Sample records for rrl pwr line

  1. Grand Valley Rrl Pwr Line, Inc | 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 are8COaBulkTransmissionSitingProcess.pdfGetec AG Contracting JumpGove County,Texas: Energy ResourcesGrand Valley Rrl

  2. Seward County Rrl Pub Pwr Dist | 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 with form HistoryRistma AG Jump638324°,Schnell ZToolsSupplySeville Board

  3. TITAN code development for application to a PWR steam line break accident : final report 1983-1984

    E-Print Network [OSTI]

    Tsai, Chon-Kwo

    1984-01-01T23:59:59.000Z

    Modification of the TITAN computer code which enables it to be applied to a PWR steam line break accident has been accomplished. The code now has the capability of simulating an asymmetric inlet coolant temperature transient ...

  4. Three dimensional effects in analysis of PWR steam line break accident

    E-Print Network [OSTI]

    Tsai, Chon-Kwo

    A steam line break accident is one of the possible severe abnormal transients in a pressurized water reactor. It is required to present an analysis of a steam line break accident in the Final Safety Analysis Report (FSAR) ...

  5. THE GREEN BANK TELESCOPE H II REGION DISCOVERY SURVEY. IV. HELIUM AND CARBON RECOMBINATION LINES

    SciTech Connect (OSTI)

    Wenger, Trey V.; Bania, T. M. [Astronomy Department, 725 Commonwealth Avenue, Boston University, Boston, MA 02215 (United States)] [Astronomy Department, 725 Commonwealth Avenue, Boston University, Boston, MA 02215 (United States); Balser, Dana S. [National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA, 22903-2475 (United States)] [National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA, 22903-2475 (United States); Anderson, L. D. [Department of Physics, West Virginia University, Morgantown, WV 26506 (United States)] [Department of Physics, West Virginia University, Morgantown, WV 26506 (United States)

    2013-02-10T23:59:59.000Z

    The Green Bank Telescope H II Region Discovery Survey (GBT HRDS) found hundreds of previously unknown Galactic regions of massive star formation by detecting hydrogen radio recombination line (RRL) emission from candidate H II region targets. Since the HRDS nebulae lie at large distances from the Sun, they are located in previously unprobed zones of the Galactic disk. Here, we derive the properties of helium and carbon RRL emission from HRDS nebulae. Our target sample is the subset of the HRDS that has visible helium or carbon RRLs. This criterion gives a total of 84 velocity components (14% of the HRDS) with helium emission and 52 (9%) with carbon emission. For our highest quality sources, the average {sup 4}He{sup +}/H{sup +} abundance ratio by number, (y {sup +}), is 0.068 {+-} 0.023(1{sigma}). This is the same ratio as that measured for the sample of previously known Galactic H II regions. Nebulae without detected helium emission give robust y {sup +} upper limits. There are 5 RRL emission components with y {sup +} less than 0.04 and another 12 with upper limits below this value. These H II regions must have either a very low {sup 4}He abundance or contain a significant amount of neutral helium. The HRDS has 20 nebulae with carbon RRL emission but no helium emission at its sensitivity level. There is no correlation between the carbon RRL parameters and the 8 {mu}m mid-infrared morphology of these nebulae.

  6. BWR Fuel Assembly BWR Fuel Assembly PWR Fuel Assembly

    National Nuclear Security Administration (NNSA)

    BWR Fuel Assembly BWR Fuel Assembly PWR Fuel Assembly PWR Fuel Assembly The PWR 17x17 assembly is approximately 160 inches long (13.3 feet), 8 inches across, and weighs 1,500 lbs....

  7. Preliminary study on direct recycling of spent PWR fuel in PWR system

    SciTech Connect (OSTI)

    Waris, Abdul; Nuha; Novitriana; Kurniadi, Rizal; Su'ud, Zaki [Nuclear Physics and Biophysics Research Division, Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesa 10 Bandung 40132 (Indonesia)

    2012-06-06T23:59:59.000Z

    Preliminary study on direct recycling of PWR spent fuel to support SUPEL (Straight Utilization of sPEnt LWR fuel in LWR system) scenario has been conducted. Several spent PWR fuel compositions in loaded PWR fuel has been evaluated to obtain the criticality of reactor. The reactor can achieve it criticality for U-235 enrichment in the loaded fresh fuel is at least 4.0 a% with the minimum fraction of the spent fuel in the core is 15.0 %. The neutron spectra become harder with the escalating of U-235 enrichment in the loaded fresh fuel as well as the amount of the spent fuel in the core.

  8. applications pwr bwr: Topics by E-print Network

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

    reactivity and power distributions ... Inoue, Yuichiro, 1969- 2004-01-01 5 Ris9-R-609(EN) Simulation ofa PWR Power Plant Multidisciplinary Databases and Resources Websites Summary:...

  9. Ris9-R-609(EN) Simulation ofa PWR Power Plant

    E-Print Network [OSTI]

    Ris9-R-609(EN) Simulation ofa PWR Power Plant for Process Control and Diagnosis Finn Ravnsbjerg Nielsen Risø National Laboratory, Roskilde, Denmark December 1991 #12;Simulation of a PWR Power Plant *^R a compute simulation of a simplified pressurized nuclear power plant model directed towards process control

  10. Zebra: An advanced PWR lattice code

    SciTech Connect (OSTI)

    Cao, L.; Wu, H.; Zheng, Y. [School of Nuclear Science and Technology, Xi'an Jiaotong Univ., No. 28, Xianning West Road, Xi'an, ShannXi, 710049 (China)

    2012-07-01T23:59:59.000Z

    This paper presents an overview of an advanced PWR lattice code ZEBRA developed at NECP laboratory in Xi'an Jiaotong Univ.. The multi-group cross-section library is generated from the ENDF/B-VII library by NJOY and the 361-group SHEM structure is employed. The resonance calculation module is developed based on sub-group method. The transport solver is Auto-MOC code, which is a self-developed code based on the Method of Characteristic and the customization of AutoCAD software. The whole code is well organized in a modular software structure. Some numerical results during the validation of the code demonstrate that this code has a good precision and a high efficiency. (authors)

  11. Fuel cycle optimization of thorium and uranium fueled PWR systems

    E-Print Network [OSTI]

    Garel, Keith Courtnay

    1977-01-01T23:59:59.000Z

    The burnup neutronics of uniform PWR lattices are examined with respect to reduction of uranium ore requirements with an emphasis on variation of the fuel-to-moderator ratio

  12. RIS-M-2264 CONSTRUCTION OF PWR NUCLEAR CROSS SECTIONS FOR TRANSIENT

    E-Print Network [OSTI]

    RIS-M-2264 CONSTRUCTION OF PWR NUCLEAR CROSS SECTIONS FOR TRANSIENT CALCULATIONS. TEST OF THE ANTI recent Westinghouse designs, representing two different PWR reactor cores, are calculated as functions oi; COMPUTER CALCULATIONS; COUPLING CONSTANTS; CROSS SECTIONS; POWER DISTRIBUTION; PWR TYPE REACTORS

  13. A Comparison Between Model Reduction and Controller Reduction: Application to a PWR Nuclear Planty

    E-Print Network [OSTI]

    Gevers, Michel

    A Comparison Between Model Reduction and Controller Reduction: Application to a PWR Nuclear Planty model reduction with controller reduction for the same PWR system. We show that closed-loop techniques to the design of a low-order con- troller for a realistic model of order 42 of a Pressurized Water Reactor (PWR

  14. PWR fuel performance and future trend in Japan

    SciTech Connect (OSTI)

    Kondo, Y.

    1988-01-01T23:59:59.000Z

    Since the first PWR power plant Mihama Unit 1 initiated its commercial operation in 1970, Japanese utilities and manufacturers have expended much of their resources and efforts to improve PWR technology. The results are already seen in significantly improved performance of 16 PWR plants now in operation. Mitsubishi Heavy Industries Ltd. (MHI) has been supplying them with nuclear fuel assemblies, which are over 5700. As the reliability of the current design fuel has been achieved, the direction of RandD on nuclear fuel has changed to make nuclear power more competitive to the other power generation methods. The most important RandD targets are the burnup extension, Gd contained fuel, utilization and the load follow capability.

  15. Leak before break application in French PWR plants under operation

    SciTech Connect (OSTI)

    Faidy, C. [EDF SEPTEN, Villeurbanne (France)

    1997-04-01T23:59:59.000Z

    Practical applications of the leak-before break concept are presently limited in French Pressurized Water Reactors (PWR) compared to Fast Breeder Reactors. Neithertheless, different fracture mechanic demonstrations have been done on different primary, auxiliary and secondary PWR piping systems based on similar requirements that the American NUREG 1061 specifications. The consequences of the success in different demonstrations are still in discussion to be included in the global safety assessment of the plants, such as the consequences on in-service inspections, leak detection systems, support optimization,.... A large research and development program, realized in different co-operative agreements, completes the general approach.

  16. Analysis of PWR RCS Injection Strategy During Severe Accident

    SciTech Connect (OSTI)

    Wang, S.-J. [Institute of Nuclear Energy Research, Taiwan (China); Chiang, K.-S. [Institute of Nuclear Energy Research, Taiwan (China); Chiang, S.-C. [Taiwan Power Company, Taiwan (China)

    2004-05-15T23:59:59.000Z

    Reactor coolant system (RCS) injection is an important strategy for severe accident management of a pressurized water reactor (PWR) system. Maanshan is a typical Westinghouse PWR nuclear power plant (NPP) with large, dry containment. The severe accident management guideline (SAMG) of Maanshan NPP is developed based on the Westinghouse Owners Group (WOG) SAMG.The purpose of this work is to analyze the RCS injection strategy of PWR system in an overheated core condition. Power is assumed recovered as the vessel water level drops to the bottom of active fuel. The Modular Accident Analysis Program version 4.0.4 (MAAP4) code is chosen as a tool for analysis. A postulated station blackout sequence for Maanshan NPP is cited as a reference case for this analysis. The hot leg creep rupture occurs during the mitigation action with immediate injection after power recovery according to WOG SAMG, which is not desired. This phenomenon is not considered while developing the WOG SAMG. Two other RCS injection methods are analyzed by using MAAP4. The RCS injection strategy is modified in the Maanshan SAMG. These results can be applied for typical PWR NPPs.

  17. Effects of Burnable Absorbers on PWR Spent Nuclear Fuel

    SciTech Connect (OSTI)

    P.M. O'Leary; Dr. M.L. Pitts

    2000-08-21T23:59:59.000Z

    Burnup credit is an ongoing issue in designing and licensing transportation and storage casks for spent nuclear fuel (SNF). To address this issue, in July 1999, the U.S. Nuclear Regulatory Commission (NRC), Spent Fuel Project Office, issued Interim Staff Guidance-8 (ISG-8), Revision 1 allowing limited burnup credit for pressurized water reactor (PWR) spent nuclear fuel (SNF) to be used in transport and storage casks. However, one of the key limitations for a licensing basis analysis as stipulated in ISG-8, Revision 1 is that ''burnup credit is restricted to intact fuel assemblies that have not used burnable absorbers''. Because many PWR fuel designs have incorporated burnable-absorber rods for more than twenty years, this restriction places an unnecessary burden on the commercial nuclear power industry. This paper summarizes the effects of in-reactor irradiation on the isotopic inventory of PWR fuels containing different types of integral burnable absorbers (BAs). The work presented is illustrative and intended to represent typical magnitudes of the reactivity effects from depleting PWR fuel with different types of burnable absorbers.

  18. Condensate polishing guidelines for PWR and BWR plants

    SciTech Connect (OSTI)

    Robbins, P.; Crinigan, P.; Graham, B.; Kohlmann, R.; Crosby, C.; Seager, J.; Bosold, R.; Gillen, J.; Kristensen, J.; McKeen, A.; Jones, V.; Sawochka, S.; Siegwarth, D.; Keeling, D.; Polidoroff, T.; Morgan, D.; Rickertsen, D.; Dyson, A.; Mills, W.; Coleman, L.

    1993-03-01T23:59:59.000Z

    Under EPRI sponsorship, an industry committee, similar in form and operation to other guideline committees, was created to develop Condensate Polishing Guidelines for both PWR and BWR systems. The committee reviewed the available utility and water treatment industry experience on system design and performance and incorporated operational and state-of-the-art information into document. These guidelines help utilities to optimize present condensate polisher designs as well as be a resource for retrofits or new construction. These guidelines present information that has not previously been presented in any consensus industry document. The committee generated guidelines that cover both deep bed and powdered resin systems as an integral part of the chemistry of PWR and BWR plants. The guidelines are separated into sections that deal with the basis for condensate polishing, system design, resin design and application, data management and performance and management responsibilities.

  19. Design study of long-life PWR using thorium cycle

    SciTech Connect (OSTI)

    Subkhi, Moh. Nurul; Su'ud, Zaki; Waris, Abdul [Physics.Dept., Bandung Institute of Technology.Ganesha 10, Bandung (Indonesia)

    2012-06-06T23:59:59.000Z

    Design study of long-life Pressurized Water Reactor (PWR) using thorium cycle has been performed. Thorium cycle in general has higher conversion ratio in the thermal spectrum domain than uranium cycle. Cell calculation, Burn-up and multigroup diffusion calculation was performed by PIJ-CITATION-SRAC code using libraries based on JENDL 3.2. The neutronic analysis result of infinite cell calculation shows that {sup 231}Pa better than {sup 237}Np as burnable poisons in thorium fuel system. Thorium oxide system with 8%{sup 233}U enrichment and 7.6{approx} 8%{sup 231}Pa is the most suitable fuel for small-long life PWR core because it gives reactivity swing less than 1%{Delta}k/k and longer burn up period (more than 20 year). By using this result, small long-life PWR core can be designed for long time operation with reduced excess reactivity as low as 0.53%{Delta}k/k and reduced power peaking during its operation.

  20. Central Montana E Pwr Coop Inc | 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 Siteof EnergyInnovation inOpenadd: China DatangCentral ElCentral Montana E Pwr Coop Inc

  1. Northwest Rural Pub Pwr Dist | 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 |JilinLuOpenNorth AmericaNorthwest Rural Pub Pwr Dist Jump to:

  2. Pearl River Valley El Pwr Assn | 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)Pearl River Valley El Pwr Assn Jump to:

  3. Arizona Electric Pwr Coop Inc | 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 EditCalifornia: Energy Resources JumpAnaconda,AnzaArcade,theElectric Pwr Coop Inc Jump

  4. Cuming County Public Pwr Dist | 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 beingZealand JumpConceptual Model, clickInformationNew|CoreCpWing County,ElectricCuming County Public Pwr Dist

  5. Development and Application of Laser Peening System for PWR Power Plants

    SciTech Connect (OSTI)

    Masaki Yoda; Itaru Chida; Satoshi Okada; Makoto Ochiai; Yuji Sano; Naruhiko Mukai; Gaku Komotori; Ryoichi Saeki [Toshiba Corporation (Japan); Toshimitsu Takagi; Masanori Sugihara; Hirokata Yoriki [Shikoku Electric Co., Inc. (Japan)

    2006-07-01T23:59:59.000Z

    Laser peening is a process to improve residual stress from tensile to compressive in surface layer of materials by irradiating high-power laser pulses on the material in water. Toshiba has developed a laser peening system composed of Q-switched Nd:YAG laser oscillators, laser delivery equipment and underwater remote handling equipment. We have applied the system for Japanese operating BWR power plants as a preventive maintenance measure for stress corrosion cracking (SCC) on reactor internals like core shrouds or control rod drive (CRD) penetrations since 1999. As for PWRs, alloy 600 or 182 can be susceptible to primary water stress corrosion cracking (PWSCC), and some cracks or leakages caused by the PWSCC have been discovered on penetrations of reactor vessel heads (RVHs), reactor bottom-mounted instrumentation (BMI) nozzles, and others. Taking measures to meet the unconformity of the RVH penetrations, RVHs themselves have been replaced in many PWRs. On the other hand, it's too time-consuming and expensive to replace BMI nozzles, therefore, any other convenient and less expensive measures are required instead of the replacement. In Toshiba, we carried out various tests for laser-peened nickel base alloys and confirmed the effectiveness of laser peening as a preventive maintenance measure for PWSCC. We have developed a laser peening system for PWRs as well after the one for BWRs, and applied it for BMI nozzles, core deluge line nozzles and primary water inlet nozzles of Ikata Unit 1 and 2 of Shikoku Electric Power Company since 2004, which are Japanese operating PWR power plants. In this system, laser oscillators and control devices were packed into two containers placed on the operating floor inside the reactor containment vessel. Laser pulses were delivered through twin optical fibers and irradiated on two portions in parallel to reduce operation time. For BMI nozzles, we developed a tiny irradiation head for small tubes and we peened the inner surface around J-groove welds after laser ultrasonic testing (LUT) as the remote inspection, and we peened the outer surface and the weld for Ikata Unit 2 supplementary. For core deluge line nozzles and primary water inlet nozzles, we peened the inner surface of the dissimilar metal welding, which is of nickel base alloy, joining a safe end and a low alloy metal nozzle. In this paper, the development and the actual application of the laser peening system for PWR power plants will be described. (authors)

  6. Recent advances in analysis of PWR containment bypass accidents

    SciTech Connect (OSTI)

    Warman, E.A.; Metcalf, J.E.; Donahue, M.L. (Stone and Webster Engineering Corp., Boston, MA (United States))

    1991-01-01T23:59:59.000Z

    The Reactor Safety Study identified and quantified the contribution to off-site radiological risks of accident sequences at pressurized water reactors (PWRs) in which the release of fission products may be released by bypassing the containment building. These so-called bypass accidents were also referred to as interfacing systems loss-of-coolant accidents (LOCAs) or Event 5 sequences due to the postulated failure of valves separating the high-pressure reactor coolant system (RCS) from low-pressure piping located outside containment. Containment bypass sequence risks constitute a large fraction of the total pressurized water reactor (PWR) in NUREG-1150 in large part because estimates of competing risks from early containment failures have been greatly reduced since WASH-1400. Rigorous analyses of both SGTR and V sequence bypass sequences result in reductions in fission product release to such an extent that in-containment sequences are expected to dominate PWR risks at levels substantially lower than reported in NUREG-1150. It is important that these findings be confirmed by other investigators, particularly in light of the NRC's ongoing study of the frequency of occurrence of interfacing systems. LOCAs based on extensive investigations at operating plants. Progress in this latter effort should be matched by progress in the knowledge and understanding of the progression of bypass sequences, once initiated.

  7. Gamma and Neutron Radiolysis in the 21-PWR Waste Package

    SciTech Connect (OSTI)

    J.S. Tang

    2001-05-03T23:59:59.000Z

    The objective of this calculation is to compute gamma and neutron dose rates in order to determine the maximum radiolytic production of nitric acid and other chemical species inside the 21-PWR (pressurized-water reactor) waste package (WP). The scope of this calculation is limited to the time period between 5,000 and 100,000 years after emplacement. The information provided by the sketches attached to this calculation is that of the potential design for the type of WP considered in this calculation. The results of this calculation will be used to evaluate nitric acid corrosion of fuel cladding from radiolysis in the 21-PWR WP. This calculation was performed in accordance with the Technical Work Plan for: Waste Package Design Description for LA (Civilian Radioactive Waste Management System (CRWMS) Management and Operating Contractor (M&O) 2000a). AP-3.124, Calculations, is used to perform the calculation and develop the document. This calculation is associated with the total system performance assessment (TSPA) of which the spent fuel cladding integrity is to be evaluated.

  8. Fracture mechanics evaluation for at typical PWR primary coolant pipe

    SciTech Connect (OSTI)

    Tanaka, T. [Kansai Electric Power Company, Osaka (Japan); Shimizu, S.; Ogata, Y. [Mitsubishi Heavy Industries, Ltd., Kobe (Japan)

    1997-04-01T23:59:59.000Z

    For the primary coolant piping of PWRs in Japan, cast duplex stainless steel which is excellent in terms of strength, corrosion resistance, and weldability has conventionally been used. The cast duplex stainless steel contains the ferrite phase in the austenite matrix and thermal aging after long term service is known to change its material characteristics. It is considered appropriate to apply the methodology of elastic plastic fracture mechanics for an evaluation of the integrity of the primary coolant piping after thermal aging. Therefore we evaluated the integrity of the primary coolant piping for an initial PWR plant in Japan by means of elastic plastic fracture mechanics. The evaluation results show that the crack will not grow into an unstable fracture and the integrity of the piping will be secured, even when such through wall crack length is assumed to equal the fatigue crack growth length for a service period of up to 60 years.

  9. SENSITIVITY STUDIES FOR THE PWR ROD EJECTION ACCIDENT

    SciTech Connect (OSTI)

    DIAMOND,D.J.; YANG,C.Y.; ARONSON,A.L.

    1999-11-14T23:59:59.000Z

    The objective of this study was to understand the uncertainty in fuel enthalpy calculated for the rod ejection accident (REA) in a pressurized water reactor (PWR). This is to help the US Nuclear Regulatory Commission in making judgments about acceptance criteria for the REA when high burnup fuel is used and for assessing the validity of licensee methods for calculating the REA. The approach is twofold. Sensitivity studies were first done to determine the effect on calculated fuel enthalpy of uncertainties in the important parameters which determine the outcome of the REA. The second step, which will be carried out at a later date, is to use the sensitivity to estimate the random error in the fuel enthalpy due to random errors in these key parameters once the variance of these parameters is determined.

  10. WAPD-SC-545 HYDROGEN FLAMMABILITY DATA AND APPLICATION TO PWR

    Office of Scientific and Technical Information (OSTI)

    WAPD-SC-545 HYDROGEN FLAMMABILITY DATA AND APPLICATION TO PWR LOSS-OF-COOLANT ACCIDENT CONTRACT A T - I M - G E N - H BETTIS PLANT PITTSBURGH, PENNSYLVANIA Operated for the U.S....

  11. A comparison of fuzzy logic-PID control strategies for PWR pressurizer control

    SciTech Connect (OSTI)

    Kavaklioglu, K.; Ikonomopoulos, A. (Univ. of Tennessee, Knoxville (United States))

    1993-01-01T23:59:59.000Z

    This paper describes the results obtained from a comparison performed between classical proportional-integral-derivative (PID) and fuzzy logic (FL) controlling the pressure in a pressurized water reactor (PWR). The two methodologies have been tested under various transient scenarios, and their performances are evaluated with respect to robustness and on-time response to external stimuli. One of the main concerns in the safe operation of PWR is the pressure control in the primary side of the system. In order to maintain the pressure in a PWR at the desired level, the pressurizer component equipped with sprayers, heaters, and safety relief valves is used. The control strategy in a Westinghouse PWR is implemented with a PID controller that initiates either the electric heaters or the sprayers, depending on the direction of the coolant pressure deviation from the setpoint.

  12. Bias identification in PWR pressurizer instrumentation using the generalized liklihood-ratio technique

    SciTech Connect (OSTI)

    Tylee, J.L.

    1981-01-01T23:59:59.000Z

    A method for detecting and identifying biases in the pressure and level sensors of a pressurized water reactor (PWR) pressurizer is described. The generalized likelihood ratio (GLR) technique performs statistical tests on the innovations sequence of a Kalman filter state estimator and is capable of determining when a bias appears, in what sensor the bias exists, and estimating the bias magnitude. Simulation results using a second-order linear, discrete PWR pressurizer model demonstrate the capabilities of the GLR method.

  13. Effect of component aging on PWR control rod drive systems

    SciTech Connect (OSTI)

    Grove, E.; Gunther, W.; Sullivan, K.

    1992-01-01T23:59:59.000Z

    An aging assessment of PWR control rod drive (CRD) systems has been completed as part of the US NRC Nuclear Plant Aging Research (NPAR) Program. The design, construction, maintenance, and operation of the Babcock Wilcox (B W), Combustion Engineering (CE), and Westinghouse (W) systems were evaluated to determine the potential for degradation as each system ages. Operating experience data were evaluated to identify the predominant failure modes, causes, and effects. This, coupled with an assessment of the materials of construction and operating environment, demonstrate that each design is subject to degradation, which if left unchecked, could affect its safety function as the plant ages. An industry survey, conducted with the assistance of EPRI and NUMARC, identified current CRD system maintenance and inspection practices. The results of this survey indicate that some plants have performed system modifications, replaced components, or augmented existing preventive maintenance practices in response to system aging. The survey results also supported the operating experience data, which concluded that the timely replacement of degraded components, prior to failure, was not always possible using existing condition monitoring techniques. The recommendations presented in this study also include a discussion of more advanced monitoring techniques, which provide trendable results capable of detecting aging.

  14. Effect of component aging on PWR control rod drive systems

    SciTech Connect (OSTI)

    Grove, E.; Gunther, W.; Sullivan, K.

    1992-06-01T23:59:59.000Z

    An aging assessment of PWR control rod drive (CRD) systems has been completed as part of the US NRC Nuclear Plant Aging Research (NPAR) Program. The design, construction, maintenance, and operation of the Babcock & Wilcox (B & W), Combustion Engineering (CE), and Westinghouse (W) systems were evaluated to determine the potential for degradation as each system ages. Operating experience data were evaluated to identify the predominant failure modes, causes, and effects. This, coupled with an assessment of the materials of construction and operating environment, demonstrate that each design is subject to degradation, which if left unchecked, could affect its safety function as the plant ages. An industry survey, conducted with the assistance of EPRI and NUMARC, identified current CRD system maintenance and inspection practices. The results of this survey indicate that some plants have performed system modifications, replaced components, or augmented existing preventive maintenance practices in response to system aging. The survey results also supported the operating experience data, which concluded that the timely replacement of degraded components, prior to failure, was not always possible using existing condition monitoring techniques. The recommendations presented in this study also include a discussion of more advanced monitoring techniques, which provide trendable results capable of detecting aging.

  15. Automatic load follow control system for PWR plants

    SciTech Connect (OSTI)

    Nakakura, H.; Ishiguro, A.

    1987-01-01T23:59:59.000Z

    In Japan, load follow operation (daily load follow, automatic frequency control (AFC) operation, and governor free (GF) operation) of nuclear plants will be required in the near future to control grid frequency, as the ratio of nuclear plant electrical production to total grid production will increase. The AFC operation regulated power by demand from the central load dispatcher to control mainly the fringe component of the grid frequency fluctuation, and GF operation regulates power by turbine revolution or grid frequency to control mainly the cyclic component of grid frequency fluctuation. This paper deals with the automatic power distribution control system, which is important to load follow operation and possibly will be applied to pressurized water reactor (PWR) nuclear plants. The reactor control systems noted below are conventional design with some improvements for AFC/GF operation, so that the reactor operates the turbine as before: (1) rod control system (reactor power control); (2) pressurizer pressure control system; (3) pressurizer level control system; and (4) steam generator level control system.

  16. Study on Equilibrium Characteristics of Thorium-Plutonium-Minor Actinides Mixed Oxides Fuel in PWR

    SciTech Connect (OSTI)

    Waris, A.; Permana, S.; Kurniadi, R.; Su'ud, Z. [Bosscha Laboratory, Department of Physics, Nuclear Physics and Biophysics Research Group, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung (Indonesia); Sekimoto, H. [Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology (Japan)

    2010-06-22T23:59:59.000Z

    A study on characteristics of thorium-plutonium-minor actinides utilization in the pressurized water reactor (PWR) with the equilibrium burnup model has been conducted. For a comprehensive evaluation, several fuel cycles scenario have been included in the present study with the variation of moderator-to-fuel volume ratio (MFR) of PWR core design. The results obviously exhibit that the neutron spectra grow to be harder with decreasing of the MFR. Moreover, the neutron spectra also turn into harder with the rising number of confined heavy nuclides. The required {sup 233}U concentration for criticality of reactor augments with the increasing of MFR for all heavy nuclides confinement and thorium and uranium confinement in PWR.

  17. WG-MOX Fuel Zr-tube Neutron Spectrum Comparison in ATR and PWR

    SciTech Connect (OSTI)

    Gray S. Chang

    2005-02-01T23:59:59.000Z

    An experiment containing WG-MOX fuel has been designed and irradiated from 1998 to 2004 in the Advanced Test Reactor (ATR) at the Idaho National Engineering and Environmental Laboratory (INEEL). Important neutronics parameters were computed using novel Monte Carlo methods. The purpose of this summary is to compare the Weapons-Grade Mixed Oxide fuel (WG-MOX) Zr-tubes neutron spectrum in ATR and PWR. The results indicate that the Zrtubes neutron spectrum in ATR are softer than in PWR.

  18. Categorization of PWR accident sequences and guidelines for fault trees: seismic initiators

    SciTech Connect (OSTI)

    Kimura, C.Y.

    1984-09-01T23:59:59.000Z

    This study developed a set of dominant accident sequences that could be applied generically to domestic commercial PWRs as a standardized basis for a probabilistic seismic risk assessment. This was accomplished by ranking the Zion 1 accident sequences. The pertinent PWR safety systems were compared on a plant-by-plant basis to determine the applicability of the dominant accident sequences of Zion 1 to other PWR plants. The functional event trees were developed to describe the system functions that must work or not work in order for a certain accident sequence to happen, one for pipe breaks and one for transients.

  19. Maquoketa Valley Rrl Elec Coop | 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 |JilinLu an Group JumpNew Hampshire: EnergyManz AutomationMaquoketa

  20. Red River Valley Rrl Elec Assn | 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 IRaghuraji Agro Industries Pvt Ltd Jump to: navigation, searchRay County,OpenCounty, Texas:Red River Valley

  1. Harrison County Rrl Elec Coop | 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 | Open Energy Information HanergyHarney Electric Coop, IncHarrison

  2. Ris-M-2209 THE THREE-DIMENSIONAL PWR TRANSIENT CODE

    E-Print Network [OSTI]

    , REACTOR KINETICS, ROD DROP ACCIDENTS, THREE- DIMENSIONAL CALCULATIONS, TRANSIENTS. UDC 621 more or less by change. The calculation is there- fore not representative of any existing reactorRisø-M-2209 THE THREE-DIMENSIONAL PWR TRANSIENT CODE ANTI; ROD EJECTION TEST CALCULATION A

  3. Westinghouse Approach and Experience on Operating VVER (PWR)1000 I and C Modernization

    SciTech Connect (OSTI)

    Mahlab Moshe [Kozloduy Project Director, Westinghouse Electric Company (Bulgaria); Naydenov, Nayden [Kozloduy NPP Modernization Manager (Bulgaria); Sechensky, Boyan [Chief Engineer, Westinghouse Energy Systems Bulgaria (Bulgaria)

    2004-07-01T23:59:59.000Z

    The paper will describe the background, current implementation approach and experience on the largest ever modernization program on operating units VVER 1000 (PWR) at Kozloduy Nuclear Power Plant in Bulgaria. The Modernization Program itself includes more than 212 measures. Westinghouse is modernizing the major I and C Systems at VVER 1000. (authors)

  4. Reactor analysis support package (RASP). Volume 7. PWR set-point methodology. Final report

    SciTech Connect (OSTI)

    Temple, S.M.; Robbins, T.R.

    1986-09-01T23:59:59.000Z

    This report provides an overview of the basis and methodology requirements for determining Pressurized Water Reactor (PWR) technical specifications related setpoints and focuses on development of the methodology for a reload core. Additionally, the report documents the implementation and typical methods of analysis used by PWR vendors during the 1970's to develop Protection System Trip Limits (or Limiting Safety System Settings) and Limiting Conditions for Operation. The descriptions of the typical setpoint methodologies are provided for Nuclear Steam Supply Systems as designed and supplied by Babcock and Wilcox, Combustion Engineering, and Westinghouse. The description of the methods of analysis includes the discussion of the computer codes used in the setpoint methodology. Next, the report addresses the treatment of calculational and measurement uncertainties based on the extent to which such information was available for each of the three types of PWR. Finally, the major features of the setpoint methodologies are compared, and the principal effects of each particular methodology on plant operation are summarized for each of the three types of PWR.

  5. Crack growth rates of nickel alloy welds in a PWR environment.

    SciTech Connect (OSTI)

    Alexandreanu, B.; Chopra, O. K.; Shack, W. J.; Energy Technology

    2006-05-31T23:59:59.000Z

    In light water reactors (LWRs), vessel internal components made of nickel-base alloys are susceptible to environmentally assisted cracking. A better understanding of the causes and mechanisms of this cracking may permit less conservative estimates of damage accumulation and requirements on inspection intervals. A program is being conducted at Argonne National Laboratory to evaluate the resistance of Ni alloys and their welds to environmentally assisted cracking in simulated LWR coolant environments. This report presents crack growth rate (CGR) results for Alloy 182 shielded-metal-arc weld metal in a simulated pressurized water reactor (PWR) environment at 320 C. Crack growth tests were conducted on 1-T compact tension specimens with different weld orientations from both double-J and deep-groove welds. The results indicate little or no environmental enhancement of fatigue CGRs of Alloy 182 weld metal in the PWR environment. The CGRs of Alloy 182 in the PWR environment are a factor of {approx}5 higher than those of Alloy 600 in air under the same loading conditions. The stress corrosion cracking for the Alloy 182 weld is close to the average behavior of Alloy 600 in the PWR environment. The weld orientation was found to have a profound effect on the magnitude of crack growth: cracking was found to propagate faster along the dendrites than across them. The existing CGR data for Ni-alloy weld metals have been compiled and evaluated to establish the effects of key material, loading, and environmental parameters on CGRs in PWR environments. The results from the present study are compared with the existing CGR data for Ni-alloy welds to determine the relative susceptibility of the specific Ni-alloy weld to environmentally enhanced cracking.

  6. Performance evaluation of two-stage fuel cycle from SFR to PWR

    SciTech Connect (OSTI)

    Fei, T.; Hoffman, E.A.; Kim, T.K.; Taiwo, T.A. [Nuclear Engineering Division Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL (United States)

    2013-07-01T23:59:59.000Z

    One potential fuel cycle option being considered is a two-stage fuel cycle system involving the continuous recycle of transuranics in a fast reactor and the use of bred plutonium in a thermal reactor. The first stage is a Sodium-cooled Fast Reactor (SFR) fuel cycle with metallic U-TRU-Zr fuel. The SFRs need to have a breeding ratio greater than 1.0 in order to produce fissile material for use in the second stage. The second stage is a PWR fuel cycle with uranium and plutonium mixed oxide fuel based on the design and performance of the current state-of-the-art commercial PWRs with an average discharge burnup of 50 MWd/kgHM. This paper evaluates the possibility of this fuel cycle option and discusses its fuel cycle performance characteristics. The study focuses on an equilibrium stage of the fuel cycle. Results indicate that, in order to avoid a positive coolant void reactivity feedback in the stage-2 PWR, the reactor requires high quality of plutonium from the first stage and minor actinides in the discharge fuel of the PWR needs to be separated and sent back to the stage-1 SFR. The electricity-sharing ratio between the 2 stages is 87.0% (SFR) to 13.0% (PWR) for a TRU inventory ratio (the mass of TRU in the discharge fuel divided by the mass of TRU in the fresh fuel) of 1.06. A sensitivity study indicated that by increasing the TRU inventory ratio to 1.13, The electricity generation fraction of stage-2 PWR is increased to 28.9%. The two-stage fuel cycle system considered in this study was found to provide a high uranium utilization (>80%). (authors)

  7. Transient thermal analysis of PWRs by a single-pass procedure using a simplified nodal layout

    E-Print Network [OSTI]

    Liu, Jack S. H.

    1979-01-01T23:59:59.000Z

    PWR accident conditions and analysis methods have been reviewed. Limitations of the simplified method with respect to analysis of these accident conditions are drawn and two transients ( loss of coolant flow, seized rotor) ...

  8. Conceptual design study of small long-life PWR based on thorium cycle fuel

    SciTech Connect (OSTI)

    Subkhi, M. Nurul [Nuclear Physics and Biophysics Research Group, Faculty of Mathematics and Natural Science, Bandung Institute of Technology (Ganesha 10 Bandung, Indonesia) and Physics Dept., Faculty of Science and Technology, State Islamic University of Sunan Gunung (Indonesia); Su'ud, Zaki; Waris, Abdul; Permana, Sidik [Nuclear Physics and Biophysics Research Group, Faculty of Mathematics and Natural Science, Bandung Institute of Technology (Ganesha 10 Bandung) (Indonesia)

    2014-09-30T23:59:59.000Z

    A neutronic performance of small long-life Pressurized Water Reactor (PWR) using thorium cycle based fuel has been investigated. Thorium cycle which has higher conversion ratio in thermal region compared to uranium cycle produce some significant of {sup 233}U during burn up time. The cell-burn up calculations were performed by PIJ SRAC code using nuclear data library based on JENDL 3.3, while the multi-energy-group diffusion calculations were optimized in whole core cylindrical two-dimension R-Z geometry by SRAC-CITATION. this study would be introduced thorium nitride fuel system which ZIRLO is the cladding material. The optimization of 350 MWt small long life PWR result small excess reactivity and reduced power peaking during its operation.

  9. Safety analysis of B and W Standard PWR using thorium-based fuels

    SciTech Connect (OSTI)

    Uotinen, V.O.; Carroll, W.P.; Jones, H.M.; Toops, E.C.

    1980-06-01T23:59:59.000Z

    A study was performed to assess the safety and licenseability of the Babcock and Wilcox standard 205-fuel assembly PWR when it is fueled with three types of thoria-based fuels denatured (/sup 233/U//sup 238/U-Th)O/sub 2/, denatured (/sup 235//U/sup 238/U-Th)O/sub 2/, and (Th-Pu)O/sub 2/. Selected transients were analyzed using typical PWR safety analysis calculational methods. The results support the conclusion that it is feasible from a safety standpoint to utilize either of the denatured urania-thoria fuels in the standard B and W plant. In addition, it appears that the use of thoria-plutonia fuels would probably also be feasible. These tentative conclusions depend on a data that is more limited than that available for UO/sub 2/ fuels.

  10. An Empirical Approach to Bounding the Axial Reactivity Effects of PWR Spent Nuclear Fuel

    SciTech Connect (OSTI)

    P. M. O'Leary; J. M. Scaglione

    2001-04-04T23:59:59.000Z

    One of the significant issues yet to be resolved for using burnup credit (BUC) for spent nuclear fuel (SNF) is establishing a set of depletion parameters that produce an adequately conservative representation of the fuel's isotopic inventory. Depletion parameters (such as local power, fuel temperature, moderator temperature, burnable poison rod history, and soluble boron concentration) affect the isotopic inventory of fuel that is depleted in a pressurized water reactor (PWR). However, obtaining the detailed operating histories needed to model all PWR fuel assemblies to which BUC would be applied is an onerous and costly task. Simplifications therefore have been suggested that could lead to using ''bounding'' depletion parameters that could be broadly applied to different fuel assemblies. This paper presents a method for determining a set of bounding depletion parameters for use in criticality analyses for SNF.

  11. FLASH predictions of the MB-2 steam line break tests

    SciTech Connect (OSTI)

    Lincoln, F.W.; Coffield, R.D.; Johnson, E.G.

    1992-12-31T23:59:59.000Z

    If a main steam line from a pressurized water reactor (PWR) steam generator were to rupture, the effect would be a depressurization of the secondary side and a consequential overcooling transient on the primary side. Analyses must accurately predict the effects of the rapid cooldown of the reactor vessel coolant on positive nuclear-kinetic reactivity feedback to the core plus thermal shock to the reactor vessel and other primary system components. Many early studies of the steam line break (SLB) transient made extremely conservative assumptions to maximize the primary to secondary heat transfer which in turn maximized the reactor vessel cooldown rate. Among the more significant of these assumptions was that flow from the break was pure steam and that the tube bundle remained covered until the secondary mass inventory was significantly reduced. The Model F commercial PWR steam generator testing performed in the Model Boiler No. 2 (MB-2) facility located at the Westinghouse Engineering Test Facility in Tampa, Florida provided data to better qualify the actual variation in these key parameters. A conclusion of this analysis is that the MB-2 steam line break data base is accurate and of sufficient detail to provide a valuable basis for making comparisons relative to code predictions. Results obtained using the FLASH transient safety analysis code were found to be in excellent agreement with the data.

  12. MELCOR model for an experimental 17x17 spent fuel PWR assembly.

    SciTech Connect (OSTI)

    Cardoni, Jeffrey

    2010-11-01T23:59:59.000Z

    A MELCOR model has been developed to simulate a pressurized water reactor (PWR) 17 x 17 assembly in a spent fuel pool rack cell undergoing severe accident conditions. To the extent possible, the MELCOR model reflects the actual geometry, materials, and masses present in the experimental arrangement for the Sandia Fuel Project (SFP). The report presents an overview of the SFP experimental arrangement, the MELCOR model specifications, demonstration calculation results, and the input model listing.

  13. Crack growth rates and metallographic examinations of Alloy 600 and Alloy 82/182 from field components and laboratory materials tested in PWR environments.

    SciTech Connect (OSTI)

    Alexandreanu, B.; Chopra, O. K.; Shack, W. J.

    2008-05-05T23:59:59.000Z

    In light water reactors, components made of nickel-base alloys are susceptible to environmentally assisted cracking. This report summarizes the crack growth rate results and related metallography for field and laboratory-procured Alloy 600 and its weld alloys tested in pressurized water reactor (PWR) environments. The report also presents crack growth rate (CGR) results for a shielded-metal-arc weld of Alloy 182 in a simulated PWR environment as a function of temperature between 290 C and 350 C. These data were used to determine the activation energy for crack growth in Alloy 182 welds. The tests were performed by measuring the changes in the stress corrosion CGR as the temperatures were varied during the test. The difference in electrochemical potential between the specimen and the Ni/NiO line was maintained constant at each temperature by adjusting the hydrogen overpressure on the water supply tank. The CGR data as a function of temperature yielded activation energies of 252 kJ/mol for a double-J weld and 189 kJ/mol for a deep-groove weld. These values are in good agreement with the data reported in the literature. The data reported here and those in the literature suggest that the average activation energy for Alloy 182 welds is on the order of 220-230 kJ/mol, higher than the 130 kJ/mol commonly used for Alloy 600. The consequences of using a larger value of activation energy for SCC CGR data analysis are discussed.

  14. Analysis of a Main-Steam-Line Break in Asco NPP

    SciTech Connect (OSTI)

    Cuadra, Arantzazu; Gago, Jose-Luis; Reventos, Francesc

    2004-04-15T23:59:59.000Z

    Culminating in the participation of the Universitat Politecnica de Catalunya in the Organization for Economic Cooperation and Development-Committee on the Safety of Nuclear Installations/Nuclear Science Committee pressurized water reactor (PWR) main-steam-line-break (MSLB) benchmark, we present the analysis with RELAP/PARCS of a double-ended MSLB assumed to occur in the Asco nuclear power plant (NPP). This Spanish NPP, a two-unit 1000-MW(electric) PWR plant of Westinghouse design, has been in normal operation since 1983. The utility uses the RELAP model developed by its analysts to study transients that occurred (or postulated), following its own procedures, giving response to operation-related issues, as well as serving licensing and training purposes. The model is well validated. The present study tests the RELAP/PARCS model of the Asco NPP and, in particular, tests the coupling between the neutronics and the thermal hydraulics; its focus is not licensing or validation.

  15. RELAP-7 Level 2 Milestone Report: Demonstration of a Steady State Single Phase PWR Simulation with RELAP-7

    SciTech Connect (OSTI)

    David Andrs; Ray Berry; Derek Gaston; Richard Martineau; John Peterson; Hongbin Zhang; Haihua Zhao; Ling Zou

    2012-05-01T23:59:59.000Z

    The document contains the simulation results of a steady state model PWR problem with the RELAP-7 code. The RELAP-7 code is the next generation nuclear reactor system safety analysis code being developed at Idaho National Laboratory (INL). The code is based on INL's modern scientific software development framework - MOOSE (Multi-Physics Object-Oriented Simulation Environment). This report summarizes the initial results of simulating a model steady-state single phase PWR problem using the current version of the RELAP-7 code. The major purpose of this demonstration simulation is to show that RELAP-7 code can be rapidly developed to simulate single-phase reactor problems. RELAP-7 is a new project started on October 1st, 2011. It will become the main reactor systems simulation toolkit for RISMC (Risk Informed Safety Margin Characterization) and the next generation tool in the RELAP reactor safety/systems analysis application series (the replacement for RELAP5). The key to the success of RELAP-7 is the simultaneous advancement of physical models, numerical methods, and software design while maintaining a solid user perspective. Physical models include both PDEs (Partial Differential Equations) and ODEs (Ordinary Differential Equations) and experimental based closure models. RELAP-7 will eventually utilize well posed governing equations for multiphase flow, which can be strictly verified. Closure models used in RELAP5 and newly developed models will be reviewed and selected to reflect the progress made during the past three decades. RELAP-7 uses modern numerical methods, which allow implicit time integration, higher order schemes in both time and space, and strongly coupled multi-physics simulations. RELAP-7 is written with object oriented programming language C++. Its development follows modern software design paradigms. The code is easy to read, develop, maintain, and couple with other codes. Most importantly, the modern software design allows the RELAP-7 code to evolve with time. RELAP-7 is a MOOSE-based application. MOOSE (Multiphysics Object-Oriented Simulation Environment) is a framework for solving computational engineering problems in a well-planned, managed, and coordinated way. By leveraging millions of lines of open source software packages, such as PETSC (a nonlinear solver developed at Argonne National Laboratory) and LibMesh (a Finite Element Analysis package developed at University of Texas), MOOSE significantly reduces the expense and time required to develop new applications. Numerical integration methods and mesh management for parallel computation are provided by MOOSE. Therefore RELAP-7 code developers only need to focus on physics and user experiences. By using the MOOSE development environment, RELAP-7 code is developed by following the same modern software design paradigms used for other MOOSE development efforts. There are currently over 20 different MOOSE based applications ranging from 3-D transient neutron transport, detailed 3-D transient fuel performance analysis, to long-term material aging. Multi-physics and multiple dimensional analyses capabilities can be obtained by coupling RELAP-7 and other MOOSE based applications and by leveraging with capabilities developed by other DOE programs. This allows restricting the focus of RELAP-7 to systems analysis-type simulations and gives priority to retain and significantly extend RELAP5's capabilities.

