Sample records for reliability form oe-417

  1. Electric Disturbance Events (OE-417) | Department of Energy

    Energy Savers [EERE]

    Events (OE-417) Electric Disturbance Events (OE-417) The Electric Emergency Incident and Disturbance Report (Form OE-417) collects information on electric incidents and...

  2. Form OE-417

    U.S. Energy Information Administration (EIA) Indexed Site

    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 IndustriesTownDells, Wisconsin:DeploymentSite Name: Email:Uranium MarketingAdministration|

  3. Form OE-417

    U.S. Energy Information Administration (EIA) Indexed Site

    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 IndustriesTownDells, Wisconsin:DeploymentSite Name: Email:Uranium MarketingAdministration|

  4. Microsoft Word - OE-417_InstrDraft_Nov2011 _2_.doc

    U.S. Energy Information Administration (EIA) Indexed Site

    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 IndustriesTownDells, Wisconsin:DeploymentSite Name:24,High824 2.839 2.835 2.826OE-417,

  5. DOE Issues Agency Information Collection Extension for OE-417 Form in the

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

    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 on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny: Theof"Wave theJulyD&DDepartment of EnergyFederal Register |

  6. Understanding Bulk Power Reliability: The Importance of Good Data and A Critical Review of Existing Sources

    E-Print Network [OSTI]

    Fisher, Emily

    2012-01-01T23:59:59.000Z

    OE-417 Electric Emergency Incident and Disturbance Report”,the Electric Emergency Incident and Disturbance Report (via

  7. DOE Issues Agency Information Collection Extension for OE-417...

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

    and disturbances in the United States (including all 50 states, the District of Columbia, Puerto Rico, U.S. Virgin Islands, and the U.S. Trust Territories) so that the Government...

  8. Electric Disturbance Events (OE-417) | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently20,000 Russian NuclearandJunetrack graphics4DimitriJune 30,NEW! EnergyIndustry BringThe

  9. Agency Information Collection Extension Notice of Public Comment...

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

    of Management and Budget (OMB), Department of Energy Form OE-417, ''Emergency Electric Incident and Disturbance Report.'' Comments regarding this proposed information collection...

  10. Modified Inverse First Order Reliability Method (I-FORM) for Predicting Extreme Sea States.

    SciTech Connect (OSTI)

    Eckert-Gallup, Aubrey Celia; Sallaberry, Cedric Jean-Marie; Dallman, Ann Renee; Neary, Vincent Sinclair

    2014-09-01T23:59:59.000Z

    Environmental contours describing extreme sea states are generated as the input for numerical or physical model simulation s as a part of the stand ard current practice for designing marine structure s to survive extreme sea states. Such environmental contours are characterized by combinations of significant wave height ( ) and energy period ( ) values calculated for a given recurrence interval using a set of data based on hindcast simulations or buoy observations over a sufficient period of record. The use of the inverse first - order reliability method (IFORM) i s standard design practice for generating environmental contours. In this paper, the traditional appli cation of the IFORM to generating environmental contours representing extreme sea states is described in detail and its merits and drawbacks are assessed. The application of additional methods for analyzing sea state data including the use of principal component analysis (PCA) to create an uncorrelated representation of the data under consideration is proposed. A reexamination of the components of the IFORM application to the problem at hand including the use of new distribution fitting techniques are shown to contribute to the development of more accurate a nd reasonable representations of extreme sea states for use in survivability analysis for marine struc tures. Keywords: In verse FORM, Principal Component Analysis , Environmental Contours, Extreme Sea State Characteri zation, Wave Energy Converters

  11. Notice and Request for OMB Review and Comment: Federal Register...

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

    a three-year extension of its Department of Energy Form OE-417, "Emergency Electric Incident and Disturbance Report," OMB Control Number 1901-0288. The proposed collection will...

  12. Forms

    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 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeechesHall ATours, ProgramsFIRSTClean EnergyForms and

  13. Forms

    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 Power AdministrationField8,Dist.New MexicoFinancingProofWorkingEnergyGoForestFormationFormer Forms

  14. North American Electric Reliability Corporation (NERC): Reliability...

    Office of Environmental Management (EM)

    (NERC): Reliability Considerations from the Integration of Smart Grid North American Electric Reliability Corporation (NERC): Reliability Considerations from the Integration of...

  15. Electricity Reliability

    E-Print Network [OSTI]

    electric power equipment with more energy efficiency and higher capacity than today's systems of modernizing the electric grid to meet the nations's need for reliable, electric power, enhancing security continues to increase within the electricity infrastructure. DOE is conducting research, development

  16. Photovoltaic module reliability workshop

    SciTech Connect (OSTI)

    Mrig, L. (ed.)

    1990-01-01T23:59:59.000Z

    The paper and presentations compiled in this volume form the Proceedings of the fourth in a series of Workshops sponsored by Solar Energy Research Institute (SERI/DOE) under the general theme of photovoltaic module reliability during the period 1986--1990. The reliability Photo Voltaic (PV) modules/systems is exceedingly important along with the initial cost and efficiency of modules if the PV technology has to make a major impact in the power generation market, and for it to compete with the conventional electricity producing technologies. The reliability of photovoltaic modules has progressed significantly in the last few years as evidenced by warranties available on commercial modules of as long as 12 years. However, there is still need for substantial research and testing required to improve module field reliability to levels of 30 years or more. Several small groups of researchers are involved in this research, development, and monitoring activity around the world. In the US, PV manufacturers, DOE laboratories, electric utilities and others are engaged in the photovoltaic reliability research and testing. This group of researchers and others interested in this field were brought together under SERI/DOE sponsorship to exchange the technical knowledge and field experience as related to current information in this important field. The papers presented here reflect this effort.

  17. Wind turbine reliability database update.

    SciTech Connect (OSTI)

    Peters, Valerie A.; Hill, Roger Ray; Stinebaugh, Jennifer A.; Veers, Paul S.

    2009-03-01T23:59:59.000Z

    This report documents the status of the Sandia National Laboratories' Wind Plant Reliability Database. Included in this report are updates on the form and contents of the Database, which stems from a fivestep process of data partnerships, data definition and transfer, data formatting and normalization, analysis, and reporting. Selected observations are also reported.

  18. Reliability-Centered Maintenance

    Broader source: Energy.gov [DOE]

    Reliability-centered maintenance leverages the same practices and technologies of predictive maintenance.

  19. Power electronics reliability analysis.

    SciTech Connect (OSTI)

    Smith, Mark A.; Atcitty, Stanley

    2009-12-01T23:59:59.000Z

    This report provides the DOE and industry with a general process for analyzing power electronics reliability. The analysis can help with understanding the main causes of failures, downtime, and cost and how to reduce them. One approach is to collect field maintenance data and use it directly to calculate reliability metrics related to each cause. Another approach is to model the functional structure of the equipment using a fault tree to derive system reliability from component reliability. Analysis of a fictitious device demonstrates the latter process. Optimization can use the resulting baseline model to decide how to improve reliability and/or lower costs. It is recommended that both electric utilities and equipment manufacturers make provisions to collect and share data in order to lay the groundwork for improving reliability into the future. Reliability analysis helps guide reliability improvements in hardware and software technology including condition monitoring and prognostics and health management.

  20. Human Reliability Program Overview

    SciTech Connect (OSTI)

    Bodin, Michael

    2012-09-25T23:59:59.000Z

    This presentation covers the high points of the Human Reliability Program, including certification/decertification, critical positions, due process, organizational structure, program components, personnel security, an overview of the US DOE reliability program, retirees and academia, and security program integration.

  1. Request Form

    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 Scienceand Requirements Recently ApprovedReliability TechnologyRenewalReportReports andRequestForm

  2. Medical Aspects of Reliability

    SciTech Connect (OSTI)

    Atencio, Julian J.

    2014-05-05T23:59:59.000Z

    This presentation covers the medical evaluation as part of a human reliability program, particularly the various medical qualifications and potential disqualifiers.

  3. Lifetime and Reliability

    Broader source: Energy.gov [DOE]

    A DOE Solid-State Lighting Program technology fact sheet on lifetime, reliability, and failure as related to LED-based products.

  4. Stochastic Methods in Reliability and Risk Management This volume focuses on stochastic methods developed for reliability modeling and risk

    E-Print Network [OSTI]

    Li, Haijun

    such as quantitative risk management, decision analysis under uncertainty, and their applications in areas methods developed for reliability modeling and risk analysis. Reliability theory and risk analysis have. This special volume highlights this convergence of reliability modeling and risk analysis, that forms the core

  5. Hawaii electric system reliability.

    SciTech Connect (OSTI)

    Silva Monroy, Cesar Augusto; Loose, Verne William

    2012-09-01T23:59:59.000Z

    This report addresses Hawaii electric system reliability issues; greater emphasis is placed on short-term reliability but resource adequacy is reviewed in reference to electric consumers' views of reliability %E2%80%9Cworth%E2%80%9D and the reserve capacity required to deliver that value. The report begins with a description of the Hawaii electric system to the extent permitted by publicly available data. Electrical engineering literature in the area of electric reliability is researched and briefly reviewed. North American Electric Reliability Corporation standards and measures for generation and transmission are reviewed and identified as to their appropriateness for various portions of the electric grid and for application in Hawaii. Analysis of frequency data supplied by the State of Hawaii Public Utilities Commission is presented together with comparison and contrast of performance of each of the systems for two years, 2010 and 2011. Literature tracing the development of reliability economics is reviewed and referenced. A method is explained for integrating system cost with outage cost to determine the optimal resource adequacy given customers' views of the value contributed by reliable electric supply. The report concludes with findings and recommendations for reliability in the State of Hawaii.

  6. Medical Device Reliability BIOMATERIALS

    E-Print Network [OSTI]

    NEMI Medical Electronics team to address short- and long-term reliability issues with medical devices. OurMedical Device Reliability BIOMATERIALS Our goal is to provide medical device manufacturers, and consistency of active implantable medical devices. These devices, including pacemakers, cardiac defibrillators

  7. Photovoltaic system reliability

    SciTech Connect (OSTI)

    Maish, A.B.; Atcitty, C. [Sandia National Labs., NM (United States); Greenberg, D. [Ascension Technology, Inc., Lincoln Center, MA (United States)] [and others

    1997-10-01T23:59:59.000Z

    This paper discusses the reliability of several photovoltaic projects including SMUD`s PV Pioneer project, various projects monitored by Ascension Technology, and the Colorado Parks project. System times-to-failure range from 1 to 16 years, and maintenance costs range from 1 to 16 cents per kilowatt-hour. Factors contributing to the reliability of these systems are discussed, and practices are recommended that can be applied to future projects. This paper also discusses the methodology used to collect and analyze PV system reliability data.

  8. Reliable solar: powering communities

    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 Scienceand Requirements Recently ApprovedReliability Technology earns award ReliabilityReliable

  9. Reliability and Safety

    Broader source: Energy.gov [DOE]

    DOE solar reliability and safety research and development (R&D) focuses on testing photovoltaic (PV) modules, inverters, and systems for long-term performance, and helping investors, consumers,...

  10. Reliability Standards Owner

    Broader source: Energy.gov [DOE]

    This position is located in the Internal Operations and Asset Management group of Planning and Asset Management (TP). A successful candidate in this position will serve as the Reliability Standards...

  11. Gearbox Reliability Collaborative Update (Presentation)

    SciTech Connect (OSTI)

    Sheng, S.

    2013-10-01T23:59:59.000Z

    This presentation was given at the Sandia Reliability Workshop in August 2013 and provides information on current statistics, a status update, next steps, and other reliability research and development activities related to the Gearbox Reliability Collaborative.

  12. Sandia Energy - PV Systems Reliability

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

    Systems Reliability Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Systems Reliability PV Systems ReliabilityCoryne Tasca2015-05-08T03:40:54+00:00...

  13. ISSAT 2012 KCoverage Reliability Evaluation K-COVERAGE RELIABILITY EVALUATION

    E-Print Network [OSTI]

    Xing, Liudong

    #12;7/20/2012 ISSAT 2012 KCoverage Reliability Evaluation forWSNs 2 Introduction Wireless sensor;7/20/2012 ISSAT 2012 KCoverage Reliability Evaluation forWSNs 7 Model 13 Consider a set of sensor nodes (SN7/20/2012 ISSAT 2012 KCoverage Reliability Evaluation forWSNs 1 K-COVERAGE RELIABILITY EVALUATION

  14. Reliability of Electrical Interconnects (Presentation)

    SciTech Connect (OSTI)

    Devoto, D.

    2014-06-01T23:59:59.000Z

    This presentation discusses the status of NREL's research on the reliability of electrical interconnects.

  15. Empirical Bayes Estimation of Reliability

    E-Print Network [OSTI]

    Pensky, Marianna

    types of equipment relies on statistical inference about char- acteristics of reliabilityEmpirical Bayes Estimation of Reliability Introduction Assessment of the reliability of various such as reliability function, mean lifetime of the devices, or failure rate. Gen- eral techniques of statistical

  16. Power electronics reliability.

    SciTech Connect (OSTI)

    Kaplar, Robert James; Brock, Reinhard C.; Marinella, Matthew; King, Michael Patrick; Stanley, James K.; Smith, Mark A.; Atcitty, Stanley

    2010-10-01T23:59:59.000Z

    The project's goals are: (1) use experiments and modeling to investigate and characterize stress-related failure modes of post-silicon power electronic (PE) devices such as silicon carbide (SiC) and gallium nitride (GaN) switches; and (2) seek opportunities for condition monitoring (CM) and prognostics and health management (PHM) to further enhance the reliability of power electronics devices and equipment. CM - detect anomalies and diagnose problems that require maintenance. PHM - track damage growth, predict time to failure, and manage subsequent maintenance and operations in such a way to optimize overall system utility against cost. The benefits of CM/PHM are: (1) operate power conversion systems in ways that will preclude predicted failures; (2) reduce unscheduled downtime and thereby reduce costs; and (3) pioneering reliability in SiC and GaN.

  17. Human Reliability Program Workshop

    SciTech Connect (OSTI)

    Landers, John; Rogers, Erin; Gerke, Gretchen

    2014-05-18T23:59:59.000Z

    A Human Reliability Program (HRP) is designed to protect national security as well as worker and public safety by continuously evaluating the reliability of those who have access to sensitive materials, facilities, and programs. Some elements of a site HRP include systematic (1) supervisory reviews, (2) medical and psychological assessments, (3) management evaluations, (4) personnel security reviews, and (4) training of HRP staff and critical positions. Over the years of implementing an HRP, the Department of Energy (DOE) has faced various challenges and overcome obstacles. During this 4-day activity, participants will examine programs that mitigate threats to nuclear security and the insider threat to include HRP, Nuclear Security Culture (NSC) Enhancement, and Employee Assistance Programs. The focus will be to develop an understanding of the need for a systematic HRP and to discuss challenges and best practices associated with mitigating the insider threat.

  18. Reliable computation Peter Gacs

    E-Print Network [OSTI]

    Gacs, Peter

    of compressors 28 4.6. Exercises 30 5. The reliable storage problem 32 5.1. Clocked circuits 32 5.2. Storage 34 5.1. Cables 21 4.2. Compressors 23 4.3. Propagating safety 25 4.4. Endgame 26 4.5. The construction.3. Error-correcting codes 35 5.4. Refreshers 39 5.5. Exercises 48 6. Problems 49 7. Historical remarks 51

  19. Testing for PV Reliability (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Bansal, S.

    2014-09-01T23:59:59.000Z

    The DOE SUNSHOT workshop is seeking input from the community about PV reliability and how the DOE might address gaps in understanding. This presentation describes the types of testing that are needed for PV reliability and introduces a discussion to identify gaps in our understanding of PV reliability testing.

  20. Sandia National Laboratories: Inverter Reliability

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

    in Hosted by Sandia National Laboratories and the Electric Power Research Institute (EPRI) Inverter reliability drives project life cycle costs and plant performance. This...

  1. Sandia National Laboratories: Component Reliability

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

    in Hosted by Sandia National Laboratories and the Electric Power Research Institute (EPRI) Inverter reliability drives project life cycle costs and plant performance. This...

  2. 2014 Human Reliability Program Workshop

    Broader source: Energy.gov [DOE]

    Announcing The Human Reliability Program Workshop Sponsored by Office of Security (AU-50), U.S Department of Energy In collaboration with NA, NE, EM and SC

  3. Sandia National Laboratories: PV Reliability

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

    Reliability Sandia Research on PV Arc-Fault Detection Submitted for US Patent On March 4, 2015, in Computational Modeling & Simulation, Energy, Facilities, News, News & Events,...

  4. RELIABILITY OF CAPACITOR CHARGING UNITS

    E-Print Network [OSTI]

    Sprott, Julien Clinton

    experience little change while those using the electronic cutoff would drift due to ageing components and changing parameters. The first few shots using the electronic cutoff were less reliable than subsequentRELIABILITY OF CAPACITOR CHARGING UNITS Clint Sprott July 30, 1965 University of Wisconsin

  5. Reliability Improvement Programs in Steam Distribution and Power Generation Systems

    E-Print Network [OSTI]

    Petto, S.

    RELIABILITY IIIPROVEfWlT PROGRAMS IN STEAM DISTRIBUTION AND POVER GENERATION SYSTEItS Steve Petto Tech/Serv Corporation Blue Bell, PA Abstract This paper will present alternatives to costly corrective maintenance of the steam trap... In the reliability and efficiency of the system. Recent studies have shownt hat more than 40% of all In stalled steam traps and 20% of certain types of valves need some form of corrective action. The majority of all high backpressure problems In condensate return...

  6. Reliability Improvement Programs in Steam Distribution and Power Generation Systems

    E-Print Network [OSTI]

    Atlas, R. D.

    improvements in the reliability and efficiency of the system. Recent studies have shown that more than 40% of all in stalled steam traps and 20% of certain types of valves n~ed ' some form of corrective action. The majority of all high backpressure... problems in condensate return systems are due to poor design criteria in expanding or retrofitting existing return systems. By instituting a maintenance management program,a 95% reliability can be gained with two to four annual maintenance cyc...

  7. Photovoltaic performance and reliability workshop

    SciTech Connect (OSTI)

    Mrig, L. [ed.

    1993-12-01T23:59:59.000Z

    This workshop was the sixth in a series of workshops sponsored by NREL/DOE under the general subject of photovoltaic testing and reliability during the period 1986--1993. PV performance and PV reliability are at least as important as PV cost, if not more. In the US, PV manufacturers, DOE laboratories, electric utilities, and others are engaged in the photovoltaic reliability research and testing. This group of researchers and others interested in the field were brought together to exchange the technical knowledge and field experience as related to current information in this evolving field of PV reliability. The papers presented here reflect this effort since the last workshop held in September, 1992. The topics covered include: cell and module characterization, module and system testing, durability and reliability, system field experience, and standards and codes.

  8. Photovoltaics performance and reliability workshop

    SciTech Connect (OSTI)

    Mrig, L. (ed.) [ed.

    1992-01-01T23:59:59.000Z

    This document consists of papers and viewgraphs compiled from the proceedings of a workshop held in September 1992. This workshop was the fifth in a series sponsored by NREL/DOE under the general subject areas of photovoltaic module testing and reliability. PV manufacturers, DOE laboratories, electric utilities and others exchanged technical knowledge and field experience. The topics of cell and module characterization, module and system performance, materials and module durability/reliability research, solar radiation, and applications are discussed.

  9. Photovoltaics performance and reliability workshop

    SciTech Connect (OSTI)

    Mrig, L. [ed.] [ed.

    1992-11-01T23:59:59.000Z

    This document consists of papers and viewgraphs compiled from the proceedings of a workshop held in September 1992. This workshop was the fifth in a series sponsored by NREL/DOE under the general subject areas of photovoltaic module testing and reliability. PV manufacturers, DOE laboratories, electric utilities and others exchanged technical knowledge and field experience. The topics of cell and module characterization, module and system performance, materials and module durability/reliability research, solar radiation, and applications are discussed.

  10. Robust Design of Reliability Test Plans Using Degradation Measures.

    SciTech Connect (OSTI)

    Lane, Jonathan Wesley; Lane, Jonathan Wesley; Crowder, Stephen V.; Crowder, Stephen V.

    2014-10-01T23:59:59.000Z

    With short production development times, there is an increased need to demonstrate product reliability relatively quickly with minimal testing. In such cases there may be few if any observed failures. Thus, it may be difficult to assess reliability using the traditional reliability test plans that measure only time (or cycles) to failure. For many components, degradation measures will contain important information about performance and reliability. These measures can be used to design a minimal test plan, in terms of number of units placed on test and duration of the test, necessary to demonstrate a reliability goal. Generally, the assumption is made that the error associated with a degradation measure follows a known distribution, usually normal, although in practice cases may arise where that assumption is not valid. In this paper, we examine such degradation measures, both simulated and real, and present non-parametric methods to demonstrate reliability and to develop reliability test plans for the future production of components with this form of degradation.

  11. Constructing Reliable Distributed Communication Systems with CORBA

    E-Print Network [OSTI]

    Schmidt, Douglas C.

    Constructing Reliable Distributed Communication Systems with CORBA Silvano Maffeis Douglas C model to support reliable data- and process- oriented distributed systems that communicate through syn distributed object computing systems with CORBA. First, we examine the question of whether reliable applica

  12. Distributed Reliable Object-Oriented Programming (DROOP)

    E-Print Network [OSTI]

    Guerraoui, Rachid

    Distributed Reliable Object-Oriented Programming (DROOP) P. Eugster November 3, 2003 Abstract with such failures, coining the term Distributed Reliable Object-Oriented Programming (DROOP). 1 SCOOP

  13. Thermoelectric Materials By Design: Mechanical Reliability (Agreement...

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

    By Design: Mechanical Reliability (Agreement 14957) Thermoelectric Materials By Design: Mechanical Reliability (Agreement 14957) Presentation from the U.S. DOE Office of Vehicle...

  14. PEEM Thermal Stress and Reliability (Presentation)

    SciTech Connect (OSTI)

    O'Keefe, M. P.

    2007-11-08T23:59:59.000Z

    Advancing power electronics thermal stress and reliability is a critical factor in power electronics equipment. NREL aims to improve thermal stress and reliability of power electronics technologies.

  15. Distributed Generation Operational Reliability and Availability...

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

    Reliability and Availability Database, Final Report, January 2004 Distributed Generation Operational Reliability and Availability Database, Final Report, January 2004 This final...

  16. Recommendations to Address Power Reliability Concerns Raised...

    Energy Savers [EERE]

    Reliability Concerns Raised as a Result of Pending Environmental Regulations for Electric Generation Stations Recommendations to Address Power Reliability Concerns Raised as a...

  17. Sandia National Laboratories: photovoltaic plant reliability

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

    photovoltaic plant reliability Sandia-Electric Power Research Institute Partnership Publishes Photovoltaic Reliability Report On January 21, 2014, in Energy, Facilities, Grid...

  18. Sandia National Laboratories: national reliability database

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

    national reliability database Third Annual Continuous Reliability Enhancement for Wind (CREW) Database Report Now Available On October 17, 2013, in Energy, News, News & Events,...

  19. Smart Grid Investments Improve Grid Reliability, Resilience,...

    Office of Environmental Management (EM)

    Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014) Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November...

  20. Research Input Form

    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 Scienceand Requirements Recently ApprovedReliabilityPrincipalResearchMakingHighlightsSubmit Form

  1. Ris-R-1235(EN) Reliability Databases

    E-Print Network [OSTI]

    .1 ISO standard: Gas and Oil - Collection of Reliability and Maintenance Data for Equipment 17 5.2 EDF standard for collection of reliability and maintenance data for equipment (also called MCD ­ Mode et Cause judgements on new equipment reliability parameters or using standard values or standard reliability models (e

  2. Assessing Reliability in Energy Supply Systems

    E-Print Network [OSTI]

    McCarthy, Ryan; Ogden, Joan M.; Sperling, Dan

    2008-01-01T23:59:59.000Z

    total of 15 metrics. Pathway reliability General objectives Adequacy Security Functional zones Primary energy supply

  3. Assessing reliability in energy supply systems

    E-Print Network [OSTI]

    McCarthy, Ryan W.; Ogden, Joan M.; Sperling, Daniel

    2007-01-01T23:59:59.000Z

    total of 15 metrics. Pathway reliability General objectives Adequacy Security Functional zones Primary energy supply

  4. The design of a reliable reputation system

    E-Print Network [OSTI]

    Swamynathan, Gayatri; Almeroth, Kevin C.; Zhao, Ben Y.

    2010-01-01T23:59:59.000Z

    reliability by spreading its transactions evenly across all 20 peers in the system (shown by Distribution

  5. Photovoltaic performance and reliability workshop

    SciTech Connect (OSTI)

    Kroposki, B.

    1996-10-01T23:59:59.000Z

    This proceedings is the compilation of papers presented at the ninth PV Performance and Reliability Workshop held at the Sheraton Denver West Hotel on September 4--6, 1996. This years workshop included presentations from 25 speakers and had over 100 attendees. All of the presentations that were given are included in this proceedings. Topics of the papers included: defining service lifetime and developing models for PV module lifetime; examining and determining failure and degradation mechanisms in PV modules; combining IEEE/IEC/UL testing procedures; AC module performance and reliability testing; inverter reliability/qualification testing; standardization of utility interconnect requirements for PV systems; need activities to separate variables by testing individual components of PV systems (e.g. cells, modules, batteries, inverters,charge controllers) for individual reliability and then test them in actual system configurations; more results reported from field experience on modules, inverters, batteries, and charge controllers from field deployed PV systems; and system certification and standardized testing for stand-alone and grid-tied systems.

  6. FIELD RELIABILITY OF ELECTRONIC SYSTEMS

    E-Print Network [OSTI]

    study of in-the-field experience of electronics reliability. Tage Elm. Abstract. This report and internally) induced failures. The report is not meant to be merely an indication of the state of the art for the re- liability prediction methods we know, but also as a contribution to the investigation of man-machine

  7. Request Form

    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 Scienceand Requirements Recently ApprovedReliability TechnologyRenewalReportReports

  8. Gearbox Reliability Collaborative Bearing Calibration

    SciTech Connect (OSTI)

    van Dam, J.

    2011-10-01T23:59:59.000Z

    NREL has initiated the Gearbox Reliability Collaborative (GRC) to investigate the root cause of the low wind turbine gearbox reliability. The GRC follows a multi-pronged approach based on a collaborative of manufacturers, owners, researchers and consultants. The project combines analysis, field testing, dynamometer testing, condition monitoring, and the development and population of a gearbox failure database. At the core of the project are two 750kW gearboxes that have been redesigned and rebuilt so that they are representative of the multi-megawatt gearbox topology currently used in the industry. These gearboxes are heavily instrumented and are tested in the field and on the dynamometer. This report discusses the bearing calibrations of the gearboxes.

  9. Power Reliability at BASF Corporation

    E-Print Network [OSTI]

    Theising, T. R.

    2011-01-01T23:59:59.000Z

    Power Reliability at BASF Corporation Thomas R. Theising Energy Systems Manager BASF Corporation ABSTRACT: Quality is defined not as what the supplier puts into the product but what the customer gets out and is willing to pay for. Power.... INTRODUCTION: BASF often identifies its? power quality by the effects it has on its ability to manufacture products. Improvements are made to remedy the power quality problems either through the elimination of the problems or through some means...

  10. Power Reliability at BASF Corporation

    E-Print Network [OSTI]

    Theising, T. R.

    2012-01-01T23:59:59.000Z

    Power Reliability at BASF Corporation Thomas R. Theising Energy Systems Manager BASF Corporation ABSTRACT: Quality is defined not as what the supplier puts into the product but what the customer gets out and is willing to pay for. Power.... INTRODUCTION: BASF often identifies its? power quality by the effects it has on its ability to manufacture products. Improvements are made to remedy the power quality problems either through the elimination of the problems or through some means...

  11. Microgrids and Heterogeneous Security, Quality, Reliability, and Availability

    E-Print Network [OSTI]

    Marnay, Chris

    2007-01-01T23:59:59.000Z

    and Energy Reliability, Distribution System Integrationand Energy Reliability, Distribution System Integration

  12. Reliability Assessment Incorporating Operational Considerations and Economic

    E-Print Network [OSTI]

    PSERC Reliability Assessment Incorporating Operational Considerations and Economic Aspects Engineering Research Center Reliability Assessment Incorporating Operational Considerations and Economic and Economic Aspects for Large Interconnected Grids." We express our appreciation for the support provided

  13. Electric Power Reliability in Chemical Plants

    E-Print Network [OSTI]

    Cross, M. B.

    The quality and reliability of utility-generated electric power is presently receiving a great deal of attention from the chemical and refining industry. What changes have taken place to make electric power reliability a major topic of discussion...

  14. Arnold Schwarzenegger REAL-TIME GRID RELIABILITY

    E-Print Network [OSTI]

    Energy Research (PIER) California Energy Commission Beth Chambers Contract Manager Jamie Patterson (VSA) prototype to monitor system voltage conditions and provide real time dispatchers with reliabilityArnold Schwarzenegger Governor REAL-TIME GRID RELIABILITY MANAGEMENT California ISO Real

  15. Data Communication Principles Reliable Data Transfer

    E-Print Network [OSTI]

    Ramkumar, Mahalingam

    Data Communication Principles Switching Reliable Data Transfer Data Communication Basics Mahalingam Ramkumar Mississippi State University, MS September 8, 2014 Ramkumar CSE 4153 / 6153 #12;Data Communication Principles Switching Reliable Data Transfer 1 Data Communication Principles Data Rate of a Communication

  16. Reliability Analysis of Microelectronic Components and Materials

    E-Print Network [OSTI]

    Berlin,Technische Universität

    1 Reliability Analysis of Microelectronic Components and Materials Increasing numbers on the structural integrity of embedded micro- electronic components and assemblies. Improved knowledge and modeling methods are critical for the reliable use of electronic packages. In particular, since the advent

  17. Electric Power Reliability in Chemical Plants 

    E-Print Network [OSTI]

    Cross, M. B.

    1989-01-01T23:59:59.000Z

    at plants across the country? Has the quality and reliability of utility-generated power deteriorated over the past five or ten years? Or, has the perception of what constitutes reliable power changed with the advent, installation, and increasing usage...

  18. Distributed Generation Operational Reliability, Executive Summary...

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

    2004 This report summarizes the results of the project, "Distributed Generation Market Transformation Tools: Distributed Generation Reliability and Availability Database,"...

  19. Reliability Challenges for Solar Energy (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2009-12-08T23:59:59.000Z

    Presentation that reviews reliability issues related to various types of photovoltaic tecnnologies, including crystalline silicon, thin films, and concentrating PV.

  20. LUNAR MASS SPECTROMETER RELIABILITY LOGIC DIAGRAM

    E-Print Network [OSTI]

    Rathbun, Julie A.

    point (A) to (F). The block diagram also defines the reliability functions for the purpose of FMEA 1

  1. Reliability-based casing design

    SciTech Connect (OSTI)

    Maes, M.A. [Univ. of Calgary, Alberta (Canada). Civil Engineering Dept.; Gulati, K.C.; Johnson, R.C. [Mobil Research and Development Corp., Dallas, TX (United States); McKenna, D.L. [Mobil Producing Nigeria, Lagos (Nigeria); Brand, P.R.; Lewis, D.B. [Mobil E and P Technical Center, Dallas, TX (United States)

    1995-06-01T23:59:59.000Z

    The present paper describes the development of reliability-based design criteria for oil and/or gas well casing/tubing. The approach is based on the fundamental principles of limit state design. Limit states for tubulars are discussed and specific techniques for the stochastic modeling of loading and resistance variables are described. Zonation methods and calibration techniques are developed which are geared specifically to the characteristic tubular design for both hydrocarbon drilling and production applications. The application of quantitative risk analysis to the development of risk-consistent design criteria is shown to be a major and necessary step forward in achieving more economic tubular design.

  2. Dispatcher Reliability Analysis : SPICA-RAIL Experiments

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    consider that humans are fully reliable. But experience shows that many accidents involve human failuresDispatcher Reliability Analysis : SPICA-RAIL Experiments Fabien Belmonte, Jean-Louis Boulanger of scenarios and evaluate the behaviour of human operators. A state of the art in human reliability is pre

  3. RELIABILITY-BASED CASTING PROCESS DESIGN OPTIMIZATION

    E-Print Network [OSTI]

    Beckermann, Christoph

    RELIABILITY-BASED CASTING PROCESS DESIGN OPTIMIZATION Richard Hardin1 , K.K. Choi1 , and Christoph 52242-1527 Keywords: Casting Process Design, Optimization, Reliability-Based Design Optimization purpose reliability-based design optimization (RBDO) software tool previously developed at the University

  4. Human Reliability Analysis for Small Modular Reactors

    SciTech Connect (OSTI)

    Ronald L. Boring; David I. Gertman

    2012-06-01T23:59:59.000Z

    Because no human reliability analysis (HRA) method was specifically developed for small modular reactors (SMRs), the application of any current HRA method to SMRs represents tradeoffs. A first- generation HRA method like THERP provides clearly defined activity types, but these activity types do not map to the human-system interface or concept of operations confronting SMR operators. A second- generation HRA method like ATHEANA is flexible enough to be used for SMR applications, but there is currently insufficient guidance for the analyst, requiring considerably more first-of-a-kind analyses and extensive SMR expertise in order to complete a quality HRA. Although no current HRA method is optimized to SMRs, it is possible to use existing HRA methods to identify errors, incorporate them as human failure events in the probabilistic risk assessment (PRA), and quantify them. In this paper, we provided preliminary guidance to assist the human reliability analyst and reviewer in understanding how to apply current HRA methods to the domain of SMRs. While it is possible to perform a satisfactory HRA using existing HRA methods, ultimately it is desirable to formally incorporate SMR considerations into the methods. This may require the development of new HRA methods. More practicably, existing methods need to be adapted to incorporate SMRs. Such adaptations may take the form of guidance on the complex mapping between conventional light water reactors and small modular reactors. While many behaviors and activities are shared between current plants and SMRs, the methods must adapt if they are to perform a valid and accurate analysis of plant personnel performance in SMRs.

  5. OPTIMAL RELIABILITY ALLOCATION IN SERIES-PARALLEL SYSTEMS FROM COMPONENTS' DISCRETE COST -RELIABILITY DATA SETS

    E-Print Network [OSTI]

    Smith, Alice E.

    is not known. Instead, we consider the more realistic assumption of discrete cost-reliability data sets expressions for cost-reliability curves, we consider discrete cost-reliability data sets for each componentOPTIMAL RELIABILITY ALLOCATION IN SERIES-PARALLEL SYSTEMS FROM COMPONENTS' DISCRETE COST

  6. Software reliability models for critical applications

    SciTech Connect (OSTI)

    Pham, H.; Pham, M.

    1991-12-01T23:59:59.000Z

    This report presents the results of the first phase of the ongoing EG G Idaho, Inc. Software Reliability Research Program. The program is studying the existing software reliability models and proposes a state-of-the-art software reliability model that is relevant to the nuclear reactor control environment. This report consists of three parts: (1) summaries of the literature review of existing software reliability and fault tolerant software reliability models and their related issues, (2) proposed technique for software reliability enhancement, and (3) general discussion and future research. The development of this proposed state-of-the-art software reliability model will be performed in the second place. 407 refs., 4 figs., 2 tabs.

