National Library of Energy BETA

Sample records for area reliability coordinaiton

  1. 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

  2. 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

  3. Composite System based Multi-Area Reliability Evaluation 

    E-Print Network [OSTI]

    Nagarajan, Ramya

    2011-02-22

    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...

  4. Puget Sound area electric reliability plan. Draft environmental impact statement

    SciTech Connect (OSTI)

    Not Available

    1991-09-01

    The Puget Sound Area Electric Reliability Plan Draft Environmental Impact Statement (DEIS) identifies the alternatives for solving a power system problem in the Puget Sound area. This Plan is undertaken by Bonneville Power Administration (BPA), Puget Sound Power & Light, Seattle City Light, Snohomish Public Utility District No. 1 (PUD), and Tacoma Public Utilities. The Plan consists of potential actions in Puget Sound and other areas in the State of Washington. 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, there is more demand for power than the electric system can supply in the Puget Sound area. 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. The plan to balance Puget Sound`s power demand and supply has these purposes: The plan should define a set of actions that would accommodate ten years of load growth (1994--2003). Federal and State environmental quality requirements should be met. The plan should be consistent with the plans of the Northwest Power Planning Council. The plan should serve as a consensus guideline for coordinated utility action. The plan should be flexible to accommodate uncertainties and differing utility needs. The plan should balance environmental impacts and economic costs. The plan should provide electric system reliability consistent with customer expectations. 29 figs., 24 tabs.

  5. Puget Sound Area Electric Reliability Plan : Draft Environmental Impact State.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    1991-09-01

    The Puget Sound Area Electric Reliability Plan Draft Environmental Impact Statement (DEIS) identifies the alternatives for solving a power system problem in the Puget Sound area. This Plan is undertaken by Bonneville Power Administration (BPA), Puget Sound Power Light, Seattle City Light, Snohomish Public Utility District No. 1 (PUD), and Tacoma Public Utilities. The Plan consists of potential actions in Puget Sound and other areas in the State of Washington. 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, there is more demand for power than the electric system can supply in the Puget Sound area. 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. The plan to balance Puget Sound's power demand and supply has these purposes: The plan should define a set of actions that would accommodate ten years of load growth (1994--2003). Federal and State environmental quality requirements should be met. The plan should be consistent with the plans of the Northwest Power Planning Council. The plan should serve as a consensus guideline for coordinated utility action. The plan should be flexible to accommodate uncertainties and differing utility needs. The plan should balance environmental impacts and economic costs. The plan should provide electric system reliability consistent with customer expectations. 29 figs., 24 tabs.

  6. Puget Sound Area Electric Reliability Plan : Final Environmental Impact Statement.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    1992-04-01

    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.

  7. Interval Methods in Remote Sensing: Reliable SubDivision of Geological Areas

    E-Print Network [OSTI]

    Ward, Karen

    Interval Methods in Remote Sensing: Reliable Sub­Division of Geological Areas David D. Coblentz, G. The subdivision of a geological zone into segments is often a controversial issue, with different evidence of the geological subdivision is the fact that the existing subdivision is often based on the chemical and physical

  8. Puget Sound Area Electric Reliability Plan. Appendix B : Local Generation Evaluation : Draft Environmental Impact Statement.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    1991-09-01

    The information and data contained in this Appendix was extracted from numerous sources. The principle sources used for technical data were Bonneville Power Administration's 1990 Resource Program along with its technical appendix, and Chapter 8 of the Draft 1991 Northwest Conservation and Electric Power Plan. All cost data is reported 1988 dollars unless otherwise noted. This information was supplemented by other data developed by Puget Sound utilities who participated on the Local Generation Team. Identifying generating resources available to the Puget Sound area involved a five step process: (1) listing all possible resources that might contribute power to the Puget Sound area, (2) characterizing the technology/resource status, cost and operating characteristics of these resources, (3) identifying exclusion criteria based on the needs of the overall Puget Sound Electric Reliability Plan study, (4) applying these criteria to the list of resources, and (5) summarizing of the costs and characteristics of the final list of resources. 15 refs., 20 tabs.

  9. Puget Sound Area Electric Reliability Plan : Appendix E, Transmission Reinforcement Analysis.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    1992-04-01

    The purpose of this appendix to the draft environmental impact statement (EIS) report is to provide an update of the latest study work done on transmission system options for the Puget Sound Area Electric Reliability Plan. Also included in the attachments to the EIS are 2 reports analyzing the voltage stability of the Puget Sound transmission system and a review by Power Technologies, Inc. of the BPA voltage stability analysis and reactive options. Five transmission line options and several reactive options are presently being considered as possible solutions to the PSAFRP by the Transmission Team. The first two line options would be built on new rights-of way adjacent (as much as possible) to existing corridors. The reactive options would optimize the existing transmission system capability by adding new stations for series capacitors and/or switchgear. The other three line options are rebuilds or upgrades of existing cross mountain transmission lines. These options are listed below and include a preliminary assessment of the additional transmission system reinforcement required to integrate the new facilities into the existing transmission system. Plans were designed to provide at least 500 MVAR reactive margin.

  10. Puget Sound Area Electric Reliability Plan. Appendix E: Transmission Reinforcement Analysis : Draft Environmental Impact Statement.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    1991-09-01

    Five transmission line options and several reactive (voltage support) options are presently being considered as possible solutions to the PSAERP by the Transmission Team. The first two line options would be built on new rights-of way adjacent (as much as possible) to existing corridors. The reactive options would optimize the existing transmission system capability by adding new stations for series capacitors and/or switchgear. The other three line options are rebuilds or upgrades of existing cross mountain transmission lines. These options are listed below and include a preliminary assessment of the additional transmission system reinforcement required to integrate the new facilities into the existing transmission system. These options were derived from earlier study work that was summarized in Puget Sound Reinforcement Transmission Options'' and New Cross Mountain Transmission Line Alternative: The Crosstie'', which are attached. The initial Transmission Options study report recognized the value to system performance of adding an entirely new circuit rather than rebuilding an existing one. However, siting realities require that rebuild options be considered. Typically, the most attractive rebuild options would be the lowest capacity (lowest voltage) circuits. But because of corridor location, length and terminal proximity, the rebuild options listed below appear to be the most promising. Schematic diagrams and QV Curves of each option are also attached. It should be noted that Snoqualmie and Echo Lake refer to the same station east of Puget Sound and Naneum and Kittitas refer to the same station in the Ellensburg area. 100 figs., 20 tabs.

  11. Transmission Reliability Program 2015 Reliability & Markets Peer...

    Office of Environmental Management (EM)

    Transmission Reliability Program 2015 Reliability & Markets Peer Review Materials Available Transmission Reliability Program 2015 Reliability & Markets Peer Review Materials...

  12. Hawaii electric system reliability.

    SciTech Connect (OSTI)

    Silva Monroy, Cesar Augusto; Loose, Verne William

    2012-09-01

    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.

  13. Electricity Reliability

    E-Print Network [OSTI]

    Post, Wilfred M.

    Electricity Delivery and Energy Reliability High Temperature Superconductivity (HTS) Visualization in the future because they have virtually no resistance to electric current, offering the possibility of new electric power equipment with more energy efficiency and higher capacity than today's systems

  14. Washington DC Reliability Requirements and the Need to Operate...

    Energy Savers [EERE]

    DC Reliability Requirements and the Need to Operate Mirant's Potomac River Generation Station to Support Local Area Reliability (Oak Ridge National Laboratory 2005)...

  15. Reliable Distributed Computing for Decision Support Systems

    E-Print Network [OSTI]

    Bargiela, Andrzej

    of pipes and network nodes spread over a large geographical area, calls for a control of computational system it is serv- icing. Addressing the reliability issues of dis- tributed systems involves tackling

  16. Human Reliability Program Overview

    SciTech Connect (OSTI)

    Bodin, Michael

    2012-09-25

    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.

  17. Reliability Assessment The Reliability of the

    E-Print Network [OSTI]

    ...................................................................................................................4 SUMMER 2006 HEAT WAVE .......................6 CONSTRUCTION OF NEW TRANSMISSION IS STILL SLOW -- CONTINUES TO FACE OBSTACLES..............................................11 RELIABILITY WILL DEPEND ON CLOSE COORDINATION OF GENERATION AND TRANSMISSION PLANNING

  18. Sandia Energy - Human Reliability Assessment

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

    Human Reliability Assessment Home Stationary Power Nuclear Fuel Cycle Nuclear Energy Safety Technologies Risk and Safety Assessment Human Reliability Assessment Human Reliability...

  19. Medical Aspects of Reliability

    SciTech Connect (OSTI)

    Atencio, Julian J.

    2014-05-05

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

  20. Reliable Energy Integration of

    E-Print Network [OSTI]

    Zeng, Ning

    Engineering SustainabilityWorkshop #12;Cost of EnergyTrends Engineering SustainabilityWorkshop #12;Why GoReliable Energy Integration of Offshore Wind Aris Christou University of Maryland College Park MD Access is Difficult, and Costly: Require Minimum Maintenance and High Reliability Engineering

  1. 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,...

  2. Solid State Lighting Reliability

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

    Solid State Lighting Reliability 2015Building Technologies Office Peer Review Lynn Davis, PhD RTI International ldavis@rti.org --- 919-316-3325 Project Summary Timeline: Start...

  3. Gearbox Reliability Collaborative Update (Presentation)

    SciTech Connect (OSTI)

    Sheng, S.

    2013-10-01

    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.

  4. Photovoltaic module reliability workshop

    SciTech Connect (OSTI)

    Mrig, L. (ed.)

    1990-01-01

    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.

  5. 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

  6. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAbout UsRegional companiesReliabilityReliable solar:

  7. Reliability of Electrical Interconnects (Presentation)

    SciTech Connect (OSTI)

    Devoto, D.

    2014-06-01

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

  8. Human Reliability Program Workshop

    SciTech Connect (OSTI)

    Landers, John; Rogers, Erin; Gerke, Gretchen

    2014-05-18

    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.

  9. Solid State Lighting Reliability

    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 Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4EnergySolid State Lighting Reliability 2014 Building

  10. Some optimization problems in power system reliability analysis 

    E-Print Network [OSTI]

    Jirutitijaroen, Panida

    2009-05-15

    This dissertation aims to address two optimization problems involving power system reliabilty analysis, namely multi-area power system adequacy planning and transformer maintenance optimization. A new simulation method for power system reliability...

  11. A Monte Carlo tool for multi-node reliability evaluation 

    E-Print Network [OSTI]

    Thalasila, Chander Pravin

    1993-01-01

    -Area Reliability Program(NARP) is based on the random sampling of generator and transmission line status for each hour. Monte Carlo Approach for Estimating Contingency Statistics along with the Evaluation Subroutine(MACS-ES) advances the generation...

  12. Sandia Energy - PV Systems Reliability

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

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

  13. Measurement Practices for Reliability and Power Quality

    SciTech Connect (OSTI)

    Kueck, JD

    2005-05-06

    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

  14. Testing for PV Reliability (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Bansal, S.

    2014-09-01

    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.

  15. Analysis and design of reliable nanometer circuits

    E-Print Network [OSTI]

    Zhao, Chong

    2007-01-01

    OF CALIFORNIA, SAN DIEGO Analysis and Design of ReliableTHE DISSERTATION Analysis and Design of Reliable Nanometerthe difficulty in analysis and design of reliable digital

  16. Sandia Energy - Inverter Reliability Program

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

    lifetime cost must decrease for photovoltaics to be financially viable. Currently the cost and reliability of PV modules is improving faster than the rest of the system. One...

  17. LMS Reliability FMECA and SPFS

    E-Print Network [OSTI]

    Rathbun, Julie A.