  16. Application of LBB to high energy piping systems in operating PWR

    SciTech Connect (OSTI)

    Swamy, S.A.; Bhowmick, D.C. [Westinghouse Nuclear Technology Division, Pittsburgh, PA (United States)

    1997-04-01T23:59:59.000Z

    The amendment to General Design Criterion 4 allows exclusion, from the design basis, of dynamic effects associated with high energy pipe rupture by application of leak-before-break (LBB) technology. This new approach has resulted in substantial financial savings to utilities when applied to the Pressurized Water Reactor (PWR) primary loop piping and auxiliary piping systems made of stainless steel material. To date majority of applications pertain to piping systems in operating plants. Various steps of evaluation associated with the LBB application to an operating plant are described in this paper.

  17. Nuclear data uncertainties by the PWR MOX/UO{sub 2} core rod ejection benchmark

    SciTech Connect (OSTI)

    Pasichnyk, I.; Klein, M.; Velkov, K.; Zwermann, W.; Pautz, A. [Boltzmannstr. 14, D-85748 Garching b. Muenchen (Germany)

    2012-07-01T23:59:59.000Z

    Rod ejection transient of the OECD/NEA and U.S. NRC PWR MOX/UO{sub 2} core benchmark is considered under the influence of nuclear data uncertainties. Using the GRS uncertainty and sensitivity software package XSUSA the propagation of the uncertainties in nuclear data up to the transient calculations are considered. A statistically representative set of transient calculations is analyzed and both integral as well as local output quantities are compared with the benchmark results of different participants. It is shown that the uncertainties in nuclear data play a crucial role in the interpretation of the results of the simulation. (authors)

  18. MELCOR analyses of severe accident scenarios in Oconee, a B W PWR plant

    SciTech Connect (OSTI)

    Madni, I.K.; Nimnual, S. (Brookhaven National Lab., Upton, NY (United States)); Foulds, R. (Nuclear Regulatory Commission, Washington, DC (United States))

    1993-01-01T23:59:59.000Z

    This paper presents the results and insights gained from MELCOR analyses of two severe accident scenarios, a Loss of Coolant Accident (LOCA) and a Station Blackout (TMLB) in Oconee, a Babcock Wilcox (B W) designed PWR with a large dry containment, and comparisons with Source Term Code Package (STCP) calculations of the same sequences. Results include predicted timing of key events, thermal-hydraulic response in the reactor coolant system and containment, and environmental releases of fission products. The paper also explores the impact of varying concrete type, vessel failure temperature, and break location on the accident progression, containment pressurization, and environmental releases of radionuclides.

  19. MELCOR analyses of severe accident scenarios in Oconee, a B&W PWR plant

    SciTech Connect (OSTI)

    Madni, I.K.; Nimnual, S. [Brookhaven National Lab., Upton, NY (United States); Foulds, R. [Nuclear Regulatory Commission, Washington, DC (United States)

    1993-03-01T23:59:59.000Z

    This paper presents the results and insights gained from MELCOR analyses of two severe accident scenarios, a Loss of Coolant Accident (LOCA) and a Station Blackout (TMLB) in Oconee, a Babcock & Wilcox (B&W) designed PWR with a large dry containment, and comparisons with Source Term Code Package (STCP) calculations of the same sequences. Results include predicted timing of key events, thermal-hydraulic response in the reactor coolant system and containment, and environmental releases of fission products. The paper also explores the impact of varying concrete type, vessel failure temperature, and break location on the accident progression, containment pressurization, and environmental releases of radionuclides.

  20. Secondary Startup Neutron Sources as a Source of Tritium in a Pressurized Water Reactor (PWR) Reactor Coolant System (RCS)

    SciTech Connect (OSTI)

    Shaver, Mark W.; Lanning, Donald D.

    2010-02-01T23:59:59.000Z

    The hypothesis of this paper is that the Zircaloy clad fuel source is minimal and that secondary startup neutron sources are the significant contributors of the tritium in the RCS that was previously assigned to release from fuel. Currently there are large uncertainties in the attribution of tritium in a Pressurized Water Reactor (PWR) Reactor Coolant System (RCS). The measured amount of tritium in the coolant cannot be separated out empirically into its individual sources. Therefore, to quantify individual contributors, all sources of tritium in the RCS of a PWR must be understood theoretically and verified by the sum of the individual components equaling the measured values.

  1. Application of the MELCOR code to design basis PWR large dry containment analysis.

    SciTech Connect (OSTI)

    Phillips, Jesse; Notafrancesco, Allen (USNRC, Office of Nuclear Regulatory Research, Rockville, MD); Tills, Jack Lee (Jack Tills & Associates, Inc., Sandia Park, NM)

    2009-05-01T23:59:59.000Z

    The MELCOR computer code has been developed by Sandia National Laboratories under USNRC sponsorship to provide capability for independently auditing analyses submitted by reactor manufactures and utilities. MELCOR is a fully integrated code (encompassing the reactor coolant system and the containment building) that models the progression of postulated accidents in light water reactor power plants. To assess the adequacy of containment thermal-hydraulic modeling incorporated in the MELCOR code for application to PWR large dry containments, several selected demonstration designs were analyzed. This report documents MELCOR code demonstration calculations performed for postulated design basis accident (DBA) analysis (LOCA and MSLB) inside containment, which are compared to other code results. The key processes when analyzing the containment loads inside PWR large dry containments are (1) expansion and transport of high mass/energy releases, (2) heat and mass transfer to structural passive heat sinks, and (3) containment pressure reduction due to engineered safety features. A code-to-code benchmarking for DBA events showed that MELCOR predictions of maximum containment loads were equivalent to similar predictions using a qualified containment code known as CONTAIN. This equivalency was found to apply for both single- and multi-cell containment models.

  2. Development of a new lattice physics code robin for PWR application

    SciTech Connect (OSTI)

    Zhang, S.; Chen, G. [Shanghai NuStar Nuclear Power Technology Co., Ltd., 81 South Qinzhou Road, Shanghai 200235 (China)

    2013-07-01T23:59:59.000Z

    This paper presents a description of methodologies and preliminary verification results of a new lattice physics code ROBIN, being developed for PWR application at Shanghai NuStar Nuclear Power Technology Co., Ltd. The methods used in ROBIN to fulfill various tasks of lattice physics analysis are an integration of historical methods and new methods that came into being very recently. Not only these methods like equivalence theory for resonance treatment and method of characteristics for neutron transport calculation are adopted, as they are applied in many of today's production-level LWR lattice codes, but also very useful new methods like the enhanced neutron current method for Dancoff correction in large and complicated geometry and the log linear rate constant power depletion method for Gd-bearing fuel are implemented in the code. A small sample of verification results are provided to illustrate the type of accuracy achievable using ROBIN. It is demonstrated that ROBIN is capable of satisfying most of the needs for PWR lattice analysis and has the potential to become a production quality code in the future. (authors)

  3. Bi-content Gadolinia as Burnable Absorber in PWR to Improve the Reactor Core Behaviour

    SciTech Connect (OSTI)

    Zheng, S. [AREVA, AREVA NP Fuel Sector, 10, Rue Juliette Recamier 69456 Lyon cedex (France)

    2007-07-01T23:59:59.000Z

    The gadolinia product is one of the standard burnable absorbers used in the PWR long and low leakage fuel cycle in order to control the radial power distribution and to hold down the initial core reactivity. This product presents a large number of advantages such as the high efficiency with only a small number of gadolinia-bearing rods, the easy adjustment between the number and the content of the gadolinia-bearing rods according to the cycle length need and the initial reactivity hold-down, no increasing of boron concentration versus cycle depletion, no additional increasing of internal pressure in poisoned rods, very low additional manufacture cost. On the other hand, some unfavourable phenomena are also observed during the utilization of the gadolinia: amplification of the asymmetrical power distribution and more negative axial offset. Based on the correlation between the gadolinia burnout and its content, the use of gadolinia bi-content will improve the parameters indicated here above. The gadolinia bi-content have been used in BWR for more than 20 years. In this paper, the comparison of the main reactor core physical parameters in PWR, calculated with the AREVA NP standard neutronic code package SCIENCE, is made by using the mono- and bi-content of the gadolinia products in the same fuel assembly. The results show that the asymmetrical axial and azimuthal power distribution can be improved in the case of the bi-content gadolinia product. (authors)

  4. Investigation of optimal reactor control for a load-following PWR

    SciTech Connect (OSTI)

    Yim, M.S.

    1987-01-01T23:59:59.000Z

    Characteristics of optimal load-follow control of PWR plants are investigated in this study. A simple system model that describes main features of physical processes in the system was developed. The system model includes core neutronics with all the spatial dependent feedback effects, Xe-I dynamics, core thermal balances, primary-loop thermal balances, and steam-generator dynamic responses to turbine load changes. An optimal control problem that describes power-level control and power-distribution control problem together and considers all the important system operation limits as hard inquality constraints was formulated. The full-length control rod bank positions, part-length control rod positions, and boron concentration changes were modeled as control variables and turbine load variations were used as the forcing variable. Because modern PWR operating policy is to leave the part-length rods uninserted, the part-length rods were not used as a control variable in the optimal control calculations. The optimal control problem was converted to unconstrained nonlinear optimization problem by using the discretization approximation and the penalty function technique. The converted problem was solved by the nonlinear Gauss-Newton method which showed superior performance over all of the other tested optimization methods.

  5. Validation of the new code package APOLLO2.8 for accurate PWR neutronics calculations

    SciTech Connect (OSTI)

    Santamarina, A.; Bernard, D.; Blaise, P.; Leconte, P.; Palau, J. M.; Roque, B.; Vaglio, C.; Vidal, J. F. [Commissariat a l'Energie Atomique et aux Energies Alternatives, CEA, DEN, DER, SPRC, Cadarache, F-13108 Saint-Paul-Lez-Durance (France)

    2013-07-01T23:59:59.000Z

    This paper summarizes the Qualification work performed to demonstrate the accuracy of the new APOLLO2.S/SHEM-MOC package based on JEFF3.1.1 nuclear data file for the prediction of PWR neutronics parameters. This experimental validation is based on PWR mock-up critical experiments performed in the EOLE/MINERVE zero-power reactors and on P.I. Es on spent fuel assemblies from the French PWRs. The Calculation-Experiment comparison for the main design parameters is presented: reactivity of UOX and MOX lattices, depletion calculation and fuel inventory, reactivity loss with burnup, pin-by-pin power maps, Doppler coefficient, Moderator Temperature Coefficient, Void coefficient, UO{sub 2}-Gd{sub 2}O{sub 3} poisoning worth, Efficiency of Ag-In-Cd and B4C control rods, Reflector Saving for both standard 2-cm baffle and GEN3 advanced thick SS reflector. From this qualification process, calculation biases and associated uncertainties are derived. This code package APOLLO2.8 is already implemented in the ARCADIA new AREVA calculation chain for core physics and is currently under implementation in the future neutronics package of the French utility Electricite de France. (authors)

  6. Non-Linear Dynamics Analysis of a PWR with Up-to-date Fuel Design

    SciTech Connect (OSTI)

    Riverola Gurruchaga, Javier [ENUSA Industrias Avanzadas S.A., Santiago Rusinol 12, 28040 Madrid (Spain)

    2007-07-01T23:59:59.000Z

    The Lyapunov stability theorems are applied to a simplified system of non-linear differential equations representative of a current 3 loop /12 feet contemporary PWR (Generation II) with up-to-date 17x17 lattice fuel design. The one-speed non-linear point kinetics model with six delayed neutron groups and lumped parameter heat transfer equations in the fuel rod and coolant along with a reactivity function with Doppler and moderator feedback effects is considered. First, local asymptotic stability is demonstrated at a variety of equilibrium state-points ranging from start-up to 150% nominal power. Then, a Lyapunov V function is found with the mathematical condition for sign definiteness and the stability region of attraction around the equilibrium HFP state is obtained. This study is complemented with the application of the Welton criterion for non linear kinetics and linear feedback in the frequency domain. As expected and consistently with Reactor Physics theory and experience, the strong asymptotic stable trend of a PWR is confirmed again for all analyzed conditions. This method is general and adaptable to other fuel assembly designs and reactor types. (authors)

  7. 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.

  8. Seismic qualification of equipment by means of probabilistic risk assessment. [PWR

    SciTech Connect (OSTI)

    Azarm, M.A.; Farahzad, P.; Boccio, J.L.

    1982-01-01T23:59:59.000Z

    Upon the sponsorship of the Equipment Qualification Branch (EQB) of NRC, Brookhaven National Laboratory (BNL) has utilized a risk-based approach for identifying, in a generic fashion, seismically risk-sensitive equipment. It is anticipated that the conclusions drawn therefrom and the methodology employed will, in part, reconcile some of the concerns dealing with the seismic qualification of equipment in operating plants. The approach taken augments an existing sensitivity analysis, based upon the WASH-1400 Reactor Safety Study (RSS), by accounting for seismicity and component fragility with the Kennedy model and by essentially including the requisite seismic data presented in the Zion Probabilistic Safety Study (ZPSS). Parametrically adjusting the seismic-related variables and ascertaining their effects on overall plant risk, core-melt probability, accident sequence probability, etc., allows one to identify those seismically risk-sensitive systems and equipment. This paper describes the approach taken and highlights the results obtained thus far for a hypothetical pressurized water reactor (PWR).

  9. Risk analysis of highly combustible gas storage, supply, and distribution systems in PWR plants

    SciTech Connect (OSTI)

    Simion, G.P. [Science Applications International Corp., Albuquerque, NM (United States); VanHorn, R.L.; Smith, C.L.; Bickel, J.H.; Sattison, M.B. [EG and G Idaho, Inc., Idaho Falls, ID (United States); Bulmahn, K.D. [SCIENTECH, Inc., Idaho Falls, ID (United States)

    1993-06-01T23:59:59.000Z

    This report presents the evaluation of the potential safety concerns for pressurized water reactors (PWRs) identified in Generic Safety Issue 106, Piping and the Use of Highly Combustible Gases in Vital Areas. A Westinghouse four-loop PWR plant was analyzed for the risk due to the use of combustible gases (predominantly hydrogen) within the plant. The analysis evaluated an actual hydrogen distribution configuration and conducted several sensitivity studies to determine the potential variability among PWRs. The sensitivity studies were based on hydrogen and safety-related equipment configurations observed at other PWRs within the United States. Several options for improving the hydrogen distribution system design were identified and evaluated for their effect on risk and core damage frequency. A cost/benefit analysis was performed to determine whether alternatives considered were justifiable based on the safety improvement and economics of each possible improvement.

  10. The key to superior water chemistry at a PWR nuclear station

    SciTech Connect (OSTI)

    Dolan, R.; Miller, L.K.; Olejar, L.L.; Salem, E.

    1983-01-01T23:59:59.000Z

    This paper demonstrates how a condensate polishing unit can be successfully used to treat the feedwater for circulating-type pressurized water reactors (PWRs). Water chemistry at the Salem Generating Station, a two-unit, four-loop Westinghouse PWR located in New Jersey, is discussed. Topics considered include a plant description and the history of early operation, the role of constant surveillance, makeup water quality, the effect of freezing on gel-type anion exchange resin, a total organic carbon (TOC) survey, steam generator chemistry, steam generator inspection, condensate polisher operation, and management philosophy. The SEPREX condensate polishing process, in which the complete separation of the anion exchange resin from the cation exchange resin is achieved by flotation separation, is examined. It is concluded that the utilization of a condensate polishing process such as SEPREX provides the operating personnel at the plant with the necessary means to maintain the minimum desired level of contaminants within the steam generator.

  11. Hydrazine usage for corrosion control in PWR plants with powdered-resin-condensate polishers. Final report

    SciTech Connect (OSTI)

    Barkich, J.L.; Battaglia, P.J.

    1983-03-01T23:59:59.000Z

    The objective of this project was to obtain the data necessary to determine the optimum injection point and amount of hydrazine to be used for oxygen control in PWR units with condensate polishing demineralizers. An additional objective was to demonstrate that the condensate polisher can be used as a means to reduce the oxygen concentration in the condensate when a sufficient excess concentration of hydrazine (over the oxygen) concentration is carried over with the main steam into the condensers. Testing was performed at North Anna Unit 2 which employs powdered resin-type condensate polishing equipment. Testing was also scheduled to be performed at Ginna and Sequoyah Unit 1 plants; however, because of an unscheduled shutdown at Ginna and inability to control hydrazine dosage at Sequoyah, these tests were not performed.

  12. Quantitative uncertainty and sensitivity analysis of a PWR control rod ejection accident

    SciTech Connect (OSTI)

    Pasichnyk, I.; Perin, Y.; Velkov, K. [Gesellschaft flier Anlagen- und Reaktorsicherheit - GRS mbH, Boltzmannstasse 14, 85748 Garching bei Muenchen (Germany)

    2013-07-01T23:59:59.000Z

    The paper describes the results of the quantitative Uncertainty and Sensitivity (U/S) Analysis of a Rod Ejection Accident (REA) which is simulated by the coupled system code ATHLET-QUABOX/CUBBOX applying the GRS tool for U/S analysis SUSA/XSUSA. For the present study, a UOX/MOX mixed core loading based on a generic PWR is modeled. A control rod ejection is calculated for two reactor states: Hot Zero Power (HZP) and 30% of nominal power. The worst cases for the rod ejection are determined by steady-state neutronic simulations taking into account the maximum reactivity insertion in the system and the power peaking factor. For the U/S analysis 378 uncertain parameters are identified and quantified (thermal-hydraulic initial and boundary conditions, input parameters and variations of the two-group cross sections). Results for uncertainty and sensitivity analysis are presented for safety important global and local parameters. (authors)

  13. IMPACT OF FISSION PRODUCTS IMPURITY ON THE PLUTONIUM CONTENT IN PWR MOX FUELS

    SciTech Connect (OSTI)

    Gilles Youinou; Andrea Alfonsi

    2012-03-01T23:59:59.000Z

    This report presents the results of a neutronics analysis done in response to the charter IFCA-SAT-2 entitled 'Fuel impurity physics calculations'. This charter specifies that the separation of the fission products (FP) during the reprocessing of UOX spent nuclear fuel assemblies (UOX SNF) is not perfect and that, consequently, a certain amount of FP goes into the Pu stream used to fabricate PWR MOX fuel assemblies. Only non-gaseous FP have been considered (see the list of 176 isotopes considered in the calculations in Appendix 1). This mixture of Pu and FP is called PuFP. Note that, in this preliminary analysis, the FP losses are considered element-independent, i.e., for example, 1% of FP losses mean that 1% of all non-gaseous FP leak into the Pu stream.

  14. Effect of aging on the PWR Chemical and Volume Control System

    SciTech Connect (OSTI)

    Grove, E.J.; Travis, R.J.; Aggarwal, S.K. [Brookhaven National Lab., Upton, NY (United States)

    1995-06-01T23:59:59.000Z

    The PWR Chemical and Volume Control System (CVCS) is designed to provide both safety and non-safety related functions. During normal plant operation it is used to control reactor coolant chemistry, and letdown and charging flow. In many plants, the charging pumps also provide high pressure injection, emergency boration, and RCP seal injection in emergency situations. This study examines the design, materials, maintenance, operation and actual degradation experiences of the system and main sub-components to assess the potential for age degradation. A detailed review of the Nuclear Plant Reliability Data System (NPRDS) and Licensee Event Report (LER) databases for the 1988--1991 time period, together with a review of industry and NRC experience and research, indicate that age-related degradations and failures have occurred. These failures had significant effects on plant operation, including reactivity excursions, and pressurizer level transients. The majority of these component failures resulted in leakage of reactor coolant outside the containment. A representative plant of each PWR design (W, CE, and B and W) was visited to obtain specific information on system inspection, surveillance, monitoring, and inspection practices. The results of these visits indicate that adequate system maintenance and inspection is being performed. In some instances, the frequencies of inspection were increase in response to repeated failure events. A parametric study was performed to assess the effect of system aging on Core Damage Frequency (CDF). This study showed that as motor-operated valve (MOV) operating failures increased, the contribution of the High Pressure Injection to CDF also increased.

  15. Initiation stress threshold irradiation assisted stress corrosion cracking criterion assessment for core internals in PWR environment

    SciTech Connect (OSTI)

    Tanguy, Benoit; Stern, Anthony; Bossis, Philippe [CEA, DEN-DMN, Gif-sur-Yvette, (France); Pokor, Cedric [EDF les Renardieres, Moret-sur-Loing, (France)

    2012-07-01T23:59:59.000Z

    Irradiation assisted stress corrosion cracking (IASCC) is a problem of growing importance in pressurized water reactors (PWR). An understanding of the mechanism(s) of IASCC is required in order to provide guidance for the development of mitigation strategies. One of the principal reasons why the IASCC mechanism(s) has been so difficult to understand is the inseparability of the different IASCC potential contributors evolutions due to neutron irradiation. The potential contributors to IASCC in PWR primary water are: (i) radiation induced segregation (RIS) at grain boundaries, (ii) radiation induced microstructure (formation and growth of dislocations loops, voids, bubbles, phases), (iii) localized deformation under loading, (iv) irradiation creep and transmutations. While the development of some of the contributors (RIS, microstructure) with increasing doses are at least qualitatively well understood, the role of these changes on IASCC remains unclear. Parallel to fundamental understanding developments relative to IASCC, well controlled laboratory tests on neutron irradiated stainless steels are needed to assess the main mechanisms and also to establish an engineering criterion relative to the initiation of fracture due to IASCC. First part of this study describes the methodology carried out at CEA in order to provide more experimental data from constant load tests dedicated to the study of initiation of SCC on neutron irradiated stainless steel. A description of the autoclave recirculation loop dedicated to SCC tests on neutron irradiated materials is then given. This autoclave recirculation loop has been started on July 2010 with the first SCC test on an irradiated stainless steel (grade 316) performed at CEA. The main steps of the interrupted SCC tests are then described. Second part of this paper reports the partial results of the first test performed on a highly neutron irradiated material. (authors)

  16. Sensitivity of risk parameters to component unavailability in reactor safety study (PSAP/PSAB computer codes). [PWR; BWR

    SciTech Connect (OSTI)

    Azarm, M.; Farahzad, P.; Tingle, A.

    1982-06-01T23:59:59.000Z

    The Probabilistic Sensitivity Analysis for Pressurized and Boiling Water Reactors (PSAP/PSAB) codes have been developed to update the WASH-1400 conclusions. The initial effort, reported in NUREG/CR-1879 Sensitivity of Risk Parameters to Human Errors in Reactor Safety Study for a PWR, concentrated on developing a code for system sensitivity to human errors based on an expanded version of the PWR fault trees from the Reactor Safety Study (RSS). The success of that effort and the insights gained from the code's use initiated the development of the PSAP/PSAB codes. The two codes allow the user to evaluate the impact of new data and system models on the conclusions drawn in WASH-1400. They are designed to be fast running and modular so that detailed sensitivity studies can be run efficiently.

  17. SAS2H Generated Isotopic Concentrations For B&W 15X15 PWR Assembly (SCPB:N/A)

    SciTech Connect (OSTI)

    J.W. Davis

    1996-08-29T23:59:59.000Z

    This analysis is prepared by the Mined Geologic Disposal System (MGDS) Waste Package Development Department (WPDD) to provide pressurized water reactor (PWR) isotopic composition data as a function of time for use in criticality analyses. The objectives of this evaluation are to generate burnup and decay dependant isotopic inventories and to provide these inventories in a form which can easily be utilized in subsequent criticality calculations.

  18. Development of a coupling code for PWR reactor cavity radiation streaming calculation

    SciTech Connect (OSTI)

    Zheng, Z.; Wu, H.; Cao, L.; Zheng, Y.; Zhang, H.; Wang, M. [NECP Laboratory, School of Nuclear Science and Technology, Xi'an Jiaotong Univ., Xi'an Shaanxi 710049 (China)

    2012-07-01T23:59:59.000Z

    PWR reactor cavity radiation streaming is important for the safe of the personnel and equipment, thus calculation has to be performed to evaluate the neutron flux distribution around the reactor. For this calculation, the deterministic codes have difficulties in fine geometrical modeling and need huge computer resource; and the Monte Carlo codes require very long sampling time to obtain results with acceptable precision. Therefore, a coupling method has been developed to eliminate the two problems mentioned above in each code. In this study, we develop a coupling code named DORT2MCNP to link the Sn code DORT and Monte Carlo code MCNP. DORT2MCNP is used to produce a combined surface source containing top, bottom and side surface simultaneously. Because SDEF card is unsuitable for the combined surface source, we modify the SOURCE subroutine of MCNP and compile MCNP for this application. Numerical results demonstrate the correctness of the coupling code DORT2MCNP and show reasonable agreement between the coupling method and the other two codes (DORT and MCNP). (authors)

  19. Aging mechanisms in the Westinghouse PWR (Pressurized Water Reactor) Control Rod Drive system

    SciTech Connect (OSTI)

    Gunther, W.; Sullivan, K.

    1991-01-01T23:59:59.000Z

    An aging assessment of the Westinghouse Pressurized Water Reactor (PWR) Control Rod System (CRD) has been completed as part of the US NRC's Nuclear Plant Aging Research, (NPAR) Program. This study examined the design, construction, maintenance, and operation of the system to determine its potential for degradation as the plant ages. Selected results from this study are presented in this paper. The operating experience data were evaluated to identify the predominant failure modes, causes, and effects. From our evaluation of the data, coupled with an assessment of the materials of construction and the operating environment, we conclude that the Westinghouse CRD system is subject to degradation which, if unchecked, could affect its safety function as a plant ages. Ways to detect and mitigate the effects of aging are included in this paper. The current maintenance for the control rod drive system at fifteen Westinghouse PWRs was obtained through a survey conducted in cooperation with EPRI and NUMARC. The results of the survey indicate that some plants have modified the system, replaced components, or expanded preventive maintenance. Several of these activities have effectively addressed the aging issue. 2 refs., 2 figs., 2 tabs.

  20. Modern Fuel Cladding in Demanding Operation - ZIRLO in Full Life High Lithium PWR Coolant

    SciTech Connect (OSTI)

    Kargol, Kenneth [Pacific Gas and Electric Company, Diablo Canyon Power Plant, Avila Beach, California (United States); Stevens, Jim [TXU Power, Comanche Peak Steam Electric Station, Glen Rose, Texas (United States); Bosma, John [Westinghouse Electric Company, Dallas, Texas (United States); Iyer, Jayashri; Wikmark, Gunnar [Westinghouse Electric Company, Columbia, South Carolina (United States)

    2007-07-01T23:59:59.000Z

    There is an increasing demand to optimize the PWR water chemistry in order to minimize activity build-up in the plants and to avoid CIPS and other fuel related issues. Operation with a constant pH between 7.2 and 7.4 is generally considered an important part in achieving the optimized water chemistry. The extended long cycles currently used in most of the U.S. PWRs implies that the lithium concentration at BOC will be outside the general operating experience with such a coolant chemistry regime. With the purpose to extend the experience of high lithium coolant operation, such water chemistry has been used in a few PWRs, i.e. CPSES Unit 2 and Diablo Canyon Units 1 and 2, all with ZIRLO{sup TM} cladding. Operation with a lithium concentration up to 4.2 ppm does not show any impact of the elevated lithium, while operation with up to 6 ppm possibly produce some limited corrosion acceleration in the region of sub-nucleate boiling but has no detrimental impact under the conditions limited by current operating experience. (authors)

  1. Assessment of molten debris freezing in a severe RIA in-pile test. [PWR; BWR

    SciTech Connect (OSTI)

    El-Genk, M.S.; Moore, R.L.

    1980-01-01T23:59:59.000Z

    An understanding of the freezing of molten debris on cold core structures following a hypothetical core meltdown accident in a light water reactor (LWR) is of importance to reactor safety analysis. The purpose of the present investigation was to analyze the transient freezing of the molten debris produced in a severe reactivity initiated accident (RIA) scoping test, designated RIA-ST-4, which was performed in the Power Burst Facility and simulated a BWR control rod drop accident. In the RIA-ST-4 experiment, a single, unirradiated, 20 wt % enriched, UO/sub 2/ fuel rod contained within a Zircaloy flow shroud was subjected to a single power burst which deposited a total energy of about 700 cal/g UO/sub 2/. This energy deposition is well above what is possible in a commercial LWR during a hypothetical control rod drop (BWR) or ejection (PWR) accident. However, the performance of such an in-pile test has provided important information regarding molten debris movement, relocation, and freezing on cold walls.

  2. Head Loss Evaluation in a PWR Reactor Vessel Using CFD Analysis

    SciTech Connect (OSTI)

    Ji Hwan Jeong; Jong Pil Park [School of Mechanical Engineering, Pusan National University, Enesys Jangjeon-dong, Geumjeong-gu, Busan (Korea, Republic of); Byoung-Sub Han [Jangdae-dong, Yusong-gu, Daejeon (Korea, Republic of)

    2006-07-01T23:59:59.000Z

    Nuclear vendors and utilities perform lots of simulations and analyses in order to ensure the safe operation of nuclear power plants (NPPs). In general, the simulations are carried out using vendor-specific design codes and best-estimate system analysis codes and most of them were developed based on 1-dimensional lumped parameter models. During the past decade, however, computers, parallel computation methods, and 3-dimensional computational fluid dynamics (CFD) codes have been dramatically enhanced. It is believed to be beneficial to take advantage of advanced commercial CFD codes in safety analysis and design of NPPs. The present work aims to analyze the flow distribution in downcomer and lower plenum of Korean standard nuclear power plants (KSNPs) using STAR-CD. The lower plenum geometry of a PWR is very complicated since there are so many reactor internals, which hinders in CFD analysis for real reactor geometry up to now. The present work takes advantage of 3D CAD model so that real geometry of lower plenum is used. The results give a clear figure about flow fields in the reactor vessel, which is one of major safety concerns. The calculated pressure drop across downcomer and lower plenum appears to be in good agreement with the data in engineering calculation note. A algorithm which can evaluate head loss coefficient which is necessary for thermal-hydraulic system code running was suggested based on this CFD analysis results. (authors)

  3. ASTM standards associated with PWR and BWR power plant licensing, operation and surveillance

    SciTech Connect (OSTI)

    McElroy, W.N. [Consultants and Technology Services, Richland, WA (United States); McElroy, R.J. [AEA Reactor Services, Harwell (United Kingdom); Gold, R. [Metrology Control Corp., Richland, WA (United States); Lippincott, E.P. [Westinghouse Electric Corp., Pittsburgh, PA (United States); Lowe, A.L. Jr. [BW Nuclear Technologies, Lynchburg, VA (United States)

    1994-12-31T23:59:59.000Z

    This paper considers ASTM Standards that are available, under revision, and are being considered in support of Pressurized Water Reactor (PWR) and Boiling Water Reactor (BWR) Nuclear Power Plant (NPP) licensing, regulation, operation, surveillance and life attainment. The current activities of ASTM Committee E10 and its Subcommittees E10.02 and current activities of ASTM Committee E10 and its Subcommittees E10.02 and E10.05 and their Task Groups (TG) are described. A very important aspect of these efforts is the preparation, revision, and balloting of standards identified in the ASTM E706 Standard on Master Matrix for Light Water Reactor (LWR) Pressure Vessel (PV) Surveillance Standards. The current version (E706-87) of the Master Matrix identifies 21 ASTM LWR physics-dosimetry-metallurgy standards for Reactor Pressure Vessel (RPV) and Support Structure (SS) surveillance programs, whereas, for the next revision 34 standards are identified. The need for national and international coordination of Standards Technology Development, Transfer and Training (STDTT) is considered in this and other Symposium papers that address specific standards related physics-dosimetry-metallurgy issues. 69 refs.

  4. LBB evaluation for a typical Japanese PWR primary loop by using the US NRC approved methods

    SciTech Connect (OSTI)

    Swamy, S.A.; Bhowmick, D.C.; Prager, D.E. [Westinghouse Nuclear Technology Division, Pittsburgh, PA (United States)

    1997-04-01T23:59:59.000Z

    The regulatory requirements for postulated pipe ruptures have changed significantly since the first nuclear plants were designed. The Leak-Before-Break (LBB) methodology is now accepted as a technically justifiable approach for eliminating postulation of double-ended guillotine breaks (DEGB) in high energy piping systems. The previous pipe rupture design requirements for nuclear power plant applications are responsible for all the numerous and massive pipe whip restraints and jet shields installed for each plant. This results in significant plant congestion, increased labor costs and radiation dosage for normal maintenance and inspection. Also the restraints increase the probability of interference between the piping and supporting structures during plant heatup, thereby potentially impacting overall plant reliability. The LBB approach to eliminate postulating ruptures in high energy piping systems is a significant improvement to former regulatory methodologies, and therefore, the LBB approach to design is gaining worldwide acceptance. However, the methods and criteria for LBB evaluation depend upon the policy of individual country and significant effort continues towards accomplishing uniformity on a global basis. In this paper the historical development of the U.S. LBB criteria will be traced and the results of an LBB evaluation for a typical Japanese PWR primary loop applying U.S. NRC approved methods will be presented. In addition, another approach using the Japanese LBB criteria will be shown and compared with the U.S. criteria. The comparison will be highlighted in this paper with detailed discussion.

  5. Plains and Eastern Clean Line Transmission Line: Comment from...

    Office of Environmental Management (EM)

    from Block Plains and Eastern Clean Line: Arkansas and Oklahoma Plains and Eastern Clean Line Transmission Line: Comment from Block Plains and Eastern Clean Line: Arkansas and...

  6. Analysis of a rod withdrawal in a PWR core with the neutronic- thermalhydraulic coupled code RELAP/PARCS and RELAP/VALKIN

    SciTech Connect (OSTI)

    Miro, R.; Maggini, F.; Barrachina, T.; Verdu, G. [Departamento de Ingenieria Quimica y Nuclear, Universidad Politecnica de Valencia, Camino de Vera, 14, 46022, Valencia (Spain); Gomez, A.; Ortego, A. [IBERINCO, Avenida de Burgos, Madrid (Spain); Murillo, J. C. [CNAT, Av. Manoteras, Madrid (Spain)

    2006-07-01T23:59:59.000Z

    The Reactor Ejection Accident (REA) belongs to the Reactor Initiated Accidents (RIA) category of accidents and it is part of the licensing basis accident analyses required for pressure water reactors (PWR). The REA at hot zero power (HZP) is characterized by a single rod ejection from a core position with a very low power level. The evolution consists basically of a continuous reactivity insertion. The main feature limiting the consequences of the accident in a PWR is the Doppler Effect. To check the performance of the coupled code RELAP5/PARCS2.5 and RELAP5/VALKIN a REA in Trillo NPP is simulated. These analyses will allow knowing more accurately the PWR real plant phenomenology in the RIA most limiting conditions. (authors)

  7. A safety and regulatory assessment of generic BWR and PWR permanently shutdown nuclear power plants

    SciTech Connect (OSTI)

    Travis, R.J.; Davis, R.E.; Grove, E.J.; Azarm, M.A. [Brookhaven National Lab., Upton, NY (United States)

    1997-08-01T23:59:59.000Z

    The long-term availability of less expensive power and the increasing plant modification and maintenance costs have caused some utilities to re-examine the economics of nuclear power. As a result, several utilities have opted to permanently shutdown their plants. Each licensee of these permanently shutdown (PSD) plants has submitted plant-specific exemption requests for those regulations that they believe are no longer applicable to their facility. This report presents a regulatory assessment for generic BWR and PWR plants that have permanently ceased operation in support of NRC rulemaking activities in this area. After the reactor vessel is defueled, the traditional accident sequences that dominate the operating plant risk are no longer applicable. The remaining source of public risk is associated with the accidents that involve the spent fuel. Previous studies have indicated that complete spent fuel pool drainage is an accident of potential concern. Certain combinations of spent fuel storage configurations and decay times, could cause freshly discharged fuel assemblies to self heat to a temperature where the self sustained oxidation of the zircaloy fuel cladding may cause cladding failure. This study has defined four spent fuel configurations which encompass all of the anticipated spent fuel characteristics and storage modes following permanent shutdown. A representative accident sequence was chosen for each configuration. Consequence analyses were performed using these sequences to estimate onsite and boundary doses, population doses and economic costs. A list of candidate regulations was identified from a screening of 10 CFR Parts 0 to 199. The continued applicability of each regulation was assessed within the context of each spent fuel storage configuration and the results of the consequence analyses.

  8. Testing and analyses of the TN-24P PWR spent-fuel dry storage cask loaded with consolidated fuel

    SciTech Connect (OSTI)

    McKinnon, M A; Michener, T E; Jensen, M F; Rodman, G R

    1989-02-01T23:59:59.000Z

    A performance test of a Transnuclear, Inc. TN-24P storage cask configured for pressurized water reactor (PWR) spent fuel was performed. The work was performed by the Pacific Northwest Laboratory (PNL) and Idaho National Engineering Laboratory (INEL) for the US Department of Energy Office of Civilian Radioactive Waste Management (OCRWM) and the Electric Power Research Institute. The performance test consisted of loading the TN-24P cask with 24 canisters of consolidated PWR spent fuel from Virginia Power's Surry and Florida Power and Light's Turkey Point reactors. Cask surface and fuel canister guide tube temperatures were measured, as were cask surface gamma and neutron dose rates. Testing was performed with vacuum, nitrogen, and helium backfill environments in both vertical and horizontal cask orientations. Transnuclear, Inc., arranged to have a partially insulated run added to the end of the test to simulate impact limiters. Limited spent fuel integrity data were also obtained. From both heat transfer and shielding perspectives, the TN-24P cask with minor refinements can be effectively implemented at reactor sites and central storage facilities for safe storage of unconsolidated and consolidated spent fuel. 35 refs., 93 figs., 17 tabs.

  9. TOPICAL REPORT ON ACTINIDE-ONLY BURNUP CREDIT FOR PWR SPENT NUCLEAR FUEL PACKAGES

    SciTech Connect (OSTI)

    DOE

    1997-04-01T23:59:59.000Z

    A methodology for performing and applying nuclear criticality safety calculations, for PWR spent nuclear fuel (SNF) packages with actinide-only burnup credit, is described. The changes in the U-234, U-235, U-236, U-238, Pu-238, Pu-239, Pu-240, Pu-241, Pu-242, and Am-241 concentration with burnup are used in burnup credit criticality analyses. No credit for fission product neutron absorbers is taken. The methodology consists of five major steps. (1) Validate a computer code system to calculate isotopic concentrations of SNF created during burnup in the reactor core and subsequent decay. A set of chemical assay benchmarks is presented for this purpose as well as a method for assessing the calculational bias and uncertainty, and conservative correction factors for each isotope. (2) Validate a computer code system to predict the subcritical multiplication factor, k{sub eff}, of a spent nuclear fuel package. Fifty-seven UO{sub 2}, UO{sub 2}/Gd{sub 2}O{sub 3}, and UO{sub 2}/PuO{sub 2} critical experiments have been selected to cover anticipated conditions of SNF. The method uses an upper safety limit on k{sub eff} (which can be a function of the trending parameters) such that the biased k{sub eff}, when increased for the uncertainty is less than 0.95. (3) Establish bounding conditions for the isotopic concentration and criticality calculations. Three bounding axial profiles have been established to assure the ''end effect'' is accounted for conservatively. (4) Use the validated codes and bounding conditions to generate package loading criteria (burnup credit loading curves). Burnup credit loading curves show the minimum burnup required for a given initial enrichment. The utility burnup record is compared to this requirement after the utility accounts for the uncertainty in its record. Separate curves may be generated for each assembly design, various minimum cooling times and burnable absorber histories. (5) Verify that SNF assemblies meet the package loading criteria and confirm proper assembly selection prior to loading. A measurement of the average assembly burnup is required and that measurement must be within 10% of the utility burnup record for the assembly to be accepted. The measurement device must be accurate to within 10%. Each step is described in detail for use with any computer code system and is then demonstrated with the SCALE 4.2 computer code package using 27BURNUPLIB cross sections.

  10. Thomas, J.R. and Clem, A.W, 1991, PWR moderator temperature coefficient via noise analysis: time series methods, Proceedings of SMORNVI, Gatlinburg, 34.01

    E-Print Network [OSTI]

    Pzsit, Imre

    and Testing Symposium, Knoxville, Tennes see 52.01 Uhrig, R.E., 1990, Use of artificial intelligence/Computer Interactions: Nuclear and Beyond, Nash ville, Tennessee, 210 Uhrig R.E., 1991, Potential application of neural 36 Thomas, J.R. and Clem, A.W, 1991, PWR moderator temperature coefficient via noise analysis

  11. PWR core design, neutronics evaluation and fuel cycle analysis for thorium-uranium breeding recycle

    SciTech Connect (OSTI)

    Bi, G.; Liu, C.; Si, S. [Shanghai Nuclear Engineering Research and Design Inst., No. 29, Hongcao Road, Shanghai, 200233 (China)

    2012-07-01T23:59:59.000Z

    This paper was focused on core design, neutronics evaluation and fuel cycle analysis for Thorium-Uranium Breeding Recycle in current PWRs, without any major change to the fuel lattice and the core internals, but substituting the UOX pellet with Thorium-based pellet. The fuel cycle analysis indicates that Thorium-Uranium Breeding Recycle is technically feasible in current PWRs. A 4-loop, 193-assembly PWR core utilizing 17 x 17 fuel assemblies (FAs) was taken as the model core. Two mixed cores were investigated respectively loaded with mixed reactor grade Plutonium-Thorium (PuThOX) FAs and mixed reactor grade {sup 233}U-Thorium (U{sub 3}ThOX) FAs on the basis of reference full Uranium oxide (UOX) equilibrium-cycle core. The UOX/PuThOX mixed core consists of 121 UOX FAs and 72 PuThOX FAs. The reactor grade {sup 233}U extracted from burnt PuThOX fuel was used to fabrication of U{sub 3}ThOX for starting Thorium-. Uranium breeding recycle. In UOX/U{sub 3}ThOX mixed core, the well designed U{sub 3}ThOX FAs with 1.94 w/o fissile uranium (mainly {sup 233}U) were located on the periphery of core as a blanket region. U{sub 3}ThOX FAs remained in-core for 6 cycles with the discharged burnup achieving 28 GWD/tHM. Compared with initially loading, the fissile material inventory in U{sub 3}ThOX fuel has increased by 7% via 1-year cooling after discharge. 157 UOX fuel assemblies were located in the inner of UOX/U{sub 3}ThOX mixed core refueling with 64 FAs at each cycle. The designed UOX/PuThOX and UOX/U{sub 3}ThOX mixed core satisfied related nuclear design criteria. The full core performance analyses have shown that mixed core with PuThOX loading has similar impacts as MOX on several neutronic characteristic parameters, such as reduced differential boron worth, higher critical boron concentration, more negative moderator temperature coefficient, reduced control rod worth, reduced shutdown margin, etc.; while mixed core with U{sub 3}ThOX loading on the periphery of core has no visible impacts on neutronic characteristics compared with reference full UOX core. The fuel cycle analysis has shown that {sup 233}U mono-recycling with U{sub 3}ThOX fuel could save 13% of natural uranium resource compared with UOX once through fuel cycle, slightly more than that of Plutonium single-recycling with MOX fuel. If {sup 233}U multi-recycling with U{sub 3}ThOX fuel is implemented, more natural uranium resource would be saved. (authors)

  12. Series Transmission Line Transformer

    DOE Patents [OSTI]

    Buckles, Robert A. (Livermore, CA); Booth, Rex (Livermore, CA); Yen, Boris T. (El Cerrito, CA)

    2004-06-29T23:59:59.000Z

    A series transmission line transformer is set forth which includes two or more of impedance matched sets of at least two transmissions lines such as shielded cables, connected in parallel at one end ans series at the other in a cascading fashion. The cables are wound about a magnetic core. The series transmission line transformer (STLT) which can provide for higher impedance ratios and bandwidths, which is scalable, and which is of simpler design and construction.