  7. Software reliability models for critical applications

    SciTech Connect (OSTI)

    Pham, H.; Pham, M.

    1991-12-01T23:59:59.000Z

    This report presents the results of the first phase of the ongoing EG&G Idaho, Inc. Software Reliability Research Program. The program is studying the existing software reliability models and proposes a state-of-the-art software reliability model that is relevant to the nuclear reactor control environment. This report consists of three parts: (1) summaries of the literature review of existing software reliability and fault tolerant software reliability models and their related issues, (2) proposed technique for software reliability enhancement, and (3) general discussion and future research. The development of this proposed state-of-the-art software reliability model will be performed in the second place. 407 refs., 4 figs., 2 tabs.

  8. Electricity Delivery and Energy Reliability | Department of Energy

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

    Electricity Delivery and Energy Reliability Electricity Delivery and Energy Reliability information about the delivery of electricity and energy reliability Electricity Delivery...

  9. Microgrids and Heterogeneous Security, Quality, Reliability, and Availability

    E-Print Network [OSTI]

    Marnay, Chris

    2007-01-01T23:59:59.000Z

    quality, reliability, and availability,” IEEE Power & EnergyReliability, and Availability Chris Marnay EnvironmentalQuality, Reliability, and Availability C. Marnay Ernest

  10. Reliable computation of homogeneous azeotropes

    SciTech Connect (OSTI)

    Maier, R.W.; Brennecke, J.F.; Stadtherr, M.A. [Univ. of Notre Dame, IN (United States). Dept. of Chemical Engineering] [Univ. of Notre Dame, IN (United States). Dept. of Chemical Engineering

    1998-08-01T23:59:59.000Z

    It is important to determine the existence and composition of homogeneous azeotropes in the analysis of phase behavior and in the synthesis and design of separation systems, from both theoretical and practical standpoints. A new method for reliably locating any and all homogeneous azeotropes for multicomponent mixtures is presented. The method also verifies the nonexistence of homogeneous azeotropes if none are present. The method is based on interval analysis, in particular an interval-Newton/generalized-bisection-algorithm providing a mathematical and computational guarantee that all azeotropes are located. This general-purpose technique can be applied in connection with any thermodynamic models. The technique is illustrated in several example problems using the Wilson, NRTL, and UNIQUAC activity-coefficient models.

  11. Differential forms

    E-Print Network [OSTI]

    Poniz, Philip

    1976-01-01T23:59:59.000Z

    ~ . . . , e )u A . . . A u REMARK 4. 16. Since there are pk) possibilities to chose among n ele- ments the set of k distinct elements the dimension of the space Ak(R ;R) equals (&) for nk k 26 CHAPTER V DIFFERENTIAL FORMS ? INTRODUCTION AND DEFINITION... v(x) (41, . . . , 4k 1) (m (x) (g )) (62, . . . , 4k I) (7. 1) Since (m (x))(4 ) c A (E;F) Theorem 4. 1. ). it follows that v(x) t Al k(Ei ) ~ ( We now introduce the mapping dm:U ~ A + (E;F) defined as follows: dw(x) = v(x) = Esgn(p)pv(x). Pt...

  12. JLF Forms

    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 > The Energy Materials Center atdiffusivities inJLF Forms JLF Target Fab

  13. New algorithm for the reliability analysis of multi-terminal networks

    SciTech Connect (OSTI)

    Satyanarayana, A.; Hagstrom, J.N.

    1981-10-01T23:59:59.000Z

    In a probabilistic network, source-to-multiple-terminal reliability (SMT reliability) is the probability that a specified vertex can reach every other vertex. A new topological formula for the SMT reliability of probabilistic networks. The formula generates only non-cancelling terms. The non-cancelling terms in the reliability expression correspond one-to-one with the acyclic t-subgraphs of the network. An acyclic t-subgraph is an acyclic graph in which every link is in at least one spanning rooted tree of the graph. The sign to be associated with each term is easily computed by counting the vertices and links in the corresponding subgraph. Overall reliability is the probability that every vertex can reach every other vertex in the network. For an undirected network, it is shown the SMT reliability is equal to the overall reliability. The formula is general and applies to networks containing directed or undirected links. Furthermore link failures in the network can be s-dependent. An algorithm is presented for generating all acyclic t-subgraphs and computing the reliability of the network. The reliability expression is obtained in symbolic factored form.

  14. Power as a function of reliability

    SciTech Connect (OSTI)

    Abate, M.L. [Sandia National Labs., Albuquerque, NM (United States); McCabe, G.P.; Lynch, M.P. [Purdue Univ., Lafayette, IN (United States)

    1995-10-01T23:59:59.000Z

    Many studies employ multiple measurement instruments such as human raters, observers, judges, or mechanical gauges to record subject data. It is well known that the consistency of these instruments, commonly called rater reliability, limits the extent to which conclusions should be drawn from the observed data. However, the degree to which rater reliability limits conclusions has traditionally been assessed in only subjective manners. In this paper, a method is developed for objectively quantifying the impact of rate reliability on the statistical analysis of data from a commonly used collection scheme. This method allows the inclusion of a reliability index in statistical power calculations and is an invaluable tool in the planning of experiments.

  15. General Order Ensuring Reliable Electric Service (Louisiana)

    Broader source: Energy.gov [DOE]

    The standards set forth herein have been developed to provide consumers, the Louisiana Public Service Commission, and jurisdictional electric utilities with a uniform method of ensuring reliable...

  16. Thermoelectric Materials By Design: Mechanical Reliability (Agreement...

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

    enable improvements in TE device design, optimization, and maximum reliability. * Next year will involve: - Continued TE material database generation. - TE modeling and...

  17. Improving Wind Turbine Gearbox Reliability: Preprint

    SciTech Connect (OSTI)

    Musial, W.; Butterfield, S.; McNiff, B.

    2007-06-01T23:59:59.000Z

    This paper describes a new research and development initiative to improve gearbox reliability in wind turbines begun at the National Renewable Energy Laboratory (NREL) in Golden, Colorado, USA.

  18. RTI International Develops SSL Luminaire Reliability Model |...

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

    is developing and validating accelerated life testing (ALT) methodologies and a reliability model for predicting the lifetime of integrated solid-state lighting...

  19. Electricity Delivery and Energy Reliability PROGRAM DESCRIPTION

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

    (PSA) program provides expert technical assistance to states, tribes and regions on electricity policies, programs and market mechanisms that increase access to reliable,...

  20. Sandia National Laboratories: Inverter Reliablity Program

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

    simulations to look for corresponding changes in behavioral parameters of ... Inverter Reliability Program On December 18, 2012, in As scientists and engineers improve the...

  1. Sandia National Laboratories: PV Reliability Operations Maintenance...

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

    Maintenance database Sandia-Electric Power Research Institute Partnership Publishes Photovoltaic Reliability Report On January 21, 2014, in Energy, Facilities, Grid...

  2. Sandia National Laboratories: PV Systems Reliability

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

    fluid phenomena of internal inverter components, and their impact on ... Inverter Reliability Program On December 18, 2012, in As scientists and engineers improve the...

  3. NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary Disturbance...

    Office of Environmental Management (EM)

    Preliminary Disturbance Report The following information represents a partial sequence of events based upon Reliability Coordinator information available to NERC. It is not...

  4. Sandia Energy - Continuous Reliability Enhancement for Wind ...

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

    Enhancement for Wind (CREW): Project Update Home Renewable Energy Energy News Wind Energy News & Events Systems Analysis Continuous Reliability Enhancement for Wind (CREW):...

  5. Comments of North American Electric Reliability Corporation ...

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

    currently developing a report, entitled "Reliability Consideration from Integration of Smart Grid" that will address many of the issues raised in the DOE RFI. North American...

  6. Sandia National Laboratories: Materials & Manufacturing Reliability...

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

    Materials & Manufacturing Reliability Program Biofouling Studies on Sandia's Marine Hydrokinetic Coatings Initiated at PNNL's Sequim Bay On June 26, 2014, in Energy, Materials...

  7. Competition and Reliability in North American Electricity Markets...

    Energy Savers [EERE]

    Electricity Markets Technical Workshop Competition and Reliability in North American Electricity Markets Technical Workshop Competition and Reliability in North American...

  8. PV Performance and Reliability Validation Capabilities at Sandia...

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

    Performance and Reliability Validation Capabilities at Sandia National Laboratories PV Performance and Reliability Validation Capabilities at Sandia National Laboratories This...

  9. Evaluation of MHTGR fuel reliability

    SciTech Connect (OSTI)

    Wichner, R.P. [Oak Ridge National Lab., TN (United States); Barthold, W.P. [Barthold Associates, Inc., Knoxville, TN (United States)

    1992-07-01T23:59:59.000Z

    Modular High-Temperature Gas-Cooled Reactor (MHTGR) concepts that house the reactor vessel in a tight but unsealed reactor building place heightened importance on the reliability of the fuel particle coatings as fission product barriers. Though accident consequence analyses continue to show favorable results, the increased dependence on one type of barrier, in addition to a number of other factors, has caused the Nuclear Regulatory Commission (NRC) to consider conservative assumptions regarding fuel behavior. For this purpose, the concept termed ``weak fuel`` has been proposed on an interim basis. ``Weak fuel`` is a penalty imposed on consequence analyses whereby the fuel is assumed to respond less favorably to environmental conditions than predicted by behavioral models. The rationale for adopting this penalty, as well as conditions that would permit its reduction or elimination, are examined in this report. The evaluation includes an examination of possible fuel-manufacturing defects, quality-control procedures for defect detection, and the mechanisms by which fuel defects may lead to failure.

  10. Software Reliability Cases: The Bridge Between Hardware, Software and System Safety and Reliability

    SciTech Connect (OSTI)

    Herrmann, D.S.; Peercy, D.E.

    1999-01-08T23:59:59.000Z

    High integrity/high consequence systems must be safe and reliable; hence it is only logical that both software safety and software reliability cases should be developed. Risk assessments in safety cases evaluate the severity of the consequences of a hazard and the likelihood of it occurring. The likelihood is directly related to system and software reliability predictions. Software reliability cases, as promoted by SAE JA 1002 and 1003, provide a practical approach to bridge the gap between hardware reliability, software reliability, and system safety and reliability by using a common methodology and information structure. They also facilitate early insight into whether or not a project is on track for meeting stated safety and reliability goals, while facilitating an informed assessment by regulatory and/or contractual authorities.

  11. Fundamental mechanisms of micromachine reliability

    SciTech Connect (OSTI)

    DE BOER,MAARTEN P.; SNIEGOWSKI,JEFFRY J.; KNAPP,JAMES A.; REDMOND,JAMES M.; MICHALSKE,TERRY A.; MAYER,THOMAS K.

    2000-01-01T23:59:59.000Z

    Due to extreme surface to volume ratios, adhesion and friction are critical properties for reliability of Microelectromechanical Systems (MEMS), but are not well understood. In this LDRD the authors established test structures, metrology and numerical modeling to conduct studies on adhesion and friction in MEMS. They then concentrated on measuring the effect of environment on MEMS adhesion. Polycrystalline silicon (polysilicon) is the primary material of interest in MEMS because of its integrated circuit process compatibility, low stress, high strength and conformal deposition nature. A plethora of useful micromachined device concepts have been demonstrated using Sandia National Laboratories' sophisticated in-house capabilities. One drawback to polysilicon is that in air the surface oxidizes, is high energy and is hydrophilic (i.e., it wets easily). This can lead to catastrophic failure because surface forces can cause MEMS parts that are brought into contact to adhere rather than perform their intended function. A fundamental concern is how environmental constituents such as water will affect adhesion energies in MEMS. The authors first demonstrated an accurate method to measure adhesion as reported in Chapter 1. In Chapter 2 through 5, they then studied the effect of water on adhesion depending on the surface condition (hydrophilic or hydrophobic). As described in Chapter 2, they find that adhesion energy of hydrophilic MEMS surfaces is high and increases exponentially with relative humidity (RH). Surface roughness is the controlling mechanism for this relationship. Adhesion can be reduced by several orders of magnitude by silane coupling agents applied via solution processing. They decrease the surface energy and render the surface hydrophobic (i.e. does not wet easily). However, only a molecular monolayer coats the surface. In Chapters 3-5 the authors map out the extent to which the monolayer reduces adhesion versus RH. They find that adhesion is independent of RH up to a threshold value, depending on the coating chemistry. The mechanism for the adhesion increase beyond this threshold value is that the coupling agent reconfigures from a surface to a bulk phase (Chapter 3). To investigate the details of how the adhesion increase occurs, the authors developed the mechanics for adhesion hysteresis measurements. These revealed that near-crack tip compression is the underlying cause of the adhesion increase (Chapter 4). A vacuum deposition chamber for silane coupling agent deposition was constructed. Results indicate that vapor deposited coatings are less susceptible to degradation at high RH (Chapter 5). To address issues relating to surfaces in relative motion, a new test structure to measure friction was developed. In contrast to other surface micromachined friction test structures, uniform apparent pressure is applied in the frictional contact zone (Chapter 6). The test structure will enable friction studies over a large pressure and dynamic range. In this LDRD project, the authors established an infrastructure for MEMS adhesion and friction metrology. They then characterized in detail the performance of hydrophilic and hydrophobic films under humid conditions, and determined mechanisms which limit this performance. These studies contribute to a fundamental understanding for MEMS reliability design rules. They also provide valuable data for MEMS packaging requirements.

  12. Demand Response and Electric Grid Reliability

    E-Print Network [OSTI]

    Wattles, P.

    2012-01-01T23:59:59.000Z

    Demand Response and Electric Grid Reliability Paul Wattles Senior Analyst, Market Design & Development, ERCOT CATEE Conference, Galveston October 10, 2012 2 North American Bulk Power Grids CATEE Conference October 10, 2012 ? The ERCOT... adequacy ? ?Achieving more DR participation would . . . displace some generation investments, but would achieve the same level of reliability... ? ?Achieving this ideal requires widespread demand response and market structures that enable loads...

  13. Wind Energy Facility Reliability and Maintenance

    E-Print Network [OSTI]

    Ding, Yu

    Wind Energy Facility Reliability and Maintenance Eunshin Byon, Lewis Ntaimo, Chanan Singh and Yu related to wind energy facility reliability and mainte- nance focused more on qualitative aspects. In this chapter, we provide a comprehensive account of the existing research regarding wind energy facility

  14. Probabilistic Reliable Message Transmission Subodh Kumar

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    Probabilistic Reliable Message Transmission Subodh Kumar January 17, 1996 Abstract Most communication systems require reliable transmission of a sequence of messages over a physical network which can with messages by the sender and they are acknowledged by the receiver. It is known that protocols that use

  15. Advances in Safety, Reliability and Risk Management -Proceedings of the European Safety and Reliability Conference, ESREL 2011 -European Safety and Reliability Conference: Advances in Safety, Reliability and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Advances in Safety, Reliability and Risk Management - Proceedings of the European Safety, Reliability and Risk Management, ESREL 2011, Troyes : France (2011) In France, more than 99% of failed is global risk management. This allows analysis of the major risks faced by the busi- ness (loss

  16. Engineering Reliability into Web Sites: Google SRE

    E-Print Network [OSTI]

    Tomkins, Andrew

    Engineering Reliability into Web Sites: Google SRE Alex Perry alex.perry@google.com Santa Monica SRE, Google #12;Abstract This talk introduces Site Reliability Engineering (SRE) at Google, explaining team responsibilities by site Failures and instability consuming manpower Engineering being applied

  17. : : ". RSST I Lunar Day Counter Reliability Analysis

    E-Print Network [OSTI]

    Rathbun, Julie A.

    : : ". RSST I Lunar Day Counter Reliability Analysis NO. ATM 846 PAGE 1 REV. MO. OF 10 DATE 12/3/69 This ATM presents a Reliability analysis of the Lunar Day Counter, the Resettable Solid State Timer (RSST equipment. The analysis is based on a parts count, average failure rates and two (2) years operation

  18. NISTIR 7817 A Credential Reliability and

    E-Print Network [OSTI]

    NISTIR 7817 A Credential Reliability and Revocation Model for Federated Identities Hildegard Ferraiolo http://dx.doi.org/10.6028/NIST.IR.7817 #12;NISTIR 7817 A Credential Reliability and Revocation Interagency Report 7817 22 pages (Nov. 2012) Certain commercial entities, equipment, or materials may

  19. Reliable Distributed Computing for Decision Support Systems

    E-Print Network [OSTI]

    Bargiela, Andrzej

    Reliable Distributed Computing for Decision Support Systems Taha Osman, Andrzej Bargiela Department of application tasks on the currently avail- able computing nodes. Distributed Systems Reliability Due decision-support systems such as water distribution net- works, involving hundreds or even thousands

  20. Reliability of underwater hearing thresholds in pinnipeds

    E-Print Network [OSTI]

    Reichmuth, Colleen

    Reliability of underwater hearing thresholds in pinnipeds Brandon L. Southall Long Marine and certain testing parameters (e.g., equipment and research personnel), measured underwater hearing (0.2­6.4 kHz). These data address the reliability of acoustic signal detection measurements over time

  1. NREL's Gearbox Reliability Collaborative leads to wind turbine gearbox reliability, lowering the cost of energy.

    E-Print Network [OSTI]

    the cost of energy. Unintended gearbox failures have a significant impact on the cost of wind farm will result in increased gearbox reliability and an overall reduction in the cost of wind energy. ProjectNREL's Gearbox Reliability Collaborative leads to wind turbine gearbox reliability, lowering

  2. Adaptive Reliability Analysis of Excavation Problems

    E-Print Network [OSTI]

    Park, Jun Kyung

    2012-10-19T23:59:59.000Z

    . This analysis couples the adaptive design capabilities of the observational method with updated reliability indices, to be used in risk-based design decisions. A probabilistic framework is developed to predict three-dimensional deformation profiles due...

  3. Demand Response For Power System Reliability: FAQ

    SciTech Connect (OSTI)

    Kirby, Brendan J [ORNL

    2006-12-01T23:59:59.000Z

    Demand response is the most underutilized power system reliability resource in North America. Technological advances now make it possible to tap this resource to both reduce costs and improve. Misconceptions concerning response capabilities tend to force loads to provide responses that they are less able to provide and often prohibit them from providing the most valuable reliability services. Fortunately this is beginning to change with some ISOs making more extensive use of load response. This report is structured as a series of short questions and answers that address load response capabilities and power system reliability needs. Its objective is to further the use of responsive load as a bulk power system reliability resource in providing the fastest and most valuable ancillary services.

  4. Reliability-Based Optimization Using Evolutionary Algorithms

    E-Print Network [OSTI]

    Deb, Kalyanmoy

    Uncertainties in design variables and problem parameters are often inevitable and must be considered in an optimization task if reliable optimal solutions are sought. Besides a number of sampling techniques, there exist ...

  5. Reliability Challenges for Solar Energy (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2009-04-27T23:59:59.000Z

    PV industry can benefit from reliability testing experience of microelectronics industry . Si modules perform well in field; CdTe/CIGS must be sealed to moisture; CPV in product development stage.

  6. PV Module Reliability Research (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-06-01T23:59:59.000Z

    This National Center for Photovoltaics sheet describes the capabilities of its PV module reliability research. The scope and core competencies and capabilities are discussed and recent publications are listed.

  7. Photovoltaic Reliability and Engineering (Revised) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-06-01T23:59:59.000Z

    Capabilities fact sheet for the National Center for Photovoltaics: Photovoltaic Reliability and Engineering. One-sided sheet that includes Scope, Core Competencies and Capabilities, and Contact/Web information.

  8. Sandia National Laboratories: Physics of Reliability: Evaluating...

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

    Physics of Reliability: Evaluating Design Insights for Component Technologies in Solar program Sandia R&D Funded under New DOE SunShot Program On November 27, 2013, in Energy,...

  9. Reliability Issues for Photovoltaic Modules (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2009-10-01T23:59:59.000Z

    Si modules good in field; new designs need reliability testing. CdTe & CIGS modules sensitive to moisture; carefully seal. CPV in product development stage; benefits from expertise in other industries.

  10. Sandia National Laboratories: increase power system reliability

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

    reliability Sandia, DOE Energy Storage Program, GeneSiC Semiconductor, U.S. Army ARDEC: Ultra-High-Voltage Silicon Carbide Thyristors On March 29, 2013, in Capabilities,...

  11. RELIABILITY IMPROVEMENT OF BART TRAIN CONTROL

    E-Print Network [OSTI]

    Turner, D.B.

    2011-01-01T23:59:59.000Z

    equipment to resolve equipment reliability problems must bereliability problems was seen to be a mandatory first step in improving equipmentreliability of the Bay Area Rapid Tran- sit district's vehicle-borne Automatic Train Control equipment.

  12. Improving Network Reliability: Analysis, Methodology, and Algorithms

    E-Print Network [OSTI]

    Booker, Graham B.

    2010-07-14T23:59:59.000Z

    The reliability of networking and communication systems is vital for the nation's economy and security. Optical and cellular networks have become a critical infrastructure and are indispensable in emergency situations. This dissertation outlines...

  13. On the internet grouping for reliable multicasting

    E-Print Network [OSTI]

    Ghanem, Mohamed M.

    1996-01-01T23:59:59.000Z

    ON THE INTERNET GROUPING FOR RELIABLE MULTICASTING A Thesis by MOHAMED M. GHANEM Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1996... Major Subject: Computer Science ON THF, INTERNET GROUPING I'OR RELIABLE MULTICASTING A Thesis by MOHAMED M. GHANEM Submitted to Texas ASM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved...

  14. Reliability and Functional Availability of HVAC Systems

    E-Print Network [OSTI]

    Myrefelt, S.

    2004-01-01T23:59:59.000Z

    RELIABILITY AND FUNCTIONAL AVAILABILITY OF HVAC SYSTEMS Sonny Myrefelt Dep. of Build. Serv. Eng., KTH, 10044 Stockholm, Sweden, and SKANSKA Sydost, V?xj?, Sweden Summary This paper presents a model to calculate the reliability... system, therefore, there must be sufficient documentation of design airflow rates. The compulsory ventilation checks performed in Sweden have focused on the importance of maintaining the design air flow rates. More about this activity can be seen...

  15. Gearbox Reliability Collaborative (GRC) Description and Loading

    SciTech Connect (OSTI)

    Oyague, F.

    2011-11-01T23:59:59.000Z

    This document describes simulated turbine load cases in accordance to the IEC 61400-1 Ed.3 standard, which is representative of the typical wind turbine design process. The information presented herein is intended to provide a broad understanding of the gearbox reliability collaborative 750kW drivetrain and turbine configuration. In addition, fatigue and ultimate strength drivetrain loads resulting from simulations are presented. This information provides the bases for the analytical work of the gearbox reliability collaborative effort.

  16. Nuclear Power - Control, Reliability and Human Factors

    E-Print Network [OSTI]

    of Actinides: Where Do We Stand with the Accelerator Mass Spectrometry Technique? 167 Mario De Cesare Part 2 Reliability and Failure Mechanisms 187 Chapter 10 Evaluation of Dynamic J-R Curve for Leak Before Break Design of Nuclear Reactor Coolant Piping... Network 6. Autonomous Control for Space 7. Radiation-Hard and Intelligent Optical Fiber Sensors 8. Monitoring Radioactivity 9. Origin and Detection of Actinides ? Reliability and Failure Mechanisms 10. Dynamic J-R Curve for Leak Analysis 11...

  17. Electric Power monthly, November 1995 with data for August 1995

    SciTech Connect (OSTI)

    NONE

    1995-11-15T23:59:59.000Z

    This report presents monthly electricity statistics, with the purpose of providing energy decisionmakers with accurate, timely information that may be used in forming various perspectives on electric issues that lie ahead. EIA collected the information in this report to fulfill its data collection and dissemination responsibilities; the information are from six data sources: forms EIA-759, FERC Form 423, EIA-826, EIA-861, EIA-860, and Form OE-417R. An article on reclicensing and environmental issues affecting hydropower is included. Then the statistics are presented in: US electric power at a glance, utility net generation, utility consumption of fossil fuels, fossil-fuel stocks at utilities, fossil fuel receipts and costs, utility sales/revenue/average revenue per kWh, and monthly plant aggregates. Finally, nonutility power producer statistics, bibliography, technical notes, and a glossary are presented.

  18. Measurement Practices for Reliability and Power Quality

    SciTech Connect (OSTI)

    Kueck, JD

    2005-05-06T23:59:59.000Z

    This report provides a distribution reliability measurement ''toolkit'' that is intended to be an asset to regulators, utilities and power users. The metrics and standards discussed range from simple reliability, to power quality, to the new blend of reliability and power quality analysis that is now developing. This report was sponsored by the Office of Electric Transmission and Distribution, U.S. Department of Energy (DOE). Inconsistencies presently exist in commonly agreed-upon practices for measuring the reliability of the distribution systems. However, efforts are being made by a number of organizations to develop solutions. In addition, there is growing interest in methods or standards for measuring power quality, and in defining power quality levels that are acceptable to various industries or user groups. The problems and solutions vary widely among geographic areas and among large investor-owned utilities, rural cooperatives, and municipal utilities; but there is still a great degree of commonality. Industry organizations such as the National Rural Electric Cooperative Association (NRECA), the Electric Power Research Institute (EPRI), the American Public Power Association (APPA), and the Institute of Electrical and Electronics Engineers (IEEE) have made tremendous strides in preparing self-assessment templates, optimization guides, diagnostic techniques, and better definitions of reliability and power quality measures. In addition, public utility commissions have developed codes and methods for assessing performance that consider local needs. There is considerable overlap among these various organizations, and we see real opportunity and value in sharing these methods, guides, and standards in this report. This report provides a ''toolkit'' containing synopses of noteworthy reliability measurement practices. The toolkit has been developed to address the interests of three groups: electric power users, utilities, and regulators. The report will also serve to support activities to develop and share information among industry and regulatory participants about critical resources and practices. The toolkit has been developed by investigating the status of indices and definitions, surveying utility organizations on information sharing, and preparing summaries of reliability standards and monitoring requirements--the issues, needs, work under way, existing standards, practices and guidelines--for the following three classifications: (1) terms and definitions of reliability; (2) power quality standards, guidelines, and measurements; and (3) activities and organizations developing and sharing information on distribution reliability. As these synopses of reliability measurement practices are provided, it must be noted that an economic penalty may be associated with requiring too high a reliability level from the distribution system for all customers. It may be appropriate for the distribution system to supply only some base, generally accepted level of reliability. This base level would be adequate for the majority of customers. Users who need a higher level may find it economical to supply using distributed energy resources (DER) and other local solutions to reliability and power quality needs. Local solutions implemented by the customer may be the most cost-effective method for addressing the more stringent needs of a digital economy. These local solutions include energy storage, small distributed generators, and microgrids. This report also considers the market's role in addressing reliability issues and requirements. The customer's needs are discussed in view of issues such as power quality requirements of digital electronic equipment, the cost of outages, the cost of storage and new infrastructure, and natural gas prices. The market role in addressing these issues and requirements is explored. The economic considerations associated with the reliability issues are discussed, as well as the levels at which these economic decisions could be made. Finally, a discussion is provided of the role DER could play in addressing

  19. Measuring eating disorder attitudes and behaviors: a reliability generalization study

    E-Print Network [OSTI]

    Pearson, Crystal Anne

    2009-05-15T23:59:59.000Z

    I used reliability generalization procedures to determine the mean score reliability of the Eating Disorder Inventory (EDI), the Eating Attitudes Test (EAT), and the Bulimia Test (BULIT). Reliability generalization is a type of meta-analysis used...

  20. Basic concepts defining the property of ''reliability'' for energy systems

    SciTech Connect (OSTI)

    Rudenko, Yu.N.; Sin'chugov, F.I.; Smirnov, E.P.

    1981-01-01T23:59:59.000Z

    The basic concepts defining the complex property of ''reliability'' for energy systems (electric-power and pipeline systems) are considered; they include the properties, states, and events that characterize reliability as well as the reliability indices.

  1. Independent transmission system operators and their role in maintaining reliability in a restructured electric power industry

    SciTech Connect (OSTI)

    NONE

    1998-01-01T23:59:59.000Z

    This report summarizes the current status of proposals to form Independent System Operators (ISOs) to operate high-voltage transmission systems in the United States and reviews their potential role in maintaining bulk power system reliability. As background information, the likely new industry structure, nature of deregulated markets, and institutional framework for bulk power system reliability are reviewed. The report identifies issues related to the formation of ISOs and their roles in markets and in reliability, and describes potential policy directions for encouraging the formation of effective ISOs and ensuring bulk system reliability. Two appendices are provided, which address: (1) system operation arrangements in other countries, and (2) summaries of regional U.S. ISO proposals.

  2. Office of Electricity Delivery and Energy Reliability Recovery...

    Energy Savers [EERE]

    Electricity Delivery and Energy Reliability Recovery Program Plan Office of Electricity Delivery and Energy Reliability Recovery Program Plan Microsoft Word - OE PSRP June 5 2009...

  3. Effect of Jatropha based Biodiesel, on Engine Hardware Reliability...

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

    Jatropha based Biodiesel, on Engine Hardware Reliability, Emission and Performance Effect of Jatropha based Biodiesel, on Engine Hardware Reliability, Emission and Performance...

  4. Office of Electricity Delivery & Energy Reliability FY 2012 Budget...

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

    & Energy Reliability FY 2012 Budget Request Presentation Office of Electricity Delivery & Energy Reliability FY 2012 Budget Request Presentation Presentation by Patricia Hoffman of...

  5. An environmental sample chamber for reliable scanning transmission...

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

    environmental sample chamber for reliable scanning transmission x-ray microscopy measurements under water vapor. An environmental sample chamber for reliable scanning transmission...

  6. Improving the Reliability and Resiliency of the US Electric Grid...

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

    Improving the Reliability and Resiliency of the US Electric Grid: SGIG Article in Metering International, March 2012 Improving the Reliability and Resiliency of the US Electric...

  7. The Business Case for Fuel Cells 2013: Reliability, Resiliency...

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

    3: Reliability, Resiliency & Savings The Business Case for Fuel Cells 2013: Reliability, Resiliency & Savings This report, compiled by Fuel Cells 2000 with support from the Fuel...

  8. Reliability of islanded microgrids with stochastic generation and prioritized load

    E-Print Network [OSTI]

    Marden, Mirjana Milosevic

    The potential to improve distribution system reliability is a primary motivation behind the development and deployment of microgrids. Previous studies have illustrated substantial reliability benefits of dispatchable ...

  9. Thermal Stress and Reliability for Advanced Power Electronics...

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

    Performance and Reliability of Bonded Interfaces Physics of Failure of Electrical Interconnects Thermal Stress and Reliability for Advanced Power Electronics and Electric Machines...

  10. Now Available: Smart Grid Investments Improve Grid Reliability...

    Energy Savers [EERE]

    Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014) Now Available: Smart Grid Investments Improve Grid Reliability, Resilience, and...

  11. Letter from Pepco Holdings Regarding the Reliability of Electric...

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

    from Pepco Holdings Regarding the Reliability of Electric Service in the District of Columbia Letter from Pepco Holdings Regarding the Reliability of Electric Service in the...

  12. Integration of NDE Reliability and Fracture Mechanics

    SciTech Connect (OSTI)

    Becker, F. L.; Doctor, S. R.; Heas!er, P. G.; Morris, C. J.; Pitman, S. G.; Selby, G. P.; Simonen, F. A.

    1981-03-01T23:59:59.000Z

    The Pacific Northwest Laboratory is conducting a four-phase program for measuring and evaluating the effectiveness and reliability of in-service inspection (lSI} performed on the primary system piping welds of commercial light water reactors (LWRs). Phase I of the program is complete. A survey was made of the state of practice for ultrasonic rsr of LWR primary system piping welds. Fracture mechanics calculations were made to establish required nondestrutive testing sensitivities. In general, it was found that fatigue flaws less than 25% of wall thickness would not grow to failure within an inspection interval of 10 years. However, in some cases failure could occur considerably faster. Statistical methods for predicting and measuring the effectiveness and reliability of lSI were developed and will be applied in the "Round Robin Inspections" of Phase II. Methods were also developed for the production of flaws typical of those found in service. Samples fabricated by these methods wilI be used in Phase II to test inspection effectiveness and reliability. Measurements were made of the influence of flaw characteristics {i.e., roughness, tightness, and orientation) on inspection reliability. These measurernents, as well as the predictions of a statistical model for inspection reliability, indicate that current reporting and recording sensitivities are inadequate.

  13. Culture Representation in Human Reliability Analysis

    SciTech Connect (OSTI)

    David Gertman; Julie Marble; Steven Novack

    2006-12-01T23:59:59.000Z

    Understanding human-system response is critical to being able to plan and predict mission success in the modern battlespace. Commonly, human reliability analysis has been used to predict failures of human performance in complex, critical systems. However, most human reliability methods fail to take culture into account. This paper takes an easily understood state of the art human reliability analysis method and extends that method to account for the influence of culture, including acceptance of new technology, upon performance. The cultural parameters used to modify the human reliability analysis were determined from two standard industry approaches to cultural assessment: Hofstede’s (1991) cultural factors and Davis’ (1989) technology acceptance model (TAM). The result is called the Culture Adjustment Method (CAM). An example is presented that (1) reviews human reliability assessment with and without cultural attributes for a Supervisory Control and Data Acquisition (SCADA) system attack, (2) demonstrates how country specific information can be used to increase the realism of HRA modeling, and (3) discusses the differences in human error probability estimates arising from cultural differences.

  14. Software engineering practices for control system reliability

    SciTech Connect (OSTI)

    S. K. Schaffner; K. S White

    1999-04-01T23:59:59.000Z

    This paper will discuss software engineering practices used to improve Control System reliability. The authors begin with a brief discussion of the Software Engineering Institute's Capability Maturity Model (CMM) which is a framework for evaluating and improving key practices used to enhance software development and maintenance capabilities. The software engineering processes developed and used by the Controls Group at the Thomas Jefferson National Accelerator Facility (Jefferson Lab), using the Experimental Physics and Industrial Control System (EPICS) for accelerator control, are described. Examples are given of how their procedures have been used to minimized control system downtime and improve reliability. While their examples are primarily drawn from their experience with EPICS, these practices are equally applicable to any control system. Specific issues addressed include resource allocation, developing reliable software lifecycle processes and risk management.

  15. ASCE Specialty Conference on Probabilistic Mechanics and Structural Reliability ESTIMATING STRUCTURAL RELIABILITY UNDER HURRICANE WIND HAZARD

    E-Print Network [OSTI]

    Balaji, Rajagopalan

    STRUCTURAL RELIABILITY UNDER HURRICANE WIND HAZARD: APPLICATIONS TO WOOD STRUCTURES Balaji Rajagopalan.frangopol@colorado.edu Abstract A stochastic nonparametric framework to estimate structural reliability under hurricane wind Natural hazards in general and hurricanes in particular, lead to loss of life and tremendous property

  16. Accepted for publication in Reliability Engineering and System Safety Analyzing the topological, electrical and reliability

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Accepted for publication in Reliability Engineering and System Safety Analyzing the topological, electrical and reliability characteristics of a power transmission system for identifying its critical.zio@polimi.it Abstract The subject of this paper is the analysis of an electrical transmission system with the objective

  17. Design for Reliability: Case Studies in Manufacturing Process Synthesis Y. Lawrence Yao*, and Chao Liu

    E-Print Network [OSTI]

    Yao, Y. Lawrence

    Design for Reliability: Case Studies in Manufacturing Process Synthesis Y. Lawrence Yao*, and Chao of manufacturing process design is to determine a set of process parameters for a manufacturing task. The design. Such a methodology is illustrated in case studies involving process design of laser forming of sheet metal, in which

  18. Technique for Measuring Hybrid Electronic Component Reliability

    SciTech Connect (OSTI)

    Green, C.C.; Hernandez, C.L.; Hosking, F.M.; Robinson, D.; Rutherford, B.; Uribe, F.