    LMS Reliability FMECA and SPFS Contract No. NAS 9-5829 NO. ATM 97C PAGE 1 REV. MO. B OF~- DATE 21 will use the fixed mode ionization voltage. Prepared by: Approved by: .... ~~~lfo*R. Hiebert LMS III v VI LMS Reliability FMECA and SPFS Contract No. NAS9-5829 TABLE CJF CONTENTS DISCUSSION

  18. Sandia Energy - PV Systems Reliability

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

    studies such as Accelerated Life Testing (ALT) and Failure Modes and Effects Analysis (FMEA). SNL has also partnered with a utility to create a data-driven Reliability Block...

  19. Reliability and Competitive Electricity Markets

    E-Print Network [OSTI]

    Joskow, Paul; Tirole, Jean

    2006-03-14

    Deregulation of the electricity sector has resulted in conflict between the economic aims of creating competitive wholesale and retail markets, and an engineering focus on reliability of supply. The paper starts by deriving the optimal prices...

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

    Energy Savers [EERE]

    Report More Documents & Publications North American Electric Reliability Council Power Outage Update North American Electric Reliability Council Outage Announcement Electric System...

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

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

    Reliability, Executive Summary Report, January 2004 Distributed Generation Operational Reliability, Executive Summary Report, January 2004 This report summarizes the results of the...

  2. 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...

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

    Office of Environmental Management (EM)

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

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

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

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

  5. NREL Publishes Gearbox Reliability Collaborative Findings Report...

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

    Publishes Gearbox Reliability Collaborative Findings Report NREL Publishes Gearbox Reliability Collaborative Findings Report October 3, 2011 - 12:56pm Addthis This is an excerpt...

  6. LMS RELIABILITY PART APPLICATION ANALYSIS

    E-Print Network [OSTI]

    Rathbun, Julie A.

    ( LMS RELIABILITY PART APPLICATION ANALYSIS Contract No. NAS 9-5829 MO. ATM-966 PAGE 1 RIV. NO, B 3. 0 3. I 3. 2 3.3 3. 3. I 3. 3. 2 3.3.3 3. 3. 4 4. 0 PARA. NO. 1. 0 1.1 LMS RELIABILITY PART 1. 5 1. 6 1. 7 2. 0 2. 1 2. 2 2. 2. 1 2. 2. 2 2. 2. 3 2. 2. 4 -:-?· 2. ,5 2. 3 2. 3. 1 LMS

  7. Reliability in the design phase

    SciTech Connect (OSTI)

    Siahpush, A.S.; Hills, S.W.; Pham, H. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Majumdar, D. (USDOE Idaho Field Office, Idaho Falls, ID (United States))

    1991-12-01

    A study was performed to determine the common methods and tools that are available to calculated or predict a system's reliability. A literature review and software survey are included. The desired product of this developmental work is a tool for the system designer to use in the early design phase so that the final design will achieve the desired system reliability without lengthy testing and rework. Three computer programs were written which provide the first attempt at fulfilling this need. The programs are described and a case study is presented for each one. This is a continuing effort which will be furthered in FY-1992. 10 refs.

  8. Reliability in the design phase

    SciTech Connect (OSTI)

    Siahpush, A.S.; Hills, S.W.; Pham, H. [EG and G Idaho, Inc., Idaho Falls, ID (United States); Majumdar, D. [USDOE Idaho Field Office, Idaho Falls, ID (United States)

    1991-12-01

    A study was performed to determine the common methods and tools that are available to calculated or predict a system`s reliability. A literature review and software survey are included. The desired product of this developmental work is a tool for the system designer to use in the early design phase so that the final design will achieve the desired system reliability without lengthy testing and rework. Three computer programs were written which provide the first attempt at fulfilling this need. The programs are described and a case study is presented for each one. This is a continuing effort which will be furthered in FY-1992. 10 refs.

  9. Wind turbine reliability database update.

    SciTech Connect (OSTI)

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

    2009-03-01

    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.

  10. Photovoltaic performance and reliability workshop

    SciTech Connect (OSTI)

    Kroposki, B.

    1996-10-01

    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.

  11. Assessing Reliability in Energy Supply Systems

    E-Print Network [OSTI]

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

    2008-01-01

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

  12. Assessing reliability in energy supply systems

    E-Print Network [OSTI]

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

    2007-01-01

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

  13. 2012 Reliability & Markets Peer Review | Department of Energy

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

    Reliability & Markets Peer Review 2012 Reliability & Markets Peer Review The Transmission Reliability R&D Reliability & Markets Peer Review included 11 presentations over 2 days on...

  14. Program Areas

    Broader source: Energy.gov [DOE]

    Geothermal energy—a relatively untapped domestic energy resource from the heat of the earth—represents a reliable and nearly inexhaustible energy source, with greatly reduced greenhouse gas...

  15. FORMAL SEMANTICS AND VERIFICATION OF DYNAMIC RELIABILITY BLOCK DIAGRAMS FOR SYSTEM RELIABILITY MODELING

    E-Print Network [OSTI]

    Xu, Haiping

    that DRBD provides a powerful tool for system reliability modeling, and our proposed verification approachFORMAL SEMANTICS AND VERIFICATION OF DYNAMIC RELIABILITY BLOCK DIAGRAMS FOR SYSTEM RELIABILITY-scale computer-based systems. KEY WORDS Reliability modeling, dynamic reliability block diagrams (DRBD), Object

  16. 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

  17. Electric Power Reliability in Chemical Plants 

    E-Print Network [OSTI]

    Cross, M. B.

    1989-01-01

    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. Sandia Energy - PV Reliability & Performance Model

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

    Model PV Reliability & Performance ModelTara Camacho-Lopez2015-06-01T20:13:00+00:00 This Web Demo model is a simplified "player" version of the Photovoltaic Reliability Performance...

  19. SELECTING TRAVEL RELIABILITY MEASURES David Schrank

    E-Print Network [OSTI]

    SELECTING TRAVEL RELIABILITY MEASURES by Tim Lomax David Schrank Shawn Turner Texas Transportation Administration provided technical resource staff persons who identified the need for a reliability measure, California Department of Transportation Tim Baker, Colorado Department of Transportation Gordon Morgan

  20. 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)

    1995-06-01

    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.

  1. Sandia Energy - PV Systems Reliability

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II)Geothermal Energy &WaterNew CREWOnline AbstractsSystems Reliability

  2. 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

  3. Reliability Challenges for Solar Energy (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2009-12-08

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

  4. 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

  5. Review of Quantitative Software Reliability Methods

    SciTech Connect (OSTI)

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

    2010-09-17

    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.

  6. College of Electricity Delivery and Energy Reliability | Department...

    Energy Savers [EERE]

    Electricity Delivery and Energy Reliability College of Electricity Delivery and Energy Reliability College of Electricity Delivery and Energy Reliability Vision OE recognizes that...

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

    E-Print Network [OSTI]

    Marnay, Chris

    2007-01-01

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

  8. MEMS reliability in shock environments

    SciTech Connect (OSTI)

    TANNER,DANELLE M.; WALRAVEN,JEREMY A.; HELGESEN,KAREN SUE; IRWIN,LLOYD W.; BROWN,FREDERICK A.; SMITH,NORMAN F.; MASTERS,NATHAN

    2000-02-09

    In order to determine the susceptibility of the MEMS (MicroElectroMechanical Systems) devices to shock, tests were performed using haversine shock pulses with widths of 1 to 0.2 ms in the range from 500g to 40,000g. The authors chose a surface-micromachined microengine because it has all the components needed for evaluation: springs that flex, gears that are anchored, and clamps and spring stops to maintain alignment. The microengines, which were unpowered for the tests, performed quite well at most shock levels with a majority functioning after the impact. Debris from the die edges moved at levels greater than 4,000g causing shorts in the actuators and posing reliability concerns. The coupling agent used to prevent stiction in the MEMS release weakened the die-attach bond, which produced failures at 10,000g and above. At 20,000g the authors began to observe structural damage in some of the thin flexures and 2.5-micron diameter pin joints. The authors observed electrical failures caused by the movement of debris. Additionally, they observed a new failure mode where stationary comb fingers contact the ground plane resulting in electrical shorts. These new failure were observed in the control group indicating that they were not shock related.

  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)

    1992-07-01

    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. Real Time Grid Reliability Management 2005

    E-Print Network [OSTI]

    Eto, Joe

    2008-01-01

    W.R. Schmus, D.C. Dawson, “Transmission Voltage RecoveryEnhancing AC-DC Power System Transmission Reliability and

  11. Assessing reliability in energy supply systems

    E-Print Network [OSTI]

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

    2007-01-01

    various fuels and energy supply systems. Acknowledgements WeAssessing Reliability in Energy Supply Systems Ryan W.stability of many energy supply regions becomes more

  12. Assessing Reliability in Energy Supply Systems

    E-Print Network [OSTI]

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

    2008-01-01

    various fuels and energy supply systems. Acknowledgements WeAssessing Reliability in Energy Supply Systems Ryan W.stability of many energy supply regions becomes more

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

    Energy Savers [EERE]

    customers, and improve overall service reliability to reduce customer losses from power disruptions. This report presents findings on smart grid improvements in outage...

  14. Information Concerning Reliability Impacts under Various System...

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

    of sentence redacted) In addition, there is a discussion concerning the impacts of demand side response in addressing this situation. Information Concerning Reliability...

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

    Office of Environmental Management (EM)

    RFI. North American Electric Reliability Corporation (NERC) More Documents & Publications City Utilities of Springfield Missouri Comments on Smart Grid RFI: Addressing Policy and...

  16. 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.

    2000-01-01

    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.

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

    SciTech Connect (OSTI)

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

    1999-01-08

    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.

  18. 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

  19. Reliability Meets Big Data: Opportunities and Challenges

    E-Print Network [OSTI]

    McCalley, James D.

    Reliability Meets Big Data: Opportunities and Challenges William Q. Meeker Department of Statistics maintenance operations. 1.2 Examples of systems providing big data Some examples of particular systems 1, 2013 Abstract Reliability field data such as that obtained from warranty claims and maintenance

  20. RELIABILITY-BASED CASTING PROCESS DESIGN OPTIMIZATION

    E-Print Network [OSTI]

    Beckermann, Christoph

    , shrinkage porosity in the casting. Despite the power and promise of these developments in casting processRELIABILITY-BASED CASTING PROCESS DESIGN OPTIMIZATION Richard Hardin1 , K.K. Choi1 , and Christoph 52242-1527 Keywords: Casting Process Design, Optimization, Reliability-Based Design Optimization

  1. POWER GRID RELIABILITY AND SECURITY

    SciTech Connect (OSTI)

    Bose, Anjan; Venkatasubramanian, Vaithianathan; Hauser, Carl; Bakken, David; Anderson, David; Zhao, Chuanlin; Liu, Dong; Yang, Tao; Meng, Ming; Zhang, Lin; Ning, Jiawei; Tashman, Zaid

    2014-09-30

    This project has led to the development of a real-time simulation platform for electric power grids called Grid Simulator or GridSim for simulating the dynamic and information network interactions of large- scale power systems. The platform consists of physical models of power system components including synchronous generators, loads and control, which are simulated using a modified commercial power simulator namely Transient Stability Analysis Tool (TSAT) [1] together with data cleanup components, as well as an emulated substation level and wide-area power analysis components. The platform also includes realistic representations of communication network middleware that can emulate the real-time information flow back and forth between substations and control centers in wide-area power systems. The platform has been validated on a realistic 6000-bus model of the western American power system. The simulator GridSim developed in this project is the first of its kind in its ability to simulate real-time response of large-scale power grids, and serves as a cost effective real-time stability and control simulation platform for power industry.