  13. Electric Transmission Lines (Nebraska)

    Broader source: Energy.gov [DOE]

    The Public Service Commission has jurisdiction over all electricity transmission lines crossing over or under railroad tracks at public highway crossings. This section contains general regulations...

  14. Safety and licensing issues that are being addressed by the Power Burst Facility test programs. [PWR; BWR

    SciTech Connect (OSTI)

    McCardell, R.K.; MacDonald, P.E.

    1980-01-01T23:59:59.000Z

    This paper presents an overview of the results of the experimental program being conducted in the Power Burst Facility and the relationship of these results to certain safety and licensing issues. The safety issues that were addressed by the Power-Cooling-Mismatch, Reactivity Initiated Accident, and Loss of Coolant Accident tests, which comprised the original test program in the Power Burst Facility, are discussed. The resolution of these safety issues based on the results of the thirty-six tests performed to date, is presented. The future resolution of safety issues identified in the new Power Burst Facility test program which consists of tests which simulate BWR and PWR operational transients, anticipated transients without scram, and severe fuel damage accidents, is described.

  15. Development code for sensitivity and uncertainty analysis of input on the MCNPX for neutronic calculation in PWR core

    SciTech Connect (OSTI)

    Hartini, Entin, E-mail: entin@batan.go.id; Andiwijayakusuma, Dinan, E-mail: entin@batan.go.id [Center for Development of Nuclear Informatics - National Nuclear Energy Agency, PUSPIPTEK, Serpong, Tangerang, Banten (Indonesia)

    2014-09-30T23:59:59.000Z

    This research was carried out on the development of code for uncertainty analysis is based on a statistical approach for assessing the uncertainty input parameters. In the butn-up calculation of fuel, uncertainty analysis performed for input parameters fuel density, coolant density and fuel temperature. This calculation is performed during irradiation using Monte Carlo N-Particle Transport. The Uncertainty method based on the probabilities density function. Development code is made in python script to do coupling with MCNPX for criticality and burn-up calculations. Simulation is done by modeling the geometry of PWR terrace, with MCNPX on the power 54 MW with fuel type UO2 pellets. The calculation is done by using the data library continuous energy cross-sections ENDF / B-VI. MCNPX requires nuclear data in ACE format. Development of interfaces for obtaining nuclear data in the form of ACE format of ENDF through special process NJOY calculation to temperature changes in a certain range.

  16. The toughness of irradiated pressure water reactor (PWR) vessel shell rings and the effect of segregation zones

    SciTech Connect (OSTI)

    Bethmont, M.; Frund, J.M. [Electricite de France, Moret-sur-Loing (France); Housin, B. [Framatome, Paris La Defense (France). Materials and Technology Dept.; Soulat, P. [Commissariat a l`Energie Atomique, Gif-sur-Yvette (France)

    1996-12-31T23:59:59.000Z

    To establish the integrity of pressure water reactor (PWR) vessels it is necessary to determine the toughness of A508Cl.3 steel at the end of its life, that is after thermal aging and irradiation embrittlement. In safety analyses the toughness can be deduced from a reference curve set forth in the code (ASME or RCC-M). The validity of the reference curve has been verified for several years for unirradiated French reactor vessels. Tests were performed on specimens taken from materials having heterogeneities in chemical composition. For most of the test results the reference curve is a lower bound. To solve te problem of determining the toughness of SA 508 Cl.3 steel after irradiation and in the presence of possible heterogeneities, the toughness results were gathered. The synthesis shows that the RCC-M code curve is conservative.

  17. Ten year RPV inspections experiences in a PWR in Spain: Improvements in the inner-radius inspection techniques

    SciTech Connect (OSTI)

    Gonzalez, E.; Willke, A. [Tecnatom, S.A., Madrid (Spain)

    1994-12-31T23:59:59.000Z

    The in-service inspection of an RPV, performed in accordance with the scope and requirements of Section 11 of the ASME Code at the end of the ten year interval, is one of the most complicated ISI activities carried out. Special resources and tools are required for successful performance of this type of inspection: (1) preparation and planning; (2) mechanical scanner; (3) data acquisition and analysis system; and (4) ultrasonic techniques. This paper describes the most relevant issues relating to RPV inspection, along with the experience obtained during the inspection of the RPV of a 930 MW Spanish PWR plant in 1992. Special attention is paid to the improvements achieved with respect to inspection of the inner-radius areas of the primary nozzles.

  18. Transmission Line Security Monitor

    ScienceCinema (OSTI)

    None

    2013-05-28T23:59:59.000Z

    The Transmission Line Security Monitor is a multi-sensor monitor that mounts directly on high-voltage transmission lines to detect, characterize and communicate terrorist activity, human tampering and threatening conditions around support towers. For more information about INL's critical infrastructure protection research, visit http://www.facebook.com/idahonationallaboratory.

  19. Transmission Line Security Monitor

    SciTech Connect (OSTI)

    None

    2011-01-01T23:59:59.000Z

    The Transmission Line Security Monitor is a multi-sensor monitor that mounts directly on high-voltage transmission lines to detect, characterize and communicate terrorist activity, human tampering and threatening conditions around support towers. For more information about INL's critical infrastructure protection research, visit http://www.facebook.com/idahonationallaboratory.

  20. Intrinsic AGN Absorption Lines

    E-Print Network [OSTI]

    Fred Hamann

    2000-06-12T23:59:59.000Z

    Strong absorption lines are common in rest-frame UV spectra of AGNs due to a variety of resonant transitions, for example the HI Lyman series lines (most notably Ly-alpha 1216) and high-ionization doublets like CIV 1549,1551. The lines are called ``intrinsic'' if the absorbing gas is physically related to the AGN, e.g. if the absorber resides broadly within the radius of the AGN's surrounding ``host'' galaxy. Intrinsic absorption lines are thus valuable probes of the kinematics, physical conditions and elemental abundances in the gas near AGNs. Studies of intrinsic absorbers have historically emphasized the broad absorption lines (BALs) in quasars. Today we recognize a wider variety of intrinsic lines in a wider range of objects. For example, we now know that Seyfert 1 galaxies (the less luminous cousins of quasars) have intrinsic absorption. We also realize that intrinsic lines can form in a range of AGN environments --- from the dynamic inner regions like the BALs, to the more quiescent outer host galaxies >10 kpc away. This article provides a brief introduction to current observational and theoretical work on intrinsic AGN absorbers.

  1. Coherent soliton communication lines

    SciTech Connect (OSTI)

    Yushko, O. V., E-mail: olesya.yushko@gmail.com; Redyuk, A. A.; Fedoruk, M. P.; Turitsyn, S. K. [Novosibirsk State University (Russian Federation)

    2014-11-15T23:59:59.000Z

    The data transmission in coherent fiber-optical communication lines using solitons with a variable phase is studied. It is shown that nonlinear coherent structures (solitons) can be applied for effective signal transmission over a long distance using amplitude and optical-phase keying of information. The optimum ratio of the pulse width to the bit slot at which the spectral efficiency (transmitted bits per second and hertz) is maximal is determined. It is shown that soliton fiber-optical communication lines can ensure data transmission at a higher spectral efficiency as compared to traditional communication lines and at a high signal-to-noise ratio.

  2. Chemical System Decontamination at PWR Power Stations Biblis A and B by Advanced System Decontamination by Oxidizing Chemistry (ASDOC-D) Process Technology - 13081

    SciTech Connect (OSTI)

    Loeb, Andreas; Runge, Hartmut; Stanke, Dieter [NIS Ingenieurgesellschaft mbH, Industriestrasse 13, 63755 Alzenau (Germany)] [NIS Ingenieurgesellschaft mbH, Industriestrasse 13, 63755 Alzenau (Germany); Bertholdt, Horst-Otto [NCT Consulting, Leonhardstrasse 16-18, 90443 Nuernberg (Germany)] [NCT Consulting, Leonhardstrasse 16-18, 90443 Nuernberg (Germany); Adams, Andreas; Impertro, Michael; Roesch, Josef [RWE Power, 68643 Biblis (Germany)] [RWE Power, 68643 Biblis (Germany)

    2013-07-01T23:59:59.000Z

    For chemical decontamination of PWR primary systems the so called ASDOC-D process has been developed and qualified at the German PWR power station Biblis. In comparison to other chemical decontamination processes ASDOC-D offers a number of advantages: - ASDOC-D does not require separate process equipment but is completely operated and controlled by the nuclear site installations. Feeding of chemical concentrates into the primary system is done by means of the site's dosing systems. Process control is performed by standard site instrumentation and analytics. - ASDOC-D safely prevents any formation and precipitation of insoluble constituents - Since ASDOC-D is operated without external equipment there is no need for installation of such equipment in high radioactive radiation surrounding. The radioactive exposure rate during process implementation and process performance may therefore be neglected in comparison to other chemical decontamination processes. - ASDOC-D does not require auxiliary hose connections which usually bear high leakage risk. The above mentioned technical advantages of ASDOC-D together with its cost-effectiveness gave rise to Biblis Power station to agree on testing ASDOC-D at the volume control system of PWR Biblis unit A. By involving the licensing authorities as well as expert examiners into this test ASDOC-D received the official qualification for primary system decontamination in German PWR. As a main outcome of the achieved results NIS received contracts for full primary system decontamination of both units Biblis A and B (each 1.200 MW) by end of 2012. (authors)

  3. Holes in Spectral Lines

    E-Print Network [OSTI]

    Fontana, Peter R.; Srivastava, Rajendra P.

    1973-06-01T23:59:59.000Z

    The decay of an atom in the presence of a static perturbation is investigated. The perturbation couples a decaying state with a nondecaying state. A "hole" appears in the emission line at a frequency equal to the frequency difference between...

  4. Line Extension Alternatives

    Broader source: Energy.gov [DOE]

    The Public Service Board (PSB) of Vermont developed rules regarding utility line extension requests. While the majority of the rules focus on the procedure followed (and associated fees) for the...

  5. Electric Transmission Lines (Iowa)

    Broader source: Energy.gov [DOE]

    Electric transmission lines capable of operating at 69 kV or greater cannot be constructed along, across, or over any public highways or grounds outside of cities without a franchise from the...

  6. Power line detection system

    DOE Patents [OSTI]

    Latorre, V.R.; Watwood, D.B.

    1994-09-27T23:59:59.000Z

    A short-range, radio frequency (RF) transmitting-receiving system that provides both visual and audio warnings to the pilot of a helicopter or light aircraft of an up-coming power transmission line complex. Small, milliwatt-level narrowband transmitters, powered by the transmission line itself, are installed on top of selected transmission line support towers or within existing warning balls, and provide a continuous RF signal to approaching aircraft. The on-board receiver can be either a separate unit or a portion of the existing avionics, and can also share an existing antenna with another airborne system. Upon receipt of a warning signal, the receiver will trigger a visual and an audio alarm to alert the pilot to the potential power line hazard. 4 figs.

  7. Power line detection system

    DOE Patents [OSTI]

    Latorre, Victor R. (Tracy, CA); Watwood, Donald B. (Tracy, CA)

    1994-01-01T23:59:59.000Z

    A short-range, radio frequency (RF) transmitting-receiving system that provides both visual and audio warnings to the pilot of a helicopter or light aircraft of an up-coming power transmission line complex. Small, milliwatt-level narrowband transmitters, powered by the transmission line itself, are installed on top of selected transmission line support towers or within existing warning balls, and provide a continuous RF signal to approaching aircraft. The on-board receiver can be either a separate unit or a portion of the existing avionics, and can also share an existing antenna with another airborne system. Upon receipt of a warning signal, the receiver will trigger a visual and an audio alarm to alert the pilot to the potential power line hazard.

  8. Scoping design analyses for optimized shipping casks containing 1-, 2-, 3-, 5-, 7-, or 10-year-old PWR spent fuel

    SciTech Connect (OSTI)

    Bucholz, J.A.

    1983-01-01T23:59:59.000Z

    This report details many of the interrelated considerations involved in optimizing large Pb, Fe, or U-metal spent fuel shipping casks containing 1, 2, 3, 5, 7, or 10-year-old PWR fuel assemblies. Scoping analyses based on criticality, shielding, and heat transfer considerations indicate that some casks may be able to hold as many as 18 to 21 ten-year-old PWR fuel assemblies. In the criticality section, a new type of inherently subcritical fuel assembly separator is described which uses hollow, borated stainless-steel tubes in the wall-forming structure between the assemblies. In another section, details of many n/..gamma.. shielding optimization studies are presented, including the optimal n/..gamma.. design points and the actual shielding requirements for each type of cask as a function of the age of the spent fuel and the number of assemblies in the cask. Multigroup source terms based on ORIGEN2 calculations at these and other decay times are also included. Lastly, the numerical methods and experimental correlations used in the steady-state and transient heat transfer analyses are fully documented, as are pertinent aspects of the SCOPE code for Shipping Cask Optimization and Parametric Evaluation. (While only casks for square, intact PWR fuel assemblies were considered in this study, the SCOPE code may also be used to design and analyze casks containing canistered spent fuel or other waste material. An abbreviated input data guide is included as an appendix).

  9. Improvement of the thermal margins in the Swedish Ringhals-3 PWR by introducing new fuel assemblies with thorium

    SciTech Connect (OSTI)

    Lau, C. W.; Demaziere, C. [Dept. of Applied Physics, Div. of Nuclear Engineering, Chalmers Univ. of Technology, 412 96 Gothenburg (Sweden); Nylen, H.; Sandberg, U. [Ringhals AB, 432 85 Vaeroebacka (Sweden)

    2012-07-01T23:59:59.000Z

    Thorium is a fertile material and most of the past research has focused on breeding thorium to fissile material. In this paper, the focus is on using thorium to improve the thermal margins by homogeneously distributing thorium in the fuel pellets. A proposed uranium-thorium-based fuel assembly is simulated for the Swedish Ringhals-3 PWR core in a realistic demonstration. All the key safety parameters, such as isothermal temperature coefficient of reactivity, Doppler temperature of reactivity, boron worth, shutdown margins and fraction of delayed neutrons are studied in this paper, and are within safety limits for the new core design using the uranium-thorium-based fuel assemblies. The calculations were performed by the two-dimensional transport code CASMO-4E and the two group steady-state three dimensional nodal code SIMULATE-3 from Studsvik Scandpower. The results showed that the uranium-thorium-based fuel assembly improves the thermal margins, both in the pin peak power and the local power (Fq). The improved thermal margins would allow more flexible core designs with less neutron leakage or could be used in power uprates to offer efficient safety margins. (authors)

  10. Preliminary results of the PWR low power and shutdown accident frequencies program: Coarse screening analysis for Surry

    SciTech Connect (OSTI)

    Chu, T.L.; Musicki, Z.; Luckas, W.; Wong, S.M.; Neymotin, L.; Diamond, D.J.; Hsu, C.J.; Bozoki, G.; Kohut, P.; Fitzpatrick, R. [Brookhaven National Lab., Upton, NY (United States); Siu, N. [Massachusetts Inst. of Tech., Cambridge, MA (United States)

    1991-12-31T23:59:59.000Z

    This document presents the preliminary internal events Level 1 results (including fire and flood) obtained as a result of a coarse screening analysis on the low power and shutdown accident frequencies of the Surry Nuclear Power Plant. The work was performed by Brookhaven National Laboratory (BNL) for the Nuclear Regulatory Commission Office of Nuclear Regulatory Research (RES). This coarse screening analysis was performed in support of the NRC staff`s follow-up actions subsequent to the March 20, 1990 Vogtle incident with the objective of providing high-level qualitative insights within a relatively short time frame. It is the first phase of a major study that will ultimately produce estimates on the core damage frequency of a pressurized water reactor (PWR) during low power and shutdown conditions. Phase 2 of the study will be guided by the Phase 1 results in order to concentrate the effort on the various plant operational states, the dominant accident sequences, and pertinent data items according to their importance to core damage frequency and risk.

  11. Preliminary results of the PWR low power and shutdown accident frequencies program: Coarse screening analysis for Surry

    SciTech Connect (OSTI)

    Chu, T.L.; Musicki, Z.; Luckas, W.; Wong, S.M.; Neymotin, L.; Diamond, D.J.; Hsu, C.J.; Bozoki, G.; Kohut, P.; Fitzpatrick, R. (Brookhaven National Lab., Upton, NY (United States)); Siu, N. (Massachusetts Inst. of Tech., Cambridge, MA (United States))

    1991-01-01T23:59:59.000Z

    This document presents the preliminary internal events Level 1 results (including fire and flood) obtained as a result of a coarse screening analysis on the low power and shutdown accident frequencies of the Surry Nuclear Power Plant. The work was performed by Brookhaven National Laboratory (BNL) for the Nuclear Regulatory Commission Office of Nuclear Regulatory Research (RES). This coarse screening analysis was performed in support of the NRC staff's follow-up actions subsequent to the March 20, 1990 Vogtle incident with the objective of providing high-level qualitative insights within a relatively short time frame. It is the first phase of a major study that will ultimately produce estimates on the core damage frequency of a pressurized water reactor (PWR) during low power and shutdown conditions. Phase 2 of the study will be guided by the Phase 1 results in order to concentrate the effort on the various plant operational states, the dominant accident sequences, and pertinent data items according to their importance to core damage frequency and risk.

  12. Level 1 probabilistic risk assessment of low power and shutdown operations at a PWR: Phase 2 results

    SciTech Connect (OSTI)

    Chu, T.L.; Bozoki, G.; Kohut, P.; Musicki, Z.; Wong, S.M.; Yang, J.; Hsu, C.J.; Diamond, D.J.; Su, R.F. (Brookhaven National Lab., Upton, NY (United States)); Holmes, B. (AEA Technology, London (United Kingdom)); Siu, N. (Massachusetts Inst. of Tech., Cambridge, MA (United States)); Bley, D.; Lin, J. (Pickard, Lowe and Garrick, Inc., Newport Beach, CA (United States))

    1992-01-01T23:59:59.000Z

    As a result of the Chernobyl accident and other precursor events (e.g., Diablo Canyon), the US Nuclear Regulatory Commission's (NRC's) Office of Nuclear Regulatory Research (RES) initiated an extensive project during 1989 to carefully examine the potential risks during Low Power and Shutdown (LP S) operations. Shortly after the program began, an event occurred at the Vogtle plant during shutdown, which further intensified the effort of the LP S program. In the LP S program, one pressurized water reactor (PWR), Surry, and one boiling water reactor (BWR), Grand Gulf, were selected, mainly because they were previously analyzed in the NUREG-1150 Study. The Level-1 Program is being performed in two phases. Phase 1 was dedicated to performing a coarse screening level-1 analysis including internal fire and flood. A draft report was completed in November, 1991. In the phase 2 study, mid-loop operations at the Surry plant were analyzed in detail. The objective of this paper is to present the approach of the phase 2 study and the preliminary results and insights.

  13. Level 1 probabilistic risk assessment of low power and shutdown operations at a PWR: Phase 2 results

    SciTech Connect (OSTI)

    Chu, T.L.; Bozoki, G.; Kohut, P.; Musicki, Z.; Wong, S.M.; Yang, J.; Hsu, C.J.; Diamond, D.J.; Su, R.F. [Brookhaven National Lab., Upton, NY (United States); Holmes, B. [AEA Technology, London (United Kingdom); Siu, N. [Massachusetts Inst. of Tech., Cambridge, MA (United States); Bley, D.; Lin, J. [Pickard, Lowe and Garrick, Inc., Newport Beach, CA (United States)

    1992-12-31T23:59:59.000Z

    As a result of the Chernobyl accident and other precursor events (e.g., Diablo Canyon), the US Nuclear Regulatory Commission`s (NRC`s) Office of Nuclear Regulatory Research (RES) initiated an extensive project during 1989 to carefully examine the potential risks during Low Power and Shutdown (LP&S) operations. Shortly after the program began, an event occurred at the Vogtle plant during shutdown, which further intensified the effort of the LP&S program. In the LP&S program, one pressurized water reactor (PWR), Surry, and one boiling water reactor (BWR), Grand Gulf, were selected, mainly because they were previously analyzed in the NUREG-1150 Study. The Level-1 Program is being performed in two phases. Phase 1 was dedicated to performing a coarse screening level-1 analysis including internal fire and flood. A draft report was completed in November, 1991. In the phase 2 study, mid-loop operations at the Surry plant were analyzed in detail. The objective of this paper is to present the approach of the phase 2 study and the preliminary results and insights.

  14. Omega Transmission Lines

    E-Print Network [OSTI]

    Vehmas, Joni

    2013-01-01T23:59:59.000Z

    In this paper, we show how bi-anisotropic media with omega-type response can be realized using periodically loaded transmission lines. General conditions for the needed unit cell circuit block are derived. Also, an implementation is shown and analyzed.

  15. Command Line Tools Cloud Computing

    E-Print Network [OSTI]

    Ferrara, Katherine W.

    Command Line Tools Cloud Computing #12;Everybody (or nearly everybody) loves GUI. AWS Command Line of advanced features. After surviving the cloud computing class till now, Your are almost a command line guru! You need AWS command line tools, ec2-api-tools, to maximize the power of AWS cloud computing. Plugging

  16. Printed circuit dispersive transmission line

    DOE Patents [OSTI]

    Ikezi, H.; Lin-Liu, Y.R.; DeGrassie, J.S.

    1991-08-27T23:59:59.000Z

    A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other. 5 figures.

  17. Formation depths of Fraunhofer lines

    E-Print Network [OSTI]

    Gurtovenko, E A

    2015-01-01T23:59:59.000Z

    We have summed up our investigations performed in 1970--1993. The main task of this paper is clearly to show processes of formation of spectral lines as well as their distinction by validity and by location. For 503 photospheric lines of various chemical elements in the wavelength range 300--1000 nm we list in Table the average formation depths of the line depression and the line emission for the line centre and on the half-width of the line, the average formation depths of the continuum emission as well as the effective widths of the layer of the line depression formation. Dependence of average depths of line depression formation on excitation potential, equivalent widths, and central line depth are demonstrated by iron lines.

  18. Drill string transmission line

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Bradford, Kline (Orem, UT); Fox, Joe (Spanish Fork, UT)

    2006-03-28T23:59:59.000Z

    A transmission line assembly for transmitting information along a downhole tool comprising a pin end, a box end, and a central bore traveling between the pin end and the box end, is disclosed in one embodiment of the invention as including a protective conduit. A transmission line is routed through the protective conduit. The protective conduit is routed through the central bore and the ends of the protective conduit are routed through channels formed in the pin end and box end of the downhole tool. The protective conduit is elastically forced into a spiral or other non-linear path along the interior surface of the central bore by compressing the protective conduit to a length within the downhole tool shorter than the protective conduit.

  19. Transmission line: design manual

    SciTech Connect (OSTI)

    Farr, H.H.

    1980-01-01T23:59:59.000Z

    The purpose of this manual is to outline the various requirements for, and the procedures to be followed in the design of power transmission lines by the Bureau of Reclamation, US Department of the Interior. Numerous design studies, which have been made on specific aspects of transmission line design, are included with explanations of their applications. Information is presented concerning such aspects as selection of type of construction, conductor sags and tensions, insulation, lightning protection, clearance patterns, galloping conductors, structure limitation and guying charts, and structure spotting. Structure design examples are limited to wood-pole construction. Interpretations of the National Electrical Safety Code and other codes are made as required. Some of the example problems were developed when the sixth edition of NESC was current, and are so noted; however, most examples use the 1977 edition of NESC.

  20. Reactivity loss validation of high burn-up PWR fuels with pile-oscillation experiments in MINERVE

    SciTech Connect (OSTI)

    Leconte, P.; Vaglio-Gaudard, C.; Eschbach, R.; Di-Salvo, J.; Antony, M.; Pepino, A. [CEA, DEN, DER, Cadarache, F-13108 Saint-Paul-Lez-Durance (France)

    2012-07-01T23:59:59.000Z

    The ALIX experimental program relies on the experimental validation of the spent fuel inventory, by chemical analysis of samples irradiated in a PWR between 5 and 7 cycles, and also on the experimental validation of the spent fuel reactivity loss with bum-up, obtained by pile-oscillation measurements in the MINERVE reactor. These latter experiments provide an overall validation of both the fuel inventory and of the nuclear data responsible for the reactivity loss. This program offers also unique experimental data for fuels with a burn-up reaching 85 GWd/t, as spent fuels in French PWRs never exceeds 70 GWd/t up to now. The analysis of these experiments is done in two steps with the APOLLO2/SHEM-MOC/CEA2005v4 package. In the first one, the fuel inventory of each sample is obtained by assembly calculations. The calculation route consists in the self-shielding of cross sections on the 281 energy group SHEM mesh, followed by the flux calculation by the Method Of Characteristics in a 2D-exact heterogeneous geometry of the assembly, and finally a depletion calculation by an iterative resolution of the Bateman equations. In the second step, the fuel inventory is used in the analysis of pile-oscillation experiments in which the reactivity of the ALIX spent fuel samples is compared to the reactivity of fresh fuel samples. The comparison between Experiment and Calculation shows satisfactory results with the JEFF3.1.1 library which predicts the reactivity loss within 2% for burn-up of {approx}75 GWd/t and within 4% for burn-up of {approx}85 GWd/t. (authors)

  1. Evaluation of the thermal-hydraulic response and fuel rod thermal and mechanical deformation behavior during the power burst facility test LOC-3. [PWR

    SciTech Connect (OSTI)

    Yackle, T.R.; MacDonald, P.E.; Broughton, J.M.

    1980-01-01T23:59:59.000Z

    An evaluation of the results from the LOC-3 nuclear blowdown test conducted in the Power Burst Facility is presented. The test objective was to examine fuel and cladding behavior during a postulated cold leg break accident in a pressurized water reactor (PWR). Separate effects of rod internal pressure and the degree of irradiation were investigated in the four-rod test. Extensive cladding deformation (ballooning) and failure occurred during blowdown. The deformation of the low and high pressure rods was similar; however, the previously irradiated test rod deformed to a greater extent than a similar fresh rod exposed to identical system conditions.

  2. Utility Lines and Facilities (Montana)

    Broader source: Energy.gov [DOE]

    These regulations apply to the construction of utility and power lines and facilities. They address the use of public right-of-ways for such construction, underground power lines, and construction...

  3. Maersk Line Equipment guide

    National Nuclear Security Administration (NNSA)

    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 742EnergyOn AprilA Approved:AdministrationAnalysisDarby/%2AOU1a ComplexMaersk Line Equipment

  4. Please cite this article in press as: Malen, J.A., et al., Thermal hydraulic design of a hydride-fueled inverted PWR core. Nucl. Eng. Des. (2009), doi:10.1016/j.nucengdes.2009.02.026

    E-Print Network [OSTI]

    Malen, Jonathan A.

    2009-01-01T23:59:59.000Z

    Please cite this article in press as: Malen, J.A., et al., Thermal hydraulic design of a hydride hydraulic design of a hydride-fueled inverted PWR core J.A. Malena, , N.E. Todreasb , P. Hejzlarb , P and its thermal hydraulic performance is compared to that of a standard rod bundle core design also fueled

  5. A Critical Review of Practice of Equating the Reactivity of Spent Fuel to Fresh Fuel in Burnup Credit Criticality Safety Analyses for PWR Spent Fuel Pool Storage

    SciTech Connect (OSTI)

    Wagner, J.C.; Parks, C.V.

    2000-09-01T23:59:59.000Z

    This research examines the practice of equating the reactivity of spent fuel to that of fresh fuel for the purpose of performing burnup credit criticality safety analyses for PWR spent fuel pool (SFP) storage conditions. The investigation consists of comparing k{sub inf} estimates based on reactivity equivalent fresh fuel enrichment (REFFE) to k{sub inf} estimates using the actual spent fuel isotopics. Analyses of selected storage configurations common in PWR SFPs show that this practice yields nonconservative results (on the order of a few tenths of a percent) in configurations in which the spent fuel is adjacent to higher-reactivity assemblies (e.g., fresh or lower-burned assemblies) and yields conservative results in configurations in which spent fuel is adjacent to lower-reactivity assemblies (e.g., higher-burned fuel or empty cells). When the REFFE is determined based on unborated water moderation, analyses for storage conditions with soluble boron present reveal significant nonconservative results associated with the use of the REFFE. This observation is considered to be important, especially considering the recent allowance of credit for soluble boron up to 5% in reactivity. Finally, it is shown that the practice of equating the reactivity of spent fuel to fresh fuel is acceptable, provided the conditions for which the REFFE was determined remain unchanged. Determination of the REFFE for a reference configuration and subsequent use of the REFFE for different configurations violates the basis used for the determination of the REFFE and, thus, may lead to inaccurate, and possibly, nonconservative estimates of reactivity. A significant concentration ({approximately}2000 ppm) of soluble boron is typically (but not necessarily required to be) present in PWR SFPs, of which only a portion ({le} 500 ppm) may be credited in safety analyses. Thus, a large subcritical margin currently exists that more than accounts for errors or uncertainties associated with the use of the REFFE. Consequently, the findings presented here do not represent a significant safety concern unless/until the subcritical margin associated with the soluble boron (that is not currently explicitly credited) is offset by the uncertainties associated with burnup credit and/or the expanded allowance of credit for the soluble boron.

  6. Bipolar pulse forming line

    DOE Patents [OSTI]

    Rhodes, Mark A. (Pleasanton, CA)

    2008-10-21T23:59:59.000Z

    A bipolar pulse forming transmission line module for linear induction accelerators having first, second, third, fourth, and fifth planar conductors which form an interleaved stack with dielectric layers between the conductors. Each conductor has a first end, and a second end adjacent an acceleration axis. The first and second planar conductors are connected to each other at the second ends, the fourth and fifth planar conductors are connected to each other at the second ends, and the first and fifth planar conductors are connected to each other at the first ends via a shorting plate adjacent the first ends. The third planar conductor is electrically connectable to a high voltage source, and an internal switch functions to short a high voltage from the first end of the third planar conductor to the first end of the fourth planar conductor to produce a bipolar pulse at the acceleration axis with a zero net time integral. Improved access to the switch is enabled by an aperture through the shorting plate and the proximity of the aperture to the switch.

  7. EC Transmission Line Materials

    SciTech Connect (OSTI)

    Bigelow, Tim S [ORNL

    2012-05-01T23:59:59.000Z

    The purpose of this document is to identify materials acceptable for use in the US ITER Project Office (USIPO)-supplied components for the ITER Electron cyclotron Heating and Current Drive (ECH&CD) transmission lines (TL), PBS-52. The source of material property information for design analysis shall be either the applicable structural code or the ITER Material Properties Handbook. In the case of conflict, the ITER Material Properties Handbook shall take precedence. Materials selection, and use, shall follow the guidelines established in the Materials Assessment Report (MAR). Materials exposed to vacuum shall conform to the ITER Vacuum Handbook. [Ref. 2] Commercial materials shall conform to the applicable standard (e.g., ASTM, JIS, DIN) for the definition of their grade, physical, chemical and electrical properties and related testing. All materials for which a suitable certification from the supplier is not available shall be tested to determine the relevant properties, as part of the procurement. A complete traceability of all the materials including welding materials shall be provided. Halogenated materials (example: insulating materials) shall be forbidden in areas served by the detritiation systems. Exceptions must be approved by the Tritium System and Safety Section Responsible Officers.

  8. Decay Heat Calculations for PWR and BWR Assemblies Fueled with Uranium and Plutonium Mixed Oxide Fuel using SCALE

    SciTech Connect (OSTI)

    Ade, Brian J [ORNL; Gauld, Ian C [ORNL

    2011-10-01T23:59:59.000Z

    In currently operating commercial nuclear power plants (NPP), there are two main types of nuclear fuel, low enriched uranium (LEU) fuel, and mixed-oxide uranium-plutonium (MOX) fuel. The LEU fuel is made of pure uranium dioxide (UO{sub 2} or UOX) and has been the fuel of choice in commercial light water reactors (LWRs) for a number of years. Naturally occurring uranium contains a mixture of different uranium isotopes, primarily, {sup 235}U and {sup 238}U. {sup 235}U is a fissile isotope, and will readily undergo a fission reaction upon interaction with a thermal neutron. {sup 235}U has an isotopic concentration of 0.71% in naturally occurring uranium. For most reactors to maintain a fission chain reaction, the natural isotopic concentration of {sup 235}U must be increased (enriched) to a level greater than 0.71%. Modern nuclear reactor fuel assemblies contain a number of fuel pins potentially having different {sup 235}U enrichments varying from {approx}2.0% to {approx}5% enriched in {sup 235}U. Currently in the United States (US), all commercial nuclear power plants use UO{sub 2} fuel. In the rest of the world, UO{sub 2} fuel is still commonly used, but MOX fuel is also used in a number of reactors. MOX fuel contains a mixture of both UO{sub 2} and PuO{sub 2}. Because the plutonium provides the fissile content of the fuel, the uranium used in MOX is either natural or depleted uranium. PuO{sub 2} is added to effectively replace the fissile content of {sup 235}U so that the level of fissile content is sufficiently high to maintain the chain reaction in an LWR. Both reactor-grade and weapons-grade plutonium contains a number of fissile and non-fissile plutonium isotopes, with the fraction of fissile and non-fissile plutonium isotopes being dependent on the source of the plutonium. While only RG plutonium is currently used in MOX, there is the possibility that WG plutonium from dismantled weapons will be used to make MOX for use in US reactors. Reactor-grade plutonium in MOX fuel is generally obtained from reprocessed irradiated nuclear fuel, whereas weapons-grade plutonium is obtained from decommissioned nuclear weapons material and thus has a different plutonium (and other actinides) concentration. Using MOX fuel instead of UOX fuel has potential impacts on the neutronic performance of the nuclear fuel and the design of the nuclear fuel must take these differences into account. Each of the plutonium sources (RG and WG) has different implications on the neutronic behavior of the fuel because each contains a different blend of plutonium nuclides. The amount of heat and the number of neutrons produced from fission of plutonium nuclides is different from fission of {sup 235}U. These differences in UOX and MOX do not end at discharge of the fuel from the reactor core - the short- and long-term storage of MOX fuel may have different requirements than UOX fuel because of the different discharged fuel decay heat characteristics. The research documented in this report compares MOX and UOX fuel during storage and disposal of the fuel by comparing decay heat rates for typical pressurized water reactor (PWR) and boiling water reactor (BWR) fuel assemblies with and without weapons-grade (WG) and reactor-grade (RG) MOX fuel.

  9. User Interfaces 1 Command Line Interfaces

    E-Print Network [OSTI]

    Verschelde, Jan

    User Interfaces 1 Command Line Interfaces getting arguments of the command line a command line 2013 1 / 39 #12;User Interfaces 1 Command Line Interfaces getting arguments of the command line a command line interface to store points fitting points with polyfit of numpy 2 Encapsulation by Object

  10. PWR FLECHT SEASET 21-rod bundle flow blockage task data and analysis report. NRC/EPRI/Westinghouse Report No. 11. Appendices K-P

    SciTech Connect (OSTI)

    Loftus, M.J.; Hochreiter, L.E.; Lee, N.; McGuire, M.F.; Wenzel, A.H.; Valkovic, M.M.

    1982-09-01T23:59:59.000Z

    This report presents data and limited analysis from the 21-Rod Bundle Flow Blockage Task of the Full-Length Emergency Cooling Heat Transfer Separate Effects and Systems Effects Test Program (FLECHT SEASET). The tests consisted of forced and gravity reflooding tests utilizing electrical heater rods with a cosine axial power profile to simulate PWR nuclear core fuel rod arrays. Steam cooling and hydraulic characteristics tests were also conducted. These tests were utilized to determine effects of various flow blockage configurations (shapes and distributions) on reflooding behavior, to aid in development/assessment of computational models in predicting reflooding behavior of flow blockage configurations, and to screen flow blockage configurations for future 163-rod flow blockage bundle tests.

  11. Simulation of a main steam line break with steam generator tube rupture using trace

    SciTech Connect (OSTI)

    Gallardo, S.; Querol, A.; Verdu, G. [Departamento de Ingenieria Quimica Y Nuclear, Universitat Politecnica de Valencia, Camino de Vera s/n, 46022, Valencia (Spain)

    2012-07-01T23:59:59.000Z

    A simulation of the OECD/NEA ROSA-2 Project Test 5 was made with the thermal-hydraulic code TRACE5. Test 5 performed in the Large Scale Test Facility (LSTF) reproduced a Main Steam Line Break (MSLB) with a Steam Generator Tube Rupture (SGTR) in a Pressurized Water Reactor (PWR). The result of these simultaneous breaks is a depressurization in the secondary and primary system in loop B because both systems are connected through the SGTR. Good approximation was obtained between TRACE5 results and experimental data. TRACE5 reproduces qualitatively the phenomena that occur in this transient: primary pressure falls after the break, stagnation of the pressure after the opening of the relief valve of the intact steam generator, the pressure falls after the two openings of the PORV and the recovery of the liquid level in the pressurizer after each closure of the PORV. Furthermore, a sensitivity analysis has been performed to know the effect of varying the High Pressure Injection (HPI) flow rate in both loops on the system pressures evolution. (authors)

  12. Pulse shaping with transmission lines

    DOE Patents [OSTI]

    Wilcox, Russell B. (Oakland, CA)

    1987-01-01T23:59:59.000Z

    A method and apparatus for forming shaped voltage pulses uses passive reflection from a transmission line with nonuniform impedance. The impedance of the reflecting line varies with length in accordance with the desired pulse shape. A high voltage input pulse is transmitted to the reflecting line. A reflected pulse is produced having the desired shape and is transmitted by pulse removal means to a load. Light activated photoconductive switches made of silicon can be utilized. The pulse shaper can be used to drive a Pockels cell to produce shaped optical pulses.

  13. Pulse shaping with transmission lines

    DOE Patents [OSTI]

    Wilcox, R.B.

    1985-08-15T23:59:59.000Z

    A method and apparatus for forming shaped voltage pulses uses passive reflection from a transmission line with nonuniform impedance. The impedance of the reflecting line varies with length in accordance with the desired pulse shape. A high voltage input pulse is transmitted to the reflecting line. A reflected pulse is produced having the desired shape and is transmitted by pulse removal means to a load. Light activated photoconductive switches made of silicon can be utilized. The pulse shaper can be used to drive a Pockels cell to produce shaped optical pulses.

  14. Electrical transmission line diametrical retainer

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT); Fox, Joe (Spanish Fork, UT)

    2004-12-14T23:59:59.000Z

    The invention is a mechanism for retaining an electrical transmission line. In one embodiment of the invention it is a system for retaining an electrical transmission line within down hole components. In accordance with one aspect of the invention, the system includes a plurality of downhole components, such as sections of pipe in a drill string. The system also includes a coaxial cable running between the first and second end of a drill pipe, the coaxial cable having a conductive tube and a conductive core within it. The invention allows the electrical transmission line to with stand the tension and compression of drill pipe during routine drilling cycles.

  15. Transmission Lines Emulating Moving Media

    E-Print Network [OSTI]

    Vehmas, Joni; Tretyakov, Sergei

    2014-01-01T23:59:59.000Z

    In this paper, we show how the electromagnetic phenomena in moving magnetodielectric media can be emulated using artificial composite structures at rest. In particular, we introduce nonreciprocal periodically loaded transmission lines which support waves obeying the same rules as plane electromagnetic waves in moving media. Because the actual physical structure is at rest, in these transmission lines there are no fundamental limitations on the velocity values, which may take values larger than the speed of light or even complex values (considering complex amplitudes in the time-harmonic regime). An example circuit of a unit cell of a "moving" transmission line is presented and analyzed both numerically and experimentally. The special case of composite right/left handed host line is also studied numerically. Besides the fundamental interest, the study is relevant for potential applications in realizing engineered materials for various transformations of electromagnetic fields.

  16. The beauty of laser lines

    E-Print Network [OSTI]

    Kim, Sue-Mie

    1993-01-01T23:59:59.000Z

    A line, the simplest way to express an artist's feelings or interpretation of an object, has its own emotions that an artist can employ for her purpose. Laser light, the most self-concentrated, self-sustained and directed, ...

  17. Authorization of Line Extension (Nebraska)

    Broader source: Energy.gov [DOE]

    Any entity permitted to establish an electric light and power plant, and/or transmission or distribution lines within a city, village, or public electric light and power district, may also extend...

  18. VISAR: Line-imaging interferometer

    SciTech Connect (OSTI)

    Hemsing, W.F.; Mathews, A.R.; Warnes, R.H.; George, M.J.; Whittemore, G.R.

    1991-01-01T23:59:59.000Z

    A line-imaging Velocity Interferometer System for Any Reflector (VISAR) was applied to measure velocity across the diameter of a metal plate explosively accelerated to 5.5 km/s. Amplified, single- frequency laser light was focused to illuminate a line on the metal surface. The line's image was focused through the interferometer to a streak camera that swept in time and recorded directly on film. During the experiment, the Doppler-shift caused motion of the interference fringes. Analysis of the digitized film record yielded a continuum of time-resolved velocity histories. Velocity gradients across the plate that first swept radially inward, then reflected outward, were clearly measured. Increased power provided by the laser amplifier greatly improved the signal-to-noise ratio compared to our previous line VISAR experiments. 5 refs., 8 figs.

  19. Analysis of interconnect microstrip lines

    E-Print Network [OSTI]

    Luong, Giam-Minh

    1992-01-01T23:59:59.000Z

    of the return loss of the slot-coupled microstrip dipole. Section C presents two simulations of the return loss on the slot- coupled rectangular patch antenna. A. Interconnect of Microstrip Lines Several circuits with the geometry of Figure 1 were fabricated.... Experimental and Theoretical Results of the Interconnect Two circuits were designed and fabricated. Each circuit consists of two substrates as shown in Figure 9. One substrate has an open microstrip line etched in one side and an aperture etched...

  20. Fin-line horn antenna

    DOE Patents [OSTI]

    Reindel, John (San Diego, CA)

    1990-01-01T23:59:59.000Z

    A fin line circuit card containing a fin line slot feeds a dipole antenna ich extends a quarterwave outside the waveguide and provides an energy beam focal point at or near the open end of the waveguide. The dipole antenna thus maintains a wide and nearly constant beamwidth, low VSWR and a circular symmetric radiation pattern for use in electronic warfare direction finding and surveillance applications.

  1. ORNL rod-bundle heat-transfer test data. Volume 3. Thermal-hydraulic test facility experimental data report for test 3. 06. 6B - transient film boiling in upflow. [PWR

    SciTech Connect (OSTI)

    Mullins, C.B.; Felde, D.K.; Sutton, A.G.; Gould, S.S.; Morris, D.G.; Robinson, J.J.

    1982-05-01T23:59:59.000Z

    Reduced instrument responses are presented for Thermal-Hyraulic Test Facility (THTF) Test 3.06.6B. This test was conducted by members of the Oak Ridge National Laboratory Pressurized-Water-Reactor (PWR) Blowdown Heat Transfer (BDHT) Separate-Effects Program on August 29, 1980. The objective of the program was to investigate heat transfer phenomena believed to occur in PWR's during accidents, including small and large break loss-of-coolant accidents. Test 3.06.6B was conducted to obtain transient film boiling data in rod bundle geometry under reactor accident-type conditions. The primary purpose of this report is to make the reduced instrument responses for THTF Test 3.06.6B available. Included in the report are uncertainties in the instrument responses, calculated mass flows, and calculated rod powers.

  2. Florida Electric Transmission Line Siting Act (Florida)

    Broader source: Energy.gov [DOE]

    The Transmission Line Siting Act (TLSA) is the states centralized process for licensing electrical transmission lines which; (a) are 230 kV or larger; (b) cross a county line; and, (c) are 15...

  3. Experimental Investigation on the Effects of Coolant Concentration on Sub-Cooled Boiling and Crud Deposition on Reactor Cladding at Prototypical PWR Operating Conditions

    SciTech Connect (OSTI)

    Schultis, J., Kenneth; Fenton, Donald, L.