    1999-01-01T23:59:59.000Z

    Materials compatibility studies of aged, engineered materials and hardware are critical to understanding and predicting component reliability, particularly for systems with extended stockpile life requirements. Nondestructive testing capabilities for component reliability would significantly enhance lifetime predictions. For example, if the detection of crack propagation through a solder joint can be demonstrated, this technique could be used to develop baseline information to statistically determine solder joint lifelengths. This report will investigate high frequency signal response techniques for nondestructively evaluating the electrical behavior of thick film hybrid transmission lines.

  19. Reliability Technology earns prestigious Los Alamos award

    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 Scienceand Requirements Recently ApprovedReliability Technology earns award Reliability Technology

  20. RELIABILITY CONSIDERATIONS OF ELECTRONICS COMPONENTS FOR THE DEEP UNDERWATER MUON AND NEUTRINO DETECTION SYSTEM

    E-Print Network [OSTI]

    Leskovar, B.

    2010-01-01T23:59:59.000Z

    1980 RELIABILITY CONSIDERATIONS OF ELECTRONICS COMPONENTS10548 RELIABILITY CONSIDERATIONS OF ELECTRONICS COMPONENTS™**"* ' Reliability Considerations of Electronics Components

  1. On the reliability of seasonal forecasts Antje Weisheimer

    E-Print Network [OSTI]

    Stevenson, Paul

    to plant in the coming season #12;Antje Weisheimer EQUIP workshop 14 March 2013 Reliability of reliability #12;Antje Weisheimer EQUIP workshop 14 March 2013 category 5 Perfect reliability Uncertainty ranges do include perfect reliability slope #12;Antje Weisheimer EQUIP workshop

  2. A Hierarchical Model for Estimating the Reliability of Complex Systems

    E-Print Network [OSTI]

    Reese, Shane

    an approximation to the joint posterior distribution on the total system reliability was obtained. Many reliability or bounding moments of the system reliability posterior distribution (Cole (1975), Mastran (1976), DostalA Hierarchical Model for Estimating the Reliability of Complex Systems Valen E. Johnson, Todd L

  3. Interval Analysis and Reliability in Robotics

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    be highly reliable (i.e. for a robot used in surgical applications). The sources of uncertainties will restrict ourself in this paper to industrial robot. These type of robots have a base that is attached the mechanism motion). There are two main classes of industrial robots mechani- cal architecture: serial

  4. New correlation calculates reliable paraffin solubilities

    SciTech Connect (OSTI)

    Yaws, C.L.; Pan, X. (Lamar Univ., Beaumont, TX (US))

    1991-04-08T23:59:59.000Z

    A new correlation based on boiling point has been developed which accurately calculates paraffin solubilities in water. The correlation provides reliable solubility values down to very low concentrations (parts per million and less), for which the API correlation is not accurate. It can be used for initial engineering studies, including those involving health, safety, and environmental considerations.

  5. Optical fiber reliability models M. John Matthewson

    E-Print Network [OSTI]

    Matthewson, M. John

    3 Optical fiber reliability models M. John Matthewson Fiber Optic Materials Research Program Systems containing optical fiber have design lives on the order of decades so that models for assessing and promising areas for future work are proposed. 1. INTRODUCTION Mechanical failure of optical fiber must

  6. Implementing the Reliable Server Pooling Thomas Dreibholz

    E-Print Network [OSTI]

    Dreibholz, Thomas

    Implementing the Reliable Server Pooling Framework Thomas Dreibholz University of Duisburg Server Pooling (RSerPool) pro- tocol suite currently under standardization by the IETF is designed, configuring, accessing and monitoring pools of server resources. But RSerPool is not only able to manage pools

  7. Grid Reliability- An Electric Utility Company's Perspective

    Broader source: Energy.gov [DOE]

    Presentation—given at the Federal Utility Partnership Working Group (FUPWG) Fall 2008 meeting—covers Southern Company's business continuity, North American Electric Reliability Corporation (NERC) cybersecurity, and homeland security as well as physical recovery after a major outage, and five questions to ask your local utility.

  8. Y AND RELIABILITY: LOGO MANUAL COLOR SCHEME

    E-Print Network [OSTI]

    Bordenstein, Seth

    AND RELIABILITY: LOGO MANUAL COLOR SCHEME TYPOGRAPHY RECOMMENDED DISPLAY SPACE PMS 131C PMS COOL GRAY 11C VERSION HORIZONTAL 1J COLOR SCHEME R=203 G=163 B=57 C=21 M=34 Y=93 K=2 20,0 @Me Nas $10M in equipment Machine shop equipped conference facility All-purpose machine shop Skilled engineering staff

  9. Invited Paper GaN HEMT reliability

    E-Print Network [OSTI]

    del Alamo, Jesús A.

    Invited Paper GaN HEMT reliability J.A. del Alamo *, J. Joh Microsystems Technology Laboratories mechanism recently identified in GaN high-electron mobility transistors subject to electrical stress. Under high voltage, it has been found that electrically active defects are generated in the AlGaN barrier

  10. "Reliability, Resiliency, and Restoration for Smarter Grid

    E-Print Network [OSTI]

    Ohta, Shigemi

    "Reliability, Resiliency, and Restoration for Smarter Grid Workshop" Save the Date April 3 and 4 at mohlsen@bnl.gov "The Resilient Smart Grid" to be held at Brookhaven National Laboratory Upton, Long Island://www.bnl.gov/maps/. This is the 5th workshop that BNL is hosting on the Smart Grid. This Workshop will build on the previous

  11. Structural Reliability: Assessing the Condition and Reliability of Casing in Compacting Reservoirs

    E-Print Network [OSTI]

    Chantose, Prasongsit

    2012-02-14T23:59:59.000Z

    . Effective stress may exceed rock compressive strength, inducing compaction. Wells in compacting reservoirs risk high failure and deformation rates. This project introduces the concept of structural reliability to quantify casing failure risks in compacting...

  12. Defect localization, characterization and reliability assessment in emerging photovoltaic devices.

    SciTech Connect (OSTI)

    Yang, Benjamin Bing-Yeh; Cruz-Campa, Jose Luis; Haase, Gad S.; Tangyunyong, Paiboon; Cole, Edward Isaac,; Okandan, Murat; Nielson, Gregory N.

    2014-04-01T23:59:59.000Z

    Microsystems-enabled photovoltaics (MEPV) can potentially meet increasing demands for light-weight, portable, photovoltaic solutions with high power density and efficiency. The study in this report examines failure analysis techniques to perform defect localization and evaluate MEPV modules. CMOS failure analysis techniques, including electroluminescence, light-induced voltage alteration, thermally-induced voltage alteration, optical beam induced current, and Seabeck effect imaging were successfully adapted to characterize MEPV modules. The relative advantages of each approach are reported. In addition, the effects of exposure to reverse bias and light stress are explored. MEPV was found to have good resistance to both kinds of stressors. The results form a basis for further development of failure analysis techniques for MEPVs of different materials systems or multijunction MEPVs. The incorporation of additional stress factors could be used to develop a reliability model to generate lifetime predictions for MEPVs as well as uncover opportunities for future design improvements.

  13. Human Reliability Analysis for Design: Using Reliability Methods for Human Factors Issues

    SciTech Connect (OSTI)

    Ronald Laurids Boring

    2010-11-01T23:59:59.000Z

    This paper reviews the application of human reliability analysis methods to human factors design issues. An application framework is sketched in which aspects of modeling typically found in human reliability analysis are used in a complementary fashion to the existing human factors phases of design and testing. The paper provides best achievable practices for design, testing, and modeling. Such best achievable practices may be used to evaluate and human system interface in the context of design safety certifications.

  14. Assessment of Preferred Depleted Uranium Disposal Forms

    SciTech Connect (OSTI)

    Croff, A.G.; Hightower, J.R.; Lee, D.W.; Michaels, G.E.; Ranek, N.L.; Trabalka, J.R.

    2000-06-01T23:59:59.000Z

    The Department of Energy (DOE) is in the process of converting about 700,000 metric tons (MT) of depleted uranium hexafluoride (DUF6) containing 475,000 MT of depleted uranium (DU) to a stable form more suitable for long-term storage or disposal. Potential conversion forms include the tetrafluoride (DUF4), oxide (DUO2 or DU3O8), or metal. If worthwhile beneficial uses cannot be found for the DU product form, it will be sent to an appropriate site for disposal. The DU products are considered to be low-level waste (LLW) under both DOE orders and Nuclear Regulatory Commission (NRC) regulations. The objective of this study was to assess the acceptability of the potential DU conversion products at potential LLW disposal sites to provide a basis for DOE decisions on the preferred DU product form and a path forward that will ensure reliable and efficient disposal.

  15. Sample sizes for confidence limits for reliability.

    SciTech Connect (OSTI)

    Darby, John L.

    2010-02-01T23:59:59.000Z

    We recently performed an evaluation of the implications of a reduced stockpile of nuclear weapons for surveillance to support estimates of reliability. We found that one technique developed at Sandia National Laboratories (SNL) under-estimates the required sample size for systems-level testing. For a large population the discrepancy is not important, but for a small population it is important. We found that another technique used by SNL provides the correct required sample size. For systems-level testing of nuclear weapons, samples are selected without replacement, and the hypergeometric probability distribution applies. Both of the SNL techniques focus on samples without defects from sampling without replacement. We generalized the second SNL technique to cases with defects in the sample. We created a computer program in Mathematica to automate the calculation of confidence for reliability. We also evaluated sampling with replacement where the binomial probability distribution applies.

  16. Bridging Resilience Engineering and Human Reliability Analysis

    SciTech Connect (OSTI)

    Ronald L. Boring

    2010-06-01T23:59:59.000Z

    There has been strong interest in the new and emerging field called resilience engineering. This field has been quick to align itself with many existing safety disciplines, but it has also distanced itself from the field of human reliability analysis. To date, the discussion has been somewhat one-sided, with much discussion about the new insights afforded by resilience engineering. This paper presents an attempt to address resilience engineering from the perspective of human reliability analysis (HRA). It is argued that HRA shares much in common with resilience engineering and that, in fact, it can help strengthen nascent ideas in resilience engineering. This paper seeks to clarify and ultimately refute the arguments that have served to divide HRA and resilience engineering.

  17. Reliability Estimation for Double Containment Piping

    SciTech Connect (OSTI)

    L. Cadwallader; T. Pinna

    2012-08-01T23:59:59.000Z

    Double walled or double containment piping is considered for use in the ITER international project and other next-generation fusion device designs to provide an extra barrier for tritium gas and other radioactive materials. The extra barrier improves confinement of these materials and enhances safety of the facility. This paper describes some of the design challenges in designing double containment piping systems. There is also a brief review of a few operating experiences of double walled piping used with hazardous chemicals in different industries. This paper recommends approaches for the reliability analyst to use to quantify leakage from a double containment piping system in conceptual and more advanced designs. The paper also cites quantitative data that can be used to support such reliability analyses.

  18. Electronic logic for enhanced switch reliability

    DOE Patents [OSTI]

    Cooper, J.A.

    1984-01-20T23:59:59.000Z

    A logic circuit is used to enhance redundant switch reliability. Two or more switches are monitored for logical high or low output. The output for the logic circuit produces a redundant and fail-safe representation of the switch outputs. When both switch outputs are high, the output is high. Similarly, when both switch outputs are low, the logic circuit's output is low. When the output states of the two switches do not agree, the circuit resolves the conflict by memorizing the last output state which both switches were simultaneously in and produces the logical complement of this output state. Thus, the logic circuit of the present invention allows the redundant switches to be treated as if they were in parallel when the switches are open and as if they were in series when the switches are closed. A failsafe system having maximum reliability is thereby produced.

  19. The Lightswitch Wizard -- reliable daylight simulations

    E-Print Network [OSTI]

    For Initial Design; C. F. Morrison; M. Dubrous; C. F. Reinhart ?; M. Morrison; F. Dubrous

    A web-based, non-expert daylighting analysis tool has been developed to support daylighting-related design decisions in peripheral private offices during an early design stage (http://buildwiz.com). The tool offers a comparative, reliable, and fast analysis of the annual amount of daylight in the offices (daylight factor and daylight autonomy) and the lighting energy performance of automated lighting controls (occupancy sensors, photocells) compared to standard on/off switches. Blinds are either manually or automatically controlled.

  20. APPENDIX A: Forms and Instructions Form Form R93D-44 Form R93D...

    U.S. Energy Information Administration (EIA) Indexed Site

    .... Mid-Year Coding Form ... Coding and Data Entry Control Card ... Mid-Year Keying Instructions ......

  1. Reliability Evaluation of Electric Power Generation Systems with Solar Power 

    E-Print Network [OSTI]

    Samadi, Saeed

    2013-11-08T23:59:59.000Z

    reliability evaluation of generation systems including Photovoltaic (PV) and Concentrated Solar Power (CSP) plants. Unit models of PV and CSP are developed first, and then generation system model is constructed to evaluate the reliability of generation systems...

  2. ORNL/TM-2004/91 MEASUREMENT PRACTICES FOR RELIABILITY

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    ................................................................................... 4 4. Loss of Load Probability: A Historical Perspective ................................................................................. 8 6. Pitfalls in Methods for Reliability Index Calculation............................................................ 27 C. Activities and Organizations Developing and Sharing Information on Reliability and Power

  3. Reliability as a measure of transportation system performance

    E-Print Network [OSTI]

    Jackson, Dena Delise

    2000-01-01T23:59:59.000Z

    This investigation involved a comparative analysis to assess the quantitative and qualitative characteristics of seven previously proposed methods of measuring travel time reliability. For each method, reliability was calculated using a l2-week...

  4. Gearbox Reliability Collaborative - Phase 1 and 2 Overview (Presentation)

    SciTech Connect (OSTI)

    Link, H.

    2011-08-01T23:59:59.000Z

    The presentation given at the Wind Turbine Reliability Workshop at Sandia National Laboratories, August 2-3, 2011, serves as an overview for the findings from the Gearbox Reliability Collaborative Project Report: Findings from Phase 1 and Phase 2 Testing

  5. Reliability of the generation supply in an interconnected power system

    E-Print Network [OSTI]

    Holditch, Damon Will

    1967-01-01T23:59:59.000Z

    method of calculating generation supply reliability was first described by Calabrese. This method has been expanded and refined by numerous other authors. The reliability figure of meri. t usually calculated using Calabrese's method is called loss...

  6. Ensuring the Availability and Reliability of Urea Dosing For...

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

    Ensuring the Availability and Reliability of Urea Dosing For On-Road and Non-Road Ensuring the Availability and Reliability of Urea Dosing For On-Road and Non-Road 2003 DEER...

  7. actions human reliability: Topics by E-print Network

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

    reliability is not easy Paris-Sud XI, Universit de 171 Software Reliability Using SPC and Weibull Order Statistics CiteSeer Summary: Control charts are widely used for...

  8. Energy Department Invests Over $10 Million to Improve Grid Reliability...

    Energy Savers [EERE]

    10 Million to Improve Grid Reliability and Resiliency Energy Department Invests Over 10 Million to Improve Grid Reliability and Resiliency June 11, 2014 - 6:20pm Addthis NEWS...

  9. Composite System based Multi-Area Reliability Evaluation

    E-Print Network [OSTI]

    Nagarajan, Ramya

    2011-02-22T23:59:59.000Z

    of such systems. Multi - area reliability evaluation is typically done by considering equivalent tie lines between different areas in an integrated power system. It gives approximate results for the reliability indices of a power system as it models each...

  10. Continuous Reliability Enhancement for Wind (CREW) database : wind plant reliability benchmark.

    SciTech Connect (OSTI)

    Hines, Valerie Ann-Peters; Ogilvie, Alistair B.; Bond, Cody R.

    2013-09-01T23:59:59.000Z

    To benchmark the current U.S. wind turbine fleet reliability performance and identify the major contributors to component-level failures and other downtime events, the Department of Energy funded the development of the Continuous Reliability Enhancement for Wind (CREW) database by Sandia National Laboratories. This report is the third annual Wind Plant Reliability Benchmark, to publically report on CREW findings for the wind industry. The CREW database uses both high resolution Supervisory Control and Data Acquisition (SCADA) data from operating plants and Strategic Power Systems' ORAPWind%C2%AE (Operational Reliability Analysis Program for Wind) data, which consist of downtime and reserve event records and daily summaries of various time categories for each turbine. Together, these data are used as inputs into CREW's reliability modeling. The results presented here include: the primary CREW Benchmark statistics (operational availability, utilization, capacity factor, mean time between events, and mean downtime); time accounting from an availability perspective; time accounting in terms of the combination of wind speed and generation levels; power curve analysis; and top system and component contributors to unavailability.

  11. Final report on reliability and lifetime prediction.

    SciTech Connect (OSTI)

    Gillen, Kenneth Todd; Wise, Jonathan; Jones, Gary D.; Causa, Al G. [Goodyear Tire and Rubber Co., Akron, OH; Terrill, Edward R. [Goodyear Tire and Rubber Co., Akron, OH; Borowczak, Marc [Goodyear Tire and Rubber Co., Akron, OH

    2012-12-01T23:59:59.000Z

    This document highlights the important results obtained from the subtask of the Goodyear CRADA devoted to better understanding reliability of tires and to developing better lifetime prediction methods. The overall objective was to establish the chemical and physical basis for the degradation of tires using standard as well as unique models and experimental techniques. Of particular interest was the potential application of our unique modulus profiling apparatus for assessing tire properties and for following tire degradation. During the course of this complex investigation, extensive relevant information was generated, including experimental results, data analyses and development of models and instruments. Detailed descriptions of the findings are included in this report.

  12. The quantitative failure of human reliability analysis

    SciTech Connect (OSTI)

    Bennett, C.T.

    1995-07-01T23:59:59.000Z

    This philosophical treatise argues the merits of Human Reliability Analysis (HRA) in the context of the nuclear power industry. Actually, the author attacks historic and current HRA as having failed in informing policy makers who make decisions based on risk that humans contribute to systems performance. He argues for an HRA based on Bayesian (fact-based) inferential statistics, which advocates a systems analysis process that employs cogent heuristics when using opinion, and tempers itself with a rational debate over the weight given subjective and empirical probabilities.

  13. Granite Reliable Power | 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 Jump to: navigation, search OpenEI ReferenceJump to: navigation,II Wind Farm JumpReliable Power Jump

  14. Microsoft Word - Pv Reliability Paper.doc

    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 82981-1cnHighandSWPA / SPRA / USACE LMI-EFRCAddendumNo. 1 Contract0 1RELIABILITY AND

  15. Photovoltaic Module Reliability Workshop 2013: February 26-27, 2013

    SciTech Connect (OSTI)

    Kurtz, S.

    2013-10-01T23:59:59.000Z

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  16. Photovoltaic Module Reliability Workshop 2010: February 18-19, 2010

    SciTech Connect (OSTI)

    Kurtz, J.

    2013-11-01T23:59:59.000Z

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  17. Photovoltaic Module Reliability Workshop 2011: February 16-17, 2011

    SciTech Connect (OSTI)

    Kurtz, S.

    2013-11-01T23:59:59.000Z

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  18. ELECTROMECHANICAL RELIABILITY TESTING OF THREE-AXIAL SILICON FORCE SENSORS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , available automatic test equipment for integrated circuits (ICs) can be leveraged [2]. The reliabilityELECTROMECHANICAL RELIABILITY TESTING OF THREE-AXIAL SILICON FORCE SENSORS S. Spinner1,2, J the measurement results. 1. INTRODUCTION The reliability of microelectromechanical systems (MEMS) receives growing

  19. Reliability-Centric High-Level Synthesis , N. Mansouri

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    critical applications, poor reliability can be catastrophic in terms of both human and equipment cost1 Reliability-Centric High-Level Synthesis S. Tosun , N. Mansouri , E. Arvas , M. Kandemir-down. As a result, it is becoming necessary to treat reliability as a first-class citizen in system design

  20. Design Strategy for a Formally Verified Reliable Computing Platform

    E-Print Network [OSTI]

    Butler, Ricky W.

    must demonstrate that these systems meet stringent reliability requirements. Flight critical components the manu­ facturing of electronic devices with failure rates low enough to meet the reliability of the system in the presence of component failures. The first task must therefore cal­ culate the reliability

  1. Photovoltaic Module Reliability Workshop 2014: February 25-26, 2014

    SciTech Connect (OSTI)

    Kurtz, S.

    2014-02-01T23:59:59.000Z

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  2. Estimation of Photovoltaic System Reliability and Performance Metrics

    E-Print Network [OSTI]

    Liberzon, Daniel

    1 Estimation of Photovoltaic System Reliability and Performance Metrics Sairaj V. Dhople, Student reliability and perfor- mance analysis of grid-tied photovoltaic (PV) systems is for- mulated using Markov and energy yield, and reliability metrics such as availability. The paper also provides an analytical method

  3. Photovoltaic Module Reliability Workshop 2012: February 28 - March 1, 2012

    SciTech Connect (OSTI)

    Kurtz, S.

    2013-11-01T23:59:59.000Z

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  4. Guest Editorial: Special Issue on Reliable Distributed Systems

    E-Print Network [OSTI]

    Firenze, Università degli Studi di

    Guest Editorial: Special Issue on Reliable Distributed Systems Shambhu J. Upadhyaya, Senior Member, designers, and implementers of distributed systems, with emphasis on system properties such as reliability with the 19th IEEE Symposium on Reliable Distributed Systems held at Nuernberg, Germany, 2000, but the topics

  5. Bayesian Networks and Evidence Theory to Model Complex Systems Reliability

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , infrastructure of water distribution or electricity. The reliability studies of such systems are consequentlyBayesian Networks and Evidence Theory to Model Complex Systems Reliability Ch. SIMON, Ph. WEBER, E.levrat}@cran.uhp-nancy.fr Abstract-- This paper deals with the use of Bayesian Net- works to compute system reliability of complex

  6. Using wind plant data to increase reliability.

    SciTech Connect (OSTI)

    Peters, Valerie A. (Sandia National Laboratories, Livermore, CA); Ogilvie, Alistair B.; McKenney, Bridget L.

    2011-01-01T23:59:59.000Z

    Operators interested in improving reliability should begin with a focus on the performance of the wind plant as a whole. To then understand the factors which drive individual turbine performance, which together comprise the plant performance, it is necessary to track a number of key indicators. Analysis of these key indicators can reveal the type, frequency, and cause of failures and will also identify their contributions to overall plant performance. The ideal approach to using data to drive good decisions includes first determining which critical decisions can be based on data. When those required decisions are understood, then the analysis required to inform those decisions can be identified, and finally the data to be collected in support of those analyses can be determined. Once equipped with high-quality data and analysis capabilities, the key steps to data-based decision making for reliability improvements are to isolate possible improvements, select the improvements with largest return on investment (ROI), implement the selected improvements, and finally to track their impact.

  7. Real Time Grid Reliability Management 2005

    SciTech Connect (OSTI)

    Eto, Joe; Eto, Joe; Lesieutre, Bernard; Lewis, Nancy Jo; Parashar, Manu

    2008-07-07T23:59:59.000Z

    The increased need to manage California?s electricity grid in real time is a result of the ongoing transition from a system operated by vertically-integrated utilities serving native loads to one operated by an independent system operator supporting competitive energy markets. During this transition period, the traditional approach to reliability management -- construction of new transmission lines -- has not been pursued due to unresolved issues related to the financing and recovery of transmission project costs. In the absence of investments in new transmission infrastructure, the best strategy for managing reliability is to equip system operators with better real-time information about actual operating margins so that they can better understand and manage the risk of operating closer to the edge. A companion strategy is to address known deficiencies in offline modeling tools that are needed to ground the use of improved real-time tools. This project: (1) developed and conducted first-ever demonstrations of two prototype real-time software tools for voltage security assessment and phasor monitoring; and (2) prepared a scoping study on improving load and generator response models. Additional funding through two separate subsequent work authorizations has already been provided to build upon the work initiated in this project.

  8. Reliability of dynamic systems under limited information.

    SciTech Connect (OSTI)

    Field, Richard V., Jr. (.,; .); Grigoriu, Mircea

    2006-09-01T23:59:59.000Z

    A method is developed for reliability analysis of dynamic systems under limited information. The available information includes one or more samples of the system output; any known information on features of the output can be used if available. The method is based on the theory of non-Gaussian translation processes and is shown to be particularly suitable for problems of practical interest. For illustration, we apply the proposed method to a series of simple example problems and compare with results given by traditional statistical estimators in order to establish the accuracy of the method. It is demonstrated that the method delivers accurate results for the case of linear and nonlinear dynamic systems, and can be applied to analyze experimental data and/or mathematical model outputs. Two complex applications of direct interest to Sandia are also considered. First, we apply the proposed method to assess design reliability of a MEMS inertial switch. Second, we consider re-entry body (RB) component vibration response during normal re-entry, where the objective is to estimate the time-dependent probability of component failure. This last application is directly relevant to re-entry random vibration analysis at Sandia, and may provide insights on test-based and/or model-based qualification of weapon components for random vibration environments.

  9. Adhesion and Thin-Film Module Reliability

    SciTech Connect (OSTI)

    McMahon, T. J.; Jorgenson, G. J.

    2006-01-01T23:59:59.000Z

    Among the infrequently measured but essential properties for thin-film (T-F) module reliability are the interlayer adhesion and cohesion within a layer. These can be cell contact layers to glass, contact layers to the semiconductor, encapsulant to cell, glass, or backsheet, etc. We use an Instron mechanical testing unit to measure peel strengths at 90deg or 180deg and, in some cases, a scratch and tape pull test to evaluate inter-cell layer adhesion strengths. We present peel strength data for test specimens laminated from the three T-F technologies, before and after damp heat, and in one instance at elevated temperatures. On laminated T-F cell samples, failure can occur uniformly at any one of the many interfaces, or non-uniformly across the peel area at more than one interface. Some peel strengths are Lt1 N/mm. This is far below the normal ethylene vinyl acetate/glass interface values of >10 N/mm. We measure a wide range of adhesion strengths and suggest that adhesion measured under higher temperature and relative humidity conditions is more relevant for module reliability.

  10. On the possibility of using models of reliability theory for technical systems to investigate the reliability of energy systems

    SciTech Connect (OSTI)

    Rudenko, Yu.N.; Ushakov, I.A.

    1984-01-01T23:59:59.000Z

    Certain features of mathematical models of energy-system reliability are analyzed. Mathematical models employed in reliability theory for technical systems are considered together with the possibility of modifying them for use in the solution of problems associated with ensuring the reliability of energy systems.

  11. Time, energy & form

    E-Print Network [OSTI]

    McInnis, Martha Jane

    1982-01-01T23:59:59.000Z

    Physical manifestations of time occur in natural forms of all sizes. Architectural form serves as shelter while providing a built envelope of human life, simultaneously influencing and influenced by energetic activities ...

  12. ECE 111 and 118 ENGINEERING DESIGN PROJECT DESCRIPTION FORM

    E-Print Network [OSTI]

    Fainman, Yeshaiahu

    . It is a decision-making process (often iterative), in which the basic sciences and mathematics and engineering, such as economic factors, safety, reliability, aesthetics, ethics, and social impact. (Electrical EngineeringECE 111 and 118 ENGINEERING DESIGN PROJECT DESCRIPTION FORM Specifications for the Design Course

  13. Review of Quantitative Software Reliability Methods

    SciTech Connect (OSTI)

    Chu, T.L.; Yue, M.; Martinez-Guridi, M.; Lehner, J.

    2010-09-17T23:59:59.000Z

    The current U.S. Nuclear Regulatory Commission (NRC) licensing process for digital systems rests on deterministic engineering criteria. In its 1995 probabilistic risk assessment (PRA) policy statement, the Commission encouraged the use of PRA technology in all regulatory matters to the extent supported by the state-of-the-art in PRA methods and data. Although many activities have been completed in the area of risk-informed regulation, the risk-informed analysis process for digital systems has not yet been satisfactorily developed. Since digital instrumentation and control (I&C) systems are expected to play an increasingly important role in nuclear power plant (NPP) safety, the NRC established a digital system research plan that defines a coherent set of research programs to support its regulatory needs. One of the research programs included in the NRC's digital system research plan addresses risk assessment methods and data for digital systems. Digital I&C systems have some unique characteristics, such as using software, and may have different failure causes and/or modes than analog I&C systems; hence, their incorporation into NPP PRAs entails special challenges. The objective of the NRC's digital system risk research is to identify and develop methods, analytical tools, and regulatory guidance for (1) including models of digital systems into NPP PRAs, and (2) using information on the risks of digital systems to support the NRC's risk-informed licensing and oversight activities. For several years, Brookhaven National Laboratory (BNL) has worked on NRC projects to investigate methods and tools for the probabilistic modeling of digital systems, as documented mainly in NUREG/CR-6962 and NUREG/CR-6997. However, the scope of this research principally focused on hardware failures, with limited reviews of software failure experience and software reliability methods. NRC also sponsored research at the Ohio State University investigating the modeling of digital systems using dynamic PRA methods. These efforts, documented in NUREG/CR-6901, NUREG/CR-6942, and NUREG/CR-6985, included a functional representation of the system's software but did not explicitly address failure modes caused by software defects or by inadequate design requirements. An important identified research need is to establish a commonly accepted basis for incorporating the behavior of software into digital I&C system reliability models for use in PRAs. To address this need, BNL is exploring the inclusion of software failures into the reliability models of digital I&C systems, such that their contribution to the risk of the associated NPP can be assessed.

  14. Methods of forming steel

    DOE Patents [OSTI]

    Branagan, Daniel J. (Iona, ID); Burch, Joseph V. (Shelley, ID)

    2001-01-01T23:59:59.000Z

    In one aspect, the invention encompasses a method of forming a steel. A metallic glass is formed and at least a portion of the glass is converted to a crystalline steel material having a nanocrystalline scale grain size. In another aspect, the invention encompasses another method of forming a steel. A molten alloy is formed and cooled the alloy at a rate which forms a metallic glass. The metallic glass is devitrified to convert the glass to a crystalline steel material having a nanocrystalline scale grain size. In yet another aspect, the invention encompasses another method of forming a steel. A first metallic glass steel substrate is provided, and a molten alloy is formed over the first metallic glass steel substrate to heat and devitrify at least some of the underlying metallic glass of the substrate.

  15. Investigation of the Role of Trap States in Solar Cell Reliability using Photothermal Deflection Spectroscopy

    E-Print Network [OSTI]

    Bezryadina, Anna Sergeyevna

    2012-01-01T23:59:59.000Z

    of PV materials Reliability of photovoltaic materials isof photovoltaic (PV) technologies. PV reliability andPhotovoltaic’s Properties and Characterization .. 9 1.5. Degradation and Reliability

  16. RELIABILITY CONSIDERATIONS OF ELECTRONICS COMPONENTS FOR THE DEEP UNDERWATER MUON AND NEUTRINO DETECTION SYSTEM

    E-Print Network [OSTI]

    Leskovar, B.

    2010-01-01T23:59:59.000Z

    to the designer of high-reliability equipment and systems.HDBK-217B, Reliability Prediction of Electronic Equipment,217B-Reliability Prediction of Electronic Equipment provides

  17. Joint first-passage probability, and reliability of systems under Stochastic excitation

    E-Print Network [OSTI]

    Song, J; Kiureghian, A D

    2006-01-01T23:59:59.000Z

    and reliability of electrical substation equipment andthe reliability of a system of interconnected equipmentthe reliability of a system of inter- connected equipment

  18. Radioisotope thermoelectric generator reliability and safety

    SciTech Connect (OSTI)

    Campbell, R.; Klein, J.

    1989-01-01T23:59:59.000Z

    There are numerous occasions when a planetary mission requires energy in remote areas of the solar system. Anytime power is required much beyond Mars or the Asteroid Belts, solar power is not an option. The radioisotope thermoelectric generator (RTG) was developed for such a mission requirement. It is a relatively small and lightweight power source that can produce power under adverse conditions. Just this type of source has become the backbone of the power system for far outer plant exploration. Voyagers I and II are utilizing RTGs, which will soon power the Galileo spacecraft to Jupiter and the Ulysses spacecraft to study the solar poles. The paper discusses RTG operation including thermoelectric design, converter design, general-purpose heat source; RTG reliability including design, testing, experience, and launch approval; and RTG safety issues and methods of ensuring safety.

  19. Advancing Usability Evaluation through Human Reliability Analysis

    SciTech Connect (OSTI)

    Ronald L. Boring; David I. Gertman

    2005-07-01T23:59:59.000Z

    This paper introduces a novel augmentation to the current heuristic usability evaluation methodology. The SPAR-H human reliability analysis method was developed for categorizing human performance in nuclear power plants. Despite the specialized use of SPAR-H for safety critical scenarios, the method also holds promise for use in commercial off-the-shelf software usability evaluations. The SPAR-H method shares task analysis underpinnings with human-computer interaction, and it can be easily adapted to incorporate usability heuristics as performance shaping factors. By assigning probabilistic modifiers to heuristics, it is possible to arrive at the usability error probability (UEP). This UEP is not a literal probability of error but nonetheless provides a quantitative basis to heuristic evaluation. When combined with a consequence matrix for usability errors, this method affords ready prioritization of usability issues.

  20. Nuclear Power - Control, Reliability and Human Factors 

    E-Print Network [OSTI]

    2011-01-01T23:59:59.000Z

    Instrumentation and Control 49 H.M. Hashemian Chapter 4 Design Considerations for the Implementation of a Mobile IP Telephony System in a Nuclear Power Plant 67 J. Garc?a-Hern?ndez, J. C. Vel?zquez- Hern?ndez, C. F. Garc?a-Hern?ndez and M. A. Vallejo-Alarc?n... Reliability K s e n i i a Sapoz h n i k o v a and Roald Tayma n o v D.I.Mendeleyev Institute for Metrology, Russia 1. Introduction At present, a great number of embedded sens o r devi c es provi d e monito r i n g of operat i n g condi t io n...

  1. Wind Power Reliability: Breaking Down a Barrier

    Broader source: Energy.gov [DOE]

    The steady increase of wind power on the grid presents new challenges for power system operators charged with making sure the grid stays up and running. "We need to ensure that we are going down a path that will lead to better reliability [with wind power]," said Bob Zavadil, an executive vice president at EnerNex Corporation in Knoxville, Tenn., a firm specializing in renewable energy grid interconnection and integration. "If this piece isn't done, there will be problems." EnerNex has spent the last decade perfecting wind turbine and plant models that test a wind plant's influence on the grid and its ability to provide grid support. In its latest effort, the company is using American Recovery and Reinvestment Act funds worth $750,000 to develop documentation and validations of computer wind turbine models.