  2. Reliability of Coupled Oscillators II: Larger Networks

    E-Print Network [OSTI]

    Kevin K. Lin; Eric Shea-Brown; Lai-Sang Young

    2007-08-23

    We study the reliability of phase oscillator networks in response to fluctuating inputs. Reliability means that an input elicits essentially identical responses upon repeated presentations, regardless of the network's initial condition. In this paper, we extend previous results on two-cell networks to larger systems. The first issue that arises is chaos in the absence of inputs, which we demonstrate and interpret in terms of reliability. We give a mathematical analysis of networks that can be decomposed into modules connected by an acyclic graph. For this class of networks, we show how to localize the source of unreliability, and address questions concerning downstream propagation of unreliability once it is produced.

  3. MEMS reliability: The challenge and the promise

    SciTech Connect (OSTI)

    Miller, W.M.; Tanner, D.M.; Miller, S.L.; Peterson, K.A.

    1998-05-01

    MicroElectroMechanical Systems (MEMS) that think, sense, act and communicate will open up a broad new array of cost effective solutions only if they prove to be sufficiently reliable. A valid reliability assessment of MEMS has three prerequisites: (1) statistical significance; (2) a technique for accelerating fundamental failure mechanisms, and (3) valid physical models to allow prediction of failures during actual use. These already exist for the microelectronics portion of such integrated systems. The challenge lies in the less well understood micromachine portions and its synergistic effects with microelectronics. This paper presents a methodology addressing these prerequisites and a description of the underlying physics of reliability for micromachines.

  4. Creating a Transactive Energy Framework: Improving Reliability and Efficiency

    SciTech Connect (OSTI)

    Melton, Ronald B.

    2013-11-01

    The use of demand response and other flexible distributed resources over the past decade for market efficiency and grid reliability has grown dramatically. Federal and state policy objectives point to an important role for customer loads, generation and storage in the management of an increasingly unpredictable power system. As we consider the need to substantially scale the use of flexible distributed energy resources, there has been growing attention to the need to address not only the economics, but also the control system implications to ensure grid reliability. This has led to a focus on an area of activity called “Transactive Energy.” Transactive Energy refers to the combination of economic and control techniques that improve grid reliability and efficiency. These techniques may also be used to optimize operations within a customer’s facility. The Department of Energy has supported the GridWise® Architecture Council (“the Council”) to develop a framework to provide opportunity for collaboration among the many stakeholders involved in the transformation of the power system.

  5. A Research Roadmap for Computation-Based Human Reliability Analysis

    SciTech Connect (OSTI)

    Boring, Ronald; Mandelli, Diego; Joe, Jeffrey; Smith, Curtis; Groth, Katrina

    2015-08-01

    The United States (U.S.) Department of Energy (DOE) is sponsoring research through the Light Water Reactor Sustainability (LWRS) program to extend the life of the currently operating fleet of commercial nuclear power plants. The Risk Informed Safety Margin Characterization (RISMC) research pathway within LWRS looks at ways to maintain and improve the safety margins of these plants. The RISMC pathway includes significant developments in the area of thermalhydraulics code modeling and the development of tools to facilitate dynamic probabilistic risk assessment (PRA). PRA is primarily concerned with the risk of hardware systems at the plant; yet, hardware reliability is often secondary in overall risk significance to human errors that can trigger or compound undesirable events at the plant. This report highlights ongoing efforts to develop a computation-based approach to human reliability analysis (HRA). This computation-based approach differs from existing static and dynamic HRA approaches in that it: (i) interfaces with a dynamic computation engine that includes a full scope plant model, and (ii) interfaces with a PRA software toolset. The computation-based HRA approach presented in this report is called the Human Unimodels for Nuclear Technology to Enhance Reliability (HUNTER) and incorporates in a hybrid fashion elements of existing HRA methods to interface with new computational tools developed under the RISMC pathway. The goal of this research effort is to model human performance more accurately than existing approaches, thereby minimizing modeling uncertainty found in current plant risk models.

  6. PV Module Reliability Research (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-06-01

    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. RELIABILITY PLANNING IN DISTRIBUTED ELECTRIC ENERGY SYSTEMS

    E-Print Network [OSTI]

    Kahn, E.

    2011-01-01

    Edward, Reliability of Wind Power from Dispersed Sites:The same is true for wind power. This Even over hundreds ofof (11) also shows how wind power output distributi.on

  8. Reliability of copper interconnects in integrated circuits

    E-Print Network [OSTI]

    Choi, Zung-Sun

    2007-01-01

    As dimensions shrink and current densities increase, the reliability of metal interconnects becomes a serious concern. In copper interconnects, the dominant diffusion path is along the interface between the copper and the ...

  9. Reliability Issues for Photovoltaic Modules (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2009-10-01

    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. Reliability Challenges for Solar Energy (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2009-04-27

    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.

  11. Demand Response For Power System Reliability: FAQ

    SciTech Connect (OSTI)

    Kirby, Brendan J [ORNL

    2006-12-01

    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.

  12. Gearbox Reliability Collaborative (GRC) Description and Loading

    SciTech Connect (OSTI)

    Oyague, F.

    2011-11-01

    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.

  13. System Reliability for LED-Based Products

    SciTech Connect (OSTI)

    Davis, J Lynn; Mills, Karmann; Lamvik, Michael; Yaga, Robert; Shepherd, Sarah D; Bittle, James; Baldasaro, Nick; Solano, Eric; Bobashev, Georgiy; Johnson, Cortina; Evans, Amy

    2014-04-07

    Results from accelerated life tests (ALT) on mass-produced commercially available 6” downlights are reported along with results from commercial LEDs. The luminaires capture many of the design features found in modern luminaires. In general, a systems perspective is required to understand the reliability of these devices since LED failure is rare. In contrast, components such as drivers, lenses, and reflector are more likely to impact luminaire reliability than LEDs.

  14. Dormant storage reliability assessments-data based

    SciTech Connect (OSTI)

    Merren, G.T.

    1981-01-01

    A relatively large amount of data pertaining to the performance of certain electronic parts after long periods of dormant storage has been collected and analyzed by the Reliability Department of Sandia National Laboratories. The failure models used by Sandia are presented and reliability assessments for selected electronic parts derived from these models and the measured performance data are provided. These data based assessments are compared to similar assessments derived from handbook calculations using the general data and models provided in the handbooks.

  15. WEBCASRE: A WEBBASED TOOL FOR SOFTWARE RELIABILITY MODELING

    E-Print Network [OSTI]

    Lyu, Michael R.

    of overall system reliability. This trend makes the estimation of software reliability more and more critical to most large­scale projects in their reliability engineering aspects. Traditionally, software reliabilityWEB­CASRE: A WEB­BASED TOOL FOR SOFTWARE RELIABILITY MODELING Michael R. Lyu \\Lambda JË?urgen Sch

  16. Research Areas

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid youOxygen Generation |Publications TheGashome /Areas Research Areas

  17. Failure and Reliability Analysis for the Master Pump Shutdown System

    SciTech Connect (OSTI)

    BEVINS, R.R.

    2000-09-05

    The Master Pump Shutdown System (MPSS) will be installed in the 200 Areas of the Hanford Site to monitor and control the transfer of liquid waste between tank farms and between the 200 West and 200 East areas through the Cross-Site Transfer Line. The Safety Function provided by the MPSS is to shutdown any waste transfer process within or between tank farms if a waste leak should occur along the selected transfer route. The MPSS, which provides this Safety Class Function, is composed of Programmable Logic Controllers (PLCs), interconnecting wires, relays, Human to Machine Interfaces (HMI), and software. These components are defined as providing a Safety Class Function and will be designated in this report as MPSS/PLC. Input signals to the MPSS/PLC are provided by leak detection systems from each of the tank farm leak detector locations along the waste transfer route. The combination of the MPSS/PLC, leak detection system, and transfer pump controller system will be referred to as MPSS/SYS. The components addressed in this analysis are associated with the MPSS/SYS. The purpose of this failure and reliability analysis is to address the following design issues of the Project Development Specification (PDS) for the MPSS/SYS (HNF 2000a): (1) Single Component Failure Criterion, (2) System Status Upon Loss of Electrical Power, (3) Physical Separation of Safety Class cables, (4) Physical Isolation of Safety Class Wiring from General Service Wiring, and (5) Meeting the MPSS/PLC Option 1b (RPP 1999) Reliability estimate. The failure and reliability analysis examined the system on a component level basis and identified any hardware or software elements that could fail and/or prevent the system from performing its intended safety function.

  18. TO BE PRESENTED AT 2006 POWERCON, CHONGQING, CHINA, OCT 2006 A Hybrid Method for Multi-Area Generation

    E-Print Network [OSTI]

    -Area Generation Expansion using Tabu-search and Dynamic Programming Panida Jirutitijaroen, Student Member, IEEE using dynamic programming for the solution of generation expansion and placement considering reliability, Reliability, Tabu Search, Power System Optimization, Global Decomposition, Generation Adequacy, Dynamic

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

    E-Print Network [OSTI]

    Pearson, Crystal Anne

    2009-05-15

    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 ...

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

    E-Print Network [OSTI]

    Danda, Santosh Rao

    2014-08-12

    empirical data to take an initial step toward understanding the importance of travel time reliability. Katy Freeway travelers face a daily choice between reliable tolled lanes and less reliable but untolled lanes. An extensive dataset of Katy Freeway travel...

  1. Owner/Operator Perspective on Reliability Customer Needs and...

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

    SERVICES AS RELIABLE AS THE SUN OwnerOperator Perspective on Reliability Customer Needs and Field Data Sandia National Laboratories Utility-Scale Grid-Tied PV Inverter Reliability...

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

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

    The Business Case for Fuel Cells 2013: Reliability, Resiliency & Savings The Business Case for Fuel Cells 2013: Reliability, Resiliency & Savings This report, compiled by Fuel...

  3. 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...

  4. System Reliability Model for Solid-State Lighting Luminaires...

    Energy Savers [EERE]

    System Reliability Model for Solid-State Lighting Luminaires System Reliability Model for Solid-State Lighting Luminaires Lead Performer: RTI International - Research Triangle...

  5. 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 ...

  6. Reliable estimation of biochemical parameters from C3 leafphotosynthe...

    Office of Scientific and Technical Information (OSTI)

    Reliable estimation of biochemical parameters from C3 leaf photosynthesis-intercellular carbon dioxide response curves Citation Details In-Document Search Title: Reliable...

  7. Characterizing wind power resource reliability in southern Africa...

    Office of Scientific and Technical Information (OSTI)

    DOE PAGES Search Results Published Article: Characterizing wind power resource reliability in southern Africa Title: Characterizing wind power resource reliability in southern...

  8. 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...

  9. CHP SYSTEM AT FOOD PROCESSING PLANT INCREASES RELIABILITY AND...

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

    CHP SYSTEM AT FOOD PROCESSING PLANT INCREASES RELIABILITY AND REDUCES EMISSIONS - CASE STUDY, 2015 CHP SYSTEM AT FOOD PROCESSING PLANT INCREASES RELIABILITY AND REDUCES EMISSIONS -...

  10. Data Center Efficiency and IT Equipment Reliability at Wider...

    Energy Savers [EERE]

    Data Center Efficiency and IT Equipment Reliability at Wider Operating Temperature and Humidity Ranges Data Center Efficiency and IT Equipment Reliability at Wider Operating...

  11. Office of Electricity Delivery and Energy Reliability Cyber Security...

    Energy Savers [EERE]

    Office of Electricity Delivery and Energy Reliability Cyber Security Project Selections Office of Electricity Delivery and Energy Reliability Cyber Security Project Selections On...

  12. 2013 Reliability & Markets Peer Review | Department of Energy

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

    the links. The agenda and list of presentations are included below. The Reliability and Markets activity of the Transmission Reliability program researches, develops, and...

  13. 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...

