusion Plant Annual Site Environmental Report for 1993

    SciTech Connect (OSTI)

    Not Available

    1994-10-01T23:59:59.000Z

    The purpose of this document is to summarize effluent monitoring and environmental surveillance results and compliance with environmental laws, regulations, and orders at the Paducah Gaseous Diffusion Plant (PGDP). Environmental monitoring at PGDP consists of two major activities: effluent monitoring and environmental surveillance. Effluent monitoring is direct measurement or the collection and analysis of samples of liquid and gaseous discharges to the environment. Environmental surveillance is direct measurement or the collection and analysis of samples of air, water, soil, foodstuff, biota, and other media. Environmental monitoring is performed to characterize and quantify contaminants, assess radiation exposures of members of the public, demonstrate compliance with applicable standards and permit requirements, and detect and assess the effects (if any) on the local environment. Multiple samples are collected throughout the year and are analyzed for radioactivity, chemical content, and various physical attributes.

  19. Chapter 4 The Gaseous State Chemistry of Gases

    E-Print Network [OSTI]

    Ihee, Hyotcherl

    .15 V = V0[1+(t/273.15oC)] Kelvin T = 273.15 + t(Celsius) #12;Boyle's Law · The stirling engine, a heatChapter 4 The Gaseous State NO2 #12;AIR #12;Chemistry of Gases SO3 .. corrosive gas SO2...burning) ~1760 Charle The definition of the Temperature All gases expand with increasing temperature by the same

  20. Origin of gaseous hydrocarbons in east-central Texas groundwaters

    E-Print Network [OSTI]

    Coffman, Bryan Keith

    1988-01-01T23:59:59.000Z

    ; Follett, 1974). The high transmissivity and sandy lithology of the Sparta are much like those of the Queen City, as is the quality of water. 40 LIGNITE STREAKS 30 Laminated and discontinuous lenticular. Trough cross bedded siltstones. 20 ROAD l... hydrocarbons simply reflects a difference in the 5 C of the substrate. Sparta lignite is about 7%%do enriched in ' C relative to Yegua lignite, comparable to the difference seen in the gaseous hydrocarbons. ACKNOWLEDGMENTS I would like to thank Dr. Steven...

  1. Method and apparatus for analyzing particle-containing gaseous suspensions

    DOE Patents [OSTI]

    Solomon, Peter R. (West Hartford, CT); Carangelo, Robert M. (Coventry, CT); Best, Philip E. (Mansfield, CT)

    1987-01-01T23:59:59.000Z

    The method and apparatus permit analyses, by optical means, of properties of gaseous suspensions of particles, by measuring radiation that is emitted, transmitted or scattered by the particles. Determinations of composition, size, temperature and spectral emittance can be performed either in-situ or by sampling, and Fourier-transform infrared spectrometric techniques are most effectively used. Apparatus specifically adapted for performing radiation scattering analyses, and for collecting radiation from different sources, are provided.

  2. Method and apparatus for analyzing particle-containing gaseous suspensions

    DOE Patents [OSTI]

    Solomon, P.R.; Carangelo, R.M.; Best, P.E.

    1987-03-24T23:59:59.000Z

    The method and apparatus permit analyses, by optical means, of properties of gaseous suspensions of particles, by measuring radiation that is emitted, transmitted or scattered by the particles. Determinations of composition, size, temperature and spectral emittance can be performed either in-situ or by sampling, and Fourier-transform infrared spectrometric techniques are most effectively used. Apparatus specifically adapted for performing radiation scattering analyses, and for collecting radiation from different sources, are provided. 51 figs.

  3. Overview of seismic considerations at the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Hunt, R.J.; Stoddart, W.C.; Burnett, W.A.; Beavers, J.E.

    1992-10-01T23:59:59.000Z

    This paper presents an overview of seismic considerations at the Paducah Gaseous Diffusion Plant (PGDP), which is managed by Martin Marietta Energy Systems, Inc., for the Department of Energy (DOE). The overview describes the original design, the seismic evaluations performed for the Safety Analysis Report (SAR) issued in 1985, and current evaluations and designs to address revised DOE requirements. Future plans to ensure changes in requirements and knowledge are addressed.

  4. Process and composition for drying of gaseous hydrogen halides

    DOE Patents [OSTI]

    Tom, Glenn M. (New Milford, CT); Brown, Duncan W. (Wilton, CT)

    1989-08-01T23:59:59.000Z

    A process for drying a gaseous hydrogen halide of the formula HX, wherein X is selected from the group consisting of bromine, chlorine, fluorine, and iodine, to remove water impurity therefrom, comprising: contacting the water impurity-containing gaseous hydrogen halide with a scavenger including a support having associated therewith one or more members of the group consisting of: (a) an active scavenging moiety selected from one or more members of the group consisting of: (i) metal halide compounds dispersed in the support, of the formula MX.sub.y ; and (ii) metal halide pendant functional groups of the formula -MX.sub.y-1 covalently bonded to the support, wherein M is a y-valent metal, and y is an integer whose value is from 1 to 3; (b) corresponding partially or fully alkylated compounds and/or pendant functional groups, of the metal halide compounds and/or pendant functional groups of (a); wherein the alkylated compounds and/or pendant functional groups, when present, are reactive with the gaseous hydrogen halide to form the corresponding halide compounds and/or pendant functional groups of (a); and M being selected such that the heat of formation, .DELTA.H.sub.f of its hydrated halide, MX.sub.y.(H.sub.2 O).sub.n, is governed by the relationship: .DELTA.H.sub.f .gtoreq.n.times.10.1 kilocalories/mole of such hydrated halide compound wherein n is the number of water molecules bound to the metal halide in the metal halide hydrate. Also disclosed is an appertaining scavenger composition and a contacting apparatus wherein the scavenger is deployed in a bed for contacting with the water impurity-containing gaseous hydrogen halide.

  5. Affinity Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlinPapersWindeySanta2004) | OpenInformationAffinity Wind Farm Jump

  6. Infrared scintillation yield in gaseous and liquid argon

    E-Print Network [OSTI]

    A. Buzulutskov; A. Bondar; A. Grebenuk

    2011-04-19T23:59:59.000Z

    The study of primary and secondary scintillations in noble gases and liquids is of paramount importance to rare-event experiments using noble gas media. In the present work, the scintillation yield in gaseous and liquid Ar has for the first time been measured in the near infrared (NIR) and visible region, both for primary and secondary (proportional) scintillations, using Geiger-mode avalanche photodiodes (G-APDs) and pulsed X-ray irradiation. The primary scintillation yield of the fast component was measured to be 17000 photon/MeV in gaseous Ar in the NIR, in the range of 690-1000 nm, and 510 photon/MeV in liquid Ar, in the range of 400-1000 nm. Proportional NIR scintillations (electroluminescence) in gaseous Ar have been also observed; their amplification parameter at 163 K was measured to be 13 photons per drifting electron per kV. Possible applications of NIR scintillations in high energy physics experiments are discussed.

  7. Onsite Gaseous Centrifuge Enrichment Plant UF6 Cylinder Destructive Analysis

    SciTech Connect (OSTI)

    Anheier, Norman C.; Cannon, Bret D.; Qiao, Hong (Amy) [Amy; Carter, Jennifer C.; McNamara, Bruce K.; O'Hara, Matthew J.; Phillips, Jon R.; Curtis, Michael M.

    2012-07-17T23:59:59.000Z

    The IAEA safeguards approach for gaseous centrifuge enrichment plants (GCEPs) includes measurements of gross, partial, and bias defects in a statistical sampling plan. These safeguard methods consist principally of mass and enrichment nondestructive assay (NDA) verification. Destructive assay (DA) samples are collected from a limited number of cylinders for high precision offsite mass spectrometer analysis. DA is typically used to quantify bias defects in the GCEP material balance. Under current safeguards measures, the operator collects a DA sample from a sample tap following homogenization. The sample is collected in a small UF6 sample bottle, then sealed and shipped under IAEA chain of custody to an offsite analytical laboratory. Current practice is expensive and resource intensive. We propose a new and novel approach for performing onsite gaseous UF6 DA analysis that provides rapid and accurate assessment of enrichment bias defects. DA samples are collected using a custom sampling device attached to a conventional sample tap. A few micrograms of gaseous UF6 is chemically adsorbed onto a sampling coupon in a matter of minutes. The collected DA sample is then analyzed onsite using Laser Ablation Absorption Ratio Spectrometry-Destructive Assay (LAARS-DA). DA results are determined in a matter of minutes at sufficient accuracy to support reliable bias defect conclusions, while greatly reducing DA sample volume, analysis time, and cost.

  8. Cas clinique Pneumopathie induite par l'hydroxyure

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    'un traitement par hydroxyurée pour une fièvre élevée, une toux et des expectorations muqueuses associées à des

  9. CHAMBRE A TINCELLES CYLINDRIQUE A FILS AVEC ENREGISTREMENT PAR FERRITES

    E-Print Network [OSTI]

    Boyer, Edmond

    lues sur chaque matrice, par groupe de 32 en 8 fois chacune. L'enre- FIG. 3. Acquisition des données

  10. prsente par VOLPE Pierre-Nicolas

    E-Print Network [OSTI]

    Boyer, Edmond

    THESE présentée par VOLPE Pierre-Nicolas Pour obtenir le grade de Docteur de l'Université Joseph Science (Tsukuba, Japon) Soutenue le 19 Octobre 2009 Composition du Jury : (Rapporteur) Jocelyn Achard) Pierre Muret (Co-Directeur de thèse) Franck Omnès (Co-Directeur de thèse) Julien Pernot tel-00436438

  11. MONITORING GEOCHIMIQUE PAR COUPLAGE ENTRE LES GAZ

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    on its use. Key words: Geological sequestration of CO2, monitoring, noble gases, carbon isotopes1 MONITORING GEOCHIMIQUE PAR COUPLAGE ENTRE LES GAZ RARES ET LES ISOTOPES DU CARBONE : ETUDE D GAZ RARES ET LES ISOTOPES DU CARBONE : ETUDE D'UN RESERVOIR NATUREL Présentée devant : L

  12. Squestration biologique du carbone par les cyanobactries

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . ______________________________________________________________________________________________________ TITRE en anglais Biological carbon sequestration by cyanobacteria1 Séquestration biologique du carbone par les cyanobactéries THESE PRESENTEE POUR L'OBTENTION DU, qui peuvent fixer du CO2 sous forme de biomasse et carbonate de calcium. Ce dernier, insoluble dans l

  13. AGirenPArTenAriAT despartenariats

    E-Print Network [OSTI]

    la gestion des écosystèmes majeurs de la région1 . Le séminaire Les intérieurs du Maroc a par'Institut national de recherche halieutique au Maroc,l'�colenationaled'ingénieursdeTunisoul'Institutnatio- nal

  14. INSTITUT NATIONAL POLYTECHNIQUE DE GRENOBLE N attribu par la bibliothque

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ou friction stir welding (FSW) 4 A-1 Principe du soudage par friction malaxage (friction stir welding septembre 2004 Titre : Genèse des microstructures lors du soudage par friction malaxage d'alliages d MATIERES i INTRODUCTION 1 CHAPITRE I. Etude bibliographique 4 A. Procédé de soudage par friction malaxage

  15. Asservissement par PID Application du PWM au pont en H

    E-Print Network [OSTI]

    Tardieu, Samuel

    Plan Asservissement par PID PWM Ponts en H Application du PWM au pont en H Bibliographie Asservissement par PID, PWM et Ponts en H Siwar, Cédric, Samuel Télécom Paristech 4 mars 2011 Siwar, Cédric, Samuel ROSE 1 / 33 4 mars 2011 #12;Plan Asservissement par PID PWM Ponts en H Application du PWM au pont

  16. affinity binding studies: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Ligand Binding Affinity Prediction Chemistry Websites Summary: of the binding free energy between a ligand and a protein is an important component in the virtual...

  17. NOMBRE DE RAYONS 03B1 MIS PAR UNE PRPARATION DE DPOT ACTIF DU THORIUM MESURE PAR SON RAYONNEMENT PNTRANT

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    NOMBRE DE RAYONS 03B1 ÉMIS PAR UNE PRÉPARATION DE DÉPOT ACTIF DU THORIUM MESURÉE PAR SON cm de Pb. Résultats. 1. But du travail. - Le Radiothorium, le Thorium X et le dépôt actif du Thorium sont généralement dosés par leur rayonnement y provenant de Thorium (C + Cfl). A cet effet, à l

  18. Grant Title: DISSEMINATION AND IMPLEMENTATION RESEARCH IN HEALTH (R01, R03, R21) Funding Opportunity Number: PAR-13-055, PAR-13-056, PAR-13-054. CFDA Number(s): 93.242, 93.399,

    E-Print Network [OSTI]

    Farritor, Shane

    Opportunity Number: PAR-13-055, PAR-13-056, PAR-13-054. CFDA Number(s): 93.242, 93.399, 93.213, 93.172, 93

  19. Portsmouth Gaseous Diffusion Plant environmental report for 1991

    SciTech Connect (OSTI)

    Williams, M.F. (ed.)

    1992-10-01T23:59:59.000Z

    This calendar year (CY) 1991 annual report on environmental surveillance of the US Department of Energy's (DOE's) Portsmouth Gaseous Diffusion Plant (PORTS) and its environs consists of two parts: narrative, summaries, and conclusions (Part 1), and data presentation (Part 2). Environmental-monitoring systems at PORTS include emission-monitoring networks for air and surface water discharges; waste sampling and characterization; and ambient-sampling networks for air, surface water, groundwater, drinking water, vegetation (cattle forage), food crops, fish, soil, creek and river sediments, and direct (gamma) radiation levels.

  20. Portsmouth Gaseous Diffusion Plant Environmental report for 1990

    SciTech Connect (OSTI)

    Counce-Brown, D. (ed.)

    1991-09-01T23:59:59.000Z

    This calendar year 1990 annual report on environmental surveillance of the US Department of Energy's (DOE's) Portsmouth Gaseous Diffusion Plant (PORTS) and its environs consists of two parts: the summary, discussion, and conclusions (Part 1) and the data presentation (Part 2). The objectives of this report are as follows: report 1990 monitoring data for the installation and its environs that may have been affected by operations on the plant site, provide reasonably detailed information about the plant site and plant operations, provide detailed information on input and assumptions used in all calculations, provide trend analyses (when appropriate) to indicate increases and decreases in environmental impact, and provide general information on plant quality assurance.

  1. Modified gaseous atmospheres for storage of beef, lamb and pork

    E-Print Network [OSTI]

    Davis, George Theodore

    1979-01-01T23:59:59.000Z

    ) ( Member ) (He d of Depar ent) December 1979 ABSTRACT Modified Gaseous Atmospheres for Storage of Bee f, Pork and Lamb (December 1979) George Theodore Davis III, B. S. , Texas AsM University Co-Chairmen of Advisory Committee: Dr. Z. L. Carpenter...MODIFIED G'~. ' . . OUS ATMOSPHERI. S FOR STORAGE OI REEF, I. PMB AND PORK A Thesis by GEORGE THEODORE DAVIS I II Submitted to thc. graduate college of Texas AsM University in partial fulfillment of the rec, u. 'rement fox the degree...

  2. NGPL Production, Gaseous Equivalent at Processing Plants (Summary)

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade1 Source: Office of FossilFoot) YearNGPL Production, Gaseous2,408

  3. Property:PotentialBiopowerGaseousGeneration | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal PwerPerkinsInformationInformationMarine/RiverlinePotentialBiopowerGaseousGeneration Jump

  4. Property:PotentialBiopowerGaseousMass | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal PwerPerkinsInformationInformationMarine/RiverlinePotentialBiopowerGaseousGeneration

  5. PIECEWISE AFFINE SYSTEMS CONTROLLABILITY AND HYBRID OPTIMAL CONTROL

    E-Print Network [OSTI]

    Rondepierre, Aude

    PIECEWISE AFFINE SYSTEMS CONTROLLABILITY AND HYBRID OPTIMAL CONTROL Aude Rondepierre Laboratoire de.Rondepierre@imag.fr Keywords: Piecewise affine hybrid systems, polyhedral sets, controllability, optimal control synthesis difficulty is actually the synthesis of optimal feedback, even not solved for linear systems, except in some

  6. On New Conformal Field Theories with Affine Fusion Rules

    E-Print Network [OSTI]

    Doron Gepner

    1999-05-07T23:59:59.000Z

    Some time ago, conformal data with affine fusion rules were found. Our purpose here is to realize some of these conformal data, using systems of free bosons and parafermions. The so constructed theories have an extended $W$ algebras which are close analogues of affine algebras. Exact character formulae is given, and the realizations are shown to be full fledged unitary conformal field theories.

  7. Test of a Multilayer Dose-Verification Gaseous Detector with Raster Scan Mode Proton Beams

    E-Print Network [OSTI]

    Lee, Kyong Sei; Han, Youngyih; Hong, Byungsik; Kang, Minho; Kim, Sang Yeol; Lee, Seunkyung; Park, Sung Keun

    2015-01-01T23:59:59.000Z

    A multilayer gaseous detector has been developed for the fast dose-verification measurements of raster-scan-mode therapeutic beams in particle therapy.

  8. Low energy consumption method for separating gaseous mixtures and in particular for medium purity oxygen production

    DOE Patents [OSTI]

    Jujasz, Albert J. (North Olmsted, OH); Burkhart, James A. (Olmsted Falls, OH); Greenberg, Ralph (New York, NY)

    1988-01-01T23:59:59.000Z

    A method for the separation of gaseous mixtures such as air and for producing medium purity oxygen, comprising compressing the gaseous mixture in a first compressor to about 3.9-4.1 atmospheres pressure, passing said compressed gaseous mixture in heat exchange relationship with sub-ambient temperature gaseous nitrogen, dividing the cooled, pressurized gaseous mixture into first and second streams, introducing the first stream into the high pressure chamber of a double rectification column, separating the gaseous mixture in the rectification column into a liquid oxygen-enriched stream and a gaseous nitrogen stream and supplying the gaseous nitrogen stream for cooling the compressed gaseous mixture, removing the liquid oxygen-enriched stream from the low pressure chamber of the rectification column and pumping the liquid, oxygen-enriched steam to a predetermined pressure, cooling the second stream, condensing the cooled second stream and evaporating the oxygen-enriched stream in an evaporator-condenser, delivering the condensed second stream to the high pressure chamber of the rectification column, and heating the oxygen-enriched stream and blending the oxygen-enriched stream with a compressed blend-air stream to the desired oxygen concentration.

  9. Kinetics of Heterogeneous Reaction of CaCO3 Particles with Gaseous...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Humidity. Abstract: Heterogeneous reaction kinetics of gaseous nitric acid (HNO3) with calcium carbonate (CaCO3) particles was investigated using the Particle-on-Substrate...

  10. Voluntary Protection Program Onsite Review, Infrastructure Support Contract Paducah Gaseous Diffusion Plant- March 2012

    Broader source: Energy.gov [DOE]

    Evaluation to determine whether the Infrastructure Support Contract Paducah Gaseous Diffusion Plant is continuing to perform at a level deserving DOE-VPP Star recognition.

  11. Application of gaseous disinfectants ozone and chlorine dioxide for inactivation of Bacillus subtilis spores

    E-Print Network [OSTI]

    Aydogan, Ahmet

    2006-01-01T23:59:59.000Z

    of gaseous ozone for MRSA decontamination of hospital side-H. ; Kamiki, T. , “Ozone decontamination of bioclean rooms”,Nelson, P.E. , “Decontamination of bacillus thuringiensis

  12. Voluntary Protection Program Onsite Review, Infrastructure Support Contract Paducah Gaseous Diffusion Plant- May 2013

    Broader source: Energy.gov [DOE]

    Evaluation to determine whether Infrastructure Support Contract Paducah Gaseous Diffusion Plant is continuing to perform at a level deserving DOE-VPP Star recognition.

  13. arXiv:1105.4207v1[math.RT]21May2011 Affine and degenerate affine BMW algebras: The center

    E-Print Network [OSTI]

    Ram, Arun

    arXiv:1105.4207v1[math.RT]21May2011 Affine and degenerate affine BMW algebras: The center Zajj and affine BMW algebras arise naturally in the context of Schur- Weyl duality for orthogonal and symplectic Lie algebras and quantum groups, respectively. Cyclotomic BMW algebras, affine Hecke algebras

  14. An In-Situ Ion Mobility Spectrometer Sensor System for Detecting Gaseous VOCs in Unsaturated Soils

    E-Print Network [OSTI]

    Baker, R. Jacob

    An In-Situ Ion Mobility Spectrometer Sensor System for Detecting Gaseous VOCs in Unsaturated Soils and will be ultimately equipped with water content, temperature, and pressure sensors. The proposed system is designed knowledge, an in-situ IMS for detection of subsurface gaseous VOCs has not been previously developed. VOCs

  15. Effect of gaseous cement industry effluents on four species of Amlie Talec a, b

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of gaseous cement industry effluents on four species of microalgae Amélie Talec a, b , Myrvline Philistin a the possibility to grow microalgae with CO2 from gaseous effluent of cement industry. Four microalgal species the composition of a typical Cement Flue Gas (CFG). In a second stage, the culture submitted to the CFG received

  16. Affinity+: Semi-Structured Brainstorming on Large Displays

    SciTech Connect (OSTI)

    Burtner, Edwin R.; May, Richard A.; Scarberry, Randall E.; LaMothe, Ryan R.; Endert, Alexander

    2013-04-27T23:59:59.000Z

    Affinity diagraming is a powerful method for encouraging and capturing lateral thinking in a group environment. The Affinity+ Concept was designed to improve the collaborative brainstorm process through the use of large display surfaces in conjunction with mobile devices like smart phones and tablets. The system works by capturing the ideas digitally and allowing users to sort and group them on a large touch screen manually. Additionally, Affinity+ incorporates theme detection, topic clustering, and other processing algorithms that help bring structured analytic techniques to the process without requiring explicit leadership roles and other overhead typically involved in these activities.

  17. Quantized gauge-affine gravity in the superfiber bundle approach

    E-Print Network [OSTI]

    A. Meziane; M. Tahiri

    2005-11-10T23:59:59.000Z

    The quantization of gauge-affine gravity within the superfiber bundle formalism is proposed. By introducing an even pseudotensorial 1-superform over a principal superfibre bundle with superconnection, we obtain the geometrical Becchi-Rouet-Stora-Tyutin (BRST) and anti-BRST transformations of the fields occurring in such a theory. Reducing the four-dimensional general affine group double-covering to the Poincare group double-covering we also find the BRST and anti-BRST transformations of the fields present in Einstein's gravity. Furthermore, we give a prescription leading to the construction of both BRST-invariant gauge-fixing action for gauge-affine gravity and Einstein's gravity.

  18. Glycomimetic affinity-enrichment proteomics identifies partners for a clinically-utilized iminosugar

    E-Print Network [OSTI]

    Davis, Ben G.

    Glycomimetic affinity-enrichment proteomics identifies partners for a clinically and utilize a natural product-derived glycomimetic iminosugar probe in a Glycomimetic Affinity-enrichment

  19. Tiger Team Assessment of the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Not Available

    1990-07-01T23:59:59.000Z

    This document contains findings and concerns identified during the Tiger Team Assessment of the Department of Energy's (DOE) Paducah Gaseous Diffusion Plant (PGDP) in Paducah, Kentucky. The assessment was directed by the Department's Office of Environment, Safety and Health (ES H) and was conducted from June 18 to July 20, 1990. The PGDP Tiger Team Assessment is comprehensive in scope. It covers the Environmental, Safety and Health (including OSHA Compliance), and Management areas and determines the site's compliance with applicable federal (including DOE), state, and local regulations and requirements. The objective of the assessment program is to provide the Secretary with information on the current ES H compliance status of DOE facilities, root causation for noncompliance, adequacy of DOE and site contractor ES H management programs, response actions to address the identified problem areas, and DOE-wide ES H compliance trends and root causes.

  20. Seismic issues at the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Fricke, K.E. (Martin Marietta Energy Systems, Inc., Oak Ridge, TN (USA))

    1989-11-01T23:59:59.000Z

    A seismic expert workshop was held at the Paducah Gaseous Diffusion Plant (PGDP) on March 13--15, 1989. the PGDP is operated by Martin Marietta Energy Systems, Inc. for the United States Department of Energy (DOE). During the last twenty years the design criteria for natural phenomenon hazards has steadily become more demanding at all of the DOE Oak Ridge Operations (ORO) sites. The purpose of the two-day workshop was to review the seismic vulnerability issues of the PGDP facilities. Participants to the workshop included recognized experts in the fields of seismic engineering, seismology and geosciences, and probabilistic analysis, along with engineers and other personnel from Energy Systems. A complete list of the workshop participants is included in the front of this report. 29 refs.

  1. Spiral density waves in the outer galactic gaseous discs

    E-Print Network [OSTI]

    Khoperskov, S A

    2015-01-01T23:59:59.000Z

    Deep HI observations of the outer parts of disc galaxies demonstrate the frequent presence of extended, well-developed spiral arms far beyond the optical radius. To understand the nature and the origin of such outer spiral structure, we investigate the propagation in the outer gaseous disc of large-scale spiral waves excited in the bright optical disc. Using hydrodynamical simulations, we show that non-axisymmetric density waves, penetrating in the gas through the outer Lindblad resonance, can exhibit relatively regular spiral structures outside the bright optical stellar disc. For low-amplitude structures, the results of numerical simulations match the predictions of a simple WKB linear theory. The amplitude of spiral structure increases rapidly with radius. Beyond $\\approx 2$ optical radii, spirals become nonlinear (the linear theory becomes quantitatively and qualitatively inadequate) and unstable to Kelvin-Helmholtz instability. In numerical simulations, in models for which gas is available very far out, ...

  2. Spectral modeling of gaseous metal disks around DAZ white dwarfs

    E-Print Network [OSTI]

    K. Werner; T. Nagel; T. Rauch

    2008-09-30T23:59:59.000Z

    We report on our attempt for the first non-LTE modeling of gaseous metal disks around single DAZ white dwarfs recently discovered by Gaensicke et al. and thought to originate from a disrupted asteroid. We assume a Keplerian rotating viscous disk ring composed of calcium and hydrogen and compute the detailed vertical structure and emergent spectrum. We find that the observed infrared CaII emission triplet can be modeled with a hydrogen-deficient gas ring located at R=1.2 R_sun, inside of the tidal disruption radius, with Teff about 6000 K and a low surface mass density of about 0.3 g/cm**2. A disk having this density and reaching from the central white dwarf out to R=1.2 R_sun would have a total mass of 7 10**21 g, corresponding to an asteroid with about 160 km diameter.

  3. Paducah Gaseous Diffusion Plant environmental report for 1991

    SciTech Connect (OSTI)

    Williams, M.F. (ed.) (Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States))

    1992-10-01T23:59:59.000Z

    This two-part report is published annually. It reflects the results of an environmental monitoring program designed to quantify potential increases in the concentration of contaminants and potential doses to the resident human population from the Paducah Gaseous Diffusion Plant (PGDP). PGDP's overall goal for environmental management is to protect the environment and PGDP's neighbors and to maintain full compliance with all current regulations. The current environmental strategy is to identify any deficiencies and to develop a system to resolve them. The long-range goal of environmental management is to minimize the source of pollutants, to reduce the generation of waste, and to minimize hazardous waste by substitution of materials. Environmental-monitoring systems at PGDP include emission-monitoring networks for airborne and aqueous discharges, groundwater monitoring, solid waste characterization, and ambient-sampling networks for air, surface water, groundwater, vegetation, food crops, fish, wildlife, soil, and surface stream sediments.

  4. Tiger Team Assessment of the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Not Available

    1990-07-01T23:59:59.000Z

    This document contains findings and concerns identified during the Tiger Team Assessment of the Department of Energy's (DOE's) Paducah Gaseous Diffusion Plant (PGDP) in Paducah, Kentucky. The assessment was directed by the Department's Office of Environment, Safety and Health (ES H) and was conducted from June 18 to July 20, 1990. The PGDP Tiger Team Assessment is comprehensive in scope. It covers the Environmental, Safety and Health (including OSHA Compliance), and Management areas and determines the site's compliance with applicable federal (including DOE), state, and local regulations and requirements. The objective of the assessment program is to provide the Secretary with information on the current ES H compliance status of DOE facilities, root causation for noncompliance, adequacy of DOE and site contractor ES H management programs, response actions to address the identified problem areas, and DOE-wide ES H compliance trends and root causes. This volume contains appendices.

  5. Gaseous diffusion plant transition from DOE to external regulation

    SciTech Connect (OSTI)

    Dann, R.K.; Crites, T.R.; Rahm-Crites, L.K. [Lawrence Livermore National Lab., CA (United States)

    1997-12-01T23:59:59.000Z

    After many years of operation as government-owned/contractor-operated facilities, large portions of the gaseous diffusion plants (GDPs) at Portsmouth, Ohio, and Paducah, Kentucky, were leased to the United States Enrichment Corporation (USEC). These facilities are now certified by the U.S. Nuclear Regulatory Commission (NRC) and subject to oversight by the Occupational Safety and Health Administration (OSHA). The transition from DOE to NRC regulation was more difficult than expected. The original commitment was to achieve NRC certification in October 1995; however, considerably more time was required and transition-related costs escalated. The Oak Ridge Operations Office originally estimated the cost of transition at $60 million; $240 million has been spent to date. The DOE`s experience in transitioning the GDPs to USEC operation with NRC oversight provides valuable lessons (both positive and negative) that could be applied to future transitions.

  6. Paducah Gaseous Diffusion Plant environmental report for 1989

    SciTech Connect (OSTI)

    Turner, J.W. (ed.) (Martin Marietta Energy Systems, Inc., Oak Ridge, TN (USA))

    1990-10-01T23:59:59.000Z

    This two-part environmental report is published annually. It reflects the results of a comprehensive, year-round program to monitor the impact of operations at Paducah Gaseous Diffusion Plant (PGDP) on the area's groundwater and surface waters, soil, air quality, vegetation, and wildlife. In addition, an assessment of the effect of PGDP effluents on the resident human population is made. PGDP's overall goal for environmental management is to protect the environment and PGDP's neighbors and to maintain full compliance with all current regulations. The current environmental strategy is to identify any deficiencies and to develop a system to resolve them. The long-range goal of environmental management is to minimize the source of pollutants, to reduce the formation of waste, and to minimize hazardous waste by substitution of materials. 36 refs.

  7. Paducah Gaseous Diffusion Plant environmental report for 1991. Volume 3

    SciTech Connect (OSTI)

    Williams, M.F. [ed.] [Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)

    1992-10-01T23:59:59.000Z

    This two-part report is published annually. It reflects the results of an environmental monitoring program designed to quantify potential increases in the concentration of contaminants and potential doses to the resident human population from the Paducah Gaseous Diffusion Plant (PGDP). PGDP`s overall goal for environmental management is to protect the environment and PGDP`s neighbors and to maintain full compliance with all current regulations. The current environmental strategy is to identify any deficiencies and to develop a system to resolve them. The long-range goal of environmental management is to minimize the source of pollutants, to reduce the generation of waste, and to minimize hazardous waste by substitution of materials. Environmental-monitoring systems at PGDP include emission-monitoring networks for airborne and aqueous discharges, groundwater monitoring, solid waste characterization, and ambient-sampling networks for air, surface water, groundwater, vegetation, food crops, fish, wildlife, soil, and surface stream sediments.

  8. METAL TRANSPORT TO THE GASEOUS OUTSKIRTS OF GALAXIES

    SciTech Connect (OSTI)

    Werk, J. K. [Department of Astronomy, University of Michigan, 500 Church St., Ann Arbor, MI 48109 (United States); Putman, M. E.; Santiago-Figueroa, N. [Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027 (United States); Meurer, G. R., E-mail: jwerk@ucolick.org [ICRAR/University of Western Australia, 35 Stirling Highway, Crawley, WA 6009 (Australia)

    2011-07-10T23:59:59.000Z

    We present a search for outlying H II regions in the extended gaseous outskirts of nearby (D < 40 Mpc) galaxies and subsequent multi-slit spectroscopy used to obtain the H II region nebular oxygen abundances. The galaxies in our sample have extended H I disks and/or interaction-related H I features that extend well beyond their primary stellar components. We report oxygen abundance gradients out to 2.5 times the optical radius for these galaxies which span a range of morphologies and masses. We analyze the underlying stellar and neutral H I gas distributions in the vicinity of the H II regions to understand the physical processes that give rise to the observed metal distributions in galaxies. These measurements, for the first time, convincingly show flat abundance distributions out to large radii in a wide variety of systems and have broad implications for galaxy chemodynamical evolution.

  9. Portsmouth Gaseous Diffusion Plant annual site environmental report for 1993

    SciTech Connect (OSTI)

    Horak, C.M. [ed.

    1994-11-01T23:59:59.000Z

    This calendar year (CY) 1993 annual report on environmental monitoring of the US Department of Energy`s (DOE`s) Portsmouth Gaseous Diffusion Plant (Portsmouth) and its environs consists of three separate documents: a summary pamphlet for the general public; a more detail discussion and of compliance status, data, and environmental impacts (this document); and a volume of detailed data that is available on request. The objectives of this report are to report compliance status during 1993; provide information about the plant site and plant operations; report 1993 monitoring data for the installation and its environs that may have been affected by operations on the plant site; document information on input and assumptions used in calculations; provide trend analyses (where appropriate) to indicate increases and decreases in environmental impact, and provide general information on quality assurance for the environmental monitoring program.

  10. PEP TALK - Policy - EVMS - PARS Update - Mel Frank, Chief, Project...

    Broader source: Energy.gov (indexed) [DOE]

    and Project Management (APM) Glossary of Terms Handbook FINAL VERSION 9-30-2014 Earned Value (EV) Analysis and Project Assessment & Reporting System (PARS II) - APM Road...

  11. Gaseous and particulate emissions from a DC arc melter

    SciTech Connect (OSTI)

    Overcamp, T.J.; Speer, M.P.; Griner, S.J.; Cash, D.M. [Clemson Univ., Anderson, SC (United States)

    1997-12-31T23:59:59.000Z

    This paper presents the results of the gaseous and particulate emissions from eight experimental tests of a DC arc melter to treat simulated Savannah River soils contaminated with metals, surrogates for radionuclides, and organic debris. The gaseous analyses reported on the concentrations of oxygen, hydrogen, carbon monoxide, carbon dioxide, hydrogen, methane, nitric oxide, and nitrogen dioxide. The carbon dioxide concentration was high for all runs. For the runs with an air purge, the carbon monoxide concentration ranged up to 10% in the runs with the debris and 2% in the runs without debris. Hydrogen ranged up to 5% by with debris and up to 1% without debris. The methane concentration ranged up to 7,000 ppm{sub v} for the runs with debris and 2,000 ppm for the runs without debris. With a nitrogen purge, oxygen concentrations were less than 1%. The carbon dioxide concentrations ranged from 3 to 15%. Much of this carbon dioxide was probably due the carbonates added to the feed material. The carbon monoxide concentration ranged up to 20% with the debris and 7% without debris. Hydrogen was above 6% in with debris and up to 6% without debris. The methane concentration ranged up to 10,000 ppm{sub v} with debris and 4,000 ppm{sub v} without debris. The particulate concentrations exiting ranged from 32 to 145 g/m{sup 3}. From the chemical analyses, the primary elements were silicon and calcium. The CHN analyses indicated that carbon, probably as carbonates, are an additional component in the particulate matter. The estimated emissions were at a level of 3% or less for cerium, up to 7% for nickel, and 11 to 30% for cesium.

  12. Jupiter and Super-Earth embedded in a gaseous disc

    E-Print Network [OSTI]

    E. Podlewska; E. Szuszkiewicz

    2007-12-19T23:59:59.000Z

    In this paper we investigate the evolution of a pair of interacting planets - a Jupiter mass planet and a Super-Earth with the 5.5 Earth masses - orbiting a Solar type star and embedded in a gaseous protoplanetary disc. We focus on the effects of type I and II orbital migrations, caused by the planet-disc interaction, leading to the Super-Earth capture in first order mean motion resonances by the Jupiter. The stability of the resulting resonant system in which the Super-Earth is on the internal orbit relatively to the Jupiter has been studied numerically by means of full 2D hydrodynamical simulations. Our main motivation is to determine the Super-Earth behaviour in the presence of the gas giant in the system. It has been found that the Jupiter captures the Super-Earth into the interior 3:2 or 4:3 mean motion resonances and the stability of such configurations depends on the initial planet positions and eccentricity evolution. If the initial separation of planet orbits is larger or close to that required for the exact resonance than the final outcome is the migration of the pair of planets with the rate similar to that of the gas giant at least for time of our simulations. Otherwise we observe a scattering of the Super-Earth from the disc. The evolution of planets immersed in the gaseous disc has been compared with their behaviour in the case of the classical three-body problem when the disc is absent.

  13. PARS II Training Materials | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2:Introduction toManagementOPAM PolicyOfEnergyOutreach toOverviewOverview P - .PARS

  14. PAR and Supply Distribution System The PAR Program is administered by Materials Logistics (Central Distribution)

    E-Print Network [OSTI]

    Oliver, Douglas L.

    Logistics (Central Distribution) Services, a division of Materials Management. · The PAR Program is focused Administration: 1. See attached exhibit Models, 1-3 2. See Related Materials Management Forms 3. Weekly action group meeting(s) established to continue the work and ensuring good supply chain/materials management

  15. The Beilinson-Bernstein localization theorem for the affine Grassmannian

    E-Print Network [OSTI]

    Fortuna, Giorgia

    2013-01-01T23:59:59.000Z

    This thesis mainly deals with the study of the category of admissible modules for the affine Kac-Moody algebra at the critical level, and the study of its center.