  2. HUMAN RELIABILITY ANALYSIS FOR COMPUTERIZED PROCEDURES

    SciTech Connect (OSTI)

    Ronald L. Boring; David I. Gertman; Katya Le Blanc

    2011-09-01T23:59:59.000Z

    This paper provides a characterization of human reliability analysis (HRA) issues for computerized procedures in nuclear power plant control rooms. It is beyond the scope of this paper to propose a new HRA approach or to recommend specific methods or refinements to those methods. Rather, this paper provides a review of HRA as applied to traditional paper-based procedures, followed by a discussion of what specific factors should additionally be considered in HRAs for computerized procedures. Performance shaping factors and failure modes unique to computerized procedures are highlighted. Since there is no definitive guide to HRA for paper-based procedures, this paper also serves to clarify the existing guidance on paper-based procedures before delving into the unique aspects of computerized procedures.

  3. Categorical Exclusion Determination Form

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

    Form Proposed Action Title: (0471-1595) Regents of the University of Minnesota - Thermal Fuel: Solar Fuels via Partial Redox Cycles with Heat Recovery Program or Field...

  4. Partnership Agreement Form

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

    Partnership Agreement Form Learn more at energy.goveereamobetter-plants The Better Buildings, Better Plants Program is a national initiative to significantly improve energy...

  5. Load Response Fundamentally Matches Power System Reliability Requirements

    SciTech Connect (OSTI)

    Kirby, Brendan J [ORNL] [ORNL

    2007-01-01T23:59:59.000Z

    Responsive load is the most underutilized reliability resource available to the power system. Loads are frequently barred from providing the highest value and most critical reliability services; regulation and spinning reserve. Advances in communications and control technology now make it possible for some loads to provide both of these services. The limited storage incorporated in some loads better matches their response capabilities to the fast reliability-service markets than to the hourly energy markets. Responsive loads are frequently significantly faster and more accurate than generators, increasing power system reliability. Incorporating fast load response into microgrids further extends the reliability response capabilities that can be offered to the interconnected power system. The paper discusses the desired reliability responses, why this matches some loads' capabilities, what the advantages are for the power system, implications for communications and monitoring requirements, and how this resource can be exploited.

  6. 1992 annual report of the North American Electric Reliability Council

    SciTech Connect (OSTI)

    Not Available

    1992-01-01T23:59:59.000Z

    This report describes the operation and concerns of the North American Electric Reliability Council and contains contributions from each of its member regional councils concerning reliability of electric power in their representative areas. The topics of the reports include current and future electric system reliability, regional monitoring, planning, telecommunications, the generating availability data system, technical services available, installed capacity changes, equipment changes, unusual events, hurricane Andrew, and ice storms.

  7. Competition and Reliability in North American Energy Markets...

    Energy Savers [EERE]

    Issue Paper Synopses Jack Casazza, Frank Delea, and George Loehr argue that "deregulation and restructuring have had a devastating effect on the reliability of the North...

  8. Office of Electricity Delivery And Energy Reliability To Hold...

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

    Office of Electricity Delivery And Energy Reliability To Hold Technical Conference On The Design Of Future Electric Transmission Office of Electricity Delivery And Energy...

  9. applying software reliability: Topics by E-print Network

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

    12;The US Space Shuttle Feitelson, Dror 6 Aarhus Universitet Reliable Software and Architecture Computer Technologies and Information Sciences Websites Summary: Aarhus Universitet...

  10. Sandia Energy - Reliability, O&M, Standards Development

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

    and reduce performance risks and costs. With elements of reliability and performance engineering, this work can leverage the knowledge of DOE researchers and the results of...

  11. Imprecise reliability by evidential networks Christophe SIMON and Philippe WEBER

    E-Print Network [OSTI]

    Boyer, Edmond

    Imprecise reliability by evidential networks Christophe SIMON and Philippe WEBER October 3, 2008 to adequately tell variability from imprecision. Many representations exist C. Simon and Ph. Weber

  12. NREL Gearbox Reliability Collaborative Analysis Round Robin: Preprint

    SciTech Connect (OSTI)

    Oyague, F.; Butterfield, C. P.; Sheng, S.

    2009-05-01T23:59:59.000Z

    The Gearbox Reliability Collaborative is working to determine the causes and loading conditions that result in the premature failure of wind turbine gearboxes.

  13. Microsoft PowerPoint - Sandia Inverter Systemic Reliability Presentati...

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

    Copyright 2013, First Solar, Inc. 2 Topic Review * First Solar Plant & Location Overview * Overview of Reliability * Component Review * 'Soft' Failures Review Copyright 2013,...

  14. Power Electronics Reliability Kick Off Meeting ? Silicon Power...

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

    Validated Through Broad Use Boating Defense Machine Tool Wind Energy Semiconductors Health Care 2 Project Goals * Better understand the current and future reliability of...

  15. On the Reliability of System Identification: Applications of Bootstrap Theory

    E-Print Network [OSTI]

    Kareem, Ahsan

    1 On the Reliability of System Identification: Applications of Bootstrap Theory T. Kijewski & A of Notre Dame, Notre Dame, IN, USA Keywords: bootstrapping, system identification, Monte Carlo, damping

  16. advance capability reliability: Topics by E-print Network

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

    future employees with the strategic business objectives. Jussi Stader; Ann Macintosh 1999-01-01 48 PLPD: reliable protein localization prediction from imbalanced and overlapped...

  17. Sandia National Laboratories: assess PV system reliability issues

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

    system reliability issues Solar Regional Test Center in Vermont Achieves Milestone Installation On September 23, 2014, in Concentrating Solar Power, Energy, Facilities, National...

  18. Project Profile: Physics-Based Reliability Models for Supercritical...

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

    developed models to predict the reliability of hybrid gas bearing (HGB) and dry gas seal (DGS) components in the turboexpander of a supercritical CO2 turbine. The...

  19. architecture reliability analysis: Topics by E-print Network

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

    Henrik Brbak 4 Global methodology in control architecture to improve mobile robot reliability Physics Websites Summary: Global methodology in control architecture to...

  20. Gearbox Reliability Collaborative Experimental Data Overview & Analysis (Presentation)

    SciTech Connect (OSTI)

    Oyague, F.

    2010-05-01T23:59:59.000Z

    This presentation details how wind turbine gearboxes fail to meet 20-year design life and how the Gearbox Reliability Collaborative (GRC) is addressing the challenges.

  1. Thermal Stress and Reliability for Advanced Power Electronics...

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

    More Documents & Publications Thermal Stress and Reliability for Advanced Power Electronics and Electric Machines Power Electronic Thermal System Performance and Integration...

  2. Office of Electricity Delivery and Energy Reliability | Department...

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

    & Internships Funding Opportunities Information Center Contact Us Energy.gov Office of Electricity Delivery & Energy Reliability 1000 Independence Avenue, SW Washington, DC...

  3. Smart Grid: Creating Jobs while Delivering Reliable,Environmentally...

    Open Energy Info (EERE)

    Smart Grid: Creating Jobs while Delivering Reliable, Environmentally-friendly Energy Home > Groups > OpenEI Community Central Graham7781's picture Submitted by Graham7781(2017)...

  4. Electro-thermal-mechanical Simulation and Reliability for Plug...

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

    Peer Evaluation Meeting ape026hefner2012o.pdf More Documents & Publications Electro-thermal-mechanical Simulation and Reliability for Plug-in Vehicle Converters and Inverters...

  5. Sandia National Laboratories: very high solar energy reliability

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

    reliability ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid...

  6. Method of forming nanodielectrics

    DOE Patents [OSTI]

    Tuncer, Enis [Knoxville, TN; Polyzos, Georgios [Oak Ridge, TN

    2014-01-07T23:59:59.000Z

    A method of making a nanoparticle filled dielectric material. The method includes mixing nanoparticle precursors with a polymer material and reacting the nanoparticle mixed with the polymer material to form nanoparticles dispersed within the polymer material to form a dielectric composite.

  7. Gearbox Reliability Collaborative Project Report: Findings from Phase 1 and Phase 2 Testing

    SciTech Connect (OSTI)

    Link, H.; LaCava, W.; van Dam, J.; McNiff, B.; Sheng, S.; Wallen, R.; McDade, M.; Lambert, S.; Butterfield, S.; Oyague, F.

    2011-06-01T23:59:59.000Z

    This report describes the Gearbox Reliability Collaborative's work at NREL to increase the reliability of wind turbine gearboxes.

  8. Method for forming materials

    DOE Patents [OSTI]

    Tolle, Charles R. (Idaho Falls, ID); Clark, Denis E. (Idaho Falls, ID); Smartt, Herschel B. (Idaho Falls, ID); Miller, Karen S. (Idaho Falls, ID)

    2009-10-06T23:59:59.000Z

    A material-forming tool and a method for forming a material are described including a shank portion; a shoulder portion that releasably engages the shank portion; a pin that releasably engages the shoulder portion, wherein the pin defines a passageway; and a source of a material coupled in material flowing relation relative to the pin and wherein the material-forming tool is utilized in methodology that includes providing a first material; providing a second material, and placing the second material into contact with the first material; and locally plastically deforming the first material with the material-forming tool so as mix the first material and second material together to form a resulting material having characteristics different from the respective first and second materials.

  9. Computational Thermochemistry and Benchmarking of Reliable Methods

    SciTech Connect (OSTI)

    Feller, David F.; Dixon, David A.; Dunning, Thom H.; Dupuis, Michel; McClemore, Doug; Peterson, Kirk A.; Xantheas, Sotiris S.; Bernholdt, David E.; Windus, Theresa L.; Chalasinski, Grzegorz; Fosada, Rubicelia; Olguim, Jorge; Dobbs, Kerwin D.; Frurip, Donald; Stevens, Walter J.; Rondan, Nelson; Chase, Jared M.; Nichols, Jeffrey A.

    2006-06-20T23:59:59.000Z

    During the first and second years of the Computational Thermochemistry and Benchmarking of Reliable Methods project, we completed several studies using the parallel computing capabilities of the NWChem software and Molecular Science Computing Facility (MSCF), including large-scale density functional theory (DFT), second-order Moeller-Plesset (MP2) perturbation theory, and CCSD(T) calculations. During the third year, we continued to pursue the computational thermodynamic and benchmarking studies outlined in our proposal. With the issues affecting the robustness of the coupled cluster part of NWChem resolved, we pursued studies of the heats-of-formation of compounds containing 5 to 7 first- and/or second-row elements and approximately 10 to 14 hydrogens. The size of these systems, when combined with the large basis sets (cc-pVQZ and aug-cc-pVQZ) that are necessary for extrapolating to the complete basis set limit, creates a formidable computational challenge, for which NWChem on NWMPP1 is well suited.

  10. Individual Differences in Human Reliability Analysis

    SciTech Connect (OSTI)

    Jeffrey C. Joe; Ronald L. Boring

    2014-06-01T23:59:59.000Z

    While human reliability analysis (HRA) methods include uncertainty in quantification, the nominal model of human error in HRA typically assumes that operator performance does not vary significantly when they are given the same initiating event, indicators, procedures, and training, and that any differences in operator performance are simply aleatory (i.e., random). While this assumption generally holds true when performing routine actions, variability in operator response has been observed in multiple studies, especially in complex situations that go beyond training and procedures. As such, complexity can lead to differences in operator performance (e.g., operator understanding and decision-making). Furthermore, psychological research has shown that there are a number of known antecedents (i.e., attributable causes) that consistently contribute to observable and systematically measurable (i.e., not random) differences in behavior. This paper reviews examples of individual differences taken from operational experience and the psychological literature. The impact of these differences in human behavior and their implications for HRA are then discussed. We propose that individual differences should not be treated as aleatory, but rather as epistemic. Ultimately, by understanding the sources of individual differences, it is possible to remove some epistemic uncertainty from analyses.

  11. Reliability Testing of Polysilicon For MEMs Devices

    SciTech Connect (OSTI)

    LaVan, D.A.; Buchheit, T.E.

    1999-04-05T23:59:59.000Z

    Mission critical applications of MEMS devices require knowledge of the distribution in their material properties and long-term reliability of the small-scale structures. This project reports on a new testing program at Sandia to quantify the strength distribution using samples that reflect the dimensions of critical MEMS components. The strength of polysilicon fabricated with Sandia's SUMMiT 4-layer process was successfully measured using samples with gage sections 2.5 {micro}m thick by 1.7 {micro}m wide and lengths of 15 and 25 {micro}m. These tensile specimens have a freely moving pivot on one end that anchors the sample to the silicon die and prevents off axis loading during testing. Each sample is loaded in uniaxial tension by pulling laterally with a flat tipped diamond in a computer-controlled Nanoindenter. The stress-strain curve is calculated using the specimen cross section and gage length dimensions verified by measuring against a standard in the SEM. The first 48 samples had a means strength of 2.24 {+-} 0.35 GPa. Fracture strength measurements grouped into three strength levels, which matched three failure modes observed in post mortem examinations. The seven samples in the highest strength group failed in the gage section (strength of 2.77 {+-} 0.04 GPa), the moderate strength group failed at the gage section fillet and the lowest strength group failed at a dimple in the hub. With this technique, multiple tests can be programmed at one time and performed without operator assistance at a rate of 20-30 per day allowing the collection of significant populations of data. Since the new test geometry has been proven, the project is moving to test the distributions seen from real geometric features typical to MEMS such as the effect of gage length, fracture toughness, bonding between layers, etch holes, dimples and shear of gear teeth.

  12. Nuclear Decommissioning and Organisational Reliability: Involving Subcontractors in Collective Action

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Page 1 Nuclear Decommissioning and Organisational Reliability: Involving Subcontractors to the decommissioning. The use of subcontractors is not new; in the nuclear industry it became widespread in the 1990s reliability is at the heart of the safety of at-risk systems. Many studies have been conducted in the nuclear

  13. An Examination of Temporal Trends in Electricity Reliability Based on

    E-Print Network [OSTI]

    , national-scale information on the reliability of the U.S. electric power system is lacking. This report. In principle, comprehensive information on the actual reliability of the electric power system and on how January 2012 The work described in this report was funded by the Office of Electricity Delivery and Energy

  14. GPGPUs: How to Combine High Computational Power with High Reliability

    E-Print Network [OSTI]

    Gurumurthi, Sudhanva

    recent results derived from radiation experiments about the reliability of GPGPUs. Third, it describes of applications running on GPGPUs. Keywords--GPGPUs, reliability, HPC, fault injection, radiation experiments I their appearance on the market. Their very high computational power combined with low cost, reduced power

  15. Assessing the reliability of linear dynamic transformer thermal modelling

    E-Print Network [OSTI]

    Assessing the reliability of linear dynamic transformer thermal modelling X. Mao, D.J. Tylavsky and G.A. McCulla Abstract: Improving the utilisation of transformers requires that the hot-spot and top. An alternative method for assessing transformer model reliability is provided. 1 Introduction The maximally

  16. Consensus alignment server for reliable comparative modeling with distant templates

    E-Print Network [OSTI]

    Vajda, Sandor

    Consensus alignment server for reliable comparative modeling with distant templates Jahnavi C; Accepted April 26, 2004 ABSTRACT Consensus is a server developed to produce high- quality alignments different align- ment methods, the server produces a consensus alignment, with a reliability measure

  17. On Improving the Performance of Reliable Server Pooling Systems

    E-Print Network [OSTI]

    Dreibholz, Thomas

    On Improving the Performance of Reliable Server Pooling Systems for Distance-Sensitive Distributed, Germany, dreibh@iem.uni-due.de, http://www.exp-math.uni-essen.de/~dreibh Abstract. Reliable Server Pooling (RSerPool) is a protocol framework for server redundancy and session failover, currently under

  18. Improving the Load Balancing Performance of Reliable Server Pooling

    E-Print Network [OSTI]

    Dreibholz, Thomas

    Improving the Load Balancing Performance of Reliable Server Pooling in Heterogeneous Capacity@iem.uni-due.de Abstract. The IETF is currently standardizing a light-weight protocol frame- work for server redundancy and session failover: Reliable Server Pooling (RSer- Pool). It is the novel combination of ideas from

  19. Towards Reliable SubDivision of Geological Areas: Interval Approach

    E-Print Network [OSTI]

    Kreinovich, Vladik

    Towards Reliable Sub­Division of Geological Areas: Interval Approach David D. Coblentz 1;2 , Vladik difficult to produce a reliable subdivision. The subdivision of a geological zone into segments is often, and often, we do not have a statistically sufficient amount of thoroughly analyzed geological samples

  20. Towards Reliable SubDivision of Geological Areas: Interval Approach

    E-Print Network [OSTI]

    Kreinovich, Vladik

    Towards Reliable Sub­Division of Geological Areas: Interval Approach David D. Coblentz 1;2 , Vladik Difficult to Produce a Reliable Subdivision The subdivision of a geological zone into segments is often the area, and often, we do not have a statistically sufficient amount of thoroughly analyzed geological

  1. Gearbox Reliability Collaborative High Speed Shaft Tapered Roller Bearing Calibration

    SciTech Connect (OSTI)

    Keller, J.; Guo, Y.; McNiff, B.

    2013-10-01T23:59:59.000Z

    The National Renewable Energy Laboratory (NREL) Gearbox Reliability Collaborative (GRC) is a project investigating gearbox reliability primarily through testing and modeling. Previous dynamometer testing focused upon acquiring measurements in the planetary section of the test gearbox. Prior to these tests, the strain gages installed on the planetary bearings were calibrated in a load frame.

  2. MARKETS FOR REACTIVE POWER AND RELIABILITY: A WHITE PAPER

    E-Print Network [OSTI]

    1 MARKETS FOR REACTIVE POWER AND RELIABILITY: A WHITE PAPER Engineering and Economics of Electricity Research Group (E3 RG) CORNELL UNIVERSITY E3 RG contributing authors: Robert Thomas, Director the Consortium for Electric Reliability Technology Solutions (CERTS) and in part by the National Science

  3. PSFQ: A Reliable Transport Protocol for Wireless Sensor Networks

    E-Print Network [OSTI]

    Han, Richard Y.

    PSFQ: A Reliable Transport Protocol for Wireless Sensor Networks Chieh-Yih Wan Dept. of Electrical class of reliable data applications emerging in wireless sensor networks. For example, currently sensor of sensors in wireless sensor networks on the fly (e.g., during disaster recovery). Due to the application

  4. Separating myths from reality in PV inverter reliability

    E-Print Network [OSTI]

    Rollins, Andrew M.

    Separating myths from reality in PV inverter reliability Or, How I learned to stop worrying: Navigant Consulting report to NREL on PV inverter status. NCI found that inverters were limited by 18 and love the BOM Timothy J. Peshek SDLE Reliability workshop, CWRU 4/9/2012 #12;What inverter manufacturers

  5. IEEE TRANSACTIONS ON RELIABILITY 1 Optimal Maintenance Strategies for Wind

    E-Print Network [OSTI]

    Ntaimo, Lewis

    from sensors, our research objective is to derive an optimal observation and preventive maintenance TRANSACTIONS ON RELIABILITY 3 ACRONYMS NA no action PM preventive maintenance OB observation CM correctiveIEEE TRANSACTIONS ON RELIABILITY 1 Optimal Maintenance Strategies for Wind Turbine Systems Under

  6. Reducing Complexity and Improving the Reliability of Frequency Reconfigurable Antennas

    E-Print Network [OSTI]

    the desired performance. In this paper, we minimize the number of electronic components used to reconfigureReducing Complexity and Improving the Reliability of Frequency Reconfigurable Antennas J-- In this paper the complexity and reliability of frequency reconfigurable antennas are presented. A new approach

  7. Review Article Gate-Level Circuit Reliability Analysis: A Survey

    E-Print Network [OSTI]

    Chen, Chunhong

    electronic components (such as single electron devices) have demonstrated their nondeterministic characReview Article Gate-Level Circuit Reliability Analysis: A Survey Ran Xiao and Chunhong Chen. Circuit reliability has become a growing concern in today's nanoelectronics, which motivates strong

  8. Issue Papers on Reliability and Competition Thomas August 2005

    E-Print Network [OSTI]

    Electric Power Industry Restructuring and Grid Reliability Robert J. Thomas, Professor School of Electrical and Computer Engineering, Cornell University Introduction Electric power in the U.S. is a more than $250). The electricity system is a critical infrastructure; its continued and reliable functioning is essential

  9. A Reliable method for Blind Channel Identification using Burst Data

    E-Print Network [OSTI]

    Raphaeli, Dan

    1 A Reliable method for Blind Channel Identification using Burst Data Dan Raphaeli, Senior Member Output (MISO) FIR channels with nonminimum phase. The approach is based on mini- mizing a cost function of identification success when consider- ing statistical channels, its ability to obtain reliable channel estimates

  10. Reliability of Heterogeneous Distributed Computing Systems in the Presence

    E-Print Network [OSTI]

    Hayat, Majeed M.

    Reliability of Heterogeneous Distributed Computing Systems in the Presence of Correlated Failures of distributed-computing systems (DCSs) has been widely studied under the assumption that computing elements (CEs of correlated failures are also investigated. Index Terms--Distributed computing, load balancing, reliability

  11. Dynamically Quantifying and Improving the Reliability of Distributed Storage Systems

    E-Print Network [OSTI]

    Bianchini, Ricardo

    Dynamically Quantifying and Improving the Reliability of Distributed Storage Systems Rekha Bachwani-scale storage systems can be significantly improved by using bet- ter reliability metrics and more efficient on a distributed storage system based on erasure codes. We find that MinI improves relia- bility significantly

  12. ContentsContents4466Reliability and quality control

    E-Print Network [OSTI]

    Vickers, James

    outcomes You will first learn about the importance of the concept of reliability applied to systems such things as maintenance and part replacement schedules, whole system replacements and reliability testing systems understand the relationship between the Weibull distribution and the exponential distribution #12

  13. Maximizing Service Reliability in Distributed Computing Systems with Random Node

    E-Print Network [OSTI]

    Hayat, Majeed M.

    Maximizing Service Reliability in Distributed Computing Systems with Random Node Failures: Theory Member, IEEE Abstract--In distributed computing systems (DCSs) where server nodes can fail permanently with nonzero probability, the system performance can be assessed by means of the service reliability, defined

  14. A summary of North American HVDC converter station reliability specifications

    SciTech Connect (OSTI)

    Vancers, I. (ABB Power Systems Inc., Los Angeles, CA (United States)); Hormozi, F.J. (Los Angeles Dept. of Water and Power, CA (United States))

    1993-07-01T23:59:59.000Z

    This paper summarizes Reliability, Availability, and Maintainability (RAM) specifications that were issued for thyristor based HVDC converter stations in service in North America. A total of twenty project specifications are summarized. A detailed summary by project is shown with specific quantitative requirements categorized. Definitions of terms, representative design principles, and formulas used in calculating RAM parameters contained in existing reliability specifications are presented.

  15. RELIABILITY COMPARISON MODELS FOR OFFSHORE WIND TURBINES (OWT)

    E-Print Network [OSTI]

    Bernstein, Joseph B.

    RELIABILITY COMPARISON MODELS FOR OFFSHORE WIND TURBINES (OWT) Yizhou Lu, T. M. Delorm, A. Christou of survivor functions R(t) of drive-trains, after 1 year of operation, between Offshore Wind Turbine (OWT) vs of the reliability of these 5 Types Surrogate failure rate data Onshore wind turbines (OT) 1-1.5MW CONCLUSIONS

  16. Introduction to differential forms

    E-Print Network [OSTI]

    2015-03-08T23:59:59.000Z

    section 8) if it has a potential energy function. In terms of differential forms, F is conservative precisely when F1dx + F2dy is exact. 3 Parametric curves.

  17. Electromagetic proton form factors

    E-Print Network [OSTI]

    M Y Hussein

    2006-10-31T23:59:59.000Z

    The electromagnetic form factors are crucial to our understanding of the proton internal structure, and thus provide a strong constraint of the distributions of the charge and magnetization current within the proton. We adopted the quark-parton model for calculating and understanding the charge structure of the proton interms of the electromagnetic form factors. A remarkable agreement with the available experimental evidence is found.

  18. Wind turbine reliability : a database and analysis approach.

    SciTech Connect (OSTI)

    Linsday, James (ARES Corporation); Briand, Daniel; Hill, Roger Ray; Stinebaugh, Jennifer A.; Benjamin, Allan S. (ARES Corporation)

    2008-02-01T23:59:59.000Z

    The US wind Industry has experienced remarkable growth since the turn of the century. At the same time, the physical size and electrical generation capabilities of wind turbines has also experienced remarkable growth. As the market continues to expand, and as wind generation continues to gain a significant share of the generation portfolio, the reliability of wind turbine technology becomes increasingly important. This report addresses how operations and maintenance costs are related to unreliability - that is the failures experienced by systems and components. Reliability tools are demonstrated, data needed to understand and catalog failure events is described, and practical wind turbine reliability models are illustrated, including preliminary results. This report also presents a continuing process of how to proceed with controlling industry requirements, needs, and expectations related to Reliability, Availability, Maintainability, and Safety. A simply stated goal of this process is to better understand and to improve the operable reliability of wind turbine installations.

  19. Systems reliability analysis for the national ignition facility

    SciTech Connect (OSTI)

    Majumdar, K.C.; Annese, C.E.; MacIntyre, A.T.; Sicherman, A.

    1996-06-12T23:59:59.000Z

    A Reliability, Availability and Maintainability (RAM) analysis was initiated for the National Ignition Facility (NIF). The NIF is an inertial confinement fusion research facility designed to achieve controlled thermonuclear reaction; the preferred site for the NIF is the Lawrence Livermore National Laboratory (LLNL). The NIF RAM analysis has three purposes: (1) to allocate top level reliability and availability goals for the systems, (2) to develop an operability model for optimum maintainability, and (3) to determine the achievability of the allocated goals of the RAM parameters for the NIF systems and the facility operation as a whole. An allocation model assigns the reliability and availability goals for front line and support systems by a top-down approach; reliability analysis uses a bottom-up approach to determine the system reliability and availability from component level to system level.

  20. CERTS: Consortium for Electric Reliability Technology Solutions - Research Highlights

    SciTech Connect (OSTI)

    Eto, Joseph

    2003-07-30T23:59:59.000Z

    Historically, the U.S. electric power industry was vertically integrated, and utilities were responsible for system planning, operations, and reliability management. As the nation moves to a competitive market structure, these functions have been disaggregated, and no single entity is responsible for reliability management. As a result, new tools, technologies, systems, and management processes are needed to manage the reliability of the electricity grid. However, a number of simultaneous trends prevent electricity market participants from pursuing development of these reliability tools: utilities are preoccupied with restructuring their businesses, research funding has declined, and the formation of Independent System Operators (ISOs) and Regional Transmission Organizations (RTOs) to operate the grid means that control of transmission assets is separate from ownership of these assets; at the same time, business uncertainty, and changing regulatory policies have created a climate in which needed investment for transmission infrastructure and tools for reliability management has dried up. To address the resulting emerging gaps in reliability R&D, CERTS has undertaken much-needed public interest research on reliability technologies for the electricity grid. CERTS' vision is to: (1) Transform the electricity grid into an intelligent network that can sense and respond automatically to changing flows of power and emerging problems; (2) Enhance reliability management through market mechanisms, including transparency of real-time information on the status of the grid; (3) Empower customers to manage their energy use and reliability needs in response to real-time market price signals; and (4) Seamlessly integrate distributed technologies--including those for generation, storage, controls, and communications--to support the reliability needs of both the grid and individual customers.

  1. Reliable Power, LLC (Massachusetts) | 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 History FacebookRegenesys Holdings Ltd Jump to:and TransferReliOn

  2. Reliable Power, LLC | 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 History FacebookRegenesys Holdings Ltd Jump to:and

  3. E L S E V I E R Reliability Engineering and System Safety 70 (2000)29-39 RELIABILITY

    E-Print Network [OSTI]

    Sommerville, Ian

    2000-01-01T23:59:59.000Z

    -boardcomputer system in place of a driver to control the hydraulics and thereforethe machine.It is being developedwithE L S E V I E R Reliability Engineering and System Safety 70 (2000)29-39 RELIABILITY ENGINEERING & SYSTEM SAFETY www.elsevier.com/locate/ress Safetyanalysisof autonomousexcavatorfunctionality D. Sewardu

  4. Forms | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you sure you want toworldPowerHome| Department ofForms Forms Engraving To

  5. Reliability worth assessment in a developing country - residential survey results

    SciTech Connect (OSTI)

    Billinton, R.; Pandey, M.

    1999-11-01T23:59:59.000Z

    This paper presents the results of a residential customer survey conducted in service areas of the Nepal Integrated Electric Power System (NPS). The objective was to determine the power interruption costs incurred by the residential customers of a developing country, and extend the customer survey approach to reliability worth evaluation in a developing environment. Interruption cost estimates were obtained using in-person interviews with 944 sample customers. The results indicate the implications of service reliability to residential customers of Nepal, and show that reliability worth evaluation in a developing country is both possible and practical.

  6. Reliable strain measurement in transistor arrays by robust scanning transmission electron microscopy

    SciTech Connect (OSTI)

    Kim, Suhyun; Kim, Joong Jung; Jung, Younheum; Lee, Kyungwoo; Byun, Gwangsun; Hwang, KyoungHwan; Lee, Sunyoung; Lee, Kyupil [Memory Analysis Science and Engineering Group, Samsung Electronics, San 16, Hwasung City, Gyeonggi-Do 445-701 (Korea, Republic of)] [Memory Analysis Science and Engineering Group, Samsung Electronics, San 16, Hwasung City, Gyeonggi-Do 445-701 (Korea, Republic of)

    2013-09-15T23:59:59.000Z

    Accurate measurement of the strain field in the channels of transistor arrays is critical for strain engineering in modern electronic devices. We applied atomic-resolution high-angle annular dark-field scanning transmission electron microscopy to quantitative measurement of the strain field in transistor arrays. The quantitative strain profile over 20 transistors was obtained with high reliability and a precision of 0.1%. The strain field was found to form homogeneously in the channels of the transistor arrays. Furthermore, strain relaxation due to the thin foil effect was quantitatively investigated for thicknesses of 35 to 275 nm.

  7. Development of a Reliable Fuel Depletion Methodology for the HTR-10 Spent Fuel Analysis

    SciTech Connect (OSTI)

    Chung, Kiwhan [Los Alamos National Laboratory; Beddingfield, David H. [Los Alamos National Laboratory; Geist, William H. [Los Alamos National Laboratory; Lee, Sang-Yoon [unaffiliated

    2012-07-03T23:59:59.000Z

    A technical working group formed in 2007 between NNSA and CAEA to develop a reliable fuel depletion method for HTR-10 based on MCNPX and to analyze the isotopic inventory and radiation source terms of the HTR-10 spent fuel. Conclusions of this presentation are: (1) Established a fuel depletion methodology and demonstrated its safeguards application; (2) Proliferation resistant at high discharge burnup ({approx}80 GWD/MtHM) - Unfavorable isotopics, high number of pebbles needed, harder to reprocess pebbles; (3) SF should remain under safeguards comparable to that of LWR; and (4) Diversion scenarios not considered, but can be performed.

  8. Request for Information: Photovoltaic Reliability and Durability Research and Development

    Broader source: Energy.gov [DOE]

    The United States Department of Energy (DOE) – Office of Energy Efficiency and Renewable Energy (EERE) seeks feedback from industry, academia, research laboratories, government agencies, and other stakeholders on issues related to solar photovoltaic (PV) reliability and durability research and development.

  9. Reliability and Geographic Trends of 50,000 Photovoltaic Systems...

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

    and reliability data from nearly 50,000 photovoltaic (PV) systems totaling 1.7 gigawatts installed capacity in the USA from 2009 to 2012 and their geographic trends. About 90% of...

  10. A reliability assessment methodology for distribution systems with distributed generation 

    E-Print Network [OSTI]

    Duttagupta, Suchismita Sujaya

    2006-08-16T23:59:59.000Z

    Reliability assessment is of primary importance in designing and planning distribution systems that operate in an economic manner with minimal interruption of customer loads. With the advances in renewable energy sources, ...

  11. Estimation of system reliability using a semiparametric model

    E-Print Network [OSTI]

    Wu, Leon

    An important problem in reliability engineering is to predict the failure rate, that is, the frequency with which an engineered system or component fails. This paper presents a new method of estimating failure rate using ...

  12. Trends in the Statistical Assessment of Reliability William Q. Meeker

    E-Print Network [OSTI]

    traces some of the history of the development of statistical methods for reliability assessment and makes of manufactured products that we have seen over the past 30 years (e.g., in automobiles manufactured in the United

  13. Empirical Measurements of Travelers' Value of Travel Time Reliability

    E-Print Network [OSTI]

    Danda, Santosh Rao

    2014-08-12T23:59:59.000Z

    Travel time and travel time reliability are two fundamental factors influencing travel behavior and demand. The concept of the value of time (VOT) has been extensively studied, and estimates of VOT have been obtained from surveys and empirical data...

  14. A reliability assessment methodology for distribution systems with distributed generation

    E-Print Network [OSTI]

    Duttagupta, Suchismita Sujaya

    2006-08-16T23:59:59.000Z

    Reliability assessment is of primary importance in designing and planning distribution systems that operate in an economic manner with minimal interruption of customer loads. With the advances in renewable energy sources, Distributed Generation (DG...

  15. Automatic Reconfiguration for Large-Scale Reliable Storage Systems

    E-Print Network [OSTI]

    Rodrigues, Rodrigo

    Byzantine-fault-tolerant replication enhances the availability and reliability of Internet services that store critical state and preserve it despite attacks or software errors. However, existing Byzantine-fault-tolerant ...

  16. Reliability assessment of electrical power systems using genetic algorithms 

    E-Print Network [OSTI]

    Samaan, Nader Amin Aziz

    2004-11-15T23:59:59.000Z

    ........................................................24 D. Calculating Reliability Indices........................................................25 IV. Case Studies.........................................................................................27 A. Case I: IEEE RTS-79... ......................................................................27 B. Case II: IEEE RTS-96.....................................................................33 V. Analysis of the Method........................................................................35 A. Effect of GA Parameters...

  17. Lamont Jackson Office of Electricity Delivery and Energy Reliability

    Energy Savers [EERE]

    March 28, 2012 Lamont Jackson Office of Electricity Delivery and Energy Reliability Mail Code: OE-20 U.S. Department of Energy 1000 Independence Avenue, S.W. Washington, D.C. 20585...

  18. Experiences with Two Reliability Data Collection Efforts (Presentation)

    SciTech Connect (OSTI)

    Sheng, S.; Lantz, E.

    2013-08-01T23:59:59.000Z

    This presentation, given by NREL at the Wind Reliability Experts Meeting in Albuquerque, New Mexico, outlines the causes of wind plant operational expenditures and gearbox failures and describes NREL's efforts to create a gearbox failure database.

  19. Multi-hazard Reliability Assessment of Offshore Wind Turbines

    E-Print Network [OSTI]

    Mardfekri Rastehkenari, Maryam 1981-

    2012-12-04T23:59:59.000Z

    A probabilistic framework is developed to assess the structural reliability of offshore wind turbines. Probabilistic models are developed to predict the deformation, shear force and bending moment demands on the support structure of wind turbines...