  14. Addressing mechanical reliability issues in Sandia MEMS devices...

    Office of Scientific and Technical Information (OSTI)

    Addressing mechanical reliability issues in Sandia MEMS devices. Citation Details In-Document Search Title: Addressing mechanical reliability issues in Sandia MEMS devices. No...

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

    Energy Savers [EERE]

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

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

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

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

  17. 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

  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.

    1999-01-01

    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. Gearbox Reliability Collaborative Update: A Brief (Presentation)

    SciTech Connect (OSTI)

    Sheng, S.; Keller, J.; McDade, M.

    2012-01-01

    This presentation is an update on the Gearbox Reliability Collaborative (GRC) for the AWEA Wind Project Operations, Maintenance & Reliability Seminar. GRC accomplishments are: (1) Failure database software deployed - partners see business value for themselves and customers; (2) Designed, built, instrumented, and tested two gearboxes - (a) Generated unprecedented public domain test data from both field testing and dynamometer testing, (b) Different responses from 'identical' gearboxes, (c) Demonstrated importance of non-torque loading and modeling approach; and (3) Active collaborative, with wide industry support, leveraging DOE funding - Modeling round robin and Condition Monitoring round robin.

  20. Reliability of Wireless On-Chip Interconnects Based on Carbon Nanotube Antennas

    E-Print Network [OSTI]

    Pande, Partha Pratim

    Reliability of Wireless On-Chip Interconnects Based on Carbon Nanotube Antennas A. Nojeh1 , P Engineering University of British Columbia 2332 Main Mall Vancouver, BC, Canada 2 School of Electrical of the research effort in the emerging area of nanoelectronics has revolved around creating novel devices

  1. Doctoral Defense "Structural reliability assessment under fire"

    E-Print Network [OSTI]

    Kamat, Vineet R.

    Doctoral Defense "Structural reliability assessment under fire" Qianru Guo Date: December 11, 2014 Engineering Structural safety under fire has received significant attention in recent years. Current approaches to structural fire design are based on prescriptive codes that emphasize insulation of steel

  2. The challenge of reliability in MEMS commercialization

    SciTech Connect (OSTI)

    Miller, W.M.; Tanner, D.M.; Miller, S.L.

    1998-09-01

    MicroElectroMechanical Systems (MEMS) that think, sense, act and communicate will open up a broad new array of cost-effective solutions only if MEMS is demonstrated to be sufficiently reliable. This could prove to be a major challenge if it is not addressed concurrently with technology development. There are three requirements for a valid assessment of reliability: statistical significance, identification of fundamental failure mechanisms and development of techniques for accelerating them, and valid physical models to allow prediction of failures during actual use. While these already exist for the microelectronics portion of such integrated systems, the real challenge lies in the less well-understood micromachine portions and its synergistic effects with microelectronics. This requires the elicitation of a methodology focused on MEMS reliability, which the authors discuss. A new testing and analysis infrastructure must also be developed to meet the needs of this methodology. They describe their implementation of this infrastructure and its success in addressing the three requirements for a valid reliability assessment.

  3. Reliability based casting process design optimisation

    E-Print Network [OSTI]

    Beckermann, Christoph

    , which is typically defined as an absence of, or low level of, shrinkage porosity in the casting. DespiteReliability based casting process design optimisation R. A. Hardin, K. K. Choi, N. J. Gaul and C and physical uncertainties in the casting process. In the present research, casting simulation is integrated

  4. Wind Energy Facility Reliability and Maintenance

    E-Print Network [OSTI]

    Ding, Yu

    from 18 GW to 152 GW over the past decade. According to the north American electric reliability constitute a substantial portion of the total costs of wind power production [2­4]. Field data from Germany to a few weeks. Overall, O&M costs account for 20-47.5% of the wholesale market price [4]. Considering

  5. Value-based reliability transmission planning

    SciTech Connect (OSTI)

    Dalton, J.G. III; Garrison, D.L.; Fallon, C.M.

    1996-08-01

    This paper presents a new value-based reliability planning (VBRP) process proposed for planning Duke Power Company`s (DPC) regional transmission system. All transmission served customers are fed from DPC`s regional transmission system which consists of a 44-kV predominantly radial system and a 100-kV predominantly non-radial system. In the past, any single contingency that could occur during system peak conditions and cause a thermal overload required the overloaded facility to be upgraded, regardless of the costs or the likelihood of the overload occurring. The new VBRP process is based on transmission system reliability evaluation and includes the following important elements: (1) a ten-year historical data base describing the probabilities of forced outages for lines and transformers; (2) a five-year average load duration curve describing the probability of an overload should a contingency occur; (3) a customer outage cost data base; (4) and probabilistic techniques. The new process attempts to balance the costs of improving service reliability with the benefits or value that these improvements bring to these customers. The objective is to provide the customers their required level of reliability while minimizing the Total Cost of their electric service.

  6. Current Human Reliability Analysis Methods Applied to Computerized Procedures

    SciTech Connect (OSTI)

    Ronald L. Boring

    2012-06-01

    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.

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

    SciTech Connect (OSTI)

    Ronald Laurids Boring

    2010-11-01

    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.

  8. Electronic logic for enhanced switch reliability

    DOE Patents [OSTI]

    Cooper, J.A.

    1984-01-20

    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.

  9. Sample sizes for confidence limits for reliability.

    SciTech Connect (OSTI)

    Darby, John L.

    2010-02-01

    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.

  10. Reliability Estimation for Double Containment Piping

    SciTech Connect (OSTI)

    L. Cadwallader; T. Pinna

    2012-08-01

    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.

  11. Subsea pipeline isolation systems: Reliability and costs

    SciTech Connect (OSTI)

    Masheder, R.R.

    1996-08-01

    Since the Piper Alpha disaster, more than 80 subsea isolation systems (SSIS) have been installed in subsea gas and oil pipelines in the U.K. continental shelf at an estimated cost in the region of {Brit_pounds}500 million. The reliability and costs of these installations have now been assessed between Dec. 1992 and Oct. 1993. This assessment was based upon comprehensive reliability and cost databases which were established so that the studies could be based upon factual information in order to obtain a current status as required by the sponsoring group. The study consultants report findings have now been consolidated into a report by the UKOOA Pipeline Valve Work Group. Probabilities of failure for different types of valves and systems have been assessed and expenditures broken down and compared. The results of the studies and the conclusions drawn by UKOOA Pipeline Valve Group and the HSE Offshore Safety Division are presented in this paper.

  12. Reliability assessment of underground shaft closure

    SciTech Connect (OSTI)

    Fossum, A.F.

    1994-12-31

    The intent of the WIPP, being constructed in the bedded geologic salt deposits of Southeastern New Mexico, is to provide the technological basis for the safe disposal of radioactive Transuranic (TRU) wastes generated by the defense programs of the United States. In determining this technological basis, advanced reliability and structural analysis techniques are used to determine the probability of time-to-closure of a hypothetical underground shaft located in an argillaceous salt formation and filled with compacted crushed salt. Before being filled with crushed salt for sealing, the shaft provides access to an underground facility. Reliable closure of the shaft depends upon the sealing of the shaft through creep closure and recompaction of crushed backfill. Appropriate methods are demonstrated to calculate cumulative distribution functions of the closure based on laboratory determined random variable uncertainty in salt creep properties.

  13. Reliability Considerations from Integration of Smart Grid

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested PartiesBuildingBudgetFinancialReliability Considerations from the Integration

  14. Reliability of natural gas cogeneration systems

    SciTech Connect (OSTI)

    1995-12-01

    Cogeneration systems fueled by natural gas exceed the reliability of most central station power generating units, according to a study conducted by RINC Corporation for Gas Research Institute (GRI). In the study, researchers obtained operating data from 122 natural gas cogeneration units nationwide representing 2,200 megawatts (MW) of capacity and nearly 2 million hours of operating time at 37 facilities. Units were grouped into categories reflecting size (from 60 kilowatts to 100 MW), type of system (gas engine or gas turbine technology), use of emission controls, and type of thermal application. Various types and sizes of gas systems reported average availability factors ranging from 90.0 to 95.8 versus a weighted average of 85.9 percent for fossil-fuel steam, nuclear, and gas-turbine-based central station power generating units. Comparisons are based on study data and data reported by the North American Electric Reliability Council for utility power plants. Gas cogeneration can improve utility operations because as a group the relatively small, dispersed cogeneration units are more reliable than one or more large central station units of similar capacity.

  15. 2010 Transmission Reliability Program Peer Review | Department...

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

    the system. The second area focuses on developing a comprehensive set of integrated market and engineering design principles, tools, and technologies to support efficient,...

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

    SciTech Connect (OSTI)

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

    2013-09-01

    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.

  17. Energy Storage: The Key to a Reliable, Clean Electricity Supply...

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

    Energy Storage: The Key to a Reliable, Clean Electricity Supply Energy Storage: The Key to a Reliable, Clean Electricity Supply February 22, 2012 - 4:52pm Addthis Improved energy...

  18. Case Study: Fuel Cells Increase Reliability at First National...

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

    Increase Reliability at First National Bank of Omaha Case Study: Fuel Cells Increase Reliability at First National Bank of Omaha First National Bank of Omaha installed a fuel cell...

  19. SUGGESTED ANALYTIC APPROACH TO TRANSMISSION RELIABILITY MARGIN

    E-Print Network [OSTI]

    Zhang Ian Dobson Fernando L. Alvarado POWER SYSTEMS ENGINEERING RESEARCH CENTER Electrical & Computer to TRM. 1 Introduction Successful implementation of electric power deregu- lation requires powers flowing on all the lines which directly connect one area to the other area. A list

  20. Final report on reliability and lifetime prediction.

    SciTech Connect (OSTI)

    Gillen, Kenneth Todd; Wise, Jonathan; Jones, Gary D.; Causa, Al G.; Terrill, Edward R.; Borowczak, Marc

    2012-12-01

    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.

  1. Reliability and Functional Availability of HVAC Systems 

    E-Print Network [OSTI]

    Myrefelt, S.

    2004-01-01

    the probability that a component or a system works when no maintenance is made. A system with a high reliability thus has minimal maintenance requirements; it is a robust system. The decision capability is used to assess the organisation?s capacity to start... the system is in operation in relation to intended operating time. It mainly shows the technical capability to keep on operating while maintenance is being carried out. Systems that must be taken out of operation for longer repair works have a lower level...

  2. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAbout UsRegional companiesReliability Technology

  3. Sandia Energy - Materials, Reliability, & Standards

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II)Geothermal Energy &Water Power& SF-BREEZEMaterials, Reliability,

  4. Human Reliability Program (HRP) - HPMC Occupational Health Services

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

    EpidemiologyHealth Data Analysis Human Reliability Program (HRP) Industrial Rehabilitation & Ergonomics Infection Control & Immunizations Influenza Immunization Program...

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

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

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

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

    Energy Savers [EERE]

    Publications The Relationship between Competitive Power Markets and Grid Reliability. Blackout 2003: Electric System Working Group Technical Conference - Comments and...