    2006-10-20T23:59:59.000Z

    Increasing demand for energy necessitates nuclear power units to increase power limits. This implies significant changes in the design of the core of the nuclear power units, therefore providing better performance and safety in operations. A major hindrance to the increase of nuclear reactor performance especially in Pressurized Deionized water Reactors (PWR) is Axial Offset Anomaly (AOA)--the unexpected change in the core axial power distribution during operation from the predicted distribution. This problem is thought to be occur because of precipitation and deposition of lithiated compounds like boric acid (H{sub 2}BO{sub 3}) and lithium metaborate (LiBO{sub 2}) on the fuel rod cladding. Deposited boron absorbs neutrons thereby affecting the total power distribution inside the reactor. AOA is thought to occur when there is sufficient build-up of crud deposits on the cladding during subcooled nucleate boiling. Predicting AOA is difficult as there is very little information regarding the heat and mass transfer during subcooled nucleate boiling. An experimental investigation was conducted to study the heat transfer characteristics during subcooled nucleate boiling at prototypical PWR conditions. Pool boiling tests were conducted with varying concentrations of lithium metaborate (LiBO{sub 2}) and boric acid (H{sub 2}BO{sub 3}) solutions in deionized water. The experimental data collected includes the effect of coolant concentration, subcooling, system pressure and heat flux on pool the boiling heat transfer coefficient. The analysis of particulate deposits formed on the fuel cladding surface during subcooled nucleate boiling was also performed. The results indicate that the pool boiling heat transfer coefficient degrades in the presence of boric acid and lithium metaborate compared to pure deionized water due to lesser nucleation. The pool boiling heat transfer coefficients decreased by about 24% for 5000 ppm concentrated boric acid solution and by 27% for 5000 ppm lithium metaborate solution respectively at the saturation temperature for 1000 psi (68.9 bar) coolant pressure. Boiling tests also revealed the formation of fine deposits of boron and lithium on the cladding surface which degraded the heat transfer rates. The boron and lithium metaborate precipitates after a 5 day test at 5000 ppm concentration and 1000 psi (68.9 bar) operating pressure reduced the heat transfer rate 21% and 30%, respectively for the two solutions.

  4. What can emission lines tell us?

    E-Print Network [OSTI]

    G. Stasinska

    2007-04-03T23:59:59.000Z

    1 Generalities 2 Empirical diagnostics based on emission lines 3 Photoionization modelling 4 Pending questions 5 Appendix: Lists of useful lines and how to deal with them

  5. Dumbarton Express Line DB heading to Stanford Oval. AC Transit Line U on Palm Drive.

    E-Print Network [OSTI]

    Dumbarton Express Line DB heading to Stanford Oval. AC Transit Line U on Palm Drive. Photo: Karl Nielsen Photo: Dong Wang Schedules: AC Transit Line U Dumbarton Express Line DB Connections with BART Transit Line U Line U provides express service between Stanford and the Fremont BART station. Other East

  6. Quasistellar Objects: Intervening Absorption Lines

    E-Print Network [OSTI]

    Jane C. Charlton; Christopher W. Churchill

    2000-05-31T23:59:59.000Z

    We briefly review, at a level appropriate for graduate students and non-specialists, the field of quasar absorption lines (QALs). Emphasis is on the intervening absorbers. We present the anatomy of a quasar spectrum due to various classes of intervening absorption systems, and a brief historical review of each absorber class (Lyman-alpha forest and Lyman limit systems, and metal-line and damped Lyman-alpha absorbers). We also provide several heuristic examples on how the physical properties of both the intergalactic medium and the gaseous environments associated with earlier epoch galaxies can be inferred from QALs. The evolution of these environments from z=4 are discussed.

  7. Probability of pipe fracture in the primary coolant loop of a PWR plant. Volume 5. Probabilistic fracture mechanics analysis. Load Combination Program Project I final report

    SciTech Connect (OSTI)

    Harris, D.O.; Lim, E.Y.; Dedhia, D.D.

    1981-06-01T23:59:59.000Z

    The primary purpose of the Load Combination Program covered in this report is to estimate the probability of a seismic induced LOCA in the primary piping of a commercial pressurized water reactor (PWR). Best estimates, rather than upper bound results are desired. This was accomplished by use of a fracture mechanics model that employs a random distribution of initial cracks in the piping welds. Estimates of the probability of cracks of various sizes initially existing in the welds are combined with fracture mechanics calculations of how these cracks would grow during service. This then leads to direct estimates of the probability of failure as a function of time and location within the piping system. The influence of varying the stress history to which the piping is subjected is easily determined. Seismic events enter into the analysis through the stresses they impose on the pipes. Hence, the influence of various seismic events on the piping failure probability can be determined, thereby providing the desired information.

  8. Spent fuel dry storage technology development: fuel temperature measurements under imposed dry storage conditions (I kW PWR spent fuel assembly)

    SciTech Connect (OSTI)

    Unterzuber, R.; Wright, J.B.

    1980-09-01T23:59:59.000Z

    A spent fuel assembly temperature test under imposed dry storage conditions was conducted at the Engine Maintenance Assembly and Disassembly (E-MAD) facility on the Nevada Test Site in support of spent fuel dry storage technology development. This document presents the test data and results obtained from an approximately 1.0 kW decay heat level PWR spent fuel assembly. A spent fuel test apparatus was designed to utilize a representative stainless steel spent fuel canister, a canister lid containing internal temperature instrumentation to measure fuel cladding temperatures, and a carbon steel liner that encloses the canister and lid. Electrical heaters along the liner length, on the lid, and below the canister are used to impose dry storage canister temperature profiles. Temperature instrumentation is provided on the liner and canister. The liner and canister are supported by a test stand in one of the large hot cells (West Process Cell) inside E-MAD. Fuel temperature measurements have been performed using imposed canister temperature profiles from the electrically heated and spent fuel drywell tests being conducted at E-MAD as well as for four constant canister temperature profiles, each with a vacuum, helium and air backfill. Computer models have been utilized in conjunction with the test to predict the thermal response of the fuel cladding. Computer predictions are presented, and they show good agreement with the test data.

  9. Coiled transmission line pulse generators

    DOE Patents [OSTI]

    McDonald, Kenneth Fox (Columbia, MO)

    2010-11-09T23:59:59.000Z

    Methods and apparatus are provided for fabricating and constructing solid dielectric "Coiled Transmission Line" pulse generators in radial or axial coiled geometries. The pour and cure fabrication process enables a wide variety of geometries and form factors. The volume between the conductors is filled with liquid blends of monomers, polymers, oligomers, and/or cross-linkers and dielectric powders; and then cured to form high field strength and high dielectric constant solid dielectric transmission lines that intrinsically produce ideal rectangular high voltage pulses when charged and switched into matched impedance loads. Voltage levels may be increased by Marx and/or Blumlein principles incorporating spark gap or, preferentially, solid state switches (such as optically triggered thyristors) which produce reliable, high repetition rate operation. Moreover, these Marxed pulse generators can be DC charged and do not require additional pulse forming circuitry, pulse forming lines, transformers, or an a high voltage spark gap output switch. The apparatus accommodates a wide range of voltages, impedances, pulse durations, pulse repetition rates, and duty cycles. The resulting mobile or flight platform friendly cylindrical geometric configuration is much more compact, light-weight, and robust than conventional linear geometries, or pulse generators constructed from conventional components. Installing additional circuitry may accommodate optional pulse shape improvements. The Coiled Transmission Lines can also be connected in parallel to decrease the impedance, or in series to increase the pulse length.

  10. Camera Calibration Using Line Correspondences

    E-Print Network [OSTI]

    Hartley, Richard

    Camera Calibration Using Line Correspondences Richard I. Hartley G.E. CRD, Schenectady, NY, 12301. The three cameras may have different unknown calibrations, and the essential matrices corresponding to each, camera calibration and scene reconstruction. In the case where all the three cameras are assumed to have

  11. Efficient generic on-line/off-line (threshold) signatures without key exposure q

    E-Print Network [OSTI]

    Kim, Kwangjo

    security requirements. 2008 Elsevier Inc. All rights reserved. 1. Introduction The notion of on-line/off-line manufacturing process or as a background computation whenever the card is connected to power, and the on-lineEfficient generic on-line/off-line (threshold) signatures without key exposure q Xiaofeng Chen a

  12. The MICE Muon Beam Line

    SciTech Connect (OSTI)

    Apollonio, Marco [High Energy Physics Group, Department of Physics, Imperial College London SW7 2AZ (United Kingdom)

    2011-10-06T23:59:59.000Z

    In the Muon Ionization Cooling Experiment (MICE) at RAL, muons are produced and transported in a dedicated beam line connecting the production point (target) to the cooling channel. We discuss the main features of the beamline, meant to provide muons with momenta between 140 MeV/c and 240 MeV/c and emittances up to 10 mm rad, which is accomplished by means of a diffuser. Matching procedures to the MICE cooling channel are also described. In summer 2010 we performed an intense data taking campaign to finalize the calibration of the MICE Particle Identification (PID) detectors and the understanding of the beam line, which completes the STEPI phase of MICE. We highlight the main results from these data.

  13. In-line thermoelectric module

    DOE Patents [OSTI]

    Pento, Robert (Algonquin, IL); Marks, James E. (Glenville, NY); Staffanson, Clifford D. (S. Glens Falls, NY)

    2000-01-01T23:59:59.000Z

    A thermoelectric module with a plurality of electricity generating units each having a first end and a second end, the units being arranged first end to second end along an in-line axis. Each unit includes first and second elements each made of a thermoelectric material, an electrically conductive hot member arranged to heat one side of the first element, and an electrically conductive cold member arranged to cool another side of the first element and to cool one side of the second element. The hot member, the first element, the cold member and the second element are supported in a fixture, are electrically connected respectively to provide an electricity generating unit, and are arranged respectively in positions along the in-line axis. The individual components of each generating unit and the respective generating units are clamped in their in-line positions by a loading bolt at one end of the fixture and a stop wall at the other end of the fixture. The hot members may have a T-shape and the cold members an hourglass shape to facilitate heat transfer. The direction of heat transfer through the hot members may be perpendicular to the direction of heat transfer through the cold members, and both of these heat transfer directions may be perpendicular to the direction of current flow through the module.

  14. NATIONALRADIOASTRONOMYOBSERVATORY GREEN BANK ) WEST VIRGINIA

    E-Print Network [OSTI]

    Groppi, Christopher

    . Address bits 7-10 are buffered and sent to the control logic. In addition to the address buss, the output buss (OTB), MSTCL, ERL, RRL, and OCP are also buffered and sent to the control logic. Data ready (DRL gate the input date with a device acknowledge line (DAL) and applies this data to the input buss

  15. Neutronic Analysis of the Burning of Transuranics in Fully Ceramic Micro-Encapsulated Tri-Isotropic Particle-Fuel in a PWR

    SciTech Connect (OSTI)

    Michael A. Pope; R. Sonat Sen; Abderrafi M. Ougouag; Gilles Youinou; Brian Boer

    2012-11-01T23:59:59.000Z

    Calculations have been performed to assess the neutronic behavior of pins of Fully-Ceramic Micro-encapsulated (FCM) fuel in otherwise-conventional Pressurized Water Reactor (PWR) fuel pins. The FCM fuel contains transuranic (TRU) only oxide fuel in tri-isotropic (TRISO) particles with the TRU loading coming from the spent fuel of a conventional LWR after 5 years of cooling. Use of the TRISO particle fuel would provide an additional barrier to fission product release in the event of cladding failure. Depletion calculations were performed to evaluate reactivity-limited burnup of the TRU-only FCM fuel. These calculations showed that due to relatively little space available for fuel, the achievable burnup with these pins alone is quite small. Various reactivity parameters were also evaluated at each burnup step including moderator temperature coefficient (MTC), Doppler, and soluble boron worth. These were compared to reference UO2 and MOX unit cells. The TRU-only FCM fuel exhibits degraded MTC and Doppler coefficients relative to UO2 and MOX. Also, the reactivity effects of coolant voiding suggest that the behavior of this fuel would be similar to a MOX fuel of very high plutonium fraction, which are known to have positive void reactivity. In general, loading of TRU-only FCM fuel into an assembly without significant quantities of uranium presents challenges to the reactor design. However, if such FCM fuel pins are included in a heterogeneous assembly alongside LEU fuel pins, the overall reactivity behavior is dominated by the uranium pins while attractive TRU destruction performance levels in the TRU-only FCM fuel pins is. From this work, it is concluded that use of heterogeneous assemblies such as these appears feasible from a preliminary reactor physics standpoint.

  16. Capillary electrophoresis-fluorescence line narrowing system (CE-FLNS) for on-line structural characterization

    DOE Patents [OSTI]

    Jankowiak, R.J.; Small, G.J.; Shields, P.A.

    1999-04-27T23:59:59.000Z

    Capillary electrophoresis (CE) is interfaced with low temperature fluorescence line-narrowing (FLN) spectroscopy for on-line structural characterization of separated molecular analytes. 21 figs.

  17. Capillary electrophoresis-fluorescence line narrowing system (CE-FLNS) for on-line structural characterization

    DOE Patents [OSTI]

    Jankowiak, Ryszard J. (Ames, IA); Small, Gerald J. (Ames, IA); Shields, Peter A. (Reading, MA)

    1999-04-27T23:59:59.000Z

    Capillary electrophoresis (CE) is interfaced with low temperature fluorescence line-narrowing (FLN) spectroscopy for on-line structural characterization of separated molecular analytes.

  18. FB Line Basis for Interim Operation

    SciTech Connect (OSTI)

    Shedrow, B.

    1998-10-19T23:59:59.000Z

    The safety analysis of the FB-Line Facility indicates that the operation of FB-Line to support the current mission does not present undue risk to the facility and co-located workers, general public, or the environment.

  19. Chromospheric Dynamics and Line Formation

    E-Print Network [OSTI]

    R. Hammer; P. Ulmschneider

    2007-07-14T23:59:59.000Z

    The solar chromosphere is very dynamic, due to the presence of large amplitude hydrodynamic waves. Their propagation is affected by NLTE radiative transport in strong spectral lines, which can in turn be used to diagnose the dynamics of the chromosphere. We give a basic introduction into the equations of NLTE radiation hydrodynamics and describe how they are solved in current numerical simulations. The comparison with observation shows that one-dimensional codes can describe strong brightenings quite well, but the overall chromospheric dynamics appears to be governed by three-dimensional shock propagation.

  20. Line-focus sun trackers

    SciTech Connect (OSTI)

    Gee, R.

    1980-05-01T23:59:59.000Z

    Sun trackers have been a troublesome component for line-focus concentrating collector systems. The problems have included poor accuracy, component failures, false locks on clouds, and restricted tracker operating ranges. In response to these tracking difficulties, a variety of improved sun trackers have been developed. A testing program is underway at SERI to determine the tracking accuracy of this new generation of sun trackers. The three major types of trackers are defined, some recent sun tracker developments are described, and the testing that is underway is outlined.

  1. Radiative transfer in molecular lines

    E-Print Network [OSTI]

    A. Asensio Ramos; J. Trujillo Bueno; J. Cernicharo

    2001-02-15T23:59:59.000Z

    The highly convergent iterative methods developed by Trujillo Bueno and Fabiani Bendicho (1995) for radiative transfer (RT) applications are generalized to spherical symmetry with velocity fields. These RT methods are based on Jacobi, Gauss-Seidel (GS), and SOR iteration and they form the basis of a new NLTE multilevel transfer code for atomic and molecular lines. The benchmark tests carried out so far are presented and discussed. The main aim is to develop a number of powerful RT tools for the theoretical interpretation of molecular spectra.

  2. ShaRE Credit Line

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

    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 742EnergyOnItemResearch > TheNuclearHomelandMultivariate Metal-Organic FrameworksCredit Line

  3. Line Management Perspective: National Nuclear Security Administration...

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

    National Nuclear Security Administration (NNSA) Line Management Perspective: National Nuclear Security Administration (NNSA) Addthis Description Slide Presentation by Jim...

  4. Methods of Using Existing Wire Lines (power lines, phone lines, internet lines) for Totally Secure Classical Communication Utilizing Kirchoff's Law and Johnson-like Noise

    E-Print Network [OSTI]

    Laszlo B. Kish

    2006-10-02T23:59:59.000Z

    We outline some general solutions to use already existing and currently used wire lines, such as power lines, phone lines, internet lines, etc, for the unconditionally secure communication method based on Kirchoff's Law and Johnson-like Noise (KLJN). Two different methods are shown. One is based on filters used at single wires and the other one utilizes a common mode voltage superimposed on a three-phase powerline.

  5. Methods of Using Existing Wire Lines (power lines, phone lines, internet lines) for Totally Secure Classical Communication Utilizing Kirchoff's Law and Johnson-like Noise

    E-Print Network [OSTI]

    Kish, L B

    2006-01-01T23:59:59.000Z

    We outline some general solutions to use already existing and currently used wire lines, such as power lines, phone lines, internet lines, etc, for the unconditionally secure communication method based on Kirchoff's Law and Johnson-like Noise (KLJN). Two different methods are shown. One is based on filters used at single wires and the other one utilizes a common mode voltage superimposed on a three-phase powerline.

  6. Discontinuities in transmission lines and wave guides

    E-Print Network [OSTI]

    Mathis, Harold Fletcher

    1952-01-01T23:59:59.000Z

    DISCONTINUITIES IN TRANSMISSION LINES AND WAVEGUIDES H. F. MATHIS DISCONTINUITIES IN TRANSMISSION LINES AND liVAVNGUIDBS A Thesis By Harola Fletcher htathis Approved as to style and content by: Chairman of Committee DISCONTINUITIES... Subject. Electrical Engineering COHERENT S PAGE I Introduct ion, II Dl. scontlnuit les in Transmission Lines 2 1. Some Seneral char aeter 1 st 1 ca of the transmission lines. . . , . . . , ~ 5 2 ~ 2. Types of dlscontlnuitles ln transmls- sl...

  7. A Roundtable Overview Driving the Top Line

    E-Print Network [OSTI]

    A Roundtable Overview Driving the Top Line #12; 2012 Glassmeyer/McNamee Center for Digital of the Center for Digital Strategies. Driving the Top Line A Thought Leadership Roundtable on Digital, Switzerland for a discussion on how information technology can help companies drive top-line revenue. In many

  8. Cross delay line sensor characterization

    SciTech Connect (OSTI)

    Owens, Israel J [Los Alamos National Laboratory; Remelius, Dennis K [Los Alamos National Laboratory; Tiee, Joe J [Los Alamos National Laboratory; Buck, Steven E [Los Alamos National Laboratory; Whittemore, Stephen R [Los Alamos National Laboratory; Thompson, David C [Los Alamos National Laboratory; Shirey, Robert [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    There exists a wealth of information in the scientific literature on the physical properties and device characterization procedures for complementary metal oxide semiconductor (CMOS), charge coupled device (CCD) and avalanche photodiode (APD) format detectors. Numerous papers and books have also treated photocathode operation in the context of photomultiplier tube (PMT) operation for either non imaging applications or limited night vision capability. However, much less information has been reported in the literature about the characterization procedures and properties of photocathode detectors with novel cross delay line (XDL) anode structures. These allow one to detect single photons and create images by recording space and time coordinate (X, Y & T) information. In this paper, we report on the physical characteristics and performance of a cross delay line anode sensor with an enhanced near infrared wavelength response photocathode and high dynamic range micro channel plate (MCP) gain (> 10{sup 6}) multiplier stage. Measurement procedures and results including the device dark event rate (DER), pulse height distribution, quantum and electronic device efficiency (QE & DQE) and spatial resolution per effective pixel region in a 25 mm sensor array are presented. The overall knowledge and information obtained from XDL sensor characterization allow us to optimize device performance and assess capability. These device performance properties and capabilities make XDL detectors ideal for remote sensing field applications that require single photon detection, imaging, sub nano-second timing response, high spatial resolution (10's of microns) and large effective image format.

  9. Unsplit bipolar pulse forming line

    DOE Patents [OSTI]

    Rhodes, Mark A. (Pleasanton, CA)

    2011-05-24T23:59:59.000Z

    A bipolar pulse forming transmission line module and system for linear induction accelerators having first, second, third, and fourth planar conductors which form a sequentially arranged interleaved stack having opposing first and second ends, with dielectric layers between the conductors. The first and second planar conductors are connected to each other at the first end, and the first and fourth planar conductors are connected to each other at the second end via a shorting plate. The third planar conductor is electrically connectable to a high voltage source, and an internal switch functions to short at the first end a high voltage from the third planar conductor to the fourth planar conductor to produce a bipolar pulse at the acceleration axis with a zero net time integral. Improved access to the switch is enabled by an aperture through the shorting plate and the proximity of the aperture to the switch.

  10. Magnetically insulated transmission line oscillator

    DOE Patents [OSTI]

    Bacon, Larry D. (Albuquerque, NM); Ballard, William P. (Albuquerque, NM); Clark, M. Collins (Albuquerque, NM); Marder, Barry M. (Albuquerque, NM)

    1988-01-01T23:59:59.000Z

    A magnetically insulated transmission line oscillator employs self-generated magnetic fields to generate microwave energy. An anode of the oscillator includes slow-wave structures which are formed of a plurality of thin conductive vanes defining cavities therebetween, and a gap is formed between the anode and a cathode of the oscillator. In response to a pulsed voltage applied to the anode and cathode, self-generated magnetic fields arfe produced in a cross-field orientation with respect to the orientation of the electric field between the anode and the cathode. The cross-field magnetic fields insulate the flow of electrons in the gap and confine the flow of electrons within the gap.

  11. Gamma-Ray Burst Lines

    E-Print Network [OSTI]

    Michael S. Briggs

    1999-10-20T23:59:59.000Z

    The evidence for spectral features in gamma-ray bursts is summarized. As a guide for evaluating the evidence, the properties of gamma-ray detectors and the methods of analyzing gamma-ray spectra are reviewed. In the 1980's, observations indicated that absorption features below 100 keV were present in a large fraction of bright gamma-ray bursts. There were also reports of emission features around 400 keV. During the 1990's the situation has become much less clear. A small fraction of bursts observed with BATSE have statistically significant low-energy features, but the reality of the features is suspect because in several cases the data of the BATSE detectors appear to be inconsistent. Furthermore, most of the possible features appear in emission rather than the expected absorption. Analysis of data from other instruments has either not been finalized or has not detected lines.

  12. Superconducting transmission line particle detector

    DOE Patents [OSTI]

    Gray, Kenneth E. (Naperville, IL)

    1989-01-01T23:59:59.000Z

    A microvertex particle detector for use in a high energy physic collider including a plurality of parallel superconducting thin film strips separated from a superconducting ground plane by an insulating layer to form a plurality of superconducting waveguides. The microvertex particle detector indicates passage of a charged subatomic particle by measuring a voltage pulse measured across a superconducting waveguide caused by the transition of the superconducting thin film strip from a superconducting to a non-superconducting state in response to the passage of a charged particle. A plurality of superconducting thin film strips in two orthogonal planes plus the slow electromagnetic wave propogating in a superconducting transmission line are used to resolve N.sup.2 ambiguity of charged particle events.

  13. Superconducting transmission line particle detector

    DOE Patents [OSTI]

    Gray, K.E.

    1988-07-28T23:59:59.000Z

    A microvertex particle detector for use in a high energy physic collider including a plurality of parallel superconducting thin film strips separated from a superconducting ground plane by an insulating layer to form a plurality of superconducting waveguides. The microvertex particle detector indicates passage of a charged subatomic particle by measuring a voltage pulse measured across a superconducting waveguide caused by the transition of the superconducting thin film strip from a superconducting to a non- superconducting state in response to the passage of a charged particle. A plurality of superconducting thin film strips in two orthogonal planes plus the slow electromagnetic wave propagating in a superconducting transmission line are used to resolve N/sup 2/ ambiguity of charged particle events. 6 figs.

  14. NSLS-II Transport Line Progress

    SciTech Connect (OSTI)

    Fliller R. P.; Wahl, W.; Anderson, A.; Benish, B.; DeBoer, W.; Ganetis, G.; Heese, R.; Hseuh, H.-C.; Hu, J.-P.; Johanson, M.P.; Kosciuk, B.N.; Padrazo, D.; Roy, K.; Shaftan, T.; Singh, O.; Tuozzolo, J.; Wang, G.

    2012-05-20T23:59:59.000Z

    The National Synchrotron Light Source II (NSLS-II) is a state-of-the-art 3-GeV third generation light source currently under construction at Brookhaven National Laboratory. The NSLS-II injection system consists of a 200 MeV linac, a 3-GeV booster synchrotron and associated transfer lines. The first part of the Linac to Booster Transport (LBT) line has been installed for linac commissioning. This part includes all components necessary to commission the NSLS-II linac. The second part of this transport line is undergoing installation. Initial results of hardware commissioning will be discussed. The Booster to Storage Ring (BSR) transport line underwent a design review. The first part of the BSR transport line, consisting of all components necessary to commission the booster will be installed in 2012 for booster commissioning. We report on the final design of the BSR line along with the plan to commission the booster.

  15. Gamma-Ray Line Observations with RHESSI

    E-Print Network [OSTI]

    David M. Smith

    2004-04-30T23:59:59.000Z

    The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) has been observing gamma-ray lines from the Sun and the Galaxy since its launch in February 2002. Here I summarize the status of RHESSI observations of solar lines (nuclear de-excitation, neutron capture, and positron annihilation), the lines of $^{26}$Al and $^{60}$Fe from the inner Galaxy, and the search for positron annihilation in novae.

  16. DOE Sustainability Reporting Open Line Help Call

    Broader source: Energy.gov [DOE]

    The Sustainability Performance Office (SPO) sponsors open line help calls to assist DOE sites and national laboratories with the annual sustainability reporting process. Representatives from the...

  17. Rubber linings answer to many problems

    SciTech Connect (OSTI)

    Mehra, L. [Quality Linings Co., Aurora, CO (United States)

    1998-12-31T23:59:59.000Z

    The uses of rubber linings in different fields industries are discussed.The physical properties of rubber both natural and synthetic rubber are listed and their importance is evaluated. The aging of rubber is discussed in detail, including effects of temperature on aging of rubber. By virtue of its inherent elasticity and chemical resistance, rubber linings have found many uses in the protection of mining equipment, water treatment tanks and vessels, flue gas desulfurization equipment in power plants and varied process and storage vessels in chemical industries. Rubber has found extensive use in civil engineering field as expansion joints and bladders in dams. Electrical resistance of rubber is useful for its application as an insulating material. Rubber is chemically resistant to acids, alkalies and many salt solutions. Rubber linings are therefore used for protection of steel against these acids, alkalies or salt solutions. The extreme elasticity of rubber has been found useful in its application as a lining material in areas subject to high abrasion. Frequently rubber linings are the linings of choice when a combination of abrasion and chemical attack are to be protected against. Constantly, new formulations of rubber lining compounds are being developed just as new chemical processes are being made. The flexibility of compounding and the relative ease of putting layers of different rubber formulations together in multilayered formulations of rubber lining compounds is leading to new uses of this lining material.

  18. Transmission Line Security Monitor: Final Report

    SciTech Connect (OSTI)

    John Svoboda

    2011-04-01T23:59:59.000Z

    The Electric Power Transmission Line Security Monitor System Operational Test is a project funded by the Technical Support Working Group (TSWG). TSWG operates under the Combating Terrorism Technical Support Office that functions under the Department of Defense. The Transmission Line Security Monitor System is based on technology developed by Idaho National Laboratory. The technology provides a means for real-time monitoring of physical threats and/or damage to electrical transmission line towers and conductors as well as providing operational parameters to transmission line operators to optimize transmission line operation. The end use is for monitoring long stretches of transmission lines that deliver electrical power from remote generating stations to cities and industry. These transmission lines are generally located in remote transmission line corridors where security infrastructure may not exist. Security and operational sensors in the sensor platform on the conductors take power from the transmission line and relay security and operational information to operations personnel hundreds of miles away without relying on existing infrastructure. Initiated on May 25, 2007, this project resulted in pre-production units tested in realistic operational environments during 2010. A technology licensee, Lindsey Manufacturing of Azusa California, is assisting in design, testing, and ultimately production. The platform was originally designed for a security monitoring mission, but it has been enhanced to include important operational features desired by electrical utilities.

  19. Emergency Management Lines of Inquiry, April 2008

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

    Inspection Criteria, Activities, and Lines of Inquiry Functional Area: Hazards Survey (HS) and Emergency Planning Hazards Assessment (EPHA) Inspection Criteria: Emergency...

  20. Detonator comprising a nonlinear transmission line

    DOE Patents [OSTI]

    Elizondo-Decanini, Juan M

    2014-12-30T23:59:59.000Z

    Detonators are described herein. In a general embodiment, the detonator includes a nonlinear transmission line that has a variable capacitance. Capacitance of the nonlinear transmission line is a function of voltage on the nonlinear transmission line. The nonlinear transmission line receives a voltage pulse from a voltage source and compresses the voltage pulse to generate a trigger signal. Compressing the voltage pulse includes increasing amplitude of the voltage pulse and decreasing length of the voltage pulse in time. An igniter receives the trigger signal and detonates an explosive responsive to receipt of the trigger signal.

  1. Arizona Transmission Line Siting Committee | 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 EditCalifornia: Energy Resources JumpAnaconda,AnzaArcade,theElectric PwrArizona

  2. BIODIVERSITY Accounting for tree line shift, glacier

    E-Print Network [OSTI]

    Zimmermann, Niklaus E.

    BIODIVERSITY RESEARCH Accounting for tree line shift, glacier retreat and primary succession land cover (tree line shift, glacier retreat and primary succession) into species distribution model. Methods We fit linear mixed effects (LME) models to historical changes in forest and glacier cover

  3. LA NACION LINE Ciencia/Salud

    E-Print Network [OSTI]

    Wilf, Peter

    LA NACION LINE Ciencia/Salud Viernes 4 de Abril de 2003 LA NACION LINE | Ed. Anteriores | 4 de Abril de 2003 | Ciencia/Salud | Nota Estudio del Museo Egidio Feruglio, de Trelew La diversidad vegetal://www.lanacion.com.ar/03/04/04/sl_486019.asp LA NACION | 04/04/2003 | Página 14 | Ciencia/Salud Volver a ediciones

  4. Speed-line for 3D animation

    E-Print Network [OSTI]

    Song, Won Chan

    2007-04-25T23:59:59.000Z

    My thesis describes a tool which creates speed-lines automatically in 3D computer animations. Speed-lines are usually used in comic books to express fast motions in a still image. They are also used in 2D animations. ...

  5. results and benefits... The Bittern Line Carbon

    E-Print Network [OSTI]

    Everest, Graham R

    results and benefits... The Bittern Line Carbon Neutral Stations Transport Regeneration Ltd. June 2008 c a s e s t u d yCRed carbon reduction Project Summary Our client, Transport Regeneration Ltd., aims to make nine stations on the Bittern Line between Norwich and Sheringham carbon neutral

  6. The Linux Command Line Second Internet Edition

    E-Print Network [OSTI]

    Dahl, David B.

    The Linux Command Line Second Internet Edition William E. Shotts, Jr. A LinuxCommand.org Book #12....................................................................................................xvi Why Use The Command Line to their respective owners. This book is part of the LinuxCommand.org project, a site for Linux education and advo

  7. On-line secret sharing Laszlo Csirmaz

    E-Print Network [OSTI]

    Tardos, Gbor

    On-line secret sharing Laszlo Csirmaz Gabor Tardos Abstract In a perfect secret sharing scheme the dealer distributes shares to participants so that qualified subsets can recover the secret, while unqualified subsets have no information on the secret. In an on-line secret sharing scheme the dealer assigns

  8. Optical on line techniques for nuclear applications

    SciTech Connect (OSTI)

    Doizi, D. [CEA, Nuclear Energy Div. DEN, DANS/DPC/SECR/LSRM (France); Pailloux, A.; Maury, C.; Sirven, J. B.; Dauvois, V.; Roujou, J. L.; Rosset, C. D. [CEA, Nuclear Energy Div. DEN, DANS/DPC (France); Hartmann, J. M. [CNRS., UMR 7583, LISA, Creteil (France)

    2011-07-01T23:59:59.000Z

    Optical on line techniques enable non intrusive physical measurements in harsh environments (high temperature, high pressure, radioactivity, ...). Optical absorption spectrometries such as UV-Visible, FTIR, CRDS have been successfully used to study gas phase speciation in different nuclear applications. LIBS which relies on laser matter interactions is a on line optical technique for solids and liquids elementary analysis. (authors)

  9. Design of the ILC RTML extraction lines

    SciTech Connect (OSTI)

    Seletskiy, S.; Tenenbaum, P.; Walz, D.; /SLAC; Solyak, N.; /Fermilab

    2008-06-01T23:59:59.000Z

    The ILC [1] Damping Ring to the Main Linac beamline (RTML) contains three extraction lines (EL). Each EL can be used both for an emergency abort dumping of the beam and tune-up continual train-by-train extraction. Two of the extraction lines are located downstream of the first and second stages of the RTML bunch compressor, and must accept both compressed and uncompressed beam with energy spreads of 2.5% and 0.15%, respectively. In this paper we report on an optics design that allowed minimizing the length of the extraction lines while offsetting the beam dumps from the main line by the distance required for acceptable radiation levels in the service tunnel. The proposed extraction lines can accommodate beams with different energy spreads while at the same time providing the beam size acceptable for the aluminum dump window.

  10. Product Lines that supply other Product Lines: A Service-Oriented Approach Salvador Trujillo

    E-Print Network [OSTI]

    Apel, Sven

    Product Lines that supply other Product Lines: A Service-Oriented Approach Salvador Trujillo@uni-passau.de Abstract A software product line is a family of software products that share a set of core assets with the goal of reuse. In this paper, we focus on a scenario in which different products from different product

  11. Calculating Routes A Long a Line Assumes that lines exist as a shapefile

    E-Print Network [OSTI]

    Brownstone, Rob

    Calculating Routes A Long a Line Assumes that lines exist as a shapefile Step 1 Create a Route from the Line Shapefile Go to ArcToolBox Linear Referencing Tools Create Route. Fill in Fields;Step 4 Convert to Shapefile Make the event file permanent. Right click on the event table

  12. Grand Coulee Transmission Line Replacement Project

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

    by the Bureau of Reclamation to design and construct six new 500-kV overhead transmission lines at Grand Coulee Dam. BPA will replace the existing underground transmission...

  13. Ames Lab 101: Next Generation Power Lines

    ScienceCinema (OSTI)

    Russell, Alan

    2012-08-29T23:59:59.000Z

    Ames Laboratory scientist Alan Russell discusses the need to develop new power lines that are stronger and more conductive as a way to address the problem of the nation's aging and inadequate power grid.

  14. DNA Assembly Line for Nano-Construction

    ScienceCinema (OSTI)

    Oleg Gang

    2010-01-08T23:59:59.000Z

    Building on the idea of using DNA to link up nanoparticles scientists at Brookhaven National Lab have designed a molecular assembly line for high-precision nano-construction. Nanofabrication is essential for exploiting the unique properties of nanoparticl

  15. Lining Over Refractory - Conserve Energy and Capital

    E-Print Network [OSTI]

    Jost, M. L.; Barrows, G. L.

    1980-01-01T23:59:59.000Z

    .~. LINING OVER REFRACTORY - CONSERVE ENERGY & CAPITAL by Mark L. Jost Gerald L. Barrows The Carborundum Company Niagara Falls, New York INTRODUCTION Companies operating industrial heating equip Advantages ment find themselves coming under...

  16. IIR algorithms for adaptive line enhancement

    SciTech Connect (OSTI)

    David, R.A.; Stearns, S.D.; Elliott, G.R.; Etter, D.M.

    1983-01-01T23:59:59.000Z

    We introduce a simple IIR structure for the adaptive line enhancer. Two algorithms based on gradient-search techniques are presented for adapting the structure. Results from experiments which utilized real data as well as computer simulations are provided.

  17. Line Environment, Safety and Health Oversight

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1997-06-26T23:59:59.000Z

    Sets forth the Department's expectations line management environment, safety and health (ES&H) oversight and for the use of contractor self-assessment programs as the cornerstone for this oversight. Canceled by DOE O 226.1.

  18. Electrical Transmission Line Diametrical Retention Mechanism

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT); Fox, Joe (Spanish Fork, UT)

    2006-01-03T23:59:59.000Z

    The invention is a mechanism for retaining an electrical transmission line. In one embodiment of the invention it is a system for retaining an electrical transmission line within downhole components. The invention allows a transmission line to be attached to the internal diameter of drilling components that have a substantially uniform drilling diameter. In accordance with one aspect of the invention, the system includes a plurality of downhole components, such as sections of pipe in a drill string, drill collars, heavy weight drill pipe, and jars. The system also includes a coaxial cable running between the first and second end of a drill pipe, the coaxial cable having a conductive tube and a conductive core within it. The invention allows the electrical transmission line to withstand the tension and compression of drill pipe during routine drilling cycles.

  19. Temperatures in the blast furnace refractory lining

    SciTech Connect (OSTI)

    Hebel, R.; Streuber, C. [Didier-M and P Energietechnik GmbH, Wiesbaden (Germany); Steiger, R. [Didier-M and P Engineering Services, Highland, IN (United States); Jeschar, R. [TU Clausthal (Germany). Inst. fuer Energieverfahrenstechnik und Brennstofftechnik

    1995-12-01T23:59:59.000Z

    The campaign life duration of a blast furnace is mainly determined by the condition of the refractory lining in heavy-duty zones such as the hearth, bosh, belly and lower stack. To achieve a desired lifetime, the temperature of the lining in these areas thereby proved to be the decisive controllable parameter. Low operating temperatures result in prolonged service life and are attained through high cooling efficiency. Besides the refractory grade chosen, the wear profile is mainly determined by the type of cooling system applied and the cooling intensity. Therefore, an appropriate compromise between long service life and energy losses has to be found in each case. In order to predict the service life of a lining it is important to know the wear condition at all times during the campaign. The paper describes the approaches the authors have made so far on European blast furnaces, on a theoretical and practical basis, on how to analyze the lining wear.

  20. Gila to North Gila Transmission Line Rebuild

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

    the new APS line. Western's land action entails acquiring up to an additional 50 feet right-of-way adjacent to the existing Gila Knob ROW, transferring a portion of the Gila...

  1. Heat-Traced Fluid Transfer Lines

    E-Print Network [OSTI]

    Schilling, R. E.

    1984-01-01T23:59:59.000Z

    HEAT-TRACED FLUID TRANSFER LINES Robert E. Schilling, P.E. Eaton Corporation Aurora, Ohio This paper discusses basic considerations in designing a heat tracing system using either steam or electrical tracing. Four basic reasons to heat...

  2. Productivity Improvement of a Manual Assembly Line

    E-Print Network [OSTI]

    Yerasi, Pranavi

    2012-10-19T23:59:59.000Z

    The current project addresses the productivity improvement of a manual assembly line by making use of operations analysis in the framework of Lean production. A methodology is proposed that helps to improve the productivity of any production process...

  3. Ames Lab 101: Next Generation Power Lines

    SciTech Connect (OSTI)

    Russell, Alan

    2010-01-01T23:59:59.000Z

    Ames Laboratory scientist Alan Russell discusses the need to develop new power lines that are stronger and more conductive as a way to address the problem of the nation's aging and inadequate power grid.

  4. What is the Broad Line Region?

    E-Print Network [OSTI]

    Ari Laor

    2003-12-16T23:59:59.000Z

    What is the Broad Line Region (BLR) made of? What determines its location? Why is it sometimes missing? What controls its properties? Some recent results and new approaches which may shed light on these issues are briefly described.

  5. Corona losses in HVdc bipolar lines

    SciTech Connect (OSTI)

    Corbellini, U.; Pelacchi, P. [Univ. of Pisa (Italy). Dept. of Electric Systems and Automation] [Univ. of Pisa (Italy). Dept. of Electric Systems and Automation

    1996-07-01T23:59:59.000Z

    The problem related to the prediction of corona losses in HVdc bipolar lines has been solved, in the past, by means of semi-empirical monomial formulae. However, the proposed formulae that are simpler to use do not always give adequate calculation precision, while the formulae that provide the closest results require implicit functions of different complexity, which are difficult to apply; moreover, it is not possible to understand clearly what influence the variations of the different line parameters have on the losses themselves. The new monomial semi-empirical relationship, proposed to predict the corona losses in HVdc bipolar lines, is very simple to use; it highlights the dependence of power losses due to the corona effect by the different line parameters. The formula has been developed by elaborating a considerable amount of available experimental data.

  6. Design of the ILC RTML Extraction Lines

    SciTech Connect (OSTI)

    Seletskiy, S.; Tenenbaum, P.; Walz, D.; /SLAC; Solyak, N.; /Fermilab

    2011-10-17T23:59:59.000Z

    The ILC [1] Damping Ring to the Main Linac beamline (RTML) contains three extraction lines (EL). Each EL can be used both for an emergency abort dumping of the beam and tune-up continual train-by-train extraction. Two of the extraction lines are located downstream of the first and second stages of the RTML bunch compressor, and must accept both compressed and uncompressed beam with energy spreads of 2.5% and 0.15%, respectively. In this paper we report on an optics design that allowed minimizing the length of the extraction lines while offsetting the beam dumps from the main line by the distance required for acceptable radiation levels in the service tunnel. The proposed extraction lines can accommodate beams with different energy spreads while at the same time providing the beam size acceptable for the aluminum dump window. The RTML incorporates three extraction lines, which can be used for either an emergency beam abort or for a train-by-train extraction. The first EL is located downstream of the Damping Ring extraction arc. The other two extraction lines are located downstream of each stage of the two-stage bunch compressor. The first extraction line (EL1) receives 5GeV beam with an 0.15% energy spread. The extraction line located downstream of the first stage of bunch compressor (ELBC1) receives both compressed and uncompressed beam, and therefore must accept beam with both 5 and 4.88GeV energy, and 0.15% and 2.5% energy spread, respectively. The extraction line located after the second stage of the bunch compressor (ELBC2) receives 15GeV beam with either 0.15 or 1.8% energy spread. Each of the three extraction lines is equipped with the 220kW aluminum ball dump, which corresponds to the power of the continuously dumped beam with 5GeV energy, i.e., the beam trains must be delivered to the ELBC2 dump at reduced repetition rate.

  7. MATHEMATICAL ANALYSIS OF CONDUCTING AND SUPERCONDUCTING TRANSMISSION LINES

    E-Print Network [OSTI]

    Ramdani, Karim - Institut de Mathématiques ?lie Cartan, Université Henri Poincaré

    MATHEMATICAL ANALYSIS OF CONDUCTING AND SUPERCONDUCTING TRANSMISSION LINES ANNE-SOPHIE BONNET propagation in the microstrip transmission lines used in microelectronics. In the first part, the case of the perfectly conducting strip. Key words. superconducting transmission lines, waveguides, spectral analysis

  8. On-site rubber lining -- Application of precured and self-curing rubber linings

    SciTech Connect (OSTI)

    Fenner, J. [Keramchemie GmbH, Siershahn (Germany)

    1998-12-31T23:59:59.000Z

    Rubber linings are applied as a corrosion protection system in a wide range of plants and installations of the industrial sector. In addition to the execution of lining works in a workshop, the on-site application of this corrosion protection system on the construction site has gained increasing importance. The various procedures utilized to apply the corrosion protection linings will be briefly presented in the following paper. In particular the precured and self curing rubber linings together with their scope of use and application on construction sites will be described in more detail.

  9. New Construction of Distribution Lines, Service Lines, and Appurtenant Facilities in Residential Subdivisions (New York)

    Broader source: Energy.gov [DOE]

    Any proposed construction of electricity-related facilities in residential subdivisions, including distribution and service lines and appurtenant facilities, is subject to these regulations, which...

  10. O.A.R. 734-055 - Pole Lines, Buried Cables, Pipe lines, Signs...

    Open Energy Info (EERE)

    buried cables, pipe lines, signs miscellaneous operations upon state highway right-of-way and properties under the jurisdiction of the department of transportation. Published N...

  11. EIS-0483: Estes to Flatiron Substation Transmission Lines Rebuild...

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

    EIS-0483: Estes to Flatiron Substation Transmission Lines Rebuild Project, Larimer County, Colorado EIS-0483: Estes to Flatiron Substation Transmission Lines Rebuild Project,...

  12. Request for Information on Permitting of Transmission Lines:...

    Energy Savers [EERE]

    Request for Information on Permitting of Transmission Lines: Federal Register Notice Volume 77, No. 38 - Feb. 27, 2012 Request for Information on Permitting of Transmission Lines:...

  13. EIS-0447: Champlain Hudson Power Express Transmission Line Project...

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

    47: Champlain Hudson Power Express Transmission Line Project, New York EIS-0447: Champlain Hudson Power Express Transmission Line Project, New York Summary This EIS evaluated the...

  14. EA-1880: Big Bend to Witten Transmission Line Project, South...

    Office of Environmental Management (EM)

    880: Big Bend to Witten Transmission Line Project, South Dakota EA-1880: Big Bend to Witten Transmission Line Project, South Dakota Summary The USDA Rural Utilities Service, with...

  15. Transfer Lines to Connect Liquid Waste Facilities and Salt Waste...

    Office of Environmental Management (EM)

    Transfer Lines to Connect Liquid Waste Facilities and Salt Waste Processing Facility Transfer Lines to Connect Liquid Waste Facilities and Salt Waste Processing Facility October...

  16. Glosten Associates Tests Innovative High-Strength Mooring Lines...

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

    Glosten Associates Tests Innovative High-Strength Mooring Lines for Deepwater Offshore Wind Installations Glosten Associates Tests Innovative High-Strength Mooring Lines for...