  20. DEVELOPMENT OFA RELIABLE WIRELESS GNSS SENSOR NETWORK Fabio Casciati1

    E-Print Network [OSTI]

    Boyer, Edmond

    , 96100 Siracusa, Italy 3 Institute of Micro/Nano Devices and Solar Cell, College of Physics from Texas Instrument. The network features low cost, low power, mesh topology, high reliability

  1. Software reliability and safety in nuclear reactor protection systems

    SciTech Connect (OSTI)

    Lawrence, J.D. [Lawrence Livermore National Lab., CA (United States)

    1993-11-01T23:59:59.000Z

    Planning the development, use and regulation of computer systems in nuclear reactor protection systems in such a way as to enhance reliability and safety is a complex issue. This report is one of a series of reports from the Computer Safety and Reliability Group, Lawrence Livermore that investigates different aspects of computer software in reactor National Laboratory, that investigates different aspects of computer software in reactor protection systems. There are two central themes in the report, First, software considerations cannot be fully understood in isolation from computer hardware and application considerations. Second, the process of engineering reliability and safety into a computer system requires activities to be carried out throughout the software life cycle. The report discusses the many activities that can be carried out during the software life cycle to improve the safety and reliability of the resulting product. The viewpoint is primarily that of the assessor, or auditor.

  2. FFTF (Fast Flux Test Facility) reactor shutdown system reliability reevaluation

    SciTech Connect (OSTI)

    Pierce, B.F.

    1986-07-01T23:59:59.000Z

    The reliability analysis of the Fast Flux Test Facility reactor shutdown system was reevaluated. Failure information based on five years of plant operating experience was used to verify original reliability numbers or to establish new ones. Also, system modifications made subsequent to performance of the original analysis were incorporated into the reevaluation. Reliability calculations and sensitivity analyses were performed using a commercially available spreadsheet on a personal computer. The spreadsheet was configured so that future failures could be tracked and compared with expected failures. A number of recommendations resulted from the reevaluation including both increased and decreased surveillance intervals. All recommendations were based on meeting or exceeding existing reliability goals. Considerable cost savings will be incurred upon implementation of the recommendations.

  3. Reliability improvement project decision making : water cooling system redesign

    E-Print Network [OSTI]

    Devine, Paul (Paul S.)

    2006-01-01T23:59:59.000Z

    Deciding on which reliability & performance improvement projects to launch or to reject has historically been an extremely challenging responsibility of Teradyne management. Incorrect decisions can lead to major customer ...

  4. Enhanced Reliability of Photovoltaic Systems with Energy Storage and Controls

    SciTech Connect (OSTI)

    Manz, D.; Schelenz, O.; Chandra, R.; Bose, S.; de Rooij, M.; Bebic, J.

    2008-02-01T23:59:59.000Z

    This report summarizes efforts to reconfigure loads during outages to allow individual customers the opportunity to enhance the reliability of their electric service through the management of their loads, photovoltaics, and energy storage devices.

  5. Wind Farm Diversification and Its Impact on Power System Reliability 

    E-Print Network [OSTI]

    Degeilh, Yannick

    2010-10-12T23:59:59.000Z

    As wind exploitation gains prominence in the power industry, the extensive use of this intermittent source of power may heavily rely on our ability to select the best combination of wind farming sites that yields maximal reliability of power systems...

  6. RELIABILITY OF WIND POWER FROM DISPERSED SITES: A PRELIMINARY ASSESSMENT

    E-Print Network [OSTI]

    Kahn, E.

    2011-01-01T23:59:59.000Z

    ON METHODOLOGY: FROM WIND POWER FREQUENCY TO LOSS-OF-LOADJ.P. , "Some Aspects of Wind Power Statistics, " J. of Appl.S£CTION Reliability of Wind Power From Dispersed Sites: A Pr

  7. Reliability assessment of autonomous power systems incorporating HVDC interconnection links

    SciTech Connect (OSTI)

    Dialynas, E.N.; Koskolos, N.C. [National Technical Univ., Athens (Greece). Dept. of Electrical and Computer Engineering] [National Technical Univ., Athens (Greece). Dept. of Electrical and Computer Engineering; Agoris, D. [Public Power Corp., Athens (Greece)] [Public Power Corp., Athens (Greece)

    1996-01-01T23:59:59.000Z

    The objective of this paper is to present an improved computational method for the overall reliability assessment of autonomous power systems that may or may not contain HVdc interconnection links. This is a hybrid method based on a Monte-Carlo simulation sequential approach which incorporates an analytical approach for the reliability modeling of the HVdc transmission links. The developed models and techniques have been implemented into a computer program that can be used to simulate the operational practices and characteristics of the overall system under study efficiently and realistically. A set of reliability indices are calculated for each load-point of interest and the entire system while a set of additional indices is calculated for quantifying the reliability performance of the interconnection links under the specified operating requirements. The analysis of a practical system is also included for a number of studies representing its various operating and design characteristics.

  8. Application of reliability concepts to the Nepal power system

    SciTech Connect (OSTI)

    Billinton, R.; Pandey, M.; Aboreshaid, S.; Fotuhi-Firuzabad, M. [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada). Power Systems Research Group

    1995-12-31T23:59:59.000Z

    In many of the less industrialized countries throughout the world, reliability is incorporated in power system planning and operation using traditional deterministic techniques. This is the case with the Nepal Power System (NPS), where developed expansion plans have been based on non-probabilistic criteria. This paper illustrates the application of probabilistic methods to reliability evaluation of the NPS. Evaluations at both the generation and composite generation and transmission system levels have been performed. The overall system and nine major load centers have been assessed. These load points carry in total more than 54% of the system load. An assessment of an expansion plan proposed by the Nepal Electricity Authority (NEA) has been performed. The results indicate the reliability implications associated with the system and the proposed expansion plan, and show that quantitative reliability evaluation of the NPS is both possible and practical.

  9. Multi-hazard Reliability Assessment of Offshore Wind Turbines 

    E-Print Network [OSTI]

    Mardfekri Rastehkenari, Maryam 1981-

    2012-12-04T23:59:59.000Z

    A probabilistic framework is developed to assess the structural reliability of offshore wind turbines. Probabilistic models are developed to predict the deformation, shear force and bending moment demands on the support structure of wind turbines...

  10. Short-term and long-term reliability studies in the deregulated power systems

    E-Print Network [OSTI]

    Li, Yishan

    2006-04-12T23:59:59.000Z

    for the new structure to maintain system reliability. Power system reliability is comprised of two basic components, adequacy and security. In terms of the time frame, power system reliability can mean short-term reliability or long-term reliability. Short...

  11. Web Cube: a Programming Model for Reliable Web Applications

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Web Cube: a Programming Model for Reliable Web Applications I.S.W.B. Prasetya, T.E.J. Vos, S UU-CS-2005-002 www.cs.uu.nl #12;Web Cube: a Programming Model for Reliable Web Applications I@cs.uu.nl, tanja@iti.upv.es, doaitse@cs.uu.nl, bela@cs.ui.ac.id Abstract Web Cube is a server side programming

  12. Improved load models for multi-area reliability calculations

    E-Print Network [OSTI]

    Pathak, Sanjesh

    1992-01-01T23:59:59.000Z

    IMPROVED LOAD MODELS FOR MULTI-AREA RELIABILITY CALCULATIONS A Thesis by SANJESH PATHAK Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... 1992 Major Subject: Electrical Engineering IMPROVED LOAD MODELS FOR MULTI-AREA RELIABILITY CALCULATIONS A Thesis by SAN JESH PATHAK Approved as to style and content by: Chanan Singh (Chair of Committee) Prasad Enjeti (Member) Ces . Mal, e...

  13. Reliable Gas Turbine Output: Attaining Temperature Independent Performance

    E-Print Network [OSTI]

    Neeley, J. E.; Patton, S.; Holder, F.

    % of the electric system, could create reliability and operational problems. This paper explores the potential for maintaining constant, reliable outputs from gas turbines by cooling ambient air temperatures before the air is used in the compressor section... strides have been made in the development of both aircraft, aircraft-derivative, and industrial gas turbines. The Basic Cycle The basic gas turbine engine consists of a compressor, a combustor, and a turbine in series. The intake air is compressed...

  14. High-reliability computing for the smarter planet

    SciTech Connect (OSTI)

    Quinn, Heather M [Los Alamos National Laboratory; Graham, Paul [Los Alamos National Laboratory; Manuzzato, Andrea [UNIV OF PADOVA; Dehon, Andre [UNIV OF PENN; Carter, Nicholas [INTEL CORPORATION

    2010-01-01T23:59:59.000Z

    The geometric rate of improvement of transistor size and integrated circuit performance, known as Moore's Law, has been an engine of growth for our economy, enabling new products and services, creating new value and wealth, increasing safety, and removing menial tasks from our daily lives. Affordable, highly integrated components have enabled both life-saving technologies and rich entertainment applications. Anti-lock brakes, insulin monitors, and GPS-enabled emergency response systems save lives. Cell phones, internet appliances, virtual worlds, realistic video games, and mp3 players enrich our lives and connect us together. Over the past 40 years of silicon scaling, the increasing capabilities of inexpensive computation have transformed our society through automation and ubiquitous communications. In this paper, we will present the concept of the smarter planet, how reliability failures affect current systems, and methods that can be used to increase the reliable adoption of new automation in the future. We will illustrate these issues using a number of different electronic devices in a couple of different scenarios. Recently IBM has been presenting the idea of a 'smarter planet.' In smarter planet documents, IBM discusses increased computer automation of roadways, banking, healthcare, and infrastructure, as automation could create more efficient systems. A necessary component of the smarter planet concept is to ensure that these new systems have very high reliability. Even extremely rare reliability problems can easily escalate to problematic scenarios when implemented at very large scales. For life-critical systems, such as automobiles, infrastructure, medical implantables, and avionic systems, unmitigated failures could be dangerous. As more automation moves into these types of critical systems, reliability failures will need to be managed. As computer automation continues to increase in our society, the need for greater radiation reliability is necessary. Already critical infrastructure is failing too frequently. In this paper, we will introduce the Cross-Layer Reliability concept for designing more reliable computer systems.

  15. Performance and reliability enhancement of turbo-pump labyrinth seals

    E-Print Network [OSTI]

    Guidry, Michael James

    1991-01-01T23:59:59.000Z

    PERFORMANCE AND RELIABILITY ENHANCEMENT OF TURBO-PUMP LABYRINTH SEALS A Thesis by MICHAEL JAMES GUIDRY, JR. Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE August 1991 Major Subject: Mechanical Engineering PERFORMANCE AND RELIABILITY ENHANCEMENT OF TURBO-PUMP LABYRINTH SEALS A Thesis by Michael Ja. mes Guidry, Jr. Approved as to style and content by: D. L. Rhode (Chair...

  16. Playas Grid Reliability and Distributed Energy Research

    SciTech Connect (OSTI)

    Romero, Van; Weinkauf, Don; Khan, Mushtaq; Helgeson, Wes; Weedeward, Kevin; LeClerc, Corey; Fuierer, Paul

    2012-06-30T23:59:59.000Z

    The future looks bright for solar and renewable energies in the United States. Recent studies claim that by 2050, solar power could supply a third of all electricity demand in the country’s western states. Technology advances, soft policy changes, and increased energy consciousness will all have to happen to achieve this goal. But the larger question is, what would it take to do more throughout the United States? The studies tie future solar and renewable growth in the United States to programs that aim to lower the soft costs of solar adoption, streamline utility interconnections, and increase technology advances through research and development. At the state and local levels, the most important steps are: • Net metering: Net metering policies lets customers offset their electric bills with onsite solar and receive reliable and fair compensation for the excess electricity they provide to the grid. Not surprisingly, what utilities consider fair is not necessarily a rate that’s favorable to solar customers. • Renewable portfolio standards (RPS): RPS policies require utilities to provide a certain amount of their power from renewable sources; some set specific targets for solar and other renewables. California’s aggressive RPS1 of 33% renewable energy by 2020 is not bankrupting the state, or its residents. • Strong statewide interconnection policies: Solar projects can experience significant delays and hassles just to get connected to the grid. Streamlined feasibility and impact analysis are needed. Good interconnection policies are crucial to the success of solar or renewable energy development. • Financing options: Financing is often the biggest obstacle to solar adoption. Those obstacles can be surmounted with policies that support creative financing options like third-party ownership (TPO) and property assessed clean energy (PACE). Attesting to the significance of TPO is the fact that in Arizona, it accounted for 86% of all residential photovoltaic (PV) installations in Q1 20132. Policies beyond those at the state level are also important for solar. The federal government must play a role including continuation of the federal Investment tax credit,3 responsible development of solar resources on public lands, and support for research and development (R&D) to reduce the cost of solar and help incorporate large amounts of solar into the grid. The local level can’t be ignored. Local governments should support: solar rights laws, feed-in tariffs (FITs), and solar-friendly zoning rules. A great example of how effective local policies can be is a city like Gainesville, Florida4, whose FIT policy has put it on the map as a solar leader. This is particularly noteworthy because the Sunshine State does not appear anywhere on the list of top solar states, despite its abundant solar resource. Lancaster, California5, began by streamlining the solar permitting process and now requires solar on every new home. Cities like these point to the power of local policies, and the ability of local governments to get things done. A conspicuously absent policy is Community Choice energy6, also called community choice aggregation (CCA). This model allows local governments to pool residential, business, and municipal electricity loads and to purchase or generate on their behalf. It provides rate stability and savings and allows more consumer choice and local control. The model need not be focused on clean energy, but it has been in California, where Marin Clean Energy7, the first CCA in California, was enabled by a state law -- highlighting the interplay of state and local action. Basic net metering8 has been getting a lot of attention. Utilities are attacking it9 in a number of states, claiming it’s unfair to ratepayers who don’t go solar. On the other hand, proponents of net metering say utilities’ fighting stance is driven by worries about their bottom line, not concern for their customers. Studies in California10, Vermont11, New York12, and Texas13 have found that the benefits of net metering (like savings on investments

  17. Final Report for the Virtual Reliability Realization System LDRD

    SciTech Connect (OSTI)

    DELLIN, THEODORE A.; HENDERSON, CHRISTOPHER L.; O'TOOLE, EDWARD J.

    2000-12-01T23:59:59.000Z

    Current approaches to reliability are not adequate to keep pace with the need for faster, better and cheaper products and systems. This is especially true in high consequence of failure applications. The original proposal for the LDRD was to look at this challenge and see if there was a new paradigm that could make reliability predictions, along with a quantitative estimate of the risk in that prediction, in a way that was faster, better and cheaper. Such an approach would be based on the underlying science models that are the backbone of reliability predictions. The new paradigm would be implemented in two software tools: the Virtual Reliability Realization System (VRRS) and the Reliability Expert System (REX). The three-year LDRD was funded at a reduced level for the first year ($120K vs. $250K) and not renewed. Because of the reduced funding, we concentrated on the initial development of the expertise system. We developed an interactive semiconductor calculation tool needed for reliability analyses. We also were able to generate a basic functional system using Microsoft Siteserver Commerce Edition and Microsoft Sequel Server. The base system has the capability to store Office documents from multiple authors, and has the ability to track and charge for usage. The full outline of the knowledge model has been incorporated as well as examples of various types of content.

  18. LED Price Tracking Form

    Broader source: Energy.gov [DOE]

    DOE intends to update the SSL Pricing and Efficacy Trend Analysis for Utility Program Planning report on an annual basis, but doing so requires that we have sufficient product and purchase data including acquisition date, purchase price, product category, and rated initial lumens. Those interested in helping collect this data are asked to use the LED Price Tracking FormMicrosoft Excel and follow the instructions for submitting data.

  19. ARM - VAP Suggestion Form

    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 3,625govInstrumentstdmadap DocumentationProductsmwravgProductsaodmfrsraod1michProductsaodsasheniraodSuggestion Form

  20. Qualitative human reliability analysis for spent fuel handling

    SciTech Connect (OSTI)

    Brewer, J. D. [Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185-0748 (United States); Amico, P. [Science Applications International Corporation (United States); Cooper, S. E. [United Stated Nuclear Regulatory Commission (United States)

    2006-07-01T23:59:59.000Z

    Human reliability analysis (HRA) methods have been developed primarily to provide information for use in probabilistic risk assessments (PRAs) that analyze nuclear power plant (NPP) operations. Given the original emphasis of these methods, it is understandable that many HRAs have not ventured far from NPP control room applications. Despite this historical focus on the control room, there has been growing interest and discussion regarding the application of HRA methods to other NPP activities such as spent fuel handling (SFH) or operations in different types of facilities. One recently developed HRA method, 'A Technique for Human Event Analysis' (ATHEANA) has been proposed as a promising candidate for diverse applications due to its particular approach for systematically uncovering the dynamic, contextual conditions influencing human performance. This paper describes one successful test of this proposition by presenting portions of a recently completed project in which a scoping study was performed to accomplish the following goals: (1) investigate what should be included in a qualitative HRA for spent fuel and cask handling operations; and (2) demonstrate that the ATHEANA HRA technique can be usefully applied to these operations. The preliminary, scoping qualitative HRA examined, in a generic manner, how human performance of SFH and dry cask storage operations (DCSOs) can plausibly lead to radiological consequences that impact the public and the environment. The study involved the performance of typical, qualitative HRA tasks such as collecting relevant information and the preliminary identification of human failure events or unsafe actions, relevant influences (e.g., performance shaping factors, other contextual factors), event scenario development and categorization of human failure event (HFE) scenario groupings. Information from relevant literature sources was augmented with subject matter expert interviews and analysis of an edited video of selected operations. Elements of NUREG-1792, Good Practices for Implementing Human Reliability Analyses (HRA) and NUREG-1624, Rev. 1, Technical Basis and Implementation Guidelines for A Technique for Human Event Analysis (ATHEANA) formed critical parts of the technical basis for the preliminary analysis. Mis-loading of spent fuel into a cask and dropping of a loaded cask were the two human failure event groupings of primary interest, although all human performance aspects of DCSOs were considered to some extent. Of important note is that HRA is typically performed in the context of a plant-specific PRA study. This analysis was performed without the benefit of the context provided by a larger PRA study, nor was it plant specific, and so it investigated only generic HRA issues relevant to SFH. However, the improved understanding of human performance issues provided by the study will likely enhance the ability to carry out a detailed qualitative HRA for a specific NPP at some point in the future. Furthermore, support was obtained regarding the potential for applying ATHEANA beyond NPP settings. This paper provides a description of the process followed during the analysis, a description of the HFE scenario groupings, discussion regarding general human performance vulnerabilities, and a detailed examination of one HFE scenario developed in the study. (authors)

  1. Leveraging Biologically-inspired Mobile Agents Supporting Composite Needs of Reliability and Timeliness in Sensor Applications

    E-Print Network [OSTI]

    Suzuki, Jun

    Leveraging Biologically-inspired Mobile Agents Supporting Composite Needs of Reliability energy consumption. Existing work consid- ers reliability, timeliness and energy consumption largely balance the tradeoffs among reliability, timeliness and energy efficiency and outperform an existing

  2. Reliability and Availability Requirements Engineering within the Unified Process using a

    E-Print Network [OSTI]

    Lutz, Robyn R.

    Reliability and Availability Requirements Engineering within the Unified Process using to support quantifiable, testable reliability and availability requirements (R&AR) elicitation, reliability and availability re- quirements, Unified Modeling Language profile, misuse cases, fault trees. I

  3. Turbine cooling configuration selection and design optimization for the high-reliability gas turbine. Final report

    SciTech Connect (OSTI)

    Smith, M J; Suo, M

    1981-04-01T23:59:59.000Z

    The potential of advanced turbine convectively air-cooled concepts for application to the Department of Energy/Electric Power Research Institute (EPRI) Advanced Liquid/Gas-Fueled Engine Program was investigated. Cooling of turbine airfoils is critical technology and significant advances in cooling technology will permit higher efficiency coal-base-fuel gas turbine energy systems. Two new airfoil construction techniques, bonded and wafer, were the principal designs considered. In the bonded construction, two airfoil sections having intricate internal cooling configurations are bonded together to form a complete blade or vane. In the wafer construction, a larger number (50 or more) of wafers having intricate cooling flow passages are bonded together to form a complete blade or vane. Of these two construction techniques, the bonded airfoil is considered to be lower in risk and closer to production readiness. Bonded airfoils are being used in aircraft engines. A variety of industrial materials were evaluated for the turbine airfoils. A columnar grain nickel alloy was selected on the basis of strength and corrosion resistance. Also, cost of electricity and reliability were considered in the final concept evaluation. The bonded airfoil design yielded a 3.5% reduction in cost-of-electricity relative to a baseline Reliable Engine design. A significant conclusion of this study was that the bonded airfoil convectively air-cooled design offers potential for growth to turbine inlet temperatures above 2600/sup 0/F with reasonable development risk.

  4. Forms | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: FinalOffers3.pdf0-45.pdf Flash2010-45.pdfFlash2011-43andPropertyForPlans Fact SheetForms

  5. Coach Compliance Form

    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 zManufacturing:DOECoach Compliance Form My team is

  6. FORM EIA-28

    U.S. Energy Information Administration (EIA) Indexed Site

    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 IndustriesTownDells, Wisconsin:DeploymentSite Name: Email: Terminal2,7,7,of2014FORM EIA-28 -

  7. Form EIA-920 - 2005

    U.S. Energy Information Administration (EIA) Indexed Site

    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 IndustriesTownDells, Wisconsin:DeploymentSite Name: Email:Uranium MarketingAdministration Form

  8. Forms | Department of Energy

    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) Environmental Assessments (EA)Budget(DANCE) TargetForms & Documents

  9. Radiation Safety Work Control Form

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

    Radiation Safety Work Control Form (see instructions on pg-3) Rev. May 2014 Area: Form : Date: Preliminary Applicability Screen: (a) Will closing the beam line injection stoppers...

  10. How atmospheric ice forms | EMSL

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

    atmospheric ice forms How atmospheric ice forms Released: September 08, 2014 New insights into atmospheric ice formation could improve climate models This study advances our...

  11. Fracture mechanics models developed for piping reliability assessment in light water reactors: piping reliability project

    SciTech Connect (OSTI)

    Harris, D.O.; Lim, E.Y.; Dedhia, D.D.; Woo, H.H.; Chou, C.K.

    1982-06-01T23:59:59.000Z

    The efforts concentrated on modifications of the stratified Monte Carlo code called PRAISE (Piping Reliability Analysis Including Seismic Events) to make it more widely applicable to probabilistic fracture mechanics analysis of nuclear reactor piping. Pipe failures are considered to occur as the result of crack-like defects introduced during fabrication, that escape detection during inspections. The code modifications allow the following factors in addition to those considered in earlier work to be treated: other materials, failure criteria and subcritical crack growth characteristic; welding residual and vibratory stresses; and longitudinal welds (the original version considered only circumferential welds). The fracture mechanics background for the code modifications is included, and details of the modifications themselves provided. Additionally, an updated version of the PRAISE user's manual is included. The revised code, known as PRAISE-B was then applied to a variety of piping problems, including various size lines subject to stress corrosion cracking and vibratory stresses. Analyses including residual stresses and longitudinal welds were also performed.

  12. A Methodology to Assess the Reliability of Hydrogen-based Transportation Energy Systems

    E-Print Network [OSTI]

    McCarthy, Ryan

    2004-01-01T23:59:59.000Z

    2. Define reliability in hydrogen energy systems 3.metrics to value reliability in hydrogen energy systems 4.Specify hydrogen energy systems to evaluate 5. Develop

  13. Estimated Value of Service Reliability for Electric Utility Customers in the United States

    E-Print Network [OSTI]

    Sullivan, M.J.

    2009-01-01T23:59:59.000Z

    reliability of their transmission and distribution systemsdistribution against the incremental benefits of enhanced (or maintained) system reliabilitysystem reliability reinforcements; Assessing the economic benefits of distribution

  14. 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.

  15. Sprinkler: A reliable and energy efficient data dissemination service for extreme scale wireless networks of embedded devices

    E-Print Network [OSTI]

    Naik, Vinayak; Arora, Anish; Sinha, Prasun; Zhang, Hongwei

    2007-01-01T23:59:59.000Z

    A RELIABLE AND ENERGY EFFICIENT DATA DISSEMINATION SERVICEA RELIABLE AND ENERGY EFFICIENT DATA DISSEMINATION SERVICEA Reliable and Energy Efficient Data Dissemination Service

  16. MEMS Reliability: Infrastructure, Test Structures, Experiments, and Failure Modes

    SciTech Connect (OSTI)

    TANNER,DANELLE M.; SMITH,NORMAN F.; IRWIN,LLOYD W.; EATON,WILLIAM P.; HELGESEN,KAREN SUE; CLEMENT,J. JOSEPH; MILLER,WILLIAM M.; MILLER,SAMUEL L.; DUGGER,MICHAEL T.; WALRAVEN,JEREMY A.; PETERSON,KENNETH A.

    2000-01-01T23:59:59.000Z

    The burgeoning new technology of Micro-Electro-Mechanical Systems (MEMS) shows great promise in the weapons arena. We can now conceive of micro-gyros, micro-surety systems, and micro-navigators that are extremely small and inexpensive. Do we want to use this new technology in critical applications such as nuclear weapons? This question drove us to understand the reliability and failure mechanisms of silicon surface-micromachined MEMS. Development of a testing infrastructure was a crucial step to perform reliability experiments on MEMS devices and will be reported here. In addition, reliability test structures have been designed and characterized. Many experiments were performed to investigate failure modes and specifically those in different environments (humidity, temperature, shock, vibration, and storage). A predictive reliability model for wear of rubbing surfaces in microengines was developed. The root causes of failure for operating and non-operating MEMS are discussed. The major failure mechanism for operating MEMS was wear of the polysilicon rubbing surfaces. Reliability design rules for future MEMS devices are established.

  17. Plutonium immobilization form evaluation

    SciTech Connect (OSTI)

    Gray, L. W., LLNL

    1998-02-13T23:59:59.000Z

    The 1994 National Academy of Sciences study and the 1997 assessment by DOE`s Office of Nonproliferation and National Security have emphasized the importance of the overall objectives of the Plutonium Disposition Program of beginning disposition rapidly. President Clinton and other leaders of the G-7 plus one (`Political Eight`) group of states, at the Moscow Nuclear Safety And Security Summit in April 1996, agreed on the objectives of accomplishing disposition of excess fissile material as soon as practicable. To meet these objectives, DOE has laid out an aggressive schedule in which large-scale immobilization operations would begin in 2005. Lawrence Livermore National Laboratory (LLNL), the lead laboratory for the development of Pu immobilization technologies for the Department of Energy`s Office of Fissile Materials Disposition (MD), was requested by MD to recommend the preferred immobilization form and technology for the disposition of excess weapons-usable Pu. In a series of three separate evaluations, the technologies for the candidate glass and ceramic forms were compared against criteria and metrics that reflect programmatic and technical objectives: (1) Evaluation of the R&D and engineering data for the two forms against the decision criteria/metrics by a technical evaluation panel comprising experts from within the immobilization program. (2) Integrated assessment by LLNL immobilization management of the candidate technologies with respect to the weighted criteria and other programmatic objectives, leading to a recommendation to DOE/MD on the preferred technology based on technical factors. (3) Assessment of the decision process, evaluation, and recommendation by a peer review panel of independent experts. Criteria used to assess the relative merits of the immobilization technologies were a subset of the criteria previously used by MD to choose among disposition options leading to the Programmatic Environmental Impact Statement and Record of Decision for the Storage and Disposition of Weapons-Usable Fissile Materials, January 1997. Criteria were: (1) resistance to Pu theft, diversion, and recovery by a terrorist organization or rogue nation; (2) resistance to recovery and reuse by host nation; (3) technical viability, including technical maturity, development risk, and acceptability for repository disposal; (4) environmental, safety, and health factors; (5) cost effectiveness; and (6) timeliness. On the basis of the technical evaluation and assessments, in September, 1997, LLNL recommended to DOE/MD that ceramic technologies be developed for deployment in the planned Pu immobilization plant.

  18. STEP Utility Data Release Form

    Broader source: Energy.gov [DOE]

    STEP Utility Data Release Form, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  19. Nucleon Electromagnetic Form Factors

    SciTech Connect (OSTI)

    Marc Vanderhaeghen; Charles Perdrisat; Vina Punjabi

    2007-10-01T23:59:59.000Z

    There has been much activity in the measurement of the elastic electromagnetic proton and neutron form factors in the last decade, and the quality of the data has greatly improved by performing double polarization experiments, in comparison with previous unpolarized data. Here we review the experimental data base in view of the new results for the proton, and neutron, obtained at JLab, MAMI, and MIT-Bates. The rapid evolution of phenomenological models triggered by these high-precision experiments will be discussed, including the recent progress in the determination of the valence quark generalized parton distributions of the nucleon, as well as the steady rate of improvements made in the lattice QCD calculations.

  20. DAKOTA reliability methods applied to RAVEN/RELAP-7.

    SciTech Connect (OSTI)

    Swiler, Laura Painton; Mandelli, Diego [Idaho National Laboratory, Idaho Falls, ID; Rabiti, Cristian [Idaho National Laboratory, Idaho Falls, ID; Alfonsi, Andrea [Idaho National Laboratory, Idaho Falls, ID

    2013-09-01T23:59:59.000Z

    This report summarizes the result of a NEAMS project focused on the use of reliability methods within the RAVEN and RELAP-7 software framework for assessing failure probabilities as part of probabilistic risk assessment for nuclear power plants. RAVEN is a software tool under development at the Idaho National Laboratory that acts as the control logic driver and post-processing tool for the newly developed Thermal-Hydraulic code RELAP-7. Dakota is a software tool developed at Sandia National Laboratories containing optimization, sensitivity analysis, and uncertainty quantification algorithms. Reliability methods are algorithms which transform the uncertainty problem to an optimization problem to solve for the failure probability, given uncertainty on problem inputs and a failure threshold on an output response. The goal of this work is to demonstrate the use of reliability methods in Dakota with RAVEN/RELAP-7. These capabilities are demonstrated on a demonstration of a Station Blackout analysis of a simplified Pressurized Water Reactor (PWR).

  1. Research Opportunities in Reliability of Photovoltaic Modules (Presentation)

    SciTech Connect (OSTI)

    Hacke, P.

    2010-05-01T23:59:59.000Z

    The motivation for an increased scope and a more proactive effort in reliability research of photovoltaic modules and systems includes reducing the levelized cost of energy and gaining better confidence in the energy and financial payback for photovoltaic systems. This increased reliability and confidence will lead to greater penetration of photovoltaics in the energy portfolio and greater employment in photovoltaics and related industries. Present research needs include the fundamental degradation mechanisms of polymers, connectors and other module components, mapping of failure mechanisms observed in the field to those in accelerated lifetime tests, determining the acceleration factors, and improving standards for modules such that tests can appropriately be assigned to evaluate their long term durability. Specific mechanisms discussed are corrosion in module components, metastability in thin-film active layers, delamination and loss of elastic properties in module polymeric materials, and inverter failure. Presently, there is hiring of reliability scientists and engineers at many levels of the value chain for photovoltaics.

  2. Reliability analysis of fatigue sensitive joints in FPSO

    SciTech Connect (OSTI)

    Kaminski, M.L. [Nevesbu, The Hague (Netherlands); Krekel, M. [Bluewater, Hoofddorp (Netherlands)

    1995-12-31T23:59:59.000Z

    This paper contains a general description and the results of a reliability analysis made for fatigue sensitive joints in an FPSO. The main aim of the analysis was to demonstrate that the inspection program, which was specified based on the IMO resolution, will guarantee an acceptable probability level of fatigue and fracture failure during 20 years of service of the unit. Three approaches have been followed: the SN-approach and the fracture mechanics approach with and without allowance for fracture. The planned inspection program has been taken into account in the third approach. The stress assessment has been based on the spectral analysis corrected for the intermittent wetting effect. A short description of the deterministic analyses which preceded the reliability analysis has been included. It has been demonstrated in the paper that the probability of fatigue and fracture failure in an inspected structure can be assessed and judged by use of the reliability analysis.

  3. The Role of Demand Resources In Regional Transmission Expansion Planning and Reliable Operations

    SciTech Connect (OSTI)

    Kirby, Brendan J [ORNL

    2006-07-01T23:59:59.000Z

    Investigating the role of demand resources in regional transmission planning has provided mixed results. On one hand there are only a few projects where demand response has been used as an explicit alternative to transmission enhancement. On the other hand there is a fair amount of demand response in the form of energy efficiency, peak reduction, emergency load shedding, and (recently) demand providing ancillary services. All of this demand response reduces the need for transmission enhancements. Demand response capability is typically (but not always) factored into transmission planning as a reduction in the load which must be served. In that sense demand response is utilized as an alternative to transmission expansion. Much more demand response is used (involuntarily) as load shedding under extreme conditions to prevent cascading blackouts. The amount of additional transmission and generation that would be required to provide the current level of reliability if load shedding were not available is difficult to imagine and would be impractical to build. In a very real sense demand response solutions are equitably treated in every region - when proposed, demand response projects are evaluated against existing reliability and economic criteria. The regional councils, RTOs, and ISOs identify needs. Others propose transmission, generation, or responsive load based solutions. Few demand response projects get included in transmission enhancement plans because few are proposed. But this is only part of the story. Several factors are responsible for the current very low use of demand response as a transmission enhancement alternative. First, while the generation, transmission, and load business sectors each deal with essentially the same amount of electric power, generation and transmission companies are explicitly in the electric power business but electricity is not the primary business focus of most loads. This changes the institutional focus of each sector. Second, market and reliability rules have, understandably, been written around the capabilities and limitations of generators, the historic reliability resources. Responsive load limitations and capabilities are often not accommodated in markets or reliability criteria. Third, because of the institutional structure, demand response alternatives are treated as temporary solutions that can delay but not replace transmission enhancement. Financing has to be based on a three to five year project life as opposed to the twenty to fifty year life of transmission facilities. More can be done to integrate demand response options into transmission expansion planning. Given the societal benefits it may be appropriate for independent transmission planning organizations to take a more proactive role in drawing demand response alternatives into the resource mix. Existing demand response programs provide a technical basis to build from. Regulatory and market obstacles will have to be overcome if demand response alternatives are to be routinely considered in transmission expansion planning.

  4. Application of reliability analysis method to fusion component testing

    SciTech Connect (OSTI)

    Ying, A.Y.; Abdou, M.A. [Univ. of California, Los Angeles, CA (United States)

    1994-12-31T23:59:59.000Z

    The term reliability here implies that a component satisfies a set of performance criteria while under specified conditions of use over a specified period of time. For fusion nuclear technology, the reliability goal to be pursued is the development of a mean time between failures (MTBF) for a component which is longer than its lifetime goal. While the component lifetime is mainly determined by the fluence limitation (i.e., damage level) which leads to performance degradation or failure, the MTBF represents an arithmetic average life of all units in a population. One method of assessing the reliability goal involves determining component availability needs to meet the goal plant availability, defining a test-analyze-fix development program to improve component reliability, and quantifying both test times and the number of test articles that would be required to ensure that a specified target MTBF is met. Statistically, constant failure rates and exponential life distributions are assumed for analyses and blanket component development is used as an example. However, as data are collected the probability distribution of the parameter of interest can be updated in a Bayesian fashion. The nuclear component testing program will be structured such that reliability requirements for DEMO can be achieved. The program shall not exclude the practice of a good design (such as reducing the complexity of the system to the minimum essential for the required operation), the execution of high quality manufacturing and inspection processes, and the implication of quality assurance and control for component development. In fact, the assurance of a high quality testing/development program is essential so that there is no question left for reliability.