  16. Optimality of Affine Policies in Multi-stage Robust Optimization

    E-Print Network [OSTI]

    Bertsimas, Dimitris J.

    In this paper, we prove the optimality of disturbance-affine control policies in the context of one-dimensional, constrained, multistage robust optimization. Our results cover the finite-horizon case, with minimax (worst-case) ...

  17. New tools for target identification by affinity chromatography 

    E-Print Network [OSTI]

    Landi, Felicetta

    2011-06-27T23:59:59.000Z

    The recovery of the selected biological material in affinity-based separations relies on reversing the biological interaction responsible for the binding. General elution methods which are independent of the bioaffinity ...

  18. aux etats-unis par: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  19. adp-ribose par immunoassay: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: , David Wessel, and Kathy Yelick UC Berkeley Par Lab End-of-Project Party May 30, 2013 12;BERKELEY PAR LAB Par Lab Timeline 2 Initial Meetings...

  20. APPLICATION DES PALIERS A GAZ AUX GYROSCOPES Par G. GOBERT,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    43 APPLICATION DES PALIERS A GAZ AUX GYROSCOPES Par G. GOBERT, Centre d'Études Nucléaires de Saclay. Résumé. 2014 L'étude des frottements dans les paliers à lubrification par gaz permet de cons- truire un avec, au centre, une turbine à réaction. Ces rotors sont placés entre deux butées coniques métalliques

  1. Feuilletage lisse de S5 par surfaces complexes

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Feuilletage lisse de S5 par surfaces complexes Smooth foliation of S5 by complex surfaces Guillaume´esum´e En 2002 Meersseman-Verjovsky [2] ont construit un feuilletage de codimension un de S5 par feuilles codimension un sur S5 avec une seule feuille compacte, ´etait optimal du point de vue du nombre de feuilles

  2. STRUCTURE DES COUCHES DE NIOBIUM PRPARES PAR PULVRISATION TRIODE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    415 STRUCTURE DES COUCHES DE NIOBIUM PRÉPARÉES PAR PULVÉRISATION TRIODE EXISTENCE D'UNE PHASE, Bellevue Résumé. 2014 Par pulvérisation cathodique, le niobium, normalement cubique centré (a = 3,29 Å. Abstract. 2014 Sputtering of normally b. c. c. Niobium (a = 3.29 Å) on Sodium Chloride gives amorphous

  3. Nuclear criticality safety aspects of gaseous uranium hexafluoride (UF{sub 6}) in the diffusion cascade

    SciTech Connect (OSTI)

    Huffer, J.E. [Parallax, Inc., Atlanta, GA (United States)

    1997-04-01T23:59:59.000Z

    This paper determines the nuclear safety of gaseous UF{sub 6} in the current Gaseous Diffusion Cascade and auxiliary systems. The actual plant safety system settings for pressure trip points are used to determine the maximum amount of HF moderation in the process gas, as well as the corresponding atomic number densities. These inputs are used in KENO V.a criticality safety models which are sized to the actual plant equipment. The ENO V.a calculation results confirm nuclear safety of gaseous UF{sub 6} in plant operations..

  4. Application of Gaseous Sphere Injection Method for Modeling Under-expanded H2 Injection

    SciTech Connect (OSTI)

    Whitesides, R; Hessel, R P; Flowers, D L; Aceves, S M

    2010-12-03T23:59:59.000Z

    A methodology for modeling gaseous injection has been refined and applied to recent experimental data from the literature. This approach uses a discrete phase analogy to handle gaseous injection, allowing for addition of gaseous injection to a CFD grid without needing to resolve the injector nozzle. This paper focuses on model testing to provide the basis for simulation of hydrogen direct injected internal combustion engines. The model has been updated to be more applicable to full engine simulations, and shows good agreement with experiments for jet penetration and time-dependent axial mass fraction, while available radial mass fraction data is less well predicted.

  5. Portsmouth Gaseous Diffusion Plant environmental report for 1989

    SciTech Connect (OSTI)

    Turner, J.W. (ed.) (Martin Marietta Energy Systems, Inc., Oak Ridge, TN (USA))

    1990-10-01T23:59:59.000Z

    This calendar year 1989 annual report on environmental surveillance of the US Department of Energy's (DOE) Portsmouth Gaseous Diffusion Plant (PORTS) and its environs consists of two parts: the Summary, Discussion, and Conclusions (Part 1) and the Data Presentation (Part 2). The objectives of this report are the following: report 1989 monitoring data for the installation and its environs that may have been affected by operations on the plant site, provide reasonably detailed information about the plant site and plant operations, provide detailed information on input and assumptions used in all calculations, provide trend analyses (where appropriate) to indicate increases and decreases in environmental impact, and provide general information on plant quality assurance. Routine monitoring and sampling for radiation, radioactive materials, and chemical substances on and off the DOE site are used to document compliance with appropriate standards, to identify trends, to provide information for the public, and to contribute to general environmental knowledge. The surveillance program assists in fulfilling the DOE policy of protecting the public, employees, and environment from harm that could be caused by its activities and reducing negative environmental impacts to the greatest degree practicable. Environmental-monitoring information complements data on specific releases, trends, and summaries. 26 refs.

  6. GASEOUS CO ABUNDANCE-AN EVOLUTIONARY TRACER FOR MOLECULAR CLOUDS

    SciTech Connect (OSTI)

    Liu Tie; Wu Yuefang; Zhang Huawei, E-mail: liutiepku@gmail.com, E-mail: ywu@pku.edu.cn [Department of Astronomy, Peking University, Beijing 100871 (China)

    2013-09-20T23:59:59.000Z

    Planck cold clumps are among the most promising objects to investigate the initial conditions of the evolution of molecular clouds. In this work, by combing the dust emission data from the survey of the Planck satellite with the molecular data of {sup 12}CO/{sup 13}CO/C{sup 18}O (1-0) lines from observations with the Purple Mountain Observatory 13.7 m telescope, we investigate the CO abundance, CO depletion, and CO-to-H{sub 2} conversion factor of 674 clumps in the early cold cores sample. The median and mean values of the CO abundance are 0.89 Multiplication-Sign 10{sup -4} and 1.28 Multiplication-Sign 10{sup -4}, respectively. The mean and median of CO depletion factor are 1.7 and 0.9, respectively. The median value of X{sub CO-to-H{sub 2}} for the whole sample is 2.8 Multiplication-Sign 10{sup 20} cm{sup -2} K{sup -1} km{sup -1} s. The CO abundance, CO depletion factor, and CO-to-H{sub 2} conversion factor are strongly (anti-)correlated to other physical parameters (e.g., dust temperature, dust emissivity spectral index, column density, volume density, and luminosity-to-mass ratio). To conclude, the gaseous CO abundance can be used as an evolutionary tracer for molecular clouds.

  7. Technique to study corrosion in fluctuating gaseous atmospheres

    SciTech Connect (OSTI)

    Ficalora, P.J.; Godfrey, T.G.

    1983-07-01T23:59:59.000Z

    The hot metal surfaces in a combustion system operating with an imperfect air-to-fuel mix experience a variation of corrosion potential. For example, the corrosion conditions can vary from reducing to oxidizing as the combustion conditions vary from rich to lean. This variation of conditions is particularly important in combustion systems utilizing sulfur-containing fuels since small variations in the sulfur partial pressure can cause catastrophic corrosion conditions. In an atmospheric fluidized-bed combustor (AFBC), coal is burned in the presence of a sulfur sorber, CaO or MgO. The alkaline oxide reacts with sulfur dioxide, the combustion product of the sulfur in the coal, to form the corresponding sulfate. Hence, the oxygen and sulfur dioxide partial pressures are controlled by the input conditions (air-coal ratio) as well as the sorption process. Figure 1 shows the observed variation of the oxygen partial pressure in an AFBC as a function of time and bed position. Clearly, fluctuations occur in a time interval of seconds, and the oxygen partial pressure can vary over approximately ten orders of magnitude. Corrosion in these fluctuating gaseous environments is being studied by measuring the resistance change of a heated metal filament specimen while it reacts with alternating oxidizing and sulfidizing gas pulses.

  8. Combustion characteristics of hydrogen - carbon monoxide-based gaseous fuels

    SciTech Connect (OSTI)

    White, D.J.; Kubasco, A.J.; Lecren, R.T.; Notardonato, J.J.

    1983-01-01T23:59:59.000Z

    An experimental rig program has been conducted with the objective of evaluating the combustion performance of a family of fuel gases based on a mixture of hydrogen and carbon monoxide. These gases, in addition to being members of a family, were also representative of those secondary fuels that could be produced from coal by various gasification schemes. In particular, simulated Winkler, Lurgi, and Blue-water low and medium energy content gases were used as fuels in the experimental combustor rig. The combustor used was originally designed as a low NOx rich-lean system for burning liquid fuels with high bound nitrogen levels. When used with the above gaseous fuels this combustor was operated in a lean-lean mode with ultra long residence times. The Bluewater gas was also operated in a rich-lean mode. The results of these tests indicate the possibility of the existence of an ''optimum'' gas turbine hydrogen - carbon monoxide based secondary fuel. Such a fuel would exhibit low NOx and high efficiency over the entire engine operating range. It would also have sufficient stability range to allow normal light-off and engine acceleration. Solar Turbines Incorporated would like to emphasize that the results presented here have been obtained with experimental rig combustors. The technologies generated could, however, be utilized in future commercial gas turbines.

  9. Partnering efforts at the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Warren, C.B. [Environmental Protection Agency, Atlanta, GA (United States)

    1995-12-31T23:59:59.000Z

    Before individuals or agencies can effectively work together to solve common problems, they must first agree on exactly what those problems are and establish common goals and methods that will lead to mutually acceptable solutions. Then, they must make a conscientious effort to form a cohesive team that focuses on the established goals and deemphasize traditional roles, which may in some instances be considered adversarial. This kind of teamwork/partnering process can be more difficult, though not impossible, to achieve in cases where there are traditional (real or imagined) adversarial relationships between the parties, i.e. regulator vs. regulated. The US Department of Energy Site Office (DOE) at Paducah, Kentucky, the Kentucky Department of Environmental Protection (KDEP) and the US Environmental Protection Agency, Region IV (EPA) have made t strides toward teamwork and partnering at DOE`s Paducah Gaseous Diffusion Plant. They have accomplished this in a number of ways, which will be discussed in greater detail but first and foremost, the agencies agreed up front that they had mutual goals and interests. These goals are to protect public health and the environment in a cost-effective and timely manner, taking care to make the wisest use of public resources (tax dollars); to evaluate and minimize risks, and to achieve ``Win-Win`` for all parties concerned.

  10. Bioavailability study for the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Phipps, T.L.; Kszos, L.A.

    1996-08-01T23:59:59.000Z

    The overall purpose of this plan is to assess the bioavailability of metals in the continuous and intermittent outfalls. The results may be used to determine alternative metal limits that more appropriately measure the portion of metal present necessary for toxicity to aquatic life. These limits must remain protective of in-stream aquatic life; thus, the highest concentration of metal in the water will be determined concurrently with an assessment of acute or chronic toxicity on laboratory tests. Using the method developed by the Kentucky Division of Water (KDOW), biomonitoring results and chemical data will be used to recommend alternative metal limits for the outfalls of concern. The data will be used to meet the objectives of the study: (1) evaluate the toxicity of continuous outfalls and intermittent outfalls at Paducah Gaseous Diffusion Plant; (2) determine the mean ratio of dissolved to Total Recoverable metal for Cd, Cr, Cu, Pb, Ni, and Zn in the continuous and intermittent outfalls; (3) determine whether the concentration of total recoverable metal discharged causes toxicity to fathead minnows and /or Ceriodaphnia; and (4) determine alternative metal limits for each metal of concern (Cd, Cr, Cu, Pb, Ni, and Zn).

  11. Radiation monitoring during criticality at a gaseous diffusion plant

    SciTech Connect (OSTI)

    Goebel, G.R.; Hines, T.W.; Carver, A.M.

    1994-12-31T23:59:59.000Z

    The Paducah gaseous diffusion plant (PGDP) has two systems of radiation detection units that monitor radiation associated with a nuclear criticality accident (NCA). The primary system, the criticality accident alarm system (CAAS), is composed of several detection units that alarm when gamma-radiation levels exceed 10 mR/h. The CAAS provides the means to initiate emergency-evacuation procedures in the event of an NCA. This system is augmented with a second system of radiation detectors, which is referred to as the argon gamma graph (AGG) system. The AGG system is utilized specifically for the remote monitoring of radiation during an NCA and is a primary tool used by emergency response personnel. The remote radiation readings supplied by the AGG system provide the means to quickly locate and characterize an NCA. The centralized remote monitoring of radiation during an NCA permits important data to be collected efficiently without subjecting personnel to unknown and unquantified radiation fields. Calculations of the expected radiation readings on the AGG system were performed for a postulated NCA at four different locations at PGDP.

  12. Paducah Gaseous Diffusion Plant Northwest Plume interceptor system evaluation

    SciTech Connect (OSTI)

    Laase, A.D.; Clausen, J.L.

    1998-07-01T23:59:59.000Z

    The Paducah Gaseous Diffusion Plant (PGDP) recently installed an interceptor system consisting of four wells, evenly divided between two well fields, to contain the Northwest Plume. As stated in the Northwest Plume Record of Decision (ROD), groundwater will be pumped at a rate to reduce further contamination and initiate control of the northwest contaminant plume. The objective of this evaluation was to determine the optimum (minimal) well field pumping rates required for plume hotspot containment. Plume hotspot, as defined in the Northwest Plume ROD and throughout this report, is that portion of the plume with trichloroethene (TCE) concentrations greater than 1,000 {micro}g/L. An existing 3-dimensional groundwater model was modified and used to perform capture zone analyses of the north and south interceptor system well fields. Model results suggest that the plume hotspot is not contained at the system design pumping rate of 100 gallons per minute (gal/min) per well field. Rather, the modeling determined that north and south well field pumping rates of 400 and 150 gal/min, respectively, are necessary for plume hotspot containment. The difference between the design and optimal pumping rates required for containment can be attributed to the discovery of a highly transmissive zone in the vicinity of the two well fields.

  13. Dispersal of Gaseous Circumstellar Discs around High-Mass Stars

    E-Print Network [OSTI]

    Yue Shen; Yu-Qing Lou

    2006-05-19T23:59:59.000Z

    We study the dispersal of a gaseous disc surrounding a central high-mass stellar core once this circumstellar disc becomes fully ionized. If the stellar and surrounding EUV and X-ray radiations are so strong as to rapidly heat up and ionize the entire circumstellar disc as further facilitated by disc magnetohydrodynamic (MHD) turbulence, a shock can be driven to travel outward in the fully ionized disc, behind which the disc expands and thins. For an extremely massive and powerful stellar core, the ionized gas pressure overwhelms the centrifugal and gravitational forces in the disc. In this limit, we construct self-similar shock solutions for such an expansion and depletion phase. As a significant amount of circumstellar gas being removed, the relic disc becomes vulnerable to strong stellar winds and fragments into clumps. We speculate that disc disappearance happens rapidly, perhaps on a timescale of $\\sim 10^3-10^4\\hbox{yr}$ once the disc becomes entirely ionized sometime after the onset of thermal nuclear burning in a high-mass stellar core.

  14. Liquid and Gaseous Waste Operations Department annual operating report, CY 1995

    SciTech Connect (OSTI)

    Maddox, J.J.; Scott, C.B.

    1996-03-01T23:59:59.000Z

    This report describes the operating activities, upgrade activities, maintenance, and other activities regarding liquid and gaseous low level radioactive waste management at the Oak Ridge National Laboratory. Miscellaneous activities include training, audits, tours, and environmental restoration support.

  15. Gaseous effluents from the combustion of nanocomposites in controlled-ventilation conditions

    E-Print Network [OSTI]

    Boyer, Edmond

    Gaseous effluents from the combustion of nanocomposites in controlled-ventilation conditions D on the combustion of nanocomposite samples under various ventilation conditions. Tests have been performed ammonium polyphosphate in equal proportions. During testing, the ventilation-controlled conditions were

  16. EA-1927: Conveyance of Land and Facilities at the Paducah Gaseous...

    Broader source: Energy.gov (indexed) [DOE]

    Office is preparing an EA for a proposal to convey DOE land and facilities at the Paducah Gaseous Diffusion Plant, to the Paducah Area Community Reuse Organization and potentially...

  17. Liquid and Gaseous Waste Operations Department Annual Operating Report, CY 1993

    SciTech Connect (OSTI)

    Maddox, J.J.; Scott, C.B.

    1994-02-01T23:59:59.000Z

    This report summarizes the activities of the waste management operations section of the liquid and gaseous waste operations department at ORNL for 1993. The process waste, liquid low-level waste, gaseous waste systems activities are reported, as well as the low-level waste solidification project. Upgrade activities is the various waste processing and treatment systems are summarized. A maintenance activity overview is provided, and program management, training, and other miscellaneous activities are covered.

  18. Method for selectively removing fluorine and fluorine-containing contaminants from gaseous UF.sub.6

    DOE Patents [OSTI]

    Jones, Robert L. (Paducah, KY); Otey, Milton G. (Melber, KY); Perkins, Roy W. (Mayfield, KY)

    1982-01-01T23:59:59.000Z

    This invention is a method for effecting preferential removal and immobilization of certain gaseous contaminants from gaseous UF.sub.6. The contaminants include fluorine and fluorides which are more reactive with CaCO.sub.3 than is UF.sub.6. The method comprises contacting the contaminant-carrying UF.sub.6 with particulate CaCO.sub.3 at a temperature effecting reaction of the contaminant and the CaCO.sub.3.

  19. Advanced Laser Diagnostics Development for the Characterization of Gaseous High Speed Flows

    E-Print Network [OSTI]

    Sanchez-Gonzalez, Rodrigo

    2012-07-16T23:59:59.000Z

    ADVANCED LASER DIAGNOSTICS DEVELOPMENT FOR THE CHARACTERIZATION OF GASEOUS HIGH SPEED FLOWS A Dissertation by RODRIGO SANCHEZ-GONZALEZ Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of DOCTOR OF PHILOSOPHY May 2012 Major Subject: Chemistry Advanced Laser Diagnostics Development for the Characterization of Gaseous High Speed Flows Copyright 2012 Rodrigo...

  20. Influences of Water Vapor on Cr(VI) Reduction by Gaseous Hydrogen

    E-Print Network [OSTI]

    Deng, Baolin

    Columbia, Columbia, Missouri 65211 In Situ Gaseous Reduction (ISGR) using hydrogen sulfide (H2S) is a technology the contaminants, H2S, and various soil components. In this study, Cr(VI) reduction by gaseous H2S was examined under various relative humidities (0-96.7%), concentrations of Cr(VI) (127-475 µg/g of solid), and H2S

  1. Development of a test facility for the experimental evaluation of liquid and gaseous automotive engine fuels

    E-Print Network [OSTI]

    McCanlies, John Michael

    1983-01-01T23:59:59.000Z

    for comparison of gaseous fuels. A 2. 3 liter, 4-cylinder engine was instrumented to obtain engine performance in terms of power output, efficiency, and exhaust emissions. Fuel supply systems were constructed to deliver and measure the f'lowrates of both... the liquid and gaseous fuels. Electrical signals proport onal to the ma?'or dependent and independent va, iables (except emissions) were input to a microcomputer based data acquisition system to provide con- tInuous display and recording. Stationary...

  2. Quantized gauge-affine gravity in the superfiber bundle approach

    SciTech Connect (OSTI)

    Meziane, A.; Tahiri, M. [Laboratoire de Physique Theorique, Universite d'Oran Es-senia, 31100 Oran (Algeria)

    2005-05-15T23:59:59.000Z

    The quantization of gauge-affine gravity within the superfiber bundle formalism is proposed. By introducing an even pseudotensorial 1-superform over a principal superfiber bundle with superconnection, we obtain the geometrical Becchi-Rouet-Stora-Tyutin (BRST) and anti-BRST transformations of the fields occurring in such a theory. Reducing the four-dimensional general affine group double-covering GA(4,R) to the Poincare group double-covering ISO(1,3) we also find the BRST and anti-BRST transformations of the fields present in Einstein's gravity. Furthermore, we give a prescription leading to the construction of both BRST-invariant gauge-fixing action for gauge-affine gravity and Einstein's gravity.

  3. Mixed waste storage facility CDR review, Paducah Gaseous Diffusion Plant; Solid waste landfill CDR review, Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    NONE

    1998-08-01T23:59:59.000Z

    This report consists of two papers reviewing the waste storage facility and the landfill projects proposed for the Paducah Gaseous Diffusion Plant complex. The first paper is a review of DOE`s conceptual design report for a mixed waste storage facility. This evaluation is to review the necessity of constructing a separate mixed waste storage facility. The structure is to be capable of receiving, weighing, sampling and the interim storage of wastes for a five year period beginning in 1996. The estimated cost is assessed at approximately $18 million. The review is to help comprehend and decide whether a new storage building is a feasible approach to the PGDP mixed waste storage problem or should some alternate approach be considered. The second paper reviews DOE`s conceptual design report for a solid waste landfill. This solid waste landfill evaluation is to compare costs and the necessity to provide a new landfill that would meet State of Kentucky regulations. The assessment considered funding for a ten year storage facility, but includes a review of other facility needs such as a radiation detection building, compactor/baler machinery, material handling equipment, along with other personnel and equipment storage buildings at a cost of approximately $4.1 million. The review is to help discern whether a landfill only or the addition of compaction equipment is prudent.

  4. LECTRISATION ET CONDUCTION LECTRIQUE DES HYDROCARBURES LIQUIDES par L. BRUNINGHAUS.

    E-Print Network [OSTI]

    Boyer, Edmond

    ÉLECTRISATION ET CONDUCTION ÉLECTRIQUE DES HYDROCARBURES LIQUIDES par L. BRUNINGHAUS. Sommaire. - I. Electrisation des hydrocarbures. - Les hydrocarbures liquides s'électrisent (négativement) lorsqu'ils s hydrocarbures. - Les hydrocarbures liquides mani- festent trois régimes de conduction : 1° En couches épaisses

  5. ADVISORY ALERT: Dekker, Ltd. Digital Signature - PARS II...

    Energy Savers [EERE]

    so that you may continue working with PARS II reports. Please note: Once you complete the process of accepting the Dekker, LTd. digital signature, this warning will not re-appear....

  6. INSTITUT NATIONAL POLYTECHNIQUE DE GRENOBLE attribu par la bibliothque

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    14 novembre 2006 Titre : Détection d'objets enfouis sur le fond marin par ondes sismo-acoustiques de'objets enfouis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Utilisation des ondes sismo-acoustiques de surface . . . . . . . . . . . . . . . . . 2 SONAR sismo

  7. The L Prize PAR 38 Competition: A New Start

    Broader source: Energy.gov [DOE]

    This March 27, 2012 webcast presented information on the newly reopened L Prize® PAR 38 competition. Moderated by James Brodrick, DOE Lighting Program Manager, the webcast featured an overview of...

  8. Molecular Cell High-Affinity Binding of Chp1 Chromodomain

    E-Print Network [OSTI]

    Halazonetis, Thanos

    Molecular Cell Article High-Affinity Binding of Chp1 Chromodomain to K9 Methylated Histone H3, Chp1, and siRNAs derived from centro- meric repeats. Recruitment of RITS to centromeres has been establishment. Our crystal structure of Chp1's chromodomain in complex with a trimethylated lysine 9 H3 peptide

  9. Linearization of affine connection control system David R. Tyner

    E-Print Network [OSTI]

    Lewis, Andrew D.

    Linearization of affine connection control system David R. Tyner 22/09/2002 Abstract A simple system. If these systems are underactuated then they do not provide a control- lable linearization about their equilibrium points. Without a controllable linearization it is not entirely clear how one should deriving

  10. Abstract Domains of Affine Relations , T. Sharma1

    E-Print Network [OSTI]

    Reps, Thomas W.

    , and stud- ies how they relate to each other. We show that the abstract domains of M¨uller-Olm/Seidl (MOS for affine-relation analysis (ARA)--one defined by M¨uller-Olm and Seidl (MOS) [19, 21] and one defined

  11. The Effects of Gaseous Ozone and Nitric Acid Deposition on two Crustose Lichen Species From Joshua Tree National Park

    E-Print Network [OSTI]

    Hessom, Elizabeth Curie

    2012-01-01T23:59:59.000Z

    photosynthetic rate responses to ozone in some foliose andof gaseous nitric acid and ozone on lichens. Dissertations &with nitric acid and ozone. Environmental Pollution, In

  12. EA-1856: Conveyance of Land and Facilities at the Portsmouth Gaseous Diffusion Plant for Economic Development Purposes, Piketon, Ohio

    Broader source: Energy.gov [DOE]

    This EA will evaluate the environmental impacts of conveyance of land and facilities at the Portsmouth Gaseous Diffusion Plant, in Piketon, Ohio, for economic development purposes.

  13. Conjugacy classes of involutive automorphisms of the $C_{\\ell}^{(1)}$ affine Kac-Moody algebras

    E-Print Network [OSTI]

    S. P. Clarke; J. F. Cornwell

    1994-10-03T23:59:59.000Z

    The conjugacy classes of the involutive automorphisms of the affine Kac-Moody algebras \\Cli\\ for $\\ell\\geq 2$ are determined using the matrix formulation of automorphisms of an affine Kac-Moody algebra.

  14. anisotropic self-affine properties: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    is called a self-affine tile if its Lebesgue Akiyama, Shigeki 6 Effect of self-affine fractal characteristics of surfaces on wetting Condensed Matter (arXiv) Summary: The relation...

  15. PRODUCTION DE TRITIUM DANS LE THORIUM PAR DES PROTONS DE 135 MeV Par M. LEFORT, G. SIMONOFF et X. TARRAGO

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    959 PRODUCTION DE TRITIUM DANS LE THORIUM PAR DES PROTONS DE 135 MeV Par M. LEFORT, G. SIMONOFF et thorium par des protons de 135 MeV accélérés au synchro-cyclotron d'Orsay. Le tritium était extrait des measured the cross-section of tritium production by bombardement of thorium by 135 MeV protons in the Orsay

  16. DTERMINATION PRCISE DE L'NERGIE DES RAYONS 03B1 EMIS PAR LE THORIUM Par M. GEORGES PHILBERT, Mme JEANNINE GNIN et M. LOPOLD VIGNERON,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    16 DÉTERMINATION PRÉCISE DE L'ÉNERGIE DES RAYONS 03B1 EMIS PAR LE THORIUM Par M. GEORGES PHILBERT. Sommaire. 2014 Du thorium, de l'ionium et du polonium ont été introduits ensemble dans une émulsion, les et autres nous ont permis de ne pas être gênés par les dérivés radioactifs du thorium. L

  17. Oak Ridge National Lebroatory Liquid&Gaseous Waste Treatment System Strategic Plan

    SciTech Connect (OSTI)

    Van Hoesen, S.D.

    2003-09-09T23:59:59.000Z

    Excellence in Laboratory operations is one of the three key goals of the Oak Ridge National Laboratory (ORNL) Agenda. That goal will be met through comprehensive upgrades of facilities and operational approaches over the next few years. Many of ORNL's physical facilities, including the liquid and gaseous waste collection and treatment systems, are quite old, and are reaching the end of their safe operating life. The condition of research facilities and supporting infrastructure, including the waste handling facilities, is a key environmental, safety and health (ES&H) concern. The existing infrastructure will add considerably to the overhead costs of research due to increased maintenance and operating costs as these facilities continue to age. The Liquid Gaseous Waste Treatment System (LGWTS) Reengineering Project is a UT-Battelle, LLC (UT-B) Operations Improvement Program (OIP) project that was undertaken to develop a plan for upgrading the ORNL liquid and gaseous waste systems to support ORNL's research mission.

  18. Transient model of an intermediate surge system for the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Beard, B.; Blankenship, J.G.; McGrady, P.W.

    1989-09-01T23:59:59.000Z

    Engineering design work (Reference 1) is underway for intermediate surge systems to be added to the Paducah Gaseous Diffusion Plant (PGDP) cascade as part of the Process Inventory Control System (PICS) project. These systems would be located between 000 buildings and lower half 00 buildings and would remove or add inventory during cascade transients in order to protect cascade compressors from overload and surge. Similar systems were operated in the Oak Ridge Gaseous Diffusion Plant cascade and are operated in the Portsmouth Gaseous Diffusion Plant cascade. A steady state flow analysis of the system to be installed at the PGDP has been made. The flow analysis did not address response of the surge system to the cascade transients, nor did it address automatic control of the system. The need to address these issues prompted development of the transient model described in this report. 2 refs., 8 figs., 2 tabs.

  19. On-line vibration and analysis system at the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Herricks, D.M.; Strunk, W.D.

    1988-02-01T23:59:59.000Z

    The enrichment facility in Paducah, KY uses a unique hard-wired vibration monitoring and analysis system for gaseous diffusion equipment. The axial flow and centrifugal flow compressors used in uranium enrichment range in size from 6 feet in diameter to less than one foot in diameter. These compressors must operate smoothly and safely, without breech of containment, since the working fluid of gaseous diffusion is gaseous UF/sub 6/. The condition of 1925 compressors is monitored by use of the 2500 point vibration analysis system. Since the failure mechanisms of the compressors are well known and documented, only one accelerometer per machine is needed for most machines. The system is completely automated and can generate spectra or broadband levels in either acceleration or velocity units. Levels are stored for historical review. The analyst can, via a custom telecommunications link, view and analyze data from all monitored points with an office PC. 4 figs.

  20. Smooth Bounce in Affine Quantization of Bianchi I

    E-Print Network [OSTI]

    Herve Bergeron; Andrea Dapor; Jean-Pierre Gazeau; Przemyslaw Malkiewicz

    2015-01-30T23:59:59.000Z

    We present the affine coherent state quantization of the Bianchi I model. As in our previous paper on quantum theory of Friedmann models, we employ a variable associated with a perfect fluid to play a role of clock. Then we deparameterize the model. A distinctive feature, absent in isotropic models, is an extra non-holonomic constraint, which survives the deparameterization and constrains the range of physical variables. The appearance of the constraint reflects the `amplification' of singularity due to anisotropy. The quantization smoothes the extra constraint and allows quantum contracting trajectories to be smoothly transformed into expanding ones. Making use of affine coherent state we develop a semiclassical description. Figures are included to illustrate our result.

  1. Smooth Bounce in Affine Quantization of Bianchi I

    E-Print Network [OSTI]

    Bergeron, Herve; Gazeau, Jean-Pierre; Malkiewicz, Przemyslaw

    2015-01-01T23:59:59.000Z

    We present the affine coherent state quantization of the Bianchi I model. As in our previous paper on quantum theory of Friedmann models, we employ a variable associated with a perfect fluid to play a role of clock. Then we deparameterize the model. A distinctive feature, absent in isotropic models, is an extra non-holonomic constraint, which survives the deparameterization and constrains the range of physical variables. The appearance of the constraint reflects the `amplification' of singularity due to anisotropy. The quantization smoothes the extra constraint and allows quantum contracting trajectories to be smoothly transformed into expanding ones. Making use of affine coherent state we develop a semiclassical description. Figures are included to illustrate our result.

  2. The determination of compressibility factors of gaseous propane-nitrogen mixtures 

    E-Print Network [OSTI]

    Hodges, Don

    1952-01-01T23:59:59.000Z

    of thc Beg;voc cf kBSTBACT The propane-nitrogen system has been investigated in the gaseous phase at a temperature of 300 F. and at pressures up to 4/0 atmospheres. Compressibility curves for three mixtures of this system have been determined. A... the pressure corresponding to the "n " expansion ? th? the partial pressure of nitrogen the partial pressure oi' propane the total pressure of a gaseous system the universal gas constant (0. 08206 liter-atmosphere/ gram mole - oK) the absolute...

  3. The determination of compressibility factors of gaseous propane-nitrogen mixtures 

    E-Print Network [OSTI]

    Dickson, Cecil Herman

    1955-01-01T23:59:59.000Z

    LIBRARY A A N O'iLLEOE OF 1EXAS THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEIN MIXTURES A Thesis Cecil Herman Dickson Submitted to the Graduate School of the Agricultural and Mechanical College of' Texas in partial... f'ulf'illment of the requirements for the de~ree of MASTER OF SCIENCE Ma]or GubjectI Chemistry May I&55 THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEN MIXTURES A Thesis Cecil Herman Dickson Approved as to style...

  4. The determination of compressibility factors of gaseous propane-nitrogen mixtures

    E-Print Network [OSTI]

    Dickson, Cecil Herman

    1955-01-01T23:59:59.000Z

    LIBRARY A A N O'iLLEOE OF 1EXAS THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEIN MIXTURES A Thesis Cecil Herman Dickson Submitted to the Graduate School of the Agricultural and Mechanical College of' Texas in partial... f'ulf'illment of the requirements for the de~ree of MASTER OF SCIENCE Ma]or GubjectI Chemistry May I&55 THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEN MIXTURES A Thesis Cecil Herman Dickson Approved as to style...

  5. The determination of compressibility factors of gaseous propane-nitrogen mixtures

    E-Print Network [OSTI]

    Hodges, Don

    1952-01-01T23:59:59.000Z

    of thc Beg;voc cf kBSTBACT The propane-nitrogen system has been investigated in the gaseous phase at a temperature of 300 F. and at pressures up to 4/0 atmospheres. Compressibility curves for three mixtures of this system have been determined. A... the pressure corresponding to the "n " expansion ? th? the partial pressure of nitrogen the partial pressure oi' propane the total pressure of a gaseous system the universal gas constant (0. 08206 liter-atmosphere/ gram mole - oK) the absolute...

  6. The value distribution of the Gauss map of improper affine spheres

    E-Print Network [OSTI]

    Kawakami, Yu

    2010-01-01T23:59:59.000Z

    We give the best possible upper bounds for the number of exceptional values and totally ramified value number of the Lagrangian Gauss map of complete improper affine maps in the affine three-space. Moreover, by applying the Fujimoto argument, we also obtain the sharp estimate for them of weakly complete improper affine maps. As an application, from the viewpoint of the value distribution of Lagrangian Gauss map, we provide a new proof of the classification of affine complete improper affine spheres. Furthermore, we get a ramification estimate for the ratio of canonical forms of weakly complete flat fronts in hyperbolic three-space.

  7. Nonlinear signal contamination effects for gaseous plume detection in hyperspectral imagery

    E-Print Network [OSTI]

    Theiler, James

    Nonlinear signal contamination effects for gaseous plume detection in hyperspectral imagery James-plume pixels are inadvertently included, then that background characterization will be contaminated. In broad in the scene are off- plume, so some contamination is inevitable. In general, the contaminated background

  8. Fracture response of externally flawed aluminum cylindrical shells under internal gaseous detonation loading

    E-Print Network [OSTI]

    Barr, Al

    , there is a lack of standard guidance in designing and testing pressure vessels and piping under explosive-mechanics driven design and safety criteria for pressure vessels under gaseous detonation load- ing. At this time pipelines, nuclear plant, and petrochemical piping. This study may also guide forensic analysis

  9. Impacts of a Nanosized Ceria Additive on Diesel Engine Emissions of Particulate and Gaseous Pollutants

    E-Print Network [OSTI]

    Garfunkel, Eric

    Impacts of a Nanosized Ceria Additive on Diesel Engine Emissions of Particulate and Gaseous incorporating nanosized ceria have been increasingly used in diesel engines as combustion promoters. However- cylinder, four-cycle diesel engine using fuel mixes containing nanoceria of varying concentrations

  10. Emission and Long-Range Transport of Gaseous Mercury from a

    E-Print Network [OSTI]

    Lee, Xuhui

    Emission and Long-Range Transport of Gaseous Mercury from a Large-Scale Canadian Boreal Forest FireQuebec.Thesemeasurementsindicated significant and highly correlated increases in Hg and CO during the plume event. The Hg:CO emissions ratio emissions and biomass burned to determine a mean area-based Hg emission flux density for boreal forest fires

  11. Changes in seal capacity of fractured claystone caprocks induced by dissolved and gaseous CO2 seepage

    E-Print Network [OSTI]

    Luquot, Linda

    reactivate pre-existing weaknesses inherited from reservoir production periods and create new fracturesChanges in seal capacity of fractured claystone caprocks induced by dissolved and gaseous CO2 underground storage when residual CO2 gas reaches the reservoir top due to buoyancy. Permeability changes

  12. Origin of gaseous hydrocarbons from Upper Cretaceous and Tertiary strata in the Piceance basin, western Colorado

    E-Print Network [OSTI]

    Katz, David Jonathan

    1997-01-01T23:59:59.000Z

    by the Douglas Creek arch. The Piceance basin contains commercial quantities of both liquid and gaseous hydrocarbons in Tertiary-age oil shales and in tight Cretaceous-age sandstone reservoirs (Rice, 1993). Iles and Williams Fork strata deeper in the basin...

  13. Superfund record of decision (EPA Region 4): Paducah Gaseous Diffusion Plant Site, Paducah, KY, March 1994

    SciTech Connect (OSTI)

    Not Available

    1994-07-01T23:59:59.000Z

    The decision document presents the selected interim action for the North-South Diversion Ditch (NSDD) at the Paducah Gaseous Diffusion Plant (PGDP) in Paducah, Kentucky. The primary objective of this interim remedial action is to initiate control of the source of continued contaminant releases into the NSDD and mitigate the spread of contamination from the NSDD.