  7. Reliable and Energy Efficient Transport Layer for Sensor Networks

    E-Print Network [OSTI]

    Valaee, Shahrokh

    Reliable and Energy Efficient Transport Layer for Sensor Networks Petar Djukic and Shahrokh Valaee Diversity Coded Directed Diffusion (DCDD), a reliable and energy efficient transport protocol for sensor-to-end reliability, as well as the effect of DCDD on energy consumption in the network. Our simulations show

  8. Reliable Provisioning of Data-Centric and Event-Based

    E-Print Network [OSTI]

    Dustdar, Schahram

    Reliable Provisioning of Data-Centric and Event-Based Applications in the Cloud DISSERTATION zur A-1040 Wien Karlsplatz 13 Tel. +43-1-58801-0 www.tuwien.ac.at #12;#12;Reliable Provisioning of Data-Centric a set of novel methods and tools for reliable provisioning of data-centric and event-based applications

  9. Comparison of Competing Software Reliability Models: Bayesian Model Selection

    E-Print Network [OSTI]

    Basu, Sanjib

    is in software development and testing. The goal of software reliability research is to quantify the performanceComparison of Competing Software Reliability Models: Bayesian Model Selection Sanjib Basu and Nader@math.niu.edu and nader@math.niu.edu Abstract Software reliability models are used to describe the evolution

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

    E-Print Network [OSTI]

    contingency selection, (b) effects analysis, and (c) reliability index computation. Effects analysis as an optimization problem with the objective function being the bid cost function and congestion constraints and reliability index computations. The methodology is demonstrated with the IEEE reliability test system. Index

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

    SciTech Connect (OSTI)

    Kurtz, S.

    2014-02-01

    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.

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

    SciTech Connect (OSTI)

    Kurtz, S.

    2013-10-01

    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.

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

    SciTech Connect (OSTI)

    Kurtz, J.

    2013-11-01

    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.

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

    SciTech Connect (OSTI)

    Kurtz, S.

    2013-11-01

    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.

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

    SciTech Connect (OSTI)

    Kurtz, S.

    2013-11-01

    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. Final report for CCS cross-layer reliability visioning study

    SciTech Connect (OSTI)

    Quinn, Heather M; Dehon, Andre; Carter, Nicj

    2010-12-20

    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

  17. Real Time Grid Reliability Management 2005

    SciTech Connect (OSTI)

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

    2008-07-07

    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.

  18. Using wind plant data to increase reliability.

    SciTech Connect (OSTI)

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

    2011-01-01

    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.

  19. Multi-Channel Reliability and Spectrum Usage in Real Homes: Empirical Studies for Home-Area

    E-Print Network [OSTI]

    Lu, Chenyang

    passive spectrum analysis across the entire 2.4 GHz band over seven days in each apartment. We find technology can be used to easily and inexpensively retrofit existing apartments and households without

  20. Puget Sound Area Electric Reliability Plan : Supplemental Environmental Analysis, Schultz Substation.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    1992-04-01

    This document describes the purpose, function, and the environmental consequences of the proposed Schultz substation near Ellensburg, Washington. The affected environment is described in detail, including aerial survey photographs. The impacts on vegetation, fish and wildlife, soils, and water resources are described. (GHH)

  1. Demand Response as a System Reliability Resource

    E-Print Network [OSTI]

    Joseph, Eto

    2014-01-01

    notices/2008-08-05_RFP_smartgrid/presentations/PIER-the three deployment plans. SmartGrid 2020 Roadmaps Areas ofresponse capabilities. IOU SmartGrid Deployment Plans The

  2. A statistical analysis of personnel contaminations in 200 Area facilities

    SciTech Connect (OSTI)

    Wagner, M.A.; Stoddard, D.H.

    1983-05-18

    This study determined the frequency statistics of personnel contaminations in 200 Area facilities. These statistics are utilized in probability calculations for contamination risks, and are part of an effort to provide reliable information for use in safety studies. Data for this analysis were obtained from the 200 Area and the Tritium Area Fault Tree Data Banks and were analyzed with the aid of the STATPAC computer code.

  3. An evaluation of the reliability and usefulness of external-initiator PRA (probabilistic risk analysis) methodologies

    SciTech Connect (OSTI)

    Budnitz, R.J.; Lambert, H.E. (Future Resources Associates, Inc., Berkeley, CA (USA))

    1990-01-01

    The discipline of probabilistic risk analysis (PRA) has become so mature in recent years that it is now being used routinely to assist decision-making throughout the nuclear industry. This includes decision-making that affects design, construction, operation, maintenance, and regulation. Unfortunately, not all sub-areas within the larger discipline of PRA are equally mature,'' and therefore the many different types of engineering insights from PRA are not all equally reliable. 93 refs., 4 figs., 1 tab.

  4. Wildlife Management Areas (Florida)

    Broader source: Energy.gov [DOE]

    Certain sites in Florida are designated as wildlife management areas, and construction and development is heavily restricted in these areas.

  5. Advancing Usability Evaluation through Human Reliability Analysis

    SciTech Connect (OSTI)

    Ronald L. Boring; David I. Gertman

    2005-07-01

    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.

  6. HUMAN RELIABILITY ANALYSIS FOR COMPUTERIZED PROCEDURES

    SciTech Connect (OSTI)

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

    2011-09-01

    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.

  7. Nuclear Power - Control, Reliability and Human Factors 

    E-Print Network [OSTI]

    2011-01-01

    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... s and state of equi p me n t , includ i n g nucle a r react o r s of power plant s . The metrol o gi c a l reliab i li t y of meas uri n g instrum e n t s built in equi p me n t deter mi n e s the valid i t y of measure me nt infor ma t i o n . The qualit y...

  8. 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.

  9. Human Reliability Analysis for Small Modular Reactors

    SciTech Connect (OSTI)

    Ronald L. Boring; David I. Gertman

    2012-06-01

    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.

  10. Probabilistic fatigue methodology and wind turbine reliability

    SciTech Connect (OSTI)

    Lange, C.H. [Stanford Univ., CA (United States)

    1996-05-01

    Wind turbines subjected to highly irregular loadings due to wind, gravity, and gyroscopic effects are especially vulnerable to fatigue damage. The objective of this study is to develop and illustrate methods for the probabilistic analysis and design of fatigue-sensitive wind turbine components. A computer program (CYCLES) that estimates fatigue reliability of structural and mechanical components has been developed. A FORM/SORM analysis is used to compute failure probabilities and importance factors of the random variables. The limit state equation includes uncertainty in environmental loading, gross structural response, and local fatigue properties. Several techniques are shown to better study fatigue loads data. Common one-parameter models, such as the Rayleigh and exponential models are shown to produce dramatically different estimates of load distributions and fatigue damage. Improved fits may be achieved with the two-parameter Weibull model. High b values require better modeling of relatively large stress ranges; this is effectively done by matching at least two moments (Weibull) and better by matching still higher moments. For this purpose, a new, four-moment {open_quotes}generalized Weibull{close_quotes} model is introduced. Load and resistance factor design (LRFD) methodology for design against fatigue is proposed and demonstrated using data from two horizontal-axis wind turbines. To estimate fatigue damage, wind turbine blade loads have been represented by their first three statistical moments across a range of wind conditions. Based on the moments {mu}{sub 1}{hor_ellipsis}{mu}{sub 3}, new {open_quotes}quadratic Weibull{close_quotes} load distribution models are introduced. The fatigue reliability is found to be notably affected by the choice of load distribution model.

  11. ULTRA SECURE HIGH RELIABILITY WIRELESS RADIATION MONITOR

    SciTech Connect (OSTI)

    Cordaro, J.; Shull, D.; Farrar, M.; Reeves, G.

    2011-08-03

    Radiation monitoring in nuclear facilities is essential to safe operation of the equipment as well as protecting personnel. In specific, typical air monitoring of radioactive gases or particulate involves complex systems of valves, pumps, piping and electronics. The challenge is to measure a representative sample in areas that are radioactively contaminated. Running cables and piping to these locations is very expensive due to the containment requirements. Penetration into and out of an airborne or containment area is complex and costly. The process rooms are built with thick rebar-enforced concrete walls with glove box containment chambers inside. Figure 1 shows high temperature radiation resistance cabling entering the top of a typical glove box. In some case, the entire processing area must be contained in a 'hot cell' where the only access into the chamber is via manipulators. An example is shown in Figure 2. A short range wireless network provides an ideal communication link for transmitting the data from the radiation sensor to a 'clean area', or area absent of any radiation fields or radioactive contamination. Radiation monitoring systems that protect personnel and equipment must meet stringent codes and standards due to the consequences of failure. At first glance a wired system would seem more desirable. Concerns with wireless communication include latency, jamming, spoofing, man in the middle attacks, and hacking. The Department of Energy's Savannah River National Laboratory (SRNL) has developed a prototype wireless radiation air monitoring system that address many of the concerns with wireless and allows quick deployment in radiation and contamination areas. It is stand alone and only requires a standard 120 VAC, 60 Hz power source. It is designed to be mounted or portable. The wireless link uses a National Security Agency (NSA) Suite B compliant wireless network from Fortress Technologies that is considered robust enough to be used for classified data transmission in place of NSA Type 1 devices.

  12. Area Activation 1 Running Head: AREA ACTIVATION

    E-Print Network [OSTI]

    Pomplun, Marc

    Area Activation 1 Running Head: AREA ACTIVATION Advancing Area Activation towards a General Model at Boston 100 Morrissey Boulevard Boston, MA 02125-3393 USA Phone: 617-287-6485 Fax: 617-287-6433 e. Without great effort, human observers clearly outperform every current artificial vision system in tasks

  13. Reliability study of an emerging fire suppression system

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

    Miller, David A.; Rossati, Lyric M.; Fritz, Nathan K.; Cournoyer, Michael E.; Granzow, Howard N.

    2015-02-07

    Self-contained fire extinguishers are a robust, reliable and minimally invasive means of fire suppression for gloveboxes. Plutonium gloveboxes are known to present harsh environmental conditions for polymer materials, these include radiation damage and chemical exposure, both of which tend to degrade the lifetime of engineered polymer components. The primary component of interest in self-contained fire extinguishers is the nylon 6-6 machined tube that comprises the main body of the system.Thermo-mechanical modeling and characterization of nylon 6-6 for use in plutonium glovebox applications has been carried out. Data has been generated regarding property degradation leading to poor, or reduced, engineering performancemore »of nylon 6-6 components. In this study, nylon 6-6 tensile specimens conforming to the casing of self-contained fire extinguisher systems have been exposed to hydrochloric, nitric, and sulfuric acids. This information was used to predict the performance of a load bearing engineering component comprised of nylon 6-6 and designed to operate in a consistent manner over a specified time period. The study provides a fundamental understanding of the engineering performance of the fire suppression system and the effects of environmental degradation due to acid exposure on engineering performance. Data generated help identify the limitations of self-contained fire extinguishers. No critical areas of concern for plutonium glovebox applications of nylon 6-6 have been identified when considering exposure to mineral acid.« less

  14. Human Reliability Considerations for Small Modular Reactors

    SciTech Connect (OSTI)

    OHara J. M.; Higgins, H.; DAgostino, A.; Erasmia, L.

    2012-01-27

    Small modular reactors (SMRs) are a promising approach to meeting future energy needs. Although the electrical output of an individual SMR is relatively small compared to that of typical commercial nuclear plants, they can be grouped to produce as much energy as a utility demands. Furthermore, SMRs can be used for other purposes, such as producing hydrogen and generating process heat. The design characteristics of many SMRs differ from those of current conventional plants and may require a distinct concept of operations. The U.S. Nuclear Regulatory Commission (NRC) conducted research to examine the human factors engineering and the operational aspects of SMRs. The research identified thirty potential human-performance issues that should be considered in the NRC's reviews of SMR designs and in future research activities. The purpose of this report is to illustrate how the issues can support SMR probabilistic risk analyses and their review by identifying potential human failure events for a subset of the issues. As part of addressing the human contribution to plant risk, human reliability analysis practitioners identify and quantify the human failure events that can negatively impact normal or emergency plant operations. The results illustrated here can be generalized to identify additional human failure events for the issues discussed and can be applied to those issues not discussed in this report.

  15. Individual Differences in Human Reliability Analysis

    SciTech Connect (OSTI)

    Jeffrey C. Joe; Ronald L. Boring

    2014-06-01

    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.

  16. High reliability plastic packaging for microelectronics

    SciTech Connect (OSTI)

    Sweet, J.N.; Peterson, D.W.; Hsia, A.H.; Tuck, M.