  17. alpha line profile: Topics by E-print Network

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

    calculations of IP line profiles based on hot model distributions of interplanetary hydrogen. We also find that the line profiles get narrower during solar maximum. The results...

  18. CALiPER Retail Lamps Study RRL3.2 Lumen and Chromaticity Maintenance of LED A lamps Operated in Steady-State Conditions

    SciTech Connect (OSTI)

    Royer, Michael P.; McCullough, Jeffrey J.; Tucker, Joseph C.

    2014-12-01T23:59:59.000Z

    The lumen depreciation and color shift of 17 different A lamps (15 LED, 1 CFL, 1 halogen) was monitored in the automated long-term test apparatus (ALTA) for more than 7,500 hours. Ten samples of each lamp model were tested, with measurements recorded on a weekly basis. The lamps were operated continuously at an ambient temperature of 45C (-1C). Importantly, the steady-state test conditions were not optimized for inducing catastrophic failure for any of the lamp technologiesto which thermal cycling is a strong contributor and are not typical of normal use patternswhich usually include off periods where the lamp cools down. Further, the test conditions differ from those used in standardized long-term test methods (i.e., IES LM-80, IES LM-84), so the results should not be directly compared. On the other hand, the test conditions are similar to those used by ENERGY STAR (when elevated temperature testing is called for). Likewise, the conditions and assumptions used by manufacturers to generated lifetime claims may vary; the CALiPER long-term data is informative, but cannot necessarily be used to discredit manufacturer claims. The test method used for this investigation should be interpreted as one more focused on the long-term effects of elevated temperature operation, at an ambient temperature that is not uncommon in luminaires. On average, the lumen maintenance of the LED lamps monitored in the ALTA was better than benchmark lamps, but there was considerable variation from lamp model to lamp model. While three lamp models had average lumen maintenance above 99% at the end of the study period, two products had average lumen maintenance below 65%, constituting a parametric failure. These two products, along with a third, also exhibited substantial color shift, another form of parametric failure. While none of the LED lamps exhibited catastrophic failureand all of the benchmarks didthe early degradation of performance is concerning, especially with a new technology trying to build a reputation with consumers. Beyond the observed parametric failures nearly half of the products failed to meet early-life thresholds for lumen maintenance, which were borrowed from ENERGY STAR specifications. That is, the lumen maintenance was sufficiently low at 6,000 hours that seven of the products are unlikely to have lumen maintenance above 70% at their rated lifetime (which was usually 25,000 hours). Given the methods used for this investigationmost notably continuous operationthe results should not be interpreted as indicative of a lamps performance in a typical environment. Likewise, these results are not directly relatable to manufacturer lifetime claims. This report is best used to understand the variation in LED product performance, compare the robustness of LED lamps and benchmark conventional lamps, and understand the characteristics of lumen and chromaticity change. A key takeaway is that the long-term performance of LED lamps can vary greatly from model to model (i.e., the technology is not homogenous), although the lamp-to-lamp consistency within a given model is relatively good. Further, operation of LED lamps in an enclosed luminaire (or otherwise in high ambient temperatures), can induce parametric failure of LEDs much earlier than their rated lifetime; manufacturer warnings about such conditions should be followed if performance degradation is unacceptable.

  19. Dynamic Line Rating: Research and Policy Evaluation

    SciTech Connect (OSTI)

    Jake P. Gentle; Kurt S. Myers; Michael R. West

    2014-07-01T23:59:59.000Z

    Dynamic Line Rating (DLR) is a smart grid technology that allows the rating of electrical conductors to be increased based on local weather conditions. Overhead lines are conventionally given a conservative rating based on worst case scenarios. We demonstrate that observing the conditions in real time leads to additional capacity and safer operation. This paper provides a report of a pioneering scheme in the United States of America in which DLR has been applied. Thereby, we demonstrate that observing the local weather conditions in real time leads to additional capacity and safer operation. Secondly, we discuss limitations involved. In doing so, we arrive at novel insights which will inform and improve future DLR projects. Third, we provide a policy background and discussion to clarify the technologys potential and identifies barriers to the imminent adoption of dynamic line rating systems. We provide suggestions for regulatory bodies about possible improvements in policy to encourage adoption of this beneficial technology.

  20. Masking line foregrounds in intensity mapping surveys

    E-Print Network [OSTI]

    Breysse, Patrick C; Kamionkowski, Marc

    2015-01-01T23:59:59.000Z

    We address the problem of line confusion in intensity mapping surveys and explore the possibility to mitigate line foreground contamination by progressively masking the brightest pixels in the observed map. We consider experiments targeting CO(1-0) at $z=3$, Ly$\\alpha$ at $z=7$, and CII at $z=7$, and use simulated intensity maps, which include both clustering and shot noise components of the signal and possible foregrounds, in order to test the efficiency of our method. We find that for CO and Ly$\\alpha$ it is quite possible to remove most of the foreground contribution from the maps via only 1%-3% pixel masking. The CII maps will be more difficult to clean, however, due to instrumental constraints and the high-intensity foreground contamination involved. While the masking procedure sacrifices much of the astrophysical information present in our maps, we demonstrate that useful cosmological information in the targeted lines can be successfully retrieved.

  1. Critical line of the deconfinement phase transition

    E-Print Network [OSTI]

    M. I. Gorenstein; M. Gazdzicki; W. Greiner

    2005-05-17T23:59:59.000Z

    Phase diagram of strongly interacting matter is discussed within the exactly solvable statistical model of the quark-gluon bags. The model predicts two phases of matter: the hadron gas at a low temperature T and baryonic chemical potential muB, and the quark-gluon gas at a high T and/or muB. The nature of the phase transition depends on a form of the bag mass-volume spectrum (its pre-exponential factor), which is expected to change with the muB/T ratio. It is therefore likely that the line of the 1st} order transition at a high muB/T ratio is followed by the line of the 2nd order phase transition at an intermediate muB/T, and then by the lines of "higher order transitions" at a low muB/T.

  2. Load-resistant coaxial transmission line

    DOE Patents [OSTI]

    Hall, David R.; Fox, Joe

    2006-01-03T23:59:59.000Z

    A transmission line for downhole tools that make up all or part of a tool string for drilling and production of oil, gas, and geothermal wells that can withstand the dynamic gravitational forces and other accelerations associated with downhole excavations. The transmission line has a metal tube, or outer conductor, that houses a coaxial wire inner conductor. A non-metallic dielectric material is interposed between the inner and outer conductors. The outer and inner conductors and the dielectric are sufficiently compressed together so that independent motion between them is abated. Compression of the components of the transmission line may be achieved by drawing the transmission through one or more dies in order to draw down the outer conductor onto the dielectric, or by expanding the inner conductor against the dielectric using a mandrel or hydraulic pressure. Non-metallic bead segments may be used in aid of the compression necessary to resist the dynamic forces and accelerations of drilling.

  3. Relativistic emission lines from accreting black holes - The effect of disk truncation on line profiles

    E-Print Network [OSTI]

    Andreas Mueller; Max Camenzind

    2003-09-30T23:59:59.000Z

    Relativistic emission lines generated by thin accretion disks around rotating black holes are an important diagnostic tool for testing gravity near the horizon. The iron K-line is of special importance for the interpretation of the X-ray emission of Seyfert galaxies, quasars and galactic X-ray binary systems. A generalized kinematic model is presented which includes radial drifts and non-Keplerian rotations for the line emitters. The resulting line profiles are obtained with an object-oriented ray tracer operating in the curved Kerr background metric. The general form of the Doppler factor is presented which includes all kinds of poloidal and toroidal motions near the horizon. The parameters of the model include the spin parameter, the inclination, the truncation and outer radius of the disk, velocity profiles for rotation and radial drift, the emissivity profile and a multi-species line-system. The red wing flux is generally reduced when radial drift is included as compared to the pure Keplerian velocity field. All resulting emission line profiles can be classified as triangular, double-horned, double-peaked, bumpy and shoulder-like. Of particular interest are emission line profiles generated by truncated standard accretion disks (TSD). It is also shown that the emissivity law has a great influence on the profiles. The characteristic shoulder-like line profile observed for the Seyfert galaxy MCG-6-30-15 can be reproduced for suitable parameters

  4. Abstract--Power Line Communications (PLC) is used for information exchange over the lines

    E-Print Network [OSTI]

    Boyer, Edmond

    Abstract-- Power Line Communications (PLC) is used for information exchange over the lines installed for delivering the electrical power. Inhome PLC is a technology which delivers telecom services to every corner of a household through already existing electrical wiring. In recent years, PLC has emerged

  5. New Construction of Distribution Lines, Service Lines, and Appurtenant Facilities in Certain Visually Significant Resources Outside Residential Subdivisions (New York)

    Broader source: Energy.gov [DOE]

    Any proposed construction of distribution lines, service lines, and appurtenant facilities to electric utilities located near scenic areas of statewide significance, including Adirondack park...

  6. An analysis of multiple component mooring lines

    E-Print Network [OSTI]

    Walters, Thomas Robert

    1977-01-01T23:59:59.000Z

    -5 Tension At Excursion Parameter Response--Weight Parameter 0. 2; Pretension Parameter 16 38 6-6 Line Length Parameter Response-- Weight Parameter 0. 2; Pretension Parameter 16 39 6-7 Excursion Parameter Response-- Weight Parameter 0. 2; Pretension... Parameter 2 40 6-8 Anchor Load Parameter Response-- Weight Parameter 0. 2; Pretension Parameter 2 41 6-9 Tension At Excursion Parameter Response--Weight Parameter 0. 2; Pretension Parameter 2 6-'I 0 Line Length Parameter Response-- Weight Parameter 0...

  7. Boron-10 Lined Proportional Counter Wall Effects

    SciTech Connect (OSTI)

    Siciliano, Edward R.; Kouzes, Richard T.

    2012-05-01T23:59:59.000Z

    The Department of Energy Office of Nuclear Safeguards (NA-241) is supporting the project 'Coincidence Counting With Boron-Based Alternative Neutron Detection Technology' at Pacific Northwest National Laboratory (PNNL) for development of an alternative neutron coincidence counter. The goal of this project is to design, build and demonstrate a boron-lined proportional tube based system in the configuration of a coincidence counter. This report provides information about how variations in proportional counter radius and gas pressure in a typical coincident counter design might affect the observed signal from boron-lined tubes. A discussion comparing tubes to parallel plate counters is also included.

  8. Inductive gas line for pulsed lasers

    DOE Patents [OSTI]

    Benett, William J. (Livermore, CA); Alger, Terry W. (Tracy, CA)

    1985-01-01T23:59:59.000Z

    A gas laser having a metal inlet gas feed line assembly shaped as a coil, to function as an electrical inductance and therefore high impedance to pulses of electric current applied to electrodes at opposite ends of a discharge tube of a laser, for example. This eliminates a discharge path for the laser through the inlet gas feed line. A ferrite core extends through the coil to increase the inductance of the coil and provide better electric isolation. By elimination of any discharge breakdown through the gas supply, efficiency is increased and a significantly longer operating lifetime of the laser is provided.

  9. Inductive gas line for pulsed lasers

    DOE Patents [OSTI]

    Benett, W.J.; Alger, T.W.

    1982-09-29T23:59:59.000Z

    A gas laser having a metal inlet gas feed line assembly shaped as a coil, to function as an electrical inductance and therefore high impedance to pulses of electric current applied to electrodes at opposite ends of a discharge tube of a laser, for example. This eliminates a discharge path for the laser through the inlet gas feed line. A ferrite core extends through the coil to increase the inductance of the coil and provide better electric isolation. By elimination of any discharge breakdown through the gas supply, efficiency is increased and a significantly longer operating lifetime of the laser is provided.

  10. Experiences with On-Line STEAMPOP

    E-Print Network [OSTI]

    Nath, R.; Libby, D. J.; Marcinkowska, A. R.; Skarke, S. C.; Thomasson, M. J.; Worsham, B. A.

    SUBSYSTEM Several types of fuel are usually available in the plant (Figure 3). For each gaseous fuel, there may be headers at various pressure levels. The external supplies of fuel feed into some of these headers. There are also PRVs connecting some... optimization, and extended ENERGYPOP for joint optimization of a process unit with the plant utility system [4 J ? All of these optimizers are off-line programs. Our long-term goal is to have the plant wide optimizer running in an on-line mode so...

  11. Concurrent Wind Cooling in Power Transmission Lines

    SciTech Connect (OSTI)

    Jake P Gentle

    2012-08-01T23:59:59.000Z

    Idaho National Laboratory and the Idaho Power Company, with collaboration from Idaho State University, have been working on a project to monitor wind and other environmental data parameters along certain electrical transmission corridors. The combination of both real-time historical weather and environmental data is being used to model, validate, and recommend possibilities for dynamic operations of the transmission lines for power and energy carrying capacity. The planned results can also be used to influence decisions about proposed design criteria for or upgrades to certain sections of the transmission lines.

  12. Ionization Chambers in the FLASH Dump Line

    E-Print Network [OSTI]

    . 7, 2010FLASH Seminar, Dec. 7, 2010 BPM 13DUMP Dump Line Upgrade 2009Dump Line Upgrade 2009 BPM 9DUMP BPM 5DUMP Toroid 9DUMP OTR screen 9DUMP BLM 14DUMP BLM 13.1DUMP 13.2DUMP BLM 9DUMP BLM 6DUMP BLM 1.1DUMP 1.2DUMP BPM 10DUMP BPM 16DUMP 8 x BHM 16DUMP BLM 14R.DUMP 14L.DUMP 14U.DUMP 14D.DUMP Ionization

  13. EC Transmission Line Risk Identification and Analysis

    SciTech Connect (OSTI)

    Bigelow, Tim S [ORNL

    2012-04-01T23:59:59.000Z

    The purpose of this document is to assist in evaluating and planning for the cost, schedule, and technical project risks associated with the delivery and operation of the EC (Electron cyclotron) transmission line system. In general, the major risks that are anticipated to be encountered during the project delivery phase associated with the implementation of the Procurement Arrangement for the EC transmission line system are associated with: (1) Undefined or changing requirements (e.g., functional or regulatory requirements) (2) Underperformance of prototype, first unit, or production components during testing (3) Unavailability of qualified vendors for critical components Technical risks associated with the design and operation of the system are also identified.

  14. Line formation in AGB atmospheres including velocity effects. Molecular line profile variations of long period variables

    E-Print Network [OSTI]

    Nowotny, W; Aringer, B

    2010-01-01T23:59:59.000Z

    The atmospheres of evolved red giants are considerably influenced by pulsations of the stellar interiors and developing stellar winds. The resulting complex velocity fields severely affect molecular line profiles observable in NIR spectra. With the help of model calculations the complex line formation process in AGB atmospheres was explored with the focus on velocity effects. Furthermore, we aimed for atmospheric models which are able to quantitatively reproduce line profile variations found in observed spectra of pulsating late-type giants. Models describing pulsation-enhanced dust-driven winds were used to compute synthetic spectra under the assumptions of chemical equilibrium and LTE and by solving the radiative transfer in spherical geometry including velocity effects. Radial velocities derived from Doppler-shifted synthetic line profiles provide information on the gas velocities in the line-forming region of the spectral features. On the basis of dynamic models we investigated in detail the finding that ...

  15. Comparing the performace of f1 testers versus their inbred line parents in evaluating experimental sorghum b and r lines in testcrosses.

    E-Print Network [OSTI]

    Packer, Daniel Jacob

    2009-05-15T23:59:59.000Z

    An appropriate tester correctly identifies the relative performance of experimental lines while maximizing the differences between lines. Most sorghum breeding programs use elite inbred lines testers. Inbred line testers evaluate experimental lines...

  16. Geomembranes for Canal Lining Geosynthetics 2009

    E-Print Network [OSTI]

    for this application including PVC, HDPE, LDPE, CSPE, and EPDM geomembranes. Frequently these geomembranes require for canal liners based on field test programs. The first such test program was started with a PVC test to evaluate the effectiveness of a range of canal lining alternatives. Traditionally, PVC geomembranes have

  17. Community Trees Power Lines and Trees

    E-Print Network [OSTI]

    Koford, Rolf R.

    aesthetic and psychological benefits. Figure 2. Grown into a power pole. #12;become hazardous to peopleCommunity Trees Power Lines and Trees Introduction Trees serve many purposes in urban and rural, hundreds of people throughout the United States are injured or killed each year when they climb or prune

  18. The Arctic Tree Line and Climate Change

    E-Print Network [OSTI]

    Blouin-Demers, Gabriel

    ­ Compared the spruce treeline between 1947 and 1989 ­ Used remote sensing applications ­ Mean temperature cover - Causes surface heating Forest Tundra Chapin et al., (2005), 10 Nadezhda et al., (2008) Albedo) ­Heating effect exceeds cooling effect ­Advances in the tree line are causing global warming to occur even

  19. Microstrip transmission line tapers on ferrites

    SciTech Connect (OSTI)

    Albuquerque, M.R.; dAssuncao, A.G.; Lima, F. [Departamento de Engenharia Eletrica, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN (Brazil)] [Departamento de Engenharia Eletrica, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN (Brazil)

    1997-04-01T23:59:59.000Z

    The spectral domain approach is employed to perform a theoretical investigation of tapered microstrip lines on magnetized ferrite substrates. A linear variation of the conducting strip width along the direction of propagation is considered. The analysis takes into account the effects of the applied dc magnetic bias field in the transmission characteristics of these structures. The properties of the taper are determined by a model based on a segmentation of the considered line into uniform microstrip line subsections. Normalized phase constants and characteristic impedances are obtained by using the Hertz vector potentials method and Galerkin numerical technique. Numerical results are presented to show the taper input parameters as a function of the load impedance, geometrical dimensions, operating frequency, and ferrite parameters, considering the orientation and magnitude changes of the biasing magnetic-field {bold H}{sub 0}. The results agree fairly well with those available in the literature for tapered microstrip lines on isotropic dielectric substrates. {copyright} {ital 1997 American Institute of Physics.}

  20. GLOBAL LINE PROFILE ASYMMETRIES IN DISK GALAXIES

    E-Print Network [OSTI]

    Bershady, Matthew A.

    GLOBAL LINE PROFILE ASYMMETRIES IN DISK GALAXIES David R. Andersen1, Matthew A. Bershady2 1NRC profiles of 39 disk galaxies with H i and H ii data. We find good agreement between the first and second mo- ments of the profiles and recession and rotation velocities, respectively. The shapes of H i and H ii

  1. Dielectronic recombination lines of C{sup +}

    SciTech Connect (OSTI)

    Sochi, Taha, E-mail: taha.sochi@kcl.ac.uk; Storey, Peter J.

    2013-11-15T23:59:59.000Z

    The present paper presents atomic data generated to investigate the recombination lines of C II in the spectra of planetary nebulae. These data include energies of bound and autoionizing states, oscillator strengths and radiative transition probabilities, autoionization probabilities, and recombination coefficients. The R-matrix method of electron scattering theory was used to describe the C{sup 2+} plus electron system.

  2. On line chemical composition of analyzer development

    SciTech Connect (OSTI)

    Not Available

    1992-01-01T23:59:59.000Z

    This status report details progress made on the development of an on-line chemical analyzer. Dynamic studies of the distillation column, approval of testing plans, installation of a sample cell and raman analyzer, design of computerized control systems are described. Information on seminars and published papers is also included. (GHH)

  3. Calibration for Frequencies of Stellar Spectral Lines

    E-Print Network [OSTI]

    Gomez, Juana

    2010-07-14T23:59:59.000Z

    to approximately three degrees Celsius. White Light-Emitting Diodes (LED?s) were used as light input. Light traveled through the bromine cell. The blue line corresponds to the initial measurement of the signal traveling through air, which only shows an almost...

  4. TRIBAND BRANCH LINE COUPLER USING DOUBLE-LORENTZ

    E-Print Network [OSTI]

    Nam, Sangwook

    TRIBAND BRANCH LINE COUPLER USING DOUBLE-LORENTZ TRANSMISSION LINES Hanseung Lee and Sangwook Nam) transmission lines (TL) provides two additional degrees of freedom in realizing triband microwave devices-Lorentz; transmission lines; triband; directional couplers 1. INTRODUCTION The concept of artificial TLs having

  5. Command Line Arguments in Ada95 Mark Allen Weiss

    E-Print Network [OSTI]

    Weiss, Mark Allen

    Command Line Arguments in Ada95 Mark Allen Weiss School of Computer Science Florida International (additional) arguments: ''­w'' and ''echo args.adb''. These are known as command line arguments. Command line on a command line can be accessed in an Ada program. In Ada83 there was no standard way of doing this. Ada95

  6. Line profile and continuum variability in the very broad-line Seyfert galaxy Mrk 926

    E-Print Network [OSTI]

    Kollatschny, W

    2010-01-01T23:59:59.000Z

    We present results of an intensive spectroscopic variability campaign of the very broad-line Seyfert 1 galaxy Mrk 926. Our aim is to investigate the broad-line region (BLR) by studying the intensity and line profile variations of this galaxy on short timescales. High signal-to-noise ratio(S/N) spectra were taken with the 9.2m Hobby-Eberly Telescope (HET) in identical conditions during two observing campaigns in 2004 and 2005. After the spectral reduction and internal calibration we achieved a relative flux accuracy of better than 1\\%. The rms profiles of the very broad Balmer lines have shapes that differ from their mean line profiles, consisting of two inner (v $\\lesssim \\pm{}$ 6~000 km s$^{-1}$) and two outer (v $\\gtrsim \\pm{}$ 6~000 km s$^{-1}$) line components in addition to a central component (v $\\lesssim \\pm{}$ 600 km s$^{-1}$). These outer and inner line segments varied with different amplitudes during our campaign. The radius of the BLR is very small with an upper limit of 2~light-days for the H$\\bet...

  7. Multi-transmission-line-beam interactive system

    SciTech Connect (OSTI)

    Figotin, Alexander; Reyes, Guillermo [Department of Mathematics, University of California at Irvine, Irvine, California 92697-3875 (United States)] [Department of Mathematics, University of California at Irvine, Irvine, California 92697-3875 (United States)

    2013-11-15T23:59:59.000Z

    We construct here a Lagrangian field formulation for a system consisting of an electron beam interacting with a slow-wave structure modeled by a possibly non-uniform multiple transmission line (MTL). In the case of a single line we recover the linear model of a traveling wave tube due to J. R. Pierce. Since a properly chosen MTL can approximate a real waveguide structure with any desired accuracy, the proposed model can be used in particular for design optimization. Furthermore, the Lagrangian formulation provides: (i) a clear identification of the mathematical source of amplification, (ii) exact expressions for the conserved energy and its flux distributions obtained from the Noether theorem. In the case of uniform MTLs we carry out an exhaustive analysis of eigenmodes and find sharp conditions on the parameters of the system to provide for amplifying regimes.

  8. Giant vacuum forces via transmission lines

    E-Print Network [OSTI]

    Ephraim Shahmoon; Igor Mazets; Gershon Kurizki

    2014-07-23T23:59:59.000Z

    Quantum electromagnetic fluctuations induce forces between neutral particles, known as the van der Waals (vdW) and Casimir interactions. These fundamental forces, mediated by virtual photons from the vacuum, play an important role in basic physics and chemistry, and in emerging technologies involving, e.g. micro-electromechanical systems or quantum information processing. Here we show that these interactions can be enhanced by many orders of magnitude upon changing the character of the mediating vacuum-modes. By considering two polarizable particles in the vicinity of any standard electric transmission line, along which photons can propagate in one dimension (1d), we find a much stronger and longer-range interaction than in free-space. This enhancement may have profound implications on many-particle and bulk systems, and impact the quantum technologies mentioned above. The predicted giant vacuum force is estimated to be measurable in a coplanar waveguide line.

  9. Line-imaging Fabry-Perot interferometer

    SciTech Connect (OSTI)

    Mathews, A.R.; Warnes, R.H.; Hemsing, W.F.; Whittemore, G.R.

    1990-01-01T23:59:59.000Z

    A method for measuring the velocity history of a line element on a shock-loaded solid has been demonstrated. Light from single-frequency laser is focused through a cylindrical lens to a line on a moving target. The return Doppler-shifted image is passed through a Fabry-Perot interferometer. Because only specific combinations of incident light angle and frequency can pass through the interferometer the output is an incomplete image of the moving target appearing as a set of fringes. This image is focused onto an electronic streak camera and swept in time. The fringe pattern changes with time as the target surface moves, allowing determination of velocity for each point on the target that forms a fringe. Because the velocity can only be measured at the fringe positions, it is necessary to use an interpolating polynomial to obtain a continuous function of time and velocity along the sampled lien. 9 refs., 7 figs.

  10. In-line real time air monitor

    DOE Patents [OSTI]

    Wise, Marcus B. (Kingston, TN); Thompson, Cyril V. (Knoxville, TN)

    1998-01-01T23:59:59.000Z

    An in-line gas monitor capable of accurate gas composition analysis in a continuous real time manner even under strong applied vacuum conditions operates by mixing an air sample with helium forming a sample gas in two complementary sample loops embedded in a manifold which includes two pairs of 3-way solenoid valves. The sample gas is then analyzed in an ion trap mass spectrometer on a continuous basis. Two valve drivers actuate the two pairs of 3-way valves in a reciprocating fashion, so that there is always flow through the in-line gas monitor via one or the other of the sample loops. The duty cycle for the two pairs of 3-way valves is varied by tuning the two valve drivers to a duty cycle typically between 0.2 to 0.7 seconds.

  11. In-line real time air monitor

    DOE Patents [OSTI]

    Wise, M.B.; Thompson, C.V.

    1998-07-14T23:59:59.000Z

    An in-line gas monitor capable of accurate gas composition analysis in a continuous real time manner even under strong applied vacuum conditions operates by mixing an air sample with helium forming a sample gas in two complementary sample loops embedded in a manifold which includes two pairs of 3-way solenoid valves. The sample gas is then analyzed in an ion trap mass spectrometer on a continuous basis. Two valve drivers actuate the two pairs of 3-way valves in a reciprocating fashion, so that there is always flow through the in-line gas monitor via one or the other of the sample loops. The duty cycle for the two pairs of 3-way valves is varied by tuning the two valve drivers to a duty cycle typically between 0.2 to 0.7 seconds. 3 figs.

  12. New Diagnostics in the FLASH Dump Line

    E-Print Network [OSTI]

    Line Status Aug. 2009 BPM 9DUMP BPM 15DUMP BPM 5DUMP Toroid 9DUMP OTR screen 9DUMP BLM 14DUMP BLM 13 at the dump #12;N. Baboi, MDIN. Baboi, MDI FLASH Seminar, Dec. 1, 2009FLASH Seminar, Dec. 1, 2009 Old BPM 15DUMPOld BPM 15DUMP Strange behavior of BPM signals measured impedance from end of cable (in bld. 49): L

  13. Straight-line separation of two polyhedra

    E-Print Network [OSTI]

    Wang, Su-Hua

    1992-01-01T23:59:59.000Z

    1992 ABSTRACT Straight-line Separation of Two Polyhedra. (December 1992) Su-Hua Wang, B. S. , National Chiao Tung University, Taiwan, R. O. C Chair of Advisory Committee: Dr. Jan Wolter The development of automated assembly planning systems has... INTRODUCTION I. A Context Assembly planning is the plan generation problem for assembly tasks and plays an important role in manufacturing systems. The goal of the assembly planning process is to find a plan for moving a set of parts which are initially...

  14. Speed-line for 3D animation

    E-Print Network [OSTI]

    Song, Won Chan

    2007-04-25T23:59:59.000Z

    point moved to a CV on the circle . . . . . . . . . . . . . . 38 39 Ending point placed between the starting point and the goal object . 38 40 Speed-lines with another cartoon effect . . . . . . . . . . . . . . . . . 41 ix FIGURE Page 41 Image sequences... from the result animation . . . . . . . . . . . . . . . 42 1 CHAPTER I INTRODUCTION One of the earliest artists who tried to convey dynamic movement in a static image is Hokusai Katsushika, who is one of the best known Ukiyo-e1 artists. He is called...

  15. Stand-off transmission lines and method for making same

    DOE Patents [OSTI]

    Tuckerman, D.B.

    1991-05-21T23:59:59.000Z

    Standoff transmission lines in an integrated circuit structure are formed by etching away or removing the portion of the dielectric layer separating the microstrip metal lines and the ground plane from the regions that are not under the lines. The microstrip lines can be fabricated by a subtractive process of etching a metal layer, an additive process of direct laser writing fine lines followed by plating up the lines or a subtractive/additive process in which a trench is etched over a nucleation layer and the wire is electrolytically deposited. Microstrip lines supported on freestanding posts of dielectric material surrounded by air gaps are produced. The average dielectric constant between the lines and ground plane is reduced, resulting in higher characteristic impedance, less crosstalk between lines, increased signal propagation velocities, and reduced wafer stress. 16 figures.

  16. Stand-off transmission lines and method for making same

    DOE Patents [OSTI]

    Tuckerman, David B. (Livermore, CA)

    1991-01-01T23:59:59.000Z

    Standoff transmission lines in an integrated circuit structure are formed by etching away or removing the portion of the dielectric layer separating the microstrip metal lines and the ground plane from the regions that are not under the lines. The microstrip lines can be fabricated by a subtractive process of etching a metal layer, an additive process of direct laser writing fine lines followed by plating up the lines or a subtractive/additive process in which a trench is etched over a nucleation layer and the wire is electrolytically deposited. Microstrip lines supported on freestanding posts of dielectric material surrounded by air gaps are produced. The average dielectric constant between the lines and ground plane is reduced, resulting in higher characteristic impedance, less crosstalk between lines, increased signal propagation velocities, and reduced wafer stress.

  17. Rubber linings -- Overview and new technology

    SciTech Connect (OSTI)

    Mehra, L. [ARDCO Corp., Denver, CO (United States); Polaski, E.L. [Lord Corp., Erie, PA (United States); Lewis, R.K. [Blair Rubber Co., Akron, OH (United States); Mauri, A. [A. Tamburini and Co., Via Tazzoli (Italy)

    1995-12-01T23:59:59.000Z

    The authors have covered at some length the basic steps involved in rubber lining. They have talked about the progress made in adhesives for lining. The new system in use now is far superior to previous systems. The new systems and the developments going on towards water-based adhesives are discussed. The authors briefly brought up the various types of rubber materials and new developments in terms of chlorobutyl-faced three-ply rubbers as well as development of EPDM-based compounds in Europe. The methods of vulcanization used have been discussed, including hot air vulcanizing which is prevalent in Europe. The development of self-vulcanizing rubber and the advantages in use of pre-cured rubber have been described. The development of new methods, techniques and products for rubber lining has been slow but sure. As can be expected, new product development costs are huge, requiring expert attention and participation. The possibilities are limitless and effort is forthcoming from various sources. There is a need for an interchange of ideas, and the involvement of NACE International and other professional bodies is acknowledged and appreciated.

  18. Vibration damping required for overhead lines

    SciTech Connect (OSTI)

    Richardson, A.S. Jr. [Research Consulting Associates, Lexington, MA (United States)] [Research Consulting Associates, Lexington, MA (United States)

    1995-04-01T23:59:59.000Z

    Transmission line engineers have sought an easy method for evaluating if external dampers are required on any new transmission line. In the past this question has been given to the damper manufacturer who has a vested interest in a affirmative answer. For single conductors (and for bundled conductors) the vibration level of a power line conductor is the result of a complicated aerodynamic process in which energy is taken into the motion from vortex action on the lee side of the conductor. The amount of energy taken in is a non-linear function of vibration amplitude, frequency, conductor diameter, and wind speed. The amount of energy taken out is a non-linear function of vibration amplitude, frequency, conductor mass, conductor tension, and a certain friction constant that varies from conductor to conductor. It is known that a small amount of vibration is allowed without endangering the conductor. This has been called the IEEE limit loop velocity, and is numerically equal to 200 mm/second. This paper explains a simple procedure, applicable to single conductors, which calculates a comparison of energy in vs. energy out. From this process it is shown how to select the initial tension in the conductor so that no external dampers are required.

  19. Transmission line environmental assessment guidance document

    SciTech Connect (OSTI)

    Jackson, J.; Pentecost, E.; Muzzarelli, J.

    1994-01-01T23:59:59.000Z

    Since 1939, U.S. utility companies have been required to obtain a Presidential Permit to construct electric transmission lines that cross a U.S. border and connect with a foreign utility. The purpose of this document is to provide Presidential Permit applicants with two types of guidance: (1) on the type of environmental and project descriptive information needed to assess the potential impacts of the proposed and alternative actions and (2) on compliance with applicable federal and state regulations. The main three chapters present information on the purpose and content of this document (Chapter 1); legislative, regulatory, and consultation requirements for transmission line interconnect projects (Chapter 2); and identification of basic transmission system design parameters and environmental data requirements for analysis of potential impacts of the proposed action (Chapter 3). Chapter 3 also includes information on possible techniques or measures to mitigate impacts. Appendix A presents an overview of NEPA requirements and DOE`s implementing procedures. Appendix B summarizes information on legislation that may be applicable to transmission line projects proposed in Presidential Permit applications.

  20. Radio-Frequency Interference (RFI) From Extra-High-Voltage (EHV) Transmission Lines

    E-Print Network [OSTI]

    Ellingson, Steven W.

    -current (HVAC) transmission lines; high-voltage direct-current (HVDC) transmission lines will be addressed

  1. Relativistic emission lines from accreting black holes - The effect of disk truncation on line profiles

    E-Print Network [OSTI]

    Mller, A; Mueller, Andreas; Camenzind, Max

    2004-01-01T23:59:59.000Z

    Relativistic emission lines generated by thin accretion disks around rotating black holes are an important diagnostic tool for testing gravity near the horizon. The iron K-line is of special importance for the interpretation of the X-ray emission of Seyfert galaxies, quasars and galactic X-ray binary systems. A generalized kinematic model is presented which includes radial drifts and non-Keplerian rotations for the line emitters. The resulting line profiles are obtained with an object-oriented ray tracer operating in the curved Kerr background metric. The general form of the Doppler factor is presented which includes all kinds of poloidal and toroidal motions near the horizon. The parameters of the model include the spin parameter, the inclination, the truncation and outer radius of the disk, velocity profiles for rotation and radial drift, the emissivity profile and a multi-species line-system. The red wing flux is generally reduced when radial drift is included as compared to the pure Keplerian velocity fie...

  2. Radio-Frequency Inverters With Transmission-Line Input Networks

    E-Print Network [OSTI]

    Phinney, Joshua W.

    A soft-switching inverter topology (the Class Phi ) is presented which draws dc source current through a transmission line or a lumped-network approximation of a distributed line. By aligning the inverter switching frequency ...

  3. CHARACTERIZING LOSSES IN MICROSTRIP TRANSMISSION LINES Rashmi Pathak

    E-Print Network [OSTI]

    Timbie, Peter

    CHARACTERIZING LOSSES IN MICROSTRIP TRANSMISSION LINES by Rashmi Pathak A dissertation submitted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Transmission Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Engineering) at the UNIVERSITY OF WISCONSIN­MADISON Summer 2005 #12;i Characterizing Losses in Transmission

  4. Mode conversation losses in overmolded millimeter wave transmission lines

    E-Print Network [OSTI]

    Tax, David S. (David Samuel)

    2008-01-01T23:59:59.000Z

    Millimeter wave transmission lines are integral components for many important applications like nuclear fusion and NMR spectroscopy. In low loss corrugated transmission lines propagating the HE,1 mode with a high waveguide ...

  5. EIS-0421: Big Eddy-Knight Transmission Line

    Broader source: Energy.gov [DOE]

    BPA is proposing to build a new 500 kilovolt (kV) transmission line in Wasco County, Oregon and Klickitat County, Washington and a new substation in Klickitat County. The new BPA transmission line...

  6. Lovell-Yellowtail transmission line rebuild project, Western...

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

    on Flickr. Western is rebuilding the Lovell-to-Yellowtail No. 1 and No. 2 115-kV transmission lines. The 94-circuit-miles of lines are located between Lovell, Wyo., and Yellowtail...

  7. PI Control of Gene Expression in Tumorous Cell Lines

    E-Print Network [OSTI]

    Mendonca, Rouella J.

    2010-01-16T23:59:59.000Z

    cancer cell line genes behave more like their Human Embryonic Kidney cell line counterparts. Two methods of intervention were introduced. The first method was the simpler on-off control intervention while the second method used a more advanced...

  8. Efficient buffer design algorithms for production line profit maximization

    E-Print Network [OSTI]

    Shi, Chuan, Ph. D. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    A production line is a manufacturing system where machines are connected in series and separated by buffers. The inclusion of buffers increases the average production rate of the line by limiting the propagation of ...

  9. Secretary Chu Thanks Utility Staff and Line Workers For Their...

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

    Thanks Utility Staff and Line Workers For Their Efforts to Restore Power in the Wake of Hurricane Sandy Secretary Chu Thanks Utility Staff and Line Workers For Their Efforts to...

  10. To: Mansueti, Lawrence Subject: RE: Pepco Scheduled Line Repair...

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

    Sent: Monday, January 29, 2007 6:28 PM To: Mansueti, Lawrence Subject: RE: Pepco Scheduled Line Repair Dec. 1-20, 2006 Larry, Regarding the planned line outage,...

  11. Emailed Comments of Elizabeth Chimento RE: Pepco Scheduled Line...

    Office of Environmental Management (EM)

    Emailed Comments of Elizabeth Chimento RE: Pepco Scheduled Line Repair Dec. 1-20, 2006 Emailed Comments of Elizabeth Chimento RE: Pepco Scheduled Line Repair Dec. 1-20, 2006 Docket...

  12. LINE Commission Visits Idaho National Laboratory

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

    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 for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9 5 - -/e),,s - 1 2 3 4 5 6 7 84, LINE Commission

  13. On Line Journals - Links - Cyclotron Institute

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

    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 for4,645U.S. DOE Office of Science (SC)IntegratedSpeeding access toTest and Evaluation | NationalNovemberOn-Line Journals

  14. CXD 4601, Line Yard Fence Project (4601)

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

    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 for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C o . C l a r8.0 -CURRICULUM VITAEAllen RadioLine

  15. SunLine Tests HHICE Bus in Desert Climate

    SciTech Connect (OSTI)

    Not Available

    2006-10-01T23:59:59.000Z

    Fact sheet describes the demonstration of a hybrid hydrogen internal combustion engine (HHICE) bus at SunLine Transit Agency.

  16. Reference: RGL 83-09 Subject: POWER TRANSMISSION LINES

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Reference: RGL 83-09 Subject: POWER TRANSMISSION LINES Title: MARKING OF AERIAL POWER TRANSMISSION. 1. The marking of aerial power transmission lines, cables, and structures over the navigable waters LINES, CABLES, & STRUCTURES Issued: 07/13/83 Expires: 12/31/85 Originator: DAEN-CWO-N Description: ARMY

  17. Using Transmission Lines for Global On-Chip Communication

    E-Print Network [OSTI]

    Huang, Michael C.

    1 Using Transmission Lines for Global On-Chip Communication Aaron Carpenter, Jianyun Hu, Jie Xu-switched network-on-chip a less attractive option. An alternative solution uses well-engineered transmission lines as communication links. These transmission lines, along with simple, practical circuits using modern CMOS technol

  18. Asymmetric parametric amplification in nonlinear left-handed transmission lines

    E-Print Network [OSTI]

    Asymmetric parametric amplification in nonlinear left-handed transmission lines David A. Powell amplification in nonlinear left-handed transmission lines, which serve as model systems for nonlinear negative-handed regime. © 2009 American Institute of Physics. DOI: 10.1063/1.3089842 Left-handed transmission lines

  19. Multifrequency Wilkinson Power Divider Using Microstrip Nonuniform Transmission Lines

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Multifrequency Wilkinson Power Divider Using Microstrip Nonuniform Transmission Lines Mohammad desired frequencies. The proposed structure contains two Microstrip Nonuniform Transmission Lines (MNTLs­6] and using composite right/left-handed transmission line (CRLH) [7]. The main disadvantage of multistage

  20. New approach for modelling distributed MEMS transmission lines

    E-Print Network [OSTI]

    Akin, Tayfun

    New approach for modelling distributed MEMS transmission lines K. Topalli, M. Unlu, S. Demir, O for the distributed MEMS transmission line (DMTL) structures. In this new model, the MEMS bridges that are used as the loading elements of the DMTL structures are represented as low-impedance transmission lines, rather than

  1. Evaluation of short-day onion doubled haploid lines

    E-Print Network [OSTI]

    Walker, Ryan Lee

    2009-05-15T23:59:59.000Z

    for pyruvic acid content ................................ 41 20 List of crosses made between two doubled haploid lines (H), two conventional lines (I), and one male sterile line (I11A)................................ 53 21 Means and LSD 0...), specific combining ability (SCA), reciprocal (REC), and nonmaternal (NMAT) effects for pyruvic acid content in onion .................. 71 37 Heterosis estimates of crosses grown at Uvalde, TX .................................... 72...

  2. Final Report 527 Economic Impact Analysis of Short Line Railroads

    E-Print Network [OSTI]

    Stephens, Jacqueline

    railroads. First described is the scope and presence of the eleven short line railroads currently operatingFinal Report 527 Economic Impact Analysis of Short Line Railroads by Jared J. Llorens, Ph.D. James's Catalog No. 4. Title and Subtitle Economic Impact Analysis of Short Line Railroads 5. Report Date October

  3. TOPCAT Plotting from STILTS API and Command Line

    E-Print Network [OSTI]

    Taylor, Mark

    TOPCAT Plotting from STILTS API and Command Line Mark Taylor, University of Bristol, UK your own Java application code, or from the STILTS command-line interface. Plot Model Each plot The STILTS package provides access to TOPCAT functions from the command line or a Jython front end. New

  4. Next Generation On-Line Dynamic Security Assessment

    E-Print Network [OSTI]

    Next Generation On-Line Dynamic Security Assessment Parts III and IV Final Project Report Power;Next Generation On-Line Dynamic Security Assessment Parts III and IV Final Project Report Parts III Research Center (PSERC) research project titled "Next Generation On-Line Dynamic Security Assessment

  5. Evidence for Line Broadening by Electron Scattering in the Broad Line Region of NGC 4395

    E-Print Network [OSTI]

    Ari Laor

    2006-01-30T23:59:59.000Z

    A high quality Keck spectrum of the Halpha line in NGC 4395 reveals symmetric exponential wings, fv\\propto e^{-v/sigma}, with sigma~500km/s. The wings extend out to >2500km/s from the line core, and down to a flux density of <10^-3 of the peak flux density. Numerical and analytic calculations indicate that exponential wings are expected for optically thin, isotropic, thermal electron scattering. Such scattering produces exponential wings with sigma=1.1sigma_e(ln tau_e^-1)^0.45, where sigma_e is the electron velocity dispersion, and tau_e is the electron scattering optical depth. The Halpha wings in NGC 4395 are well fit by an electron scattering model with tau_e=0.34, and an electron temperature T_e=1.1x10^4K. Such conditions are produced in photoionized gas with an ionization parameter U=0.3, as expected in the broad line region (BLR). Similar analysis of the [O III] 5007 line yields tau_e<0.01, consistent with the lower ionization in the narrow line region. If the electron scattering interpretation is correct, there should be a tight correlation between tau_e and the ionizing flux on time scales shorter than the BLR dynamical time, or ~1 week for NGC 4395. In contrast, the value of sigma should remain nearly constant on these time scales. Such wings may be discernible in other objects with unusually narrow Balmer lines, and they can provide a useful direct probe of T_e and tau_e in the BLR.

  6. CMAD IV 11/14/96 Information Security

    E-Print Network [OSTI]

    California at Davis, University of

    utilities, power pools, vendors etc.. #12;CMAD IV 11/14/96 #12; #12; GridCo LineCo PoolCo Energy Merchant INFO INFO INFO $ $ $ PWR PWR PWR #12;CMAD IV 11/14/96 "Future" Is At Hand · Federal Energy Regulatory protection and audit practices inadequate. · Internal priorities limiting attention to security concerns

  7. Control of stochasticity in magnetic field lines

    E-Print Network [OSTI]

    Cristel Chandre; Michel Vittot; Guido Ciraolo; Philippe Ghendrih; Ricardo Lima

    2005-11-03T23:59:59.000Z

    We present a method of control which is able to create barriers to magnetic field line diffusion by a small modification of the magnetic perturbation. This method of control is based on a localized control of chaos in Hamiltonian systems. The aim is to modify the perturbation locally by a small control term which creates invariant tori acting as barriers to diffusion for Hamiltonian systems with two degrees of freedom. The location of the invariant torus is enforced in the vicinity of the chosen target. Given the importance of confinement in magnetic fusion devices, the method is applied to two examples with a loss of magnetic confinement. In the case of locked tearing modes, an invariant torus can be restored that aims at showing the current quench and therefore the generation of runaway electrons. In the second case, the method is applied to the control of stochastic boundaries allowing one to define a transport barrier within the stochastic boundary and therefore to monitor the volume of closed field lines.