  14. Extending the Photon Mapping Method for Realistic Rendering of Hot Gaseous Fluids

    E-Print Network [OSTI]

    Texas at Austin, University of

    sophistication and use of heated gas, fire, and explosion simulations in computer graphics applications gaseous fluids, ranging from simple smoke and gas to fire flames and explosions, abound in the real world, simulated flames and explosion were visualized using color maps, obtained from reference im- ages [1, 2, 3

  15. Numerical assessment of stability criteria from disturbance energies in gaseous combustion

    E-Print Network [OSTI]

    Nicoud, Franck

    Numerical assessment of stability criteria from disturbance energies in gaseous combustion A, which corresponds to a ducted, laminar premixed propane-air flame, is used to assess the different terms a contribution from the unsteady heat flux-pressure correlation, allows a better agreement with the numerical

  16. Elucidating the solid, liquid and gaseous products from batch pyrolysis of cotton-gin trash.

    E-Print Network [OSTI]

    Aquino, Froilan Ludana

    2009-05-15T23:59:59.000Z

    Cotton-gin trash (CGT) was pyrolyzed at different temperatures and reaction times using an externally-heated batch reactor. The average yields of output products (solid/char, liquid/bio-oil, and gaseous) were determined. The heating value (HV...

  17. Environmental Restoration Site-Specific Plan for the Portsmouth Gaseous Diffusion Plant, FY 93

    SciTech Connect (OSTI)

    Not Available

    1993-01-15T23:59:59.000Z

    The purpose of this Site-Specific Plan (SSP) is to describe past, present, and future activities undertaken to implement Environmental Restoration and Waste Management goals at the Portsmouth Gaseous Diffusion Plant (PORTS). The SSP is presented in sections emphasizing Environmental Restoration description of activities, resources, and milestones.

  18. DESCRIPTION PAR L'OPRATEUR DENSIT DU MOUVEMENT STATISTIQUE DE L'EXCITON LECTRONIQUE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    excitations electro- niques elementaires de l'agrégat. Le probleme est le suivant : dans 1'hypothese ou Fon sait (a I'aide d'un piege energetique, ou par interference d'excitations optiques ou par excitation

  19. TUDE CALORIMTRIQUE DU RAYONNEMENT DU DPT ACTIF DU THORIUM Par L. WINAND,

    E-Print Network [OSTI]

    Boyer, Edmond

    ÉTUDE CALORIMÉTRIQUE DU RAYONNEMENT DU DÉPÔT ACTIF DU THORIUM Par L. WINAND, Laboratoire Curie signalerons seulement que le circuit galvanométrique est composé (1) L. wINAVD, Étude de l'énergie dégagée par

  20. Sur les thories des dilectriques Par Tcheslas BIALOBJESKI

    E-Print Network [OSTI]

    Boyer, Edmond

    pôle de la batterie (l'autre pôle étant au sol), il se produit par induction une charge Fig. 1 décharge du condensateur en réunissant les armatures entre elles, les charges inductives se neutralisent en- sateur plan. Faisons communiquer une armature de ce condensateur avec une batterie de petits accumula

  1. Universite des Sciences et Technologies de Lille Travaux presentes par

    E-Print Network [OSTI]

    Madeleine, Jean-Baptiste

    Universit´e des Sciences et Technologies de Lille Travaux pr´esent´es par M. Olivier Boucher en vue de l'obtention de L'HABILITATION A DIRIGER DES RECHERCHES EN SCIENCES PHYSIQUES Effets radiatifs-Jacques Morcrette Rapporteur Didier Tanr´e Examinateur U.F.R de Physique Fondamentale Laboratoire d'Optique Atmosph

  2. INTERPRTATION GOMTRIQUE DES INTGRALES DE FRESNEL ; Par M. N. OUMOFF.

    E-Print Network [OSTI]

    Boyer, Edmond

    281 INTERPRÉTATION GÉOMÉTRIQUE DES INTÉGRALES DE FRESNEL ; Par M. N. OUMOFF. I. - Pour représenter ', a pour valeur : Elle représente toujours l'intégrale A de Fresnel si l'on compte les boucles de -1 3) représente l'intégrale B de Fresnel sous des conditions analogues. Les maximum de B sont

  3. Contrle du comportement ingestif et mrycique par les neuropeptides

    E-Print Network [OSTI]

    Boyer, Edmond

    Contrôle du comportement ingestif et mérycique par les neuropeptides L. BUÉNO, P. RIVIÈRE Station. Neuropeptidergic control of feeding behavior and rumination in sheep. In sheep as in other species. Introduction. L'hypothèse de l'existence d'une régulation centrale neuropeptidergique de l'appétit est récente

  4. Generalized discrete orbit function transforms of affine Weyl groups

    E-Print Network [OSTI]

    Tomasz Czy?ycki; Ji?í Hrivnák

    2014-11-14T23:59:59.000Z

    The affine Weyl groups with their corresponding four types of orbit functions are considered. Two independent admissible shifts, which preserve the symmetries of the weight and the dual weight lattices, are classified. Finite subsets of the shifted weight and the shifted dual weight lattices, which serve as a sampling grid and a set of labels of the orbit functions, respectively, are introduced. The complete sets of discretely orthogonal orbit functions over the sampling grids are found and the corresponding discrete Fourier transforms are formulated. The eight standard one-dimensional discrete cosine and sine transforms form special cases of the presented transforms.

  5. On near-rings associated with generalized affine planes

    E-Print Network [OSTI]

    Armentrout, Nancy Jane

    1971-01-01T23:59:59.000Z

    ON NEAR-RINGS ASSOCIATED WITH GENERALIZED AFFINE PLANES A Thesis by NANCY JANE ARMENTROUT Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1971... Ma)or Subject: Mathematics ON NEAR-RINGS ASSOCIATED WITH GENERALIZED AI'FINE PLANES A Thesis NANCY JANE ARMENTROUT Approved as to style and content by: A, n. ;s-, . (Chairma of Committee) c ~ g~~+ (Head of Department) (Member) (Member) Mem...

  6. projet conjoint parrain par la Fondation Shell et Shell Gabon, des chercheurs de l'Institution

    E-Print Network [OSTI]

    Baker, Robert J.

    projet conjoint parrainé par la Fondation Shell et Shell Gabon, des chercheurs de l, le Cameroun et la Guinée-Équatoriale. Le pays est baigné par un climat tropical humide avec une'orientation par écholocation des Microchiroptères représente une adaptation évolutive unique à la vie nocturne

  7. SUR UN SILICATE DE CADMIUM LUMINESCENT Par A. LEVIALDI et V. LUZZATI.

    E-Print Network [OSTI]

    Boyer, Edmond

    SUR UN SILICATE DE CADMIUM LUMINESCENT Par A. LEVIALDI et V. LUZZATI. Sommaire. - �tude de quelques propriétés d'un silicate de cadmium (1) luminescent. Leur interpré- tation par la théorie des trappes de silicate de cadmium par des radiations ultra- violettes de longueur d'onde voisine de ), = 2537 A

  8. LA DIFFUSION DE LA LUMIRE PAR LE MTHANE ET SES HOMOLOGUES GAZEUX par MM. J. CABANNES et J. GAUZIT,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    hydrocarbures saturés gazeux de la série grasse n'est pas complètement polarisée. Le facteur de dépolarisation molécules voisines. Dans le travail actuel, nous avons choisi comme sujets d'expérience les hydrocarbures;183 2. Préparation des hydrocarbures. - Nous avons préparé les terrnes de la série par le procédé

  9. Robust activation method for negative electron affinity photocathodes

    DOE Patents [OSTI]

    Mulhollan, Gregory A. (Dripping Springs, TX); Bierman, John C. (Austin, TX)

    2011-09-13T23:59:59.000Z

    A method by which photocathodes(201), single crystal, amorphous, or otherwise ordered, can be surface modified to a robust state of lowered and in best cases negative, electron affinity has been discovered. Conventional methods employ the use of Cs(203) and an oxidizing agent(207), typically carried by diatomic oxygen or by more complex molecules, for example nitrogen trifluoride, to achieve a lowered electron affinity(404). In the improved activation method, a second alkali, other than Cs(205), is introduced onto the surface during the activation process, either by co-deposition, yo-yo, or sporadic or intermittent application. Best effect for GaAs photocathodes has been found through the use of Li(402) as the second alkali, though nearly the same effect can be found by employing Na(406). Suitable photocathodes are those which are grown, cut from boules, implanted, rolled, deposited or otherwise fabricated in a fashion and shape desired for test or manufacture independently supported or atop a support structure or within a framework or otherwise affixed or suspended in the place and position required for use.

  10. Mechanics of Systems of Affine Bodies. Geometric Foundations and Applications in Dynamics of Structured Media

    E-Print Network [OSTI]

    J. J. S\\lawianowski; V. Kovalchuk; A. Martens; B. Go\\lubowska; E. E. Ro?ko

    2010-11-24T23:59:59.000Z

    In the present paper we investigate the mechanics of systems of affinely-rigid bodies, i.e., bodies rigid in the sense of affine geometry. Certain physical applications are possible in modelling of molecular crystals, granular media, and other physical objects. Particularly interesting are dynamical models invariant under the group underlying geometry of degrees of freedom. In contrary to the single body case there exist nontrivial potentials invariant under this group (left and right acting). The concept of relative (mutual) deformation tensors of pairs of affine bodies is discussed. Scalar invariants built of such tensors are constructed. There is an essential novelty in comparison to deformation scalars of single affine bodies, i.e., there exist affinely-invariant scalars of mutual deformations. Hence, the hierarchy of interaction models according to their invariance group, from Euclidean to affine ones, can be considered.

  11. Second order analysis of state-constrained control-affine problems

    E-Print Network [OSTI]

    M. Soledad Aronna

    2014-11-07T23:59:59.000Z

    Nov 7, 2014 ... Abstract: In this article we establish new second order necessary and sufficient optimality conditions for a class of control-affine problems with a ...

  12. On the existence of affine Landau-Ginzburg phases in gauged linear sigma models

    E-Print Network [OSTI]

    Patrick Clarke; Josh Guffin

    2010-09-04T23:59:59.000Z

    We prove a simple criterion for the existence of an affine Landau-Ginzburg point in the K\\"ahler moduli space of a gauged linear sigma model.

  13. A Possible Anisotropy in Blackbody Radiation Viewed through Non-uniform Gaseous Matter

    E-Print Network [OSTI]

    Ray-Dastidar, T K

    1999-01-01T23:59:59.000Z

    A non-local gauge symmetry of a complex scalar field, which can be trivially extended to spinor fields, was demonstrated in a recent paper (Mod.Phys.Lett. A13, 1265 (1998) ; hep-th/9902020). The corresponding covariant Lagrangian density yielded a new, non-local Quantum Electrodynamics. In the present paper it is shown that as a consequence of this new QED, a blackbody radiation viewed through gaseous matter appears to show a slight deviation from the Planck formula, and we propose an experimental test to check this effect. We also show that a non-uniformity in this gaseous matter distribution leads to an (apparent) spatial anisotropy in the blackbody radiation.

  14. Natural phenomena hazards evaluation of equipment and piping of Gaseous Diffusion Plant Uranium Enrichment Facility

    SciTech Connect (OSTI)

    Singhal, M.K.; Kincaid, J.H.; Hammond, C.R.; Stockdale, B.I.; Walls, J.C. [Oak Ridge National Lab., TN (United States). Technical Programs and Services; Brock, W.R.; Denton, D.R. [Lockheed Martin Energy Systems, Inc., Oak Ridge, TN (United States)

    1995-12-31T23:59:59.000Z

    In support of the Gaseous Diffusion Plant Safety Analysis Report Upgrade program (GDP SARUP), a natural phenomena hazards evaluation was performed for the main process equipment and piping in the uranium enrichment buildings at Paducah and Portsmouth gaseous diffusion plants. In order to reduce the cost of rigorous analyses, the evaluation methodology utilized a graded approach based on an experience data base collected by SQUG/EPRI that contains information on the performance of industrial equipment and piping during past earthquakes. This method consisted of a screening walkthrough of the facility in combination with the use of engineering judgment and simple calculations. By using these screenings combined with evaluations that contain decreasing conservatism, reductions in the time and cost of the analyses were significant. A team of experienced seismic engineers who were trained in the use of the DOE SQUG/EPRI Walkdown Screening Material was essential to the success of this natural phenomena hazards evaluation.

  15. Process and system for removing sulfur from sulfur-containing gaseous streams

    DOE Patents [OSTI]

    Basu, Arunabha (Aurora, IL); Meyer, Howard S. (Hoffman Estates, IL); Lynn, Scott (Pleasant Hill, CA); Leppin, Dennis (Chicago, IL); Wangerow, James R. (Medinah, IL)

    2012-08-14T23:59:59.000Z

    A multi-stage UCSRP process and system for removal of sulfur from a gaseous stream in which the gaseous stream, which contains a first amount of H.sub.2S, is provided to a first stage UCSRP reactor vessel operating in an excess SO.sub.2 mode at a first amount of SO.sub.2, producing an effluent gas having a reduced amount of SO.sub.2, and in which the effluent gas is provided to a second stage UCSRP reactor vessel operating in an excess H.sub.2S mode, producing a product gas having an amount of H.sub.2S less than said first amount of H.sub.2S.

  16. Supplementary Information for Depletion of gaseous polycyclic aromatic hydrocarbons by a forest

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    , Toronto, Ontario, Canada, M3H 5T4 *now at: Worsfold Water Quality Centre, Trent University, Peterborough of gaseous PAHs S5­S6 Table S4 Concentrations of particulate PAHs S7­S8 Fig. S3 Back trajectories and wind-rose diagrams S9­S11 Fig. S4 Vertical profiles of PAHs S12­S13 Table S5 Particle-bound percentages of PAHs S14­S

  17. Environmental Restoration Site-Specific Plan for the Paducah Gaseous Diffusion Plant, FY 93

    SciTech Connect (OSTI)

    Not Available

    1993-01-15T23:59:59.000Z

    This report provides an overview of the major Environmental Restoration (ER) concerns at Paducah Gaseous Diffusion Plant (PGDP). The identified solid waste management units at PGDP are listed. In the Department of Energy (DOE) Five Year Plan development process, one or more waste management units are addressed in a series of activity data sheets (ADSs) which identify planned scope, schedule, and cost objectives that are representative of the current state of planned technical development for individual or multiple sites.

  18. Introduction to the nuclear criticality safety evaluation of facility X-705, Portsmouth Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Sheaffer, M.K.; Keeton, S.C.

    1993-08-16T23:59:59.000Z

    This report is the first in a series of documents that will evaluate nuclear criticality safety in the Decontamination and Recovery Facility, X-705, Portsmouth Gaseous Diffusion Plant. It provides an overview of the facility, categorizes its functions for future analysis, reviews existing NCS documentation, and explains the follow-on effort planned for X-705. A detailed breakdown of systems, subsystems, and operational areas is presented and cross-referenced to existing NCS documentation.

  19. Nuclear criticality safety evaluation of Spray Booth Operations in X-705, Portsmouth Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Sheaffer, M.K.; Keeton, S.C.

    1993-09-20T23:59:59.000Z

    This report evaluates nuclear criticality safety for Spray Booth Operations in the Decontamination and Recovery Facility, X-705, at the Portsmouth Gaseous Diffusion Plant. A general description of current procedures and related hardware/equipment is presented. Control parameters relevant to nuclear criticality safety are explained, and a consolidated listing of administrative controls and safety systems is developed. Based on compliance with DOE Orders and MMES practices, the overall operation is evaluated, and recommendations for enhanced safety are suggested.

  20. The development of a sensitive method to study volatile organic compounds in gaseous emissions of lung cancer cell lines 

    E-Print Network [OSTI]

    Maroly, Anupam

    2005-08-29T23:59:59.000Z

    The ultimate objective of this research was to develop a low cost, reliable system that would lead to early detection of lung cancer. Tests involved the quantitation of gaseous metabolic emissions from immortalized lung ...

  1. EA-0767: Construction and Experiment of an Industrial Solid Waste Landfill at Portsmouth Gaseous Diffusion Plant, Piketon, Ohio

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts of a proposal to construct and operate a solid waste landfill within the boundary at the U.S. Department of Energy's Portsmouth Gaseous Diffusion plant...

  2. Laser acceleration of protons using multi-ion plasma gaseous targets

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Liu, Tung-Chang; Shao, Xi; Liu, Chuan-Sheng; Eliasson, Bengt; Hill, W T; Wang, Jyhpyng; Chen, Shih-Hung

    2015-02-01T23:59:59.000Z

    We present a theoretical and numerical study of a novel acceleration scheme by applying a combination of laser radiation pressure and shielded Coulomb repulsion in laser acceleration of protons in multi-species gaseous targets. By using a circularly polarized CO2 laser pulse with a wavelength of 10 ?m—much greater than that of a Ti: Sapphire laser—the critical density is significantly reduced, and a high-pressure gaseous target can be used to achieve an overdense plasma. This gives us a larger degree of freedom in selecting the target compounds or mixtures, as well as their density and thickness profiles. By impinging such amore »laser beam on a carbon–hydrogen target, the gaseous target is first compressed and accelerated by radiation pressure until the electron layer disrupts, after which the protons are further accelerated by the electron-shielded carbon ion layer. An 80 MeV quasi-monoenergetic proton beam can be generated using a half-sine shaped laser beam with a peak power of 70 TW and a pulse duration of 150 wave periods.« less

  3. Method and apparatus for the selective separation of gaseous coal gasification products by pressure swing adsorption

    DOE Patents [OSTI]

    Ghate, Madhav R. (Morgantown, WV); Yang, Ralph T. (Williamsville, NY)

    1987-01-01T23:59:59.000Z

    Bulk separation of the gaseous components of multi-component gases provided by the gasification of coal including hydrogen, carbon monoxide, methane, and acid gases (carbon dioxide plus hydrogen sulfide) are selectively adsorbed by a pressure swing adsorption technique using activated carbon, zeolite or a combination thereof as the adsorbent. By charging a column containing the adsorbent with a gas mixture and pressurizing the column to a pressure sufficient to cause the adsorption of the gases and then reducing the partial pressure of the contents of the column, the gases are selectively and sequentially desorbed. Hydrogen, the least absorbable gas of the gaseous mixture, is the first gas to be desorbed and is removed from the column in a co-current direction followed by the carbon monoxide, hydrogen and methane. With the pressure in the column reduced to about atmospheric pressure the column is evacuated in a countercurrent direction to remove the acid gases from the column. The present invention is particularly advantageous as a producer of high parity hydrogen from gaseous products of coal gasification and as an acid gas scrubber.

  4. Method and apparatus for the selective separation of gaseous coal gasification products by pressure swing adsorption

    DOE Patents [OSTI]

    Ghate, M.R.; Yang, R.T.

    1985-10-03T23:59:59.000Z

    Bulk separation of the gaseous components of multi-component gases provided by the gasification of coal including hydrogen, carbon monoxide, methane, and acid gases (carbon dioxide plus hydrogen sulfide) are selectively adsorbed by a pressure swing adsorption technique using activated carbon zeolite or a combination thereof as the adsorbent. By charging a column containing the adsorbent with a gas mixture and pressurizing the column to a pressure sufficient to cause the adsorption of the gases and then reducing the partial pressure of the contents of the column, the gases are selectively and sequentially desorbed. Hydrogen, the least absorbable gas of the gaseous mixture, is the first gas to be desorbed and is removed from the column in a co-current direction followed by the carbon monoxide, hydrogen and methane. With the pressure in the column reduced to about atmospheric pressure the column is evacuated in a countercurrent direction to remove the acid gases from the column. The present invention is particularly advantageous as a producer of high purity hydrogen from gaseous products of coal gasification and as an acid gas scrubber. 2 figs., 2 tabs.

  5. United States Department of Energy Paducah Gaseous Diffusion Plant. Environmental monitoring report, calendar year 1984

    SciTech Connect (OSTI)

    Not Available

    1985-07-01T23:59:59.000Z

    Air, water, soil, sediments, grass, and groundwater in the vicinity of the Paducah Gaseous Diffusion Plant were continuously or periodically sampled during 1984. Analyses for materials known to be in plant effluents were made to provide effluent control information and to determine compliance with applicable environmental standards. Low sulfur coal is burned in the steam plant to meet Kentucky emission limits for sulfur dioxide. Air analyses for radioactivity indicated concentrations at each off-site sampling station averaged less than 1% of the DOE Radioactivity Concentration Guide (RCG). Offsite analyses for fluorides in grass met the Kentucky Air Quality Requirements. All onsite and offsite airborne fluoride samples met the Kentucky one-week and one-month standards for gaseous HF. Soil samples were analyzed for uranium and showed no significant deviation from normal background concentrations. There was no detectable change in chemical, physical, or radioactive characteristics of the Ohio River attributable to Paducah Gaseous Diffusion Plant operations. The results of water sample analyses of the Ohio River show the chromium and fluoride concentrations to be in compliance with the requirements of the applicable Kentucky regulations. 7 figs., 26 tabs.

  6. Convex bodies and algebraic equations on affine varieties

    E-Print Network [OSTI]

    Kaveh, Kiumars

    2008-01-01T23:59:59.000Z

    Given an affine variety X and a finite dimensional vector space of regular functions L on X, we associate a convex body to (X, L) such that its volume is responsible for the number of solutions of a generic system of functions from L. This is a far reaching generalization of usual theory of Newton polytopes (which is concerned with toric varieties). As applications we give new, simple and transparent proofs of some well-known theorems in both algebraic geometry (e.g. Hodge Index Theorem) and convex geometry (e.g. Alexandrov-Fenchel inequality). Our main tools are classical Hilbert theory on degree of subvarieties of a projective space (in algebraic geometry) and Brunn-Minkowski inequality (in convex geometric).

  7. Automorphisms of the affine SU(3) fusion rules

    E-Print Network [OSTI]

    Philippe Ruelle

    1993-01-29T23:59:59.000Z

    We classify the automorphisms of the (chiral) level-k affine SU(3) fusion rules, for any value of k, by looking for all permutations that commute with the modular matrices S and T. This can be done by using the arithmetic of the cyclotomic extensions where the problem is naturally posed. When k is divisible by 3, the automorphism group (Z_2) is generated by the charge conjugation C. If k is not divisible by 3, the automorphism group (Z_2 x Z_2) is generated by C and the Altsch\\"uler--Lacki--Zaugg automorphism. Although the combinatorial analysis can become more involved, the techniques used here for SU(3) can be applied to other algebras.

  8. PALIERS POUR ROTORS TOURNANT A GRANDE VITESSE Par G. GOBERT,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    l'air comprimé comme gaz. Le principe consiste à sépa- rer, par un film gazeux, un plan mobile d atmosphérique aux abords du gicleur, due soit à un écoulement où la vitesse du gaz atteint la célérité locale du turbine (poids = 27 g). ~ b = butée : 4 gicleurs 0 1 mm sur 0 20 mm. 4 gicleurs 0 1 mm sur 0 34 mm. Modèle

  9. Design Studies and Commissioning Plans for PARS Experimental Program

    E-Print Network [OSTI]

    Mete, O; Xia, G; Dover, M; Wigram, M; Wright, J; Zhang, J; Smith, J

    2015-01-01T23:59:59.000Z

    PARS (Plasma Acceleration Research Station) is an electron beam driven plasma wakefield acceleration test stand proposed for VELA/CLARA facility in Daresbury Laboratory. In order to optimise various operational configurations, 2D numerical studies were performed by using VSIM for a range of parameters such as bunch length, radius, plasma density and positioning of the bunches with respect to each other for the two-beam acceleration scheme. In this paper, some of these numerical studies and considered measurement methods are presented.

  10. Optimisation combinatoire Modelisation MIP Sujet 1 : Modelisation par la programmation

    E-Print Network [OSTI]

    Miller, Andrew J.

    discr`ete (par opposition `a continue) Probl`eme d' optimisation : min f (x) s. `a x X o`u l'ensemble X Domaines d'application Industriel Automobile: gestion de la diversit´e Production ´energ´etique , x2 0 x1 , x2 ZZ Classification: Application industrielle. Probl`eme Lin´eaire (facile) en nombres

  11. Regression inverse par tranches sur flux de donnees

    E-Print Network [OSTI]

    Boyer, Edmond

    'un mod`ele semi-param´etrique sous-jacent incluant une direction EDR (Effective Dimension Reduction'il existe une d´erive de la direction EDR ou bien des blocs de donn´ees aberrantes, et nous illustrons notre´eaire engendr´e par : ici dans le cadre d'un mod`ele `a un seul indice, nous parlons de direction EDR

  12. Gas separation process using membranes with permeate sweep to remove CO.sub.2 from gaseous fuel combustion exhaust

    DOE Patents [OSTI]

    Wijmans Johannes G. (Menlo Park, CA); Merkel, Timothy C. (Menlo Park, CA); Baker, Richard W. (Palo Alto, CA)

    2012-05-15T23:59:59.000Z

    A gas separation process for treating exhaust gases from the combustion of gaseous fuels, and gaseous fuel combustion processes including such gas separation. The invention involves routing a first portion of the exhaust stream to a carbon dioxide capture step, while simultaneously flowing a second portion of the exhaust gas stream across the feed side of a membrane, flowing a sweep gas stream, usually air, across the permeate side, then passing the permeate/sweep gas back to the combustor.

  13. The development of a sensitive method to study volatile organic compounds in gaseous emissions of lung cancer cell lines

    E-Print Network [OSTI]

    Maroly, Anupam

    2005-08-29T23:59:59.000Z

    THE DEVELOPMENT OF A SENSITIVE METHOD TO STUDY VOLATILE ORGANIC COMPOUNDS IN GASEOUS EMISSIONS OF LUNG CANCER CELL LINES A Thesis by ANUPAM MAROLY Submitted to the Office of Graduate Studies of Texas A&M University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2005 Major Subject: Biomedical Engineering THE DEVELOPMENT OF A SENSITIVE METHOD TO STUDY VOLATILE ORGANIC COMPOUNDS IN GASEOUS EMISSIONS OF LUNG CANCER CELL...

  14. STAR FORMATION IN THE EXTENDED GASEOUS DISK OF THE ISOLATED GALAXY CIG 96

    SciTech Connect (OSTI)

    Espada, D.; Sabater, J.; Verdes-Montenegro, L.; Sulentic, J. [Instituto de Astrofisica de AndalucIa, CSIC, Apdo. 3004, 18080 Granada (Spain); Munoz-Mateos, J. C.; Gil de Paz, A. [Departamento de Astrofisica y CC. de la Atmosfera, Universidad Complutense de Madrid, Avda. de la Complutense, s/n, E-28040 Madrid (Spain); Boissier, S.; Athanassoula, E.; Bosma, A. [Laboratoire d'Astrophysique de Marseille, OAMP, Universite Aix-Marseille and CNRS UMR 6110, 38 rue Frederic Joliot-Curie, 13388 Marseille Cedex 13 (France); Verley, S. [Dept. de Fisica Teorica y del Cosmos, Universidad de Granada, Granada (Spain); Leon, S. [Joint ALMA Observatory/ESO, Av. Alonso de Cordova 3107, Vitacura, Santiago (Chile); Yun, M., E-mail: daniel.espada@nao.ac.jp, E-mail: despada@cfa.harvard.edu [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States)

    2011-07-20T23:59:59.000Z

    We study the Kennicutt-Schmidt star formation law and efficiency in the gaseous disk of the isolated galaxy CIG 96 (NGC 864), with special emphasis on its unusually large atomic gas (H I) disk (r{sub Hmathsci}/r{sub 25} = 3.5, r{sub 25} = 1.'85). We present deep Galaxy Evolution Explorer near- and far-UV observations, used as a recent star formation tracer, and we compare them with new, high-resolution (16''or 1.6 kpc) Very Large Array H I observations. The UV and H I maps show good spatial correlation outside the inner 1', where the H I phase dominates over H{sub 2}. Star-forming regions in the extended gaseous disk are mainly located along the enhanced H I emission within two (relatively) symmetric, giant gaseous spiral arm-like features, which emulate an H I pseudo-ring at r {approx_equal} 3'. Inside this structure, two smaller gaseous spiral arms extend from the northeast and southwest of the optical disk and connect to the previously mentioned H I pseudo-ring. Interestingly, we find that the (atomic) Kennicutt-Schmidt power-law index systematically decreases with radius, from N {approx_equal} 3.0 {+-} 0.3 in the inner disk (0.'8-1.'7) to N = 1.6 {+-} 0.5 in the outskirts of the gaseous disk (3.'3-4.'2). Although the star formation efficiency (SFE), the star formation rate per unit of gas, decreases with radius where the H I component dominates as is common in galaxies, we find that there is a break of the correlation at r = 1.5r{sub 25}. At radii 1.5r{sub 25} < r < 3.5r{sub 25}, mostly within the H I pseudo-ring structure, regions exist whose SFE remains nearly constant, SFE {approx_equal} 10{sup -11} yr{sup -1}. We discuss possible mechanisms that might be triggering the star formation in the outskirts of this galaxy, and we suggest that the constant SFE for such large radii (r > 2r{sub 25}) and at such low surface densities might be a common characteristic in extended UV disk galaxies.

  15. MICROSTRUCTURE AND MECHANICAL PROPERTY PERFORMANCE OF COMMERCIAL GRADE API PIPELINE STEELS IN HIGH PRESSURE GASEOUS HYDROGEN

    SciTech Connect (OSTI)

    Stalheim, Mr. Douglas [DGS Metallurgical Solutions Inc; Boggess, Todd [Secat; San Marchi, Chris [Sandia National Laboratories (SNL); Jansto, Steven [Reference Metals Company; Somerday, Dr. B [Sandia National Laboratories (SNL); Muralidharan, Govindarajan [ORNL; Sofronis, Prof. Petros [University of Illinois

    2010-01-01T23:59:59.000Z

    The continued growth of the world s developing countries has placed an ever increasing demand on traditional fossil fuel energy sources. This development has lead to increasing research and development of alternative energy sources. Hydrogen gas is one of the potential alternative energy sources under development. Currently the most economical method of transporting large quantities of hydrogen gas is through steel pipelines. It is well known that hydrogen embrittlement has the potential to degrade steel s mechanical properties when hydrogen migrates into the steel matrix. Consequently, the current pipeline infrastructure used in hydrogen transport is typically operated in a conservative fashion. This operational practice is not conducive to economical movement of significant volumes of hydrogen gas as an alternative to fossil fuels. The degradation of the mechanical properties of steels in hydrogen service is known to depend on the microstructure of the steel. Understanding the levels of mechanical property degradation of a given microstructure when exposed to hydrogen gas under pressure can be used to evaluate the suitability of the existing pipeline infrastructure for hydrogen service and guide alloy and microstructure design for new hydrogen pipeline infrastructure. To this end, the 2 Copyright 2010 by ASME microstructures of relevant steels and their mechanical properties in relevant gaseous hydrogen environments must be fully characterized to establish suitability for transporting hydrogen. A project to evaluate four commercially available pipeline steels alloy/microstructure performance in the presences of gaseous hydrogen has been funded by the US Department of Energy along with the private sector. The microstructures of four pipeline steels were characterized and then tensile testing was conducted in gaseous hydrogen and helium at pressures of 800, 1600 and 3000 psi. Based on measurements of reduction of area, two of the four steels that performed the best across the pressure range were selected for evaluation of fracture and fatigue performance in gaseous hydrogen at 800 and 3000 psi. This paper will describe the work performed on four commercially available pipeline steels in the presence of gaseous hydrogen at pressures relevant for transport in pipelines. Microstructures and mechanical property performances will be compared. In addition, recommendations for future work related to gaining a better understanding of steel pipeline performance in hydrogen service will be discussed.

  16. Design considerations for instrumentation to monitor the enrichment of gaseous UF{sub 6}

    SciTech Connect (OSTI)

    Close, D.A.

    1999-07-01T23:59:59.000Z

    The measurement of the enrichment of gaseous UF{sub 6} presents unique measurement problems. The well-known uranium enrichment meter is not applicable. For solid samples of uranium, including metal, and oxide and fluoride compounds, the infinite thickness is {approximately}1 cm. Gaseous UF{sub 6}, at a pressure of tens of Torr, has an infinite thickness on the order of 350 m. This is a physically and operationally unrealistic situation for an operating facility. Pipe dimensions and composition also strongly influence the applicable measurement technique. Fundamentally, the definition of enrichment is the ratio of {sup 235}U to total uranium. The amount of {sup 235}U is determined by measuring the intensity of the 185.7-keV gamma ray from the decay of {sup 235}U. There are two methods that have been implemented to determine the amount of total uranium in the gas: X-ray fluorescence (XRF) and gamma-ray transmission. The technique used to measure the amount of total uranium is dependent on the pressure of the gas in the header pipe. The transmission measurement is applicable for higher pressures, generally pressures {lt}40 Torr. The XRF measurement can be used for pressures greater than a few Torr. An XRF measurement at pressures lower than a few Torr becomes very difficult. Two other constraints strongly influence the implementation of the measurement technique--pipe diameter and material composition. These two techniques have been implemented. The XRF technique is an approved measurement by the International Atomic Energy Agency (IAEA) for inspections at gaseous centrifuge facilities. The XRF technique has also been implemented at the Portsmouth Gaseous Diffusion Plant for the IAEA verification experiment during the period December 1997 to October 1998 to verify the downblending of US highly enriched uranium (HEU) to low-enriched uranium (LEU). The transmission technique was originally developed to verify the downblending of Russian HEU to LEU. This instrument was demonstrated at the Paducah Gaseous Diffusion Plant from April 1998 to July 1998 and installed at the Urals Electrochemical Integrated Plant, Novouralsk, Russia, during January 1999.

  17. Optimal Control Using an Algebraic Method for Control-Affine Nonlinear Systems

    E-Print Network [OSTI]

    Won, Chang-Hee

    of researchers have worked on the nonlinear optimal control problem, but they usually assume a linear systemOptimal Control Using an Algebraic Method for Control-Affine Nonlinear Systems Chang-Hee Won, 2007 Abstract A deterministic optimal control problem is solved for a control-affine nonlin- ear system

  18. Optimal control of constrained, piecewise affine systems with bounded disturbances1

    E-Print Network [OSTI]

    Cambridge, University of

    on the robust optimal control of linear systems to the class of piecewise affine systems. The ex- tensionOptimal control of constrained, piecewise affine systems with bounded disturbances1 Eric C stabilising. Key words: piecewise linear, constraints, optimal control, receding horizon control, model

  19. Computing Interprocedurally Valid Relations in Affine Programs Markus M ullerOlm

    E-Print Network [OSTI]

    Müller-Olm, Markus

    Computing Interprocedurally Valid Relations in Affine Programs Markus MË? uller­Olm Universit := x 1 3x 2 +7 are treated exactly [7]. In generalization of these, MË? uller­Olm and Seidl considerË? uller­Olm et al. observe that checking a given affine relation for validity at a program point can

  20. Computing Interprocedurally Valid Relations in Affine Programs Markus Muller-Olm

    E-Print Network [OSTI]

    Müller-Olm, Markus

    Computing Interprocedurally Valid Relations in Affine Programs Markus M¨uller-Olm Universit such as ¡¤¦¡ !¡"$#&% are treated exactly [7]. In generalization of these, M¨uller-Olm and Seidl consider polynomial pro- grams on the variable ¡3¢ from the left- hand side. In [13], M¨uller-Olm et al. observe that checking a given affine

  1. K-means Hashing: an Affinity-Preserving Quantization Method for Learning Binary Compact Codes

    E-Print Network [OSTI]

    Bernstein, Phil

    K-means Hashing: an Affinity-Preserving Quantization Method for Learning Binary Compact Codes. In this paper, we present a hashing method adopting the k-means quantization. We propose a novel Affinity-Preserving K-means algorithm which simultane- ously performs k-means clustering and learns the binary indices

  2. Oxygen affinity and amino acid sequence of myoglobins from endothermic and ectothermic fish

    E-Print Network [OSTI]

    Block, Barbara A.

    Oxygen affinity and amino acid sequence of myoglobins from endothermic and ectothermic fish DAVID J, David J., Joseph Bonaventura, Jonathan B. Wittenberg, and Barbara A. Block. Oxygen affinity and amino the partial pressure of oxygen at which Mb is half saturated (P50) of the molecule. We test the hypothesis

  3. A Rare Earth-DOTA-Binding Antibody: Probe Properties and Binding Affinity across the Lanthanide Series

    E-Print Network [OSTI]

    Fisher, Andrew J.

    1) binds transition metals and rare earths with extreme stability under physiological conditionsA Rare Earth-DOTA-Binding Antibody: Probe Properties and Binding Affinity across the Lanthanide affinity and exquisite specificity.1 An antibody that binds rare earth complexes selectively could be used

  4. The Quantum Affine Origin of the AdS/CFT Secret Symmetry

    E-Print Network [OSTI]

    Marius de Leeuw; Vidas Regelskis; Alessandro Torrielli

    2011-12-21T23:59:59.000Z

    We find a new quantum affine symmetry of the S-matrix of the one-dimensional Hubbard chain. We show that this symmetry originates from the quantum affine superalgebra U_q(gl(2|2)), and in the rational limit exactly reproduces the secret symmetry of the AdS/CFT worldsheet S-matrix.

  5. Improved -Elimination-Based Affinity Purification Strategy for Enrichment of Phosphopeptides

    E-Print Network [OSTI]

    Chait, Brian T.

    Improved -Elimination-Based Affinity Purification Strategy for Enrichment of Phosphopeptides Derek followed by addition of an affinity tag has recently been pursued as a strategy for enriching to be effective at enriching phosphopeptides from fairly complex peptide mixtures. The strategy was applied

  6. Analyse Statistique de la Pollution par les PM10 en Haute-Normandie

    E-Print Network [OSTI]

    Boyer, Edmond

    Analyse Statistique de la Pollution par les PM10 en Haute-Normandie Fran¸cois-Xavier Jolloisa travail porte sur l'analyse de la pollution par les particules PM10 en r´egion Haute- Normandie entre 2004´eaires et les m´elanges de mod`eles lin´eaires, on mod´elise les effets des vari- ables sur la pollution par

  7. Investigation of gas-phase decontamination of internally radioactively contaminated gaseous diffusion process equipment and piping

    SciTech Connect (OSTI)

    Bundy, R.D.; Munday, E.B.