    1997-07-01

    Goal was Assembly Test Chips (ATCs) which could be used for evaluating plastic encapsulation technologies. Circuits were demonstrated for measuring Au-Al wirebond and Al metal corrosion failure rates during accelerated temperature and humidity testing. The test circuits on the ATC02.5 chip were very sensitive to extrinsic or processing induced failure rates. Accelerated aging experiments were conducted with unpassivated triple track Al structures on the ATC02.6 chip; the unpassivated tracks were found to be very sensitive to particulate contamination. Some modifications to existing circuitry were suggested. The piezoresistive stress sensing circuitry designed for the ATC04 test chip was found suitable for determining the change in the state of mechanical stress at the die when both initial and final measurements were made near room temperature (RT). Attempt to measure thermal stress between RT and a typical polymer glass transition temperature failed because of excessive die resistor- substrate leakage currents at the high temperature end; suitable circuitry changes were developed to overcome this problem. One temperature and humidity experiment was conducted with Sandia developed static radom access memory parts to examine non-corrosion CMOS failures; this objective was not achieved, but corrosion failure at the metal to Si contacts on the die surface could be detected. This 2-year effort resulted in new designs for test circuits which could be used on an advanced ATC for reliability assessment in Defense Programs electronics development projects.

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

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

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

  18. Reliability of Coupled Oscillators I: Two-Oscillator Systems

    E-Print Network [OSTI]

    Kevin K. Lin; Eric Shea-Brown; Lai-Sang Young

    2007-08-23

    This paper concerns the reliability of a pair of coupled oscillators in response to fluctuating inputs. Reliability means that an input elicits essentially identical responses upon repeated presentations regardless of the network's initial condition. Our main result is that both reliable and unreliable behaviors occur in this network for broad ranges of coupling strengths, even though individual oscillators are always reliable when uncoupled. A new finding is that at low input amplitudes, the system is highly susceptible to unreliable responses when the feedforward and feedback couplings are roughly comparable. A geometric explanation based on shear-induced chaos at the onset of phase-locking is proposed.

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

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

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

  20. POWER, THERMAL, AND RELIABILITY MODELING IN NANOMETER-SCALE

    E-Print Network [OSTI]

    Brooks, David

    ........................................................................................................................................................................................................................................................ POWER ........................................................................................................................................................................................................................................................ POWER IS THE SOURCE OF THE GREATEST PROBLEMS FACING MICROPROCESSOR DESIGNERS. RAPID POWER VARIATION BRINGS TRANSIENT ERRORS. HIGH POWER DENSITIES BRING HIGH TEMPERATURES, HARMING RELIABILITY AND INCREASING

  1. 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)...

  2. Reliability Tools for Resonance Inspection of Light Metal Castings...

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

    Tools for Resonance Inspection of Light Metal Castings Reliability Tools for Resonance Inspection of Light Metal Castings 2012 DOE Hydrogen and Fuel Cells Program and Vehicle...

  3. Summary of the Optics, IR, Injection, Operations, Reliability...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Summary of the Optics, IR, Injection, Operations, Reliability and Instrumentation Working Group Citation Details In-Document Search Title: Summary of the Optics,...

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

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

    design, wind industry data collection and storage techniques, and analysis methods. The IEA Task 33 Working Group on Reliability Data unites experts from around the world, with...

  5. Clean, Efficient, and Reliable Power for the 21st Century

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

    and combined-heat-and-power, where they provide unparalleled reliability and en- hanced efficiency. Continuing technological progress will enable fuel cells to compete in new...

  6. Combined Heat and Power System Enables 100% Reliability at Leading...

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

    buildings on nearly 1,000 acres. Photo courtesy of Thermal Energy Corporation Combined Heat and Power System Enables 100% Reliability at Leading Medical Campus Recovery Act...

  7. 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...

  8. Separating myths from reality in PV inverter reliability

    E-Print Network [OSTI]

    Rollins, Andrew M.

    . · This is based upon a LCOE of 5 cents per kWh, so reliability is critical · MTBF of string inverters in 2006: 5

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

    Office of Environmental Management (EM)

    Electronics Reliability Analysis Annual DOE Peer Review Meeting October 8, 2009 Mark A. Smith - Systems Readiness & Sustainment Technologies Department Stan Atcitty - Energy...

  10. 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...

  11. Guide to Using Combined Heat and Power for Enhancing Reliability...

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

    Heat and Power for Enhancing Reliability and Resiliency in Buildings During and after Hurricane Sandy, combined heat and power (CHP) enabled a number of critical infrastructure and...

  12. 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.

    2011-06-01

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

  13. Reliability Testing of Polysilicon For MEMs Devices

    SciTech Connect (OSTI)

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

    1999-04-05

    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.

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

    E-Print Network [OSTI]

    SCORE: a Scalable Concolic Testing Tool for Reliable Embedded Software Yunho Kim and Moonzoo Kim COncolic testing tool for REliable embedded software (SCORE) that targets embedded C programs. SCORE is a de-facto standard method for improving the quality of software in industry. Conventional testing

  15. INTELLIGENT SENSOR VALIDATION AND SENSOR FUSION FOR RELIABILITY AND SAFETY

    E-Print Network [OSTI]

    Agogino, Alice M.

    1 INTELLIGENT SENSOR VALIDATION AND SENSOR FUSION FOR RELIABILITY AND SAFETY ENHANCEMENT IN VEHICLE #12;2 Intelligent Sensor Validation and Sensor Fusion for Reliability and Safety Enhancement acknowledge the help of PATH engineers Pete Devlin, Seibum Choi, and Leon Chen. II. Keywords Sensor Validation

  16. 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

  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-5069, USA Received in final form 25 February 2002 AB ST R AC T Failure of the ceramic gun-barrel lining probability for the lining is also discussed. Keywords failure; gun-barrel lining; reliability; thermo

  18. EE 851.3 (3L) Power System Reliability

    E-Print Network [OSTI]

    Saskatchewan, University of

    EE 851.3 (3L) Power System Reliability Department of Electrical and Computer Engineering Winter and Program Catalogue) Prerequisites: EE 850 or prior knowledge of reliability engineering concepts Instructor: Rajesh Karki, Ph.D., P.Eng. Associate Professor, Department of Electrical and Computer Engineering Office

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

    SciTech Connect (OSTI)

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

    2013-10-01

    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.

  20. An Empirical Study of the Reliability UNIX Utilities

    E-Print Network [OSTI]

    Miller, Barton P.

    An Empirical Study of the Reliability of UNIX Utilities Barton P. Miller bart@cs.wisc.edu Lars, such as the kernel and utility programs, are typically assumed to be reliable. In our recent experiments, we have been able to crash 25­33% of the utility programs on any version of UNIX that was tested. This report

  1. An Empirical Study of the Reliability UNIX Utilities

    E-Print Network [OSTI]

    Miller, Barton P.

    An Empirical Study of the Reliability of UNIX Utilities Barton P. Miller bart@cs.wisc.edu Lars, such as the kernel and utility programs, are typically assumed to be reliable. In our recent experiments, we have been able to crash 25-33% of the utility programs on any version of UNIX that was tested. This report

  2. Hybrid Statistical Model Checking Technique for Reliable Safety Critical Systems

    E-Print Network [OSTI]

    @cs.kaist.ac.kr Abstract--Reliability of safety critical systems such as nuclear power plants and automobiles has become1 Hybrid Statistical Model Checking Technique for Reliable Safety Critical Systems Youngjoo Kim a significant issue to our society. As more computing systems are utilized in these safety critical systems

  3. 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

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

    SciTech Connect (OSTI)

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

    2008-02-01

    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.

  5. Joint Architecture Standard (JAS) Reliable Data Delivery Protocol (RDDP) specification.

    SciTech Connect (OSTI)

    Enderle, Justin Wayne; Daniels, James W.; Gardner, Michael T.; Eldridge, John M.; Hunt, Richard D.; Gallegos, Daniel E.

    2011-05-01

    The Joint Architecture Standard (JAS) program at Sandia National Laboratories requires the use of a reliable data delivery protocol over SpaceWire. The National Aeronautics and Space Administration at the Goddard Spaceflight Center in Greenbelt, Maryland, developed and specified a reliable protocol for its Geostationary Operational Environment Satellite known as GOES-R Reliable Data Delivery Protocol (GRDDP). The JAS program implemented and tested GRDDP and then suggested a number of modifications to the original specification to meet its program specific requirements. This document details the full RDDP specification as modified for JAS. The JAS Reliable Data Delivery Protocol uses the lower-level SpaceWire data link layer to provide reliable packet delivery services to one or more higher-level host application processes. This document specifies the functional requirements for JRDDP but does not specify the interfaces to the lower- or higher-level processes, which may be implementation-dependent.

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

    SciTech Connect (OSTI)

    Eto, Joseph

    2003-07-30

    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.

  7. Is This Cost Estimate Reliable?Is This Cost Estimate Reliable? -The Relationship between Homogeneity of Analogues

    E-Print Network [OSTI]

    Bae, Doo-Hwan

    Is This Cost Estimate Reliable?Is This Cost Estimate Reliable? - The Relationship between/4)( / ) Software cost estimation Definition · Task of predicting the cost required to complete a software projectproject Techniques for software cost estimation · Algorithmic estimationAlgorithmic estimation ­ Calculate

  8. Development of a reliable, miniaturized hydrogen safety sensor prototype

    SciTech Connect (OSTI)

    Sekhar, Praveen K; Brosha, Eric L; Rangachary, Mukundan; Garzon, Fernando H; Williamson, Todd L

    2010-01-01

    In this article, the development and long-term testing of a hydrogen safety sensor for vehicle and infrastructure applications is presented. The working device is demonstrated through application of commercial and reproducible manufacturing methods and rigorous life testing results guided by materials selection, and sensor design. Fabricated using Indium Tin Oxide (ITO) as the sensing electrode, Yttria-Stabilized Zirconia (YSZ) as an oxygen ion conducting solid electrolyte and Platinum (Pt) as a pseudo-counter electrode, the device was subjected to interference studies, temperature cycling, and long-testing routine. The sensor responded in real time to varying concentrations of H{sub 2} (1000 to 20,000 ppm) monitored under a humidified condition. Among the interference gases tested such as nitric oxide (NO), nitrogen dioxide (NO{sub 2}), ammonia (NH{sub 3}), carbon monoxide (CO), and propylene (C{sub 3}H{sub 6}), the sensor showed cross-sensitivity to C{sub 3}H{sub 6}. Analyzing the overall device performance over 4000 hrs of testing for 5000 ppm of H{sub 2}, (a) the sensitivity varied {+-}21% compared to response recorded at 0 hrs, and (c) the response rise time fluctuated between 3 to 46 s. The salient features of the H{sub 2} sensor prototype designed and co-developed by Los Alamos National Laboratory (LANL) are (a) stable three phase interface (electrode/electrolyte/gas) leading to reliable sensor operation, (b) low power consumption, (b) compactness to fit into critical areas of application, (c) simple operation, (d) fast response, (e) a direct voltage read-out circumventing the need for any additional conditioning circuitry, and (f) conducive to commercialization.

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

    SciTech Connect (OSTI)

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

    2014-10-01

    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.

  10. Reliable and unreliable dynamics in driven coupled oscillators

    E-Print Network [OSTI]

    Kevin K. Lin; Eric Shea-Brown; Lai-Sang Young

    2006-08-10

    This letter concerns the reliability of coupled oscillator networks in response to fluctuating inputs. Reliability means that (following a transient) an input elicits identical responses upon repeated presentations, regardless of the system's initial condition. Here, we analyze this property for two coupled oscillators, demonstrating that oscillator networks exhibit both reliable and unreliable dynamics for broad ranges of coupling strengths. We further argue that unreliable dynamics are characterized by strange attractors with random SRB measures, implying that though unreliable, the responses lie on low-dimensional sets. Finally, we show that 1:1 phase locking in the zero-input system corresponds to high susceptibility for unreliable responses. A geometric explanation is proposed.