  5. Reliability-based condition assessment of steel containment and liners

    SciTech Connect (OSTI)

    Ellingwood, B.; Bhattacharya, B.; Zheng, R. [Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Civil Engineering

    1996-11-01T23:59:59.000Z

    Steel containments and liners in nuclear power plants may be exposed to aggressive environments that may cause their strength and stiffness to decrease during the plant service life. Among the factors recognized as having the potential to cause structural deterioration are uniform, pitting or crevice corrosion; fatigue, including crack initiation and propagation to fracture; elevated temperature; and irradiation. The evaluation of steel containments and liners for continued service must provide assurance that they are able to withstand future extreme loads during the service period with a level of reliability that is sufficient for public safety. Rational methodologies to provide such assurances can be developed using modern structural reliability analysis principles that take uncertainties in loading, strength, and degradation resulting from environmental factors into account. The research described in this report is in support of the Steel Containments and Liners Program being conducted for the US Nuclear Regulatory Commission by the Oak Ridge National Laboratory. The research demonstrates the feasibility of using reliability analysis as a tool for performing condition assessments and service life predictions of steel containments and liners. Mathematical models that describe time-dependent changes in steel due to aggressive environmental factors are identified, and statistical data supporting the use of these models in time-dependent reliability analysis are summarized. The analysis of steel containment fragility is described, and simple illustrations of the impact on reliability of structural degradation are provided. The role of nondestructive evaluation in time-dependent reliability analysis, both in terms of defect detection and sizing, is examined. A Markov model provides a tool for accounting for time-dependent changes in damage condition of a structural component or system. 151 refs.

  6. Reliability guarantees, demonstration, and control for weapon systems proposals

    E-Print Network [OSTI]

    Lanier, Ross Edwin

    1959-01-01T23:59:59.000Z

    LIBRARY A AIA OOI. ' gsE IIR TEXA5 RELIABILITY GUARAMTMsS ~ Dr3EOMS' HAT IOM ~ AKD COMTROL ZOR ViIMAPOM SYST3QKS PROPOSALS A Thesis ROSS EII5tIM LAMIER Submitted to the Graduate Sohool of the Agrioultural and Mechanical College of Texas... in partial fulfillment oi the requirements for the PHOPASSIOMAL LbiGkhr IM MMGIMKKRIMG January 1959 Ma)or Sub)sets Sleotrioal MngineeriIIg RELIABILITY GUARANIS, ISMONSTRATION& A53 CONTROL POR WEAPON SYSTEMS PROPOSALS ROSS ~~' WIN LANI' APProved...

  7. Product acceptance environmental and destructive testing for reliability.

    SciTech Connect (OSTI)

    Dvorack, Michael A.; Kerschen, Thomas J.; Collins, Elmer W.

    2007-08-01T23:59:59.000Z

    To determine whether a component is meeting its reliability requirement during production, acceptance sampling is employed in which selected units coming off the production line are subjected to additional environmental and/or destructive tests that are within the normal environment space to which the component is expected to be exposed throughout its life in the Stockpile. This report describes what these tests are and how they are scored for reliability purposes. The roles of screens, Engineering Use Only tests, and next assembly product acceptance testing are also discussed, along with both the advantages and disadvantages of environmental and destructive testing.

  8. DOE Nuclear Weapon Reliability Definition: History, Description, and Implementation

    SciTech Connect (OSTI)

    Wright, D.L.; Cashen, J.J.; Sjulin, J.M.; Bierbaum, R.L.; Kerschen, T.J.

    1999-04-01T23:59:59.000Z

    The overarching goal of the Department of Energy (DOE) nuclear weapon reliability assessment process is to provide a quantitative metric that reflects the ability of the weapons to perform their intended function successfully. This white paper is intended to provide insight into the current and long-standing DOE definition of nuclear weapon reliability, which can be summarized as: The probability of achieving the specified yield, at the target, across the Stockpile-To-Target Sequence of environments, throughout the weapon's lifetime, assuming proper inputs.

  9. Monitoring Software Reliability using Statistical Process control: An MMLE approach

    E-Print Network [OSTI]

    Prasad, R Satya; Kantam, R R L

    2011-01-01T23:59:59.000Z

    This paper consider an MMLE (Modified Maximum Likelihood Estimation) based scheme to estimate software reliability using exponential distribution. The MMLE is one of the generalized frameworks of software reliability models of Non Homogeneous Poisson Processes (NHPPs). The MMLE gives analytical estimators rather than an iterative approximation to estimate the parameters. In this paper we proposed SPC (Statistical Process Control) Charts mechanism to determine the software quality using inter failure times data. The Control charts can be used to measure whether the software process is statistically under control or not.

  10. Human Reliability Analysis for Digital Human-Machine Interfaces

    SciTech Connect (OSTI)

    Ronald L. Boring

    2014-06-01T23:59:59.000Z

    This paper addresses the fact that existing human reliability analysis (HRA) methods do not provide guidance on digital human-machine interfaces (HMIs). Digital HMIs are becoming ubiquitous in nuclear power operations, whether through control room modernization or new-build control rooms. Legacy analog technologies like instrumentation and control (I&C) systems are costly to support, and vendors no longer develop or support analog technology, which is considered technologically obsolete. Yet, despite the inevitability of digital HMI, no current HRA method provides guidance on how to treat human reliability considerations for digital technologies.

  11. Reliability analysis for LEB ring magnet power system in SSC

    SciTech Connect (OSTI)

    Smedley, K.

    1991-11-01T23:59:59.000Z

    The LEB ring magnet power system contains six subsystems, supervisory control, power supplies, regulation, DC bus, resonant cells, and fault sensing network. The system availability of the total LEB RMPS is required to be 0.999. The work in this paper is to allocate the overall LEB RMPS reliability requirement into reliability requirements for each of the subsystems and lower-tier items. The Feasibility-of-Objective technique combining with engineering experience is the key for the allocation. MIL-HDBK-217F is used to derate SCR components. 7 refs., 5 figs.

  12. Reliable fuel source | Y-12 National Security Complex

    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 Scienceand Requirements Recently ApprovedReliability Technology earns award Reliability

  13. Form Date 4/4/01 Refrigerant Service Order Form

    E-Print Network [OSTI]

    Russell, Lynn

    Form Date 4/4/01 Refrigerant Service Order Form Service ID: Owner: Work Order #: Building: Date: Issued: Completed: Equipment ID: Technicians: Location: Model: Manufact: Serial #: Refrigerant Type Minor Maintenance Recovery Vacuum: __________Inches Dispose of Unit Refrigerant Conversion Major

  14. Models for Battery Reliability and Lifetime: Applications in Design and Health Management (Presentation)

    SciTech Connect (OSTI)

    Smith, K.; Neubauer, J.; Wood, E.; Jun, M.; Pesaran, A.

    2013-06-01T23:59:59.000Z

    This presentation discusses models for battery reliability and lifetime and the Battery Ownership Model.

  15. Software Selection for Reliability Optimization using Time Series Analysis and Machine Learning

    E-Print Network [OSTI]

    Mu, Yali

    2013-01-01T23:59:59.000Z

    K-means Algorithms . . . . . . . . . . .reliability. . . . . . . . . . . . . . K-means algorithm. [of K-means . . . . . . . . . . . . . . . . . 4 Conclusions

  16. Thermal Performance and Reliability of Bonded Interfaces for Power Electronics Packaging Applications (Presentation)

    SciTech Connect (OSTI)

    Devoto, D.

    2013-07-01T23:59:59.000Z

    This presentation discusses the thermal performance and reliability of bonded interfaces for power electronics packaging applications.

  17. Integrating Photovoltaic Inverter Reliability into Energy Yield Estimation with Markov Models

    E-Print Network [OSTI]

    Liberzon, Daniel

    fixed costs in typical installations. Detailed reliability studies pertaining to PV modules, inverters

  18. Composite System based Multi-Area Reliability Evaluation 

    E-Print Network [OSTI]

    Nagarajan, Ramya

    2011-02-22T23:59:59.000Z

    and no - load loss sharing policy among the areas. The proposed method is applied to standard IEEE 24 bus Reliability Test System (RTS) and the traditional equivalent tie-line method is applied to the multi-area configuration of the same test system. The results...

  19. Fourteenth Service Water System Reliability Improvement Seminar Proceedings

    SciTech Connect (OSTI)

    None

    2002-06-01T23:59:59.000Z

    This report contains information presented at the Fourteenth Service Water System Reliability Improvement (SWSRI) Seminar held June 24-25, 2002, in San Diego, California. The bi-annual seminar--sponsored by EPRI--provided an opportunity for participants to exchange technical information and experiences regarding the monitoring, repair, and replacement of service water system components.

  20. MULTIAREA SYSTEM RELIABILITY: THE ECONOMIC EVALUATION OF SYSTEM SECURITY CRITERIA

    E-Print Network [OSTI]

    Gross, George

    MULTIAREA SYSTEM RELIABILITY: THE ECONOMIC EVALUATION OF SYSTEM SECURITY CRITERIA BY TEOMAN GULER B assessment studies and the quantification of the economics of secure power system operations security and the economics of secure operations in the competitive market environment. The advent

  1. Hidden Challenges to MEMS Commercialization: Design Realization and Reliability Assurance

    SciTech Connect (OSTI)

    McWhorter, P.J.; Miller, S.L.; Miller, W.M.; Rodger, M.S.; Yarberry, V.R.

    1999-01-20T23:59:59.000Z

    The successful commercialization of MicroElectroMechanical Systems (MEMS) is an essential prerequisite for their implementation in many critical government applications. Several unique challenges must be overcome to achieve this widespread commercialization. Challenges associated with design realization and reliability assurance are discussed, along with approaches taken by Sandia to successfully overcome these challenges.

  2. Chip-Level Electromigration Reliability for Cu Interconnects

    SciTech Connect (OSTI)

    Gall, M.; Oh, C.; Grinshpon, A.; Zolotov, V.; Panda, R.; Demircan, E.; Mueller, J.; Justison, P.; Ramakrishna, K.; Thrasher, S.; Hernandez, R.; Herrick, M.; Fox, R.; Boeck, B.; Kawasaki, H. [Technology Solutions Organization, Freescale Semiconductor (United States); Haznedar, H.; Ku, P. [Sector Quality, Freescale Semiconductor (United States)

    2004-12-08T23:59:59.000Z

    Even after the successful introduction of Cu-based metallization, the electromigration (EM) failure risk has remained one of the most important reliability concerns for most advanced process technologies. Ever increasing operating current densities and the introduction of low-k materials in the backend process scheme are some of the issues that threaten reliable, long-term operation at elevated temperatures. The traditional method of verifying EM reliability only through current density limit checks is proving to be inadequate in general, or quite expensive at the best. A Statistical EM Budgeting (SEB) methodology has been proposed to assess more realistic chip-level EM reliability from the complex statistical distribution of currents in a chip. To be valuable, this approach requires accurate estimation of currents for all interconnect segments in a chip. However, no efficient technique to manage the complexity of such a task for very large chip designs is known. We present an efficient method to estimate currents exhaustively for all interconnects in a chip. The proposed method uses pre-characterization of cells and macros, and steps to identify and filter out symmetrically bi-directional interconnects. We illustrate the strength of the proposed approach using a high-performance microprocessor design for embedded applications as a case study.

  3. BAYESIAN RELIABILITY MODELING FOR MASKED SYSTEM LIFETIME DATA

    E-Print Network [OSTI]

    Kuo, Lynn

    supported by Korea Science and Engineering Foundation 971­0105­027­2. 1 #12; reliability of the components of Statistics, University of Connecticut, Storrs, CT 06269­3120, USA Tae Young YANG y Department of Mathematics consider various probability models for the conditional masking probabilities that identify the set

  4. Opis: Reliable Distributed Systems in OCaml Pierre-Evariste Dagand

    E-Print Network [OSTI]

    Kuncak, Viktor

    Opis: Reliable Distributed Systems in OCaml Pierre-´Evariste Dagand ENS Cachan-Bretagne, France languages provide an excellent vehicle for developing and debugging distributed systems. We present Opis, a functional-reactive approach for de- veloping distributed systems in Objective Caml. An Opis protocol

  5. Transformer Thermal Modeling: Improving Reliability Using Data Quality Control

    E-Print Network [OSTI]

    1 Transformer Thermal Modeling: Improving Reliability Using Data Quality Control Daniel J. Tylavsky--Eventually all large transformers will be dynamically loaded using models updated regularly from field measured data. Models obtained from measured data give more accurate results than models based on transformer

  6. SCORE: a Scalable Concolic Testing Tool for Reliable Embedded Software

    E-Print Network [OSTI]

    in an automated fashion. One main task of concolic testing is to extract symbolic in- formation from a concrete cases in an automated manner. An alternative approach, concolic (CONCrete + symbOLIC) [17] testing (alsoSCORE: a Scalable Concolic Testing Tool for Reliable Embedded Software Yunho Kim and Moonzoo Kim

  7. Reliability Modeling and Evaluation in Aging Power Systems

    E-Print Network [OSTI]

    Kim, Hag-Kwen

    2010-01-14T23:59:59.000Z

    Renewal process has been often employed as a mathematical model of the failure and repair cycle of components in power system reliability assessment. This implies that after repair, the component is assumed to be restored to be in as good as new...

  8. Inter-rater reliability of the Strain Index

    E-Print Network [OSTI]

    Stevens, Edward Martin

    2003-01-01T23:59:59.000Z

    of this study was to determine the inter-rater reliability of the Strain Index. Using a computer to view digitized segments of job tasks that represented a balanced spectrum of task variable ratings, fifteen raters initially estimated or measured data for five...

  9. Automated Energy Distribution and Reliability System (AEDR): Final Report

    SciTech Connect (OSTI)

    Buche, D. L.

    2008-07-01T23:59:59.000Z

    This report describes Northern Indiana Public Service Co. project efforts to develop an automated energy distribution and reliability system. The purpose of this project was to implement a database-driven GIS solution that would manage all of the company's gas, electric, and landbase objects.

  10. Security-Constrained Adequacy Evaluation of Bulk Power System Reliability

    E-Print Network [OSTI]

    Security-Constrained Adequacy Evaluation of Bulk Power System Reliability Fang Yang, Student Member. Stefopoulos, Student Member, IEEE Abstract -- A framework of security-constrained adequacy evaluation (SCAE electric load while satisfying security constraints. It encompasses three main steps: (a) critical

  11. PRODUCTION PLANNING BASED ON RELIABILITY MODELS FOR PART REUSE

    E-Print Network [OSTI]

    Shu, Lily H.

    PRODUCTION PLANNING BASED ON RELIABILITY MODELS FOR PART REUSE Takeshi Murayama, Hiroshi Obata, Canada Abstract: This paper describes a production planning procedure addressing the issue that the timings and quantities of returned products and reusable components included in them is unknown

  12. Flexible Error Protection for Energy Efficient Reliable Architectures Timothy Miller

    E-Print Network [OSTI]

    Xuan, Dong

    Flexible Error Protection for Energy Efficient Reliable Architectures Timothy Miller , Nagarjuna and Computer Engineering The Ohio State University {millerti,teodores}@cse.ohio-state.edu, nagarjun. To deal with these com- peting trends, energy-efficient solutions are needed to deal with reli- ability

  13. Developing Improved Travel Time Reliability Measures For Real-time

    E-Print Network [OSTI]

    Bertini, Robert L.

    reliability Use for prioritizing improvements Outline #12; 95th Percentile Travel Time Travel Time Index: mean travel time divided by free flow travel time Buffer Index: difference between 95th percentile travel time and mean travel time, divided by mean travel time Planning Time Index: 95th percentile

  14. Toward Reliable and Efficient Reporting in Wireless Sensor Networks

    E-Print Network [OSTI]

    Boutaba, Raouf

    Bouabdallah, and Raouf Boutaba, Senior Member, IEEE Abstract--Energy efficiency is one of the major concerns and as the first main contribution, we derive the optimal number of reporting nodes Nopt energy that minimizes the energy consumed to report reliably the occurrence of an event. In other words, we prove that limiting

  15. Estimation of Degradation-Based Reliability in Outdoor Environments

    E-Print Network [OSTI]

    Estimation of Degradation-Based Reliability in Outdoor Environments Victor Chan and William Q degradation of materials or products that are exposed to the outdoor environment. There is a growing need to obtain timely predictions of such degradation behaviors on the basis of accelerated laboratory tests

  16. "Reliability Inference Based on Multistate and Degradation Models"

    E-Print Network [OSTI]

    Arnold, Jonathan

    "Reliability Inference Based on Multistate and Degradation Models" Vijay Nair Department of extensive covariate information, and the use of multistate and degradation data when available. This talk common models for analyzing degradation data and then describe a class of models based on non

  17. UNCORRECTED Reliability analysis of hybrid ceramic/steel gun barrels

    E-Print Network [OSTI]

    Grujicic, Mica

    UNCORRECTED PROOF Reliability analysis of hybrid ceramic/steel gun barrels M. GRUJICIC1 , J. R. Optimization of the main design, materials and processing parameters in order to minimize the failure. To achieve the aforementioned range, accuracy and impact energy objectives, new generations of advanced guns

  18. Thermal Reliability Study of Bypass Diodes in Photovoltaic Modules (Poster)

    SciTech Connect (OSTI)

    Zhang, Z.; Wohlgemuth, J.; Kurtz, S.

    2013-05-01T23:59:59.000Z

    This paper presents the result of high-temperature durability and thermal cycling testing and analysis for the selected diodes to study the detail of the thermal design and relative long-term reliability of the bypass diodes used to limit the detrimental effects of module hot-spot susceptibility.

  19. Bandwidth assignment for reliable fixed broadband wireless Grit Claen

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    linear programming (ILP) counterparts. We further propose cutset-based valid inequalities to enhanceBandwidth assignment for reliable fixed broadband wireless networks Grit Claßen Lehrstuhl II f of data routing and bandwidth assignment that minimizes the total renewal fees of licenses. This problem

  20. TEACHING DURABILITY IN AUTOMOTIVE APPLICATIONS USING A RELIABILITY

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , initially developed in the automotive industry and since extended to the aeronautical and mechanical a probabilistic method, initially developed in the automotive industry and since extended to the aeronautical1 TEACHING DURABILITY IN AUTOMOTIVE APPLICATIONS USING A RELIABILITY APPROACH Anne Morel (1), André

  1. Accident Sequence Evaluation Program: Human reliability analysis procedure

    SciTech Connect (OSTI)

    Swain, A.D.

    1987-02-01T23:59:59.000Z

    This document presents a shortened version of the procedure, models, and data for human reliability analysis (HRA) which are presented in the Handbook of Human Reliability Analysis With emphasis on Nuclear Power Plant Applications (NUREG/CR-1278, August 1983). This shortened version was prepared and tried out as part of the Accident Sequence Evaluation Program (ASEP) funded by the US Nuclear Regulatory Commission and managed by Sandia National Laboratories. The intent of this new HRA procedure, called the ''ASEP HRA Procedure,'' is to enable systems analysts, with minimal support from experts in human reliability analysis, to make estimates of human error probabilities and other human performance characteristics which are sufficiently accurate for many probabilistic risk assessments. The ASEP HRA Procedure consists of a Pre-Accident Screening HRA, a Pre-Accident Nominal HRA, a Post-Accident Screening HRA, and a Post-Accident Nominal HRA. The procedure in this document includes changes made after tryout and evaluation of the procedure in four nuclear power plants by four different systems analysts and related personnel, including human reliability specialists. The changes consist of some additional explanatory material (including examples), and more detailed definitions of some of the terms. 42 refs.

  2. Continuously Optimized Reliable Energy (CORE) Microgrid: Models & Tools (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-07-01T23:59:59.000Z

    This brochure describes Continuously Optimized Reliable Energy (CORE), a trademarked process NREL employs to produce conceptual microgrid designs. This systems-based process enables designs to be optimized for economic value, energy surety, and sustainability. Capabilities NREL offers in support of microgrid design are explained.

  3. RF-MEMS capacitive switches with high reliability

    DOE Patents [OSTI]

    Goldsmith, Charles L.; Auciello, Orlando H.; Carlisle, John A.; Sampath, Suresh; Sumant, Anirudha V.; Carpick, Robert W.; Hwang, James; Mancini, Derrick C.; Gudeman, Chris

    2013-09-03T23:59:59.000Z

    A reliable long life RF-MEMS capacitive switch is provided with a dielectric layer comprising a "fast discharge diamond dielectric layer" and enabling rapid switch recovery, dielectric layer charging and discharging that is efficient and effective to enable RF-MEMS switch operation to greater than or equal to 100 billion cycles.

  4. Solar reliability and materials library. Volume 2. User's manual

    SciTech Connect (OSTI)

    Singh, H.; Wolosewicz, R.M.; Singh, I.

    1980-09-01T23:59:59.000Z

    This user's manual is the second of two volumes documenting the solar reliability and materials program (SRMP) library at Argonne National Laboratory (ANL). The first volume presents an overview of the solar reliability and materials library. This volume describes the data card formats, identification codes, and dictionaries used in recording data and compiling reliability statistics on solar energy systems. The library is structured around the solar heating and cooling system demonstration sites sponsored by the Department of Energy (DOE). Sufficient flexibility has been built into the coding plan to expand the library to include other solar energy systems. As with any reliability library, the structure will change with time and the needs of the solar energy community. As changes in structure occur, updated editions of the user's manual will be issued to incorporate them. Some of the programs that have been developed using the Statistical Analysis System (SAS) processor are presented to indicate the steps to be followed in linking the various SAS procedures into a production algorithm. Because SAS is a versatile system, other programs and outputs can be generated.

  5. Energy-aware scheduling under reliability and makespan constraints

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Energy-aware scheduling under reliability and makespan constraints Guillaume Aupy, Anne Benoit and complementary. I. INTRODUCTION Energy-aware scheduling has proven an important issue in the past decade, both this interval at speed f. Energy-aware scheduling aims at minimizing the energy consumed during the execution

  6. Energy-aware scheduling under reliability and makespan constraints

    E-Print Network [OSTI]

    Aupy, Guillaume; Robert, Yves

    2011-01-01T23:59:59.000Z

    We consider a task graph to be executed on a set of homogeneous processors. We aim at minimizing the energy consumption while enforcing two constraints: a prescribed bound on the execution time or makespan), and a reliability threshold. Dynamic voltage and frequency scaling (DVFS) is a model frequently used to reduce the energy consumption of a schedule, but it has negative effect on its reliability. In this work, to improve the reliability of a schedule while reducing the energy consumption, we allow for the re-execution of some tasks. We assess the complexity of the tri-criteria scheduling problem (makespan, reliability, energy) with two different speed models: either processors can have arbitrary speeds (continuous speeds), or a processor can run at a finite number of different speeds, and it can change its speed during a computation. We propose several novel tri-criteria scheduling heuristics under the continuous speed model, and we evaluate them through a set of simulations. Our two best heuristics turn ...

  7. 1/30/2004 1 Reliable Return Address Stack

    E-Print Network [OSTI]

    Kaeli, David R.

    or if the function entry address is not available yet 1/30/2004 8 A R entry return RAS O entry exit APT Program Check for direct recursion Push onto RAS APT table: Record entry/exit address pairs of called entries ­ Multithreading ­ Speculative execution ­ Non-LIFO function calls 1/30/2004 7 Solution: Reliable

  8. Fault-Tolerant and Reliable Computation in Cloud Computing

    E-Print Network [OSTI]

    Deng, Jing

    Fault-Tolerant and Reliable Computation in Cloud Computing Jing Deng Scott C.-H. Huang Yunghsiang S, Taipei, 106 Taiwan. § Intelligent Automation, Inc., Rockville, MD, USA. Abstract-- Cloud computing of scientific computation in cloud computing. We investigate a cloud selection strategy to decompose the matrix

  9. Improving Work Flow Reliability Proceedings IGLC-7 275

    E-Print Network [OSTI]

    Tommelein, Iris D.

    , load, productivity, project planning and control, reliability, throughput, variability. 1 Director driven for speed. The production plans of upstream PUs is one source of information regarding work flow to significantly improve project performance because it allows the application of planning to production. If you

  10. RELIABILITY OF SAMPLING INSPECTION SCHEMES APPLIED TO REPLACEMENT STEAM GENERATORS

    E-Print Network [OSTI]

    Cizelj, Leon

    RELIABILITY OF SAMPLING INSPECTION SCHEMES APPLIED TO REPLACEMENT STEAM GENERATORS Guy Roussel the size of the random sample of tubes to be inspected in replacement steam generators is revisited in this paper. A procedure to estimate the maximum number of defective tubes left in the steam generator after

  11. Challenges in Modeling the Degradation of Ceramic Waste Forms

    SciTech Connect (OSTI)

    Devanathan, Ramaswami; Gao, Fei; Sun, Xin

    2011-09-01T23:59:59.000Z

    We identify the state of the art, gaps in current understanding, and key research needs in the area of modeling the long-term degradation of ceramic waste forms for nuclear waste disposition. The directed purpose of this report is to define a roadmap for Waste IPSC needs to extend capabilities of waste degradation to ceramic waste forms, which overlaps with the needs of the subconsinuum scale of FMM interests. The key knowledge gaps are in the areas of (i) methodology for developing reliable interatomic potentials to model the complex atomic-level interactions in waste forms; (ii) characterization of water interactions at ceramic surfaces and interfaces; and (iii) extension of atomic-level insights to the long time and distance scales relevant to the problem of actinide and fission product immobilization.

  12. SSRL Computer Account Request Form

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

    SSRLLCLS Computer Account Request Form August 2009 Fill in this form and sign the security statement mentioned at the bottom of this page to obtain an account. Your Name:...

  13. 2011 Regional Competitions Student Forms

    E-Print Network [OSTI]

    Miami, University of

    records. If your team advances to the NOSB Finals, these forms will be required and you may resend.nosb.org Student Medical Information and Emergency Notification Form Name:_________________________________________ Phone Number:______________________ Medical Conditions or Previous Surgery

  14. Project Approval Form Concentration in

    E-Print Network [OSTI]

    Goldberg, Bennett

    Project Approval Form Concentration in Nanotechnology Return completed form to ENG Undergraduate of Graduation:____________________________ Instructions: Please check one of the following ways in which you Plan to complete the project as a requirement for the concentration in Nanotechnology. Depending upon

  15. Assessor Training NVLAP Assessment Forms

    E-Print Network [OSTI]

    NVLAP Assessor Training NVLAP Assessment Forms #12;Assessor Training 2009: NVLAP Assessment Forms 2 Summary ·Test Method Review Summary ·ProgramSpecific Checklists Examples #12;Assessor Training 2009: NVLAP are completed · Assessor Names, Dates, Lab Code #12;Assessor Training 2009: NVLAP Assessment Forms 4 NIST

  16. NORTHWESTERN UNIVERSITY ACCIDENT REPORT FORM

    E-Print Network [OSTI]

    Shahriar, Selim

    NORTHWESTERN UNIVERSITY ACCIDENT REPORT FORM Whenever a University vehicle sustains damage of any kind, or is involved in an accident which results in personal injury or property damage, this accident that this form is for University Use Only and is not meant to supersede the official state accident report form

  17. INTERNATIONAL STUDENT FINANCIAL DOCUMENTATION FORM

    E-Print Network [OSTI]

    Barrash, Warren

    INTERNATIONAL STUDENT FINANCIAL DOCUMENTATION FORM This form is not an application for financial assistance. This form is REQUIRED before we can provide immigration documents, even if your government, photocopied or faxed supporting financial documents. **List your name as it appears on your passport** Family

  18. INTERNATIONAL STUDENT FINANCIAL DOCUMENTATION FORM

    E-Print Network [OSTI]

    Barrash, Warren

    INTERNATIONAL STUDENT FINANCIAL DOCUMENTATION FORM Please complete this form if you this form and supporting financial documents after you have received your admissions decision. To receive will come from that source. Please attach supporting financial support documents that are less than six

  19. INTERNATIONAL STUDENT FINANCIAL DOCUMENTATION FORM

    E-Print Network [OSTI]

    Barrash, Warren

    INTERNATIONAL STUDENT FINANCIAL DOCUMENTATION FORM Please complete this form if you this form and supporting financial documents after you have received your admissions decision. To receive will come from that source. Please attach original supporting financial support documents, issued in English

  20. The Effect of Humidity on the Reliability of a Surface Micromachined Microengine

    SciTech Connect (OSTI)

    Dugger, M.T.; Eaton, W.P.; Irwin, L.W.; Miller, S.L.; Miller, W.M.; Smith, N.F.; Tanner, D.M.; Walraven, J.A.

    1999-02-02T23:59:59.000Z

    Humidity is shown to be a strong factor in the wear of rubbing surfaces in polysilicon micromachines. We demonstrate that very low humidity can lead to very high wear without a significant change in reliability. We show that the volume of wear debris generated is a function of the humidity in an air environment. As the humidity decreases, the wear debris generated increases. For the higher humidity levels, the formation of surface hydroxides may act as a lubricant. The dominant failure mechanism has been identified as wear. The wear debris has been identified as amorphous oxidized silicon. Large slivers (approximately 1 micron in length) of debris observed at the low humidity level were also amorphous oxidized silicon. Using transmission electron microscopy, we observed that the wear debris forms spherical and rod-like shapes. We compared two surface treatment processes: a fluorinated si- lane chain, (FITl) and supercritical C02 dried (SCC02). The microengines using the SCC02 process were found to be less reliable than those released with the FIX process under two humidity levels.

  1. The Cognitive Environment Simulation as a tool for modeling human performance and reliability

    SciTech Connect (OSTI)

    Woods, D.D. (Ohio State Univ., Columbus, OH (USA). Cognitive Systems Engineering Lab.); Pople, H.E. Jr. (Seer Systems (USA)); Roth, E.M. (Westinghouse Electric Corp., Pittsburgh, PA (USA). Science and Technology Center)

    1990-06-01T23:59:59.000Z

    The US Nuclear Regulatory Commission is sponsoring a program to develop improved methods to model the cognitive behavior of nuclear power plant (NPP) personnel. A tool called Cognitive Environment Simulation (CES) was developed for simulating how people form intentions to act in NPP emergencies. CES provides an analytic tool for exploring plausible human responses in emergency situations. In addition a methodology called Cognitive Reliability Assessment Technique (CREATE) was developed that describes how CES can be used to provide input to human reliability analyses (HRA) in probabilistic risk assessment (PRA) studies. This report describes the results of three activities that were performed to evaluate CES/CREATE: (1) A technical review was conducted by a panel of experts in cognitive modeling, PRA and HRA; (2) CES was exercised on steam generator tube rupture incidents for which data on operator performance exist; (3) a workshop with HRA practitioners was held to analyze a worked example'' of the CREATE methodology. The results of all three evaluations indicate that CES/CREATE is a promising approach for modeling intention formation. Volume 1 provides a summary of the results. This document, Volume 2, provides details on the three evaluations, including the CES computer outputs for the tube rupture events. 18 refs., 9 figs., 5 tabs.

  2. The Cognitive Environment Simulation as a tool for modeling human performance and reliability

    SciTech Connect (OSTI)

    Woods, D.D. (Ohio State Univ., Columbus, OH (USA). Cognitive Systems Engineering Lab.); Pople, H.E. Jr. (Seer Systems (USA)); Roth, E.M. (Westinghouse Electric Corp., Pittsburgh, PA (USA). Science and Technology Center)

    1990-06-01T23:59:59.000Z

    The US Nuclear Regulatory Commission is sponsoring a program to develop improved methods to model the cognitive behavior of nuclear power plant (NPP) personnel. A tool called Cognitive Environment Simulation (CES) was developed for simulating how people form intentions to act in NPP emergencies. CES provides an analytic tool for exploring plausible human response in emergency situations. In addition a methodology called Cognitive Reliability Assessment Technique (CREATE) was developed that describes how CES can be used to provide input to human reliability analyses (HRA) in probabilistic risk assessment (PRA) studies. This report describes the results of three activities that were performed to evaluate CES/CREATE: (1) A technical review was conducted by a panel of experts in cognitive modeling, PRA and HRA; (2) CES was exercised on steam generator tube rupture incidents for which data on operator performance exist; (3) a workshop with HRA practitioners was held to analyze a worked example'' of the CREATE methodology. The results of all three evaluations indicate that CES/CREATE is a promising approach for modeling intention formation. This document, Volume 1 provides a summary of the results. Volume 2 provides details on three evaluations, including the CES computer outputs for the tube rupture events. 14 refs., 3 figs.

  3. FormLink/FeynCalcFormLink : Embedding FORM in Mathematica and FeynCalc

    E-Print Network [OSTI]

    Feng Feng; Rolf Mertig

    2012-12-17T23:59:59.000Z

    FORM, a symbolic manipulation system, has been widely used in a lot of calculations for High Energy Physics due to its high performance and fficient design. Mathematica, another computational software program, has also widely been used, but more for reasons of generality and user-friendliness than for speed. Especially calculations involving tensors and noncommutative operations like calculating Dirac traces can be rather slow in Mathematica, compared to FORM. In this article we describe FormLink and FeynCalcFormLink, two Mathematica packages to link Mathematica and FeynCalc with FORM. FormLink can be used without FeynCalc and FeynCalcFormLink, which is an extension loading FormLink and FeynCalc automatically. With these two packages the impressive speed and other special features of FORM get embedded into the generality of Mathematica and FeynCalc in a simple manner. FeynCalcFormLink provides a FORM-based turbo for FeynCalc, making it much more efficient. FormLink turns Mathematica into an editor and code organizer for FORM.

  4. The Reliability Investigation on ACSR Splice Connector Systems Used in Overhead Power transmission Lines

    SciTech Connect (OSTI)

    Wang, Jy-An John [ORNL] [ORNL; Jiang, Hao [ORNL] [ORNL; Ren, Fei [ORNL] [ORNL

    2012-01-01T23:59:59.000Z

    Due to material discontinuity and inherited forming mechanism from a crimped-type splice connector, the associated conductor-connector system is highly sensitive to system components aging, especially during high-temperature operations. Furthermore, due to the increase in power demand and limited investment in new infrastructure, existing overhead power transmission lines often need to operate at temperatures higher than the original designed values. This has led to the accelerated aging and degradation of conductor-connector systems. The implications of connector aging are two-fold: (1) significant increase in resistivity of the splice connector and (2) significant reduction in the connector clamping strength. Therefore, splice connectors are one of the weakest links in the electric power transmission infrastructure. In this paper we will discuss the reliability of splice connector systems, including both single stage and two stage splice connectors, used in ACSR conductor of transmission lines under high temperature operations.