    1991-01-01T23:59:59.000Z

    Construction of the gaseous diffusion plants (GDPs) was begun during World War 2 to produce enriched uranium for defense purposes. These plants, which utilized UF{sub 6} gas, were used primarily for this purpose through 1964. From 1959 through 1968, production shifted primarily to uranium enrichment to supply the nuclear power industry. Additional UF{sub 6}-handling facilities were built in feed and fuel-processing plants associated with the uranium enrichment process. Two of the five process buildings at Oak ridge were shut down in 1964. Uranium enrichment activities at Oak Ridge were discontinued altogether in 1985. In 1987, the Department of Energy (DOE) decided to proceed with a permanent shutdown of the Oak Ridge Gaseous Diffusion Plant (ORGDP). DOE intends to begin decommissioning and decontamination (D D) of ORGDP early in the next century. The remaining two GDPs are expected to be shut down during the next 10 to 40 years and will also require D D, as will the other UF{sub 6}-handling facilities. This paper presents an investigation of gas- phase decontamination of internally radioactively contaminated gaseous diffusion process equipment and piping using powerful fluorinating reagents that convert nonvolatile uranium compounds to volatile UF{sub 6}. These reagents include ClF{sub 3}, F{sub 2}, and other compounds. The scope of D D at the GDPs, previous work of gas-phase decontamination, four concepts for using gas-phase decontamination, plans for further study of gas-phase decontamination, and the current status of this work are discussed. 13 refs., 15 figs.

  8. tion des environs par quatre groupes prin-cipaux de polluants : i) les hydrocarbures

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    tion des environs par quatre groupes prin- cipaux de polluants : i) les hydrocarbures aromatiques simples; ii) les hydrocarbures aliphatiques ; iii) les hydrocarbures aroma- tiques polycycliques (HAP

  9. Text-Alternative Version: L Prize-PAR 38 Competition: A New Start

    Broader source: Energy.gov [DOE]

    Below is the text-alternative version of the "L Prize-PAR 38 Competition: A New Start" webcast, held March 27, 2012.

  10. Solar neutrinos, helicity effects and new affine gravity with torsion

    E-Print Network [OSTI]

    Diego Julio Cirilo-Lombardo; BLTP-JINR

    2013-10-18T23:59:59.000Z

    New f(R,T) model of gravitation, introduced previously by the author, is considered. It is based on an affine geometrical construction in which the torsion is a dynamical field, the coupling is minimal and the theory is Lorentz invariant by construction. It was shown that the Dirac equation emerges from the same space time and acquires a modification (coupling-like) of the form {\\gamma}^{{\\alpha}}j((1-d)/d){\\gamma}h_{{\\alpha}}, with h_{{\\alpha}} the torsion axial vector, j a parameter of pure geometrical nature and d, the spacetime dimension. In the present work it is shown that this interaction produces a mechanism of spin (helicity) flipping, with its consequent weak symmetry violation. The cross section of this process is explicitly calculated and a logaritmical energy dependence (even at high energies) is found. This behavior is reminiscent of similar computations made by Hans Bethe in the context of neutrino astrophysics. These results are applied to the solar neutrino case and compared with similar results coming from a gravitational model with torsion of string theory type and within the standard model context respectively.

  11. Importance of tumor affinity of nitroazoles in hypoxic radiosensitization

    SciTech Connect (OSTI)

    Kagiya, T.; Nishimoto, S.; Shibamoto, Y.; Wang, J.; Zhou, L.; He, Y.L.; Sasai, K.; Takahashi, M.; Abe, M.

    1989-04-01T23:59:59.000Z

    In vitro and in vivo sensitizing activities of a variety of nitroazole derivatives including misonidazole (MISO), SR-2508, and RSU-1069 were correlated by the aid of pharmacokinetic measurements of the drug uptake in animal solid tumors. The sensitizer enhancement ratio in vivo (SERvivo) on solid tumors increased linearly with the square root of administrated dose (Ds). The specific activity (A) in vivo of nitroazoles was evaluated from the square-root empirical relationship, SERvivo = 1.00 + A D1/2S. The intratumor concentration of nitroazoles at a given time t after administration was in proportion to the DS, in which the proportional constant was defined as the tumor-affinity factor FT,t. The absolute molar activity alpha M defined by A(M/FT,t)1/2, where M is the molecular weight of nitroazoles, showed a linear relationship with the SER in vitro (SERvitro) at 1 mM of sensitizers. The sensitizer dose required to achieve an SERvivo of 1.5 (DS,1.5) decreased and thus the overall sensitizing efficiency on animal solid tumors increased as the FT,t became greater.

  12. Liquefied Gaseous Fuels Safety and Environmental Control Assessment Program: second status report

    SciTech Connect (OSTI)

    None

    1980-10-01T23:59:59.000Z

    This document is arranged in three volumes and reports on progress in the Liquefied Gaseous Fuels (LGF) Safety and Environmental Control Assessment Program made in fiscal Year (FY)-1979 and early FY-1980. Volume 3 contains reports from 6 government contractors on LPG, anhydrous ammonia, and hydrogen energy systems. Report subjects include: simultaneous boiling and spreading of liquefied petroleum gas (LPG) on water; LPG safety research; state-of-the-art of release prevention and control technology in the LPG industry; ammonia: an introductory assessment of safety and environmental control information; ammonia as a fuel, and hydrogen safety and environmental control assessment.

  13. High-temperature sorbent method for removal of sulfur containing gases from gaseous mixtures

    DOE Patents [OSTI]

    Young, John E. (Woodridge, IL); Jalan, Vinod M. (Concord, MA)

    1984-01-01T23:59:59.000Z

    A copper oxide-zinc oxide mixture is used as a sorbent for removing hydrogen sulfide and other sulfur containing gases at high temperatures from a gaseous fuel mixture. This high-temperature sorbent is especially useful for preparing fuel gases for high temperature fuel cells. The copper oxide is initially reduced in a preconditioning step to elemental copper and is present in a highly dispersed state throughout the zinc oxide which serves as a support as well as adding to the sulfur sorption capacity. The spent sorbent is regenerated by high-temperature treatment with an air fuel, air steam mixture followed by hydrogen reduction to remove and recover the sulfur.

  14. The Stability of an Isentropic Model for a Gaseous Relativistic Star

    E-Print Network [OSTI]

    P. S. Negi

    2007-02-01T23:59:59.000Z

    We show that the isentropic subclass of Buchdahl's exact solution for a gaseous relativistic star is stable and gravitationally bound for all values of the compactness ratio $u [\\equiv (M/R)$, where $M$ is the total mass and $R$ is the radius of the configuration in geometrized units] in the range, $0 < u \\leq 0.20$, corresponding to the {\\em regular} behaviour of the solution. This result is in agreement with the expectation and opposite to the earlier claim found in the literature.

  15. High-temperature sorbent method for removal of sulfur containing gases from gaseous mixtures

    DOE Patents [OSTI]

    Young, J.E.; Jalan, V.M.

    1984-06-19T23:59:59.000Z

    A copper oxide-zinc oxide mixture is used as a sorbent for removing hydrogen sulfide and other sulfur containing gases at high temperatures from a gaseous fuel mixture. This high-temperature sorbent is especially useful for preparing fuel gases for high temperature fuel cells. The copper oxide is initially reduced in a preconditioning step to elemental copper and is present in a highly dispersed state throughout the zinc oxide which serves as a support as well as adding to the sulfur sorption capacity. The spent sorbent is regenerated by high-temperature treatment with an air fuel, air steam mixture followed by hydrogen reduction to remove and recover the sulfur.

  16. Measurement of the cross section for scattering of p. mu. atoms in gaseous hydrogen

    SciTech Connect (OSTI)

    Bystritskii, V.M.; Dzhelepov, V.P.; Petrukhin, V.I.; Rudenko, A.I.; Suvorov, V.M.; Fil'chenkov, V.V.; Khovanskii, N.N.; Khomenko, B.A.

    1984-08-01T23:59:59.000Z

    The muon beam of the synchrocyclotron at the Joint Institute for Nuclear Research has been used in an experiment with gaseous hydrogen at a pressure of 41 atm to measure the cross section for scattering of p..mu.. atoms by hydrogen molecules sigma(p..mu..+H/sub 2/) = (42 +- 8) x 10/sup -21/ cm/sup 2/, which corresponds to a cross section for scattering by free protons sigma(p..mu..+p) = (17.4 +- 3.3) x 10/sup -21/ cm/sup 2/.

  17. High-temperature sorbent method for removal of sulfur-containing gases from gaseous mixtures

    DOE Patents [OSTI]

    Young, J.E.; Jalan, V.M.

    1982-07-07T23:59:59.000Z

    A copper oxide-zinc oxide mixture is used as a sorbent for removing hydrogen sulfide and other sulfur containing gases at high temperatures from a gaseous fuel mixture. This high-temperature sorbent is especially useful for preparing fuel gases for high temperature fuel cells. The copper oxide is initially reduced in a preconditioning step to elemental copper and is present in a highly dispersed state throughout the zinc oxide which serves as a support as well as adding to the sulfur sorbtion capacity. The spent sorbent is regenerated by high-temperature treatment with an air fuel, air steam mixture followed by hydrogen reduction to remove and recover the sulfur.

  18. Fire protection review revisit No. 2, Paducah Gaseous Diffusion Plant, Paducah, Kentucky

    SciTech Connect (OSTI)

    Dobson, P.H.; Keller, D.R.; Treece, S.D.

    1990-02-01T23:59:59.000Z

    A fire protection survey was conducted for the Department of Energy at the Paducah Gaseous Diffusion Plant, Paducah, Kentucky, from October 30--November 4, November 6--10, and December 4--8, 1989. The purpose of the survey was to review the facility fire protection program and to make recommendations. Surveys of other facilities resulted in a classification system for buildings which provide an indication of the importance of the building to the fulfillment of the mission of the facility. Recommendations in this report reflect to some degree the relative importance of the facility and the time to restore it to useful condition in the event a loss were to occur.

  19. Construction and operation of an industrial solid waste landfill at Portsmouth Gaseous Diffusion Plant, Piketon, Ohio

    SciTech Connect (OSTI)

    NONE

    1995-10-01T23:59:59.000Z

    The US Department of Energy (DOE), Office of Waste Management, proposes to construct and operate a solid waste landfill within the boundary of the Portsmouth Gaseous Diffusion Plant (PORTS), Piketon, Ohio. The purpose of the proposed action is to provide PORTS with additional landfill capacity for non-hazardous and asbestos wastes. The proposed action is needed to support continued operation of PORTS, which generates non-hazardous wastes on a daily basis and asbestos wastes intermittently. Three alternatives are evaluated in this environmental assessment (EA): the proposed action (construction and operation of the X-737 landfill), no-action, and offsite shipment of industrial solid wastes for disposal.

  20. 2013 GASEOUS IONS GORDON RESEARCH CONFERENCE, FEBRUARY 24 - MARCH 1, 2013

    SciTech Connect (OSTI)

    Williams, Evan

    2013-03-01T23:59:59.000Z

    The Gaseous Ions: Structures, Energetics and Reactions Gordon Research Conference will focus on ions and their interactions with molecules, surfaces, electrons, and light. The long-standing goal of our community is to develop new strategies for capturing complex molecular architectures as gas phase ions where they can be isolated, characterized and manipulated with great sensitivity. Emergent areas of interest include catalytic mechanisms, cryogenic processing of ions extracted from solution, ion fragmentation mechanisms, and new methods for ion formation and structural characterization. The conference will cover theoretical and experimental advances on systems ranging from model studies at the molecular scale to preparation of nanomaterials and characterization of large biological molecules.

  1. Translational affine coherent states as exact solutions of the Wheeler-DeWitt equation

    E-Print Network [OSTI]

    Eyo Eyo Ita III; Chou Ching-Yi

    2014-09-26T23:59:59.000Z

    The Quantum Wheeler-DeWitt operator can be derived from an affine commutation relation via the affine group representation formalism for gravity, wherein a family of gauge-diffeomorphism invariant affine coherent states are constructed from a fiducial state. In this article, the role of the fiducial state is played by a regularized Gaussian peaked on densitized triad configurations corresponding to 3-metrics of constant spatial scalar curvature. The affine group manifold consists of points in the upper half plane, wherein each point is labeled by two local gravitational degrees of freedom from the Yamabe construction. From this viewpoint, here we show that the translational subgroup of affine coherent states constitute a set of exact solutions of the Wheeler-DeWitt equation. The affine translational parameter $b$ admits a physical interpretation analogous to a continuous plane wave energy spectrum, where the curvature constant $k$ plays the role of the energy. This result shows that the affine translational subgroup generates transformations in the curvature constant $k$ from the Yamabe problem, while $k$ is inert under the kinematic symmetries of gravity.

  2. Institut National Polytechnique de Grenoble No. attribu par la bibliothque

    E-Print Network [OSTI]

    Boyer, Edmond

    'un système de conversion de type VSC-HVDC. Stabilité - Contrôle des perturbations. Directeurs de thèse : M;#12;Table des matières 1 Introduction 17 2 Présentation des systèmes HVDC 25 2.1 Intérêts par rapport à une Modélisation des systèmes VSC-HVDC 31 3.1 Modélisation de la source puissance

  3. The Epic of Pabuji ki par in Performance

    E-Print Network [OSTI]

    Wickett, Elizabeth

    2010-10-19T23:59:59.000Z

    Occasional Paper 3 World Oral Literature Project v o i c e s o f v a n i s h i n g w o r l d s The Epic of Pabuji ki par in performance Elizabeth Wickett Published by: World Oral Literature Project University of Cambridge Museum of Archaeology... and Anthropology Downing Street Cambridge CB2 3DZ United Kingdom email: oralliteratureproject@gmail.com office phone: +44 (0)1223 333508 www.oralliterature.org ISBN: 978-0-9566052-1-4 © 2010 World Oral Literature Project All rights reserved. No parts...

  4. PARS II Enhancements - Igor Pedan, MA-63 | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2:Introduction toManagementOPAM PolicyOfEnergyOutreach toOverviewOverview P - .PARS II

  5. Par Pastoril e Agr cola S A | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLuOpenNorthOlympiaAnalysis) JumpPalcan sPaquin Energy and FuelPar

  6. Comment on "Revised electron affinity of SF6 from kinetic data" [J. Chem. Phys. 136, 121102 (2012)

    E-Print Network [OSTI]

    Martin, Jan M.L.

    2012-01-01T23:59:59.000Z

    Comment on "Revised electron affinity of SF6 from kinetic data" [J. Chem. Phys. 136, 121102 (2012://jcp.aip.org/about/rights_and_permissions #12;THE JOURNAL OF CHEMICAL PHYSICS 136, 197101 (2012) Comment on "Revised electron affinity of SF6 May 2012) [http://dx.doi.org/10.1063/1.4719180] The adiabatic electron affinity (AEA) of SF6 has been

  7. Project plan for the background soils project for the Paducah Gaseous Diffusion Plant, Paducah, Kentucky

    SciTech Connect (OSTI)

    NONE

    1995-09-01T23:59:59.000Z

    The Background Soils Project for the Paducah Gaseous Diffusion Plant (BSPP) will determine the background concentration levels of selected naturally occurring metals, other inorganics, and radionuclides in soils from uncontaminated areas in proximity to the Paducah Gaseous Diffusion Plant (PGDP) in Paducah, Kentucky. The data will be used for comparison with characterization and compliance data for soils, with significant differences being indicative of contamination. All data collected as part of this project will be in addition to other background databases established for the PGDP. The BSPP will address the variability of surface and near-surface concentration levels with respect to (1) soil taxonomical types (series) and (2) soil sampling depths within a specific soil profile. The BSPP will also address the variability of concentration levels in deeper geologic formations by collecting samples of geologic materials. The BSPP will establish a database, with recommendations on how to use the data for contaminated site assessment, and provide data to estimate the potential human and health and ecological risk associated with background level concentrations of potentially hazardous constituents. BSPP data will be used or applied as follows.

  8. The Radiochemical Analysis of Gaseous Samples (RAGS) Apparatus for Nuclear Diagnostics at the National Ignition Facility

    SciTech Connect (OSTI)

    Shaughnessy, D A; Velsko, C A; Jedlovec, D R; Yeamans, C B; Moody, K J; Tereshatov, E; Stoeffl, W; Riddle, A

    2012-05-11T23:59:59.000Z

    The RAGS (Radiochemical Analysis of Gaseous Samples) diagnostic apparatus was recently installed at the National Ignition Facility. Following a NIF shot, RAGS is used to pump the gas load from the NIF chamber for purification and isolation of the noble gases. After collection, the activated gaseous species are counted via gamma spectroscopy for measurement of the capsule areal density and fuel-ablator mix. Collection efficiency was determined by injecting a known amount of {sup 135}Xe into the NIF chamber, which was then collected with RAGS. Commissioning was performed with an exploding pusher capsule filled with isotopically enriched {sup 124}Xe and {sup 126}Xe added to the DT gas fill. Activated xenon species were recovered post-shot and counted via gamma spectroscopy. Results from the collection and commissioning tests are presented. The performance of RAGS allows us to establish a noble gas collection method for measurement of noble gas species produced via neutron and charged particle reactions in a NIF capsule.

  9. Liquefied Gaseous Fuels Safety and Environmental Control Assessment Program: second status report

    SciTech Connect (OSTI)

    Not Available

    1980-10-01T23:59:59.000Z

    The Assistant Secretary for Environment has responsibility for identifying, characterizing, and ameliorating the environmental, health, and safety issues and public concerns associated with commercial operation of specific energy systems. The need for developing a safety and environmental control assessment for liquefied gaseous fuels was identified by the Environmental and Safety Engineering Division as a result of discussions with various governmental, industry, and academic persons having expertise with respect to the particular materials involved: liquefied natural gas, liquefied petroleum gas, hydrogen, and anhydrous ammonia. This document is arranged in three volumes and reports on progress in the Liquefied Gaseous Fuels (LGF) Safety and Environmental Control Assessment Program made in Fiscal Year (FY)-1979 and early FY-1980. Volume 1 (Executive Summary) describes the background, purpose and organization of the LGF Program and contains summaries of the 25 reports presented in Volumes 2 and 3. Annotated bibliographies on Liquefied Natural Gas (LNG) Safety and Environmental Control Research and on Fire Safety and Hazards of Liquefied Petroleum Gas (LPG) are included in Volume 1.

  10. Site-specific earthquake response analysis for Paducah Gaseous Diffusion Plant, Paducah, Kentucky. Final report

    SciTech Connect (OSTI)

    Sykora, D.W.; Davis, J.J.

    1993-08-01T23:59:59.000Z

    The Paducah Gaseous Diffusion Plant (PGDP), owned by the US Department of Energy (DOE) and operated under contract by Martin Marietta Energy systems, Inc., is located southwest of Paducah, Kentucky. An aerial photograph and an oblique sketch of the plant are shown in Figures 1 and 2, respectively. The fenced portion of the plant consists of 748 acres. This plant was constructed in the 1950`s and is one of only two gaseous diffusion plants in operation in the United States; the other is located near Portsmouth, Ohio. The facilities at PGDP are currently being evaluated for safety in response to natural seismic hazards. Design and evaluation guidelines to evaluate the effects of earthquakes and other natural hazards on DOE facilities follow probabilistic hazard models that have been outlined by Kennedy et al. (1990). Criteria also established by Kennedy et al. (1990) classify diffusion plants as ``moderate hazard`` facilities. The US Army Engineer Waterways Experiment Station (WES) was tasked to calculate the site response using site-specific design earthquake records developed by others and the results of previous geotechnical investigations. In all, six earthquake records at three hazard levels and four individual and one average soil columns were used.

  11. A multispectral scanner survey of the United States Department of Energy's Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Not Available

    1991-06-01T23:59:59.000Z

    Airborne multispectral scanner data of the Paducah Gaseous Diffusion Plant (PGDP) and surrounding area were acquired during late spring 1990. This survey was conducted by the Remote Sensing Laboratory (RSL) which is operated by EG G Energy Measurements (EG G/EM) for the US Department of Energy (DOE) Nevada Operations Office. It was requested by the US Department of Energy (DOE) Environmental Audit Team which was reviewing environmental conditions at the facility. The objectives of this survey were to: (1) Acquire 12-channel, multispectral scanner data of the PGDP from an altitude of 3000 feet above ground level (AGL); (2) Acquire predawn, digital thermal infrared (TIR) data of the site from the same altitude; (3) Collect color and color-infrared (CIR) aerial photographs over the facilities; and (4) Illustrate how the analyses of these data could benefit environmental monitoring at the PGDP. This report summarizes the two multispectral scanner and aerial photographic missions at the Paducah Gaseous Diffusion Plant. Selected examples of the multispectral data are presented to illustrate its potential for aiding environmental management at the site. 4 refs., 1 fig., 2 tabs.

  12. The Blend Down Monitoring System Demonstration at the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Benton, J.; Close, D.; Johnson, W., Jr.; Kerr, P.; March-Leuba, J.; Mastal, E.; Moss, C.; Powell, D.; Sumner, J.; Uckan, T.; Vines, R.; Wright, P.D.

    1999-07-25T23:59:59.000Z

    Agreements between the governments of the US and the Russian Federation for the US purchase of low enriched uranium (LEU) derived from highly enriched uranium (HEU) from dismantled Russian nuclear weapons calls for the establishment of transparency measures to provide confidence that nuclear nonproliferation goals are being met. To meet these transparency goals, the agreements call for the installation of nonintrusive US instruments to monitor the down blending of HEU to LEU. The Blend Down Monitoring System (BDMS) has been jointly developed by the Los Alamos National Laboratory (LANL) and the Oak Ridge National Laboratory (ORNL) to continuously monitor {sup 235}U enrichments and mass flow rates at Russian blending facilities. Prior to its installation in Russian facilities, the BDMS was installed and operated in a UF{sub 6} flow loop in the Paducah Gaseous Diffusion Plant simulating flow and enrichment conditions expected in a typical down-blending facility. A Russian delegation to the US witnessed the equipment demonstration in June, 1998. To conduct the demonstration in the Paducah Gaseous Diffusion Plant (PGDP), the BDMS was required to meet stringent Nuclear Regulatory Commission licensing, safety and operational requirements. The Paducah demonstration was an important milestone in achieving the operational certification for the BDMS use in Russian facilities.

  13. Method and system for low-NO.sub.x dual-fuel combustion of liquid and/or gaseous fuels

    DOE Patents [OSTI]

    Gard, Vincent; Chojnacki, Dennis A; Rabovitser, Ioseph K

    2014-12-02T23:59:59.000Z

    A method and apparatus for combustion in which a pressurized preheated liquid fuel is atomized and a portion thereof flash vaporized, creating a mixture of fuel vapor and liquid droplets. The mixture is mixed with primary combustion oxidant, producing a fuel/primary oxidant mixture which is then injected into a primary combustion chamber in which the fuel/primary oxidant mixture is partially combusted, producing a secondary gaseous fuel containing hydrogen and carbon oxides. The secondary gaseous fuel is mixed with a secondary combustion oxidant and injected into the second combustion chamber wherein complete combustion of the secondary gaseous fuel is carried out. The resulting second stage flue gas containing very low amounts of NO.sub.x is then vented from the second combustion chamber.

  14. Discrete optimization methods to fit piecewise-affine models to data ...

    E-Print Network [OSTI]

    2015-03-09T23:59:59.000Z

    (a) A piecewise affine model with k = 2, fitting the eight data points. A = {ai}i?I .... where: i) for every j ? J, each group Aj is completely contained into the subdo-.

  15. Discrete optimization methods to fit piecewise-affine models to data ...

    E-Print Network [OSTI]

    Edoardo Amaldi

    2015-03-08T23:59:59.000Z

    Mar 8, 2015 ... polimi.it). Abstract: Fitting piecewise affine models to data points is a pervasive task in many scientific disciplines. In this work, we address the k- ...

  16. Computational analysis, design, and experimental validation of antibody binding affinity improvements beyond in vivo maturation

    E-Print Network [OSTI]

    Lippow, Shaun Matthew

    2007-01-01T23:59:59.000Z

    This thesis presents novel methods for the analysis and design of high-affinity protein interactions using a combination of high-resolution structural data and physics-based molecular models. First, computational analysis ...

  17. On the Power and Limitations of Affine Policies in Two-Stage Adaptive Optimization

    E-Print Network [OSTI]

    Bertsimas, Dimitris J.

    We consider a two-stage adaptive linear optimization problem under right hand side uncertainty with a min–max objective and give a sharp characterization of the power and limitations of affine policies (where the second ...

  18. Adsorption du mthanol par la montmorillonite (1) Faza ANNABI-BERGAYA

    E-Print Network [OSTI]

    Boyer, Edmond

    Adsorption du méthanol par la montmorillonite (1) Faïza ANNABI-BERGAYA C.N.R.S., Centre de Cedex. RÉSUMÉ L'adsorption du méthanol gazeux par des montmorillonites Li, Na, Ba et Ca, a été 1. R. Adsorption, Le recoupement des résultats a permis de mettre en évidence les points suivants

  19. REMARQUES SUR LE MMOIRE DE MM. NAGAOKA ET HONDA; Par CH.-ED. GUILLAUME.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    621 REMARQUES SUR LE MÉMOIRE DE MM. NAGAOKA ET HONDA; Par CH.-ED. GUILLAUME. 11 est facile de voir que le plissement des courbes d'aimantation et d'allongement constaté par MM. Nagaoka et Honda et Honda indique un point singulier des alliages, ou s'il s'agit d'un fait fortuit. J'ajou- terai que

  20. REMARQUES SUR LE TRAVAIL DE MM. NAGAOKA ET HONDA ; Par M. CH.-D. GUILLAUME

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    633 REMARQUES SUR LE TRAVAIL DE MM. NAGAOKA ET HONDA ; Par M. CH.-ÉD. GUILLAUME Les recherches de MM. Nagaolia et Honda sur la inagnéto- striction donnent lieu à deux genres de remarques : les unes que pour une proportion insignifiante dans les résultats énoncés par MM. Nagaoka et Honda, et que les

  1. Volatilit du dpt actif du thorium Par T. BARRATT et A. B. WOOD

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    198 Volatilité du dépôt actif du thorium Par T. BARRATT et A. B. WOOD [Woolwich Polytechnic]. Marsden et Darwini avaient proposé pour la série de transformations du thorium A le schéma suivant, Cet et thoriums C faites par Mlle Meitner 2 et Marsden et Wilson3ayant donné des résultats contradictoires, les

  2. MESURE DU PARCOURS MOYEN DES RAYONS 03B1 DU THORIUM PAR LA MTHODE PHOTOGRAPHIQUE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    MESURE DU PARCOURS MOYEN DES RAYONS 03B1 DU THORIUM PAR LA MÉTHODE PHOTOGRAPHIQUE Par Mme HENRIETTE thorium dans l'émulsion des plaques photo- graphiques, on déduit leur parcours moyen dans l'air à150 thorium a déjà fait l'objet de plusieurs mesures dont les résultats ne sont pas toujours concordants. Les

  3. PRESSION DE VAPEUR SATURANTE DU LITHIUM ENTRE 462 ET 642 Par Mlle M. MAUCHERAT,

    E-Print Network [OSTI]

    Boyer, Edmond

    d'Imphy) : ce mé- tal résiste très bien à l'action corrosive du lithium, je l'ai adopté aprèsPRESSION DE VAPEUR SATURANTE DU LITHIUM ENTRE 462° ET 642° Par Mlle M. MAUCHERAT, Faculté des Sciences de Marseille. Sommaire. - Dans ce travail on étudie la tension de vapeur saturante du lithium par

  4. Pars Plana Vitrectomy in Eyes Containing a Treated Posterior Uveal Melanoma

    E-Print Network [OSTI]

    Foster, William

    Pars Plana Vitrectomy in Eyes Containing a Treated Posterior Uveal Melanoma WILLIAM J. FOSTER, MD PURPOSE: To determine the safety of pars plana vitrec- tomy in eyes containing a treated posterior uveal treated with 125 I plaque radiotherapy (seven pa- tients) or transpupillary thermotherapy (two patients

  5. Diffraction de Fresnel des electrons diffuss lastiquement et inlastiquement par des crans semi-transparents

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1353 Diffraction de Fresnel des electrons diffusés élastiquement et inélastiquement par des écrans 1980) Résumé. 2014 L'application du principe de Huygens-Fresnel à l'étude de la diffraction par le bord légèrement divergent rend compte de l'allure générale des franges de Fresnel observées en microscopie

  6. Fusion rules for admissible representations of affine algebras: the case of $A_2^{(1)}$

    E-Print Network [OSTI]

    P. Furlan; A. Ch. Ganchev; V. B. Petkova

    1997-10-26T23:59:59.000Z

    We derive the fusion rules for a basic series of admissible representations of $\\hat{sl}(3)$ at fractional level $3/p-3$. The formulae admit an interpretation in terms of the affine Weyl group introduced by Kac and Wakimoto. It replaces the ordinary affine Weyl group in the analogous formula for the fusion rules multiplicities of integrable representations. Elements of the representation theory of a hidden finite dimensional graded algebra behind the admissible representations are briefly discussed.

  7. Reassessment of liquefaction potential and estimation of earthquake- induced settlements at Paducah Gaseous Diffusion Plant, Paducah, Kentucky. Final report

    SciTech Connect (OSTI)

    Sykora, D.W.; Yule, D.E.

    1996-04-01T23:59:59.000Z

    This report documents a reassessment of liquefaction potential and estimation of earthquake-induced settlements for the U.S. Department of Energy (DOE), Paducah Gaseous Diffusion Plant (PGDP), located southwest of Paducah, KY. The U.S. Army Engineer Waterways Experiment Station (WES) was authorized to conduct this study from FY91 to FY94 by the DOE, Oak Ridge Operations (ORO), Oak Ridge, TN, through Inter- Agency Agreement (IAG) No. DE-AI05-91OR21971. The study was conducted under the Gaseous Diffusion Plant Safety Analysis Report (GDP SAR) Program.

  8. EuroPar 2009 POGGI: Puzzle-Based Online Games on Grid Infrastructures POGGI: Puzzle-Based Online Games

    E-Print Network [OSTI]

    Iosup, Alexandru

    : The Lunar Lockout Puzzle Lunar Lockout, Yamamoto & Yoshigahara, 1998 #12;EuroPar 2009 ­ POGGI: Puzzle

  9. Indirect NMR detection of 235U in gaseous uranium hexafluoride National Center for Physics, P.O. Box MG-6, Bucharest, Romania

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    dans le UF6 gazeux. L'examen de la raie d'absorption du 19F appartenant au UF6 gazeux isotopiquement in indirect detection of the 235U nucleus in gaseous UF6 is discussed. The 19F absorption spectra linewidths in gaseous UF6 was investigated as a function of 235U enrichment, revealing a dependence on the isotope

  10. CONTRIBUTION A L'AUGMENTATION DE LA SENSIBILIT DES THERMOPILES Par MM. PIERRE BARCHEWITZ et JEAN TURCK.

    E-Print Network [OSTI]

    Boyer, Edmond

    tombant sur la thermopile et dans ce cas, on demande à celle-ci d'avoir un temps de réponse aussi faible- trique, celle-ci s'échauffe, sa température qui était initialement égale à la température To de la rayonnement, par conductibilité calorifique, par convection, par effet Peltier ou effet Joule, il s'établit un

  11. COMPTITION FISSION-SPALLATION DANS LES CIBLES DE THORIUM BOMBARDES PAR PROTONS DE 155 MeV

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    338. COMPÉTITION FISSION-SPALLATION DANS LES CIBLES DE THORIUM BOMBARDÉES PAR PROTONS DE 155 Me isotopes du thorium et de l'actinium, par bombardement de Th 232 par des protons de 155 MeV. Ces sections were made on the formation of several isotopes of thorium, and actinium, by bombarding Th 232 by 155 Me

  12. Meta-compilation non intrusive du filtrage par contraintes Non intrusive meta-compilation of matching by constraints

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    M´eta-compilation non intrusive du filtrage par contraintes Non intrusive meta´eta-compilation non intrusive du filtrage par contraintes Historique 31 ao^ut 2004 V 0.8 cr´eation du document 15 inria-00280939,version1-20May2008 #12;MANIFICO ­ M´eta-compilation non intrusive du filtrage par

  13. Perspectives of Micro-Pattern Gaseous Detector Technologies for Future Physics Projects

    E-Print Network [OSTI]

    Titov, Maxim

    2013-01-01T23:59:59.000Z

    A centenary after the invention of the basic principle of gas amplification, gaseous detectors - are still the first choice whenever the large area coverage with low material budget is required. Advances in photo-lithography and micro-processing techniques in the chip industry during the past two decades triggered a major transition in the field of gas detectors from wire structures to Micro-Pattern Gas Detector (MPGD) concepts, revolutionizing cell-size limitations for many gas detector applications. The high radiation resistance and excellent spatial and time resolution make them an invaluable tool to confront future detector challenges at the frontiers of research. The design of the new micro-pattern devices appears suitable for industrial production. In 2008, the RD51 collaboration at CERN has been established to further advance technological developments of MPGDs and associated electronic-readout systems, for applications in basic and applied research. This review provides an overview of the state-of-the...

  14. Liquefied Gaseous Fuels Safety and Environmental Control Assessment Program: second status report

    SciTech Connect (OSTI)

    None

    1980-10-01T23:59:59.000Z

    Volume 2 consists of 19 reports describing technical effort performed by Government Contractors in the area of LNG Safety and Environmental Control. Report topics are: simulation of LNG vapor spread and dispersion by finite element methods; modeling of negatively buoyant vapor cloud dispersion; effect of humidity on the energy budget of a liquefied natural gas (LNG) vapor cloud; LNG fire and explosion phenomena research evaluation; modeling of laminar flames in mixtures of vaporized liquefied natural gas (LNG) and air; chemical kinetics in LNG detonations; effects of cellular structure on the behavior of gaseous detonation waves under transient conditions; computer simulation of combustion and fluid dynamics in two and three dimensions; LNG release prevention and control; the feasibility of methods and systems for reducing LNG tanker fire hazards; safety assessment of gelled LNG; and a four band differential radiometer for monitoring LNG vapors.

  15. Apparatus for recovering gaseous hydrocarbons from hydrocarbon-containing solid hydrates

    DOE Patents [OSTI]

    Elliott, Guy R. B. (Los Alamos, NM); Barraclough, Bruce L. (Santa Fe, NM); Vanderborgh, Nicholas E. (Los Alamos, NM)

    1984-01-01T23:59:59.000Z

    A method and apparatus are provided for producing gaseous hydrocarbons from formations comprising solid hydrocarbon hydrates located under either a body of land or a body of water. The vast natural resources of such hydrocarbon hydrates can thus now be economically mined. Relatively warm brine or water is brought down from an elevation above that of the hydrates through a portion of the apparatus and passes in contact with the hydrates, thus melting them. The liquid then continues up another portion of the apparatus, carrying entrained hydrocarbon vapors in the form of bubbles, which can easily be separated from the liquid. After a short startup procedure, the process and apparatus are substantially self-powered.

  16. A probabilistic safety analysis of UF{sub 6} handling at the Portsmouth Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Boyd, G.J.; Lewis, S.R.; Summitt, R.L. [Safety and Reliability Optimization Services (SAROS), Inc., Knoxville, TN (United States)

    1991-12-31T23:59:59.000Z

    A probabilistic safety study of UF{sub 6} handling activities at the Portsmouth Gaseous Diffusion Plant has recently been completed. The analysis provides a unique perspective on the safety of UF{sub 6} handling activities. The estimated release frequencies provide an understanding of current risks, and the examination of individual contributors yields a ranking of important plant features and operations. Aside from the probabilistic results, however, there is an even more important benefit derived from a systematic modeling of all operations. The integrated approach employed in the analysis allows the interrelationships among the equipment and the required operations to be explored in depth. This paper summarizes the methods used in the study and provides an overview of some of the technical insights that were obtained. Specific areas of possible improvement in operations are described.

  17. Method and apparatus for removal of gaseous, liquid and particulate contaminants from molten metals

    DOE Patents [OSTI]

    Hobson, David O. (Oak Ridge, TN); Alexeff, Igor (Oak Ridge, TN); Sikka, Vinod K. (Clinton, TN)

    1988-01-01T23:59:59.000Z

    Method and apparatus for removal of nonelectrically-conducting gaseous, liquid, and particulate contaminants from molten metal compositions by applying a force thereto. The force (commonly referred to as the Lorentz Force) exerted by simultaneous application of an electric field and a magnetic field on a molten conductor causes an increase, in the same direction as the force, in the apparent specific gravity thereof, but does not affect the nonconducting materials. This difference in apparent densities cause the nonconducting materials to "float" in the opposite direction from the Lorentz Force at a rapid rate. Means are further provided for removal of the contaminants and prevention of stirring due to rotational forces generated by the applied fields.

  18. Method and apparatus for removal of gaseous, liquid and particulate contaminants from molten metals

    DOE Patents [OSTI]

    Hobson, D.O.; Alexeff, I.; Sikka, V.K.