  11. Performance and Reliability of Bonded Interfaces for High-Temperature Packaging (Presentation)

    SciTech Connect (OSTI)

    Devoto, D.

    2014-11-01

    The thermal performance and reliability of sintered-silver is being evaluated for power electronics packaging applications. This will be experimentally accomplished by the synthesis of large-area bonded interfaces between metalized substrates that will be subsequently subjected to thermal cycles. A finite element model of crack initiation and propagation in these bonded interfaces will allow for the interpretation of degradation rates by a crack-velocity (V)-stress intensity factor (K) analysis. The experiment is outlined, and the modeling approach is discussed.

  12. Washington DC Reliability Requirements and the Need to Operate Mirant's Potomac River Generation Station to Support Local Area Reliability.pdf

    Office of Environmental Management (EM)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann Jackson About1996HowFOAShowingFuel EfficiencyWashington , DC 20585 April 15, 2013

  13. Reliability Modeling and Evaluation in Aging Power Systems 

    E-Print Network [OSTI]

    Kim, Hag-Kwen

    2010-01-14

    Carlo simulation is introduced. Power Law Process is modeled as the failure rate function of aging components. Power system reliability analysis can be made at the generation capacity level where transmission constraints may be included. The simulation...

  14. 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 ...

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

    E-Print Network [OSTI]

    Kahn, E.

    2011-01-01

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

  16. Travel Time Reliability: Its Measurement and Prediction | ornl...

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

    Travel Time Reliability: Its Measurement and Prediction Apr 02 2014 10:00 AM - 11:00 AM George List, North Carolina State University, Raleigh, and Richard Margiotta, Cambridge...

  17. Transmission Reliability "Load as a Resource" Peer Review Materials...

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

    "Load as a Resource" Peer Review Materials Now Available Transmission Reliability "Load as a Resource" Peer Review Materials Now Available September 25, 2014 - 11:43am Addthis OE's...

  18. Multi-hazard Reliability Assessment of Offshore Wind Turbines 

    E-Print Network [OSTI]

    Mardfekri Rastehkenari, Maryam 1981-

    2012-12-04

    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...

  19. Energy and Reliability in Future NOC Interconnected CMPS 

    E-Print Network [OSTI]

    Kim, Hyungjun

    2013-08-01

    In this dissertation, I explore energy and reliability in future NoC (Network-on-Chip) interconnected CMPs (chip multiprocessors) as they have become a first-order constraint in future CMP design. In the first part, we ...

  20. Massachusetts Institute of Technology Reliable Secret Sharing With

    E-Print Network [OSTI]

    Marten van Dijk, Daihyun Lim, Srinivas Devadas 2004 Computation Structures Group Memo 475 The Stata Laboratory #12;#12;Reliable Secret Sharing With Physical Random Functions Marten van Dijk Daihyun Lim

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

    SciTech Connect (OSTI)

    Sheng, S.; Lantz, E.

    2013-08-01

    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.

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

    E-Print Network [OSTI]

    Devine, Paul (Paul S.)

    2006-01-01

    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 ...

  3. 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.

  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.

    2008-02-01

    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. Reliability-based Design of Offshore Mooring Systems 

    E-Print Network [OSTI]

    Mousavi, Mir Emad

    2013-02-05

    This study proposes new methods for the reliability-based design of structural systems, with emphasis on offshore mooring systems. After a brief introduction to the mooring systems, two main objectives are discussed in this dissertation. The first...

  6. 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 ...

  7. The reliability of a dialogue structure coding scheme. 

    E-Print Network [OSTI]

    Carletta, Jean; Isard, Amy; Isard, Stephen; Kowtko, Jacqueline C; Doherty-Sneddon, Gwyneth; Anderson, Anne H

    1997-01-01

    This papers describes the reliability of a dialogue structure coding scheme which is based on utterance function, game structure, and higher level transaction function, and which has been applied to a corpus of spontaneous ...

  8. 2012 CERTS Transmission Reliability R&D Internal Program Review...

    Office of Environmental Management (EM)

    Reliability R&D Internal Program Review June 12-13, 2012 LBNL Project Office 901 D St., SW Washington DC Nancy Lewis' cell: 510.918.3155 Revised Agenda: June 5, 2012 June 12, Day...

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

    SciTech Connect (OSTI)

    Pierce, B.F.

    1986-07-01

    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.

  10. Reliability assessment of electrical power systems using genetic algorithms 

    E-Print Network [OSTI]

    Samaan, Nader Amin Aziz

    2004-11-15

    The first part of this dissertation presents an innovative method for the assessment of generation system reliability. In this method, genetic algorithm (GA) is used as a search tool to truncate the probability state space ...

  11. Unit 51 - GIS Application Areas

    E-Print Network [OSTI]

    Unit 51, CC in GIS; Cowen, David; Ferguson, Warren

    1990-01-01

    51 - GIS APPLICATION AREAS UNIT 51 - GIS APPLICATION AREAS1990 Page 1 Unit 51 - GIS Application Areas Computers inyour students. UNIT 51 - GIS APPLICATION AREAS Compiled with

  12. 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

    2010-01-01

    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.

  13. 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

  14. On-clip high frequency reliability and failure test structures

    DOE Patents [OSTI]

    Snyder, Eric S. (Albuquerque, NM); Campbell, David V. (Albuquerque, NM)

    1997-01-01

    Self-stressing test structures for realistic high frequency reliability characterizations. An on-chip high frequency oscillator, controlled by DC signals from off-chip, provides a range of high frequency pulses to test structures. The test structures provide information with regard to a variety of reliability failure mechanisms, including hot-carriers, electromigration, and oxide breakdown. The system is normally integrated at the wafer level to predict the failure mechanisms of the production integrated circuits on the same wafer.

  15. A Systematic and Comprehensive Tool for Software Reliability Modeling and Measurement

    E-Print Network [OSTI]

    Lyu, Michael R.

    reliability. This trend makes the estimation of software reliability more and more crit­ ical to most large­scale projects in their reliability engineering aspects. Traditionally, software reliability modeling is a setA Systematic and Comprehensive Tool for Software Reliability Modeling and Measurement Michael R

  16. Final Report for the Virtual Reliability Realization System LDRD

    SciTech Connect (OSTI)

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

    2000-12-01

    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.

  17. ELECTRICAL SUBSTATION RELIABILITY EVALUATION WITH EMPHASIS ON EVOLVING INTERDEPENDENCE ON COMMUNICATION INFRASTRUCTURE.

    SciTech Connect (OSTI)

    AZARM,M.A.BARI,R.A.MUSICKI,Z.

    2004-01-15

    The objective of this study is to develop a methodology for a probabilistic assessment of the reliability and security of electrical energy distribution networks. This includes consideration of the future grid system, which will rely heavily on the existing digitally based communication infrastructure for monitoring and protection. Another important objective of this study is to provide information and insights from this research to Consolidated Edison Company (Con Edison) that could be useful in the design of the new network segment to be installed in the area of the World Trade Center in lower Manhattan. Our method is microscopic in nature and relies heavily on the specific design of the portion of the grid being analyzed. It extensively models the types of faults that a grid could potentially experience, the response of the grid, and the specific design of the protection schemes. We demonstrate that the existing technology can be extended and applied to the electrical grid and to the supporting communication network. A small subsection of a hypothetical grid based on the existing New York City electrical grid system of Con Edison is used to demonstrate the methods. Sensitivity studies show that in the current design the frequency for the loss of the main station is sensitive to the communication network reliability. The reliability of the communication network could become a more important contributor to the electrical grid reliability as the utilization of the communication network significantly increases in the near future to support ''smart'' transmission and/or distributed generation. The identification of potential failure modes and their likelihood can support decisions on potential modifications to the network including hardware, monitoring instrumentation, and protection systems.

  18. DOE Designates Southwest Area and Mid-Atlantic Area National...

    Energy Savers [EERE]

    Corridors October 2, 2007 - 11:12am Addthis WASHINGTON, DC - U.S. Department of Energy (DOE) Assistant Secretary for Electricity Delivery and Energy Reliability Kevin M....

  19. GLAST Large Area Telescope Multiwavelength Planning

    E-Print Network [OSTI]

    O. Reimer; P. F. Michelson; R. A. Cameron; S. W. Digel; D. J. Thompson; K. S. Wood

    2006-11-21

    Gamma-ray astrophysics depends in many ways on multiwavelength studies. The Gamma-ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT) Collaboration has started multiwavelength planning well before the scheduled 2007 launch of the observatory. Some of the high-priority multiwavelength needs include: (1) availability of contemporaneous radio and X-ray timing of pulsars; (2) expansion of blazar catalogs, including redshift measurements; (3) improved observations of molecular clouds, especially at high galactic latitudes; (4) simultaneous broad-band blazar monitoring; (5) characterization of gamma-ray transients, including gamma ray bursts; (6) radio, optical, X-ray and TeV counterpart searches for reliable and effective sources identification and characterization. Several of these activities are needed to be in place before launch.

  20. Modular Operational Test Plans for Inferences on Software Reliability Based on a Markov Model

    E-Print Network [OSTI]

    Mazumdar, Mainak

    Modular Operational Test Plans for Inferences on Software Reliability Based on a Markov Model. Keywords: Software reliability; Modular Operational Tests; Sample Size Determination; Mathematical Programming #12;Modular Operational Test Plans for Inferences on Software Reliability Based on a Markov Model

  1. 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

  2. Sacramento Area Voltage Support Final Environmental Impact Statement

    SciTech Connect (OSTI)

    N /A

    2003-09-19

    The Western Area Power Administration's Central Valley Project transmission system forms an integral part of the interconnected Sacramento area transmission grid. Western is contractually responsible to oversee that the system is operated in accordance with strict reliability standards. Growth in the greater Sacramento, California area and power imported from generation outside the region, have increased the demand on the interconnected electric transmission system, leading to transmission system overloads and reducing the reliability and security of the area power system. Western has prepared this Sacramento Area Voltage Support (SVS) Draft Environmental Impact Statement (EIS) in compliance with Federal laws, regulations and guidelines, principally the National Environmental Policy Act (NEPA). This Draft EIS evaluates the potential environmental effects of physical improvements to the area's power system. Enhancements are needed to improve system reliability and provide voltage support for the Sacramento area. The results of public scoping meetings, workshops, meetings with agencies, and earlier studies by Western and area utilities helped to develop a range of alternatives for analysis. The Proposed Action involves: (1) Constructing a new double-circuit, 230-kV transmission line paralleling the existing double-circuit, 230-kV line from the O'Banion Substation to the Elverta Substation; (2) Realigning a portion of the existing Cottonwood-Roseville single-circuit, 230-kV transmission line north of Elverta Substation; and (3) Reconductoring the existing double-circuit, 230-kV transmission line from the Elverta Substation to the Tracy Substation. Public Hearings on the Draft EIS will be held between December 9-12, 2002. Comments on this Draft EIS are encouraged and should be sent to Ms. Loreen McMahon (above). Comments must be received by December 30, 2002.

  3. When Both Transmitting and Receiving Energies Matter: An Application of Network Coding in Wireless Body Area Networks

    E-Print Network [OSTI]

    Shi, Xiaomeng

    A network coding scheme for practical implementations of wireless body area networks is presented, with the objective of providing reliability under low-energy constraints. We propose a simple network layer protocol for ...

  4. Site Monitoring Area Maps

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

    and roads The spatial location and boundaries for each Site shown on the Site Monitoring Area maps originate from activities conducted under the Compliance Order on Consent with...