  5. Tungsten coating for improved wear resistance and reliability of microelectromechanical devices

    DOE Patents [OSTI]

    Fleming, James G. (Albuquerque, NM); Mani, Seethambal S. (Albuquerque, NM); Sniegowski, Jeffry J. (Edgewood, NM); Blewer, Robert S. (Albuquerque, NM)

    2001-01-01T23:59:59.000Z

    A process is disclosed whereby a 5-50-nanometer-thick conformal tungsten coating can be formed over exposed semiconductor surfaces (e.g. silicon, germanium or silicon carbide) within a microelectromechanical (MEM) device for improved wear resistance and reliability. The tungsten coating is formed after cleaning the semiconductor surfaces to remove any organic material and oxide film from the surface. A final in situ cleaning step is performed by heating a substrate containing the MEM device to a temperature in the range of 200-600 .degree. C. in the presence of gaseous nitrogen trifluoride (NF.sub.3). The tungsten coating can then be formed by a chemical reaction between the semiconductor surfaces and tungsten hexafluoride (WF.sub.6) at an elevated temperature, preferably about 450.degree. C. The tungsten deposition process is self-limiting and covers all exposed semiconductor surfaces including surfaces in close contact. The present invention can be applied to many different types of MEM devices including microrelays, micromirrors and microengines. Additionally, the tungsten wear-resistant coating of the present invention can be used to enhance the hardness, wear resistance, electrical conductivity, optical reflectivity and chemical inertness of one or more semiconductor surfaces within a MEM device.

  6. Reliability estimates for selected sensors in fusion applications

    SciTech Connect (OSTI)

    Cadwallader, L.C.

    1996-09-01T23:59:59.000Z

    This report presents the results of a study to define several types of sensors in use, the qualitative reliability (failure modes) and quantitative reliability (average failure rates) for these types of process sensors. Temperature, pressure, flow, and level sensors are discussed for water coolant and for cryogenic coolants. The failure rates that have been found are useful for risk assessment and safety analysis. Repair times and calibration intervals are also given when found in the literature. All of these values can also be useful to plant operators and maintenance personnel. Designers may be able to make use of these data when planning systems. The final chapter in this report discusses failure rates for several types of personnel safety sensors, including ionizing radiation monitors, toxic and combustible gas detectors, humidity sensors, and magnetic field sensors. These data could be useful to industrial hygienists and other safety professionals when designing or auditing for personnel safety.

  7. Issues in benchmarking human reliability analysis methods : a literature review.

    SciTech Connect (OSTI)

    Lois, Erasmia (US Nuclear Regulatory Commission); Forester, John Alan; Tran, Tuan Q. (Idaho National Laboratory, Idaho Falls, ID); Hendrickson, Stacey M. Langfitt; Boring, Ronald L. (Idaho National Laboratory, Idaho Falls, ID)

    2008-04-01T23:59:59.000Z

    There is a diversity of human reliability analysis (HRA) methods available for use in assessing human performance within probabilistic risk assessment (PRA). Due to the significant differences in the methods, including the scope, approach, and underlying models, there is a need for an empirical comparison investigating the validity and reliability of the methods. To accomplish this empirical comparison, a benchmarking study is currently underway that compares HRA methods with each other and against operator performance in simulator studies. In order to account for as many effects as possible in the construction of this benchmarking study, a literature review was conducted, reviewing past benchmarking studies in the areas of psychology and risk assessment. A number of lessons learned through these studies are presented in order to aid in the design of future HRA benchmarking endeavors.

  8. Some results of studies of system reliability in power engineering

    SciTech Connect (OSTI)

    Rudenko, Y.N.

    1984-01-01T23:59:59.000Z

    In 1973 the Scientific Council on Indicated Problems of Power Engineering of the Division of Physicotechnical Problems of Power Engineering (OFTPE) of the AS USSR set up the permanent scientific seminar on the topic of ''Methodological Questions of Research on the Reliability of Large Energy Systems.'' The Siberian Energy Institute (SEI) of the Siberian Branch of the AS USSR was designated the base organization. The principal goals of the seminar are: discussion, analysis, and evaluation of the most interesting results of research in the field of energy-system reliability as well as suggestions relevant to their practical employment in the national economy; the exchange of opinions on the latest achievements and controversial questions associated with solution of this problem; comparison of Soviet and foreign levels of research in this area; discussion of problems and formulation of viewpoints concerning the most urgent trends in future research and, on this basis, the coordination of investigations into this subject.

  9. Reliability and Maintainability Issues for the Next Linear Collider

    SciTech Connect (OSTI)

    Wilson, Zane J.; Gold, Saul L.; Koontz, Ron F.; Lavine, Ted L.; /SLAC

    2011-08-26T23:59:59.000Z

    Large accelerators for high energy physics research traditionally have been designed using informal best design, engineering, and management practices to achieve acceptable levels of operational availability. However, the Next Linear Collider(NLC) project presents a particular challenge for operational availability due to the unprecedented size and complexity of the accelerator systems required to achieve the physics goals of high center-of-mass energy and high luminosity. Formal reliability and maintainability analysis, design, and implementation will be required to achieve acceptable operational availability for the high energy physics research program. This paper introduces some of the basic concepts of reliability analysis and applies them to the 2.6-cm microwave power system of the two 10-km-long, 250-GeV linacs that are currently proposed for the NLC design.

  10. How to Estimate the Value of Service Reliability Improvements

    SciTech Connect (OSTI)

    Sullivan, Michael J.; Mercurio, Matthew G.; Schellenberg, Josh A.; Eto, Joseph H.

    2010-06-08T23:59:59.000Z

    A robust methodology for estimating the value of service reliability improvements is presented. Although econometric models for estimating value of service (interruption costs) have been established and widely accepted, analysts often resort to applying relatively crude interruption cost estimation techniques in assessing the economic impacts of transmission and distribution investments. This paper first shows how the use of these techniques can substantially impact the estimated value of service improvements. A simple yet robust methodology that does not rely heavily on simplifying assumptions is presented. When a smart grid investment is proposed, reliability improvement is one of the most frequently cited benefits. Using the best methodology for estimating the value of this benefit is imperative. By providing directions on how to implement this methodology, this paper sends a practical, usable message to the industry.

  11. Statistical Modeling of Photovoltaic Reliability Using Accelerated Degradation Techniques (Poster)

    SciTech Connect (OSTI)

    Lee, J.; Elmore, R.; Jones, W.

    2011-02-01T23:59:59.000Z

    We introduce a cutting-edge life-testing technique, accelerated degradation testing (ADT), for PV reliability testing. The ADT technique is a cost-effective and flexible reliability testing method with multiple (MADT) and Step-Stress (SSADT) variants. In an environment with limited resources, including equipment (chambers), test units, and testing time, these techniques can provide statistically rigorous prediction of lifetime and other interesting parameters, such as failure rate, warranty time, mean time to failure, degradation rate, activation energy, acceleration factor, and upper limit level of stress. J-V characterization can be used for degradation data and the generalized Eyring model can be used for the thermal-humidity stress condition. The SSADT model can be constructed based on the cumulative damage model (CEM), which assumes that the remaining test united are failed according to cumulative density function of current stress level regardless of the history on previous stress levels.

  12. Reliability modeling and evaluation of HVDC power transmission systems

    SciTech Connect (OSTI)

    Dialynas, E.N.; Koskolos, N.C. (National Technical Univ., Athens (Greece). Dept. of Electrical and Computer Engineering)

    1994-04-01T23:59:59.000Z

    The objective of this paper is to present an improved computational method for evaluating the reliability indices of HVdc transmission systems. The developed models and computational techniques are described. These can be used to simulate the operational practices and characteristics of a system under study efficiently and realistically. This method is based on the failure modes and effects analysis and uses the event tree method and the minimal cut set approach to represent the system's operational behavior and deduce the appropriate system's failure modes. A set of five reliability indices is evaluated for each output node being analyzed together with the probability and frequency of encountering particular regions of system performance levels. The analysis of an assumed HVdc bipolar transmission system is also included.

  13. ADVANCED COMPRESSOR ENGINE CONTROLS TO ENHANCE OPERATION, RELIABILITY AND INTEGRITY

    SciTech Connect (OSTI)

    Gary D. Bourn; Jess W. Gingrich; Jack A. Smith

    2004-03-01T23:59:59.000Z

    This document is the final report for the ''Advanced Compressor Engine Controls to Enhance Operation, Reliability, and Integrity'' project. SwRI conducted this project for DOE in conjunction with Cooper Compression, under DOE contract number DE-FC26-03NT41859. This report addresses an investigation of engine controls for integral compressor engines and the development of control strategies that implement closed-loop NOX emissions feedback.

  14. Final report : testing and evaluation for solar hot water reliability.

    SciTech Connect (OSTI)

    Caudell, Thomas P. (University of New Mexico, Albuquerque, NM) [University of New Mexico, Albuquerque, NM; He, Hongbo (University of New Mexico, Albuquerque, NM) [University of New Mexico, Albuquerque, NM; Menicucci, David F. (Building Specialists, Inc., Albuquerque, NM) [Building Specialists, Inc., Albuquerque, NM; Mammoli, Andrea A. (University of New Mexico, Albuquerque, NM) [University of New Mexico, Albuquerque, NM; Burch, Jay (National Renewable Energy Laboratory, Golden CO) [National Renewable Energy Laboratory, Golden CO

    2011-07-01T23:59:59.000Z

    Solar hot water (SHW) systems are being installed by the thousands. Tax credits and utility rebate programs are spurring this burgeoning market. However, the reliability of these systems is virtually unknown. Recent work by Sandia National Laboratories (SNL) has shown that few data exist to quantify the mean time to failure of these systems. However, there is keen interest in developing new techniques to measure SHW reliability, particularly among utilities that use ratepayer money to pay the rebates. This document reports on an effort to develop and test new, simplified techniques to directly measure the state of health of fielded SHW systems. One approach was developed by the National Renewable Energy Laboratory (NREL) and is based on the idea that the performance of the solar storage tank can reliably indicate the operational status of the SHW systems. Another approach, developed by the University of New Mexico (UNM), uses adaptive resonance theory, a type of neural network, to detect and predict failures. This method uses the same sensors that are normally used to control the SHW system. The NREL method uses two additional temperature sensors on the solar tank. The theories, development, application, and testing of both methods are described in the report. Testing was performed on the SHW Reliability Testbed at UNM, a highly instrumented SHW system developed jointly by SNL and UNM. The two methods were tested against a number of simulated failures. The results show that both methods show promise for inclusion in conventional SHW controllers, giving them advanced capability in detecting and predicting component failures.

  15. Reliability analysis of electric power systems including time dependent sources 

    E-Print Network [OSTI]

    Kim, Younjong

    1987-01-01T23:59:59.000Z

    Chairman of Advisory Committee: Chanan Singh A method for reliability analysis of electric power systems with time dependent sources, such as photovoltaic and wind generation, is introduced. The fluctuating characteristic of unconventional generation... and active solar. wind, geothermal, and hydropower. Of all the renewable energy technologies that have been the focus of encouraging government and private R k D efforts, photovoltaic generation and wind turbine generation appear to be the leading...

  16. Natural streamflow cycles and effects on water supply reliability

    E-Print Network [OSTI]

    Felden, Fabrice

    2002-01-01T23:59:59.000Z

    ABSTRACT Natural Streamf low Cycles and Effects on Water Supply Reliability. (August 2002) Fabrice Felden, Diploma de I'Ecole Speciale des Travaux Publics Chair of Advisory Committee: Dr. Ralph A. Wurbs The Texas Natural Resource Conservation... and cycles in streamflows that could be directly correlated to climate changes. The presence of trends and/or cycles in streamflows is primarily studied to assess the significance of not directly considering climate change in the Texas Water Availability...

  17. Reliability, Availability and Maintainability Considerations for Gas Turbine Cogeneration Systems

    E-Print Network [OSTI]

    Meher-Homji, C. B.; Focke, A. B.

    1984-01-01T23:59:59.000Z

    RELIABILITY, AVAILABILITY AND MAINTAINABILITY CONSIDERATIONS FOR GAS TURBINE COGENERATION SYSTEMS Gyrus B. Meher-Homji and Alfred B. Focke Boyce Engineering International, Inc. Houston, Texas ABSTRACT The success of a cogeneration system... the choice of the number of gas turbines and waste heat recovery units to be utilized down to small components, such as pumps, dampers, hea t exchangers and auxiliary systems. . Rand M studies must be initiated in the conceptual phases of the project...

  18. Gearbox Reliability Collaborative High-Speed Shaft Calibration

    SciTech Connect (OSTI)

    Keller, J.; McNiff, B.

    2014-09-01T23:59:59.000Z

    Instrumentation has been added to the high-speed shaft, pinion, and tapered roller bearing pair of the Gearbox Reliability Collaborative gearbox to measure loads and temperatures. The new shaft bending moment and torque instrumentation was calibrated and the purpose of this document is to describe this calibration process and results, such that the raw shaft bending and torque signals can be converted to the proper engineering units and coordinate system reference for comparison to design loads and simulation model predictions.

  19. Reliable renewable energy for a new electric infrastructure.

    SciTech Connect (OSTI)

    Hanley, Charles J.

    2010-05-01T23:59:59.000Z

    This is workshop is about methodologies, tools, techniques, models, training, codes and standards, etc., that can improve reliability of systems while reducing costs. We've intentionally scaled back on presentation time to allow more time for interaction. Sandia's PV Program Vision - Recognition as a world-class facility to develop and integrate new photovoltaic components, systems, and architectures for the future of our electric/energy delivery systems.

  20. Wind Farm Diversification and Its Impact on Power System Reliability

    E-Print Network [OSTI]

    Degeilh, Yannick

    2010-10-12T23:59:59.000Z

    of potential wind farming sites for which the wind patterns are statistically known. The objective is to demonstrate the benefits of diversification for the reliability of wind-sustained systems through the search for steadier overall power outputs. Three... power output. Reported studies are generally concerned about the selection of a given potential wind farming site based on its wind patterns [1], but not about the beneficial interactions that various power outputs from various wind parks may yield...

  1. Achieving High Reliability Operations Through Multi-Program Integration

    SciTech Connect (OSTI)

    Holly M. Ashley; Ronald K. Farris; Robert E. Richards

    2009-04-01T23:59:59.000Z

    Over the last 20 years the Idaho National Laboratory (INL) has adopted a number of operations and safety-related programs which has each periodically taken its turn in the limelight. As new programs have come along there has been natural competition for resources, focus and commitment. In the last few years, the INL has made real progress in integrating all these programs and are starting to realize important synergies. Contributing to this integration are both collaborative individuals and an emerging shared vision and goal of the INL fully maturing in its high reliability operations. This goal is so powerful because the concept of high reliability operations (and the resulting organizations) is a masterful amalgam and orchestrator of the best of all the participating programs (i.e. conduct of operations, behavior based safety, human performance, voluntary protection, quality assurance, and integrated safety management). This paper is a brief recounting of the lessons learned, thus far, at the INL in bringing previously competing programs into harmony under the goal (umbrella) of seeking to perform regularly as a high reliability organization. In addition to a brief diagram-illustrated historical review, the authors will share the INL’s primary successes (things already effectively stopped or started) and the gaps yet to be bridged.

  2. Gearbox Reliability Collaborative Phase 3 Gearbox 2 Test Plan

    SciTech Connect (OSTI)

    Link, H.; Keller, J.; Guo, Y.; McNiff, B.

    2013-04-01T23:59:59.000Z

    Gearboxes in wind turbines have not been achieving their expected design life even though they commonly meet or exceed the design criteria specified in current design standards. One of the basic premises of the National Renewable Energy Laboratory (NREL) Gearbox Reliability Collaborative (GRC) is that the low gearbox reliability results from the absence of critical elements in the design process or insufficient design tools. Key goals of the GRC are to improve design approaches and analysis tools and to recommend practices and test methods resulting in improved design standards for wind turbine gearboxes that lower the cost of energy (COE) through improved reliability. The GRC uses a combined gearbox testing, modeling and analysis approach, along with a database of information from gearbox failures collected from overhauls and investigation of gearbox condition monitoring techniques to improve wind turbine operations and maintenance practices. Testing of Gearbox 2 (GB2) using the two-speed turbine controller that has been used in prior testing. This test series will investigate non-torque loads, high-speed shaft misalignment, and reproduction of field conditions in the dynamometer. This test series will also include vibration testing using an eddy-current brake on the gearbox's high speed shaft.

  3. Managing electricity reliability risk through the futures markets

    SciTech Connect (OSTI)

    Siddiqui, Afzal S.

    2000-10-01T23:59:59.000Z

    In competitive electricity markets, the vertically integrated utilities that were responsible for ensuring system reliability in their own service territories, or groups of territories, often cease to exist. Typically, the burden falls to an independent system operator (ISO) to insure that enough ancillary services (AS) are available for safe, stable, and reliable operation of the grid, typically defined, in part, as compliance with officially approved engineering specifications for minimum levels of AS. In order to characterize the behavior of market participants (generators, retailers, and an ISO) in a competitive electricity market with reliability requirements, we model a spot market for electricity and futures markets for both electricity and AS. By assuming that each participant seeks to maximize its expected utility of wealth and that all markets clear, we solve for the optional quantities of electricity and AS traded in each market by all participants, as well as the corresponding market-clearing prices. We show that future prices for both electricity and AS depend on expectations of the spot price, statistical aspects of system demand, and production cost parameters. More important, our model captures the fact that electricity and AS are substitute products for the generators, implying that anticipated changes in the spot market will affect the equilibrium futures positions of both electricity and AS. We apply our model to the California electricity and AS markets to test its viability.

  4. Stochastic PV performance/reliability model : preview of alpha version.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Miller, Steven P.

    2010-03-01T23:59:59.000Z

    Problem Statement: (1) Uncertainties in PV system performance and reliability impact business decisions - Project cost and financing estimates, Pricing service contracts and guarantees, Developing deployment and O&M strategies; (2) Understanding and reducing these uncertainties will help make the PV industry more competitive (3) Performance has typically been estimated without much attention to reliability of components; and (4) Tools are needed to assess all inputs to the value proposition (e.g., LCOE, cash flow, reputation, etc.). Goals and objectives are: (1) Develop a stochastic simulation model (in GoldSim) that can represent PV system performance as a function of system design, weather, reliability, and O&M policies; (2) Evaluate performance for an example system to quantify sources of uncertainty and identify dominant parameters via a sensitivity study; and (3) Example System - 1 inverter, 225 kW DC Array latitude tilt (90 strings of 12 modules {l_brace}1080 modules{r_brace}), Weather from Tucumcari, NM (TMY2 with annual uncertainty).

  5. PV Module Reliability R&D Project Overview

    SciTech Connect (OSTI)

    Hulstrom, R. L.

    2005-01-01T23:59:59.000Z

    The DOE Solar Energy Technologies Program includes a sub-key activity entitled ''Photovoltaic Module Reliability R&D''. This activity has been in existence for several years to help ensure that the PV technologies that advance to the commercial module stage have acceptable service lifetimes and annual performance degradation rates. The long-term (2020) goal, as stated in the Solar Program Multi-Year Technical Plan [1], is to assist industry with the development of PV systems that have 30-year service lifetimes and 1% annual performance degradation rates. The corresponding module service lifetimes and annual performance degradation rate would have to be 30 years lifetime and approximately 0.5% (or less, depending on the type of PV system) annual performance degradation. Reaching this goal is critical to achieving the PV technology Levelized Energy Cost Targets, as listed and described in the Solar Program Multi-Year Technical Plan. This paper is an overview of the Module Reliability R&D sub-key activity. More details and the major results and accomplishments are covered in the papers presented in the PV Module Reliability Session of the DOE Solar Energy Technology Review Meeting, October 25-28, 2004, in Denver, Colorado.

  6. Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model

    E-Print Network [OSTI]

    David P. Chassin; Christian Posse

    2005-03-11T23:59:59.000Z

    The reliability of electric transmission systems is examined using a scale-free model of network structure and failure propagation. The topologies of the North American eastern and western electric networks are analyzed to estimate their reliability based on the Barabasi-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using standard power system reliability analysis methods, and they suggest that scale-free network models are useful for estimating aggregate electric network reliability.

  7. Categorical Exclusion Determination Form Proposed Action Title...

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

    and coordinating distributed energy sources generated by "prosumers," such as wind and solar power, to improve the reliability, efficiency, flexibility, and communications within...

  8. Reliable High Performance Peta- and Exa-Scale Computing

    SciTech Connect (OSTI)

    Bronevetsky, G

    2012-04-02T23:59:59.000Z

    As supercomputers become larger and more powerful, they are growing increasingly complex. This is reflected both in the exponentially increasing numbers of components in HPC systems (LLNL is currently installing the 1.6 million core Sequoia system) as well as the wide variety of software and hardware components that a typical system includes. At this scale it becomes infeasible to make each component sufficiently reliable to prevent regular faults somewhere in the system or to account for all possible cross-component interactions. The resulting faults and instability cause HPC applications to crash, perform sub-optimally or even produce erroneous results. As supercomputers continue to approach Exascale performance and full system reliability becomes prohibitively expensive, we will require novel techniques to bridge the gap between the lower reliability provided by hardware systems and users unchanging need for consistent performance and reliable results. Previous research on HPC system reliability has developed various techniques for tolerating and detecting various types of faults. However, these techniques have seen very limited real applicability because of our poor understanding of how real systems are affected by complex faults such as soft fault-induced bit flips or performance degradations. Prior work on such techniques has had very limited practical utility because it has generally focused on analyzing the behavior of entire software/hardware systems both during normal operation and in the face of faults. Because such behaviors are extremely complex, such studies have only produced coarse behavioral models of limited sets of software/hardware system stacks. Since this provides little insight into the many different system stacks and applications used in practice, this work has had little real-world impact. My project addresses this problem by developing a modular methodology to analyze the behavior of applications and systems during both normal and faulty operation. By synthesizing models of individual components into a whole-system behavior models my work is making it possible to automatically understand the behavior of arbitrary real-world systems to enable them to tolerate a wide range of system faults. My project is following a multi-pronged research strategy. Section II discusses my work on modeling the behavior of existing applications and systems. Section II.A discusses resilience in the face of soft faults and Section II.B looks at techniques to tolerate performance faults. Finally Section III presents an alternative approach that studies how a system should be designed from the ground up to make resilience natural and easy.

  9. Practical reliability and uncertainty quantification in complex systems : final report.

    SciTech Connect (OSTI)

    Grace, Matthew D.; Ringland, James T.; Marzouk, Youssef M. (Massachusetts Institute of Technology, Cambridge, MA); Boggs, Paul T.; Zurn, Rena M.; Diegert, Kathleen V. (Sandia National Laboratories, Albuquerque, NM); Pebay, Philippe Pierre; Red-Horse, John Robert (Sandia National Laboratories, Albuquerque, NM)

    2009-09-01T23:59:59.000Z

    The purpose of this project was to investigate the use of Bayesian methods for the estimation of the reliability of complex systems. The goals were to find methods for dealing with continuous data, rather than simple pass/fail data; to avoid assumptions of specific probability distributions, especially Gaussian, or normal, distributions; to compute not only an estimate of the reliability of the system, but also a measure of the confidence in that estimate; to develop procedures to address time-dependent or aging aspects in such systems, and to use these models and results to derive optimal testing strategies. The system is assumed to be a system of systems, i.e., a system with discrete components that are themselves systems. Furthermore, the system is 'engineered' in the sense that each node is designed to do something and that we have a mathematical description of that process. In the time-dependent case, the assumption is that we have a general, nonlinear, time-dependent function describing the process. The major results of the project are described in this report. In summary, we developed a sophisticated mathematical framework based on modern probability theory and Bayesian analysis. This framework encompasses all aspects of epistemic uncertainty and easily incorporates steady-state and time-dependent systems. Based on Markov chain, Monte Carlo methods, we devised a computational strategy for general probability density estimation in the steady-state case. This enabled us to compute a distribution of the reliability from which many questions, including confidence, could be addressed. We then extended this to the time domain and implemented procedures to estimate the reliability over time, including the use of the method to predict the reliability at a future time. Finally, we used certain aspects of Bayesian decision analysis to create a novel method for determining an optimal testing strategy, e.g., we can estimate the 'best' location to take the next test to minimize the risk of making a wrong decision about the fitness of a system. We conclude this report by proposing additional fruitful areas of research.

  10. Seal for fluid forming tools

    DOE Patents [OSTI]

    Golovashchenko, Sergey Fedorovich (Beverly Hills, MI); Bonnen, John Joseph Francis (Milford, MI)

    2012-03-20T23:59:59.000Z

    An electro-hydraulic forming tool for forming a sheet metal blank in a one-sided die has first and second rigid rings that engage opposite sides of a sheet metal blank. The rigid rings are contained within slots on a die portion and a hydraulic force applicator portion of the forming tool. The seals are either resiliently biased by an elastomeric member or inherently resiliently biased into contact with the blank.

  11. Chevron, GE form Technology Alliance

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

    form Technology Alliance February 3, 2014 HOUSTON, TX, Feb. 3, 2014-Chevron Energy Technology Company and GE Oil & Gas announced today the creation of the Chevron GE Technology...

  12. Method of forming ceramic bricks

    DOE Patents [OSTI]

    Poeppel, R.B.; Claar, T.D.; Silkowski, P.

    1987-04-22T23:59:59.000Z

    A method for forming free standing ceramic bricks for use as tritium breeder material is disclosed. Aqueous solutions of sodium carbonate and potassium carbonate are mixed with an organic hydrocolloid dispersion and powdered lithium carbonate, spray dried, and ceramic bricks formed by molding in a die and firing.

  13. REFERRAL FORM PHONOLOGICAL AWARENESS CLINIC

    E-Print Network [OSTI]

    Hickman, Mark

    REFERRAL FORM PHONOLOGICAL AWARENESS CLINIC Concerns regarding communication Please return this form to: Clinical Administrator Email: clinic@cmds.canterbury.ac.nz Department of Communication Disorders Phone: 03-364-2408 Speech and Hearing Clinic Fax: 03-364-2760 University of Canterbury Private Bag

  14. STUDENT DISCIPLINARY ACTION FORM INSTRUCTIONS

    E-Print Network [OSTI]

    Baltisberger, Jay H.

    STUDENT DISCIPLINARY ACTION FORM INSTRUCTIONS Labor Program Office Berea College While one across campus. The "Student Disciplinary Action Form" was designed to provide labor supervisors directly with the student and discuss the matter in private. Calmly discuss the offense and the corrective

  15. Method of forming ceramic bricks

    DOE Patents [OSTI]

    Poeppel, Roger B. (Glen Ellyn, IL); Claar, Terry D. (Newark, DE); Silkowski, Peter (Urbana, IL)

    1988-01-01T23:59:59.000Z

    A method for forming free standing ceramic bricks for use as tritium breeder material is disclosed. Aqueous solutions of sodium carbonate and potassium carbonate are mixed with an organic hydrocolloid dispersion and powdered lithium carbonate, spray dried, and ceramic bricks formed by molding in a die and firing.

  16. Reliable Downlink Scheduling for Wireless Networks with Real-Time and Non-Real Time Clients

    E-Print Network [OSTI]

    Jain, Abhishek

    2014-08-05T23:59:59.000Z

    reliability to the real time clients, while Round Robin policy provides reliability to the clients but fails to achieve high system throughput in a time-varying wireless network. Apart from these policies, there are scheduling policies which prioritize clients...

  17. The Impact of Protection System Failures on Power System Reliability Evaluation

    E-Print Network [OSTI]

    Jiang, Kai

    2012-11-05T23:59:59.000Z

    The reliability of protection systems has emerged as an important topic because protection failures have critical influence on the reliability of power systems. The goal of this research is to develop novel approaches for modeling and analysis...

  18. Using Empirical Data to Find the Best Measurement for Travel Time Reliability

    E-Print Network [OSTI]

    Alemazkoor, Negin

    2014-08-20T23:59:59.000Z

    benefit from reliable travel times. Thus, the value of reliability (VOR) is beginning to factor into cost/benefit analyses of transportation projects and understanding travelers’ mode and route choices. VOR has almost always been estimated through stated...

  19. Photovoltaic-Reliability R&D Toward a Solar-Powered World (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Granata, J.

    2009-08-01T23:59:59.000Z

    Presentation about the importance of continued progress toward low-cost, high-reliability, and high-performance PV systems. High reliability is an essential element in achieving low-cost solar electricity.

  20. Single-Phase Inverter and Rectifier for High-Reliability Applications

    E-Print Network [OSTI]

    Harb, Souhib

    2014-05-01T23:59:59.000Z

    electronics. Thus, the reliability of power electronics converters becomes a very crucial issue. It is required that the power electronics, used in such environments, have reliability indices, such as lifetime, which match with the source or load one...

  1. Photovoltaic-Reliability R&D Toward a Solar-Powered World: Preprint

    SciTech Connect (OSTI)

    Kurtz, S.; Granata, J.; Quintana, M.

    2009-08-01T23:59:59.000Z

    Paper about the importance of continued progress toward low-cost, high-reliability, and high-performance PV systems. High reliability is an essential element in achieving low-cost solar electricity.

  2. Maximizing Energy Savings Reliability in BC Hydro Industrial Demand-side Management Programs

    E-Print Network [OSTI]

    Victoria, University of

    Maximizing Energy Savings Reliability in BC Hydro Industrial Demand-side Management Programs Supervisory Committee Maximizing Energy Savings Reliability in BC Hydro Industrial Demand-side Management of Environmental Studies) Departmental Member For energy utilities faced with expanded jurisdictional energy

  3. Reliability of a telephone questionnaire measuring diet and activity level in cats

    E-Print Network [OSTI]

    Harbison, Jacque L

    2001-01-01T23:59:59.000Z

    using kappa. Reliability was poor for questions referring to activity level, appetite, body condition, type and brand of treats fed, and table scraps. Reliability was moderate for questions referring to brand of dry and canned foods fed, frequency...

  4. Design, Fabrication, and Reliability Assessment of Embedded Resistors and Capacitors on Multilayered

    E-Print Network [OSTI]

    Swaminathan, Madhavan

    circuit, over 80 percent of the electronic components are passives such as resistors, inductors for discrete components and assembly of same, enhance electrical performance and reliability, and potentiallyDesign, Fabrication, and Reliability Assessment of Embedded Resistors and Capacitors

  5. North American Electricity Infrastructure: System Security, Quality, Reliability, Availability, and Efficiency

    E-Print Network [OSTI]

    Amin, S. Massoud

    many of the complexities of electric power infrastructure and how technological innovation combined1 North American Electricity Infrastructure: System Security, Quality, Reliability, Availability for reliable and disturbance-free electricity. The massive power outages in the United States, Canada, UK

  6. International Journal of Reliability, Quality and Safety Engineering World Scientific Publishing Company

    E-Print Network [OSTI]

    Koopman, Philip

    International Journal of Reliability, Quality and Safety Engineering ©World Scientific Publishing of Reliability, Quality and Safety Engineering ©World Scientific Publishing Company 2 Likewise, application Engineering and The Institute for Complex Engineered Systems Carnegie Mellon University, 5000 Forbes Avenue

  7. Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications

    E-Print Network [OSTI]

    Liberzon, Daniel

    Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications Sairaj V in photovoltaic energy processing applications is presented. The proposed approach acknowledges the influence through several case studies. Index Terms-- Markov reliability modeling, photovoltaic systems, power

  8. Single-Phase Inverter and Rectifier for High-Reliability Applications 

    E-Print Network [OSTI]

    Harb, Souhib

    2014-05-01T23:59:59.000Z

    electronics. Thus, the reliability of power electronics converters becomes a very crucial issue. It is required that the power electronics, used in such environments, have reliability indices, such as lifetime, which match with the source or load one...

  9. RELIABILITY OF WIND POWER FROM DISPERSED SITES: A PRELIMINARY ASSESSMENT

    E-Print Network [OSTI]

    Kahn, E.

    2011-01-01T23:59:59.000Z

    to expect that wind generation will be sufficiently reliableload for the case with wind generation measured at the LOLPcan be displaced by wind generation. tions form the basis

  10. Effect of UV curing time on physical and electrical properties and reliability of low dielectric constant materials

    SciTech Connect (OSTI)

    Kao, Kai-Chieh; Cheng, Yi-Lung, E-mail: yjcheng@ncnu.edu.tw [Department of Electrical Engineering, National Chi-Nan University, Nan-Tou, Taiwan, 545661 (China); Chang, Wei-Yuan; Chang, Yu-Min; Leu, Jihperng [Department of Materials Science and Engineering, National Chiao-Tung University, Hsin-Chu, 30050, Taiwan (China)

    2014-11-01T23:59:59.000Z

    This study comprehensively investigates the effect of ultraviolet (UV) curing time on the physical, electrical, and reliability characteristics of porous low-k materials. Following UV irradiation for various periods, the depth profiles of the chemical composition in the low-k dielectrics were homogeneous. Initially, the UV curing process preferentially removed porogen-related CH{sub x} groups and then modified Si-CH{sub 3} and cage Si-O bonds to form network Si-O bonds. The lowest dielectric constant (k value) was thus obtained at a UV curing time of 300?s. Additionally, UV irradiation made porogen-based low-k materials hydrophobic and to an extent that increased with UV curing time. With a short curing time (<300?s), porogen was not completely removed and the residues degraded reliability performance. A long curing time (>300?s) was associated with improved mechanical strength, electrical performance, and reliability of the low-k materials, but none of these increased linearly with UV curing time. Therefore, UV curing is necessary, but the process time must be optimized for porous low-k materials on back-end of line integration in 45?nm or below technology nodes.

  11. The Impact of Protection System Failures on Power System Reliability Evaluation 

    E-Print Network [OSTI]

    Jiang, Kai

    2012-11-05T23:59:59.000Z

    Figure 6-11. Reliability modeling of power systems with perfect protections. ............ 145 Figure 6-12. Reliability modeling of power systems with protection failures. ............. 146 Figure 6-13. 24-bus IEEE Reliability Test System (RTS... is reprinted from copyrighted material with permission from IEEE. ?2010 IEEE. Reprinted, with permission, from Kai Jiang and Chanan Singh, ?Reliability modeling of all-digital protection systems including impact of repair?? IEEE Trans. Power Delivery, vol...

  12. Performance and Reliability of Bonded Interfaces for High-Temperature Packaging (Presentation)

    SciTech Connect (OSTI)

    Devoto, D.

    2014-06-01T23:59:59.000Z

    This presentation reviews the status of the performance and reliability of bonded interfaces for high-temperature packaging.

  13. forms

    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 ScienceandMesa del SolStrengtheningWildfires mayYuan T. Lee'sdefault Sign Inemc2Bubbles

  14. On the reliability of microvariability tests in quasars

    SciTech Connect (OSTI)

    De Diego, José A., E-mail: jdo@astro.unam.mx [Instituto de Astronomía, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, C.P. 04510, Distrito Federal, MexicoAND (Mexico); Instituto de Astrofísica de Canarias-Universidad de La Laguna, CEI Canarias: Campus Atlántico Tricontinental, E-38205 La Laguna, Tenerife (Spain)

    2014-11-01T23:59:59.000Z

    Microvariations probe the physics and internal structure of quasars. Unpredictability and small flux variations make this phenomenon elusive and difficult to detect. Variance-based probes such as the C and F tests, or a combination of both, are popular methods to compare the light curves of the quasar and a comparison star. Recently, detection claims in some studies have depended on the agreement of the results of the C and F tests, or of two instances of the F-test, for rejecting the non-variation null hypothesis. However, the C-test is a non-reliable statistical procedure, the F-test is not robust, and the combination of tests with concurrent results is anything but a straightforward methodology. A priori power analysis calculations and post hoc analysis of Monte Carlo simulations show excellent agreement for the analysis of variance test to detect microvariations as well as the limitations of the F-test. Additionally, the combined tests yield correlated probabilities that make the assessment of statistical significance unworkable. However, it is possible to include data from several field stars to enhance the power in a single F-test, increasing the reliability of the statistical analysis. This would be the preferred methodology when several comparison stars are available. An example using two stars and the enhanced F-test is presented. These results show the importance of using adequate methodologies and avoiding inappropriate procedures that can jeopardize microvariability detections. Power analysis and Monte Carlo simulations are useful tools for research planning, as they can demonstrate the robustness and reliability of different research approaches.