    1987-08-10T23:59:59.000Z

    Method and apparatus for removal of nonelectrically-conducting gaseous, liquid, and particulate contaminants from molten metal compositions by applying a force thereto. The force (commonly referred to as the Lorentz Force) exerted by simultaneous application of an electric field and a magnetic field on a molten conductor causes an increase, in the same direction as the force, in the apparent specific gravity thereof, but does not affect the nonconducting materials. This difference in apparent densities cause the nonconducting materials to ''float'' in the opposite direction from the Lorentz Force at a rapid rate. Means are further provided for removal of the contaminants and prevention of stirring due to rotational forces generated by the applied fields. 6 figs.

  19. Gusty, gaseous flows of FIRE: galactic winds in cosmological simulations with explicit stellar feedback

    E-Print Network [OSTI]

    Muratov, Alexander L; Faucher-Giguere, Claude-Andre; Hopkins, Philip F; Quataert, Eliot; Murray, Norman

    2015-01-01T23:59:59.000Z

    We present an analysis of the galaxy-scale gaseous outflows from the FIRE (Feedback in Realistic Environments) simulations. This suite of hydrodynamic cosmological zoom simulations provides a sample of halos where star-forming giant molecular clouds are resolved to z=0, and features an explicit stellar feedback model on small scales. In this work, we focus on quantifying the gas mass ejected out of galaxies in winds and how this material travels through the halo. We correlate these quantities to star formation in galaxies throughout cosmic history. Our simulations reveal that a significant portion of every galaxy's evolution, particularly at high redshift, is dominated by bursts of star formation, which are followed by powerful gusts of galactic outflow that sweep up a large fraction of gas in the interstellar medium and send it through the circumgalactic medium. The dynamical effect of these outflows can significantly limit the amount of star formation within the affected galaxy. At low redshift, however, su...

  20. Local drainage analyses of the Paducah and Portsmouth Gaseous Diffusion Plants during an extreme storm

    SciTech Connect (OSTI)

    Johnson, R.O.; Wang, J.C.; Lee, D.W.

    1993-11-01T23:59:59.000Z

    Local drainage analyses have been performed for the Paducah and Portsmouth Gaseous Diffusion Plants during an extreme storm having an approximate 10,000-yr recurrence interval. This review discusses the methods utilized to accomplish the analyses in accordance with US Department of Energy (DOE) design and evaluation guidelines, and summarizes trends, results, generalizations, and uncertainties applicable to other DOE facilities. Results indicate that some culverts may be undersized, and that the storm sewer system cannot drain the influx of precipitation from the base of buildings. Roofs have not been designed to sustain ponding when the primary drainage system is clogged. Some underground tunnels, building entrances, and ground level air intakes may require waterproofing.

  1. Regional flood hazard assessment of the Paducah and Portsmouth Gaseous Diffusion Plants

    SciTech Connect (OSTI)

    Johnson, R.O.; Wang, J.C.; Lee, D.W.

    1991-01-01T23:59:59.000Z

    Regional flood-hazard assessments performed for the Paducah and Portsmouth Gaseous Diffusion Plants are reviewed, compared, and contrasted to determine the relationship of probable maximum flood methodology with respect to US Department of Energy design and evaluation guidelines. The Paducah assessment was carried out using probable maximum flood methodology, while the Portsmouth assessment utilized probabilistic techniques. Results indicated that regional flooding along nearby rivers would not inundate either plant, and that the guidelines were satisfied. A comparison of results indicated that the probable maximum flood recurrence interval associated with the Paducah assessment exceeded the 10,000 years depending on the choice of the probabilistic model used to perform the assessment. It was concluded, based on an analysis of two data points, that smaller watersheds driven by single event storms could be assessed using probabilistic techniques, while probable maximum flood methodology could be applied to larger drainage basins flooded by storm sequences. 32 refs., 3 figs.

  2. Report on the biological monitoring program at Paducah Gaseous Diffusion Plant December 1990 to November 1992

    SciTech Connect (OSTI)

    Kszos, L.A. [ed.

    1994-03-01T23:59:59.000Z

    On September 23, 1987, the Commonwealth of Kentucky Natural Resources and Environmental Protection Cabinet issued an Agreed Order that required the development of a Biological Monitoring Program (BMP) for the Paducah Gaseous Diffusion Plant (PGDP). Beginning in fall 1991, the Environmental Sciences Division (ESD) at Oak Ridge National Lab (ORNL) added data collection and report preparation to its responsibilities for the PGDP BMP. The BMP has been continued because it has proven to be extremely valuable in identifying those effluents with the potential for adversely affecting instream fauna, assessing the ecological health of receiving streams, guiding plans for remediation, and protecting human health. In September 1992, a renewed permit was issued which requires toxicity monitoring of continuous and intermittent outfalls on a quarterly basis. The BMP for PGDP consists of three major tasks: (1) effluent and ambient toxicity monitoring, (2) bioaccumulation studies, and (3) ecological surveys of stream communities. This report includes ESD/ORNL activities occurring from December 1990 to November 1992.

  3. Privatization of the gaseous diffusion plants and impacts on nuclear criticality safety administration

    SciTech Connect (OSTI)

    D`Aquila, D.M.; Holliday, R.T. [Lockheed Martin Utility Services, Inc., Piketon, OH (United States); Dean, J.C. [Lockheed Martin Utility Services, Inc., Paducah, KY (United States)

    1996-12-31T23:59:59.000Z

    The Energy Policy Act of 1992 created the United States Enrichment Corporation (USEC) on July 1, 1993. The USEC is a government-owned business that leases those Gaseous Diffusion Plant (GDP) facilities at the Portsmouth, Ohio, and Paducah, Kentucky, sites from the U.S. Department of Energy (DOE) that are required for enriching uranium. Lockheed Martin Utility Services is the operating contractor for the USEC-leased facilities. The DOE has retained use of, and regulation over, some facilities and areas at the Portsmouth and Paducah sites for managing legacy wastes and environmental restoration activities. The USEC is regulated by the DOE, but is currently changing to regulation under the U.S. Nuclear Regulatory Commission (NRC). The USEC is also preparing for privatization of the uranium enrichment enterprise. These changes have significantly affected the nuclear criticality safety (NCS) programs at the sites.

  4. Paducah Gaseous Diffusion Plant Annual Site Environmental Report summary for 1993

    SciTech Connect (OSTI)

    Not Available

    1994-11-01T23:59:59.000Z

    This report contains summaries of the environmental programs at Paducah Gaseous Diffusion Plant, environmental monitoring and the results, and the impact of operations on the environment and the public for 1993. The environmental monitoring program at Paducah includes effluent monitoring and environmental surveillance. Effluent monitoring is measurement of releases as they occur. Contaminants are released through either airborne emissions or liquids discharged from the plant. These releases occur as part of normal site operations, such as cooling water discharged from the uranium enrichment cascade operations or airborne releases from ventilation systems. In the event of system failure, this monitoring provides timely warning so that corrective action can be taken before releases reach an unsafe level. Environmental surveillance tracks the dispersion of materials into the environment after they have been released. This involves the collection of samples from various media, such as water, soil, vegetation, and food crops, and the analysis of these samples for certain radionuclides, chemicals, and metals.

  5. Seismically-induced soil amplification at the DOE Paducah Gaseous Diffusion Plant site

    SciTech Connect (OSTI)

    Sykora, D.W.; Haynes, M.E. (Army Engineer Waterways Experiment Station, Vicksburg, MS (United States). Geotechnical Lab.); Brock, W.R.; Hunt, R.J.; Shaffer, K.E. (Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States))

    1991-01-01T23:59:59.000Z

    A site-specific earthquake site response (soil amplification) study is being conducted for the Department of Energy (DOE), Paducah Gaseous Diffusion Plant (PGDP). This study is pursuant to an upgraded Final Safety Analysis Report in accordance with requirements specified by DOE. The seismic hazard at PGDP is dominated by the New Madrid Seismic Zone. Site-specific synthetic earthquake records developed by others were applied independently to four soil columns with heights above baserock of about 325 ft. The results for the 1000-year earthquake event indicate that the site period is between 1.0 and 1.5 sec. Incident shear waves are amplified at periods of motion greater than 0.15 sec. The peak free-field horizontal acceleration, occurring at very low periods, is 0.28 g. 13 refs., 13 figs.

  6. Report on the Biological Monitoring Program at Paducah Gaseous Diffusion Plant December 1992--December 1993

    SciTech Connect (OSTI)

    Kszos, L.A.; Hinzman, R.L.; Peterson, M.J.; Ryon, M.G.; Smith, J.G.; Southworth, G.R.

    1995-06-01T23:59:59.000Z

    On September 24, 1987, the Commonwealth of Kentucky Natural Resources and Environmental Protection Cabinet issued an Agreed Order that required the development of a Biological Monitoring Program (BMP) for the Paducah Gaseous Diffusion Plant (PGDP). The goals of BMP are to demonstrate that the effluent limitations established for PGDP protect and maintain the use of Little Bayou and Big Bayou creeks for growth and propagation of fish and other aquatic life, characterize potential health and environmental impacts, document the effects of pollution abatement facilities on stream biota, and recommend any program improvements that would increase effluent treatability. The BMP for PGDP consists of three major tasks: effluent and ambient toxicity monitoring, bioaccumulation studies, and ecological surveys of stream communities (i.e., benthic macroinvertebrates and fish). This report includes ESD activities occurring from December 1992 to December 1993, although activities conducted outside this time period are included as appropriate.

  7. Portsmouth Gaseous Diffusion Plant Annual Site Environmental Report summary for 1993

    SciTech Connect (OSTI)

    Not Available

    1994-11-01T23:59:59.000Z

    This report contains summaries of the environmental programs at Paducah Gaseous Diffusion Plant, environmental monitoring and the results, and the impact of operations on the environment and the public for 1993. The environmental monitoring program at Paducah includes effluent monitoring and environmental surveillance. Effluent monitoring is measurement of releases as they occur. Contaminants are released through either airborne emissions or liquids discharged from the plant. These releases occur as part of normal site operations, such as cooling water discharged from the uranium enrichment cascade operations or airborne releases from ventilation systems. In the event of system failure, this monitoring provides timely warning so that corrective action can be taken before releases reach an unsafe level. Environmental surveillance tracks the dispersion of materials into the environment after they have been released. This involves the collection of samples from various media, such as water, soil, vegetation, and food crops, and the analysis of these samples for certain radionuclides, chemicals, and metals.

  8. Composition, apparatus, and process, for sorption of gaseous compounds of group II-VII elements

    DOE Patents [OSTI]

    Tom, Glenn M. (New Milford, CT); McManus, James V. (Danbury, CT); Luxon, Bruce A. (Stamford, CT)

    1991-08-06T23:59:59.000Z

    Scavenger compositions are disclosed, which have utility for effecting the sorptive removal of hazardous gases containing Group II-VII elements of the Periodic Table, such as are widely encountered in the manufacture of semiconducting materials and semiconductor devices. Gas sorption processes including the contacting of Group II-VII gaseous compounds with such scavenger compositions are likewise disclosed, together with critical space velocity contacting conditions pertaining thereto. Further described are gas contacting apparatus, including mesh structures which may be deployed in gas contacting vessels containing such scavenger compositions, to prevent solids from being introduced to or discharged from the contacting vessel in the gas stream undergoing treatment. A reticulate heat transfer structure also is disclosed, for dampening localized exothermic reaction fronts when gas mixtures comprising Group II-VII constituents are contacted with the scavenger compositions in bulk sorption contacting vessels according to the invention.

  9. Apparatus and method for operating internal combustion engines from variable mixtures of gaseous fuels

    DOE Patents [OSTI]

    Heffel, James W.; Scott, Paul B.

    2003-09-02T23:59:59.000Z

    An apparatus and method for utilizing any arbitrary mixture ratio of multiple fuel gases having differing combustion characteristics, such as natural gas and hydrogen gas, within an internal combustion engine. The gaseous fuel composition ratio is first sensed, such as by thermal conductivity, infrared signature, sound propagation speed, or equivalent mixture differentiation mechanisms and combinations thereof which are utilized as input(s) to a "multiple map" engine control module which modulates selected operating parameters of the engine, such as fuel injection and ignition timing, in response to the proportions of fuel gases available so that the engine operates correctly and at high efficiency irrespective of the gas mixture ratio being utilized. As a result, an engine configured according to the teachings of the present invention may be fueled from at least two different fuel sources without admixing constraints.

  10. Apparatus and method for operating internal combustion engines from variable mixtures of gaseous fuels

    DOE Patents [OSTI]

    Heffel, James W. (Lake Matthews, CA); Scott, Paul B. (Northridge, CA); Park, Chan Seung (Yorba Linda, CA)

    2011-11-01T23:59:59.000Z

    An apparatus and method for utilizing any arbitrary mixture ratio of multiple fuel gases having differing combustion characteristics, such as natural gas and hydrogen gas, within an internal combustion engine. The gaseous fuel composition ratio is first sensed, such as by thermal conductivity, infrared signature, sound propagation speed, or equivalent mixture differentiation mechanisms and combinations thereof which are utilized as input(s) to a "multiple map" engine control module which modulates selected operating parameters of the engine, such as fuel injection and ignition timing, in response to the proportions of fuel gases available so that the engine operates correctly and at high efficiency irrespective of the gas mixture ratio being utilized. As a result, an engine configured according to the teachings of the present invention may be fueled from at least two different fuel sources without admixing constraints.

  11. Liquefied gaseous fuels safety and environmental control assessment program: third status report

    SciTech Connect (OSTI)

    Not Available

    1982-03-01T23:59:59.000Z

    This Status Report contains contributions from all contractors currently participating in the DOE Liquefied Gaseous Fuels (LG) Safety and Environmental Control Assessment Program and is presented in two principal sections. Section I is an Executive Summary of work done by all program participants. Section II is a presentation of fourteen individual reports (A through N) on specific LGF Program activities. The emphasis of Section II is on research conducted by Lawrence Livermore National Laboratory (Reports A through M). Report N, an annotated bibliography of literature related to LNG safety and environmental control, was prepared by Pacific Northwest Laboratory (PNL) as part of its LGF Safety Studies Project. Other organizations who contributed to this Status Report are Aerojet Energy Conversion Company; Applied Technology Corporation; Arthur D. Little, Incorporated; C/sub v/ International, Incorporated; Institute of Gas Technology; and Massachusetts Institute of Technology. Separate abstracts have been prepared for Reports A through N for inclusion in the Energy Data Base.

  12. Selective Gaseous Extraction: Research, Development and Training for Isotope Production, Final Technical Report

    SciTech Connect (OSTI)

    Bertch, Timothy C, [General Atomics

    2014-03-31T23:59:59.000Z

    General Atomics and the University of Missouri Research Reactor (MURR) completed research and development of selective gaseous extraction of fission products from irradiated fuel, which included training and education of MURR students. The process used porous fuel and after irradiation flowed product gases through the fuel to selectively removed desired fission products with the primary goal of demonstrating the removal of rhodium 105. High removal rates for the ruthenium/rhodium (Ru/Rh), tellurium/iodine (Te/I) and molybdenum/technetium (Mo/Tc) series were demonstrated. The success of this research provides for the reuse of the target for further production, significantly reducing the production of actinide wastes relative to processes that dissolve the target. This effort was conducted under DOE funding (DE-SC0007772). General Atomics objective of the project was to conduct R&D on alternative methods to produce a number of radioactive isotopes currently needed for medical and industry applications to include rhodium-105 and other useful isotopes. Selective gaseous extraction was shown to be effective at removing radioisotopes of the ruthenium/rhodium, tellurium/iodine and molybdenum/technetium decay chains while having trace to no quantities of other fission products or actinides. This adds a new, credible method to the area of certain commercial isotope production beyond current techniques, while providing significant potential reduction of process wastes. Waste reduction, along with reduced processing time/cost provides for superior economic feasibility which may allow domestic production under full cost recovery practices. This provides the potential for improved access to domestically produced isotopes for medical diagnostics and treatment at reduced cost, providing for the public good.

  13. Inverted end-Hall-type low-energy high-current gaseous ion source

    SciTech Connect (OSTI)

    Oks, E. M.; Vizir, A. V.; Shandrikov, M. V.; Yushkov, G. Yu.; Grishin, D. M.; Anders, A.; Baldwin, D. A. [High Current Electronics Institute, Russian Academy of Sciences, Tomsk 634055 (Russian Federation); Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); 4Wave, Inc., Sterling, Virginia 20166 (United States)

    2008-02-15T23:59:59.000Z

    A novel approach to low-energy, high-current, gaseous ion beam generation was explored and an ion source based on this technique has been developed. The source utilizes a dc high-current (up to 20 A) gaseous discharge with electron injection into the region of ion generation. Compared to the conventional end-Hall ion source, the locations of the discharge anode and cathode are inverted: the cathode is placed inside the source and the anode outside, and correspondingly, the discharge current is in the opposite direction. The discharge operates in a diverging axial magnetic field, similar to the end-Hall source. Electron generation and injection is accomplished by using an additional arc discharge with a ''cold'' (filamentless) hollow cathode. Low plasma contamination is achieved by using a low discharge voltage (avoidance of sputtering), as well as by a special geometric configuration of the emitter discharge electrodes, thereby filtering (removing) the erosion products stemming from the emitter cathode. The device produces a dc ion flow with energy below 20 eV and current up to 2.5 A onto a collector of 500 cm{sup 2} at 25 cm from the source edge, at a pressure {>=}0.02 Pa and gas flow rate {>=}14 SCCM. The ion energy spread is 2 to 3 eV (rms). The source is characterized by high reliability, low maintenance, and long lifetime. The beam contains less than 0.1% of metallic ions. The specific electric energy consumption is 400 eV per ion registered at the collector. The source operates with noble gases, nitrogen, oxygen, and hydrocarbons. Utilizing biasing, it can be used for plasma sputtering, etching, and other ion technologies.

  14. The Effect of Debris on Collector Optics, its Mitigation and Repair: Next-Step a Gaseous Sn EUV DPP Source

    E-Print Network [OSTI]

    Spila, Timothy P.

    The Effect of Debris on Collector Optics, its Mitigation and Repair: Next-Step a Gaseous Sn EUV DPP to advanced fuel plasma EUV sources is collector lifetime. The Illinois Debris-mitigation EUV Applications based on this work. Keywords: EUV source, debris, optics, collector lifetime, mitigation, plasma

  15. Delafosse, D. 2012. "Chapter 9 -Hydrogen Effects on the Plasticity of Face Centred Cubic (fcc) Crystals." In Gaseous Hydrogen Embrittlement of Materials in Energy Technologies, edited by Richard P Gangloff and B P Somerday,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ) Crystals." In Gaseous Hydrogen Embrittlement of Materials in Energy Technologies, edited by Richard P-11May2014 Author manuscript, published in "Gaseous hydrogen embrittlement of materials in energy) Crystals." In Gaseous Hydrogen Embrittlement of Materials in Energy Technologies, edited by Richard P

  16. Fusion rules and complete reducibility of certain modules for affine Lie algebras

    E-Print Network [OSTI]

    Drazen Adamovic; Ozren Perse

    2013-03-26T23:59:59.000Z

    We develop a new method for obtaining branching rules for affine Kac-Moody Lie algebras at negative integer levels. This method uses fusion rules for vertex operator algebras of affine type. We prove that an infinite family of ordinary modules for affine vertex algebra of type A investigated in Adamovi\\'c and O. Per\\v{s}e (2008) is closed under fusion. Then we apply these fusion rules on explicit bosonic realization of level -1 modules for the affine Lie algebra of type $A_{\\ell-1}^{(1)}$, obtain a new proof of complete reducibility for these representations, and the corresponding decomposition for $\\ell \\ge 3$. We also obtain the complete reducibility of the associated level -1 modules for affine Lie algebra of type $C_{\\ell}^{(1)}$. Next we notice that the category of $D_{2 \\ell -1}^{(1)}$ modules at level $- 2 \\ell +3 $ obtained in Per\\v{s}e (2012) has the isomorphic fusion algebra. This enables us to decompose certain $E_6 ^{(1)}$ and $F_4 ^{(1)}$--modules at negative levels.

  17. Contamination des mollusques bivalves par des phycotoxines : interactions entre niveaux de toxicit et rponses physiologiques

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Contamination des mollusques bivalves par des phycotoxines : interactions entre niveaux de principaux types de phycotoxines peuvent contaminer les mollusques bivalves : les toxines diarrhéiques (DSP nécessite de connaître au préalable les conditions initiales de contamination des mollusques ainsi que les

  18. u.s. Dl!PAR1'M:ENT OF ENERGY EERE PROJECT MANAGEMENT CENTER

    Broader source: Energy.gov (indexed) [DOE]

    PAR1'M:ENT OF ENERGY EERE PROJECT MANAGEMENT CENTER NEPA DETERlIIINATION RECIPIENT :University of California San Diego PROJECT TITL.E: San Diego Center for Algae Biotechnology Page...

  19. LA SARCOSPORIDIOSE DES RUMINANTS AU MAROC ETUDE EPIDEMIOLOGIQUE PAR DEUX TECHNIQUES HISTOLOGIQUES

    E-Print Network [OSTI]

    Boyer, Edmond

    LA SARCOSPORIDIOSE DES RUMINANTS AU MAROC ETUDE EPIDEMIOLOGIQUE PAR DEUX TECHNIQUES HISTOLOGIQUES Agronomique et Vétérinaire Hassan Il. B.P. 704 - Rabat - Agdal. Maroc &dquo; Département de Parasitologie

  20. Superconformal Chern-Simons Partition Functions of Affine D-type Quiver from Fermi Gas

    E-Print Network [OSTI]

    Sanefumi Moriyama; Tomoki Nosaka

    2015-04-29T23:59:59.000Z

    We consider the partition function of the superconformal Chern-Simons theory with the quiver diagram being the affine D-type Dynkin diagram. Rewriting the partition function into that of a Fermi gas system, we show that the perturbative expansions in 1/N are summed up to an Airy function, as in the ABJM theory or more generally the theory of the affine A-type quiver. As a corollary, this provides a proof for the previous proposal in the large N limit. For the special values of the Chern-Simons levels, we further identify three species of the membrane instantons.

  1. Fullerene Cyanation Does Not Always Increase Electron Affinity: Experimental and Theoretical Study

    SciTech Connect (OSTI)

    Clikeman, Tyler T.; Deng, Shihu; Popov, Alexey A.; Wang, Xue B.; Strauss, Steven H.; Boltalina, Olga V.

    2015-01-01T23:59:59.000Z

    The electron affinities of C70 derivatives with trifluoromethyl, methyl and cyano groups were studied experimentally and theoretically using low-temperature photoelectron spectroscopy (LT PES) and density functional theory (DFT). The electronic effects of these functional groups were determined and found to be highly dependent on the addition patterns. Substitution of CF3 for CN for the same addition pattern increases the experimental electron affinity by 70 meV per substitution. The synthesis of a new fullerene derivative, C70(CF3)10(CN)2, is reported for the first time

  2. Calculation of releases of radioactive materials in gaseous and liquid effluents from pressurized water reactors (PWR-GALE Code). Revision 1

    SciTech Connect (OSTI)

    Chandrasekaran, T.; Lee, J.Y.; Willis, C.A.

    1985-04-01T23:59:59.000Z

    This report revises the original issuance of NUREG-0017, ''Calculation of Releases of Radioactive Materials in Gaseous and Liquid Effluents from Pressurized Water Reactors (PWR-GALE-Code)'' (April 1976), to incorporate more recent operating data now available as well as the results of a number of in-plant measurement programs at operating pressurized water reactors. The PWR-GALE Code is a computerized mathematical model for calculating the releases of radioactive material in gaseous and liquid effluents (i.e., the gaseous and liquid source terms). The US Nuclear Regulatory Commission uses the PWR-GALE Code to determine conformance with the requirements of Appendix I to 10 CFR Part 50.

  3. TREATMENT OF GASEOUS EFFLUENTS ISSUED FROM RECYCLING – A REVIEW OF THE CURRENT PRACTICES AND PROSPECTIVE IMPROVEMENTS

    SciTech Connect (OSTI)

    Patricia Paviet-Hartmann; William Kerlin; Steven Bakhtiar

    2010-11-01T23:59:59.000Z

    The objectives of gaseous waste management for the recycling of nuclear used fuel is to reduce by best practical means (ALARA) and below regulatory limits, the quantity of activity discharged to the environment. The industrial PUREX process recovers the fissile material U(VI) and Pu(IV) to re-use them for the fabrication of new fuel elements e.g. recycling plutonium as a Mixed Oxide (MOX) fuel or recycling uranium for new enrichment for Pressurized Water Reactor (PWR). Meanwhile the separation of the waste (activation and fission product) is performed as a function of their pollution in order to store and avoid any potential danger and release towards the biosphere. Raffinate, that remains after the extraction step and which contains mostly all fission products and minor actinides is vitrified, the glass package being stored temporarily at the recycling plant site. Hulls and end pieces coming from PWR recycled fuel are compacted by means of a press leading to a volume reduced to 1/5th of initial volume. An organic waste treatment step will recycle the solvent, mainly tri-butyl phosphate (TBP) and some of its hydrolysis and radiolytic degradation products such as dibutyl phosphate (HDPB) and monobutyl phosphate (H2MBP). Although most scientific and technological development work focused on high level waste streams, a considerable effort is still under way in the area of intermediate and low level waste management. Current industrial practices for the treatment of gaseous effluents focusing essentially on Iodine-129 and Krypton-85 will be reviewed along with the development of novel technologies to extract, condition, and store these fission products. As an example, the current industrial practice is to discharge Kr-85, a radioactive gas, entirely to the atmosphere after dilution, but for the large recycling facilities envisioned in the near future, several techniques such as 1) cryogenic distillation and selective absorption in solvents, 2) adsorption on activated charcoal, 3) selective sorption on chemical modified zeolites, or 4) diffusion through membranes with selective permeability are potential technologies to retain the gas.

  4. Impact of nitrate-enhanced leachate recirculation on gaseous releases from a landfill bioreactor cell

    SciTech Connect (OSTI)

    Tallec, G.; Bureau, C. [Cemagref, UR HBAN, Parc de Tourvoie, BP44, F-92163 Antony (France); Peu, P.; Benoist, J.C. [Cemagref, UR GERE, 17 Avenue de Cucille, CS 64427, F-35044 Rennes (France); Lemunier, M. [Suez-Environnement, CIRADE, 38 Av. Jean Jaures, 78440 Gargenville (France); Budka, A.; Presse, D. [SITA France, 132 Rue des 3 Fontanot, 92000 Nanterre Cedex (France); Bouchez, T. [Cemagref, UR HBAN, Parc de Tourvoie, BP44, F-92163 Antony (France)], E-mail: theodore.bouchez@cemagref.fr

    2009-07-15T23:59:59.000Z

    This study evaluates the impact of nitrate injection on a full scale landfill bioreactor through the monitoring of gaseous releases and particularly N{sub 2}O emissions. During several weeks, we monitored gas concentrations in the landfill gas collection system as well as surface gas releases with a series of seven static chambers. These devices were directly connected to a gas chromatograph coupled to a flame ionisation detector and an electron capture detector (GC-FID/ECD) placed directly on the field. Measurements were performed before, during and after recirculation of raw leachate and nitrate-enhanced leachate. Raw leachate recirculation did not have a significant effect on the biogas concentrations (CO{sub 2}, CH{sub 4} and N{sub 2}O) in the gas extraction network. However, nitrate-enhanced leachate recirculation induced a marked increase of the N{sub 2}O concentrations in the gas collected from the recirculation trench (100-fold increase from 0.2 ppm to 23 ppm). In the common gas collection system however, this N{sub 2}O increase was no more detectable because of dilution by gas coming from other cells or ambient air intrusion. Surface releases through the temporary cover were characterized by a large spatial and temporal variability. One automated chamber gave limited standard errors over each experimental period for N{sub 2}O releases: 8.1 {+-} 0.16 mg m{sup -2} d{sup -1} (n = 384), 4.2 {+-} 0.14 mg m{sup -2} d{sup -1} (n = 132) and 1.9 {+-} 0.10 mg m{sup -2} d{sup -1} (n = 49), during, after raw leachate and nitrate-enhanced leachate recirculation, respectively. No clear correlation between N{sub 2}O gaseous surface releases and recirculation events were evidenced. Estimated N{sub 2}O fluxes remained in the lower range of what is reported in the literature for landfill covers, even after nitrate injection.

  5. REMARQUES SUR LE MMOIRE DE MM. NAGAOKA ET HONDA; Par CH.-ED. GUILLAUME.

    E-Print Network [OSTI]

    Boyer, Edmond

    621 REMARQUES SUR LE M�MOIRE DE MM. NAGAOKA ET HONDA; Par CH.-ED. GUILLAUME. 11 est facile de voir que le plissement des courbes d'aimantation et d'allongement constaté par MM. Nagaoka et Honda et Honda indique un point singulier des alliages, ou s'il s'agit d'un fait fortuit. J'ajou- terai que

  6. Sur le parcours des rayons 03B1 de l'uranium Par Lon BLOCH,

    E-Print Network [OSTI]

    Boyer, Edmond

    Sur le parcours des rayons 03B1 de l'uranium Par Léon BLOCH, Agrégé de l'Université de Paris parcours des rayons x de l'uranium a été dé- terminé par Bragg1 au moyen d'une méthode indirecte. Bragg a mesuré l'ionisatiol totale due au rayonnement de l'uranium lorsque la substance est recouverte d

  7. LA GESTION DE L'EAU PAR LES ASSOCIATIONS DE PROPRITAIRES FONCIERS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    LA GESTION DE L'EAU PAR LES ASSOCIATIONS DE PROPRI�TAIRES FONCIERS Méthodologie pour un, est posée la question du devenir de ces structures et de leur participation à une gestion de l'eau à gestion à long terme de ces structures et de la ressource en eau, notamment par les acteurs locaux grâce à

  8. Environmental restoration and waste management site specific plan for Oak Ridge Operation Office Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Not Available

    1990-07-18T23:59:59.000Z

    The Paducah Gaseous Diffusion Plant (PGDP) occupies 748 security-fenced acres located on a 3,400-acre tract in McCracken County, Kentucky, which was previously part of the Kentucky Ordnance Works. The principle objective on-site process at PGDP is the separation of uranium isotopes through gaseous diffusion. The process produces enriched uranium, which is used for nuclear fuel in commercial power plants and for military purposes. This document provides an overview of the major environmental and waste management concerns at PGDP, requirements for implementation, organization/management, corrective activities, environmental restoration, waste management options, compliance with National Environmental Policy Act (NEPA), reporting and data management, quality assurance and federal, state and local interactions. 12 refs., 6 figs., 5 tabs.

  9. Postplasma particle dynamics in a Gaseous Electronics Conference RF Reference Cell

    SciTech Connect (OSTI)

    Collins, S.M. [Department of Electrical and Computer Engineering, University of Arizona, Tucson, Arizona 85721 (United States)] [Department of Electrical and Computer Engineering, University of Arizona, Tucson, Arizona 85721 (United States); Brown, D.A. [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)] [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States); O`Hanlon, J.F.; Carlile, R.N. [Department of Electrical and Computer Engineering, University of Arizona, Tucson, Arizona 85721 (United States)] [Department of Electrical and Computer Engineering, University of Arizona, Tucson, Arizona 85721 (United States)

    1995-11-01T23:59:59.000Z

    Particle contamination in plasma tools used for the manufacture of very large scale integrated semiconductor devices on silicon wafers is a major cause of yield loss. Understanding the dynamics of particle movement in the postplasma regime is important to explain the process of their transport to the wafer. The movement of particle contamination in a Gaseous Electronics Conference RF Reference Cell in the postplasma regime was investigated using a novel technique. Particle clouds were observed using laser light scattering together with an image intensifier and a monochromator. This technique allowed particle clouds of low density, that could not otherwise be detected, to be seen. Video analysis of the particles showed movement of the cloud front during the first second after the plasma was extinguished. Using the particle terminal velocity to estimate particle size, we estimate diameters of 0.11 {mu}m in argon and 0.05 {mu}m in krypton. The role of the thermophoretic force on particles during the postplasma was shown to be larger than gravitational forces and to dominate particle transport for small particles under the conditions investigated. A temperature gradient of 12 {degree}C/cm was observed to move these particles away from a warm electrode as the plasma was extinguished and the particles were released from the electrostatic confinement forces generated by the plasma. {copyright} {ital 1995} {ital American} {ital Vacuum} {ital Society}

  10. On the possible environmental effect in distributing heavy elements beyond individual gaseous halos

    E-Print Network [OSTI]

    Johnson, Sean D; Mulchaey, John S

    2015-01-01T23:59:59.000Z

    We present a study of extended galaxy halo gas through HI and OVI absorption over two decades in projected distance at $z\\approx0.2$. The study is based on a sample of $95$ galaxies from a highly complete ($ > 80\\%$) survey of faint galaxies ($L > 0.1L_*$) with archival quasar absorption spectra and $53$ galaxies from the literature. A clear anti-correlation is found between HI (OVI) column density and virial radius normalized projected distance, $d/R_{\\rm h}$. Strong HI (OVI) absorption systems with column densities greater than $10^{14.0}$ ($10^{13.5}$) cm$^{-2}$ are found for $48$ of $54$ ($36$ of $42$) galaxies at $d R_{\\rm h}$ compared to isolated galaxies ($\\kappa_{\\rm OVI}\\approx0.13$ versus $0.04$) but no excess HI absorption. These findings suggest that environmental effects play a role in distributing heavy elements beyond the enriched gaseous halos of individual galaxies. Finally, we find that differential HI and OVI absorption between early- and late-type galaxies continues from $d < R_{\\rm h}$...

  11. Safeguards Verification Measurements using Laser Ablation, Absorbance Ratio Spectrometry in Gaseous Centrifuge Enrichment Plants

    SciTech Connect (OSTI)

    Anheier, Norman C.; Cannon, Bret D.; Kulkarni, Gourihar R.; Munley, John T.; Nelson, Danny A.; Qiao, Hong (Amy) [Amy; Phillips, Jon R.

    2012-07-17T23:59:59.000Z

    Laser Ablation Absorbance Ratio Spectrometry (LAARS) is a new verification measurement technology under development at the US Department of Energy (DOE) Pacific Northwest National Laboratory (PNNL). LAARS uses three lasers to ablate and then measure the relative isotopic abundance of uranium compounds. An ablation laser is tightly focused on uranium-bearing solids, producing a small atomic uranium vapor plume. Two collinear wavelength-tuned spectrometry lasers transit through the plume and the absorbance of U-235 and U-238 isotopes are measured to determine U-235 enrichment. The measurement is independent of chemical form and degree of dilution with nuisance dust and other materials. LAARS has high relative precision and detection limits approaching the femtogram range for U-235. The sample is scanned and assayed point-by-point at rates reaching 1 million measurements/hour, enabling LAARS to detect and analyze uranium in trace samples. The spectrometer is assembled using primarily commercially available components and features a compact design and automated analysis.Two specific gaseous centrifuge enrichment plant (GCEP) applications of the spectrometer are currently under development: 1) LAARS-Environmental Sampling (ES), which collects and analyzes aerosol particles for GCEP misuse detection and 2) LAARS-Destructive Assay (DA), which enables onsite enrichment DA sample collection and analysis for protracted diversion detection. The two applications propose game-changing technological advances in GCEP safeguards verification.

  12. An aerial radiological survey of the Paducah Gaseous Diffusion Plant and surrounding area, Paducah, Kentucky

    SciTech Connect (OSTI)

    Not Available

    1992-11-01T23:59:59.000Z

    An aerial radiological survey of the Paducah Gaseous Diffusion Plant (PGDP) and surrounding area in Paducah, Kentucky, was conducted during May 15--25, 1990. The purpose of the survey was to measure and document the terrestrial radiological environment at the PGDP and surrounding area for use in effective environmental management and emergency response planning. The aerial survey was flown at an altitude of 61 meters (200 feet) along a series of parallel lines 107 meters (350 feet) apart. The survey encompassed an area of 62 square kilometers (24 square miles), bordered on the north by the Ohio River. The results of the aerial survey are reported as inferred exposure rates at 1 meter above ground level in the form of a gamma radiation contour map. Typical background exposure rates were found to vary from 5 to 12 microroentgens per hour ([mu]R/h). Protactinium-234m, a radioisotope indicative of uranium-238, was detected at several facilities at the PGDR. In support of the aerial survey, ground-based exposure rate and soil sample measurements were obtained at several sites within the survey perimeter. The results of the aerial and ground-based measurements were found to agree within [plus minus]15%.

  13. Design and reliability optimization of a MEMS micro-hotplate for combustion of gaseous fuel

    SciTech Connect (OSTI)

    Manginell, R. P.

    2012-03-01T23:59:59.000Z

    This report will detail the process by which the silicon carbide (SiC) microhotplate devices, manufactured by GE, were imaged using IR microscopy equipment available at Sandia. The images taken were used as inputs to a finite element modeling (FEM) process using the ANSYS software package. The primary goal of this effort was to determine a method to measure the temperature of the microhotplate. Prior attempts to monitor the device's temperature by measuring its resistance had proven to be unreliable due to the nonlinearity of the doped SiC's resistance with temperature. As a result of this thermal modeling and IR imaging, a number of design recommendations were made to facilitate this temperature measurement. The lower heating value (LHV) of gaseous fuels can be measured with a catalyst-coated microhotplate calorimeter. GE created a silicon carbide (SiC) based microhotplate to address high-temperature survivability requirements for the application. The primary goal of this effort was to determine a method to measure the temperature of the microhotplate. Prior attempts to monitor the device's temperature by measuring its resistance had proven to be unreliable due to the non-linearity of the doped SiC's resistance with temperature. In this work, thermal modeling and IR imaging were utilized to determine the operation temperature as a function of parameters such as operation voltage and device sheet resistance. A number of design recommendations were made according to this work.