  8. Lorentz transformations with arbitrary line of motion

    E-Print Network [OSTI]

    Chandru Iyer; G. M. Prabhu

    2008-09-18T23:59:59.000Z

    Sometimes it becomes a matter of natural choice for an observer (A) that he prefers a coordinate system of two-dimensional spatial x-y coordinates from which he observes another observer (B) who is moving at a uniform speed along a line of motion, which is not collinear with As chosen x or y axis. It becomes necessary in such cases to develop Lorentz transformations where the line of motion is not aligned with either the x or the y-axis. In this paper we develop these transformations and show that under such transformations, two orthogonal systems (in their respective frames) appear non-orthogonal to each other. We also illustrate the usefulness of the transformation by applying it to three problems including the rod-slot problem. The derivation has been done before using vector algebra. Such derivations assume that the axes of K and K-prime are parallel. Our method uses matrix algebra and shows that the axes of K and K-prime do not remain parallel, and in fact K and K-prime which are properly orthogonal are observed to be non-orthogonal by K-prime and K respectively. http://www.iop.org/EJ/abstract/0143-0807/28/2/004

  9. Linee guida per l'utilizzo del logoLinee guida per l'utilizzo del logoLinee guida per l'utilizzo del logoLinee guida per l'utilizzo del logo d'Ateneod'Ateneod'Ateneod'Ateneo Universit degli Studi di Catania Linee guida per l'utilizzo del logo d'Ateneo

    E-Print Network [OSTI]

    Bella, Giampaolo

    Linee guida per l'utilizzo del logoLinee guida per l'utilizzo del logoLinee guida per l'utilizzo del logoLinee guida per l'utilizzo del logo d'Ateneod'Ateneod'Ateneod'Ateneo #12;Universit degli Studi di Catania Linee guida per l'utilizzo del logo d'Ateneo Pag. 1 Premessa Negli ultimi anni

  10. The broadening of Lyman-alpha forest absorption lines

    E-Print Network [OSTI]

    Garzilli, Antonella; Schaye, Joop

    2015-01-01T23:59:59.000Z

    We provide an analytical description of the line broadening of HI absorbers in the Lyman-alpha forest resulting from Doppler broadening and Jeans smoothing. We demonstrate that our relation captures the dependence of the line-width on column density for narrow lines in z~3 mock spectra remarkably well. Broad lines at a given column density arise when the underlying density structure is more complex, and such clustering is not captured by our model. Our understanding of the line broadening opens the way to a new method to characterise the thermal state of the intergalactic medium and to determine the sizes of the absorbing structures.

  11. Recombination rates, Resonance Strengths and Line Profiles of Dielectronic Satellite Lines

    E-Print Network [OSTI]

    Nahar, Sultana Nurun

    , The Ohio State University, Columbus, OH 43210, USA nahar@astronomy.ohio-state.edu, pradhan@astronomy.ohio, labeled `a' through `v', via transitions of the type 1s2l2l 1s2 2l. These lines are seen at energies of the highly charged ions Ca XVIII, Fe XXIV, and Ni XXVI. In contrast to obtaining a single energy point

  12. Method for bonding a transmission line to a downhole tool

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Spanish Fork, UT)

    2007-11-06T23:59:59.000Z

    An apparatus for bonding a transmission line to the central bore of a downhole tool includes a pre-formed interface for bonding a transmission line to the inside diameter of a downhole tool. The pre-formed interface includes a first surface that substantially conforms to the outside contour of a transmission line and a second surface that substantially conforms to the inside diameter of a downhole tool. In another aspect of the invention, a method for bonding a transmission line to the inside diameter of a downhole tool includes positioning a transmission line near the inside wall of a downhole tool and placing a mold near the transmission line and the inside wall. The method further includes injecting a bonding material into the mold and curing the bonding material such that the bonding material bonds the transmission line to the inside wall.

  13. The Infrared Ca II lines in Sunspot Umbrae

    E-Print Network [OSTI]

    Kollatschny, W; Wiehr, E; Fallipou, M A

    2012-01-01T23:59:59.000Z

    We present an empirical working model for sunspot umbrae which equally describes observed continuum intensities and line profiles. The wings of the infrared Ca II lines depend sensitively on the temperature gradient at -0.6 umbra and are thus insensitive to parasitic light. It is also shown that the infrared K I 7699 line is suitable for umbral spectroscopy since it is not seriously blended, its continuum is well defined and it is less influenced by parasitic light as compared to lines in the visible spectrum, due to the smaller umbal contrast. Calculations show that the umbral gradient dT/d(tau), required to fit the Ca II triplet lines, strongly conflicts with the observed profiles of K I 7699, NaD2 and Fe I 5434 (g=0), even when assuming vanishing Fe II lines for a maximum correction of parasitic light. It is shown that the discrepancy from the different line pr...

  14. Ground-based transmission line conductor motion sensor

    SciTech Connect (OSTI)

    Jacobs, M.L.; Milano, U.

    1988-08-22T23:59:59.000Z

    A ground-based-conductor motion-sensing apparatus is provided for remotely sensing movement of electric-power transmission lines, particularly as would occur during the wind-induced condition known as galloping. The apparatus is comprised of a motion sensor and signal-generating means which are placed underneath a transmission line and will sense changes in the electric field around the line due to excessive line motion. The detector then signals a remote station when a conditioning of galloping is sensed. The apparatus of the present invention is advantageous over the line-mounted sensors of the prior art in that it is easier and less hazardous to install. The system can also be modified so that a signal will only be given when particular conditions, such as specific temperature range, large-amplitude line motion, or excessive duration of the line motion, are occurring.

  15. XMM-Newton Observations of AGN Iron Line Profiles

    E-Print Network [OSTI]

    James Reeves

    2002-11-18T23:59:59.000Z

    XMM-Newton observations of type I AGN are presented. The properties of the iron K emission line are reviewed, the majority of AGN observed by XMM-Newton show narrow, unresolved (by XMM) iron lines at 6.4 keV from cold matter that must originate far from the inner accretion disc, perhaps in the putative torus or outer broad line region. The strength of this narrow line appears to decrease with luminosity, implying a reduction in the covering fraction of this material in the more luminous quasars. Few examples of the broad, relativistic iron line profile have been found by XMM-Newton, although in MCG -6-30-15, the extreme breadth of the broad line component may imply a Kerr metric for the central black hole. Generally, relativistic Fe K line profiles are not required in a number of other Seyfert 1 X-ray spectra.

  16. Dispersion-free radial transmission lines

    DOE Patents [OSTI]

    Caporaso, George J. (Livermore, CA); Nelson, Scott D. (Patterson, CA)

    2011-04-12T23:59:59.000Z

    A dispersion-free radial transmission line ("DFRTL") preferably for linear accelerators, having two plane conductors each with a central hole, and an electromagnetically permeable material ("EPM") between the two conductors and surrounding a channel connecting the two holes. At least one of the material parameters of relative magnetic permeability, relative dielectric permittivity, and axial width of the EPM is varied as a function of radius, so that the characteristic impedance of the DFRTL is held substantially constant, and pulse transmission therethrough is substantially dispersion-free. Preferably, the EPM is divided into concentric radial sections, with the varied material parameters held constant in each respective section but stepwise varied between sections as a step function of the radius. The radial widths of the concentric sections are selected so that pulse traversal time across each section is the same, and the varied material parameters of the concentric sections are selected to minimize traversal error.

  17. Atomic line emission analyzer for hydrogen isotopes

    DOE Patents [OSTI]

    Kronberg, J.W.

    1991-05-08T23:59:59.000Z

    Apparatus for isotopic analysis of hydrogen comprises a low pressure chamber into which a sample of hydrogen is introduced and then exposed to an electrical discharge to excite the electrons of the hydrogen atoms to higher energy states and thereby cause the emission of light on the return to lower energy states, a Fresnel prism made at least in part of a material anomalously dispersive to the wavelengths of interest for dispersing the emitted light, and a photodiode array for receiving the dispersed light. The light emitted by the sample is filtered to pass only the desired wavelengths, such as one of the lines of the Balmer series for hydrogen, the wavelengths of which differ slightly from one isotope to another. The output of the photodiode array is processed to determine the relative amounts of each isotope present in the sample. Additionally, the sample itself may be recovered using, a metal hydride.

  18. Nonlinear transmission line based electron beam driver

    SciTech Connect (OSTI)

    French, David M.; Hoff, Brad W.; Tang Wilkin; Heidger, Susan; Shiffler, Don [Directed Energy Directorate, Air Force Research Laboratory, Kirtland AFB, New Mexico 87117 (United States); Allen-Flowers, Jordan [Program in Applied Mathematics, University of Arizona, Tucson, Arizona 85721 (United States)

    2012-12-15T23:59:59.000Z

    Gated field emission cathodes can provide short electron pulses without the requirement of laser systems or cathode heating required by photoemission or thermionic cathodes. The large electric field requirement for field emission to take place can be achieved by using a high aspect ratio cathode with a large field enhancement factor which reduces the voltage requirement for emission. In this paper, a cathode gate driver based on the output pulse train from a nonlinear transmission line is experimentally demonstrated. The application of the pulse train to a tufted carbon fiber field emission cathode generates short electron pulses. The pulses are approximately 2 ns in duration with emission currents of several mA, and the train contains up to 6 pulses at a frequency of 100 MHz. Particle-in-cell simulation is used to predict the characteristic of the current pulse train generated from a single carbon fiber field emission cathode using the same technique.

  19. Second Line of Defense Spares Program Assessment

    SciTech Connect (OSTI)

    Henderson, Dale L.; Muller, George; Mercier, Theresa M.; Brigantic, Robert T.; Perkins, Casey J.; Cooley, Scott K.

    2012-11-20T23:59:59.000Z

    The Office of the Second Line of Defense (SLD) is part of the Department of Energys (DOE) National Nuclear Security Administration (NNSA). The SLD Program accomplishes its critical global security mission by forming cooperative relationships with partner countries to install passive radiation detection systems that augment traditional inspection and law enforcement measures by alerting border officials to the presence of special nuclear or other radiological materials in cross-border traffic. An important tenet of the program is to work collaboratively with these countries to establish the necessary processes, procedures, infrastructure and conditions that will enable them to fully assume the financial and technical responsibilities for operating the equipment. As the number of operational deployments grows, the SLD Program faces an increasingly complex logistics process to promote the timely and efficient supply of spare parts.

  20. Flavor instabilities in the neutrino line model

    E-Print Network [OSTI]

    Huaiyu Duan; Shashank Shalgar

    2015-05-28T23:59:59.000Z

    A dense neutrino medium can experience collective flavor oscillations through nonlinear neutrino-neutrino refraction. To make this multi-dimensional flavor transport problem more tractable, all existing studies have assumed certain symmetries (e.g., the spatial homogeneity and directional isotropy in the early universe) to reduce the dimensionality of the problem. In this work we show that, if both the directional and spatial symmetries are not enforced in the neutrino line model, collective oscillations can develop in the physical regimes where the symmetry-preserving oscillation modes are stable. Our results suggest that collective neutrino oscillations in real astrophysical environments (such as core-collapse supernovae and black-hole accretion discs) can be qualitatively different from the predictions based on existing models in which spatial and directional symmetries are artificially imposed.

  1. Calibrating transport lines using LOCO techniques

    SciTech Connect (OSTI)

    Yves Roblin

    2011-09-01T23:59:59.000Z

    With the 12GeV upgrade underway at CEBAF, there is a need to re-characterize the beamlines after the modifications made to it to accommodate running at higher energies. We present a linear perturbation approach to calibrating the optics model of transport lines. This method is adapted from the LOCO method in use for storage rings. We consider the effect of quadrupole errors, dipole construction errors as well as beam position monitors and correctors calibrations. The ideal model is expanded to first order in Taylor series of the quadrupole errors. A set of difference orbits obtained by exciting the correctors along the beamline is taken, yielding the measured response matrix. An iterative procedure is invoked and the quadrupole errors as well as beam position monitors and corrector calibration factors are obtained. Here we present details of the method and results of first measurements at CEBAF in early 2011.

  2. Atomic line emission analyzer for hydrogen isotopes

    DOE Patents [OSTI]

    Kronberg, James W. (108 Independent Blvd., Aiken, SC 29801)

    1993-01-01T23:59:59.000Z

    Apparatus for isotopic analysis of hydrogen comprises a low pressure chamber into which a sample of hydrogen is introduced and then exposed to an electrical discharge to excite the electrons of the hydrogen atoms to higher energy states and thereby cause the emission of light on the return to lower energy states, a Fresnel prism made at least in part of a material anomalously dispersive to the wavelengths of interest for dispersing the emitted light, and a photodiode array for receiving the dispersed light. The light emitted by the sample is filtered to pass only the desired wavelengths, such as one of the lines of the Balmer series for hydrogen, the wavelengths of which differ slightly from one isotope to another. The output of the photodiode array is processed to determine the relative amounts of each isotope present in the sample. Additionally, the sample itself may be recovered using a metal hydride.

  3. On-line tritium production monitor

    DOE Patents [OSTI]

    Mihalczo, J.T.

    1993-11-23T23:59:59.000Z

    A scintillation optical fiber system for the on-line monitoring of nuclear reactions in an event-by-event manner is described. In the measurement of tritium production one or more optical fibers are coated with enriched {sup 6}Li and connected to standard scintillation counter circuitry. A neutron generated {sup 6}Li(n)T reaction occurs in the coated surface of {sup 6}Li-coated fiber to produce energetic alpha and triton particles one of which enters the optical fiber and scintillates light through the fiber to the counting circuit. The coated optical fibers can be provided with position sensitivity by placing a mirror at the free end of the fibers or by using pulse counting circuits at both ends of the fibers. 5 figures.

  4. On-line tritium production monitor

    DOE Patents [OSTI]

    Mihalczo, John T. (Oak Ridge, TN)

    1993-01-01T23:59:59.000Z

    A scintillation optical fiber system for the on-line monitoring of nuclear reactions in an event-by-event manner is described. In the measurement of tritium production one or more optical fibers are coated with enriched .sup.6 Li and connected to standard scintillation counter circuitry. A neutron generated .sup.6 Li(n )T reaction occurs in the coated surface of .sup.6 Li-coated fiber to produce energetic alpha and triton particles one of which enters the optical fiber and scintillates light through the fiber to the counting circuit. The coated optical fibers can be provided with position sensitivity by placing a mirror at the free end of the fibers or by using pulse counting circuits at both ends of the fibers.

  5. Insulation spacer eliminates electric shorts between lines

    SciTech Connect (OSTI)

    Colaizzi, J.F.; Rockafellow, G.B.

    1983-03-01T23:59:59.000Z

    The design criteria incorporated into the pipeline insulating spacer were: spacer material selected must have a very large compressive and tensile strength in order to withstand the weight and stress resulting on the pipelines; provide the necessary abrasive resistance, dielectric strength, and will not decay underground; must not soften with heat when used around or near stream lines or will not cold flow under pressure; minimum length and circumference to reduce ''Shielding Effects'' from any cathodic protection system; and provide a material that incorporates a maximum strength at a minimum thickness. Explains that electric shorts are caused by 2 or more metallic structures in contact with each other. Notes that the insulating spacer's use has been expanded to provide electrical and physical insulation between carrier pipe and casing, supports for piping in compressing stations, and for pipelines that are suspended on bridges.

  6. Modelling receding contact lines on superhydrophobic surfaces

    E-Print Network [OSTI]

    B. M. Mognetti; J. M. Yeomans

    2010-10-23T23:59:59.000Z

    We use mesoscale simulations to study the depinning of a receding contact line on a superhydrophobic surface patterned by a regular array of posts. In order that the simulations are feasible, we introduce a novel geometry where a column of liquid dewets a capillary bounded by a superhydrophobic plane which faces a smooth hydrophilic wall of variable contact angle. We present results for the dependence of the depinning angle on the shape and spacing of the posts, and discuss the form of the meniscus at depinning. We find, in agreement with [17], that the local post concentration is a primary factor in controlling the depinning angle, and show that the numerical results agree well with recent experiments. We also present two examples of metastable pinned configurations where the posts are partially wet.

  7. Atomic line emission analyzer for hydrogen isotopes

    DOE Patents [OSTI]

    Kronberg, J.W.

    1993-03-30T23:59:59.000Z

    Apparatus for isotopic analysis of hydrogen comprises a low pressure chamber into which a sample of hydrogen is introduced and then exposed to an electrical discharge to excite the electrons of the hydrogen atoms to higher energy states and thereby cause the emission of light on the return to lower energy states, a Fresnel prism made at least in part of a material anomalously dispersive to the wavelengths of interest for dispersing the emitted light, and a photodiode array for receiving the dispersed light. The light emitted by the sample is filtered to pass only the desired wavelengths, such as one of the lines of the Balmer series for hydrogen, the wavelengths of which differ slightly from one isotope to another. The output of the photodiode array is processed to determine the relative amounts of each isotope present in the sample. Additionally, the sample itself may be recovered using a metal hydride.

  8. On-line chemical composition analyzer development

    SciTech Connect (OSTI)

    Roberts, M.J.; Garrison, A.A.; Muly, E.C.; Moore, C.F.

    1992-02-01T23:59:59.000Z

    The energy consumed in distillation processes in the United States represents nearly three percent of the total national energy consumption. If effective control of distillation columns can be accomplished, it has been estimated that it would result in a reduction in the national energy consumption of 0.3%. Real-time control based on mixture composition could achieve these savings. However, the major distillation processes represent diverse applications and at present there does not exist a proven on-line chemical composition sensor technology which can be used to control these diverse processes in real-time. This report presents a summary of the findings of the second phase of a three phase effort undertaken to develop an on-line real-time measurement and control system utilizing Raman spectroscopy. A prototype instrument system has been constructed utilizing a Perkin Elmer 1700 Spectrometer, a diode pumped YAG laser, two three axis positioning systems, a process sample cell land a personal computer. This system has been successfully tested using industrially supplied process samples to establish its performance. Also, continued application development was undertaken during this Phase of the program using both the spontaneous Raman and Surface-enhanced Raman modes of operation. The study was performed for the US Department of Energy, Office of Industrial Technologies, whose mission is to conduct cost-shared R D for new high-risk, high-payoff industrial energy conservation technologies. Although this document contains references to individual manufacturers and their products, the opinions expressed on the products reported do not necessarily reflect the position of the Department of Energy.

  9. Energy measurement utilizing on-line chromatograph

    SciTech Connect (OSTI)

    Kizer, P.E. [Applied Automation, Inc./Hartmann and Braun, Houston, TX (United States)

    1995-12-01T23:59:59.000Z

    Most gas contracts today have at least a BTU specification and many use MMBTU (million BTU) rather than gas volume for custody transfer measurement. Gas chromatography is today being chosen more and more because the calculations of the gas volumes in modem electronic flow meters requires not only BTU{sub 5} information, but specific gravity, Mol % CO{sub 2} and Mol % N{sub 2}. The new AGA-8 supercompressibility equations also require a complete hydrocarbon analysis. What then, is a BTU? BTU is the acronym for British Thermal Unit. One BTU is the quantity of heat required to raise the temperature of one pound of water from 58.5{degrees}F to 59.5{degrees}F (about 1055.056 joules (SI))3. The higher the BTU content, the more energy can be obtained from burning the gas. It just doesn`t take as many cubic feet of gas to heat the home hot water tank if the gas is 1090 BTU instead of 940 BTU per SCF. The BTU, then, is a prime indicator of natural gas quality. An MMBTU{sup 2} is calculated by: BTU/CF * MMCF = MMBTU What is it worth to keep track of the natural gas BTU? If we postulate 1000 BTU/CF as fairly average for natural gas, and {+-} 5% error between doing a lab determination of the heating value on a spot sample of the gas and an on- line (nearly continuous) monitor of the heating value, this results in a {+-} 50 BTU difference. On a station that has 50 MMCF per day at $2.50 per MCF or MMBTU, this is $125,000.00 worth of gas per day. Five percent of this is $6,250.00 per day. If a process chromatograph, $50,000 installed cost, is used to determine the energy content a pay out of less than 10 days is obtained on a 50 MMCF/day station. Most major interconnects have on- line BTU measurement of some sort today.

  10. Sensor, method and system of monitoring transmission lines

    DOE Patents [OSTI]

    Syracuse, Steven J.; Clark, Roy; Halverson, Peter G.; Tesche, Frederick M.; Barlow, Charles V.

    2012-10-02T23:59:59.000Z

    An apparatus, method, and system for measuring the magnetic field produced by phase conductors in multi-phase power lines. The magnetic field measurements are used to determine the current load on the conductors. The magnetic fields are sensed by coils placed sufficiently proximate the lines to measure the voltage induced in the coils by the field without touching the lines. The x and y components of the magnetic fields are used to calculate the conductor sag, and then the sag data, along with the field strength data, can be used to calculate the current load on the line and the phase of the current. The sag calculations of this invention are independent of line voltage and line current measurements. The system applies a computerized fitter routine to measured and sampled voltages on the coils to accurately determine the values of parameters associated with the overhead phase conductors.

  11. Hyperreal Waves on Transfinte, Terminated, Distortionless and Lossless, Transmission Lines

    E-Print Network [OSTI]

    A. H. Zemanian

    2004-06-10T23:59:59.000Z

    A prior work (see Chapter 8 of the book, ``Graphs and Networks: Transfinite and Nonstandard,'' Birkhauser-Boston, Cambridge, Mass., USA, 2004) examined the propagation of an electromagnetic wave on a transfinite transmission line, transfinite in the sense that infinitely many one-way infinite transmission lines are connected in cascade. That there are infinitely many such one-way infinite lines results in the wave propagating without ever reflecting at some discontinuity. The present work examines the cascade where the cascade terminates after only finitely many one-way infinite transmission lines, with the result that reflected waves are now produced at both the far end as well as at the initial end of the transfinite transmission line. The question of whether the reflected waves are infini tesimal or appreciable and whether they sum to an infinitesimal or appreciable amount are resolved for both distortionless and lossless lines. Finally, the generalizations to higher ranks of transfiniteness is briefly summarized.

  12. Radio frequency communication system utilizing radiating transmission lines

    DOE Patents [OSTI]

    Struven, Warren C. (San Carlos, CA)

    1984-01-01T23:59:59.000Z

    A radio communication system for use in tunnels, mines, buildings or other shielded locations in which a pair of radiating transmission lines (30), (31) extend through such location in spaced coextensive relation to each other. Each transmission line (30), (31) has at least one unidirectional amplifier (32), (33) interposed therein with the sense of the unidirectional amplifier (32) of one transmission line (30) being opposite to the sense of the unidirectional amplifier (33) of the other transmission line (31). Each of the amplifiers (32), (33) has a gain which is less than the coupling loss between the transmission lines (30), (31). Two or more mobile transceivers (35) in the location served by the system are coupled to the transmission lines (30), (31) by electromagnetic wave propagation in space in order to communicate directly with each other at a given radio frequency within the frequency range of the system.

  13. Introduction to LINE: a Feynman diagram graphic generator

    SciTech Connect (OSTI)

    LeClaire, B.

    1985-03-01T23:59:59.000Z

    This is an exec for making Feynman graphs of amazing complexity with amazing simplicity - once you know how. And knowing how is hopefully quite easy to learn. The LINE exec works iteratively, repeatedly prompting you for the elements of the graph. You tell the exec what kinds of lines (or loops) to draw, and where to put them. Each line is plotted in a 10 x 10 Cartesian coordinate system using two ordered pairs of coordinates, (x/sub 1/,y/sub 1/) and (x/sub 2/,y/sub 2/), as endpoints. The types of lines that can be drawn include fermions, scalars, photons, gluons, W or Z bosons. As each line is added the exec alows you to display the updated picture, and to erase the last line added (if necessary). In this way you can keep going, drawing and erasing, until you have exactly what you want.

  14. DOE-EPRI On-Line Monitoring Implementation Guidelines

    SciTech Connect (OSTI)

    E. Davis; R. Bickford

    2003-01-02T23:59:59.000Z

    OAK B139 Industry and EPRI experience at several plants has shown on-line monitoring to be very effective in identifying out-of-calibration instrument channels or indications of equipment-degradation problems. The EPRI implementation project for on-line monitoring has demonstrated the feasibility of on-line monitoring at several participating nuclear plants. The results have been very encouraging, and substantial progress is anticipated in the coming years.

  15. DOE-EPRI On-Line Monitoring Implementation Guidelines

    SciTech Connect (OSTI)

    E. Davis, R. Bickford

    2003-01-02T23:59:59.000Z

    Industry and EPRI experience at several plants has shown on-line monitoring to be very effective in identifying out-of-calibration instrument channels or indications of equipment-degradation problems. The EPRI implementation project for on-line monitoring has demonstrated the feasability of on-line monitoring at several participating nuclear plants. The results have been very enouraging, and substantial progress is anticipated in the coming years.

  16. Inertial confinement fusion method producing line source radiation fluence

    DOE Patents [OSTI]

    Rose, Ronald P. (Peters Township, Washington County, PA)

    1984-01-01T23:59:59.000Z

    An inertial confinement fusion method in which target pellets are imploded in sequence by laser light beams or other energy beams at an implosion site which is variable between pellet implosions along a line. The effect of the variability in position of the implosion site along a line is to distribute the radiation fluence in surrounding reactor components as a line source of radiation would do, thereby permitting the utilization of cylindrical geometry in the design of the reactor and internal components.

  17. Monolithic torpedo bottle lining at Weirton Steel Corporation

    SciTech Connect (OSTI)

    Baker, R.; Griffith, E. [Weirton Steel Corp., WV (United States)

    1996-12-31T23:59:59.000Z

    In late 1992 and early 1993 Weirton Steel burned through three torpedo bottles in a three-month period. To determine the cause of the burn throughs, a thorough review of bottle maintenance practices was initiated. Upon identification of contributing factors, changes in operating practices were made. In an effort to increase bottle reliability, lining trials were initiated. Among the trials, a monolithic lining was installed and this paper will discuss results of the lining to date.

  18. TRANSPORT OF WASTE SIMULANTS IN PJM VENT LINES

    SciTech Connect (OSTI)

    Qureshi, Z

    2007-02-21T23:59:59.000Z

    The experimental work was conducted to determine whether there is a potential for waste simulant to transport or 'creep' up the air link line and contaminate the pulse jet vent system, and possibly cause long term restriction of the air link line. Additionally, if simulant creep occurred, establish operating parameters for washing down the line. The amount of the addition of flush fluids and mixer downtime must be quantified.

  19. Slow sound in lined flow ducts

    E-Print Network [OSTI]

    Auregan, Yves

    2015-01-01T23:59:59.000Z

    We consider the acoustic propagation in lined flow duct with a purely reactive impedance at the wall. This reacting liner has the capability to reduce the speed of sound, and thus to enhance the interaction between the acoustic propagation and the low Mach number flow ($M\\simeq0.3$). At the lower frequencies, there are typically 4 acoustic or hydrodynamic propagating modes, with 3 of them propagating in the direction of the flow. Above a critical frequency, there are only 2 propagating modes that all propagate in the direction of the flow. From the exact 2D formulation an approximate 1D model is developed to study the scattering of acoustic waves in a straight duct with varying wall impedance. This simple system, with a uniform flow and with a non-uniform liner impedance at the wall, permits to study the scattering between regions with different waves characteristics. Several situations are characterized to show the importance of negative energy waves, strong interactions between acoustic and hydrodynamic mod...

  20. Contingency Analysis of Cascading Line Outage Events

    SciTech Connect (OSTI)

    Thomas L Baldwin; Magdy S Tawfik; Miles McQueen

    2011-03-01T23:59:59.000Z

    As the US power systems continue to increase in size and complexity, including the growth of smart grids, larger blackouts due to cascading outages become more likely. Grid congestion is often associated with a cascading collapse leading to a major blackout. Such a collapse is characterized by a self-sustaining sequence of line outages followed by a topology breakup of the network. This paper addresses the implementation and testing of a process for N-k contingency analysis and sequential cascading outage simulation in order to identify potential cascading modes. A modeling approach described in this paper offers a unique capability to identify initiating events that may lead to cascading outages. It predicts the development of cascading events by identifying and visualizing potential cascading tiers. The proposed approach was implemented using a 328-bus simplified SERC power system network. The results of the study indicate that initiating events and possible cascading chains may be identified, ranked and visualized. This approach may be used to improve the reliability of a transmission grid and reduce its vulnerability to cascading outages.

  1. Boron-Lined Neutron Detector Measurements

    SciTech Connect (OSTI)

    Lintereur, Azaree T.; Kouzes, Richard T.; Ely, James H.; Erikson, Luke E.; Siciliano, Edward R.; Woodring, Mitchell L.

    2010-03-07T23:59:59.000Z

    PNNL-18938 Revision Radiation portal monitors used for interdiction of illicit materials at borders include highly sensitive neutron detection systems. The main reason for having neutron detection capability is to detect fission neutrons from plutonium. The currently deployed radiation portal monitors (RPMs) from Ludlum and Science Applications International Corporation (SAIC) use neutron detectors based upon 3He-filled gas proportional counters, which are the most common large neutron detector. There is a declining supply of 3He in the world, and thus, methods to reduce the use of this gas in RPMs with minimal changes to the current system designs and sensitivity to cargo-borne neutrons are being investigated. Four technologies have been identified as being currently commercially available, potential alternative neutron detectors to replace the use of 3He in RPMs. Reported here are the results of tests of a newly designed boron-lined proportional counter option. This testing measured the neutron detection efficiency and gamma ray rejection capabilities of two successive prototypes of a system manufactured by GE Reuter Stokes.

  2. Boron-Lined Neutron Detector Measurements

    SciTech Connect (OSTI)

    Lintereur, Azaree T.; Kouzes, Richard T.; Ely, James H.; Erikson, Luke E.; Siciliano, Edward R.

    2009-11-02T23:59:59.000Z

    Radiation portal monitors used for interdiction of illicit materials at borders include highly sensitive neutron detection systems. The main reason for having neutron detection capability is to detect fission neutrons from plutonium. The currently deployed radiation portal monitors (RPMs) from Ludlum and Science Applications International Corporation (SAIC) use neutron detectors based upon 3He-filled gas proportional counters, which are the most common large neutron detector. There is a declining supply of 3He in the world, and thus, methods to reduce the use of this gas in RPMs with minimal changes to the current system designs and sensitivity to cargo-borne neutrons are being investigated. Four technologies have been identified as being currently commercially available, potential alternative neutron detectors to replace the use of 3He in RPMs. Reported here are the results of tests of a newly designed boron-lined proportional counter option. This testing measured the neutron detection efficiency and gamma ray rejection capabilities of a system manufactured by Reuter Stokes.

  3. Second Line of Defense Spares Program

    SciTech Connect (OSTI)

    Henderson, Dale L.; Holmes, Aimee E.; Muller, George; Mercier, Theresa M.; Brigantic, Robert T.; Perkins, Casey J.; Cooley, Scott K.; Thorsen, Darlene E.

    2012-11-20T23:59:59.000Z

    During Fiscal Year 2012, a team from the Pacific Northwest National Laboratory (PNNL) conducted an assessment and analysis of the Second Line of Defense (SLD) Sustainability spare parts program. Spare parts management touches many aspects of the SLD Sustainability Program including contracting and integration of Local Maintenance Providers (LMP), equipment vendors, analyses and metrics on program performance, system state of health, and maintenance practices. Standardized spares management will provide better data for decisions during site transition phase and will facilitate transition to host country sustainability ownership. The effort was coordinated with related SLD Sustainability Program initiatives, including a configuration items baselining initiative, a metrics initiative, and a maintenance initiative. The spares study has also led to pilot programs for sourcing alternatives that include regional intermediate inventories and partnering agreements that leverage existing supply chains. Many partners from the SLD Sustainability program contributed to and were consulted in the course of the study. This document provides a description of the findings, recommendations, and implemented solutions that have resulted from the study.

  4. active power line: Topics by E-print Network

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

    Modeling, System Brest, Universit de 8 Reference: RGL 83-09 Subject: POWER TRANSMISSION LINES Engineering Websites Summary: Reference: RGL 83-09 Subject: POWER TRANSMISSION...

  5. EIS-0325: Schultz-Hanford Area Transmission Line Project, WA

    Broader source: Energy.gov [DOE]

    BPA proposes to construct a new 500-kilovolt (kV) transmission line in central Washington. This project would increase transmission system capacity north of Hanford.

  6. ac power lines: Topics by E-print Network

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

    A FUNDAMENTAL characteristic construction of both generation facilities and new transmission lines, so better utilization of existing power Lehn, Peter W. 5 A new high performance...

  7. 20120131 DOE Congestion Study Clean Line Comments 2012

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

    should encourage transmission developers to propose corridors to be 1 www.nrel.govwindresourceassessment.html 2 www.maps.platts.com Existing High Voltage Transmission Lines...

  8. A simple line wave generator using commercial explosives

    SciTech Connect (OSTI)

    Morris, John S [Los Alamos National Laboratory; Jackson, Scott I [Los Alamos National Laboratory; Hill, Larry G [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    We present a simple and inexpensive explosive line wave generator has been designed using commercial sheet explosive and plane wave lens concepts. The line wave generator is constructed using PETN and RDX based sheet explosive for the slow and fast components respectively. The design permits the creation of any desired line width. A series of experiments were performed on a 100 mm design, measuring the detonation arrival time at the output of the generator using a streak camera. An iterative technique was used to adjust the line wave generator's slow and fast components, so as to minimize the arrival time deviation. Designs, test results, and concepts for improvements will be discussed.

  9. A 1.3 cm Line Survey toward Orion KL

    E-Print Network [OSTI]

    Gong, Y; Thorwirth, S; Spezzano, S; Menten, K M; Walmsley, C M; Wyrowski, F; Mao, R Q; Klein, B

    2015-01-01T23:59:59.000Z

    Orion KL has served as a benchmark for spectral line searches throughout the (sub)millimeter regime. The main goal is to systematically study spectral characteristics of Orion KL in the 1.3 cm band. We carried out a spectral line survey (17.9 GHz to 26.2 GHz) with the Effelsberg-100 m telescope towards Orion KL. We find 261 spectral lines, yielding an average line density of about 32 spectral features per GHz above 3$\\sigma$. The identified lines include 164 radio recombination lines (RRLs) and 97 molecular lines. A total of 23 molecular transitions from species known to exist in Orion KL are detected for the first time in the interstellar medium. Non-metastable 15NH3 transitions are detected in Orion KL for the first time. Based on the velocity information of detected lines and the ALMA images, the spatial origins of molecular emission are constrained and discussed. A narrow feature is found in SO2 ($8_{1,7}-7_{2,6}$), possibly suggesting the presence of a maser line. Column densities and fractional abundanc...

  10. Historical Time Line and Information About the Hanford Site

    SciTech Connect (OSTI)

    Briggs Jr, David

    2001-03-07T23:59:59.000Z

    Historical time line of the Hanford Site spanning from 1940 through 1997, including photographs and other information regarding the town sites and living conditions.

  11. EIS-0317: Kangley-Echo Lake Transmission Line Project

    Broader source: Energy.gov [DOE]

    This EIS analyzes BPA's proposal to build a new transmission line to accommodate increasing demand for electricity and ensure reliability in the Puget Sound area.

  12. ,"Energy","Water","Renewable","Petroleum","Alt. Fuel",,"On-Line...

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

    Energy","Water","Renewable","Petroleum","Alt. Fuel",,"On-Line Data Collection System",,"Report Period","Due In",,,"Primary","Secondary","Secondary" 2003,,,"EMS4","Environmental...

  13. The process of materials specifications for rubber lining

    SciTech Connect (OSTI)

    Earnest, R.A. [Polymeric Protective Linings, Livonia, MI (United States)

    1998-12-31T23:59:59.000Z

    Rubber is an engineered material with a long history of development, and application. The process of selecting the appropriate material for a given application is critical to the success of a lining project. A through knowledge of the process parameters for a rubber lined system will generate the information necessary to ensure maximum service life from the lining materials. Communication between the owner, applicator and manufacturer defines the process of material specification and selection. The goal of this process is to engineer the best fit for a rubber lining application.

  14. Emission Line Properties of the Large Bright Quasar Survey

    E-Print Network [OSTI]

    Karl Forster; Paul J. Green; Thomas L. Aldcroft; Marianne Vestergaard; Craig B. Foltz; Paul C. Hewett

    2000-11-20T23:59:59.000Z

    We present measurements of the optical/UV emission lines for a large homogeneous sample of 993 quasars from the Large Bright Quasar Survey. Our largely automated technique accounts for continuum breaks and galactic reddening, and we perform multicomponent fits to emission line profiles, including the effects of blended iron emission, and of absorption lines both galactic and intrinsic. Here we describe the fitting algorithm and present the results of line fits to the LBQS sample, including upper limits to line equivalent widths when warranted. The distribution of measured line parameters, principally equivalent width and FWHM, are detailed for a variety of lines, including upper limits. We thus initiate a large-scale investigation of correlations between the high energy continuum and emission lines in quasars, to be extended to complementary samples using similar techniques. High quality, reproducible measurements of emission lines for uniformly selected samples will advance our understanding of active galaxies, especially in a new era of large surveys selected by a variety of complementary methods.

  15. ac line conditioners: Topics by E-print Network

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

    of lines . ..2 Main Terasoma, Tomohide 83 Study of supplementary controls for embedded HVDC links in a AC power system. Open Access Theses and Dissertations Summary: ??This...

  16. Relativistic formulation for the Doppler-broadened line profile

    SciTech Connect (OSTI)

    Huang, Young-Sea; Chiue, Juang-Han; Huang, Yi-Chi; Hsiung, Te-Chih [Department of Physics, Soochow University, Shih-Lin, Taipei, Taiwan (China); Department of Physics, National Central University, Chung-Li, Taiwan (China)

    2010-07-15T23:59:59.000Z

    Profiles of spectral lines due to the thermal motion of light-emitting particles are formulated based on the classical and the relativistic Doppler effects, respectively. For the classical case, the well-known Doppler-broadened line profile is reproduced. For the relativistic case, the line profile obtained is asymmetrically broadened with increasing temperature. However, the peak frequency remains unshifted, in contrast to blueshifted, as has been predicted in the current literature. Reasoning is given as to why the relativistic Doppler-broadened line profile currently accepted is probably invalid.

  17. Electrical and Biological Effects of Transmission Lines: A Review.

    SciTech Connect (OSTI)

    Lee, Jack M.

    1989-06-01T23:59:59.000Z

    This review describes the electrical properties of a-c and d-c transmission lines and the resulting effects on plants, animals, and people. Methods used by BPA to mitigate undesirable effects are also discussed. Although much of the information in this review pertains to high-voltage transmission lines, information on distribution lines and electrical appliances is included. The electrical properties discussed are electric and magnetic fields and corona: first for alternating-current (a-c) lines, then for direct current (d-c).

  18. V

    Office of Scientific and Technical Information (OSTI)

    Livennore National Laboratory (LLNL) for the USHRC (U) which employs the Monte Carlo simulation, has been modified to simulate th. . . ' ' history of PWR feedwater lines,...

  19. On-line construction of position heaps Gregory Kucherov

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    On-line construction of position heaps Gregory Kucherov Abstract We propose a simple linear-time on-line algorithm for constructing a po- sition heap for a string [EMOW11]. Our definition of position heap differs order of length. Our construction is based on classic suffix pointers and resembles the Ukkonen

  20. Power line harmonic radiation (PLHR) observed by the DEMETER spacecraft

    E-Print Network [OSTI]

    Santolik, Ondrej

    Power line harmonic radiation (PLHR) observed by the DEMETER spacecraft F. Nemec,1,2 O. Santoli´k,3 January 2006; published 22 April 2006. [1] Results of a systematic survey of Power Line Harmonic Radiation from the electric power systems which are magnetically conjugated with the place of observation

  1. Power line harmonic radiation: A systematic study using DEMETER spacecraft

    E-Print Network [OSTI]

    Santolik, Ondrej

    Power line harmonic radiation: A systematic study using DEMETER spacecraft F. Nemec a,b,*, O of a systematic survey of Power line harmonic radiation (PLHR) observed by the DEMETER spacecraft. DEME- TER frequency spacing corresponds well to the power system frequency at anticipated source locations. Moreover

  2. CANDEL: Product Line Based Dynamic Context Management for Pervasive Applications

    E-Print Network [OSTI]

    Liu, Xiaodong

    , it is essential for computing applications to be context-aware. However, one of the major challenges the context as a dynamic product line composed of context primitives (CPs). Frame based software product line techniques are used together with OWL ontology to define CPs and to dynamically generate the current context

  3. Original article Neonatal performances in 3 lines of rabbit

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    relationship (linear regression coefficient 0.96 0.05 and 0.97 0.06). Non differences among the lines were line A (selected for litter size at weaning) showed curve-linear regression coefficient in the 3 1994) Summary The linear and curve-linear relationship between the total number of born young

  4. Transthoracic Lines Infants and children undergoing open heart

    E-Print Network [OSTI]

    Kay, Mark A.

    physician. All lines should have either heparinized saline or D5W infusing. Change the dressing with sternal by side. Normal RA values are 1-7mmHg. Transduce one port; vasoactive infusions typically are in the other port. Avoid infusing other solutions with vasoactive infusions. The RA line may be used for continuous

  5. Recognition of On-Line Handwritten Patterns Through Shape Metamorphosis

    E-Print Network [OSTI]

    methods that handles collectively cursive words, and hand-drawn line figures. The proposed system achieves-line handwritten patterns. It proposes the use of physics-based shape metamorphosis as a poten- tially powerful way time (to the best of our knowledge) it is used for recognition purposes. The proposed system uses

  6. Connections between the Lines: Augmenting Social Networks with Text

    E-Print Network [OSTI]

    Boyd-Graber, Jordan

    -Graber, David M. Blei KDD 09 June 29th, 2009 Princeton University Identity Guidelines Signature or wordmark Jonathan Chang, Jordan Boyd-Graber, David M. Blei Connections between the Lines #12;Motivation Data. Jonathan Chang, Jordan Boyd-Graber, David M. Blei Connections between the Lines #12;Motivation Annotating

  7. The millimeter-wave properties of superconducting microstrip lines

    E-Print Network [OSTI]

    The millimeter-wave properties of superconducting microstrip lines A. Vayonakis, C. Luo , H of the millimeter-wave properties of superconducting thin-film microstrip transmission lines. Our exper- imental, with a temperature-independent loss tangent of 5 3 0 5 10 3 for our samples. INTRODUCTION Superconducting

  8. Online Transmission Line Loadability Assessment Using Synchrophasor Measurements

    E-Print Network [OSTI]

    Liberzon, Daniel

    a stable operation. Transmission line loading limits are also essential to deter- mine locational marginal loading margins provide a useful metric to operate the power sys- tem to satisfy demands while ensuring prices in power markets. Therefore, the assessment of transmission line loadability under various

  9. Transmission Line Boundary Protection Using Wavelet Transform and Neural Network

    E-Print Network [OSTI]

    use data from two ends. The non-unit protection such as distance relay, can not protect the entire end only. In this case, the relay at one end can protect the entire line length with no intentional1 Transmission Line Boundary Protection Using Wavelet Transform and Neural Network Nan Zhang

  10. Rubber lining for FGD scrubbers for waste incinerator plants

    SciTech Connect (OSTI)

    Rullmann, H.E. [Smith Corrosion Services, Inc., Houston, TX (United States)

    1999-11-01T23:59:59.000Z

    Flue gas desulfurization scrubbers for waste incineration plants can be lined with soft rubber or hard rubber for corrosion protection. Hard rubber is cured under high temperature and pressure in an autoclave. The advantage of hard rubber is the excellent temperature and chemical resistance. The authors have experience with hard rubber lined scrubbers that are in service without failures for over 20 years.

  11. Virtual Cinematography of Group Scenes using Hierarchical Lines of Actions

    E-Print Network [OSTI]

    Casanova, Henri

    Virtual Cinematography of Group Scenes using Hierarchical Lines of Actions Kaveh Kardan Henri the heuristics of good cinematography. More specifically, our main contributions are the a method for defining hierarchical lines of action and the identification and use of relevant first principles of cinematography

  12. EIS-0474: Southline Transmission Line Project; Arizona and New Mexico

    Broader source: Energy.gov [DOE]

    DOEs Western Area Power Administration is preparing this EIS to evaluate the environmental impacts of the proposed Southline Transmission Project, which would consist of a new 225-mile transmission line between existing substations at Afton, New Mexico, and Apache, Arizona, and improvements to approximately 130 miles of existing transmission lines between the Apache and Saguaro, Arizona substations.