  15. Fifty Years of THERP and Human Reliability Analysis

    SciTech Connect (OSTI)

    Ronald L. Boring

    2012-06-01T23:59:59.000Z

    In 1962 at a Human Factors Society symposium, Alan Swain presented a paper introducing a Technique for Human Error Rate Prediction (THERP). This was followed in 1963 by a Sandia Laboratories monograph outlining basic human error quantification using THERP and, in 1964, by a special journal edition of Human Factors on quantification of human performance. Throughout the 1960s, Swain and his colleagues focused on collecting human performance data for the Sandia Human Error Rate Bank (SHERB), primarily in connection with supporting the reliability of nuclear weapons assembly in the US. In 1969, Swain met with Jens Rasmussen of Risø National Laboratory and discussed the applicability of THERP to nuclear power applications. By 1975, in WASH-1400, Swain had articulated the use of THERP for nuclear power applications, and the approach was finalized in the watershed publication of the NUREG/CR-1278 in 1983. THERP is now 50 years old, and remains the most well known and most widely used HRA method. In this paper, the author discusses the history of THERP, based on published reports and personal communication and interviews with Swain. The author also outlines the significance of THERP. The foundations of human reliability analysis are found in THERP: human failure events, task analysis, performance shaping factors, human error probabilities, dependence, event trees, recovery, and pre- and post-initiating events were all introduced in THERP. While THERP is not without its detractors, and it is showing signs of its age in the face of newer technological applications, the longevity of THERP is a testament of its tremendous significance. THERP started the field of human reliability analysis. This paper concludes with a discussion of THERP in the context of newer methods, which can be seen as extensions of or departures from Swain’s pioneering work.

  16. Assessment of microelectronics packaging for high temperature, high reliability applications

    SciTech Connect (OSTI)

    Uribe, F.

    1997-04-01T23:59:59.000Z

    This report details characterization and development activities in electronic packaging for high temperature applications. This project was conducted through a Department of Energy sponsored Cooperative Research and Development Agreement between Sandia National Laboratories and General Motors. Even though the target application of this collaborative effort is an automotive electronic throttle control system which would be located in the engine compartment, results of this work are directly applicable to Sandia`s national security mission. The component count associated with the throttle control dictates the use of high density packaging not offered by conventional surface mount. An enabling packaging technology was selected and thermal models defined which characterized the thermal and mechanical response of the throttle control module. These models were used to optimize thick film multichip module design, characterize the thermal signatures of the electronic components inside the module, and to determine the temperature field and resulting thermal stresses under conditions that may be encountered during the operational life of the throttle control module. Because the need to use unpackaged devices limits the level of testing that can be performed either at the wafer level or as individual dice, an approach to assure a high level of reliability of the unpackaged components was formulated. Component assembly and interconnect technologies were also evaluated and characterized for high temperature applications. Electrical, mechanical and chemical characterizations of enabling die and component attach technologies were performed. Additionally, studies were conducted to assess the performance and reliability of gold and aluminum wire bonding to thick film conductor inks. Kinetic models were developed and validated to estimate wire bond reliability.

  17. Structural reliability of brittle materials - an analytical method

    E-Print Network [OSTI]

    Shields, Charles Burch

    1967-01-01T23:59:59.000Z

    on observed failure stress can be ex?la!ned. Pre~. ". cl (1) ?resents an example of this effect which illustrates the. mar'ked decrease in fai1ure. 'tran- th &7ith increasing test e1cment size z'hich is ob. . c;rved1. Testing of clem ni. . of varying... and Reliability of- Iic. chanlcal Systcr!s, Especially Ai craft Struct:ur es Aeronautical Syst. ems Div. , Al. SC, USA'& IIPAPB, Ohf o& (July 1961). 34 AI'!-";. I" D I X AN EX!DiPLE PPOBI, r:, &I '3'he comipuLcr programs presentecl in this paper do not...

  18. Worldwide reliability surveys of high voltage circuit breakers

    SciTech Connect (OSTI)

    Heising, C.R.

    1995-05-01T23:59:59.000Z

    This article reports on the results of two CIGRE 13.06 Working Group worldwide surveys of the reliability of high voltage circuit breakers, 63 kV and above. The first inquiry included 78,000 breaker-years of ``in service data`` from 102 utilities in 22 countries during the years 1974--1977 and included all interrupting technologies. The second inquiry included 70,708 breaker-years from 132 utilities in 22 countries for the years 1988--1991 and only included single-pressure SF6 breakers, because this is what most utilities are now buying. Thirty-one US utilities submitted data.

  19. Robot-Powered Reliability Testing at NREL's ESIF

    ScienceCinema (OSTI)

    Harrison; Kevin

    2014-06-10T23:59:59.000Z

    With auto manufacturers expected to roll out fuel cell electric vehicles in the 2015 to 2017 timeframe, the need for a reliable hydrogen fueling infrastructure is greater than ever. That's why the National Renewable Energy Laboratory (NREL) is using a robot in its Energy Systems Integration Facility (ESIF) to assess the durability of hydrogen fueling hoses, a largely untested-and currently costly-component of hydrogen fueling stations. The automated machine mimics the repetitive stress of a human bending and twisting the hose to refuel a vehicle-all under the high pressure and low temperature required to deliver hydrogen to a fuel cell vehicle's onboard storage tank.

  20. Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR)

    SciTech Connect (OSTI)

    Gilbert, B.G.; Richards, R.E.; Reece, W.J.; Gertman, D.I.

    1992-10-01T23:59:59.000Z

    This Reference Guide contains instructions on how to install and use Version 3.5 of the NRC-sponsored Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR). The NUCLARR data management system is contained in compressed files on the floppy diskettes that accompany this Reference Guide. NUCLARR is comprised of hardware component failure data (HCFD) and human error probability (HEP) data, both of which are available via a user-friendly, menu driven retrieval system. The data may be saved to a file in a format compatible with IRRAS 3.0 and commercially available statistical packages, or used to formulate log-plots and reports of data retrieval and aggregation findings.

  1. Blade reliability collaborative : collection of defect, damage and repair data.

    SciTech Connect (OSTI)

    Ashwill, Thomas D.; Ogilvie, Alistair B.; Paquette, Joshua A.

    2013-04-01T23:59:59.000Z

    The Blade Reliability Collaborative (BRC) was started by the Wind Energy Technologies Department of Sandia National Laboratories and DOE in 2010 with the goal of gaining insight into planned and unplanned O&M issues associated with wind turbine blades. A significant part of BRC is the Blade Defect, Damage and Repair Survey task, which will gather data from blade manufacturers, service companies, operators and prior studies to determine details about the largest sources of blade unreliability. This report summarizes the initial findings from this work.

  2. Reliability Testing the Die-Attach of CPV Cell Assemblies

    SciTech Connect (OSTI)

    Bosco, N.; Sweet, C.; Kurtz, S.

    2011-02-01T23:59:59.000Z

    Results and progress are reported for a course of work to establish an efficient reliability test for the die-attach of CPV cell assemblies. Test vehicle design consists of a ~1 cm2 multijunction cell attached to a substrate via several processes. A thermal cycling sequence is developed in a test-to-failure protocol. Methods of detecting a failed or failing joint are prerequisite for this work; therefore both in-situ and non-destructive methods, including infrared imaging techniques, are being explored as a method to quickly detect non-ideal or failing bonds.

  3. Shutdown heat removal system reliability in thermal reactors

    SciTech Connect (OSTI)

    Sun, Y.H.; Bari, R.A.

    1980-01-01T23:59:59.000Z

    An analysis of the failure probability per year of the shutdown heat removal system (SHRS) at hot standby conditions for two thermal reactor designs is presented. The selected reactor designs are the Pressurized Water Reactor and the Nonproliferation Alternative System Assessment Program Heavy Water Reactor. Failures of the SHRS following the initiating transients of loss of offsite power and loss of main feedwater system are evaluated. Common mode failures between components are incorporated in this anlaysis via the ..beta..-factor method and the sensitivity of the system reliability to common mode failures is investigated parametrically.

  4. Reliability of Operation at SLAC in the LCLS Era

    SciTech Connect (OSTI)

    Wienands, U.; Allen, W.B.; Colocho, W.; Erickson, R.; Stanek, M.; /SLAC

    2009-06-19T23:59:59.000Z

    LCLS hardware availability has been above 90% for the first two commissioning runs of the accelerator. In this paper we compare the reliability data for LCLS (availability, MTBF and MTTR) to those of PEP-II, the e{sup +}e{sup -} collider operating previously at SLAC. It may be seen that the linac availability is not significantly different now than it was before, while the availability of the whole LCLS facility is significantly higher than that of the PEP-II facility as a whole (which was about 87%). Most of the improvement is in the MTTR. Ways to improve availability towards the goal of 95% are discussed.

  5. Robot-Powered Reliability Testing at NREL's ESIF

    SciTech Connect (OSTI)

    Harrison; Kevin

    2013-12-05T23:59:59.000Z

    With auto manufacturers expected to roll out fuel cell electric vehicles in the 2015 to 2017 timeframe, the need for a reliable hydrogen fueling infrastructure is greater than ever. That's why the National Renewable Energy Laboratory (NREL) is using a robot in its Energy Systems Integration Facility (ESIF) to assess the durability of hydrogen fueling hoses, a largely untested-and currently costly-component of hydrogen fueling stations. The automated machine mimics the repetitive stress of a human bending and twisting the hose to refuel a vehicle-all under the high pressure and low temperature required to deliver hydrogen to a fuel cell vehicle's onboard storage tank.

  6. A Unified Framework for Reliability Assessment of Wind Energy Conversion Systems

    E-Print Network [OSTI]

    Liberzon, Daniel

    1 A Unified Framework for Reliability Assessment of Wind Energy Conversion Systems Sebastian S a framework for assessing wind energy conversion systems (WECS) reliability in the face of external based on wind energy are: the impact of wind speed variability on system reliability [1]; WECS' reaction

  7. RELIABILITY ANALYSIS IN A FAULT TOLERANT CONTROL STRATEGY DEDICATED TO ACTIVE POWER FILTER

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    RELIABILITY ANALYSIS IN A FAULT TOLERANT CONTROL STRATEGY DEDICATED TO ACTIVE POWER FILTER P. WEBER reliability indicate the optimal structure. Keywords: Fault Tolerant Control, System Reliability, Active power control and nuclear power plant operation (Zhang and Jiang, 2003). Various studies on FTC are based

  8. Performance and Reliability of Interface Materials for Automotive Power Electronics (Presentation)

    SciTech Connect (OSTI)

    Narumanchi, S.; DeVoto, D.; Mihalic, M.; Paret, P.

    2013-07-01T23:59:59.000Z

    Thermal management and reliability are important because excessive temperature can degrade the performance, life, and reliability of power electronics and electric motors. Advanced thermal management technologies enable keeping temperature within limits; higher power densities; and lower cost materials, configurations and systems. Thermal interface materials, bonded interface materials and the reliability of bonded interfaces are discussed in this presentation.

  9. Introduction to Model-based Reliability Evaluation of Wireless Sensor Networks

    E-Print Network [OSTI]

    Breu, Ruth

    Introduction to Model-based Reliability Evaluation of Wireless Sensor Networks C. J¨aggle J: A high level of reliability is a significant requirement for using wireless sensor networks in industrial environments. Model-based evaluation is usually applied in conventional systems to estimate the reliability

  10. Cost and Reliability Considerations in Designing the Next-Generation IP over WDM Backbone Networks

    E-Print Network [OSTI]

    Fisher, Kathleen

    and reliability. Reduction of equipment and costs at Layer 3 (router and line cards) should not resultCost and Reliability Considerations in Designing the Next-Generation IP over WDM Backbone Networks networks. To address the reliability challenges due to failures and planned outages, ISPs typically use two

  11. LESSONS FROM ENGINEERING: CAN SOFTWARE BENEFIT FROM PRODUCT BASED EVIDENCE OF RELIABILITY?

    E-Print Network [OSTI]

    Snooke, Neal

    on mature engineering concepts such as reliability, dependability, safety, failure mode analysisLESSONS FROM ENGINEERING: CAN SOFTWARE BENEFIT FROM PRODUCT BASED EVIDENCE OF RELIABILITY? Position, United Kingdom nns@aber.ac.uk Keywords: Software engineering, Model-driven engineering, Reliability

  12. Reliability importance analysis of Markovian systems at steady state using perturbation analysis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -7Jun2012 Author manuscript, published in "Reliability Engineering and System Safety 93 (2008) 1605 contribute the most to system (un)performance (reliability, maintainability, safety, or any other performance upgrade (improved design, better maintenance, ...). To take full advantage of reliability studies

  13. A cost-effective mechanism for Cloud data reliability management based on proactive replica checking

    E-Print Network [OSTI]

    Yang, Yun

    A cost-effective mechanism for Cloud data reliability management based on proactive replica for managing the data reliability would incur huge storage cost. To address this issue, in this paper we present a novel cost-effective data reliability management mechanism named PRCR, which proactively checks

  14. Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems

    E-Print Network [OSTI]

    Newcastle upon Tyne, University of

    Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems. Introduction Model-based evaluation of the reliability of distributed systems has traditionally required expert- proach to analyze the reliability of fault-tolerant distributed systems. More in particular, we want

  15. Session Reliability of Web Systems under Heavy-Tailed Workloads: An Approach Based

    E-Print Network [OSTI]

    Goseva-Popstojanova, Katerina

    Session Reliability of Web Systems under Heavy-Tailed Workloads: An Approach Based on Design reliability modeling which integrates the user view represented by the session layer and the system view indicate that session reliability, which accounts for the distribution of failed requests within sessions

  16. Using Travel Time Reliability Measures to Improve Regional Transportation Planning and URS Corporation

    E-Print Network [OSTI]

    Bertini, Robert L.

    use travel time reliability in the following ways: 1) incorporate it as a system-wide goal; 2 reliability in the historical sense such that a distribution of travel times is examined, and specific, and reliability can make a significant difference in efficient use of the transportation system. Despite its

  17. Rho-form for fibrations

    E-Print Network [OSTI]

    Azzali, Sara

    2007-01-01T23:59:59.000Z

    In this paper we construct the generalization of the Cheeger-Gromov L^2-rho-invariant in the case of families. It is in fact a differential form: given a family of Dirac-type operators along the fibres of a fibration M--> B and a second fibration of normal G-coverings of the fibres, the rho-form is defined as the difference between the eta-form of Bismut and Cheeger and an L^2-eta-form, whose meaning is here given. Some hypothesis on the spectrum of the family of operators on the covering fibres must be made, to construct the L^2-eta-form. The delicate point is in fact in the t--> \\infty-asymptotic of the heat operator for the Bismut superconnection on the covering. First we consider a strong hypothesis (unifom invertibility for the two families of operators): in this case the L^2-eta-form is well defined. This situation occurs for example in the case of a fibration of spin manifolds with vertical metric of positive scalar curvature. Here we also prove that rho-form is constant on the connected components of ...

  18. Process to form mesostructured films

    DOE Patents [OSTI]

    Brinker, C. Jeffrey (Albuquerque, NM); Anderson, Mark T. (Woodbury, MN); Ganguli, Rahul (Camarillo, CA); Lu, Yunfeng (Albuquerque, NM)

    1999-01-01T23:59:59.000Z

    This invention comprises a method to form a family of supported films film with pore size in the approximate range 0.8-20 nm exhibiting highly ordered microstructures and porosity derived from an ordered micellar or liquid-crystalline organic-inorganic precursor structure that forms during film deposition. Optically transparent, 100-500-nm thick films exhibiting a unique range of microstructures and uni-modal pore sizes are formed in seconds in a continuous coating operation. Applications of these films include sensors, membranes, low dielectric constant interlayers, anti-reflective coatings, and optical hosts.

  19. Towards Reliable Cross Sections for National Security Applications

    SciTech Connect (OSTI)

    Escher, J E; Dietrich, F S; Nobre, G A; Thompson, I J

    2011-02-24T23:59:59.000Z

    Stockpile stewardship requires the description of weapons performance without resorting to underground nuclear testing. In the earlier tests, selected isotopes were used as detectors, and recovered after irradiation. Aspects of nuclear device performance were inferred by comparing the measured isotopic ratios to those predicted from simulations. The reaction flows that produce the final isotopic distributions proceed through regions of the nuclear chart that include unstable nuclei. Presently, improved nuclear data input is required to reanalyze prior tests and to certify the stockpile's reliability and safety. Many important cross sections are unknown, as is shown in the example of the Yttrium reaction network (Figure 1). The relevant reactions include (n,2n), (n,n'), (n,gamma), (n,p) and other charged-particle emitting reactions. The cross sections have to be calculated or inferred from indirect measurements. In both cases, reliable optical models that are valid a few nucleons away from stability are needed. The UNEDF Nuclear Reaction activities address this need by combining nuclear-structure input from UNEDF structure calculations with modern reaction theory and large-scale computational capabilities to develop microscopic nucleon-nucleus optical potentials that can be extrapolated to unstable nuclei. In addition, the reaction calculation tools and optical models developed in this context are proving valuable for planning and interpreting indirect (surrogate) measurements of the required cross sections.

  20. Adhesion and Thin-Film Module Reliability: Preprint

    SciTech Connect (OSTI)

    McMahon, T. J.; Jorgensen, G. J.

    2006-05-01T23:59:59.000Z

    Among the infrequently measured but essential properties for thin-film (T-F) module reliability are the interlayer adhesion and cohesion within a layer. These can be cell contact layers to glass, contact layers to the semiconductor, encapsulant to cell, glass, or backsheet, etc. We use an Instron mechanical testing unit to measure peel strengths at 90{sup o} or 180{sup o} and, in some cases, a scratch and tape pull test to evaluate inter-cell layer adhesion strengths. We present peel strength data for test specimens laminated from the three T-F technologies, before and after damp heat, and in one instance at elevated temperatures. On laminated T-F cell samples, failure can occur uniformly at any one of the many interfaces, or non-uniformly across the peel area at more than one interface. Some peel strengths are << 1 N/mm. This is far below the normal Instron mechanical testing unit Instron mechanical testing unit; glass interface values of >10 N/mm. We measure a wide range of adhesion strengths and suggest that adhesion measured under higher temperature and relative humidity conditions is more relevant for module reliability.

  1. Residential California adobe : mud form

    E-Print Network [OSTI]

    Daymond, Diana Leigh

    1985-01-01T23:59:59.000Z

    Northern California has a rich tradition of adobe architecture . Formed with earth, defined by site, climate and use, the adobe structures exemplify a building methodology in harmony with nature and the lifestyle of it's ...

  2. Introduction to differential forms II

    E-Print Network [OSTI]

    1998-04-13T23:59:59.000Z

    left hand integral is precisely the induced voltage and the right side is related to the strength of the ... The electromagnetic field can be represented by a 2-form.

  3. FORMS AND INSTRUCTIONS FOR SUBMITTING

    E-Print Network [OSTI]

    CALIFORNIA ENERGY COMMISSION FORMS AND INSTRUCTIONS FOR SUBMITTING RETAIL ELECTRICITY PRICE DATA Schwarzenegger, Governor #12;2 CALIFORNIA ENERGY COMMISSION Mignon Marks Principal Author Ruben Tavares Project Manager David Ashuckian Manager ELECTRICITY ANALYSIS OFFICE Scott W. Matthews Deputy Director ELECTRICITY

  4. APPLICATION FORM For participating in

    E-Print Network [OSTI]

    Subramanian, Venkat

    APPLICATION FORM For participating in International Experience in Energy, Environmental EECE 401, 3 credits The Department of Energy, Environmental and Chemical Engineering is pleased lectures, technical projects and other visits. In 2012, the class will be visiting UNICAMP, Brazil

  5. Final report for CCS cross-layer reliability visioning study

    SciTech Connect (OSTI)

    Quinn, Heather M [Los Alamos National Laboratory; Dehon, Andre [U. PENN; Carter, Nicj [INTEL

    2010-12-20T23:59:59.000Z

    The geometric rate of improvement of transistor size and integrated circuit performance known as Moore's Law has been an engine of growth for our economy, enabling new products and services, creating new value and wealth, increasing safety, and removing menial tasks from our daily lives. Affordable, highly integrated components have enabled both life-saving technologies and rich entertainment applications. Anti-lock brakes, insulin monitors, and GPS-enabled emergency response systems save lives. Cell phones, internet appliances, virtual worlds, realistic video games, and mp3 players enrich our lives and connect us together. Over the past 40 years of silicon scaling, the increasing capabilities of inexpensive computation have transformed our society through automation and ubiquitous communications. Looking forward, increasing unpredictability threatens our ability to continue scaling integrated circuits at Moore's Law rates. As the transistors and wires that make up integrated circuits become smaller, they display both greater differences in behavior among devices designed to be identical and greater vulnerability to transient and permanent faults. Conventional design techniques expend energy to tolerate this unpredictability by adding safety margins to a circuit's operating voltage, clock frequency or charge stored per bit. However, the rising energy costs needed to compensate for increasing unpredictability are rapidly becoming unacceptable in today's environment where power consumption is often the limiting factor on integrated circuit performance and energy efficiency is a national concern. Reliability and energy consumption are both reaching key inflection points that, together, threaten to reduce or end the benefits of feature size reduction. To continue beneficial scaling, we must use a cross-layer, Jull-system-design approach to reliability. Unlike current systems, which charge every device a substantial energy tax in order to guarantee correct operation in spite of rare events, such as one high-threshold transistor in a billion or one erroneous gate evaluation in an hour of computation, cross-layer reliability schemes make reliability management a cooperative effort across the system stack, sharing information across layers so that they only expend energy on reliability when an error actually occurs. Figure 1 illustrates an example of such a system that uses a combination of information from the application and cheap architecture-level techniques to detect errors. When an error occurs, mechanisms at higher levels in the stack correct the error, efficiently delivering correct operation to the user in spite of errors at the device or circuit levels. In the realms of memory and communication, engineers have a long history of success in tolerating unpredictable effects such as fabrication variability, transient upsets, and lifetime wear using information sharing, limited redundancy, and cross-layer approaches that anticipate, accommodate, and suppress errors. Networks use a combination of hardware and software to guarantee end-toend correctness. Error-detection and correction codes use additional information to correct the most common errors, single-bit transmission errors. When errors occur that cannot be corrected by these codes, the network protocol requests re-transmission of one or more packets until the correct data is received. Similarly, computer memory systems exploit a cross-layer division of labor to achieve high performance with modest hardware. Rather than demanding that hardware alone provide the virtual memory abstraction, software page-fault and TLB-miss handlers allow a modest piece of hardware, the TLB, to handle the common-case operations on a cyc1e-by-cycle basis while infrequent misses are handled in system software. Unfortunately, mitigating logic errors is not as simple or as well researched as memory or communication systems. This lack of understanding has led to very expensive solutions. For example, triple-modular redundancy masks errors by triplicating computations in either time or area. T

  6. Method for forming metal contacts

    DOE Patents [OSTI]

    Reddington, Erik; Sutter, Thomas C; Bu, Lujia; Cannon, Alexandra; Habas, Susan E; Curtis, Calvin J; Miedaner, Alexander; Ginley, David S; Van Hest, Marinus Franciscus Antonius Maria

    2013-09-17T23:59:59.000Z

    Methods of forming metal contacts with metal inks in the manufacture of photovoltaic devices are disclosed. The metal inks are selectively deposited on semiconductor coatings by inkjet and aerosol apparatus. The composite is heated to selective temperatures where the metal inks burn through the coating to form an electrical contact with the semiconductor. Metal layers are then deposited on the electrical contacts by light induced or light assisted plating.

  7. Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model

    SciTech Connect (OSTI)

    Chassin, David P.; Posse, Christian

    2005-09-15T23:59:59.000Z

    The reliability of electric transmission systems is examined using a scale-free model of network topology and failure propagation. The topologies of the North American eastern and western electric grids are analyzed to estimate their reliability based on the Barabási-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using other methods and they suggest that scale-free network models are usable to estimate aggregate electric grid reliability.

  8. Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model

    SciTech Connect (OSTI)

    Chassin, David P.; Posse, Christian

    2005-09-15T23:59:59.000Z

    The reliability of electric transmission systems is examined using a scale-free model of network topology and failure propagation. The topologies of the North American eastern and western electric grids are analyzed to estimate their reliability based on the Barabasi-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using standard power engineering methods, and they suggest that scale-free network models are usable to estimate aggregate electric grid reliability.

  9. Reliability of IGBT in a STATCOM for Harmonic Compensation and Power Factor Correction

    SciTech Connect (OSTI)

    Gopi Reddy, Lakshmi Reddy [ORNL; Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL; Xu, Yan [ORNL; Rizy, D Tom [ORNL

    2012-01-01T23:59:59.000Z

    With smart grid integration, there is a need to characterize reliability of a power system by including reliability of power semiconductors in grid related applications. In this paper, the reliability of IGBTs in a STATCOM application is presented for two different applications, power factor correction and harmonic elimination. The STATCOM model is developed in EMTP, and analytical equations for average conduction losses in an IGBT and a diode are derived and compared with experimental data. A commonly used reliability model is used to predict reliability of IGBT.

  10. Sources: Energy Information Administration, Form EIA-182,

    U.S. Energy Information Administration (EIA) Indexed Site

    Sources: Energy Information Administration, Form EIA-182, "Domestic Crude Oil First Purchase Report"; Form EIA-856, "Monthly Foreign Crude Oil Acquisition Report"; and Form EIA-14,...

  11. Better Buildings Residential Network Membership Form | Department...

    Energy Savers [EERE]

    Membership Form Better Buildings Residential Network Membership Form Membership form from the U.S. Department of Energy's Better Buildings Residential Network Recommended...

  12. Perturbation Theory From Automorphic Forms

    E-Print Network [OSTI]

    Neil Lambert; Peter West

    2010-05-12T23:59:59.000Z

    Using our previous construction of Eisenstein-like automorphic forms we derive formulae for the perturbative and non-perturbative parts for any group and representation. The result is written in terms of the weights of the representation and the derivation is largely group theoretical. Specialising to the E_{n+1} groups relevant to type II string theory and the representation associated with node n+1 of the E_{n+1} Dynkin diagram we explicitly find the perturbative part in terms of String Theory variables, such as the string coupling g_d and volume V_n. For dimensions seven and higher we find that the perturbation theory involves only two terms. In six dimensions we construct the SO(5,5) automorphic form using the vector representation. Although these automorphic forms are generally compatible with String Theory, the one relevant to R^4 involves terms with g_d^{-6} and so is problematic. We then study a constrained SO(5,5) automorphic form, obtained by summing over null vectors, and compute its perturbative part. We find that it is consistent with String Theory and makes precise predictions for the perturbative results. We also study the unconstrained automorphic forms for E_6 in the 27 representation and E_7 in the 133 representation, giving their perturbative part and commenting on their role in String Theory.

  13. USING SEQUENCING TO IMPROVE OPERATIONAL EFFICIENCY AND RELIABILITY

    SciTech Connect (OSTI)

    D OTTAVIO,T.; NIEDZIELA, J.

    2007-10-15T23:59:59.000Z

    Operation of an accelerator requires the efficient and reproducible execution of many different types of procedures. Some procedures, like beam acceleration, magnet quench recovery, and species switching can be quite complex. To improve accelerator reliability and efficiency, automated execution of procedures is required. Creation of a single robust sequencing application permits the streamlining of this process and offers many benefits in sequence creation, editing, and control. In this paper, we present key features of a sequencer application commissioned at the Collider-Accelerator Department of Brookhaven National Laboratory during the 2007 run. Included is a categorization of the different types of sequences in use, a discussion of the features considered desirable in a good sequencer, and a description of the tools created to aid in sequence construction and diagnosis. Finally, highlights from our operational experience are presented, with emphasis on Operations control of the sequencer, and the alignment of sequence construction with existing operational paradigms.

  14. Current Human Reliability Analysis Methods Applied to Computerized Procedures

    SciTech Connect (OSTI)

    Ronald L. Boring

    2012-06-01T23:59:59.000Z

    Computerized procedures (CPs) are an emerging technology within nuclear power plant control rooms. While CPs have been implemented internationally in advanced control rooms, to date no US nuclear power plant has implemented CPs in its main control room (Fink et al., 2009). Yet, CPs are a reality of new plant builds and are an area of considerable interest to existing plants, which see advantages in terms of enhanced ease of use and easier records management by omitting the need for updating hardcopy procedures. The overall intent of this paper is to provide a characterization of human reliability analysis (HRA) issues for computerized procedures. It is beyond the scope of this document to propose a new HRA approach or to recommend specific methods or refinements to those methods. Rather, this paper serves as a review of current HRA as it may be used for the analysis and review of computerized procedures.

  15. High pressure, high current, low inductance, high reliability sealed terminals

    DOE Patents [OSTI]

    Hsu, John S. (Oak Ridge, TN) [Oak Ridge, TN; McKeever, John W. (Oak Ridge, TN) [Oak Ridge, TN

    2010-03-23T23:59:59.000Z

    The invention is a terminal assembly having a casing with at least one delivery tapered-cone conductor and at least one return tapered-cone conductor routed there-through. The delivery and return tapered-cone conductors are electrically isolated from each other and positioned in the annuluses of ordered concentric cones at an off-normal angle. The tapered cone conductor service can be AC phase conductors and DC link conductors. The center core has at least one service conduit of gate signal leads, diagnostic signal wires, and refrigerant tubing routed there-through. A seal material is in direct contact with the casing inner surface, the tapered-cone conductors, and the service conduits thereby hermetically filling the interstitial space in the casing interior core and center core. The assembly provides simultaneous high-current, high-pressure, low-inductance, and high-reliability service.

  16. IDHEAS – A NEW APPROACH FOR HUMAN RELIABILITY ANALYSIS

    SciTech Connect (OSTI)

    G. W. Parry; J.A Forester; V.N. Dang; S. M. L. Hendrickson; M. Presley; E. Lois; J. Xing

    2013-09-01T23:59:59.000Z

    This paper describes a method, IDHEAS (Integrated Decision-Tree Human Event Analysis System) that has been developed jointly by the US NRC and EPRI as an improved approach to Human Reliability Analysis (HRA) that is based on an understanding of the cognitive mechanisms and performance influencing factors (PIFs) that affect operator responses. The paper describes the various elements of the method, namely the performance of a detailed cognitive task analysis that is documented in a crew response tree (CRT), and the development of the associated time-line to identify the critical tasks, i.e. those whose failure results in a human failure event (HFE), and an approach to quantification that is based on explanations of why the HFE might occur.

  17. Module Packaging Research and Reliability: Activities and Capabilities

    SciTech Connect (OSTI)

    McMahon, T. J.; delCueto, J.; Glick, S.; Jorgensen, G.; Kempe, M.; Pern, J.; Terwilliger, K.

    2005-11-01T23:59:59.000Z

    Our team activities are directed at improving PV module reliability by incorporating new, more effective, and less expensive packaging materials and techniques. New and existing materials or designs are evaluated before and during accelerated environmental exposure for the following properties: (1) Adhesion and cohesion: peel strength and lap shear. (2) Electrical conductivity: surface, bulk, interface and transients. (3) Water vapor transmission: solubility and diffusivity. (4) Accelerated weathering: ultraviolet, temperature, and damp heat tests. (5) Module and cell failure diagnostics: infrared imaging, individual cell shunt characterization, coring. (6) Fabrication improvements: SiOxNy barrier coatings and enhanced wet adhesion. (7) Numerical modeling: Moisture ingress/egress, module and cell performance, and cell-to-frame leakage current. (8) Rheological properties of polymer encapsulant and sheeting materials. Specific examples are described.

  18. Puget Sound Area Electric Reliability Plan : Final Environmental Impact Statement.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    1992-04-01T23:59:59.000Z

    A specific need exists in the Puget Sound area for balance between east-west transmission capacity and the increasing demand to import power generated east of the Cascades. At certain times of the year, and during certain conditions, there is more demand for power in the Puget Sound area than the transmission system and existing generation can reliably supply. This high demand, called peak demand occurs during the winter months when unusually cold weather increases electricity use for heating. The existing power system can supply enough power if no emergencies occur. However, during emergencies the system will not operate properly. As demand grows, the system becomes more strained. To meet demand, the rate of growth of demand must be reduced or the ability to serve the demand must be increased, or both.

  19. Reliability of Current Biokinetic and Dosimetric Models for Radionuclides: A Pilot Study

    SciTech Connect (OSTI)

    Leggett, Richard Wayne [ORNL; Eckerman, Keith F [ORNL; Meck, Robert A. [U.S. Nuclear Regulatory Commission

    2008-10-01T23:59:59.000Z

    This report describes the results of a pilot study of the reliability of the biokinetic and dosimetric models currently used by the U.S. Nuclear Regulatory Commission (NRC) as predictors of dose per unit internal or external exposure to radionuclides. The study examines the feasibility of critically evaluating the accuracy of these models for a comprehensive set of radionuclides of concern to the NRC. Each critical evaluation would include: identification of discrepancies between the models and current databases; characterization of uncertainties in model predictions of dose per unit intake or unit external exposure; characterization of variability in dose per unit intake or unit external exposure; and evaluation of prospects for development of more accurate models. Uncertainty refers here to the level of knowledge of a central value for a population, and variability refers to quantitative differences between different members of a population. This pilot study provides a critical assessment of models for selected radionuclides representing different levels of knowledge of dose per unit exposure. The main conclusions of this study are as follows: (1) To optimize the use of available NRC resources, the full study should focus on radionuclides most frequently encountered in the workplace or environment. A list of 50 radionuclides is proposed. (2) The reliability of a dose coefficient for inhalation or ingestion of a radionuclide (i.e., an estimate of dose per unit intake) may depend strongly on the specific application. Multiple characterizations of the uncertainty in a dose coefficient for inhalation or ingestion of a radionuclide may be needed for different forms of the radionuclide and different levels of information of that form available to the dose analyst. (3) A meaningful characterization of variability in dose per unit intake of a radionuclide requires detailed information on the biokinetics of the radionuclide and hence is not feasible for many infrequently studied radionuclides. (4) The biokinetics of a radionuclide in the human body typically represents the greatest source of uncertainty or variability in dose per unit intake. (5) Characterization of uncertainty in dose per unit exposure is generally a more straightforward problem for external exposure than for intake of a radionuclide. (6) For many radionuclides the most important outcome of a large-scale critical evaluation of databases and biokinetic models for radionuclides is expected to be the improvement of current models. Many of the current models do not fully or accurately reflect available radiobiological or physiological information, either because the models are outdated or because they were based on selective or uncritical use of data or inadequate model structures. In such cases the models should be replaced with physiologically realistic models that incorporate a wider spectrum of information.

  20. Group Study Room Policy and Reservation Form

    E-Print Network [OSTI]

    Reynolds, Albert C.

    to the Group Study Reservation Form. Fill out the web form and click "Send" to submit the request. A confirming