  14. Environmental Survey preliminary report, Oak Ridge Gaseous Diffusion Plant, Oak Ridge, Tennessee

    SciTech Connect (OSTI)

    Not Available

    1989-02-01T23:59:59.000Z

    This report presents the preliminary findings from the first phase of the Environmental Survey of the US Department of Energy's (DOE) Oak Ridge Gaseous Diffusion Plant (ORGDP) conducted March 14 through 25, 1988. The Survey is being conducted by an interdisciplinary team of environmental specialists, led and managed by the Office of Environment, Safety and Health's Office of Environmental Audit. Individual team components are being supplied by a private contractor. The objective of the Survey is to identify environmental risk associated with ORGDP. The Survey covers all environmental media and all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. This phase of the Survey involves the review of existing site environmental data, observations of the operations carried on at ORGDP, and interviews with site personnel. The Survey team developed a Sampling and Analysis Plan to assist in further assessing certain of the environmental problems identified during is on-site activities. The Sampling and Analysis Plan will be executed by Idaho National Engineering Laboratory (INEL). When completed, the results will be incorporated into the ORGDP Survey findings for in inclusion into the Environmental Survey Summary Report. 120 refs., 41 figs., 74 tabs.

  15. The effect of stellar feedback on a Milky Way-like galaxy and its gaseous halo

    E-Print Network [OSTI]

    Marasco, Antonino; Fraternali, Filippo; van der Hulst, Thijs; Wadsley, James; Quinn, Thomas; Roškar, Rok

    2015-01-01T23:59:59.000Z

    We present the study of a set of N-body+SPH simulations of a Milky Way-like system produced by the radiative cooling of hot gas embedded in a dark matter halo. The galaxy and its gaseous halo evolve for 10 Gyr in isolation, which allows us to study how internal processes affect the evolution of the system. We show how the morphology, the kinematics and the evolution of the galaxy are affected by the input supernova feedback energy E$_{\\rm SN}$, and we compare its properties with those of the Milky Way. Different values of E$_{\\rm SN}$ do not significantly affect the star formation history of the system, but the disc of cold gas gets thicker and more turbulent as feedback increases. Our main result is that, for the highest value of E$_{\\rm SN}$ considered, the galaxy shows a prominent layer of extra-planar cold (log(T)<4.3) gas extended up to a few kpc above the disc at column densities of $10^{19}$ cm$^{-2}$. The kinematics of this material is in agreement with that inferred for the HI halos of our Galaxy ...

  16. Radiation Heat Transfer in Particle-Laden Gaseous Flame: Flame Acceleration and Triggering Detonation

    E-Print Network [OSTI]

    Liberman, M A; Kiverin, A D

    2015-01-01T23:59:59.000Z

    In this study we examine influence of the radiation heat transfer on the combustion regimes in the mixture, formed by suspension of fine inert particles in hydrogen gas. The gaseous phase is assumed to be transparent for the thermal radiation, while the radiant heat absorbed by the particles is then lost by conduction to the surrounding gas. The particles and gas ahead of the flame is assumed to be heated by radiation from the original flame. It is shown that the maximum temperature increase due to the radiation preheating becomes larger for a flame with lower velocity. For a flame with small enough velocity temperature of the radiation preheating may exceed the crossover temperature, so that the radiation heat transfer may become a dominant mechanism of the flame propagation. In the case of non-uniform distribution of particles, the temperature gradient formed due to the radiation preheating can initiate either deflagration or detonation ahead of the original flame via the Zel'dovich's gradient mechanism. Th...

  17. Assessment and interpretation of cross- and down-hole seismograms at the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Staub, W.P.; Wang, J.C. (Oak Ridge National Lab., TN (United States)); Selfridge, R.J. (Automated Sciences Group, (United States))

    1991-09-01T23:59:59.000Z

    This paper is an assessment and interpretation of cross-and down-hole seismograms recorded at four sites in the vicinity of the Paducah Gaseous Diffusion Plant (PGDP). Arrival times of shear (S-) and compressional (P-) waves are recorded on these seismograms in milliseconds. Together with known distances between energy sources and seismometers lowered into boreholes, these arrival times are used to calculate S- and P-wave velocities in unconsolidated soils and sediments that overlie bedrock approximately 320 ft beneath PGDP. The soil columns are modified after an earlier draft by ERC Environmental and Energy Services Company (ERCE), 1990. In addition to S- and P- wave velocity estimates from this paper, the soil columns contain ERCE's lithologic and other geotechnical data for unconsolidated soils and sediments from the surface to bedrock. Soil columns for Sites 1 through 4 and a site location map are in Plates 1 through 5 of Appendix 6. The velocities in the four columns are input parameters for the SHAKE computer program, a nationally recognized computer model that simulates ground response of unconsolidated materials to earthquake generated seismic waves. The results of the SHAKE simulation are combined with predicted ground responses on rock foundations (caused by a given design earthquake) to predict ground responses of facilities with foundations placed on unconsolidated materials. 3 refs.

  18. Dynamical Decoupling of Nested Bars: Self-Gravitating Gaseous Nuclear Bars

    E-Print Network [OSTI]

    Peter Englmaier; Isaac Shlosman

    2004-10-11T23:59:59.000Z

    A substantial fraction of barred galaxies host additional nuclear bars which tumble with pattern speeds exceeding those of the large-scale (primary) stellar bars. We have investigated the mechanism of formation and dynamical decoupling in such nested bars which include gaseous (secondary) nuclear bars within the full size galactic disks, hosting a double inner Lindblad resonance. Becoming increasingly massive and self-gravitating, the nuclear bars lose internal (circulation) angular momentum to the primary bars and increase their strength. Developing chaos within these bars triggers a rapid gas collapse -- bar contraction. During this time period, the secondary bar pattern speed Omega_s~a^{-1}, where "a" stands for the bar size. As a result, Omega_s increases dramatically until a new equilibrium is reached (if at all), while the gas specific angular momentum decreases -- demonstrating the dynamical decoupling of nested bars. Viscosity, and therefore the gas presence, appears to be a necessary condition for the prograde decoupling of nested bars. This process maintains an inflow rate of ~1 M_o/yr over ~10^8 yrs across the central 200 pc and has important implications for fueling the nuclear starbursts and AGN.

  19. Oak Ridge Gaseous Diffusion Plant Biological Monitoring and Abatement Program for Mitchell Branch

    SciTech Connect (OSTI)

    Loar, J.M.; Adams, S.M.; Kszos, L.A.; Ryon, M.G.; Smith, J.G.; Southworth, G.R.; Stewart, A.J.

    1992-01-01T23:59:59.000Z

    A proposed Biological Monitoring and Abatement Program (BMAP) for the Oak Ridge Gaseous Diffusion Plant (ORGDP; currently the Oak Ridge K-25 Site) was prepared in December 1986, as required by the modified National Pollutant Discharge Elimination System (NPDES) permit that was issued on September 11, 1986. The effluent discharges to Mitchell Branch are complex, consisting of trace elements, organic chemicals, and radionuclides in addition to various conventional pollutants. Moreover, the composition of these effluent streams will be changing over time as various pollution abatement measures are implemented over the next several years. Although contaminant inputs to the stream originate primarily as point sources from existing plant operations, area sources, such as the classified burial grounds and the K-1407-C holding pond, can not be eliminated as potential sources of contaminants. The proposed BMAP consists of four tasks. These tasks include (1) ambient toxicity testing, (2) bioaccumulation studies, (3) biological indicator studies, and (4) ecological surveys of the benthic invertebrate and fish communities. BMAP will determine whether the effluent limits established for ORGDP protect the designated use of the receiving stream (Mitchell Branch) for growth and propagation of fish and aquatic life. Another objective of the program is to document the ecological effects resulting from various pollution abatement projects, such as the Central Neutralization Facility.

  20. Martin Marietta Paducah Gaseous Diffusion Plant comprehensive earthquake emergency management program

    SciTech Connect (OSTI)

    Not Available

    1990-02-28T23:59:59.000Z

    Recognizing the value of a proactive, integrated approach to earthquake preparedness planning, Martin Marietta Energy Systems, Inc. initiated a contract in June 1989 with Murray State University, Murray, Kentucky, to develop a comprehensive earthquake management program for their Gaseous Diffusion Plant in Paducah, Kentucky. The overall purpose of the program is to mitigate the loss of life and property in the event of a major destructive earthquake. The program includes four distinct (yet integrated) components: an emergency management plan, with emphasis on the catastrophic earthquake; an Emergency Operations Center Duty Roster Manual; an Integrated Automated Emergency Management Information System (IAEMIS); and a series of five training program modules. The PLAN itself is comprised of four separate volumes: Volume I -- Chapters 1--3; Volume II -- Chapters 4--6, Volume III -- Chapter 7, and Volume IV -- 23 Appendices. The EOC Manual (which includes 15 mutual aid agreements) is designated as Chapter 7 in the PLAN and is a stand alone'' document numbered as Volume III. This document, Volume I, provides an introduction, summary and recommendations, and the emergency operations center direction and control.

  1. Determination of operating limits for radionuclides for a proposed landfill at Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Wang, J.C.; Lee, D.W.; Ketelle, R.H.; Lee, R.R.; Kocher, D.C.

    1994-05-24T23:59:59.000Z

    The operating limits for radionuclides in sanitary and industrial wastes were determined for a proposed landfill at the Paducah Gaseous Diffusion Plant (PGDP), Kentucky. These limits, which may be very small but nonzero, are not mandated by law or regulation but are needed for rational operation. The approach was based on analyses of the potential contamination of groundwater at the plant boundary and the potential exposure to radioactivity of an intruder at the landfill after closure. The groundwater analysis includes (1) a source model describing the disposal of waste and the release of radionuclides from waste to the groundwater, (2) site-specific groundwater flow and contaminant transport calculations, and (3) calculations of operating limits from the dose limit and conversion factors. The intruder analysis includes pathways through ingestion of contaminated vegetables and soil, external exposure to contaminated soil, and inhalation of suspended activity from contaminated soil particles. In both analyses, a limit on annual effective dose equivalent of 4 mrem (0.04 mSv) was adopted. The intended application of the results is to refine the radiological monitoring standards employed by the PGDP Health Physics personnel to determine what constitutes radioactive wastes, with concurrence of the Commonwealth of Kentucky.

  2. Determination of operating limits for radionuclides for a proposed landfill at Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Wang, J.C.; Lee, D.W.; Ketelle, R.H.; Lee, R.R.; Kocher, D.C. [Oak Ridge National Lab., TN (United States)

    1994-12-31T23:59:59.000Z

    The operating limits for radionuclides in sanitary and industrial wastes were determined for a proposed landfill at the Paducah Gaseous Diffusion Plant (PGDP) in Paducah, Kentucky. These limits, which may be very small but nonzero, are not mandated by law or regulation but are needed for rational operation. The primary advantages of establishing such operating limits include (a) technically defensible screening criteria for landfill-destined solid wastes, (b) significant reductions in the required capacity of radioactive waste storage and disposal facilities, and (c) reductions in costs associated with storage and disposal of radioactive materials. The approach was based on analyses of potential contamination of groundwater at the plant boundary and the potential exposure to radioactivity of an intruder at the landfill after closure. The groundwater analysis includes (a) a source model describing the disposal of waste and the release of radionuclides from waste to groundwater, (b) site-specific groundwater flow and contaminant transport calculations, and (c) calculations of operating limits from the dose objective and conversion factors. The intruder analysis includes pathways through ingestion of contaminated vegetables and soil, external exposure to contaminated soil, and inhalation of suspended activity from contaminated soil particles. In both analyses, a limit on annual effective dose equivalent of 4 mrem (0.04 mSv) was adopted.

  3. Report on the biological monitoring program at Paducah Gaseous Diffusion Plant December 1993 to December 1994

    SciTech Connect (OSTI)

    Kszos, L.A. [ed.

    1996-05-01T23:59:59.000Z

    On September 24, 1987, the Commonwealth of Kentucky Natural Resources and Environmental Protection Cabinet issued an Agreed Order that required the development of a Biological Monitoring Program (BMP) for the Paducah Gaseous Diffusion Plant (PGDP). The PGDP BMP was implemented in 1987 by the University of Kentucky. Research staff of the Environmental Sciences Division (ESD) at Oak Ridge National Laboratory (ORNL) served as reviewers and advisers to the University of Kentucky. Beginning in fall 1991, ESD added data collection and report preparation to its responsibilities for the PGDP BMP. The goals of BMP are to (1) demonstrate that the effluent limitations established for PGDP protect and maintain the use of Little Bayou and Big Bayou creeks for growth and propagation of fish and other aquatic life, (2) characterize potential environmental impacts, (3) document the effects of pollution abatement facilities on stream biota, and (4) recommend any program improvements that would increase effluent treatability. In September 1992, a renewed Kentucky Pollutant Discharge Elimination System (KPDES) permit was issued to PGDP. The BMP for PGDP consists of three major tasks: (1) effluent and ambient toxicity monitoring, (2) bioaccumulation studies, and (3) ecological surveys of stream communities (i.e., benthic macroinvertebrates and fish). This report includes ESD activities occurring from December 1993 to December 1994, although activities conducted outside this time period are included as appropriate.

  4. Martin Marietta Paducah Gaseous Diffusion Plant comprehensive earthquake emergency management program

    SciTech Connect (OSTI)

    Not Available

    1990-02-28T23:59:59.000Z

    Recognizing the value of a proactive, integrated approach to earthquake preparedness planning, Martin Marietta Energy Systems, Inc. initiated a contract in June 1989 with Murray State University, Murray, Kentucky, to develop a comprehensive earthquake management program for their Gaseous Diffusion Plant in Paducah, Kentucky (PGDP -- Subcontract No. 19P-JV649V). The overall purpose of the program is to mitigate the loss of life and property in the event of a major destructive earthquake. The program includes four distinct (yet integrated) components: an emergency management plan, with emphasis on the catastrophic earthquake; an Emergency Operations Center Duty Roster Manual; an Integrated Automated Emergency Management Information System (IAEMIS); and a series of five training program modules. The PLAN itself is comprised of four separate volumes: Volume I -- Chapters 1--3; Volume II -- Chapters 4--6, Volume III -- Chapter 7, and Volume IV -- 23 Appendices. The EOC Manual (which includes 15 mutual aid agreements) is designated as Chapter 7 in the PLAN and is a stand alone'' document numbered as Volume III. This document, Volume II, discusses methodology, engineering and environmental analyses, and operational procedures.

  5. Report on the biological monitoring program at Paducah Gaseous Diffusion Plant, January--December 1996

    SciTech Connect (OSTI)

    Kszos, L.A. [ed.; Konetsky, B.K.; Peterson, M.J.; Petrie, R.B.; Ryon, M.G.; Smith, J.G.; Southworth, G.R.

    1997-06-01T23:59:59.000Z

    On September 24, 1987, the Commonwealth of Kentucky Natural Resources and Environmental Protection Cabinet issued an Agreed Order that required the development of a Biological Monitoring Program (BMP) for the Paducah Gaseous diffusion Plant (PGDP). The PGDP BMP was conducted by the University of Kentucky Between 1987 and 1992 and by staff of the Environmental Sciences Division (ESD) at Oak Ridge National Laboratory (ORNL) from 1991 to present. The goals of BMP are to (1) demonstrate that the effluent limitations established for PGDP protect and maintain the use of Little Bayou and Big Bayou creeks for growth and propagation of fish and other aquatic life, (2) characterize potential environmental impacts, and (3) document the effects of pollution abatement facilities on stream. The BMP for PGDP consists of three major tasks: (1) effluent toxicity monitoring, (2) bioaccumulation studies, and (3) ecological surveys of stream communities (i.e., benthic macroinvertebrates and fish). This report focuses on ESD activities occurring from January 1996 to December 1996, although activities conducted outside this time period are included as appropriate.

  6. Seismic hazard evaluation for the Paducah Gaseous Diffusion Plant, Paducah, Kentucky

    SciTech Connect (OSTI)

    Not Available

    1991-07-01T23:59:59.000Z

    The study presents the results of an investigation of seismic hazard at the site of the Paducah Gaseous Diffusion Plant. Paducah is located near the northern end of the Reelfoot Rift -- a large feature of the earth's crust that is believed to be associated with the New Madrid earthquakes of 1811 and 1812. Results from three separate seismic hazard analyses are presented here. The EPRI/SOG analysis uses the input data and methodology developed by the Electric Power Research Institute, under the sponsorship of several electric utilities, for the evaluation of seismic hazard in the central and eastern United States. Section 2 of this report documents the application of the EPRI/SOG methodology to the Paducah site (for both rock and soil conditions). The LLNL analysis uses the input data and methodology developed by the Lawrence Livermore National Laboratory for the Nuclear Regulatory Commission. This analysis was performed by LLNL and results were transmitted to us. Section 3 of this report contains a summary of LLNL inputs and results (for both rock and soil conditions, and considering 4 and 5 LLNL ground motion experts). 29 refs., 118 figs., 24 tabs.

  7. Operating limit study for the proposed solid waste landfill at Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Lee, D.W.; Wang, J.C.; Kocher, D.C.

    1995-06-01T23:59:59.000Z

    A proposed solid waste landfill at Paducah Gaseous Diffusion Plant (PGDP) would accept wastes generated during normal operations that are identified as non-radioactive. These wastes may include small amounts of radioactive material from incidental contamination during plant operations. A site-specific analysis of the new solid waste landfill is presented to determine a proposed operating limit that will allow for waste disposal operations to occur such that protection of public health and the environment from the presence of incidentally contaminated waste materials can be assured. Performance objectives for disposal were defined from existing regulatory guidance to establish reasonable dose limits for protection of public health and the environment. Waste concentration limits were determined consistent with these performance objectives for the protection of off-site individuals and inadvertent intruders who might be directly exposed to disposed wastes. Exposures of off-site individuals were estimated using a conservative, site-specific model of the groundwater transport of contamination from the wastes. Direct intrusion was analyzed using an agricultural homesteader scenario. The most limiting concentrations from direct intrusion or groundwater transport were used to establish the concentration limits for radionuclides likely to be present in PGDP wastes.

  8. Report on the biological monitoring program at Paducah Gaseous Diffusion Plant, January--December 1997

    SciTech Connect (OSTI)

    Kszos, L.A.; Peterson, M.J.; Ryon, M.G.; Smith, J.G.; Southworth, G.R.

    1998-03-01T23:59:59.000Z

    On September 24, 1987, the Commonwealth of Kentucky Natural Resources and Environmental Protection Cabinet issued an Agreed Order that required the development of a Biological Monitoring Program (BMP) for the Paducah Gaseous Diffusion Plant (PGDP). A plan for the biological monitoring of the receiving streams was implemented in 1987 and consisted of ecological surveys, toxicity monitoring of effluents and receiving streams, evaluation of bioaccumulation of trace contaminants in biota, and supplemental chemical characterization of effluents. Beginning in fall 1991, the Environmental Sciences Division (ESD) at Oak Ridge National Laboratory added data collection and report preparation to its responsibilities for the PGDP BMP. The BMP has been continued because it has proven to be extremely valuable in (1) identifying those effluents with the potential for adversely affecting instream fauna, (2) assessing the ecological health of receiving streams, and (3) guiding plans for remediation and protecting human health. The BMP for PGDP consists of three major tasks: (1) effluent toxicity monitoring, (2) bioaccumulation studies, and (3) ecological surveys of benthic macroinvertebrate communities and fish. With the exception of the benthic macroinvertebrate community surveys, this report focuses on activities from January to December 1997.

  9. Martin Marietta Paducah Gaseous Diffusion Plant comprehensive earthquake emergency management program

    SciTech Connect (OSTI)

    Not Available

    1990-02-28T23:59:59.000Z

    Recognizing the value of a proactive, integrated approach to earthquake preparedness planning, Martin Marietta Energy Systems, Inc, initiated a contract in June 1989 with Murray State University, Murray, Kentucky, to develop a comprehensive earthquake management program for their Gaseous Diffusion Plant in Paducah, Kentucky (PGDP--Subcontract No. 19P-JV649V). The overall purpose of the program is to mitigate the loss of life and property in the event of a major destructive earthquake. The program includes four distinct (yet integrated) components: (1) an emergency management plan, with emphasis on the catas trophic earthquake, (2) an Emergency Operations Center Duty Roster Manual, (3) an Integrated Automated Emergency Management Information System (IAEMIS), and (4) a series of five training program modules. The PLAN itself is comprised of four separate volumes: Volume I--Chapters 1--3; Volume II--Chapters 4--6, Volume III--Chapter 7, and Volume IV--23 Appendices. The EOC Manual (which includes 15 mutual aid agreements) is designated as Chapter 7 in the PLAN and is a stand alone'' document numbered as Volume III. This document, Volume IV contains the appendices to this report.

  10. Martin Marietta Paducah Gaseous Diffusion Plant comprehensive earthquake emergency management program

    SciTech Connect (OSTI)

    Not Available

    1990-02-28T23:59:59.000Z

    Recognizing the value of a proactive, integrated approach to earthquake preparedness planning, Martin Marietta Energy Systems, Inc. initiated a contract in June 1989 with Murray State University, Murray, Kentucky, to develop a comprehensive earthquake management program for their Gaseous Diffusion Plant in Paducah, Kentucky (PGDP -- Subcontract No. 19P-JV649V). The overall purpose of the program is to mitigate the loss of life and property in the event of a major destructive earthquake. The program includes four distinct (yet integrated) components: (1) an emergency management plan with emphasis on the catas trophic earthquake; (2) an Emergency Operations Center Duty Roster Manual; (3) an Integrated Automated Emergency Management Information System (IAEMIS); and (4) a series of five training program modules. The PLAN itself is comprised of four separate volumes: Volume I -- Chapters 1--3; Volume II -- Chapters 4--6; Volume III -- Chapter 7; and Volume IV -- 23 Appendices. The EOC Manual (which includes 15 mutual aid agreements) is designated as Chapter 7 in the PLAN and is this document numbered as Volume III.

  11. Paducah Gaseous Diffusion Plant proposed pilot pump-and-treat project. Final report

    SciTech Connect (OSTI)

    Bodenstein, G.W.; Bonczek, R.R.; Early, T.O.; Huff, D.D.; Jones, K.S.; Nickelson, M.D.; Rightmire, C.T.

    1994-01-01T23:59:59.000Z

    On March 23, 1992, R.C. Sleeman of the Department of Energy, Oak Ridge Operations Office requested that a Groundwater Corrective Actions Team be assembled to evaluate the technical merit of and the need to implement a proposed groundwater pump-and-treat demonstration project for the Northwest contaminant plume at the Paducah Gaseous Diffusion Plant. In addition to other suggestions, the Team recommended that further characterization data be obtained for the plume. In the Fall of 1993 additional, temporary well points were installed so that groundwater samples from the shallow groundwater system and the Regional Gravel Aquifer (RGA) could be obtained to provide a three-dimensional view of groundwater contamination in the region of the plume. The results indicate that pure-phase DNAPL (trichloroethylene [TCE]) probably are present in the source area of the plume and extend in depth to the base of the RGA. Because the DNAPL likely will represent a source of a dissolved phase plume for decades it is essential that source containment take place. The Team recommends that although effective hydraulic containment can be achieved, other alternatives should be considered. For example, recent advances in emplacing low permeability barrier walls to depths of 100 to 150 ft make it possible to consider encirclement of the source of the Northwest plume.

  12. Ices in the Galactic Centre : solid ice and gaseous CO in the central parsec

    E-Print Network [OSTI]

    Moultaka, Jihane; Sabha, Nadeen

    2015-01-01T23:59:59.000Z

    For the past few years, we have observed the central half parsec of our Galaxy in the mid-infrared from 2.8 to 5.1 micron. Our aim is to improve our understanding of the direct environment of SgrA*, the supermassive blackhole at the centre of the Milky Way. This work is described in the present paper and by Moultaka et al. 2015 (submitted). Here, we focus on the study of the spatial distribution of the 12CO ice and gas-phase absorptions. We observed the central half parsec with ISAAC spectrograph located at the UT3/VLT ESO telescope in Chile. The slit was placed along 22 positions arranged parallel to each other to map the region. We built the first data cube in this wavelength range covering the central half parsec. The wavelength interval of the used M-band filter ranges from 4.6 to 5.1 micron. It hosts the P- and R- branches of the ro-vibrational transitions of the gaseous 12CO and 13CO, as well as the absorption band attributed to the 12CO ice at 4.675 micron. Using two calibrators, we could disentangle t...

  13. Infrared absorption strengths of potential gaseous diffusion plant coolants and related reaction products

    SciTech Connect (OSTI)

    Trowbridge, L.D.; Angel, E.C.

    1993-05-01T23:59:59.000Z

    The DOE gaseous diffusion plant complex makes extensive use of CFC-114 as a primary coolant. As this material is scheduled for production curtailment within the next few years, a search for substitutes is underway, and apparently workable alternatives have been found and are under testing. The presently favored substitutes, FC-c3l8 and FC-3110, satisfy ozone depletion and operational chemical compatibility concerns, but will be long-lived greenhouse gases, and thus may be regulated on that basis in the future. A further search is therefore underway for compounds with shorter atmospheric lifetimes which could otherwise satisfy operational physical and chemical requirements. A number of such candidates are in the process of being screened for chemical compatibility in a fluorinating environment. This document presents infrared spectral data developed and used in that study for candidates recently examined, and also for many of their fluorination reaction products. The data include gas-phase infrared spectra, quantitative peak intensities as a function of partial pressure, and integrated absorbance strength in the IR-transparent atmospheric window of interest to global warming modeling. Combining this last property with literature or estimated atmospheric lifetimes, rough estimates of global warming potential for these compounds are also presented.

  14. PP-waves with Torsion - a Metric-affine Model for the Massless Neutrino

    E-Print Network [OSTI]

    Vedad Pasic; Elvis Barakovic

    2014-09-03T23:59:59.000Z

    In this paper we deal with quadratic metric-affine gravity, which we briefly introduce, explain and give historical and physical reasons for using this particular theory of gravity. Further, we introduce a generalisation of well known spacetimes, namely pp-waves. A classical pp-wave is a 4-dimensional Lorentzian spacetime, which admits a nonvanishing parallel spinor field; here the connection is assumed to be Levi-Civita. This definition was generalised in our previous work to metric compatible spacetimes with torsion and used to construct new explicit vacuum solutions of quadratic metric-affine gravity, namely generalised pp-waves of parallel Ricci curvature. The physical interpretation of these solutions we propose in this article is that they represent a conformally invariant metric-affine model for a massless elementary particle. We give a comparison with the classical model describing the interaction of gravitational and massless neutrino fields, namely Einstein-Weyl theory and construct pp-wave type solutions of this theory. We point out that generalised pp-waves of parallel Ricci curvature are very similar to pp-wave type solutions of the Einstein-Weyl model and therefore propose that our generalised pp-waves of parallel Ricci curvature represent a metric-affine model for the massless neutrino.

  15. How to count efficiently all affine roots of a polynomial system \\Lambda

    E-Print Network [OSTI]

    Verschelde, Jan

    on the lifting of the artificial origins exist and can be derived dynamically, as described in sections 4, 5How to count efficiently all affine roots of a polynomial system \\Lambda Ioannis Z. Emiris y Jan system; how­ ever, it has so far mostly dealt with roots having nonzero coordinates. We shift attention

  16. High-Affinity DNA Base Analogs as Supramolecular, Nanoscale Promoters of Macroscopic Adhesion

    E-Print Network [OSTI]

    Sottos, Nancy R.

    High-Affinity DNA Base Analogs as Supramolecular, Nanoscale Promoters of Macroscopic Adhesion Cyrus and Engineering, § Beckman Institute for Advanced Science and Technology, and Department of Materials Science and manufac- tured coatings and composites. Supramolecular interactions are often implicated in various

  17. Optimal control of affine connection control systems from the point of view of Lie algebroids

    E-Print Network [OSTI]

    L. Abrunheiro; M. Camarinha

    2014-06-13T23:59:59.000Z

    The purpose of this paper is to use the framework of Lie algebroids to study optimal control problems for affine connection control systems on Lie groups. In this context, the equations for critical trajectories of the problem are geometrically characterized as a Hamiltonian vector field.

  18. A numeric solution for metric-affine gravity and Einstein's gravitational theory with Proca matter

    E-Print Network [OSTI]

    Marc Toussaint

    1999-10-12T23:59:59.000Z

    A special case of metric-affine gauge theory of gravity (MAG) is equivalent to general relativity with Proca matter as source. We study in detail a corresponding numeric solution of the Reissner-Nordstr"om type. It is static, spherically symmetric, and of electric type. In particular, this solution has no horizon, so it has a naked singularity as its origin.

  19. On the solutions of the Cartan equation in Metric Affine Gravity

    E-Print Network [OSTI]

    Roberto Mignani; Roberto Scipioni

    2000-09-28T23:59:59.000Z

    In the Tucker-Wang approach to Metric Affine gravity we review some particular solutions of the Cartan equation for the non-riemannian part of the connection. As application we show how a quite general non Riemannian model gives a Proca type equation for the trace of the nonmetricity 1-forms Q.

  20. Calculations of the binding affinities of protein-protein complexes with the fast multipole method

    E-Print Network [OSTI]

    Song, Xueyu

    Calculations of the binding affinities of protein-protein complexes with the fast multipole method the boundary element method in combination with the fast multipole method. The residue level model with the fast multipole method allows us to efficiently investigate how the mutations on the active site

  1. A numerical framework for optimal control of switched affine systems with state

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A numerical framework for optimal control of switched affine systems with state constraint Pierre optimal control, switched systems, complementarity systems, numerical method 1. INTRODUCTION Most of the results related to the optimal control of hybrid systems deal with subsystems sharing zero as common

  2. A Bayesian Approach To Affine Transformation Resistant Image and Video Watermarking

    E-Print Network [OSTI]

    Genève, Université de

    A Bayesian Approach To Affine Transformation Resistant Image and Video Watermarking GabriellaGabriela.Csurka,Frederic.Deguillaume,Thierry.Pung@cui.unige.ch http://cuiwww.unige.ch/¸vision 2 Siemens Corporate Research, 755 College Road East, Princeton, NJ 08540, US oruanaidh@scr.siemens.com Abstract. This paper proposes a new approach for assessing the pres

  3. Affinely-rigid body and oscillatory dynamical models on GL(2,R)

    E-Print Network [OSTI]

    Agnieszka Martens; Jan J. S?awianowski

    2010-11-23T23:59:59.000Z

    Discussed is a model of the two-dimensional affinely-rigid body with the double dynamical isotropy. We investigate the systems with potential energies for which the variables can be separated. The special stress is laid on the model of the harmonic oscillator potential and certain anharmonic alternatives. Some explicit solutions are found on the classical, quasiclassical (Bohr-Sommerfeld) and quantum level.

  4. A self-consistent solution in affine space with scalar field

    E-Print Network [OSTI]

    V. Dorofeev

    2006-03-29T23:59:59.000Z

    Conformal connection of scalar field is shown to produce possible non-metricity in affine connection spaces. In case of self-consistent solution the non-metricity is a correction to background Riemannian structure with respect to gravitational constant and its magnitude may be essential in the early Universe.

  5. A Compiler Framework for Optimization of Affine Loop Nests for General Purpose Computations on GPUs

    E-Print Network [OSTI]

    Ramanujam, J. "Ram"

    ]. Until very recently, GPGPU computations were performed by transforming matrix operations. Although the polyhedral model of dependence abstraction and program transformation is much more powerfulA Compiler Framework for Optimization of Affine Loop Nests for General Purpose Computations on GPUs

  6. affinity brain membrane-binding: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    affinity brain membrane-binding First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Membrane Binding of...

  7. A fossil primate of uncertain affinities from the earliest late Eocene of Egypt

    E-Print Network [OSTI]

    Boyer, Doug M.

    A fossil primate of uncertain affinities from the earliest late Eocene of Egypt Erik R. Seifferta,1- mate from the earliest late Eocene (37 Ma) of northern Egypt, Nos- mipsaenigmaticus, whosephylogenetic of fossil primates from the Eocene of Algeria (1) and Egypt (2­4), Africa's role in the early evolution

  8. Pleba?ski-Demia?ski-like solutions in metric-affine gravity

    E-Print Network [OSTI]

    A. Garcia; F. W. Hehl; C. Laemmerzahl; A. Macias; J. Soccorro

    1998-03-03T23:59:59.000Z

    We consider a (non--Riemannian) metric--affine gravity theory, in particular its nonmetricity--torsion sector ``isomorphic'' to the Einstein--Maxwell theory. We map certain Einstein--Maxwell electrovacuum solutions to it, namely the Pleba\\'nski--Demia\\'nski class of Petrov type D metrics.

  9. Nonexistent electron affinity of OCS and the stabilization of carbonyl sulfide anions by gas phase hydration

    E-Print Network [OSTI]

    Sanov, Andrei

    Nonexistent electron affinity of OCS and the stabilization of carbonyl sulfide anions by gas phase hydration Eric Surber, S. P. Ananthavel, and Andrei Sanova) Department of Chemistry, University of Arizona the abundance of the hydrated anions is attributed to the stabilizing effect of hydration. These conclusions

  10. Summary and Outlook of the International Workshop on Aging Phenomena in Gaseous Detectors (DESY, Hamburg, October, 2001)

    E-Print Network [OSTI]

    M. Titov; M. Hohlmann; C. Padilla; N. Tesch

    2002-04-04T23:59:59.000Z

    High Energy Physics experiments are currently entering a new era which requires the operation of gaseous particle detectors at unprecedented high rates and integrated particle fluxes. Full functionality of such detectors over the lifetime of an experiment in a harsh radiation environment is of prime concern to the involved experimenters. New classes of gaseous detectors such as large-scale straw-type detectors, Micro-pattern Gas Detectors and related detector types with their own specific aging effects have evolved since the first workshop on wire chamber aging was held at LBL, Berkeley in 1986. In light of these developments and as detector aging is a notoriously complex field, the goal of the workshop was to provide a forum for interested experimentalists to review the progress in understanding of aging effects and to exchange recent experiences. A brief summary of the main results and experiences reported at the 2001 workshop is presented, with the goal of providing a systematic review of aging effects in state-of-the-art and future gaseous detectors.

  11. The Central Kiloparsec of Seyfert and Inactive Host Galaxies: a Comparison of Two-Dimensional Stellar and Gaseous Kinematics

    E-Print Network [OSTI]

    Gaelle Dumas; Carole Mundell; Eric Emsellem; Neil Nagar

    2007-05-29T23:59:59.000Z

    We investigate the properties of the two-dimensional distribution and kinematics of ionised gas and stars in the central kiloparsecs of a matched sample of nearby active (Seyfert) and inactive galaxies, using the SAURON Integral Field Unit on the William Herschel Telescope. The ionised gas distributions show a range of low excitation regions such as star formation rings in Seyferts and inactive galaxies, and high excitation regions related to photoionisation by the AGN. The stellar kinematics of all galaxies in the sample show regular rotation patterns typical of disc-like systems, with kinematic axes which are well aligned with those derived from the outer photometry and which provide a reliable representation of the galactic line of nodes. After removal of the non-gravitational components due to e.g. AGN-driven outflows, the ionised gas kinematics in both the Seyfert and inactive galaxies are also dominated by rotation with global alignment between stars and gas in most galaxies. This result is consistent with previous findings from photometric studies that the large-scale light distribution of Seyfert hosts are similar to inactive hosts. However, fully exploiting the two-dimensional nature of our spectroscopic data, deviations from axisymmetric rotation in the gaseous velocity fields are identified that suggest the gaseous kinematics are more disturbed at small radii in the Seyfert galaxies compared with the inactive galaxies, providing a tentative link between nuclear gaseous streaming and nuclear activity.

  12. THE ELECTRON AFFINITY OF UO E.B. Rudnyi, E.A. Kaibicheva, L.N. Sidorov

    E-Print Network [OSTI]

    Rudnyi, Evgenii B.

    THE ELECTRON AFFINITY OF UO 3 * E.B. Rudnyi, E.A. Kaibicheva, L.N. Sidorov Department of Chemistry keywords - negative ions, uranium oxide, electron affinity, ion - molecule equilibria, high temperature stronger than fluorides. The uranium oxide lies aside from other molecules in -1 table 1. High electron

  13. Method for selectively removing fluorine and fluorine-containing contaminants from gaseous UF/sub 6/. [ClF/sub 3/

    DOE Patents [OSTI]

    Jones, R.L.; Otey, M.G.; Perkins, R.W.

    1980-11-24T23:59:59.000Z

    This invention is a method for effecting preferential removal and immobilization of certain gaseous contaminants from gaseous UF/sub 6/. The contaminants include fluorine and fluorides which are more reactive with CaCO/sub 3/ than is UF/sub 6/. The method comprises contacting the contaminant-carrying UF/sub 6/ with particulate CaCO/sub 3/ at a temperature effecting reaction of the contaminant and the CaCO/sub 3/.