  13. Structural Optimization of High Voltage Transmission Line Towers considering

    E-Print Network [OSTI]

    Colominas, Ignasi

    Structural Optimization of High Voltage Transmission Line Towers considering Continuum and Discrete/or to common designs largely repeated (e.g. automotive compo- nents), and high voltage transmission towers can than conventional designs of high voltage transmission line towers. The optimization model proposed

  14. 15 Software Product Line Engineering with the UML: Deriving Products

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    15 Software Product Line Engineering with the UML: Deriving Products T. Ziadi and J.-M. Jzquel Abstract Software product line engineering introduces two new dimensions into the traditional engineering of software-based systems: the variability modeling and the product derivation. The variability gathers

  15. On-Line Transient Stability Assessment Scoping Study

    E-Print Network [OSTI]

    On-Line Transient Stability Assessment Scoping Study Final Project Report Power Systems Engineering PSERC #12;Power Systems Engineering Research Center On-Line Transient Stability Assessment Scoping Study With the increase in transactions on the bulk power system, there is a critical need to determine transient security

  16. Probing Active Galactic Nuclei with the Iron Line

    E-Print Network [OSTI]

    that the iron line profile around a Kerr black hole is wider due to additional gravitational red- shifting. Continuum components: 1. X-ray power law 2. Broad emission lines (Fe K) 3. Inverse compton reflection 4 spectrum. Panel b employs a power-law to model the spectrum. Panel c employs a power law and broad Gaussian

  17. EIS-0101: Thermopolis, Alcova, Casper Transmission Line Project

    Broader source: Energy.gov [DOE]

    The Western Area Power Administration developed this statement to evaluate the environmental impacts of constructing, operating and maintaining a 230-kilovolt transmission line between Thermopolis, Wyoming, and Alcova, Wyoming, and a 230/345-kilovolt transmission line between Alcova, Wyoming, and Casper, Wyoming.

  18. Nonlinear Free Vibrations of Coupled Spans of Overhead Transmission Lines

    E-Print Network [OSTI]

    Rienstra, Sjoerd W.

    -elastic instability is known as galloping [15]. For high enough amplitudes neighbouring conductors may get close of the phenomenon of galloping, which is a high amplitude periodic oscillation of overhead transmission lines due for galloping control. 1 Introduction Overhead transmission lines for transport of high-voltage electricity

  19. absorption line quasars: Topics by E-print Network

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

    absorption line quasars 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 Quasar Absorption Lines...

  20. absorption lines ii: Topics by E-print Network

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

    absorption lines ii 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 ABSORPTION LINE SURVEY OF H 3...

  1. absorption line quasar: Topics by E-print Network

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

    absorption line quasar 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 Quasar Absorption Lines...

  2. absorption line systems: Topics by E-print Network

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

    absorption line systems 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 Clustering of absorption line...

  3. Theoretical X-ray Line Profiles from Colliding Wind Binaries

    E-Print Network [OSTI]

    Henley, D B; Pittard, J M

    2003-01-01T23:59:59.000Z

    We present theoretical X-ray line profiles from a range of model colliding wind systems. In particular, we investigate the effects of varying the stellar mass-loss rates, the wind speeds, and the viewing orientation. We find that a wide range of theoretical line profile shapes is possible, varying with orbital inclination and phase. At or near conjunction, the lines have approximately Gaussian profiles, with small widths (HWHM ~ 0.1 v_infty) and definite blue- or redshifts (depending on whether the star with the weaker wind is in front or behind). When the system is viewed at quadrature, the lines are generally much broader (HWHM ~ v_infty), flat-topped and unshifted. Local absorption can have a major effect on the observed profiles - in systems with mass-loss rates of a few times 10^{-6} Msol/yr the lower energy lines (E wind of the primary. The orbital variation ...

  4. Line graphs e contrazioni: un approccio rigoroso alla space syntax

    E-Print Network [OSTI]

    D'Autilia, Roberto

    2015-01-01T23:59:59.000Z

    The methods of the space syntax have been the subject of extensive discussion, and several techniques to identify the axis lines have been proposed. The space syntax can be represented in terms of line graph, a graphs defined on the edge of a given primary graph. By means of the line graph algorithms, a system of labels defined on the edges of the primary graph is transformed into a system of labels on the vertices of the line graph. The contraction of adjacent edges with the same label allows to build a more general graph than those generated with the methods of the space syntax. By means of the functions implemented in Mathematica is therefore possible to redefine the space syntax on any system of urban quantities (labels) and reproduce the results of the axial lines as a special case. As an example is discussed a possible application of the method to the urban noise analysis.

  5. [NeII] emission line profiles from photoevaporative disc winds

    E-Print Network [OSTI]

    R. D. Alexander

    2008-09-01T23:59:59.000Z

    I model profiles of the [NeII] forbidden emission line at 12.81um, emitted by photoevaporative winds from discs around young, solar-mass stars. The predicted line luminosities (~ 1E-6 Lsun) are consistent with recent data, and the line profiles vary significantly with disc inclination. Edge-on discs show broad (30-40km/s) double-peaked profiles, due to the rotation of the disc, while in face-on discs the structure of the wind results in a narrower line (~10km/s) and a significant blue-shift (5-10km/s). These results suggest that observations of [NeII] line profiles can provide a direct test of models of protoplanetary disc photoevaporation.

  6. EHV transmission line design opportunities for cost reduction

    SciTech Connect (OSTI)

    Kennon, R.E. (Electric Power Research Inst., Palo Alto, CA (USA)); Douglass, D.A. (Power Technologies, Inc., New York, NY (US))

    1990-04-01T23:59:59.000Z

    The design of transmission lines is often limited to a few standard conductors and structures in order to minimize the costs of engineering, construction, inventory, and speed of damage restoration. Certain design factors, such as unloaded conductor tensions, maximum allowable conductor temperatures, and phase spacing to avoid ice galloping induced flashovers, are also fixed. Limiting the designer's choices can be economic in certain situations but not in others. What makes economic sense in flat terrain or with a lightly loaded line may not be economic in hilly terrain or with a line whose electric load is consistently high. This paper considers a range of line optimization techniques which can be applied to decide whether standard or optimized line designs are appropriate. It is found that even simple methods of optimization can help the designer keep his costs to a minimum.

  7. PWR Fuel Shipping Limits & RNP Core Design

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

    operating reserve at all nuclear units Spent fuel shipping program to reduce inventories at Brunswick and Robinson Maximize use of Harris spent fuel pools 5 Transportation...

  8. Filtered-vented containment systems. [PWR; BWR

    SciTech Connect (OSTI)

    Benjamin, A.S.; Walling, H.C.; Cybulskis, P.; DiSalvo, R.

    1980-01-01T23:59:59.000Z

    The potential benefits of filtered-vented containment systems as a means for mitigating the effects of severe accidents are analyzed. Studies so far have focused upon two operating reactor plants in the United States, a large-containment pressurized water reactor and a Mark I containment boiling water reactor. Design options that could be retrofitted to these plants are described including single-component once-through venting systems, multiple-component systems with vent and recirculation capabilities, and totally contained venting systems. A variety of venting strategies are also described which include simple low-volume containment pressure relief strategies and more complicated, high-volume venting strategies that require anticipatory actions. The latter type of strategy is intended for accidents that produce containment-threatening pressure spikes.

  9. Evaluation of condensate polishers. Final report. [PWR

    SciTech Connect (OSTI)

    Lurie, S.W.

    1983-06-01T23:59:59.000Z

    The potential for steam generator corrosion caused by the release of resins or soluble impurity chemicals from full-flow condensate polishing was evaluated in a series of high temperature tests. The tests were designed to operate within the then prevailing NSSS steam generator chemistry specifications, consistent with realistic release of these impurities to steam generators. Each potential corrodent was tested separately in the absence of other corrosive conditions.

  10. Harquahala Valley Pwr District | 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 are8COaBulkTransmissionSitingProcess.pdfGetec AG| OpenInformation Handbook forHansungHarney

  11. Effect of Contact Line Curvature on Solid-Fluid Surface Tensions Without Line Tension C. A. Ward* and Jiyu Wu

    E-Print Network [OSTI]

    Ward, Charles A.

    Effect of Contact Line Curvature on Solid-Fluid Surface Tensions Without Line Tension C. A. Ward neglected adsorption at the solid-liquid interface and its effect on the surface tension of this interface-liquid interface can be determined, as can the surface tensions of the solid-liquid and solid-vapor interfaces. DOI

  12. Theoretical X-ray Line Profiles from Colliding Wind Binaries

    E-Print Network [OSTI]

    D. B. Henley; I. R. Stevens; J. M. Pittard

    2003-06-23T23:59:59.000Z

    We present theoretical X-ray line profiles from a range of model colliding wind systems. In particular, we investigate the effects of varying the stellar mass-loss rates, the wind speeds, and the viewing orientation. We find that a wide range of theoretical line profile shapes is possible, varying with orbital inclination and phase. At or near conjunction, the lines have approximately Gaussian profiles, with small widths (HWHM ~ 0.1 v_\\infty) and definite blue- or redshifts (depending on whether the star with the weaker wind is in front or behind). When the system is viewed at quadrature, the lines are generally much broader (HWHM ~ v_\\infty), flat-topped and unshifted. Local absorption can have a major effect on the observed profiles - in systems with mass-loss rates of a few times 10^{-6} Msol/yr the lower energy lines (E wind of the primary. The orbital variation of the line widths and shifts is reduced in a low inclination binary. The extreme case is a binary with i = 0 degrees, for which we would expect no line profile variation.

  13. Stainless steel submerged arc weld fusion line toughness

    SciTech Connect (OSTI)

    Rosenfield, A.R.; Held, P.R.; Wilkowski, G.M. [Battelle, Columbus, OH (United States)

    1995-04-01T23:59:59.000Z

    This effort evaluated the fracture toughness of austenitic steel submerged-arc weld (SAW) fusion lines. The incentive was to explain why cracks grow into the fusion line in many pipe tests conducted with cracks initially centered in SAWS. The concern was that the fusion line may have a lower toughness than the SAW. It was found that the fusion line, Ji. was greater than the SAW toughness but much less than the base metal. Of greater importance may be that the crack growth resistance (JD-R) of the fusion line appeared to reach a steady-state value, while the SAW had a continually increasing JD-R curve. This explains why the cracks eventually turn to the fusion line in the pipe experiments. A method of incorporating these results would be to use the weld metal J-R curve up to the fusion-line steady-state J value. These results may be more important to LBB analyses than the ASME flaw evaluation procedures, since there is more crack growth with through-wall cracks in LBB analyses than for surface cracks in pipe flaw evaluations.

  14. Phase II beam lines at the National Synchrotron Light Source

    SciTech Connect (OSTI)

    Thomlinson, W.

    1984-06-01T23:59:59.000Z

    The expansion of the National Synchrotron Light Source has been funded by the US Department of Energy. The Phase II program consists of both increased conventional facilities and six new beam lines. In this paper, an overview of the six beam lines which will be constructed during Phase II is presented. For five of the lines special radiation sources are necessary and the designs of four of the devices are complete. The relevant parameters of the insertion devices under construction and development are presented.

  15. Balmer Absorption Lines in FeLoBALs

    E-Print Network [OSTI]

    K. Aoki; I. Iwata; K. Ohta; N. Tamura; M. Ando; M. Akiyama; G. Kiuchi; K. Nakanishi

    2006-12-14T23:59:59.000Z

    We discovered non-stellar Balmer absorption lines in two many-narrow-trough FeLoBALs (mntBALs) by the near-infrared spectroscopy with Subaru/CISCO. Presence of the non-stellar Balmer absorption lines is known to date only in the Seyfert galaxy NGC 4151, thus our discovery is the first cases for quasars. Since all known active galactic nuclei with Balmer absorption lines share characteristics, it is suggested that there is a population of BAL quasars which have unique structures at their nuclei or unique evolutionary phase.

  16. Line Strengths and Line Strength Gradients in Bulges along the Hubble Sequence

    E-Print Network [OSTI]

    P. Goudfrooij; J. Gorgas; P. Jablonka

    1999-10-01T23:59:59.000Z

    We present first results of a comprehensive survey of deep long-slit spectra along the minor axis of bulges of edge-on spiral galaxies. Our results indicate that stellar populations in bulges are fairly old and encompass a range of metallicities. The luminosity-weighted ages of bulges range from those found for cluster ellipticals to slightly ``younger'' (by up to only a few Gyr, however). Their $\\alpha$/Fe element ratio is typically supersolar, consistent with those found in giant ellipticals. The radial line-strength gradients in bulges correlate with bulge luminosity. Generally, these findings are more compatible with predictions of the ``dissipative collapse'' model than with those of the ``secular evolution'' model.

  17. Accretion disk wind in the AGN broad-line region: Spectroscopically resolved line profile variations in Mrk110

    E-Print Network [OSTI]

    W. Kollatschny

    2003-06-19T23:59:59.000Z

    Detailed line profile variability studies of the narrow line Seyfert 1 galaxy Mrk110 are presented. We obtained the spectra in a variability campaign carried out with the 9.2m Hobby-Eberly Telescope at McDonald Observatory. The integrated Balmer and Helium (HeI,II) emission lines are delayed by 3 to 33 light days to the optical continuum variations respectively. The outer wings of the line profiles respond much faster to continuum variations than the central regions. The comparison of the observed profile variations with model calculations of different velocity fields indicates an accretion disk structure of the broad line emitting region in Mrk110. Comparing the velocity-delay maps of the different emission lines among each other a clear radial stratification in the BLR can be recognized. Furthermore, delays of the red line wings are slightly shorter than those of the blue wings. This indicates an accretion disk wind in the BLR of Mrk110. We determine a central black hole mass of M = $1.8\\cdot10^{7} M_{\\odot}$. Because of the poorly known inclination angle of the accretion disk this is a lower limit only.

  18. Oxford Colleges On-line Reports for Tutorials

    E-Print Network [OSTI]

    Oxford, University of

    OxCORT Oxford Colleges On-line Reports for Tutorials Tutor Role Version 4.5 BSP Training TeamCORT..........................................................................5 Roles in OxCORT..................................................................................5 of Revision Class reports.......................................................8 Report states

  19. EA-1946: Salem-Albany Transmission Line Rebuild Project; Polk...

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

    rebuild of the 24-mile Salem-Albany No. 1 and 28-mile Salem-Albany No. 2 transmission lines between Salem and Albany, Oregon. Additional information is available at the...

  20. EA-1891: Alvey-Fairview Transmission Line Rebuild Project, Oregon

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts of a proposal to rebuild DOEs Bonneville Power Administrations Alvey-Fairview No. 1 230-kV transmission line located between Eugene, Oregon, and Coquille, Oregon.

  1. Niwot Ridge CRN Station Up & On-Line.

    E-Print Network [OSTI]

    Niwot Ridge CRN Station Up & On-Line. I made a decision after the Science Panel Review to put tree removal Wind Speed 3, terrain elevation change Solar Radiation 3, solar shading to west #12;

  2. Wireless Sensor Network for Electric Transmission Line Monitoring

    SciTech Connect (OSTI)

    Alphenaar, Bruce

    2009-06-30T23:59:59.000Z

    Generally, federal agencies tasked to oversee power grid reliability are dependent on data from grid infrastructure owners and operators in order to obtain a basic level of situational awareness. Since there are many owners and operators involved in the day-to-day functioning of the power grid, the task of accessing, aggregating and analyzing grid information from these sources is not a trivial one. Seemingly basic tasks such as synchronizing data timestamps between many different data providers and sources can be difficult as evidenced during the post-event analysis of the August 2003 blackout. In this project we investigate the efficacy and cost effectiveness of deploying a network of wireless power line monitoring devices as a method of independently monitoring key parts of the power grid as a complement to the data which is currently available to federal agencies from grid system operators. Such a network is modeled on proprietary power line monitoring technologies and networks invented, developed and deployed by Genscape, a Louisville, Kentucky based real-time energy information provider. Genscape measures transmission line power flow using measurements of electromagnetic fields under overhead high voltage transmission power lines in the United States and Europe. Opportunities for optimization of the commercial power line monitoring technology were investigated in this project to enable lower power consumption, lower cost and improvements to measurement methodologies. These optimizations were performed in order to better enable the use of wireless transmission line monitors in large network deployments (perhaps covering several thousand power lines) for federal situational awareness needs. Power consumption and cost reduction were addressed by developing a power line monitor using a low power, low cost wireless telemetry platform known as the ''Mote''. Motes were first developed as smart sensor nodes in wireless mesh networking applications. On such a platform, it has been demonstrated in this project that wireless monitoring units can effectively deliver real-time transmission line power flow information for less than $500 per monitor. The data delivered by such a monitor has during the course of the project been integrated with a national grid situational awareness visualization platform developed by Oak Ridge National Laboratory. Novel vibration energy scavenging methods based on piezoelectric cantilevers were also developed as a proposed method to power such monitors, with a goal of further cost reduction and large-scale deployment. Scavenging methods developed during the project resulted in 50% greater power output than conventional cantilever-based vibrational energy scavenging devices typically used to power smart sensor nodes. Lastly, enhanced and new methods for electromagnetic field sensing using multi-axis magnetometers and infrared reflectometry were investigated for potential monitoring applications in situations with a high density of power lines or high levels of background 60 Hz noise in order to isolate power lines of interest from other power lines in close proximity. The goal of this project was to investigate and demonstrate the feasibility of using small form factor, highly optimized, low cost, low power, non-contact, wireless electric transmission line monitors for delivery of real-time, independent power line monitoring for the US power grid. The project was divided into three main types of activity as follows; (1) Research into expanding the range of applications for non-contact power line monitoring to enable large scale low cost sensor network deployments (Tasks 1, 2); (2) Optimization of individual sensor hardware components to reduce size, cost and power consumption and testing in a pilot field study (Tasks 3,5); and (3) Demonstration of the feasibility of using the data from the network of power line monitors via a range of custom developed alerting and data visualization applications to deliver real-time information to federal agencies and others tasked with grid reliability (Tasks 6,8)

  3. Internal-integral sodium return line for sodium heat engine

    DOE Patents [OSTI]

    Hunt, Thomas K. (Ann Arbor, MI)

    1985-01-01T23:59:59.000Z

    A thermoelectric generator device which converts heat energy to electrical energy. An alkali metal is used with a solid electrolyte and a portion of the return line for the alkali metal is located within the generator vacuum space.

  4. Mechanisms of lead transport in two intestinal epithelial cell lines

    E-Print Network [OSTI]

    Dekaney, Christopher Matthew

    1996-01-01T23:59:59.000Z

    through the intestinal epithelium. Using two established intestinal epithelial cell lines, IEC-6 and Caco-2, we studied the effects of temperature, metabolic inhibitors, sulfhydryl group modifiers, blocking of integrins with the tripeptide Arginine...

  5. EIS-0106: Great Falls-Conrad Transmission Line Project, Montana

    Broader source: Energy.gov [DOE]

    The Western Area Power Administration prepared this EIS to evaluate the environmental impacts of the construction and operation of a 230-kilovolt transmission line from Great Falls, Montana, to Conrad, Montana.

  6. ROTATING LINE CAMERAS: EPIPOLAR GEOMETRY AND SPATIAL SAMPLING

    E-Print Network [OSTI]

    project 3D scenes on a cylindric sur- face, where one or multiple rotating sensor lines allow to compose for controlling this error, allowing to adjust the camera position- ing at the time of photo shooting. The report

  7. Nondestructive Testing of Overhead Transmission Lines: Numerical and Experimental Investigation

    E-Print Network [OSTI]

    Kulkarni, Salil Subhash

    2011-02-22T23:59:59.000Z

    line is the primary reason for absence of a theoretical solution to get the analytical dispersion curves. The numerical results are then verified with experimental tests using a non-contact and broadband laser detection technique. The methodology...

  8. Electric Companies and Electric Transmission Lines (North Dakota)

    Broader source: Energy.gov [DOE]

    The Public Service Commission has the authority to regulate the construction, operation, and maintenance of electrical supply lines, and to issue additional rules for this purpose. Section 49-21.1...

  9. area steam line: Topics by E-print Network

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

    Mitchell, D. R. 4 Pressure drops for direct steam generation in line-focus solar thermal systems Renewable Energy Websites Summary: the focus of the solar collector, and then...

  10. Line-of-Credit to Term Loans (Connecticut)

    Broader source: Energy.gov [DOE]

    CDAs Line-of-Credit to Term Loans good for one year for capital expenditures, converting to a fully amortizing term loan. Funds may be used for building expansion, equipment, or IT upgrades.

  11. Successful corrosion protection in FGD plants utilizing rubber lining

    SciTech Connect (OSTI)

    Fenner, J. [Keramchemie GmbH, Siershahn (Germany); Peavy, M. [Smith Corrosion Services, Inc., Houston, TX (United States)

    1997-09-01T23:59:59.000Z

    In the late 1970`s--and predominantly in the mid-1980`s--when the construction of flue gas desulfurization plants in Germany was still in its early stages, both the US and Japan had already accumulated several years of experience in the operation of such plants. Whereas Japan adopted the almost exclusive use of synthetic resin coatings--usually as flake coatings--applied on carbon steel as structural material, all three corrosion protection materials mentioned here (rubber linings, synthetic resin coatings, and stainless steel coatings) were applied in the US--in addition, stainless steel was also utilized as structural material. On the other hand, in Germany the use of soft rubber linings was much more widespread. The paper discusses rubber linings as corrosion protection and the experience gained with rubber linings in flue gas desulfurization plants.

  12. auroral field lines: Topics by E-print Network

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

    is found to influence substantially the solar wind parameters, reducing the asymptotic speed ... Li, Bo; Chen, Yao 2011-01-01 27 On the fields due to line segments CERN Preprints...

  13. annihilation line emission: Topics by E-print Network

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

    lines Astrophysics (arXiv) Summary: We propose an emission mechanism of prompt gamma-ray bursts (GRBs) that can reproduce the observed non-thermal spectra with high radiative...

  14. Federal Line Management Oversight of Department of Energy Nuclear Facilities

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2014-04-14T23:59:59.000Z

    The Guide was developed in support of DOE O 226.1B to provide guidance that may be useful to DOE line management organizations in meeting the provisions of that order when applied to nuclear facilities.

  15. Open Line, Assistant Professor, Associate Professor, or Professor Melanoma Investigator

    E-Print Network [OSTI]

    Ford, James

    Open Line, Assistant Professor, Associate Professor, or Professor Melanoma in the Department of Medicine at Stanford University is recruiting a melanoma physician research program, teach fellows, and participate in the melanoma oncology clinics

  16. On-line hydraulic state prediction for water distribution systems

    E-Print Network [OSTI]

    Whittle, Andrew

    This paper describes and demonstrates a method for on?line hydraulic state prediction in urban water networks. The proposed method uses a Predictor?Corrector (PC) approach in which a statistical data?driven algorithm is ...

  17. Emission Lines and the Spectral Energy Distributions of Quasars

    E-Print Network [OSTI]

    B. J. Wilkes; P. J. Green; S. Mathur; J. C. McDowell

    1996-08-05T23:59:59.000Z

    Many years of study have failed to conclusively establish relations between a quasar's spectral energy distribution (SED) and the emission lines it is thought to produce. This is at least partially due to the lack of well-observed SEDs. We present initial results from a line--SED study for a sample of 43 quasars and active galaxies for which we have optical and ultra-violet spectra and far-infrared--X-ray SEDs. We present the results of tests for correlations between line equivalent widths and SED luminosity and slope parameters and compare these results to those from earlier studies. We find that the Baldwin effect is weaker when the luminosity is defined close to the ionising continuum of that line and conclude that the detailed SED is likely to be important in making further progress.

  18. A framework for on-line simulation systems

    E-Print Network [OSTI]

    Drake, Glenn Richardson

    1996-01-01T23:59:59.000Z

    Simulation has traditionally been used for off-line planning and design. The advent of computer integrated manufacturing and flexible manufacturing systems has increased interest in shop floor control systems that use simulation technology for real-time...

  19. Federal Line Management Oversight of Department of Energy Nuclear Facilities

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2013-04-04T23:59:59.000Z

    The Guide was developed in support of DOE O 226.1B to provide guidance that may be useful to DOE line management organizations in meeting the provisions of that order when applied to nuclear facilities.

  20. assembly line balancing: Topics by E-print Network

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

    algorithms for time and space assembly line balancing Manuel Chica a,?, O Barcelona, Spain a r t i c l e i n f o Available online 1 June 2011 Keywords: Time and space assembly...

  1. A STUDY OF ION LINE BROADENING IN THE TORMAC DISCHARGE.

    E-Print Network [OSTI]

    Shaw, Robert Stephen

    2010-01-01T23:59:59.000Z

    by the thermal Doppler effect. For Zaxwellian ions, the linedue to the thermal Doppler effect, indicates that the Tormacof the line by the Doppler effect. Due to the finite

  2. Continuum and line emission of flares on red dwarf stars

    E-Print Network [OSTI]

    Morchenko, Egor; Livshits, Moisey

    2015-01-01T23:59:59.000Z

    The emission spectrum has been calculated of a homogeneous pure hydrogen layer, which parameters are typical for a flare on a red dwarf. The ionization and excitation states were determined by the solution of steady-state equations taking into account the continuum and all discrete hydrogen levels. We consider the following elementary processes: electron-impact transitions, spontaneous and induced radiative transitions, and ionization by the bremsstrahlung and recombination radiation of the layer itself. The Biberman--Holstein approximation was used to calculate the scattering of line radiation. Asymptotic formulae for the escape probability are obtained for a symmetric line profile taking into account the Stark and Doppler effects. The approximation for the core of the H$-\\alpha$ line by a gaussian curve has been substantiated. The spectral intensity of the continuous spectrum, the intensity of the lines of the Balmer series and the magnitude of the Balmer jump have been calculated. The conditions have been ...

  3. On the P-coverage Problem on the Real Line

    E-Print Network [OSTI]

    Hoesel, Stan Van

    Abstract: In this paper we consider the p-coverage problem on the real line. We first give a detailed description of an algorithm to solve the coverage problem without the upper bound p on the number of open facilities. ...

  4. Performance analysis for lateral-line-inspired sensor arrays

    E-Print Network [OSTI]

    Fernandez, Vicente I

    2011-01-01T23:59:59.000Z

    The lateral line is a critical component of the fish sensory system, found to affect numerous aspects of behavior including maneuvering in complex fluid environments, schooling, prey tracking, and environment mapping. This ...

  5. Atomic lines in infrared spectra for ultracool dwarfs

    E-Print Network [OSTI]

    Yu. Lyubchik; H. R. A. Jones; Ya. V. Pavlenko; S. Viti; J. C. Pickering; R. Blackwell-Whitehead

    2003-12-22T23:59:59.000Z

    We provide a set of atomic lines which are suitable for the description of ultracool dwarf spectra from 10000 to 25000 \\AA. This atomic linelist was made using both synthetic spectra calculations and existing atlases of infrared spectra of Arcturus and Sunspot umbra. We present plots, which show the comparison of synthetic spectra and observed Arcturus and Sunspot umbral spectra for all atomic lines likely to be observable in high resolution infrared spectra.

  6. The Broad Line Region of AGN: Kinematics and Physics

    E-Print Network [OSTI]

    L. C. Popovic

    2006-12-23T23:59:59.000Z

    In this paper a discussion of kinematics and physics of the Broad Line Region (BLR) is given. The possible physical conditions in the BLR and problems in determination of the physical parameters (electron temperature and density) are considered. Moreover, one analyses the geometry of the BLR and the probability that (at least) a fraction of the radiation in the Broad Emission Lines (BELs) originates from a relativistic accretion disk.

  7. Asbestos-free brake-lining materials for hydrogenerators

    SciTech Connect (OSTI)

    Lalonde, S.; Lanteigne, J. [Hydro-Quebec, Varennes, Quebec (Canada)

    1995-11-01T23:59:59.000Z

    Three different asbestos-free materials currently considered as new lining materials for hydrogenerator brakes were tested and compared to the original asbestos lining. Results show that these substitutes not only vary greatly from the original material in terms of mechanical properties and physical characteristics but also exhibit significantly different performances in braking tests. Consequently, these new materials are not entirely suitable for the intended application.

  8. Image-line voltage controlled oscillators and grating antennas

    E-Print Network [OSTI]

    Kirk, Alexander MacDonald

    1991-01-01T23:59:59.000Z

    IMAGE-LINE VOLTAGE CONTROLLED OSCILLATORS AND GRATING ANTENNAS A Thesis by ALEXANDER MacDONALD KIRK Submitted to the Office of Graduate Studies of Texas ABM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1991 Major Subject: Electrical Engineering IMAGE-LINE VOLTAGE CONTROLLED OSCILLATORS AND GRATING ANTENNAS A Thesis by ALEXANDER MacDONALD KIRK Approved as to style and content by: Kai Chang (Chair of Committee) Robert D. Nevels...

  9. Generating X-ray lines from annihilating dark matter

    E-Print Network [OSTI]

    Emilian Dudas; Lucien Heurtier; Yann Mambrini

    2014-05-08T23:59:59.000Z

    We propose different scenarios where a keV dark matter annihilates to produce a monochromatic signal. The process is generated through the exchange of a light scalar of mass of order 300 keV - 50 MeV coupling to photon through loops or higher dimensional operators. For natural values of the couplings and scales, the model can generate a gamma-ray line which can fit with the recently identified 3.5 keV X-ray line.

  10. Federal Line Management Oversight of Department of Energy Nuclear Facilities

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2011-04-25T23:59:59.000Z

    The purpose of this Guide is to provide U.S. Department of Energy (DOE) line management with guidance that may be useful to them in effectively and efficiently implementing the requirements of DOE O 226.1B, Implementation of Department of Energy Oversight Policy, date April 25, 2011, as applied to Federal line management of hazard category 1, 2, and 3 nuclear facilities.

  11. Structure and deformation mechanisms along the Tonale Line, n. Italy

    E-Print Network [OSTI]

    Welker, Mary Clare

    1985-01-01T23:59:59.000Z

    of Advisory Committee: John M. Logan Field observations and sampling are combined with petrofabric and fracture analyses to characterize the structure and deformation mechanisms related to a segment of the Tonale Line fault zone in northern Italy. Mylonite... microstructures and fabrics are developed superimposed by cataclasites and fault gouge; the latter being character istic of deformation at shallow depths. The ductile deformation associated with faulting along the Tonale Line occurred under greenschist...

  12. EIS-0507: Boardman-Hemingway Transmission Line, Oregon and Idaho

    Broader source: Energy.gov [DOE]

    The Bureau of Land Management and the U.S. Forest Service are preparing, with DOEs Bonneville Power Administration (BPA) as a cooperating agency, an EIS that evaluates the potential environmental impacts of a proposal to construct about 305 miles of 500-kV transmission line from northeast Oregon to southwest Idaho. BPAs proposed action is to partially fund part the transmission line.

  13. EUV emission lines and diagnostics observed with Hinode/EIS

    E-Print Network [OSTI]

    P. R. Young; G. Del Zanna; H. E. Mason; K. P. Dere; E. Landi; M. Landini; G. A. Doschek; C. M. Brown; J. L. Culhane; L. K. Harra; T. Watanabe; H. Hara

    2007-08-14T23:59:59.000Z

    Quiet Sun and active region spectra from the Hinode/EIS instrument are presented, and the strongest lines from different temperature regions discussed. A list of emission lines recommended to be included in EIS observation studies is presented based on analysis of blending and diagnostic potential using the CHIANTI atomic database. In addition we identify the most useful density diagnostics from the ions covered by EIS.

  14. Line Density Indice as an alternative to MK process

    E-Print Network [OSTI]

    M. Kuassivi

    2009-12-31T23:59:59.000Z

    73 broadband optical spectra of dwarf stars later than F0 have been obtained from the Nearby Stars Project website. The number of absorption lines is computed for each spectrum between 6000 and 6200 Angstrom. A correlation is found between the density of lines K$\\lambda$ and the spectral type. This method is independent of calibration process, does not require high resolution or high signal to noise data and does not make use of a large library of standard spectra.

  15. RESONANCES FOR MICROSTRIP TRANSMISSION LINES HABIB AMMARI y AND FAOUZI TRIKI y

    E-Print Network [OSTI]

    Ammari, Habib

    RESONANCES FOR MICROSTRIP TRANSMISSION LINES #3; HABIB AMMARI y AND FAOUZI TRIKI y Abstract of the line goes to zero. Key words. microstrip transmission lines, waveguides, resonances, characteristic in mi- crostrip transmission lines mounted on planar open waveguides. Microstrip transmis- sion lines

  16. Damping of bending waves in truss beams by electrical transmission lines with PZT actuators

    E-Print Network [OSTI]

    Boyer, Edmond

    Damping of bending waves in truss beams by electrical transmission lines with PZT actuators F. dell of the truss beam with an electrical transmission line by a line distribution of PZT actuators. It has been-order transmission line, and that such a line is not suitable to damp bending waves. In the present paper, we propose

  17. Optical emission line monitor with background observation and cancellation

    DOE Patents [OSTI]

    Goff, David R. (Star City, WV); Notestein, John E. (Morgantown, WV)

    1986-01-01T23:59:59.000Z

    A fiber optics based optical emission line monitoring system is provided in which selected spectral emission lines, such as the sodium D-line emission in coal combustion, may be detected in the presence of interferring background or blackbody radiation with emissions much greater in intensity than that of the emission line being detected. A bifurcated fiber optic light guide is adapted at the end of one branch to view the combustion light which is guided to a first bandpass filter, adapted to the common trunk end of the fiber. A portion of the light is reflected back through the common trunk portion of the fiber to a second bandpass filter adapted to the end of the other branch of the fiber. The first filter bandpass is centered at a wavelength corresponding to the emission line to be detected with a bandwidth of about three nanometers (nm). The second filter is centered at the same wavelength but having a width of about 10 nm. First and second light detectors are located to view the light passing through the first and second filters respectively. Thus, the second detector is blind to the light corresponding to the emission line of interest detected by the first detector and the difference between the two detector outputs is uniquely indicative of the intensity of only the combustion flame emission of interest. This instrument can reduce the effects of interferring blackbody radiation by greater than 20 dB.

  18. Ultraviolet Diagnostics for the Emission Line Gas in Active Galaxies

    E-Print Network [OSTI]

    M. G. Allen; M. A. Dopita; Z. I. Tsvetanov

    1998-01-06T23:59:59.000Z

    Optical diagnostic diagrams are frequently ambiguous as a test of the photoionization or fast shock models of the narrow line regions of active galaxies. Here, we present a set of UV line ratio diagrams which can discriminate between pure shock and photoionization modes of excitation, and to some extent, also discriminate shocks with ionized precursors from photoionization. These diagrams use relatively bright emission lines and reddening insensitive ratios and provide a practical observational test for separating the excitation mechanisms of the narrow line regions of active galaxies. The most useful diagrams are those involving the various ionization stages of Carbon, [OIII]5007/H-beta vs. CIV 1550/ HeII 1640 and the purely UV ratio pair CII] 2326 / CIII] 1909 vs. CIV 1550 / CIII]909. Temperature sensitive FUV lines CIII 977 and NIII 991 also provide good discriminants. The models are compared to observations of nearby AGN, and also to high redshift objects where the UV lines are shifted into the optical.

  19. Line bisectors and radial velocity jitter from SARG spectra

    E-Print Network [OSTI]

    A. F. Martinez Fiorenzano; R. G. Gratton; S. Desidera; R. Cosentino; M. Endl

    2005-08-03T23:59:59.000Z

    We present an analysis of spectral line bisector variations for a few stars observed in the SARG high precision radial velocity planet survey, and discuss their relationship with differential radial velocities. The spectra we consider are the same used for determining radial velocities. The iodine cell lines employed in the measurement of radial velocities were removed before bisector analysis. The line bisectors were then computed from average absorption profiles obtained by cross correlation of the stellar spectra with a mask made from suitable lines of a solar catalog. Bisector velocity spans were then determined: errors in these quantities compare well with theoretical expectations based on resolution, S/N and line shape. The plot of bisector velocity span against radial velocity was studied to search for correlations between line asymmetries and radial velocity variations. A correlation was seen for HD 166435 due to stellar activity, and for HD 8071B due to spectral contamination by the companion. No correlation was seen for 51 Peg and rho CrB, stars hosting planets. We conclude that this technique may be useful to separate radial velocity variations due to barycenter motion from spurious signals in spectra acquired with the iodine cell.

  20. Rehab permits desert line to run at original pressures

    SciTech Connect (OSTI)

    Kurdi, A.M.; Abougfeefa, M.S. (Agip Oil Co. Ltd., Tripoli (Libyan Arab Jamahiriya)); Denney, A.K. (John Brown Engineering and Constructors Ltd., London (United Kingdom))

    1993-07-26T23:59:59.000Z

    An extensive inspection and rehabilitation program on a 34-in. desert pipeline in gas-condensate service has restored the line to full operating pressures and ensured the line's active service life for at least 20 years. Since Agip Oil Co. Ltd. built the 133-km pipeline in 1972 using API 5L Grade X-60, it has suffered six known failures. There has been no single cause of the failures. As a consequence of the failures, the line has been progressively down rated from the original operating pressure of 700 psig to 500 psig. So that the line could again be operated between 650 and 700 psig, two options have been considered: extensive study and investigation leading to inspection and replacement of suspect pipe: total replacement of the line. These options were evaluated from economic and safety points of view. A major consideration was that the line will be operating in its current manner for only the next 2 years before changing to dry-gas transportation. The first option was therefore considered viable. The paper discusses the failure mechanisms, the history of hydrogen-induced cracking, the 1989 failure, survey results, calculation of acceptable pressures, and the rehabilitation program.

  1. Optical emission line monitor with background observation and cancellation

    DOE Patents [OSTI]

    Goff, D.R.; Notestein, J.E.

    1985-01-04T23:59:59.000Z

    A fiber optics based optical emission line monitoring system is provided in which selected spectral emission lines, such as the sodium D-line emission in coal combustion, may be detected in the presence of interferring background or blackbody radiation with emissions much greater in intensity than that of the emission line being detected. A bifurcated fiber optic light guide is adapted at the end of one branch to view the combustion light which is guided to a first bandpass filter, adapted to the common trunk end of the fiber. A portion of the light is reflected back through the common trunk portion of the fiber to a second bandpass filter adapted to the end of the other branch of the fiber. The first filter bandpass is centered at a wavelength corresponding to the emission line to be detected with a bandwidth of about three nanometers (nm). The second filter is centered at the same wavelength but having a width of about 10 nm. First and second light detectors are located to view the light passing through the first and second filters respectively. Thus, the second detector is blind to the light corresponding to the emission line of interest detected by the first detector and the difference between the two detector outputs is uniquely indicative of the intensity of only the combustion flame emission of interest. This instrument can reduce the effects of interfering blackbody radiation by greater than 20 dB.

  2. Overhearing in 802.11 mesh networks

    E-Print Network [OSTI]

    Afanasyev, Mikhail

    2009-01-01T23:59:59.000Z

    through a port on an HP 2626-PWR switch. There are sevenuplink, but no neighbors in the mesh. ) CDF of nodes Pwr5 Pwr 10 Pwr 15 Pwr 20 Pwr 30 Pwr 40 Pwr 50 Pwr 60

  3. Discovery of 17 new sharp-lined Ap stars with magnetically resolved lines

    E-Print Network [OSTI]

    L. M. Freyhammer; V. G. Elkin; D. W. Kurtz; G. Mathys; P. Martinez

    2008-06-17T23:59:59.000Z

    Chemically peculiar A stars (Ap) are extreme examples of the interaction of atomic element diffusion processes with magnetic fields in stellar atmospheres. The rapidly oscillating Ap stars provide a means for studying these processes in 3D and are at the same time important for studying the pulsation excitation mechanism in A stars. As part of the first comprehensive, uniform, high resolution spectroscopic survey of Ap stars, which we are conducting in the southern hemisphere with the Michigan Spectral Catalogues as the basis of target selection, we report here the discovery of 17 new magnetic Ap stars having spectroscopically resolved Zeeman components from which we derive magnetic field moduli in the range 3 - 30 kG. Among these are 1) the current second-strongest known magnetic A star, 2) a double-lined Ap binary with a magnetic component and 3) an A star with particularly peculiar and variable abundances. Polarimetry of these stars is needed to constrain their field geometries and to determine their rotation periods. We have also obtained an additional measurement of the magnetic field of the Ap star HD 92499.

  4. Line-driven disk wind models with an improved line force

    E-Print Network [OSTI]

    D. Proga; J. M. Stone; J. E. Drew

    1999-07-13T23:59:59.000Z

    We describe an efficient method of calculating the radiation pressure due to spectral lines, including all the terms in the velocity gradient tensor. We apply this method to calculate the two-dimensional, time-dependent structure of winds from luminous disks. Qualitative features of our new models are very similar to those we calculated including only the dominant terms in the tensor (Proga, Stone & Drew 1998, hereafter PSD). In particular, we find that models which displayed unsteady behaviour in PSD are also unsteady with the new method, and gross properties of the winds, such as mass-loss rate and characteristic velocity are not changed by the more accurate approach. The largest change caused by the new method is in the disk-wind opening angle: winds driven only by the disk radiation are more polar with the new method while winds driven by the disk and central object radiation are typically more equatorial. In the closing discussion, we provide further insight into the way the geometry of the radiation field and consequent flow determines the time properties of the flow.

  5. Plasma Diagnostics Through Analysis of Ne I Line Shape Characteristics

    SciTech Connect (OSTI)

    Milosavljevic, Vladimir [Faculty of Physics, University of Belgrade, P.O.B. 368, Belgrade (Serbia and Montenegro); School of Physics Sciences, Dublin City University, Glasnevin, Dublin 9 (Ireland)

    2004-12-01T23:59:59.000Z

    On the basis of the experimentally determined 26 prominent neutral neon (Ne I) line shapes (in the 3s-3p, 3s-3p', 3s'-3p', 3s'-3p and 3p-3d transitions) the basic plasma parameters i.e. electron temperature (T) and electron density (N) have been obtained using the line deconvolution procedure, in a plasma created in a linear, low-pressure, pulsed arc operated in pure neon. The mentioned plasma parameters have also been measured using independent experimental diagnostics techniques. Agreement has been found among the two sets of the obtained parameters. This recommends the deconvolution procedure for plasma diagnostical purposes. Self-confidence of the method has checked using Ne I spectral lines which originate from different energy levels. The advance used of the method has been done in the way to find energy level from which it does not existing any more assumption of LTE.This method may be of interest also in astrophysics where direct measurements of the main plasma parameters (T and N) are not possible. With the development of space born spectroscopy the good quality spectra will be enabling to use this method. The separate electron (We) and ion (Wi) contributions to the total Stark width (Wt), which have not been measured so far, have also been obtained for neon spectral lines. The measured and calculated We data are compared to available theoretical We values. It has found stronger influence of the ion contribution to the Ne I lines shape than the predicted ones calculated by the current theory. It has also tested the ion contribution to the Ne II lines shape. Small influence of the ion contribution to the some Ne II line shape has evidenced.

  6. What controls the [O III] 5007 line strength in AGN?

    E-Print Network [OSTI]

    Alexei Baskin; Ari Laor

    2005-02-22T23:59:59.000Z

    AGN display an extreme range in the narrow emission line equivalent widths. Specifically, in the PG quasar sample the equivalent width of the narrow [O III] 5007 line has a range of >300, while the broad Hb line, for example, has a range of 10 only. The strength of [O III] 5007 is modulated by the covering factor, CF, of the narrow line region (NLR) gas, its density n_e, and ionization parameter U. To explore which of these factors produces the observed large range in [O III] 5007 strength, we measure the strength of the matching narrow Hb and [O III] 4363 lines, detected in 40 out of the 87 z<0.5 PG quasars in the Boroson & Green sample. The photoionization code CLOUDY is then used to infer CF, n_e, and U in each object, assuming a single uniform emitting zone. We find that the range of CF (~0.02-0.2) contributes about twice as much as the range in both n_e and U towards modulating the strength of the [O III] 5007 line. The CF is inversely correlated with luminosity, but it is not correlated with L_Edd as previously speculated. The single zone [O III] 5007 emitting region is rather compact, having R=40L_44^0.45 pc. These emission lines can also be fit with an extreme two zone model, where [O III] 4363 is mostly emitted by a dense (n_e=10^7) inner zone at R=L_44^0.5 pc, and [O III] 5007 by a low density (n_e=10^3) extended outer zone at R=750L_44^0.34 pc. Such an extended [O III] 5007 emission should be well resolved by HST imaging of luminous AGN. Further constraints on the radial gas distribution in the NLR can be obtained from the spectral shape of the IR continuum emitted by the associated dust.

  7. The Business Case for Fuel Cells 2014: Powering the Bottom Line...

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

    4: Powering the Bottom Line for Businesses and Communities The Business Case for Fuel Cells 2014: Powering the Bottom Line for Businesses and Communities This report, written and...