  14. A GENERAL CIRCULATION MODEL FOR GASEOUS EXOPLANETS WITH DOUBLE-GRAY RADIATIVE TRANSFER

    SciTech Connect (OSTI)

    Rauscher, Emily [Lunar and Planetary Laboratory, University of Arizona, 1629 East University Boulevard, Tucson, AZ 85721-0092 (United States); Menou, Kristen [Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027 (United States)

    2012-05-10T23:59:59.000Z

    We present a new version of our code for modeling the atmospheric circulation on gaseous exoplanets, now employing a 'double-gray' radiative transfer scheme, which self-consistently solves for fluxes and heating throughout the atmosphere, including the emerging (observable) infrared flux. We separate the radiation into infrared and optical components, each with its own absorption coefficient, and solve standard two-stream radiative transfer equations. We use a constant optical absorption coefficient, while the infrared coefficient can scale as a power law with pressure; however, for simplicity, the results shown in this paper use a constant infrared coefficient. Here we describe our new code in detail and demonstrate its utility by presenting a generic hot Jupiter model. We discuss issues related to modeling the deepest pressures of the atmosphere and describe our use of the diffusion approximation for radiative fluxes at high optical depths. In addition, we present new models using a simple form for magnetic drag on the atmosphere. We calculate emitted thermal phase curves and find that our drag-free model has the brightest region of the atmosphere offset by {approx}12 Degree-Sign from the substellar point and a minimum flux that is 17% of the maximum, while the model with the strongest magnetic drag has an offset of only {approx}2 Degree-Sign and a ratio of 13%. Finally, we calculate rates of numerical loss of kinetic energy at {approx}15% for every model except for our strong-drag model, where there is no measurable loss; we speculate that this is due to the much decreased wind speeds in that model.

  15. Feedback from galactic stellar bulges and hot gaseous haloes of galaxies

    E-Print Network [OSTI]

    Shikui Tang; Q. Daniel Wang; Yu Lu; H. J. Mo

    2008-10-30T23:59:59.000Z

    We demonstrate that the feedback from stellar bulges can play an essential role in shaping the halo gas of galaxies with substantial bulge components by conducting 1-D hydrodynamical simulations. The feedback model we consider consists of two distinct phases: 1) an early starburst during the bulge formation and 2) a subsequent long-lasting mass and energy injection from stellar winds of low-mass stars and Type Ia SNe. An energetic outward blastwave is initiated by the starburst and is maintained and enhanced by the long-lasting stellar feedback. For a MW-like galactic bulge, this blastwave sweeps up the halo gas in the proto-galaxy and heats up the surrounding medium to a scale much beyond the virial radius of the halo, thus the accretion of the halo hot gas can be completely stopped. In addition, the long-lasting feedback in the later phase powers a galactic bulge wind that is reverse-shocked at a large radius in the presence of surrounding intergalactic medium and hence maintains a hot gaseous halo. As the mass and energy injection decreases with time, the feedback evolves to a subsonic and quasi-stable outflow, which is enough to prevent halo gas from cooling. The two phases of the feedback thus re-enforce each-other's impact on the gas dynamics. The simulation results demonstrate that the stellar bulge feedback may provide a plausible solution to the long-standing problems in understanding the MW type galaxies, such as the "missing stellar feedback" problem and the "over-cooling" problem. The simulations also show that the properties of the hot gas in the subsonic outflow state depend sensitively on the environment and the formation history of the bulge. This dependence and variance may explain the large dispersion in the X-ray to B-band luminosity ratio of the low $L_X/L_B$ Es.

  16. Modifying woody plants for efficient conversion to liquid and gaseous fuels

    SciTech Connect (OSTI)

    Dinus, R.J.; Dimmel, D.R.; Feirer, R.P.; Johnson, M.A.; Malcolm, E.W. (Institute of Paper Science and Technology, Atlanta, GA (USA))

    1990-07-01T23:59:59.000Z

    The Short Rotation Woody Crop Program (SRWCP), Department of Energy, is developing woody plant species as sources of renewable energy. Much progress has been made in identifying useful species, and testing site adaptability, stand densities, coppicing abilities, rotation lengths, and harvesting systems. Conventional plant breeding and intensive cultural practices have been used to increase above-ground biomass yields. Given these and foreseeable accomplishments, program leaders are now shifting attention to prospects for altering biomass physical and chemical characteristics, and to ways for improving the efficiency with which biomass can be converted to gaseous and liquid fuels. This report provides a review and synthesis of literature concerning the quantity and quality of such characteristics and constituents, and opportunities for manipulating them via conventional selection and breeding and/or molecular biology. Species now used by SRWCP are emphasized, with supporting information drawn from others as needed. Little information was found on silver maple (Acer saccharinum), but general comparisons (Isenberg 1981) suggest composition and behavior similar to those of the other species. Where possible, conclusions concerning means for and feasibility of manipulation are given, along with expected impacts on conversion efficiency. Information is also provided on relationships to other traits, genotype X environment interactions, and potential trade-offs or limitations. Biomass productivity per se is not addressed, except in terms of effects that may by caused by changes in constituent quality and/or quantity. Such effects are noted to the extent they are known or can be estimated. Likely impacts of changes, however effected, on suitability or other uses, e.g., pulp and paper manufacture, are notes. 311 refs., 4 figs., 9 tabs.

  17. TIME-DEPENDENT PHOTOIONIZATION OF GASEOUS NEBULAE: THE PURE HYDROGEN CASE

    SciTech Connect (OSTI)

    Garcia, J.; Elhoussieny, E. E.; Bautista, M. A. [Department of Physics, Western Michigan University, Kalamazoo, MI 49008 (United States); Kallman, T. R., E-mail: javier@head.cfa.harvard.edu, E-mail: manuel.bautista@wmich.edu, E-mail: ehab.elhoussieny@wmich.edu, E-mail: timothy.r.kallman@nasa.gov [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

    2013-09-20T23:59:59.000Z

    We study the problem of time-dependent photoionization of low density gaseous nebulae subjected to sudden changes in the intensity of ionizing radiation. To this end, we write a computer code that solves the full time-dependent energy balance, ionization balance, and radiation transfer equations in a self-consistent fashion for a simplified pure hydrogen case. It is shown that changes in the ionizing radiation yield ionization/thermal fronts that propagate through the cloud, but the propagation times and response times to such fronts vary widely and nonlinearly from the illuminated face of the cloud to the ionization front (IF). IF/thermal fronts are often supersonic, and in slabs initially in pressure equilibrium such fronts yield large pressure imbalances that are likely to produce important dynamical effects in the cloud. Further, we studied the case of periodic variations in the ionizing flux. It is found that the physical conditions of the plasma have complex behaviors that differ from any steady-state solution. Moreover, even the time average of ionization and temperature is different from any steady-state case. This time average is characterized by overionization and a broader IF with respect to the steady-state solution for a mean value of the radiation flux. Around the time average of physical conditions there is a large dispersion in instantaneous conditions, particularly across the IF, which increases with the period of radiation flux variations. Moreover, the variations in physical conditions are asynchronous along the slab due to the combination of nonlinear propagation times for thermal fronts/IFs and equilibration times.

  18. Ground penetrating radar surveys over an alluvial DNAPL site, Paducah Gaseous Diffusion Plant, Kentucky

    SciTech Connect (OSTI)

    Carpenter, P.J. [Northern Illinois Univ., DeKalb, IL (United States). Dept. of Geology]|[Oak Ridge National Lab., TN (United States); Doll, W.E. [Oak Ridge National Lab., TN (United States); Phillips, B.E. [Paducah Gaseous Diffusion Plant, KY (United States)

    1994-09-01T23:59:59.000Z

    Ground penetrating radar (GPR) surveys were used to map shallow sands and gravels which are DNAPL migration pathways at the Paducah Gaseous Diffusion Plant in western Kentucky. The sands and gravels occur as paleochannel deposits, at depths of 17-25 ft, embedded in Pleistocene lacustrine clays. More than 30 GPR profiles were completed over the Drop Test Area (DTA) to map the top and base of the paleochannel deposits, and to assess their lateral continuity. A bistatic radar system was used with antenna frequencies of 25 and 50 MHz. An average velocity of 0.25 ft/ns for silty and clayey materials above the paleochannel deposits was established from radar walkaway tests, profiles over culverts of known depth, and comparison of radar sections with borings. In the south portion of the DTA, strong reflections corresponded to the water table at approximately 9-10 ft, the top of the paleochannel deposits at approximately 18 ft, and to gravel horizons within these deposits. The base of these deposits was not visible on the radar sections. Depth estimates for the top of the paleochannel deposits (from 50 records) were accurate to within 2 ft across the southern portion of the DTA. Continuity of these sands and gravels could not be assessed due to interference from air-wave reflections and lateral changes in signal penetration depth. However, the sands and gravels appear to extend across the entire southern portion of the DTA, at depths as shallow as 17 ft. Ringing, air-wave reflections and diffractions from powerlines, vehicles, well casings, and metal equipment severly degraded GPR profiles in the northern portion of the DTA; depths computed from reflection times (where visible) were accurate to within 4 ft in this area. The paleochannel deposits are deeper to the north and northeast where DNAPL has apparently pooled (DNAPL was not directly imaged by the GPR, however). Existing hydrogeological models of the DTA will be revised.

  19. Inorganic soil and groundwater chemistry near Paducah Gaseous Diffusion Plant, Paducah, Kentucky

    SciTech Connect (OSTI)

    Moore, G.K. [Tennessee Univ., Knoxville, TN (United States)

    1995-03-01T23:59:59.000Z

    Near-surface soils, boreholes, and sediments near the Paducah Gaseous Diffusion Plant (PGDP) were sampled in 1989-91 as were monitoring wells, TVA wells, and privately-owned wells. Most wells were sampled two or three times. The resulting chemical analyses have been published in previous reports and have been previously described (CH2M HILL 1991, 1992; Clausen et al. 1992). The two reports by CH2M HILL are controversial, however, because, the concentrations of some constituents were reported to exceed background levels or drinking water standards and because both on-site (within the perimeter fence at PGDP) and off-site pollution was reported to have occurred. The groundwater samples upon which these interpretations were based may not be representative, however. The CH2M HILL findings are discussed in the report. The purpose of this report is to characterize the inorganic chemistry of groundwater and soils near PGDP, using data from the CH2M HILL reports (1991, 1992), and to determine whether or not any contamination has occurred. The scope is limited to analysis and interpretation of data in the CH2M HILL reports because previous interpretations of these data may not be valid, because samples were collected in a relatively short period of time at several hundred locations, and because the chemical analyses are nearly complete. Recent water samples from the same wells were not considered because the characterization of inorganic chemistry for groundwater and soil requirements only one representative sample and an accurate analysis from each location.

  20. Proposed sale of radioactively contaminated nickel ingots located at the Paducah Gaseous Diffusion Plant, Paducah, Kentucky

    SciTech Connect (OSTI)

    NONE

    1995-10-01T23:59:59.000Z

    The U.S. Department of Energy (DOE) proposes to sell 8,500 radioactively contaminated nickel ingots (9.350 short tons), currently in open storage at the Paducah Gaseous Diffusion Plant (PGDP), to Scientific Ecology Group, Inc. (SEG) for decontamination and resale on the international market. SEG would take ownership of the ingots when they are loaded for transport by truck to its facility in Oak Ridge, Tennessee. SEG would receive approximately 200 short tons per month over approximately 48 months (an average of 180 ingots per month). The nickel decontamination process specified in SEG`s technical proposal is considered the best available technology and has been demonstrated in prototype at SEG. The resultant metal for resale would have contamination levels between 0.3 and 20 becquerel per gram (Bq/g). The health hazards associated with release of the decontaminated nickel are minimal. The activity concentration of the end product would be further reduced when the nickel is combined with other metals to make stainless steel. Low-level radioactive waste from the SEG decontamination process, estimated to be approximately 382 m{sup 3} (12,730 ft), would be shipped to a licensed commercial or DOE disposal facility. If the waste were packaged in 0.23 m{sup 3}-(7.5 ft{sup 3}-) capacity drums, approximately 1,500 to 1,900 drums would be transported over the 48-month contract period. Impacts from the construction of decontamination facilities and the selected site are minimal.

  1. Short-term effects of gaseous pollutants on cause-specific mortality in Wuhan, China

    SciTech Connect (OSTI)

    Zhengmin Qian; Qingci He; Hung-Mo Lin (and others) [Pennsylvania State College of Medicine, Hershey, PA (United States)

    2007-07-15T23:59:59.000Z

    This study was to determine the acute mortality effects of the gaseous pollutants in Wuhan, China a city with 7.5 million permanent residents during the period from 2000 to 2004. The major sources of air pollution in the city are motor vehicles and the use of coal for domestic cooking, heating, and industrial processes. In recent years, combustion of gas has been the most common method for domestic cooking. There is a large coal-combustion smelter in the district. There are approximately 4.5 million residents in Wuhan who live in the city's core area of 201 km{sup 2}, where air pollution levels are highest, and pollution ranges are wider than the majority of the cities in the published literature. We used the generalized additive model to analyze pollution, mortality, and covariate data. We found consistent NO{sub 2} effects on mortality with the strongest effects on the same day. Every 10-{mu}g/m{sup 3} increase in NO{sub 2} daily concentration on the same day was associated with an increase in nonaccidental cardiovascular, stroke, cardiac, respiratory, and cardiopulmonary mortality. These effects were stronger among the elderly than among the young. Formal examination of exposure-response curves suggests no-threshold linear relationships between daily mortality and NO{sub 2}, where the NO{sub 2} concentrations ranged from 19.2 to 127.4 {mu}g/m{sup 3}. SO{sub 2} and O{sub 3} were not associated with daily mortality. The exposure response relationships demonstrated heterogeneity, with some curves showing nonlinear relationships for SO{sub 2} and O{sub 3}. We conclude that there is consistent evidence of acute effects of NO{sub 2} on mortality and suggest that a no-threshold linear relationship exists between NO{sub 2} and mortality. 36 refs., 7 tabs.

  2. Neutral Current Coherent Cross Sections- Implications on Gaseous Spherical TPC's for detecting SN and Earth neutrinos

    E-Print Network [OSTI]

    J. D. Vergados

    2011-11-27T23:59:59.000Z

    The detection of galactic supernova (SN) neutrinos represents one of the future frontiers of low-energy neutrino physics and astrophysics. The neutron coherence of neutral currents (NC) allows quite large cross sections in the case of neutron rich targets, which can be exploited in detecting earth and sky neutrinos by measuring nuclear recoils. A core-collapse supernova represents one of the most powerful source of (anti)neutrinos in the Universe. These (NC) cross sections are not dependent on flavor conversions and, thus, their measurement will provide useful information about the neutrino source. In particular the case of SN they will yield information about the primary neutrino fluxes, i.e. before flavor conversions in neutrino sphere. The advantages of large gaseous low threshold and high resolution time projection counters (TPC) detectors TPC detectors will be discussed. These are especially promising since they are expected to be relatively cheap and easy to maintain. The information thus obtained can also be useful to other flavor sensitive detectors, e.g. the large liquid scintillation detectors like LENA. All together such detectors will provide invaluable information on the astrophysics of core-collapse explosion and on the neutrino mixing parameters. In particular, neutrino flavor transitions in SN envelope might be sensitive to the value of theta-{13} and to the unknown neutrino mass hierarchy. Till a real SN explosion is detected, one can use available earth neutrino sources with similar energy spectra to test the behavior of these detectors. Among them, the ORNL Neutron Spallation source (SNS) and boosted radioactive neutrino beams are good candidates.

  3. Modeling and analyses of postulated UF{sub 6} release accidents in gaseous diffusion plant

    SciTech Connect (OSTI)

    Kim, S.H.; Taleyarkhan, R.P.; Keith, K.D.; Schmidt, R.W. [Oak Ridge National Lab., TN (United States); Carter, J.C. [J.C. Carter Associates, Inc., Oak Ridge, TN (United States); Dyer, R.H. [Dyer Enterprises, Oak Ridge, TN (United States)

    1995-10-01T23:59:59.000Z

    Computer models have been developed to simulate the transient behavior of aerosols and vapors as a result of a postulated accident involving the release of uranium hexafluoride (UF{sub 6}) into the process building of a gaseous diffusion plant. UF{sub 6} undergoes an exothermic chemical reaction with moisture (H{sub 2}O) in the air to form hydrogen fluoride (HF) and radioactive uranyl fluoride (UO{sub 2}F{sub 2}). As part of a facility-wide safety evaluation, this study evaluated source terms consisting of UO{sub 2}F{sub 2} as well as HF during a postulated UF{sub 6} release accident in a process building. In the postulated accident scenario, {approximately}7900 kg (17,500 lb) of hot UF{sub 6} vapor is released over a 5 min period from the process piping into the atmosphere of a large process building. UO{sub 2}F{sub 2} mainly remains as airborne-solid particles (aerosols), and HF is in a vapor form. Some UO{sub 2}F{sub 2} aerosols are removed from the air flow due to gravitational settling. The HF and the remaining UO{sub 2}F{sub 2} are mixed with air and exhausted through the building ventilation system. The MELCOR computer code was selected for simulating aerosols and vapor transport in the process building. MELCOR model was first used to develop a single volume representation of a process building and its results were compared with those from past lumped parameter models specifically developed for studying UF{sub 6} release accidents. Preliminary results indicate that MELCOR predicted results (using a lumped formulation) are comparable with those from previously developed models.

  4. arXiv:math/0401317v2[math.RT]11Feb2004 Affine braids, Markov traces and the category O

    E-Print Network [OSTI]

    Ram, Arun

    alge- bras, cyclotomic Hecke algebras, affine BMW algebras, cyclotomic BMW algebras, Markov traces) We define the affine BMW algebra (Birman-Murakami-Wenzl) and show that it has a representation theory

  5. Method for resurrecting negative electron affinity photocathodes after exposure to an oxidizing gas

    DOE Patents [OSTI]

    Mulhollan, Gregory A; Bierman, John C

    2012-10-30T23:59:59.000Z

    A method by which negative electron affinity photocathodes (201), single crystal, amorphous, or otherwise ordered, can be made to recover their quantum yield following exposure to an oxidizing gas has been discovered. Conventional recovery methods employ the use of cesium as a positive acting agent (104). In the improved recovery method, an electron beam (205), sufficiently energetic to generate a secondary electron cloud (207), is applied to the photocathode in need of recovery. The energetic beam, through the high secondary electron yield of the negative electron affinity surface (203), creates sufficient numbers of low energy electrons which act on the reduced-yield surface so as to negate the effects of absorbed oxidizing atoms thereby recovering the quantum yield to a pre-decay value.

  6. Selective high-affinity polydentate ligands and methods of making such

    DOE Patents [OSTI]

    DeNardo, Sally; DeNardo, Gerald; Balhorn, Rodney

    2013-09-17T23:59:59.000Z

    This invention provides polydentate selective high affinity ligands (SHALs) that can be used in a variety of applications in a manner analogous to the use of antibodies. SHALs typically comprise a multiplicity of ligands that each binds different regions on the target molecule. The ligands are joined directly or through a linker thereby forming a polydentate moiety that typically binds the target molecule with high selectivity and avidity.

  7. New Derivation of Off-Shell Representations of the Multi-dimensional Affine and Virasoro Algebras

    E-Print Network [OSTI]

    T. A. Larsson

    2015-01-19T23:59:59.000Z

    Algebras of currents and diffeomorphisms in arbitrary dimension have extensions which generalize the affine and Virasoro algebras on the circle. A large class of off-shell representations was discovered in Comm. Math. Phys. 214 (2000) 469--491. That paper is not so accessible due to a slightly non-standard normal ordering formalism and cumbersome $p$-jet calculations. The purpose of the present paper is to simplify the derivation using standard OPE methods and a more field-like formalism.

  8. Fusion Rules for Affine sl(2|1;C) at Fractional Level k=-1/2

    E-Print Network [OSTI]

    Gavin Johnstone

    2001-06-05T23:59:59.000Z

    We calculate fusion rules for the admissible representations of the affine superalgebra sl(2|1;C) at fractional level k=-1/2 in the Ramond sector. By representing 3-point correlation functions involving a singular vector as the action of differential operators on the sl(2|1;C) invariant 3-point function, we obtain conditions on permitted quantum numbers involved. We find that in this case the primary fields close under fusion.

  9. Molecular Basis for the High Affinity Binding and Stabilization of Firefly Luciferase by PTC124

    E-Print Network [OSTI]

    Auld, Douglas S.; Lovell, Scott; Thorne, Natasha; Lea, Wendy A.; Maloney, David J.; Shen, Min; Rai, Ganesha; Battaile, Kevin P.; Thomas, Craig J.; Simeonov, Anton; Hanzlik, Robert P.; Inglese, James

    2010-03-16T23:59:59.000Z

    Douglas S. Auld, Scott Lovell, Natasha Thorne, Wendy A. Lea, David J. Maloney, Min Shen, Ganesha Rai, Kevin Battaile, Craig J. Thomas, Anton Simeonov, Robert P. Hanzlik, and James Inglese, "Molecular Basis for the High Affinity Binding... contains the author’s accepted manuscript. For the publisher’s version, see the link in the header of this document.] Paper citation: Douglas S. Auld, Scott Lovell, Natasha Thorne, Wendy A. Lea, David J. Maloney, Min Shen, Ganesha Rai, Kevin...

  10. Extractors for Low-Weight Affine Sources Institute for Advanced Study

    E-Print Network [OSTI]

    Anderson, Richard

    ], are functions that can be used to solve this problem. These are functions that are easy to invert given the enExtractors for Low-Weight Affine Sources Anup Rao Institute for Advanced Study arao@ias.edu January is a function AffExt : Fn {0, 1}m such that for any such source X, the distribution of AffExt(X) is close

  11. Towards Analytic Solutions of Step-Wise Safe Switching for Known Affine-Linear Models

    SciTech Connect (OSTI)

    Koumboulis, Fotis N.; Tzamtzi, Maria P. [Department of Automation, Halkis Institute of Technology, 34400 Psahna, Evia (Greece)

    2008-09-17T23:59:59.000Z

    In the present work we establish conditions which guarantee safe transitions for the closed-loop system produced by the application of the Step-Wise Safe Switching control approach to an affine linear system when the nonlinear description of the plant is known. These conditions are based on the local Input to State Stability (ISS) properties of the nonlinear system around the plant's nominal operating points.

  12. A review of "La Rochefoucauld par quatre chemins. Les Maximes et leurs ambivalence" by Eric Turcat

    E-Print Network [OSTI]

    Grele, Denis D.

    2014-01-01T23:59:59.000Z

    82 seventeenth-century news Eric Turcat. La Rochefoucauld par quatre chemins. Les Maximes et leurs ambivalence. Biblio 17, v. 206. Tübingen: Gunter Narr Verlag, 2013. 220 pp. ISBN 978-63-8233-6803-8. $65.91. Review by denis d. grélé, university...(s). For his part, Eric Turcat does not recoil from the challenge and offers in La Rochefoucauld par quatre chemins, not one but four possible methods of understanding apparent disparate fragments of thoughts. Each chapter of his book is devoted to one...

  13. Rglage du PID numrique par rduction de la complexit du rgulateur

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Réglage du PID numérique par réduction de la complexité du régulateur Zito Gianluca*, Landau Ioan procédure de synthèse des régulateurs PID numériques pour les systèmes d'ordre élevé est présentée. Cette modèle du système. L'estimation des paramètres du PID est faite par un algorithme du type identication en

  14. Safeguards Verification Measurements using Laser Ablation, Absorbance Ratio Spectrometry in Gaseous Centrifuge Enrichment Plants

    SciTech Connect (OSTI)

    Anheier, Norman C.; Cannon, Bret D.; Qiao, Hong (Amy) [Amy; Phillips, Jon R.

    2012-07-01T23:59:59.000Z

    Laser Ablation Absorbance Ratio Spectrometry (LAARS) is a new verification measurement technology under development at the US Department of Energy’s (DOE) Pacific Northwest National Laboratory (PNNL). LAARS uses three lasers to ablate and then measure the relative isotopic abundance of uranium compounds. An ablation laser is tightly focused on uranium-bearing solids producing a small plume containing uranium atoms. Two collinear wavelength-tuned spectrometry lasers transit through the plume and the absorbance of U-235 and U-238 isotopes are measured to determine U-235 enrichment. The measurement has high relative precision and detection limits approaching the femtogram range for uranium. It is independent of chemical form and degree of dilution with nuisance dust and other materials. High speed sample scanning and pinpoint characterization allow measurements on millions of particles/hour to detect and analyze the enrichment of trace uranium in samples. The spectrometer is assembled using commercially available components at comparatively low cost, and features a compact and low power design. Future designs can be engineered for reliable, autonomous deployment within an industrial plant environment. Two specific applications of the spectrometer are under development: 1) automated unattended aerosol sampling and analysis and 2) on-site small sample destructive assay measurement. The two applications propose game-changing technological advances in gaseous centrifuge enrichment plant (GCEP) safeguards verification. The aerosol measurement instrument, LAARS-environmental sampling (ES), collects aerosol particles from the plant environment in a purpose-built rotating drum impactor and then uses LAARS-ES to quickly scan the surface of the impactor to measure the enrichments of the captured particles. The current approach to plant misuse detection involves swipe sampling and offsite analysis. Though this approach is very robust it generally requires several months to obtain results from a given sample collection. The destructive assay instrument, LAARS-destructive assay (DA), uses a simple purpose-built fixture with a sampling planchet to collect adsorbed UF6 gas from a cylinder valve or from a process line tap or pigtail. A portable LAARS-DA instrument scans the microgram quantity of uranium collected on the planchet and the assay of the uranium is measured to ~0.15% relative precision. Currently, destructive assay samples for bias defect measurements are collected in small sample cylinders for offsite mass spectrometry measurement.

  15. Design of an Unattended Environmental Aerosol Sampling and Analysis System for Gaseous Centrifuge Enrichment Plants

    SciTech Connect (OSTI)

    Anheier, Norman C.; Munley, John T.; Alexander, M. L.

    2011-07-19T23:59:59.000Z

    The resources of the IAEA continue to be challenged by the rapid, worldwide expansion of nuclear energy production. Gaseous centrifuge enrichment plants (GCEPs) represent an especially formidable dilemma to the application of safeguard measures, as the size and enrichment capacity of GCEPs continue to escalate. During the early part of the 1990's, the IAEA began to lay the foundation to strengthen and make cost-effective its future safeguard regime. Measures under Part II of 'Programme 93+2' specifically sanctioned access to nuclear fuel production facilities and environmental sampling by IAEA inspectors. Today, the Additional Protocol grants inspection and environmental sample collection authority to IAEA inspectors at GCEPs during announced and low frequency unannounced (LFUA) inspections. During inspections, IAEA inspectors collect environmental swipe samples that are then shipped offsite to an analytical laboratory for enrichment assay. This approach has proven to be an effective deterrence to GCEP misuse, but this method has never achieved the timeliness of detection goals set forth by IAEA. Furthermore it is questionable whether the IAEA will have the resources to even maintain pace with the expansive production capacity of the modern GCEP, let alone improve the timeliness in reaching current safeguards conclusions. New safeguards propositions, outside of familiar mainstream safeguard measures, may therefore be required that counteract the changing landscape of nuclear energy fuel production. A new concept is proposed that offers rapid, cost effective GCEP misuse detection, without increasing LFUA inspection access or introducing intrusive access demands on GCEP operations. Our approach is based on continuous onsite aerosol collection and laser enrichment analysis. This approach mitigates many of the constraints imposed by the LFUA protocol, reduces the demand for onsite sample collection and offsite analysis, and overcomes current limitations associated with the in-facility misuse detection devices. Onsite environmental sample collection offers the ability to collect fleeting uranium hexafluoride emissions before they are lost to the ventilation system or before they disperse throughout the facility, to become deposited onto surfaces that are contaminated with background and historical production material. Onsite aerosol sample collection, combined with enrichment analysis, provides the unique ability to quickly detect stepwise enrichment level changes within the facility, leading to a significant strengthening of facility misuse deterence. We report in this paper our study of several GCEP environmental sample release scenarios and simulation results of a newly designed aerosol collection and particle capture system that is fully integrated with the Laser Ablation, Absorbance Ratio Spectrometry (LAARS) uranium particle enrichment analysis instrument that was developed at the Pacific Northwest National Laboratory.

  16. Le hakka, par Hilary Chappell et Laurent Sagart Le dialecte hakka est parl par quelque 35 millions de locuteurs, principalement dans le nord du

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    répandu hors de Chine, en particulier en Malaisie, dans le nord de Bornéo, en Guyane, au Surinam et à ont pu entraîner une forte animosité avec les populations chinoises plus anciennement établies. Cette («Puntis») dans la province de Canton. Méprisés par la société cantonaise, et assimilés aux She, population

  17. Les agricultures familiales refltent une trs grande diversit. Elles se caractrisent par une multitude de techniques, une richesse de savoir-faire et par une savante combinaison

    E-Print Network [OSTI]

    'arganiers, région de Tafraout, Maroc L'agriculture familiale ne saurait se passer de l'arbre et de la forêt. �pineux endémique du Maroc, l'arganier est parfaitement adapté à l'aridité. Les hommes ne le plantent pas mais 1998 « réserve de la biosphère » par l'Unesco. ©IRD-GenevièveMichon MAROC Les agricultures familiales

  18. Deconvolution of antibody affinities and concentrations by non-linear regression analysis of competitive ELISA data.

    SciTech Connect (OSTI)

    Stevens, F. J.; Bobrovnik, S. A.; Biosciences Division; Palladin Inst. Biochemistry

    2007-12-01T23:59:59.000Z

    Physiological responses of the adaptive immune system are polyclonal in nature whether induced by a naturally occurring infection, by vaccination to prevent infection or, in the case of animals, by challenge with antigen to generate reagents of research or commercial significance. The composition of the polyclonal responses is distinct to each individual or animal and changes over time. Differences exist in the affinities of the constituents and their relative proportion of the responsive population. In addition, some of the antibodies bind to different sites on the antigen, whereas other pairs of antibodies are sterically restricted from concurrent interaction with the antigen. Even if generation of a monoclonal antibody is the ultimate goal of a project, the quality of the resulting reagent is ultimately related to the characteristics of the initial immune response. It is probably impossible to quantitatively parse the composition of a polyclonal response to antigen. However, molecular regression allows further parameterization of a polyclonal antiserum in the context of certain simplifying assumptions. The antiserum is described as consisting of two competing populations of high- and low-affinity and unknown relative proportions. This simple model allows the quantitative determination of representative affinities and proportions. These parameters may be of use in evaluating responses to vaccines, to evaluating continuity of antibody production whether in vaccine recipients or animals used for the production of antisera, or in optimizing selection of donors for the production of monoclonal antibodies.

  19. Method of preparing and utilizing a catalyst system for an oxidation process on a gaseous hydrocarbon stream

    DOE Patents [OSTI]

    Berry, David A; Shekhawat, Dushyant; Smith, Mark; Haynes, Daniel

    2013-07-16T23:59:59.000Z

    The disclosure relates to a method of utilizing a catalyst system for an oxidation process on a gaseous hydrocarbon stream with a mitigation of carbon accumulation. The system is comprised of a catalytically active phase deposited onto an oxygen conducting phase, with or without supplemental support. The catalytically active phase has a specified crystal structure where at least one catalytically active metal is a cation within the crystal structure and coordinated with oxygen atoms within the crystal structure. The catalyst system employs an optimum coverage ratio for a given set of oxidation conditions, based on a specified hydrocarbon conversion and a carbon deposition limit. Specific embodiments of the catalyst system are disclosed.

  20. Health risk from earthquake caused releases of UF{sub 6} at the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Brown, N.W; Lu, S.; Chen, J.C.; Roehnelt, R.; Lombardi, D.

    1998-05-01T23:59:59.000Z

    The health risk to the public and workers from potential exposure to the toxic materials from earthquake caused releases of uranium hexafluoride from the Paducah gaseous Diffusion Plant are evaluated. The results of the study show that the health risk from earthquake caused releases is small, and probably less than risks associated with the transportation of hydrogen fluoride and other similar chemicals used by industry. The probability of more than 30 people experiencing health consequences (injuries) from earthquake damage is less than 4xlO{sup 4}/yr.

  1. Superfund record of decision (EPA Region 4): Paducah Gaseous Diffusion Plant, Northwest Plume, Paducah, KY, July 1993

    SciTech Connect (OSTI)

    Not Available

    1993-07-01T23:59:59.000Z

    This decision document presents the selected remedial action for the Northwest Plume at the Paducah Gaseous Diffusion Plant (PGDP) in Paducah, Kentucky. The primary objective of this interim remedial action is to initiate a first phase remedial action, as an interim action to initiate control of the source and mitigate the spread of contamination in the Northwest plume. This operable unit addresses a portion of the contaminated ground water. Additional interim actions associated with this integrator operable unit are being considered, as well as for other areas of contaminated ground water.

  2. Superfund record of decision (EPA Region 4): Paducah Gaseous Diffusion Plant (USDOE), Operable Unit 15, Paducah, KY, August 10, 1998

    SciTech Connect (OSTI)

    NONE

    1998-12-01T23:59:59.000Z

    This decision document presents the remedial action for the Solid Waste Management Unit (SWMU) 91 of the Waste Area Group (WAG) 27 at the Paducah Gaseous Diffusion Plant (PGDP) near Paducah, Kentucky. The primary objective of this remedial action is to reduce the level of TCE-contaminated soil thereby reducing the potential future concentrations in ground water that could pose a threat to human health and the environment at the POE (i.e., the DOE property boundary). The potential for migration of the contamination from the soil of the off-site aquifer is the concern associated with the SWMU.

  3. TUDE DU FACTEUR DE MULTIPLICATION DANS LA PILE DE SACLAY Par B. JACROT, F. NETTER et V. RAIEVSKI,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    31 ÉTUDE DU FACTEUR DE MULTIPLICATION DANS LA PILE DE SACLAY Par B. JACROT, F. NETTER et V facteur de multiplication effectif dans une pile,par des expériences en régime sous-critique. Ces méthodes sont appliquées à la déter- mination de l'effet sur la réactivité de différents paramètres de la pile

  4. LA DISTILLATION a t introduite en Occident avec l'alchimie au cours du XIIe sicle. Par convention, on

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    LA DISTILLATION a été introduite en Occident avec l'alchimie au cours du XIIe siècle. Par Pseudo-Geber, distingue plusieurs façons de distiller et propose même une classi- fication de ces distillat (per descensum). La distillation par élévation des vapeurs, ou per ascensum, nécessite l

  5. LA RPARTITION DE L'OZONE ATMOSPHRIQUE EN FONCTION DE L'ALTITUDE Par M. D. BARBIER.

    E-Print Network [OSTI]

    Boyer, Edmond

    LA RÉPARTITION DE L'OZONE ATMOSPHÉRIQUE EN FONCTION DE L'ALTITUDE Par M. D. BARBIER. Observatoire observations en déter- minant la distribution de l'ozone par une série de Charlier du type A. En général on ne peut déterminer que la quantité totale d'ozone et la hauteur moyenne de la distribution, ces quantités

  6. Vers une formule de Stirling de la factorielle de Bhargava pour des entiers reconnaissables par un automate

    E-Print Network [OSTI]

    Dumont, Serge

    Vers une formule de Stirling de la factorielle de Bhargava pour des entiers reconnaissables par un¸con intrins`eque en th´eorie des nombres. Ainsi l'estimation de cette fonction par la formule de Stirling se r savoir quel est l'analogue de la formule de Stirling pour un sous ensemble E ? Quels sont les propri

  7. Mitochondrial-DNA sequence variation, and the genetic affinity of Peromyscus from the Triangle Island, British Columbia, Canada 

    E-Print Network [OSTI]

    Arianpour, Roozbeh

    2013-02-22T23:59:59.000Z

    To determine the genetic and specific affinity of deer mice (Peromyscus) inhabiting Triangle Island, British Colombia, Canada, a 1,439 base-pair (bp) fragment of the mitochondrial genome (containing the ND3, ND4L, and a ...

  8. Phylogenetic relationships, host affinity, and geographic structure of boreal and arctic endophytes from three major plant lineages

    E-Print Network [OSTI]

    Arnold, A. Elizabeth

    Phylogenetic relationships, host affinity, and geographic structure of boreal and arctic endophytes Although associated with all plants, fungal endophytes (microfungi that live within healthy plant tissues, or phylogenetic relationships. We surveyed endophytic Ascomycota from healthy photosyn- thetic tissues of three

  9. Grant Title: INITIATIVE FOR MAXIMIZING STUDENT DEVELOPMENT (IMSD) (R25) Funding Opportunity Number: PAR-13-082. CFDA Number(s): 93.859.

    E-Print Network [OSTI]

    Farritor, Shane

    : PAR-13-082. CFDA Number(s): 93.859. Agency/Department: National Institutes of Health (NIH), National

  10. Dimensionnement et gestion d'un systme de stockage thermique par hydro-accumulation : application la

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Dimensionnement et gestion d'un système de stockage thermique par hydro-accumulation : application de stockage thermique de type hydro-accumulation destiné à une chaufferie collective multi, mix-énergétique, stockage thermique, hydro-accumulation, dimensionnement optimal, gestion, graphe d

  11. SUR LA CAUSE DE L'LECTRISATION DES NUAGES ORAGEUX; PAR M. H. PELLAT.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , Peltier a admis, pour expliquer les phé- nomènes électriques dont notre atmosphère est le siège, que le Peltier, qui est, non une hypothèse, mais bien une réalité. On sait, en effet, que par le beau temps le milieu isolant augmente en s'éloignant de la surface d'un conducteur, celle-ci est chargée d

  12. Louvain-la-Neuve, le 27 janvier 2011 Hunza ! : images du Pakistan, par Benoit Sneessens

    E-Print Network [OSTI]

    Nesterov, Yurii

    Louvain-la-Neuve, le 27 janvier 2011 « Hunza ! » : images du Pakistan, par Benoit Sneessens Du 1er trois ans, l'artiste a parcouru à pieds les sentiers escarpés de la vallée de Hunza, au Nord du Pakistan reportages à l'étranger, s'envole pour le Pakistan. Le but de son expédition : confronter l'image du pays

  13. LES GRANDEURS CARACTRISTIQUES DE LA PILE DE CHATILLON (1) Par L. KOWARSKI.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    751. LES GRANDEURS CARACTÉRISTIQUES DE LA PILE DE CHATILLON (1) Par L. KOWARSKI. Laboratoire du de la pile de Châtillon : cuve à eau lourde, barres actives contenant de l'oxyde d'uranium, bloc régime actuel de fonctionnement de la pile ainsi que la puissance qu'elle développe. Il termine en

  14. MESURE DES RACTIVITS DANS UNE PILE (1) Par JACQUES BERNOT et VICTOR RAIEVSKI,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    359. MESURE DES RÉACTIVITÉS DANS UNE PILE (1) Par JACQUES BERNOT et VICTOR RAIEVSKI, Service de la Pile de Saclay, Commissariat à l'Énergie atomique. Sommaire. 2014 Nous reprenons ici de façon plus'une pile. Cette méthode de comptage, appliquée à une pile essentiellement sous-critique, nécessite la

  15. DISTILLATION DES LIQUIDES SOUS L'INFLUENCE DE L'LECTRICIT STATIQUE; PAR M. D. GERNEZ.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    36I DISTILLATION DES LIQUIDES SOUS L'INFLUENCE DE L'ÉLECTRICITÉ STATIQUE; PAR M. D. GERNEZ. La décharge, la distillation se produit aussitôt en sens in- verse (2). Ce phénomène est extrêmemen t n e sens suivant lequel se produit cette distillation est contraire à celui que sem- bleraient indiquer les

  16. Friction dependence of shallow granular flows from discrete par-ticle simulations

    E-Print Network [OSTI]

    Al Hanbali, Ahmad

    Friction dependence of shallow granular flows from discrete par- ticle simulations Anthony Thornton relation for the macroscopic bed friction or basal roughness obtained from micro-scale discrete particle simulations of steady flows. We systematically vary the bed friction by changing the contact friction

  17. ED n364 : Sciences Fondamentales et Appliques Nattribu par la bibliothque

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    NUMERIQUE DU SOUDAGE PAR FROTTEMENT-MALAXAGE NUMERICAL SIMULATION OF THE FRICTION STIR WELDING PROCESS,version1-8Apr2008 #12;- 4 - ABSTRACT Despite considerable interests in the Friction Stir Welding (FSW the different stages of the Friction Stir Welding (FSW) process. A splitting method is utilized: a) the material

  18. Digestion des glucides cytoplasmiques de la fverole par le veau prruminant

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Digestion des glucides cytoplasmiques de la féverole par le veau préruminant J. M. BESLE B. LASSALAS, P. THIVEND Laboratoire de la Digestion des Ruminants, LN.R.A. Theix 63110 Beaumont France. Summary. Digestion of field bean cytoplasmic carbohydrates by the preruminant calf. Three veal calves

  19. Digestion des glucides de la levure d'alcanes par le veau prruminant

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Digestion des glucides de la levure d'alcanes par le veau préruminant J. M. BESLE, Bernadette LASSALAS, P. THIVEND Laboratoire de la Digestion des Ruminanfs, 1.N.R.A., Theix, 63110 Beaumont France. Summary. Digestion of alkane yeast carbohydrates by the preruminant calf. Four 15-day old preruminant

  20. Action de l'manation du radium sur les sels de thorium Par HERCHFINKEL

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    417 Action de l'émanation du radium sur les sels de thorium Par HERCHFINKEL [Faculté des Sciences'une solution d'azotate de thorium abandonnée a elle-même pendant plusieurs mois dégage une cer- taine quantité'on fait agir une forte quantité d'émanation de radium sur le même sPl de thorium il se produit en- core

  1. LES NEUTRONS DE FISSION ET LA RACTION EN CHAINE Par L. KOWARSKI.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    neutrons lors de la fission de l'uranium (Collège de France, mars1939, et Columbia University), à la, dont l'exploration fut la première étape dans la marche vers la conquête de l'énergie 'atomique. C et complétée par Frisch et Joliot, de la fission de l'uranium. Cette réaction, exothermique à un

  2. Jules Diawara, cole Centrale Paris (Laboratoire de Gnie des Procds et Matriaux) prsente par

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Jules Diawara, École Centrale Paris (Laboratoire de Génie des Procédés et Matériaux) 1 présentée par Jules Diawara Pour l'obtention du grade de Docteur de l'École Centrale des Arts et Manufactures tel-00658768,version1-11Jan2012 #12;Jules Diawara, École Centrale Paris (Laboratoire de Génie des

  3. Elaboration de pices micro composites hautes caractristiques mcaniques par fabrication additive (SLM) en conditions ractives

    E-Print Network [OSTI]

    Jeanjean, Louis

    fabrication additive (fabrication rapide) par fusion laser d'un lit de poudre (Selective Laser Melting ou SLM laser melting, fusion laser, métallurgie des poudres, réactions métal-gaz, composites. #12;Profil requis thermodynamique et cinétique réactionnelles sera encouragée. Mots clefs : Fabrication additive, SLM, selective

  4. Paternal age related schizophrenia (PARS): latent subgroups detected by k-means clustering analysis

    E-Print Network [OSTI]

    Ahn, Hongshik

    1 Paternal age related schizophrenia (PARS): latent subgroups detected by k-means clustering of schizophrenia with distinct etiology, pathophysiology and symptoms. This study uses a k-means clustering-R) and olfaction (University of Pennsylvania Smell Identification Test; UPSIT). We conducted a series of k-means

  5. OBSERVATION PAR MICROSCOPIE LECTRONIQUE D'AMAS DE LACUNES DANS LE NICKEL TREMP

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    285 OBSERVATION PAR MICROSCOPIE ÉLECTRONIQUE D'AMAS DE LACUNES DANS LE NICKEL TREMPÉ G. LOZES (1 décembre 1970) Résumé. 2014 Des échantillons de nickel de haute pureté ont été étudiés, après trempe, à la, dans le nickel, une forte tendance à l'agglomération, et qu'en dehors des amas visibles, il se forme d

  6. HISOIRE DU RSEAU DE L'INSERTION PAR L'ACTIVIT CONOMIQUE Philippe Brgeon

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    « Le travail du social » dirigée par Alain Vilbrod, aux éditions l'Harmattan Il s'appuie sur un travail'insertion ?, Les éditions l'harmattan (Ed.) (2008) 276" #12;2 2 de vue du nombre de salariés en insertion concernés

  7. CMENTATION DU NIOBIUM PAR DES SILICIURES DE TITANE ET DE CHROME EN VUE DE RALISER

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    551 CÉMENTATION DU NIOBIUM PAR DES SILICIURES DE TITANE ET DE CHROME EN VUE DE RÉALISER DES of titanium 2014 and chromium modified silicide coatings suitable for oxidation protection of niobium. One, susceptibles de protéger le niobium et ses alliages contre l'oxydation. Le disiliciure de niobium pur n

  8. BALAYAGE THERMIQUE DES ANNEAUX DE PEROT ET FABRY Par J. ROIG,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    is heated by a coil wound on the circumference, the required power being a few watts. The mounting is rigid. Résumé. - I. Récepteur photographique. - Une image du. diamètre des anneaux se forme sur la plaque. La. Une came de forme géométrique simple, commandée par un moteur synchrone, agit sur le rhéostat de

  9. ACARYOCHLORIS EXPLAINING THE RIDDLE OF CHLOROPHYLL D IN RED ALGAE AND EXPANDING PAR FOR OXYGENIC PHOTOSYNTHESIS

    E-Print Network [OSTI]

    Oregon, University of

    ACARYOCHLORIS ­ EXPLAINING THE RIDDLE OF CHLOROPHYLL D IN RED ALGAE AND EXPANDING PAR FOR OXYGENIC strain is shown to live epi- phytically on the red alga Gelidium caulacantheum, which itself is harvested by the red alga. Availability of far red light, however, is relatively unaffected by DOM or red

  10. LED Lighting Flicker and Potential Health Concerns: IEEE Standard PAR1789 Update

    E-Print Network [OSTI]

    Lehman, Brad

    LED Lighting Flicker and Potential Health Concerns: IEEE Standard PAR1789 Update Arnold Wilkins for mitigating health risks to viewers" has been formed to advise the lighting industry, ANSI/NEMA, IEC, EnergyStar and other standards groups about the emerging concern of flicker in LED lighting. This paper introduces

  11. PArAmedic AcAdemy College of Rural and Community Development

    E-Print Network [OSTI]

    Hartman, Chris

    PArAmedic AcAdemy College of Rural and Community Development Community and Technical College 907-455-2895 www.ctc.uaf.edu/programs/paramedic/ The paramedic academy prepares students to take the national para Medical Board. The paramedic academy offers the highest level of education avail- able to prepare for work

  12. La reprsentationdescauses de l'tat de sant par les infirmiers etlespointsde vueenvisagsdespatientset desaidantsnaturels

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    La représentationdescauses de l'état de santé par les infirmiers etlespointsde la représentation d'infirmiers hospitaliers expérimentés (n=44) et les différences de points de vue dans la relation soignant-soigné, nous faisons d'une part l'hypothèse que ces infirmiers exhiberont une

  13. Conception centree utilisateur de prototypes interactifs pour la gestion de contenu multimedia par similarite

    E-Print Network [OSTI]

    Dupont, Stéphane

    Conception centr´ee utilisateur de prototypes interactifs pour la gestion de contenu multimedia par de donn´ees mul- timedia, adapt´ees `a des cas d'utilisation divers et pro- fils d'utilisateurs vari similaire? L'interface utilisateur au service des cas d'utilisation La navigation et manipulation de

  14. LA GESTION DE RESULTAT PAR LES MONTAGES FINANCIERS DE TITRISATION : LE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 LA GESTION DE RESULTAT PAR LES MONTAGES FINANCIERS DE TITRISATION : LE CAS DES SOCIETES FRAN�AISES COTEES Patrick BOISSELIER Professeur des universités Conservatoire National des Arts et Métiers gestion Centre de Recherche en Ingénierie Financière et Finances publiques (Université de Nice

  15. Gestion de la Qualit de Service par les Hypercubes dans un Environnement

    E-Print Network [OSTI]

    Boyer, Edmond

    Gestion de la Qualité de Service par les Hypercubes dans un Environnement de Routage Multipoint : Cas des Protocoles PIM-SM et MPLS Mohamed Dafir ECH-CHERIF EL KETTANI Ecole Nationale Supérieure d mettre en °uvre une politique efficace de gestion de la Qualité de Service liée au groupe. Dans cet

  16. DIFFUSION ELASTIQUE DES NEUTRONS PAR LE TRITIUM A 14 MeV

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    DIFFUSION ELASTIQUE DES NEUTRONS PAR LE TRITIUM A 14 MeV Laboratoire de Neutronique, CNRS, Toulouse of neutrons from tritium is studied with a thin scatterer close to a Cs1 scintillator. The experimental. Le diffuseur utilisé est une cible mince contenant 2,22 an3 de tritium absorbé dans une épaisseur de

  17. Sur le rapport isoperimetrique du tetra`edre par Jean-Pierre Demailly

    E-Print Network [OSTI]

    Demailly, Jean-Pierre

    Sur le rapport isop´erim´etrique du t´etra`edre par Jean-Pierre Demailly Professeur `a l triangle ABC, comment choisir le quatri`eme sommet D de fa¸con que le rapport isop´erim´etrique du t´etra`edre´egalit´es contradictoires 0 = - µ + edre

  18. The role of uPAR signaling in lung cancer Background and significance

    E-Print Network [OSTI]

    Gleeson, Joseph G.

    The role of uPAR signaling in lung cancer Background and significance Lung cancer is the leading of lung cancer ­ non-small-cell-lung cancer (about 85% of all lung cancer cases) and small- cell-lung cancer (about 15%) (Herbst et al., 2008). Small cell lung carcinoma (SCLC) is rapidly growing and often

  19. Projet Autoroutier Pilote Aubonne -Belmont pour une Initiative Lausannoise d'Evaluation par Simulation

    E-Print Network [OSTI]

    Bierlaire, Michel

    par Simulation Simulation-based evaluation of the impact of telematics in the Lausanne area: a pilot, either on the efficiency of the road network or the security of its users. The PAPABILES pilot of the network, using a state- of-the-art simulation tool (MITSIM), developed at the Massachusetts Institute

  20. Summary and Outlook of the International Workshop on Aging Phenomena in Gaseous Detectors (DESY, Hamburg, October, 2001)

    E-Print Network [OSTI]

    Titov, M L; Padilla, C; Tesch, N

    2002-01-01T23:59:59.000Z

    High Energy Physics experiments are currently entering a new era which requires the operation of gaseous particle detectors at unprecedented high rates and integrated particle fluxes. Full functionality of such detectors over the lifetime of an experiment in a harsh radiation environment is of prime concern to the involved experimenters. New classes of gaseous detectors such as large-scale straw-type detectors, Micro-pattern Gas Detectors and related detector types with their own specific aging effects have evolved since the first workshop on wire chamber aging was held at LBL, Berkeley in 1986. In light of these developments and as detector aging is a notoriously complex field, the goal of the workshop was to provide a forum for interested experimentalists to review the progress in understanding of aging effects and to exchange recent experiences. A brief summary of the main results and experiences reported at the 2001 workshop is presented, with the goal of providing a systematic review of aging effects in ...

  1. Pattern recognition techniques to reduce backgrounds in the search for the {sup 136}Xe double beta decay with gaseous TPCs

    SciTech Connect (OSTI)

    Iguaz, F. J.; Cebrián, S.; Dafni, T.; Gómez, H.; Herrera, D. C.; Irastorza, I. G.; Luzon, G.; Segui, L.; Tomas, A. [Laboratorio de Física Nuclear y Astropartículas, Universidad de Zaragoza (Spain)] [Laboratorio de Física Nuclear y Astropartículas, Universidad de Zaragoza (Spain)

    2013-08-08T23:59:59.000Z

    The observation of the neutrinoless double beta decay may provide essential information on the nature of neutrinos. Among the current experimental approaches, a high pressure gaseous TPC is an attractive option for the search of double beta decay due to its good energy resolution and the detailed topological information of each event. We present in this talk a detailed study of the ionization topology of the {sup 136}Xe double beta decay events in a High Pressure Xenon TPC, as well as that of the typical competing backgrounds. We define some observables based on graph theory concepts to develop automated discrimination algorithms. Our criteria are able to reduce the background level by about three orders of magnitude in the region of interest of the {sup 136}Xe Q{sub ??} for a signal acceptance of 40%. This result provides a quantitative assessment of the benefit of topological information offered by gaseous TPCs for double beta decay search, and proves that it is a promising feature in view of future experiments in the field. Possible ideas for further improvement in the discrimination algorithms and the dependency of these results with the gas diffusion and readout granularity will be also discussed.

  2. Project Plan 7930 Cell G PaR Remote Handling System Replacement

    SciTech Connect (OSTI)

    Kinney, Kathryn A [ORNL

    2009-10-01T23:59:59.000Z

    For over 40 years the US Department of Energy (DOE) and its predecessors have made Californium-252 ({sup 252}Cf) available for a wide range of industries including medical, nuclear fuels, mining, military and national security. The Radiochemical Engineering Development Center (REDC) located within the Oak Ridge National Laboratory (ORNL) processes irradiated production targets from the High Flux Isotope Reactor (HFIR). Operations in Building 7930, Cell G provide over 70% of the world's demand for {sup 252}Cf. Building 7930 was constructed and equipped in the mid-1960s. Current operations for {sup 252}Cf processing in Building 7930, Cell G require use of through-the-wall manipulators and the PaR Remote Handling System. Maintenance and repairs for the manipulators is readily accomplished by removal of the manipulator and relocation to a repair shop where hands-on work can be performed in glove boxes. Contamination inside cell G does not currently allow manned entry and no provisions were created for a maintenance area inside the cell. There has been no maintenance of the PaR system or upgrades, leaving operations vulnerable should the system have a catastrophic failure. The Cell G PaR system is currently being operated in a run to failure mode. As the manipulator is now 40+ years old there is significant risk in this method of operation. In 2006 an assessment was completed that resulted in recommendations for replacing the manipulator operator control and power centers which are used to control and power the PaR manipulator in Cell G. In mid-2008 the chain for the bridge drive failed and subsequent examinations indicated several damaged links (see Figure 1). To continue operations the PaR manipulator arm is being used to push and pull the bridge as a workaround. A retrieval tool was fabricated, tested and staged inside Cell G that will allow positioning of the bridge and manipulator arm for removal from the cell should the PaR system completely fail. A fully functioning and reliable Par manipulator arm is necessary for uninterrupted {sup 252}Cf operations; a fully-functioning bridge is needed for the system to function as intended.

  3. APPLICATION OF THE LASAGNA{trademark} SOIL REMEDIATION TECHNOLOGY AT THE DOE PADUCAH GASEOUS DIFFUSION PLANT

    SciTech Connect (OSTI)

    Swift, Barry D.; Tarantino, Joseph J., P. E.

    2003-02-27T23:59:59.000Z

    The Paducah Gaseous Diffusion Plant (PGDP), owned by the Department of Energy (DOE), has been enriching uranium since the early 1950s. The enrichment process involves electrical and mechanical components that require periodic cleaning. The primary cleaning agent was trichloroethene (TCE) until the late 1980s. Historical documentation indicates that a mixture of TCE and dry ice were used at PGDP for testing the integrity of steel cylinders, which stored depleted uranium. TCE and dry ice were contained in a below-ground pit and used during the integrity testing. TCE seeped from the pit and contaminated the surrounding soil. The Lasagna{trademark} technology was identified in the Record of Decision (ROD) as the selected alternative for remediation of the cylinder testing site. A public-private consortium formed in 1992 (including DOE, the U.S. Environmental Protection Agency, and the Kentucky Department for Environmental Protection, Monsanto, DuPont, and General Electric) developed the Lasagna{trademark} technology. This innovative technology employs electrokinetics to remediate soil contaminated with organics and is especially suited to sites with low permeability soils. This technology uses direct current to move water through the soil faster and more uniformly than hydraulic methods. Electrokinetics moves contaminants in soil pore water through treatment zones comprised of iron filings, where the contaminants are decomposed to basic chemical compounds such as ethane. After three years of development in the laboratory, the consortium field tested the Lasagna{trademark} process in several phases. CDM installed and operated Phase I, the trial installation and field test of a 150-square-foot area selected for a 120-day run in 1995. Approximately 98 percent of the TCE was removed. CDM then installed and operated the next phase (IIa), a year-long test on a 600-square-foot site. Completed in July 1997, this test removed 75 percent of the total volume of TCE down to a depth of 45 feet. TCE in the test sites. Based on the successful field tests (Phases I and IIa), the ROD was prepared and the Lasagna{trademark} alternative was selected for remediation of TCE contaminated soils at the cylinder testing site Solid Waste Management Unit 91(SWMU 91). Bechtel Jacobs Company LLC contracted CDM to construct and operate a full-scale Lasagna{trademark} remediation system at the site (Phase IIb). Construction began in August 1999 and the operational phase was initiated in December 1999. The Lasagna{trademark} system was operated for two years and reduced the average concentration of TCE in SWMU 91 soil from 84 ppm to less than 5.6 ppm. Verification sampling was conducted during May, 2002. Results of the verification sampling indicated the average concentration of TCE in SWMU 91 soil was 0.38 ppm with a high concentration of 4.5 ppm.

  4. Investigation of high temperature gaseous species by Knudsen cell mass spectrometry above the condensed systems Au-Ge-Cu and Au-Si / by Joseph Edward Kingcade

    E-Print Network [OSTI]

    Kingcade, Joseph Edward

    1978-01-01T23:59:59.000Z

    : Chemistry INVESTIGATION OF HIGH TEMPERATURE GASEOUS SPECIES BY KNUDSEN CELL MASS SPECTROMETRY ABOVE THE CONDENSED SYSTEMS Au-Ge-Cu AND Au-Si A Thesis by Joseph Edward Kingcade Jr. Approved as to style and content by: ( Chairman of omittee ) ( Head... of Department ) /& I) au~ ( Member ) ( Member ) May 1 978 ABS TRAC T Investigation of High Temperature Gaseous Species by Knudsen Cell Mass Spectrometry Above the Condensed Systems Au-Ge-Cu and Au-Si. ( May 1978 ) Joseph Edward Kingcade Jr. , B. Sc...

  5. A discrete analogue of periodic delta Bose gas and affine Hecke algebra

    E-Print Network [OSTI]

    Yoshihiro Takeyama

    2014-03-12T23:59:59.000Z

    We consider an eigenvalue problem for a discrete analogue of the Hamiltonian of the non-ideal Bose gas with delta-potentials on a circle. It is a two-parameter deformation of the discrete Hamiltonian for joint moments of the partition function of the O'Connell-Yor semi-discrete polymer. We construct the propagation operator by using integral-reflection operators, which give a representation of the affine Hecke algebra. We also construct eigenfunctions by means of the Bethe ansatz method.

  6. Field Equations of the CP(N-1) Affine Gauge Theory

    E-Print Network [OSTI]

    P. Leifer; L. P. Horwitz

    2006-07-25T23:59:59.000Z

    A non-linear relativistic 4D field model of a quantum particle which emerges from the internal dynamics in the quantum phase space $CP(N-1)$ is proposed. In this model there is no distinction between `particle' and its `surrounding field', and the space-time manifold emerges from the description of the quantum state. The quantum observables of the `quantum particle field' are described in terms of the affine parallel transport of the local dynamical variables in $CP(N-1)$.

  7. Dirac spinor fields in the teleparallel gravity: comment on "Metric-affine approach to teleparallel gravity"

    E-Print Network [OSTI]

    J. W. Maluf

    2003-04-01T23:59:59.000Z

    We show that the coupling of a Dirac spinor field with the gravitational field in the teleparallel equivalent of general relativity is consistent. For an arbitrary SO(3,1) connection there are two possibilities for the coupling of the spinor field with the gravitational field. The problems of consistency raised by Y. N. Obukhov and J. G. Pereira in the paper {\\it Metric-affine approach to teleparallel gravity} [gr-qc/0212080] take place only in the framework of one particular coupling. By adopting an alternative coupling the consistency problem disappears.

  8. Rapid purification of circular DNA by triplex-mediated affinity capture

    DOE Patents [OSTI]

    Ji, Huamin (4817 Sheboygan Ave., Madison, WI 53705); Smith, Lloyd M. (1115 Amherst Dr., Madison, WI 53705)

    1997-01-01T23:59:59.000Z

    A single-step capture of a target supercoiled double-stranded DNA molecule is accomplished by forming a local triple-helix among two strands of the supercoiled circular DNA and an oligonucleotide probe. The oligonucleotide is bound to an immobilizing support which facilitates the immobilization and purification of target DNA molecules. Non-target DNA molecules and other contaminating cellular material are easily removed by washing. The triple-helical structure is destabilized by raising the pH, leaving purified target DNA in the supernatant and reusable affinity capture oligonucleotide secured to the immobilizing support.

  9. Gamma radiological surveys of the Oak Ridge Reservation, Paducah Gaseous Diffusion Plant, and Portsmouth Gaseous Diffusion Plant, 1990-1993, and overview of data processing and analysis by the Environmental Restoration Remote Sensing Program, Fiscal Year 1995

    SciTech Connect (OSTI)

    Smyre, J.L.; Moll, B.W.; King, A.L.

    1996-06-01T23:59:59.000Z

    Three gamma radiological surveys have been conducted under auspices of the ER Remote Sensing Program: (1) Oak Ridge Reservation (ORR) (1992), (2) Clinch River (1992), and (3) Portsmouth Gaseous Diffusion Plant (PORTS) (1993). In addition, the Remote Sensing Program has acquired the results of earlier surveys at Paducah Gaseous Diffusion Plant (PGDP) (1990) and PORTS (1990). These radiological surveys provide data for characterization and long-term monitoring of U.S. Department of Energy (DOE) contamination areas since many of the radioactive materials processed or handled on the ORR, PGDP, and PORTS are direct gamma radiation emitters or have gamma emitting daughter radionuclides. High resolution airborne gamma radiation surveys require a helicopter outfitted with one or two detector pods, a computer-based data acquisition system, and an accurate navigational positioning system for relating collected data to ground location. Sensors measure the ground-level gamma energy spectrum in the 38 to 3,026 KeV range. Analysis can provide gamma emission strength in counts per second for either gross or total man-made gamma emissions. Gross count gamma radiation includes natural background radiation from terrestrial sources (radionuclides present in small amounts in the earth`s soil and bedrock), from radon gas, and from cosmic rays from outer space as well as radiation from man-made radionuclides. Man-made count gamma data include only the portion of the gross count that can be directly attributed to gamma rays from man-made radionuclides. Interpretation of the gamma energy spectra can make possible the determination of which specific radioisotopes contribute to the observed man-made gamma radiation, either as direct or as indirect (i.e., daughter) gamma energy from specific radionuclides (e.g., cesium-137, cobalt-60, uranium-238).

  10. In vitro and in vivo radiosensitization by 2-nitroimidazoles more electron-affinic than misonidazole

    SciTech Connect (OSTI)

    Brown, D.M. (Stanford Univ., CA); Yu, N.Y.; Brown, J.M.; Lee, W.W.

    1982-03-01T23:59:59.000Z

    A series of 5-substituted-methyl-2 nitroimidazoles, more electron-affinic than misonidazole (MISO), has been studied as potential hypoxic cell radiosensitizers. In vitro radiosensitization studies of these compounds showed equivalent or greater radiosensitization than MISO, while LD/sub 50/ studies of the compounds found them to be, in general, more toxic to Balb/c mice than MISO. Radiosensitization experiments in vivo with compounds SR-2537, SR-2515 and SR-2553 of acceptable toxicity were not able to sensitize the EMT6 tumor to x-irradiation after a single intraperitoneal injection. However, moderate sensitization was achieved when SR-2537 was administered i.v. Rapid metabolism of these more electron-affinic compounds was suggested as a possible case of the poor sensitization. However, when multiple i.v. injections of SR-2537 were given to maintain a constant drug level in the tumor, radiosensitization by this compound did not improve, suggesting that intact drug was either not reaching or was not penetrating the hypoxic cells.

  11. Structural control of elastic moduli in ferrogels and the importance of non-affine deformations

    E-Print Network [OSTI]

    Giorgio Pessot; Peet Cremer; Dmitry Y. Borin; Stefan Odenbach; Hartmut Löwen; Andreas M. Menzel

    2014-10-21T23:59:59.000Z

    One of the central appealing properties of magnetic gels and elastomers is that their elastic moduli can reversibly be adjusted from outside by applying magnetic fields. The impact of the internal magnetic particle distribution on this effect has been outlined and analyzed theoretically. In most cases, however, affine sample deformations are studied and often regular particle arrangements are considered. Here we challenge these two major simplifications by a systematic approach using a minimal dipole-spring model. Starting from different regular lattices, we take into account increasingly randomized structures, until we finally investigate an irregular texture taken from a real experimental sample. On the one hand, we find that the elastic tunability qualitatively depends on the structural properties, here in two spatial dimensions. On the other hand, we demonstrate that the assumption of affine deformations leads to increasingly erroneous results the more realistic the particle distribution becomes. Understanding the consequences of the assumptions made in the modeling process is important on our way to support an improved design of these fascinating materials.

  12. Double affine Hecke algebras of rank 1 and the $Z_3$-symmetric Askey-Wilson relations

    E-Print Network [OSTI]

    Ito, Tatsuro

    2010-01-01T23:59:59.000Z

    We consider the double affine Hecke algebra $H=H(k_0,k_1,k^\\vee_0,k^\\vee_1;q)$ associated with the root system $(C^\\vee_1,C_1)$. We display three elements $x,y,z$ in $H$ that satisfy essentially the $Z_3$-symmetric Askey-Wilson relations. We obtain the relations as follows. We introduce an algebra $\\hat H$ that is more general than $H$, called the universal double affine Hecke algebra of type $(C_1^\\vee,C_1)$. An advantage of $\\hat H$ over $H$ is that it is parameter free and has a larger automorphism group. We give a surjective algebra homomorphism ${\\hat H} \\to H$. We define some elements $x,y,z$ in $\\hat H$ that get mapped to their counterparts in $H$ by this homomorphism. We give an action of Artin's braid group $B_3$ on $\\hat H$ that acts nicely on the elements $x,y,z$; one generator sends $x\\mapsto y\\mapsto z \\mapsto x$ and another generator interchanges $x,y$. Using the $B_3$ action we show that the elements $x,y,z$ in $\\hat H$ satisfy three equations that are essentially $Z_3$-symmetric Askey-Wilson r...

  13. An interim report to the manager of the Paducah Gaseous Diffusion Plant from the Paducah Environmental Advisory Committee

    SciTech Connect (OSTI)

    Jackson, G.D.

    1987-10-01T23:59:59.000Z

    The Paducah Environmental Advisory Committee was formed as: (1) an outgrowth of other Environmental Advisory Committees already in existence at Oak Ridge and other Martin Marietta Energy Systems plants; (2) a result of public concern following significant nuclear incidents at Bhopal and Chernobyl; (3) a result of the new direction and commitment of the management of the Paducah Gaseous Diffusion Plant following contract acquisition by Martin Marietta Energy Systems; and (4) a means of reducing and/or preventing local and/or public concern regarding the activities of and potential risks created by PGDP. This report discusses the following issues and concerns of the Committee arrived at through a series of meetings: (1) groundwater monitoring; (2) long-range tails storage; C-404, scrap yrads, and PCB and TCE cleanup; nuclear criticality plan and alarm systems; documentation of historical data regarding hazardous waste burial grounds; dosimeter badges; and asbestos handling and removal.

  14. Apparatus and method for generating continuous wave 16. mu. m laser radiation using gaseous CF/sub 4/

    DOE Patents [OSTI]

    Telle, J.M.

    1984-05-01T23:59:59.000Z

    Apparatus and method for generating continuous wave 16 ..mu..m laser radiation using gaseous CF/sub 4/. Laser radiation at 16 ..mu..m has been observed in a cooled static cell containing low pressure CF/sub 4/ optically pumped by an approximately 3 W output power c-w CO/sub 2/ laser. The laser cavity employed was a multiple-pass off-axis-path two spherical mirror ring resonator. Unidirectional CF/sub 4/ laser output power at 615 cm/sup -1/ exceeded 2 mW. Computer calculations indicate that for modest pump powers of about 40 W, approximately 1 W of emitted laser radiation at 16 ..mu..m might be obtained.

  15. Apparatus and method for generating continuous wave 16 .mu.m laser radiation using gaseous CF.sub.4

    DOE Patents [OSTI]

    Telle, John M. (Los Alamos, NM)

    1986-01-01T23:59:59.000Z

    Apparatus and method for generating continuous wave 16 .mu.m laser radiation using gaseous CF.sub.4. Laser radiation at 16 .mu.m has been observed in a cooled static cell containing low pressure CF.sub.4 optically pumped by an approximately 3 W output power cw CO.sub.2 laser. The laser cavity employed was a multiple-pass off-axis-path two spherical mirror ring resonator. Unidirectional CF.sub.4 laser output power at 615 cm.sup.-1 exceeded 2 mW. Computer calculations indicate that for modest pump powers of about 40 W, approximately 1 W of emitted laser radiation at 16 .mu.m might be obtained.

  16. Utilization of 4-Dimensional Data Visualization Modeling to Evaluate Burial Ground Contaminants at the Paducah Gaseous Diffusion Plant, Paducah, Kentucky

    SciTech Connect (OSTI)

    Brindley, T. L.; Tarantino, J. J.; Locke, A. L. [CDM, 325 Kentucky Ave., Kevil, Kentucky 42053 (United States); Dollins, D. W. [Department of Energy, Paducah Gaseous Diffusion Plant, Paducah Kentucky 42001 (United States)

    2006-07-01T23:59:59.000Z

    This paper describes how 4-Dimensional (4D) Data Visualization Modeling was used to evaluate historical data and to help guide the decisions for the sampling necessary to complete a Remedial Investigation/Feasibility Study (RI/FS) for the burial ground sites at the Department of Energy (DOE) Paducah Gaseous Diffusion Plant (PGDP). DOE at the Paducah Site is primarily involved in environmental cleanup and landlord activities. The scope of this project was to prepare a work plan for identifying the data available and the data required to conduct an RI/FS for the Burial Ground Operable Unit (BGOU) located within and near PGDP. The work plan focuses on collecting existing information about contamination in and around the burial grounds and determining what additional data are required to support an assessment of risks to human health and the environment and to support future decisions regarding actions to reduce these risks. (authors)

  17. The Mailbox Computer System for the IAEA verification experiment on HEU downlending at the Portsmouth Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Aronson, A.L.; Gordon, D.M.

    2000-07-31T23:59:59.000Z

    IN APRIL 1996, THE UNITED STATES (US) ADDED THE PORTSMOUTH GASEOUS DIFFUSION PLANT TO THE LIST OF FACILITIES ELIGIBLE FOR THE APPLICATION OF INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA) SAFEGUARDS. AT THAT TIME, THE US PROPOSED THAT THE IAEA CARRY OUT A ''VERIFICATION EXPERIMENT'' AT THE PLANT WITH RESPECT TO DOOWNBLENDING OF ABOUT 13 METRIC TONS OF HIGHLY ENRICHED URANIUM (HEU) IN THE FORM OF URANIUM HEXAFLUROIDE (UF6). DURING THE PERIOD DECEMBER 1997 THROUGH JULY 1998, THE IAEA CARRIED OUT THE REQUESTED VERIFICATION EXPERIMENT. THE VERIFICATION APPROACH USED FOR THIS EXPERIMENT INCLUDED, AMONG OTHER MEASURES, THE ENTRY OF PROCESS-OPERATIONAL DATA BY THE FACILITY OPERATOR ON A NEAR-REAL-TIME BASIS INTO A ''MAILBOX'' COMPUTER LOCATED WITHIN A TAMPER-INDICATING ENCLOSURE SEALED BY THE IAEA.

  18. Detection of illicit HEU production in gaseous centrifuge enrichment plants using neutron counting techniques on product cylinders

    SciTech Connect (OSTI)

    Freeman, Corey R [Los Alamos National Laboratory; Geist, William H [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    Innovative and novel safeguards approaches are needed for nuclear energy to meet global energy needs without the threat of nuclear weapons proliferation. Part of these efforts will include creating verification techniques that can monitor uranium enrichment facilities for illicit production of highly-enriched uranium (HEU). Passive nondestructive assay (NDA) techniques will be critical in preventing illicit HEU production because NDA offers the possibility of continuous and unattended monitoring capabilities with limited impact on facility operations. Gaseous centrifuge enrichment plants (GCEP) are commonly used to produce low-enriched uranium (LEU) for reactor fuel. In a GCEP, gaseous UF{sub 6} spins at high velocities in centrifuges to separate the molecules containing {sup 238}U from those containing the lighter {sup 235}U. Unfortunately, the process for creating LEU is inherently the same as HEU, creating a proliferation concern. Insuring that GCEPs are producing declared enrichments poses many difficult challenges. In a GCEP, large cascade halls operating thousands of centrifuges work together to enrich the uranium which makes effective monitoring of the cascade hall economically prohibitive and invasive to plant operations. However, the enriched uranium exiting the cascade hall fills product cylinders where the UF{sub 6} gas sublimes and condenses for easier storage and transportation. These product cylinders hold large quantities of enriched uranium, offering a strong signal for NDA measurement. Neutrons have a large penetrability through materials making their use advantageous compared to gamma techniques where the signal is easily attenuated. One proposed technique for detecting HEU production in a GCEP is using neutron coincidence counting at the product cylinder take off stations. This paper discusses findings from Monte Carlo N-Particle eXtended (MCNPX) code simulations that examine the feasibility of such a detector.

  19. Dispersion of UO{sub 2}F{sub 2} aerosol and HF vapor in the operating floor during winter ventilation at the Paducah Gaseous Diffusion Plant

    SciTech Connect (OSTI)

    Kim, S.H.; Chen, N.C.J.; Taleyarkhan, R.P.; Keith, K.D.; Schmidt, R.W. [Oak Ridge National Lab., TN (United States); Carter, J.C. [J.C. Carter Associates, Inc., Knoxville, TN (United States)

    1996-12-30T23:59:59.000Z

    The gaseous diffusion process is currently employed at two plants in the US: the Paducah Gaseous Diffusion Plant and the Portsmouth Gaseous Diffusion Plant. As part of a facility-wide safety evaluation, a postulated design basis accident involving large line-rupture induced releases of uranium hexafluoride (UF{sub 6}) into the process building of a gaseous diffusion plant (GDP) is evaluated. When UF{sub 6} is released into the atmosphere, it undergoes an exothermic chemical reaction with moisture (H{sub 2}O) in the air to form vaporized hydrogen fluoride (HF) and aerosolized uranyl fluoride (UO{sub 2}F{sub 2}). These reactants disperse in the process building and transport through the building ventilation system. The ventilation system draws outside air into the process building, distributes it evenly throughout the building, and discharges it to the atmosphere at an elevated temperature. Since air is recirculated from the cell floor area to the operating floor, issues concerning in-building worker safety and evacuation need to be addressed. Therefore, the objective of this study is to evaluate the transport of HF vapor and UO{sub 2}F{sub 2} aerosols throughout the operating floor area following B-line break accident in the cell floor area.

  20. Type B Accident Investigation of the August 22, 2000, Injury Resulting From Violent Exothermic Chemical Reaction at the Portsmouth Gaseous Diffusion Plant, X-701B Site

    Broader source: Energy.gov [DOE]

    On August 22, 2000, an accident occurred at the U. S. Department of Energy (DOE) Portsmouth Gaseous Diffusion Plant (PORTS) located in Piketon, Ohio. An employee of the IT Corporation (IT) working on an Environmental Management (EM) Technology Deployment Project received serious burns from a violent chemical reaction.