  8. The Source of the Helium Visible Lines in Eta Carinae

    E-Print Network [OSTI]

    Kashi, A; Kashi, Amit; Soker, Noam

    2007-01-01T23:59:59.000Z

    We assume that the helium-I lines emitted by the massive binary system Eta Carinae are formed in the acceleration zone of the less-massive secondary star. We calculate the Doppler shift of the lines as a function of orbital phase and of several parameters of the binary system. We find that a good fit is obtained if the helium lines are formed in the region where the secondary wind speed is 430 km/sec. The acceptable binary eccentricity is in the range 0.9-0.95, and the inclination angle (the angle between a line perpendicular to the orbital plane and the line of sight) is in the range 40-55 degrees. Lower values of e require higher values of i, and vice versa. The binary system is oriented such that the secondary star is in our direction (closer to us) during periastron passage. The orbital motion can account in part to the Doppler shift of the peak in X-ray emission.

  9. The Source of the Helium Visible Lines in Eta Carinae

    E-Print Network [OSTI]

    Amit Kashi; Noam Soker

    2007-04-13T23:59:59.000Z

    We assume that the helium-I lines emitted by the massive binary system Eta Carinae are formed in the acceleration zone of the less-massive secondary star. We calculate the Doppler shift of the lines as a function of orbital phase and of several parameters of the binary system. We find that a good fit is obtained if the helium lines are formed in the region where the secondary wind speed is 430 km/sec. The acceptable binary eccentricity is in the range 0.9-0.95, and the inclination angle (the angle between a line perpendicular to the orbital plane and the line of sight) is in the range 40-55 degrees. Lower values of e require higher values of i, and vice versa. The binary system is oriented such that the secondary star is in our direction (closer to us) during periastron passage. The orbital motion can account in part to the Doppler shift of the peak in X-ray emission.

  10. Chemistry and line emission from evolving Herbig Ae disks

    E-Print Network [OSTI]

    B. Jonkheid; C. P. Dullemond; M. R. Hogerheijde; E. F. van Dishoeck

    2006-11-07T23:59:59.000Z

    Aims: To calculate chemistry and gas temperature of evolving protoplanetary disks with decreasing mass or dust settling, and to explore the sensitivity of gas-phase tracers. Methods: The density and dust temperature profiles for a range of models of flaring and self-shadowed disks around a typical Herbig Ae star are used together with 2-dimensional ultraviolet (UV) radiative transfer to calculate the chemistry and gas temperature. In each model the line profiles and intensities for the fine structure lines of [O I], [C II] and [C I] and the pure rotational lines of CO, CN, HCN and HCO+ are determined. Results: The chemistry shows a strong correlation with disk mass. Molecules that are easily dissociated, like HCN, require high densities and large extinctions before they can become abundant. The products of photodissociation, like CN and C2H, become abundant in models with lower masses. Dust settling mainly affects the gas temperature, and thus high temperature tracers like the O and C+ fine structure lines. The carbon chemistry is found to be very sensitive to the adopted PAH abundance. The line ratios CO/13CO, CO/HCO+ and [O I] 63 um/146 um can be used to distinguish between disks where dust growth and settling takes place, and disks that undergo overall mass loss.

  11. Multimode circuit QED with hybrid metamaterial transmission lines

    E-Print Network [OSTI]

    Daniel J. Egger; Frank K. Wilhelm

    2013-11-07T23:59:59.000Z

    Quantum transmission lines are a central to superconducting and hybrid quantum computing. Parallel to these developments are those of left-handed meta-materials. They have a wide variety of applications in photonics from the microwave to the visible range such as invisibility cloaks and perfect flat lenses. For classical guided microwaves, left-handed transmission lines have been proposed and studied on the macroscopic scale. We combine these ideas in presenting a left-handed/right-handed hybrid transmission line for applications in quantum optics on a chip. The resulting system allows circuit QED to reach a new regime: multi-mode ultra-strong coupling. Out of the many potential applications of this novel device, we discuss two; the preparation of multipartite entangled states and its use as a quantum simulator for the spin-boson model where a quantum phase transition is reached up to finite size-effects.

  12. Energy flow lines as light paths a didactical analysis

    E-Print Network [OSTI]

    Horn, M E

    2006-01-01T23:59:59.000Z

    Analyses of interviews with secondary school students about their conceptions of light at the University of Potsdam indicate that numerous students have a deterministic view of light. With regard to these results the model of energy flow lines, which has been discussed recently in the didactical literature, is of special interest. Following this model, light is presumed to move along energy flow lines as trajectories. In an analysis of the model of energy flow lines four didactical dimensions (didactical content, internal structure, present-day relevance and future significance) are investigated. It can be shown that a discussion of this model in physics at school can increase the meta-conceptional knowledge of the students about the models of light. On the other hand, this can promote deterministic conceptions and the Bohm interpretation of quantum mechanics. But the question remains: Should the nature of light really be described as deterministic?

  13. Lassoing Line Outages in the Smart Power Grid

    E-Print Network [OSTI]

    Zhu, Hao

    2011-01-01T23:59:59.000Z

    Fast and accurate unveiling of power line outages is of paramount importance not only for preventing faults that may lead to blackouts, but also for routine monitoring and control tasks of the smart grid, including state estimation and optimal power flow. Existing approaches are either challenged by the \\emph{combinatorial complexity} issues involved, and are thus limited to identifying single- and double-line outages; or, they invoke less pragmatic assumptions such as \\emph{conditionally independent} phasor angle measurements available across the grid. Using only a subset of voltage phasor angle data, the present paper develops a near real-time algorithm for identifying multiple line outages at the affordable complexity of solving a quadratic program via block coordinate descent iterations. The novel approach relies on reformulating the DC linear power flow model as a \\emph{sparse} overcomplete expansion, and leveraging contemporary advances in compressive sampling and variable selection using the least-abso...

  14. Africa planned gas lines will meet future demand

    SciTech Connect (OSTI)

    Not Available

    1991-11-01T23:59:59.000Z

    The burgeoning European market for natural gas is expected to create major gas line construction. The potential for North Africa looks particularly promising in 1991. Italy's ENI has proposed a 6,000-km (3,728-mi) gas network in North Africa to connect gas-rich Libya and Algeria with Morocco and Mauritania, making large volumes available to the European market. According to the proposal, a gas line would run from the Sirte Basin in Libya west to Mauritania. Extending the line eastward through Egypt and on to the Arabian Peninsula would provide export access. In this paper initial studies are examine reserve projections for the next 20 years, then based on results, a transmission/distribution network will be designed, including an offshore gathering system.

  15. Line temperatures and elemental abundances in HII galaxies

    E-Print Network [OSTI]

    Enrique Perez-Montero; Angeles I. Diaz

    2003-09-02T23:59:59.000Z

    We present long-slit spectrophotometric observations in the red and near infrared of 12 HII galaxies. The spectral range includes the sulphur lines [SII] at wavelengths 6716, 6731 angstroms and [SIII] at 6312 angstroms and 9069, 9532 angstroms. For all of the observed galaxies, at least three ion-weighted temperatures from forbidden auroral to nebular line ratios have been obtained and the relations between the different line temperatures have been discussed. It is found that, for some objects, the [OII] temperatures derived from those of [OIII] through the use of photo-ionisation models, without taking into account the effect of density, can lead to a significant underestimate of the O+/H+ ionic abundance and hence of the total oxygen abundance.

  16. Empirical diagnostics of HII regions based on sulphur emission lines

    E-Print Network [OSTI]

    E. Perez-Montero; A. I. Diaz

    2002-11-13T23:59:59.000Z

    Spectrophotometry constitutes a unique way to obtain the whole diagnostics (density, temperature, ionic abundances) of ionized gas nebulae, thus providing invaluable information about the objects where they reside. If such nebulae are in the low excitation regime, the diagnostics have to relie on the observation of the more intense emission lines. We have compiled data for a sample of HII regions, GEHR and HII galaxies and compared them with results derived from photoionizacion models whose parameters cover the physical conditions of the nebulae. Our results confirm a lower uncertainty for the diagnostics when using empirical methods based on the strong lines of [SII] and [SIII] replacing and complementing those based on the [OII] and [OIII] lines.

  17. Deriving Particle Distributions from In-Line Fraunhofer Holographic Data

    SciTech Connect (OSTI)

    C.A. Ciarcia; D.E. Johnson; D.S. Sorenson; R.H. Frederickson, A.D. Delanoy; R.M. Malone; T.W. Tunnel

    1997-08-01T23:59:59.000Z

    Holographic data are acquired during hydrodynamic experiments at the Pegasus Pulsed Power Facility at the Los Alamos National Laboratory. These experiments produce a fine spray of fast-moving particles. Snapshots of the spray are captured using in-line Fraunhofer holographic techniques. Roughly one cubic centimeter is recorded by the hologram. Minimum detectable particle size in the data extends down to 2 microns. In a holography reconstruction system, a laser illuminates the hologram as it rests in a three-axis actuator, recreating the snapshot of the experiment. A computer guides the actuators through an orderly sequence programmed by the user. At selected intervals, slices of this volume are captured and digitized with a CCD camera. Intermittent on-line processing of the image data and computer control of the camera functions optimizes statistics of the acquired image data for off-line processing. Tens of thousands of individual data frames (30 to 40 gigabytes of data) are required to recreate a digital representation of the snapshot. Throughput of the reduction system is 550 megabytes per hour (MB/hr). Objects and associated features from the data are subsequently extracted during off-line processing. Discrimination and correlation tests reject noise, eliminate multiple counting of particles, and build an error model to estimate performance. Objects surviving these tests are classified as particles. The particle distributions are derived from the data base formed by these particles, their locations and features. Throughput of the off-line processing exceeds 500 MB/hr. This paper describes the reduction system, outlines the off-line processing procedure, summarizes the discrimination and correlation tests, and reports numerical results for a sample data set.

  18. On The Nature of Low Luminosity Narrow Line AGN

    E-Print Network [OSTI]

    Ari Laor

    2003-02-26T23:59:59.000Z

    There is clear observational evidence that some narrow line (type 2) AGN have a hidden broad line region (BLR), and are thus intrinsically broad line (type 1) AGN. Does this AGN unification applies for all type 2 AGN? Indirect arguments suggest that some "true" type 2 AGN, i.e. AGN having no obscured BLR do exist, but it is not clear why the BLR is missing in these AGN. Here we point out a possible natural explanation. The observed radius-luminosity relation for the BLR implies an increasing line width with decreasing luminosity for a given black hole mass (Mbh). In addition, there appears to be an upper limit to the observed width of broad emission lines in AGN of Delta v_max~25,000 km/s, which may reflect a physical limit above which the BLR may not be able to survive. Thus, at a low enough luminosity the BLR radius shrinks below the Delta v_max radius, leaving no region where the BLR can exist, although the AGN may remain otherwise `normal'. The implied minimum bolometric luminosity required to sustain a BLR with Delta v<25,000 km/s is L_min~10^{41.8}(Mbh}/10^8M_sun)^2. All AGN with Lline AGN without a hidden BLR. Predictions for the true nature of low luminosity AGN in two samples of nearby galaxies are provided. These can be used to test the above L_min conjecture, and the predictions of other models for the size and origin of the BLR.

  19. Characterization Plan for Soils Around Drain Line PLA-100115

    SciTech Connect (OSTI)

    D. Shanklin

    2006-05-24T23:59:59.000Z

    This Characterization Plan supports the Hazardous Waste Management Act/Resource Conservation and Recovery Act (HWMA/RCRA) closure of soils that may have been contaminated by releases from drain line PLA-100115, located within the Idaho Nuclear Technology and Engineering Center at the Idaho National Laboratory Site. The requirements to address the closure of soils contaminated by a potential release from this line in a characterization plan was identified in the "HWMA/RCRA Less Than 90-day Generator Closure Report for the VES-SFE-126."

  20. Low energy beam line at the AGOR facility

    SciTech Connect (OSTI)

    Toprek, Dragan; Formanoy, Iwo; Brandenburg, Sytze [VINCA Institute of Nuclear Sciences, Laboratory for Nuclear and Plasma Physics, B.O. Box 522, 11001 Belgrade (Serbia and Montenegro); Kernfysisch Versneller Instituut (KVI), Zernikelaan 25, 9747 AA, Groningen (Netherlands)

    2005-01-01T23:59:59.000Z

    The origin of the low transmission through the low energy beam line between the electron cyclotron resonance source and the AGOR cyclotron has been investigated. Measurements of beam size and emittance, determined with the ''varying quadrupole method,'' are compared with calculations including fringe fields up to third order with the code COSY INFINITY. Calculations and measurements qualitatively agree; the calculations exhibit the large beam losses observed. On the basis of the calculations new settings have been determined, resulting in a significant increase of the transmission. To achieve full transmission a complete redesign of the beam line, in particular of the bending magnets, is needed.

  1. AGS to RHIC transfer line: Design and commissioning

    SciTech Connect (OSTI)

    MacKay, W.W; Ahrens, L.; Bennan, M.; Brown, K. [and others

    1996-09-01T23:59:59.000Z

    In the fall of 1995, we successfully completed a major milestone in the RHIC (Relativistic Heavy Ion Collider) project: the first beam test of the AGS (Alternating Gradient Synchrotron) to RHIC (ATR) transfer line. The ATR serves as a test bed for the new RHIC control system. This transfer line is highly instrumented, with several types of instrumentation for characterizing the extracted beam from AGS and for matching the beam into RHIC. We describe the design and performance of ATR with gold ions with an eye to reaching the design criteria for RHIC operation, both in beam quality and controls.

  2. Evaluation of Instrumentation and Dynamic Thermal Ratings for Overhead Lines

    SciTech Connect (OSTI)

    Phillips, A.

    2013-01-31T23:59:59.000Z

    In 2010, a project was initiated through a partnership between the Department of Energy (DOE) and the New York Power Authority (NYPA) to evaluate EPRI?s rating technology and instrumentation that can be used to monitor the thermal states of transmission lines and provide the required real-time data for real-time rating calculations. The project included the installation and maintenance of various instruments at three 230 kV line sites in northern New York. The instruments were monitored, and data collection and rating calculations were performed for about a three year period.

  3. Dynamic Line Rating Oncor Electric Delivery Smart Grid Program

    SciTech Connect (OSTI)

    Johnson, Justin; Smith, Cale; Young, Mike; Donohoo, Ken; Owen, Ross; Clark, Eddit; Espejo, Raul; Aivaliotis, Sandy; Stelmak, Ron; Mohr, Ron; Barba, Cristian; Gonzalez, Guillermo; Malkin, Stuart; Dimitrova, Vessela; Ragsdale, Gary; Mitchem, Sean; Jeirath, Nakul; Loomis, Joe; Trevino, Gerardo; Syracuse, Steve; Hurst, Neil; Mereness, Matt; Johnson, Chad; Bivens, Carrie

    2013-05-04T23:59:59.000Z

    Electric transmission lines are the lifeline of the electric utility industry, delivering its product from source to consumer. This critical infrastructure is often constrained such that there is inadequate capacity on existing transmission lines to efficiently deliver the power to meet demand in certain areas or to transport energy from high-generation areas to high-consumption regions. When this happens, the cost of the energy rises; more costly sources of power are used to meet the demand or the system operates less reliably. These economic impacts are known as congestion, and they can amount to substantial dollars for any time frame of reference: hour, day or year. There are several solutions to the transmission constraint problem, including: construction of new generation, construction of new transmission facilities, rebuilding and reconductoring of existing transmission assets, and Dynamic Line Rating (DLR). All of these options except DLR are capital intensive, have long lead times and often experience strong public and regulatory opposition. The Smart Grid Demonstration Program (SGDP) project co-funded by the Department of Energy (DOE) and Oncor Electric Delivery Company developed and deployed the most extensive and advanced DLR installation to demonstrate that DLR technology is capable of resolving many transmission capacity constraint problems with a system that is reliable, safe and very cost competitive. The SGDP DLR deployment is the first application of DLR technology to feed transmission line real-time dynamic ratings directly into the system operations State Estimator and load dispatch program, which optimizes the matching of generation with load demand on a security, reliability and economic basis. The integrated Dynamic Line Rating (iDLR)1 collects transmission line parameters at remote locations on the lines, calculates the real-time line rating based on the equivalent conductor temperature, ambient temperature and influence of wind and solar radiation on the stringing section, transmits the data to the Transmission Energy Management System, validates its integrity and passes it on to Oncor and ERCOT (Electric Reliability Council of Texas) respective system operations. The iDLR system is automatic and transparent to ERCOT System Operations, i.e., it operates in parallel with all other system status telemetry collected through Supervisory Control and Data Acquisition (SCADA) employed across the company.

  4. Determination of age in forensic dentistry from cemental incremental lines

    E-Print Network [OSTI]

    Sousa, Eliane Marques Duarte de

    1987-01-01T23:59:59.000Z

    DETERMINATION OF AGE IN FORENSIC DENTISTRY FROM CEMENTAL INCREMENTAL LINES Thes' s by ELIANE MARJUES DLARTE DF SOUSA Submitted to the Graduate College of Texas A?M Univer ity ' n r. srt' al f"lf' llment of the requirements for the degree... of MASTEP OF S IENCE December 1987 Major Subject: Veterinary Anatomy DETERMINATION OF AGE IN FORENSIC DENTISTRy FROM CEMENTAL INCREMENTAL LINES A Thesis by ELIANE MARQUES DUARTE DE SOUSA Approved as to style and content by: eorge G. Stott (Chairman...

  5. Effective dislocation lines in continuously dislocated crystals. III. Kinematics

    E-Print Network [OSTI]

    Andrzej Trzesowski

    2008-07-16T23:59:59.000Z

    A class of congruences of principal Volterra-type effective dislocation lines associated with a dislocation density tensor is distinguished in order to investigate the kinematics of continuized defective crystals in terms of their dislocation densities (tensorial as well as scalar). Moreover, it shown, basing oneself on a formula defining the mean curvature of glide surfaces for principal edge effective dislocation lines, that the considered kinematics of continuized defective crystals is consistent with some relations appearing in the physical theory of plasticity (e.g. with the Orowan-type kinematic relations and with the treatment of shear stresses as driving stresses of moving dislocations).

  6. Direct mass measurements beyond the proton drip-line

    E-Print Network [OSTI]

    C. Rauth; D. Ackermann; K. Blaum; M. Block; A. Chaudhuri; S. Eliseev; R. Ferrer; D. Habs; F. Herfurth; F. P. Hessberger; S. Hofmann; H. -J. Kluge; G. Maero; A. Martin; G. Marx; M. Mukherjee; J. B. Neumayr; W. R. Plass; W. Quint; S. Rahaman; D. Rodriguez; C. Scheidenberger; L. Schweikhard; P. G. Thirolf; G. Vorobjev; C. Weber; Z. Di

    2007-01-22T23:59:59.000Z

    First on-line mass measurements were performed at the SHIPTRAP Penning trap mass spectrometer. The masses of 18 neutron-deficient isotopes in the terbium-to-thulium region produced in fusion-evaporation reactions were determined with relative uncertainties of about $7\\cdot 10^{-8}$, nine of them for the first time. Four nuclides ($^{144, 145}$Ho and $^{147, 148}$Tm) were found to be proton-unbound. The implication of the results on the location of the proton drip-line is discussed by analyzing the one-proton separation energies.

  7. Precoded Turbo Equalizer for Power Line Communication Systems

    E-Print Network [OSTI]

    Xie, Kai; Li,

    2010-01-01T23:59:59.000Z

    Power line communication continues to draw increasing interest by promising a wide range of applications including cost-free last-mile communication solution. However, signal transmitted through the power lines deteriorates badly due to the presence of severe inter-symbol interference (ISI) and harsh random pulse noise. This work proposes a new precoded turbo equalization scheme specifically designed for the PLC channels. By introducing useful precoding to reshape ISI, optimizing maximum {\\it a posteriori} (MAP) detection to address the non-Gaussian pulse noise, and performing soft iterative decision refinement, the new equalizer demonstrates a gain significantly better than the existing turbo equalizers.

  8. Self-monitoring high voltage transmission line suspension insulator

    DOE Patents [OSTI]

    Stemler, Gary E. (Vancouver, WA); Scott, Donald N. (Vancouver, WA)

    1981-01-01T23:59:59.000Z

    A high voltage transmission line suspension insulator (18 or 22) which monitors its own dielectric integrity. A dielectric rod (10) has one larger diameter end fitting attachable to a transmission line and another larger diameter end fitting attachable to a support tower. The rod is enclosed in a dielectric tube (14) which is hermetically sealed to the rod's end fittings such that a liquidtight space (20) is formed between the rod and the tube. A pressurized dielectric liquid is placed within that space. A discoloring dye placed within this space is used to detect the loss of the pressurized liquid.

  9. Transmission line design manual. A guide for the investigation, development, and design of power transmission lines. Water resources technical pub

    SciTech Connect (OSTI)

    Farr, H.H.

    1980-01-01T23:59:59.000Z

    The purpose of the manual is to outline the various requirements for, and the procedures to be followed in the design of power transmission lines by the Bureau of Reclamation. U.S. Department of the Interior. Numerous design studies, which have been made on specific aspects of transmission line design, are included with explanations of their applications. Information is presented concerning such aspects as selection of type of construction, conductor sags and tensions, insulation, lightning protection, clearance patterns, galloping conductors, structure limitation and guying charts, and structure spotting. Structure design examples are limited to wood-pole construction. Interpretations of the National Electrical Safety Code and other codes are made as required.

  10. Observation of O++++ 4 lines in proton aurora over Svalbard

    E-Print Network [OSTI]

    Lummerzheim, Dirk

    Observation of O++++ 4 P-4 D0 lines in proton aurora over Svalbard N. Ivchenko,1,2 M. Galand,3 B. S March 2004; accepted 26 March 2004; published 29 May 2004. [1] Spectra of a proton aurora event show electron aurora. Conjugate satellite particle measurements are used as input to electron and proton

  11. CRITICAL FLUCTUATIONS. ANOMALOUS LINE SHAPES OF Fe3+ -MOSSBAUER SPECTRA

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    CRITICAL FLUCTUATIONS. ANOMALOUS LINE SHAPES OF Fe3+ -MOSSBAUER SPECTRA IN MAGNETICALLY ORDERED Mossbauer ont montre qu'un recuit incomplet des solutions solides CrzO3-Fez03 et A12 0 3-Fez03 donnelieu203-Fe203pures ou dopeespar Fe2+donnent lieu uneespkceentierementnouvelle de spectres Mossbauer

  12. MOVING CONTACT LINES IN THE CAHN-HILLIARD PIERRE SEPPECHER

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    of the flow in the immediate vicinity of the contact line shows the connection between the static contact, the shape of the interface of a drop lying on a smooth horizontal surface depends on gravity and surface, they are responsible for the rising of a fluid in a capillary tube. When the interface is moving with respect

  13. Sacrificial Charge and Charge Injection! Evolution of Line Width!

    E-Print Network [OSTI]

    Grant, Catherine E.

    MeV). Anti-correlated with the solar cycle. Similar structures are seen in the energy scale due background" which depends on solar cycle and activity." XIS energy scale and line width as a function of cut increasing CTI, trailing charge and event/split thresholds Evolution of Energy Scale! Radiation damage

  14. A Laser-Wire System at the ATF Extraction Line

    SciTech Connect (OSTI)

    Boogert, S.T.; Blair, G.; Boorman, G.; Bosco, A.; Deacon, L.; Driouichi, C.; Karataev, P.; /Royal Holloway, U. of London; Kamps, T.; /BESSY, Berlin; Delerue, N.; Dixit, S.; Foster, B.; Gannaway, F.; Howell, D.F.; Qureshi, M.; Reichold, A.; Senanayake, R.; /Oxford U.; Aryshev, A.; Hayano, H.; Kubo, K.; Terunuma, N.; Urakawa, J.; /KEK, Tsukuba /Liverpool

    2007-02-12T23:59:59.000Z

    A new laser-wire (LW) system has been installed at the ATF extraction line at KEK, Tsukuba. The system aims at a micron-scale laser spot size and employs a mode-locked laser system. The purpose-built interaction chamber, light delivery optics, and lens systems are described, and the first results are presented.

  15. Kalman filtering algorithm for on-line memory polynomial predistortion

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Kalman filtering algorithm for on-line memory polynomial predistortion Mourad Djamai 1 , Smail. Kalman filtering algorithm with sliding time-window is adapted to track the changes in the PA predistortion, Kalman Filtering, parameter estimation, adaptive control. I. INTRODUCTION Nonlinear system

  16. Software Product Line Engineering for Long-lived, Sustainable Systems

    E-Print Network [OSTI]

    Lutz, Robyn R.

    Software Product Line Engineering for Long-lived, Sustainable Systems Robyn Lutz1,2, David Weiss1 system, long-lived system, variability, commonality/variability analysis. 1 Introduction Sustainable and requirements, distinguishes sustainable systems from legacy systems. Accordingly we use the term long-lived

  17. Controlled Tripping of Overheated Lines Mitigates Power Outages

    E-Print Network [OSTI]

    Pfitzner, Ren; Chertkov, Michael

    2011-01-01T23:59:59.000Z

    We study cascades of blackouts in the model of the Polish (transmission) power grid (2700 nodes and 3504 transmission lines). A cascade is initiated by a sufficiently severe initial contingency tripping. The cascade advances via sequential tripping of many more overheated lines (with the thermal limits exceeded), islanding loads and generators and eventually arriving at a fixed point with the surviving part of the system being power- flow-balanced and the rest of the system being outaged. Utilizing the quasi-static model for cascade propagation, introduced in our earlier study (Statistical Classification of Cascading Failures in Power Grids, IEEE PES GM 2011), we analyze how the severity of the cascade depends on the order of tripping overheated lines. Our main observation is that the order of tripping has a tremendous effect on the size of the resulting outage: the probability distribution function of the outage size is broad; moreover in many of the cases studied, picking an overheated line at random result...

  18. Multipole corrections to perihelion and node line precession

    E-Print Network [OSTI]

    L. Fernndez-Jambrina

    2009-06-10T23:59:59.000Z

    In this talk relativistic corrections due to Geroch-Hansen multipoles for perihelion precession and node line precession of orbits in a stationary axially symmetric vacuum spacetime endowed with a plane of symmetry will be shown. Patterns of regularity will be discussed.

  19. Managing a Software Ecosystem Using a Multiple Software Product Line

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Managing a Software Ecosystem Using a Multiple Software Product Line: a Case Study on Digital increases the number of software ecosystems: software platforms developed and maintained in a decentralized YourCast from a single system to a medium- scale ecosystem, we show how organizing it as a multiple

  20. Wilson lines and gauge invariant off-shell amplitudes

    E-Print Network [OSTI]

    Piotr Kotko

    2014-04-24T23:59:59.000Z

    We study matrix elements of Fourier-transformed straight infinite Wilson lines as a way to calculate gauge invariant tree-level amplitudes with off-shell gluons. The off-shell gluons are assigned "polarization vectors" which (in the Feynman gauge) are transverse to their off-shell momenta and define the direction of the corresponding Wilson line operators. The infinite Wilson lines are first regularized to prove the correctness of the method. We have implemented the method in a computer FORM program that can calculate gluonic matrix elements of Wilson line operators automatically. In addition we formulate the Feynman rules that are convenient in certain applications, e.g. proving the Ward identities. Using both the program and the Feynman rules we calculate a few examples, in particular the matrix elements corresponding to gauge invariant $g^{*}g^{*}g^{*}g$ and $g^{*}g^{*}g^{*}g^{*}g$ processes. An immediate application of the approach is in the high energy scattering, as in a special kinematic setup our results reduce to the form directly related to Lipatov's vertices. Thus the results we present can be directly transformed into Lipatov's vertices, in particular into $RRRP$ and $RRRRP$ vertices with arbitrary "orientation" of reggeized gluons. Since the formulation itself is not restricted to high-energy scattering, we also apply the method to a decomposition of an ordinary on-shell amplitude into a set of gauge invariant objects.

  1. Elemental Abundances from Intrinsic QSO Emission and Absorption Lines

    E-Print Network [OSTI]

    F. Hamann

    1998-06-06T23:59:59.000Z

    Several studies have shown that the column densities inferred from broad absorption lines (BALs) require extremely high metallicities and phosphorus overabundances -- apparently in conflict with other abundance diagnostics. Here I use HST spectroscopy of the BALQSO PG 1254+047 to argue that the BALs abundance estimates are incorrect, because partial line-of-sight coverage of the continuum source(s) has led to gross underestimates of the line optical depths and column densities. I claim that the significant presence of PV 1118,1128 absorption in this and other BALQSOs identifies the saturated absorption-line spectrum. This interpretation implies that the total column densities are at least ten times larger than previous estimates, namely log N_H(cm-2) > 22. The outflowing BAL gas, at velocities from -15,000 to -27,000 km/s in PG 1254+047, is therefore a strong candidate for the X-ray absorber in BALQSOs. If this high-column density outflow is radiately accelerated, it must originate <0.1 pc from the QSO.

  2. ACADEMIC INTEGRITY LIST OF ON-LINE RESOURCES

    E-Print Network [OSTI]

    Mease, Kenneth D.

    ACADEMIC INTEGRITY LIST OF ON-LINE RESOURCES Indiana University: How to Recognize Plagiarism http-making flowchart, and examples, as well as a 5-minute quiz on plagiarism. Georgetown University: What, with many real-life examples of situations that students face. American University: Academic Integrity http://www.american.edu/academics/integrity

  3. Optical recombination lines as probes of conditions in planetary nebulae

    E-Print Network [OSTI]

    X. -W. Liu

    2006-05-03T23:59:59.000Z

    Since the last IAU symposium on planetary nebulae (PNe), several deep spectroscopic surveys of the relatively faint optical recombination lines (ORLs) emitted by heavy element ions in PNe and H II regions have been completed. New diagnostic tools have been developed thanks to progress in the calculations of basic atomic data. Together, they have led to a better understanding of the physical conditions under which the various types of emission lines arise. The studies have strengthened the previous conjecture that nebulae contain another component of cold, high metallicity gas, which is too cool to excite any significant optical or UV CELs and is thus invisible via such lines. The existence of such a plasma component in PNe and possibly also in H II regions provides a natural solution to the long-standing problem in nebular astrophysics, i.e. the dichotomy of nebular plasma diagnostics and abundance determinations using ORLs and continua on the one hand and collisionally excited lines (CELs) on the other.

  4. GLIDES PROJECT GuideLines Into DEcision Support

    E-Print Network [OSTI]

    Lee, Daeyeol

    GLIDES PROJECT GuideLines Into DEcision Support sponsored by The Agency for Healthcare Research;Topics · GLIDES 4-level "stack" ­ NarraAve guideline with quality, implementabilityLon, and local coding/linking ­ To Formal Quality Measure via QDM, eMeasure · BRIDGE

  5. 241-AY-102 Leak Detection Pit Drain Line Inspection Report

    SciTech Connect (OSTI)

    Boomer, Kayle D. [Washington River Protection Solutions, LLC (United States); Engeman, Jason K. [Washington River Protection Solutions, LLC (United States); Gunter, Jason R. [Washington River Protection Solutions, LLC (United States); Joslyn, Cameron C. [Washington River Protection Solutions, LLC (United States); Vazquez, Brandon J. [Washington River Protection Solutions, LLC (United States); Venetz, Theodore J. [Washington River Protection Solutions, LLC (United States); Garfield, John S. [AEM Consulting (United States)

    2014-01-20T23:59:59.000Z

    This document provides a description of the design components, operational approach, and results from the Tank AY-102 leak detection pit drain piping visual inspection. To perform this inspection a custom robotic crawler with a deployment device was designed, built, and operated by IHI Southwest Technologies, Inc. for WRPS to inspect the 6-inch leak detection pit drain line.

  6. Magnetic field-line lengths inside interplanetary magnetic flux ropes

    E-Print Network [OSTI]

    Hu, Qiang; Krucker, Sam

    2015-01-01T23:59:59.000Z

    We report on the detailed and systematic study of field-line twist and length distributions within magnetic flux ropes embedded in Interplanetary Coronal Mass Ejections (ICMEs). The Grad-Shafranov reconstruction method is utilized together with a constant-twist nonlinear force-free (Gold-Hoyle) flux rope model to reveal the close relation between the field-line twist and length in cylindrical flux ropes, based on in-situ Wind spacecraft measurements. We show that the field-line twist distributions within interplanetary flux ropes are inconsistent with the Lundquist model. In particular we utilize the unique measurements of magnetic field-line lengths within selected ICME events as provided by Kahler et al. (2011) based on energetic electron burst observations at 1 AU and the associated type III radio emissions detected by the Wind spacecraft. These direct measurements are compared with our model calculations to help assess the flux-rope interpretation of the embedded magnetic structures. By using the differen...

  7. EA-1960: Townsite Solar Project Transmission Line, Clark County, Nevada

    Broader source: Energy.gov [DOE]

    The Bureau of Land Management, with Western Area Power Administration as a cooperating agency, prepared an EA to evaluate potential impacts of a proposal to build and operate a 180-MW photovoltaic facility; a 220, 230, or 500 kV transmission line; and associated facilities in Clark County, Nevada.

  8. Real Time Pricing Tie Line Control: A Case Study

    E-Print Network [OSTI]

    Childress, R.

    expensive than the price offered by the utility. Conversely, when the price to buy energy is less expensive than it is to produce it, a facility may choose to back off on self-generation and buy more energy. One such Advanced Tie Line Control system...

  9. Predictive Line Buffer: A fast, Energy Efficient Cache Architecture

    E-Print Network [OSTI]

    Aboelaze, Mokhtar

    . In this paper, we propose a new cache architecture that results in a faster memory access and lower energy memory access time, and energy consuption. In this paper, we propose a new cache architecturePredictive Line Buffer: A fast, Energy Efficient Cache Architecture Kashif Ali MoKhtar Aboelaze

  10. Retirement Planning TimeLine MPSERS Retirement Plan Participant

    E-Print Network [OSTI]

    early in your career! Your MPSERS retirement pension is based on your best 3 years (MIP plan) or 5 years- it is never too early to plan for your retirement! Know what plan you are in - MIP or Basic. Review your1 Retirement Planning TimeLine MPSERS Retirement Plan Participant Retirement planning is essential

  11. Trees and Power Lines: Minimizing Conflicts between Electric Power

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Trees and Power Lines: Minimizing Conflicts between Electric Power Infrastructure and the Urban: Minimizing Conflicts between Electric Power Infrastructure and the Urban Forest ISSUE BRIEF | March 2012 1: Minimizing Conflicts between Electric Power Infrastructure and the Urban Forest 1 Trees and overhead power

  12. GEOSYNTHETIC DAM LINING SYSTEMS By: Christine T. Weber1

    E-Print Network [OSTI]

    Zornberg, Jorge G.

    GEOSYNTHETIC DAM LINING SYSTEMS By: Christine T. Weber1 and Jorge Zornberg, Advisor Abstract: The overall goal of this project is to contribute towards the use of geosynthetics in the design of dams geomembrane and composite liners under conditions representative of dams. There has been previous work done

  13. STRATEGIC LINES 2013-2015 POMPEU FABRA UNIVERSITY

    E-Print Network [OSTI]

    STRATEGIC LINES 2013-2015 POMPEU FABRA UNIVERSITY SUMMARY: I. UPF's Image 2 II. Teaching 4 III. Science and Teaching Staff Policy 6 IV. Government and Management 9 #12;2 I. UPF's Image UPF must and recognition within society UPF should participate more clearly and actively in discussions about current

  14. Safety and Health Regulatory and Policy Response Line- General Information

    Broader source: Energy.gov [DOE]

    The DOE Worker Safety and Health Standards Response Line, established in 1992, is a service that responds to questions DOE, DOE contractor, and DOE subcontractor personnel regarding DOE-adopted and -prescribed standards and directives. These responses may not represent official OSHA policies.

  15. Computing Criticality of Lines in Power Systems Computational Research Div.

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    Computing Criticality of Lines in Power Systems Ali Pinar Computational Research Div. Lawrence. Planning and operating criteria are designed so that "the interconnected power system shall be operated a vulnerability in the a power system is im- portant, however, system robustness requires identifying all

  16. Volume painting: incorporating volumetric rendering with line integral convolution (LIC)

    E-Print Network [OSTI]

    Lee, Jaewook

    2005-11-01T23:59:59.000Z

    (NPR) . . . . . . . . . . . . . 5 II.2. Volume Rendering . . . . . . . . . . . . . . . . . . . . . . . 5 II.3. Line Integral Convolution (LIC) . . . . . . . . . . . . . . . . 6 III METHODOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . 8 III.1... INTRODUCTION In this thesis, we introduce a new Non-Photorealistic Rendering (NPR) technique, called Volume Painting. An example of Volume Painting is shown in Figure 1. Fig. 1. Volume Painting of the Implicit Geometry. During the last decade, NPR has become...

  17. Space and Movable Equipment On-line Inventory

    E-Print Network [OSTI]

    Hayden, Nancy J.

    Space and Movable Equipment On-line Inventory FY14 (July 2013 - June 2014) CAS Cost Accounting and Michael Richards #12;Learning Objectives Gain understanding of the Importance of Space & Equipment Inventory. Understand the entire Inventory Process. How to classify functional space. How to inventory

  18. Stellar Surface Convection, Line Asymmetries, and Wavelength Shifts

    E-Print Network [OSTI]

    , Box 43, SE22100 Lund, Sweden Abstract. Wavelength positions of photospheric absorption lines may the sinking and cooler (darker) gas. For the Sun, the effect is around 300 m s \\Gamma1 , expected to increase), and intergranular lanes with local redshifts (sinking motion), as naturally expected in convective energy transfer

  19. Waveform Relaxation Technique for Longitudinal Partitioning of Transmission Lines

    E-Print Network [OSTI]

    Gander, Martin J.

    for VLSI circuit analysis in [1], and has been extended to time dependent Partial Differential Equations approach yields a remarkable linear increase in run time with respect to the number of lines. For some problems with more complex circuit topologies, additional splittings are desirable besides the transverse

  20. New protection method for HVDC lines including cables

    SciTech Connect (OSTI)

    Takeda, H.; Ayakawa, H.; Tsumenaga, N.; Sanpei, M.

    1995-10-01T23:59:59.000Z

    For the third project of the Hokkaido-Honshu HVDC Link in Japan, called the HVDC Link III project (rated at 250 kVdc-1,200 A-300 MW), the authors developed an HVDC transmission line protection method based on a new working principle that allows high-speed and highly sensitive detection of faults, enhancing reliability in the supply of electric power. In general, increasing the sensitivity of relays will lead to an increased likelihood of undesired operation whereas lowering the sensitivity will impair the responsiveness of the relays. The proposed method meets these apparently incompatible requirements very well. Basically classified as a differential scheme, the HVDC transmission line protection method compensates for a charging and discharging current that flows through the line-to-ground capacitance at times of voltage variations caused by a line fault or by the operation of dc power systems. The developed protection method is also characterized in that it uses current changes induced by voltage variations to restrain the operation of a relay. This configuration has made the proposed method far superior in responsiveness and sensitivity to the conventional protection method. A simulation using an EMTP (Electro-Magnetic Transients Program) was conducted on this method. Developed relay equipment embodying the new protection method was subjected to various verification tests, where this equipment was connected to a power system simulator, before being delivered to the HVDC Link III facility.

  1. EIS-0124: Conrad-Shelby Transmission Line Project, Montana

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy's Western Area Power Administration developed this statement to assess the environmental impact of adding a 230 kV transmission line between Conrad and Shelby, Montana and a new substation near Shelby to update the stressed electrical transmission system.

  2. EIS-0090: Fort Peck-Havre Transmission Line Project, Montana

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energys Western Area Power Administration prepared this statement to assess the potential environmental and socioeconomic implications of its proposed action to construct and operate a 230kV transmission line from Fort Peck to Havre, Montana, with three intermediate interconnecting substations.

  3. Free Vibrations of Coupled Spans of Overhead Transmission Lines

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    be interesting for galloping control. 1 Introduction Overhead transmission lines for transport of high, and maintained by cross wind. This aeroelastic instability is known as galloping [1, 2, 3, 4, 5]. For high enough amplitudes neighbouring conductors may touch each other and cause short circuit and structural

  4. QER- Comment of Clean Line Energy Partners LLC

    Broader source: Energy.gov [DOE]

    Hello, Clean Line Energy Partners would like to submit the attached written comments to the QER task force, in conjunction with the verbal comments Jimmy Glotfelty provided today in Newark. Thank you for your consideration, and please let us know if you would like any additional information. Sincerely, Diana Rivera

  5. A Power Line Communication Network Infrastructure for The Smart Home

    E-Print Network [OSTI]

    Latchman, Haniph A.

    A Power Line Communication Network Infrastructure for The Smart Home Yu-Ju Lin, Haniph A. Latchman's as a basic infrastructure for building integrated "smart homes," wherein infor- mation appliances (IA guarantee QoS for real-time communications, supporting delay sensitive data streams for "Smart Home

  6. Visualization of groundwater flow using line integral convolution

    E-Print Network [OSTI]

    Andrzejak, Artur

    for the simulation of groundwater flow and transport models. INTRODUCTION Nowadays, 3D numerical simulationsVisualization of groundwater flow using line integral convolution J?RG GOTTHARDT & CAROLA BL?MER of groundwater flow and transport problems become more and more common. At the same time the need for adequate

  7. absorption line survey: Topics by E-print Network

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

    absorption line survey 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 A survey for redshifted...

  8. absorption line indices: Topics by E-print Network

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

    absorption line indices 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 Dust Sensitivity of...

  9. absorption line qsos: Topics by E-print Network

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

    absorption line qsos 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 Polarization properties of broad...

  10. absorption line key: Topics by E-print Network

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

    absorption line key 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 The Hubble Space Telescope Quasar...

  11. absorption line strength: Topics by E-print Network

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

    absorption line strength 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 Oscillator Strength...

  12. absorption line spectroscopy: Topics by E-print Network

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

    absorption line spectroscopy 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 Fabry-Perot...

  13. atomic absorption lines: Topics by E-print Network

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

    absorption lines 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 A survey for redshifted molecular and...

  14. Characterization of Co-planar Silicon Transmission Lines with and without Slow-waveEffect

    E-Print Network [OSTI]

    Swaminathan, Madhavan

    Characterization of Co-planar Silicon Transmission Lines with and without Slow-waveEffect Woopoung and package transmission lines has been explained showing that the slow-wave mode cannot be represented only][2][3][4], characterization methods for package transmission lines have been applied to silicon transmission lines under

  15. TLSync: Support for Multiple Fast Barriers Using On-Chip Transmission Lines

    E-Print Network [OSTI]

    Prvulovic, Milos

    TLSync: Support for Multiple Fast Barriers Using On-Chip Transmission Lines Jungju Oh jungju in a transmission-line broadcast network, thus leaving the transmission line network free for non-modulated (base--Interconnection architectures General Terms Design, Performance Keywords Multi-core, Synchronization, Barrier, Transmission Line

  16. A Study on Crosstalk Analysis in Aggregative Transmission Lines with Turning Vias Tapobrata Bandyopadhyay1

    E-Print Network [OSTI]

    Swaminathan, Madhavan

    A Study on Crosstalk Analysis in Aggregative Transmission Lines with Turning Vias Tapobrata and signal integrity in high-speed signal channels is extremely important. Transmission lines and vias transmission lines (4 mil width) of different lengths arranged in bundles. The eight transmission line bundles

  17. An Inverse Problem for Toeplitz Matrices and the Synthesis of Discrete Transmission Lines

    E-Print Network [OSTI]

    Allen, Jont

    An Inverse Problem for Toeplitz Matrices and the Synthesis of Discrete Transmission Lines Russel E and inverse problems for a transmission line which consists of piecewise constant components. Knowing the impulse response of the transmission line, we can calculate the capaci- tance taper of the line, and vice

  18. Calculation of Ramp Response of Lossy Transmission Lines Using Two-port Network Functions

    E-Print Network [OSTI]

    Pedram, Massoud

    1 Calculation of Ramp Response of Lossy Transmission Lines Using Two-port Network Functions Payam-port representation of the transmission line and accounts for the output resistance of the driver and the line response of lossy transmission line which expands the reciprocal of transfer function of the system

  19. PHYSICAL REVIEW B 88, 219904(E) (2013) Erratum: Parametric amplification in Josephson junction embedded transmission lines

    E-Print Network [OSTI]

    Friedland, Lazar

    embedded transmission lines [Phys. Rev. B 87, 144301 (2013)] Oded Yaakobi, Lazar Friedland, Chris Macklin

  20. Optimized Waveform Relaxation Methods for the Longitudinal Partitioning of Transmission Lines

    E-Print Network [OSTI]

    Gander, Martin J.

    1 Optimized Waveform Relaxation Methods for the Longitudinal Partitioning of Transmission Lines convergence. Here we consider transmission line circuits since they represent an important part of a Spice type circuit solver. For transmission lines, the coupling between different lines is relatively weak