  5. 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.

    2000-01-01

    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.

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

    E-Print Network [OSTI]

    McCarthy, Ryan

    2004-01-01

    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

  7. Use of Frequency Response Metrics to Assess the Planning and Operating Requirements for Reliable Integration of Variable Renewable Generation

    SciTech Connect (OSTI)

    Eto, Joseph H.; Undrill, John; Mackin, Peter; Daschmans, Ron; Williams, Ben; Haney, Brian; Hunt, Randall; Ellis, Jeff; Illian, Howard; Martinez, Carlos; O'Malley, Mark; Coughlin, Katie; LaCommare, Kristina Hamachi

    2010-12-20

    An interconnected electric power system is a complex system that must be operated within a safe frequency range in order to reliably maintain the instantaneous balance between generation and load. This is accomplished by ensuring that adequate resources are available to respond to expected and unexpected imbalances and restoring frequency to its scheduled value in order to ensure uninterrupted electric service to customers. Electrical systems must be flexible enough to reliably operate under a variety of"change" scenarios. System planners and operators must understand how other parts of the system change in response to the initial change, and need tools to manage such changes to ensure reliable operation within the scheduled frequency range. This report presents a systematic approach to identifying metrics that are useful for operating and planning a reliable system with increased amounts of variable renewable generation which builds on existing industry practices for frequency control after unexpected loss of a large amount of generation. The report introduces a set of metrics or tools for measuring the adequacy of frequency response within an interconnection. Based on the concept of the frequency nadir, these metrics take advantage of new information gathering and processing capabilities that system operators are developing for wide-area situational awareness. Primary frequency response is the leading metric that will be used by this report to assess the adequacy of primary frequency control reserves necessary to ensure reliable operation. It measures what is needed to arrest frequency decline (i.e., to establish frequency nadir) at a frequency higher than the highest set point for under-frequency load shedding within an interconnection. These metrics can be used to guide the reliable operation of an interconnection under changing circumstances.

  8. High-reliability gas-turbine combined-cycle development program: Phase II, Volume 3. Final report

    SciTech Connect (OSTI)

    Hecht, K.G.; Sanderson, R.A.; Smith, M.J.

    1982-01-01

    This three-volume report presents the results of Phase II of the multiphase EPRI-sponsored High-Reliability Gas Turbine Combined-Cycle Development Program whose goal is to achieve a highly reliable gas turbine combined-cycle power plant, available by the mid-1980s, which would be an economically attractive baseload generation alternative for the electric utility industry. The Phase II program objective was to prepare the preliminary design of this power plant. The power plant was addressed in three areas: (1) the gas turbine, (2) the gas turbine ancillaries, and (3) the balance of plant including the steam turbine generator. To achieve the program goals, a gas turbine was incorporated which combined proven reliability characteristics with improved performance features. This gas turbine, designated the V84.3, is the result of a cooperative effort between Kraftwerk Union AG and United Technologies Corporation. Gas turbines of similar design operating in Europe under baseload conditions have demonstrated mean time between failures in excess of 40,000. The reliability characteristics of the gas turbine ancillaries and balance-of-plant equipment were improved through system simplification and component redundancy and by selection of component with inherent high reliability. A digital control system was included with logic, communications, sensor redundancy, and manual backup. An independent condition monitoring and diagnostic system was also included. Program results provide the preliminary design of a gas turbine combined-cycle baseload power plant. This power plant has a predicted mean time between failure of nearly twice the 3000-h EPRI goal. The cost of added reliability features is offset by improved performance, which results in a comparable specific cost and an 8% lower cost of electricty compared to present market offerings.

  9. Geothermal br Resource br Area Geothermal br Resource br Area...

    Open Energy Info (EERE)

    Area Central Nevada Seismic Zone Pull Apart in Strike Slip Fault Zone Ordovician shale quartzite MW K Blue Mountain Geothermal Area Blue Mountain Geothermal Area Northwest...

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

    SciTech Connect (OSTI)

    Swiler, Laura Painton; Mandelli, Diego; Rabiti, Cristian; Alfonsi, Andrea

    2013-09-01

    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).

  11. 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

    2007-01-01

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

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

    SciTech Connect (OSTI)

    Ellingwood, B.; Bhattacharya, B.; Zheng, R.

    1996-11-01

    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.

  13. Human Reliability Analysis for Digital Human-Machine Interfaces

    SciTech Connect (OSTI)

    Ronald L. Boring

    2014-06-01

    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.

  14. Product acceptance environmental and destructive testing for reliability.

    SciTech Connect (OSTI)

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

    2007-08-01

    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.

  15. Technical information report: Plasma melter operation, reliability, and maintenance analysis

    SciTech Connect (OSTI)

    Hendrickson, D.W. [ed.

    1995-03-14

    This document provides a technical report of operability, reliability, and maintenance of a plasma melter for low-level waste vitrification, in support of the Hanford Tank Waste Remediation System (TWRS) Low-Level Waste (LLW) Vitrification Program. A process description is provided that minimizes maintenance and downtime and includes material and energy balances, equipment sizes and arrangement, startup/operation/maintence/shutdown cycle descriptions, and basis for scale-up to a 200 metric ton/day production facility. Operational requirements are provided including utilities, feeds, labor, and maintenance. Equipment reliability estimates and maintenance requirements are provided which includes a list of failure modes, responses, and consequences.

  16. Neutron Science Research Areas | ORNL

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

    Home | Science & Discovery | Neutron Science | Research Areas SHARE Research Areas Neutron scattering research at ORNL covers four broad research areas: biology and soft...

  17. 1 INTRODUCTION Rational and reliable seismic design theories and

    E-Print Network [OSTI]

    Spencer Jr., Billie F.

    to the seismic design of dams to be constructed and the assessment of earthquake safety of existing dams. Many is not almost considered in the seismic design of dams to be constructed and the assessment of earthquake safety1 INTRODUCTION Rational and reliable seismic design theories and analytical methods are substantial

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

    SciTech Connect (OSTI)

    Buche, D. L.

    2008-07-01

    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.

  19. Tools and Techniques for Ensuring Automotive EMC Performance and Reliability

    E-Print Network [OSTI]

    Stuart, Steven J.

    V-Model 4 Concept Design Design Requirements Detailed Design and Modeling Prototype System Validation System Integration Component Verification #12;AUTOSAR 5 APPLICATION SOFTWARE HARDWARE AUTOSAR powerful More efficient Far more reliable. Cars with intelligently designed electronic systems will be: 9

  20. The Ambient Computational Environments Architecture for Reliable, Secure,

    E-Print Network [OSTI]

    Kansas, University of

    challenge. The ACE - Ambient Computational Environments - architecture aims at high- scale and seamlessThe Ambient Computational Environments Architecture for Reliable, Secure, and Pervasive Computing The University of Kansas #12;Abstract During the past few years, the technology world has become more and more

  1. User-Level Reliability Monitoring in Urban Personal

    E-Print Network [OSTI]

    Calgary, University of

    TAKALA, Senior Member, IEEE Tampere University of Technology Finland Monitoring the reliability University of Technology, Tampere, Finland. 0018-9251/07/$25.00 c° 2007 IEEE I. INTRODUCTION To ensure a user University of Technology Finland ANDREAS WIESER G ´ERARD LACHAPELLE, Member, IEEE University of Calgary JARMO

  2. A TECHNIQUE FOR TESTING HIGHLY RELIABLE REAL-TIME SOFTWARE

    E-Print Network [OSTI]

    Bieman, James M.

    Task Plan ® A TECHNIQUE FOR TESTING HIGHLY RELIABLE REAL-TIME SOFTWARE Slide Presentation Biography that uses executable specifications based on Annotated Ada (Anna) for software testing in hard real process and does not interfere with the software under test. 1.0 INTRODUCTION Automating the verification

  3. SOFTWARE TESTING, VERIFICATION AND RELIABILITY Softw. Test. Verif. Reliab. (2014)

    E-Print Network [OSTI]

    2014-01-01

    SOFTWARE TESTING, VERIFICATION AND RELIABILITY Softw. Test. Verif. Reliab. (2014) Published online. INTRODUCTION As software evolves, engineers regression test it to validate new features and detect whether new in Wiley Online Library (wileyonlinelibrary.com). DOI: 10.1002/stvr.1562 Directed test suite augmentation

  4. On some statistical aspects of software testing and reliability

    E-Print Network [OSTI]

    Coolen, Frank

    On some statistical aspects of software testing and reliability Frank P.A. Coolen Abstract This article discusses the author's views on possible contributions statistics can make to software testing, the mes- sage is that statistical methods cannot provide proper support for software testing or provide

  5. LMS: A Router Assisted Scheme for Reliable Multicast Christos Papadopoulos

    E-Print Network [OSTI]

    Papadopoulos, Christos

    1 LMS: A Router Assisted Scheme for Reliable Multicast Christos Papadopoulos University of Southern­weight Multicast Ser­ vices (LMS), which enhance the existing multicast model with simple forwarding services that do not require transport level actions. Using LMS, routers tag and steer transport­level control

  6. Reliable data collection in highly disconnected environments using mobile phones

    E-Print Network [OSTI]

    Parikh, Tapan S.

    high-impact applications for these environments. Many of the applications built with CAM have relied information and get the collected data backed up on reliable media. We propose extending CAM's networking volunteers to resurvey - a waste of both time and resources. There was a clear need to move the data

  7. Action potentials reliably invade axonal arbors of rat neocortical neurons

    E-Print Network [OSTI]

    Tank, David

    Action potentials reliably invade axonal arbors of rat neocortical neurons Charles L. Cox* , Winfried Denk§ , David W. Tank§ , and Karel Svoboda*¶ *Howard Hughes Medical Institute, Cold Spring Harbor, Murray Hill, NJ 07974 Communicated by James D. Watson, Cold Spring Harbor Laboratory, Cold Spring Harbor

  8. SDRT: A Reliable Data Transport Protocol for Underwater Sensor Networks

    E-Print Network [OSTI]

    Cui, Jun-Hong

    activities such as scientific exploration and commercial exploitation, underwater sensor networks empower us networks, for mission critical applications, reliable data transport is demanded in under- water sensor channels is limited and depends on both transmission range and frequency [8], [24], [5], [6]. According

  9. Towards Reliable 5Gbps Wave-pipelined and

    E-Print Network [OSTI]

    Lemieux, Guy

    Towards Reliable 5Gbps Wave-pipelined and 3Gbps Surfing Interconnect in 65nm FPGAs Paul Teehan Guy source Data destination Input switches Output switches High-speed pipelined wire Regular interconnect-speed pipelined wire #12;FPGA'09 4 of 27 Key points Base design Wave pipelining, source synchronous timing

  10. 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

  11. EE 850.3 (3L) Reliability Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    EE 850.3 (3L) Reliability Engineering Department of Electrical and Computer Engineering Fall 2014 Karki, Ph.D., P.Eng. Associate Professor, Department of Electrical and Computer Engineering Office: Room 3B30, Engineering Building Phone: (306) 966-5384 Email: rajesh.karki@usask.ca Lectures: Monday

  12. reliable, efficient, ultra-clean Fuel Cell Power Plant Experience

    E-Print Network [OSTI]

    reliable, efficient, ultra-clean Fuel Cell Power Plant Experience Naval Applications US Department Shore Capacity - Low Profile, Easy Siting Connects to existing electricity and fuel infrastructure Cell Stack and operated with high sulfur naval logistic fuel (JP-5 jet fuel) · Over 1000 Hours of Fuel

  13. IDENTIFICATION OF RELIABLE PREDICTOR MODELS FOR UNKNOWN SYSTEMS: A

    E-Print Network [OSTI]

    Campi, Marco

    IDENTIFICATION OF RELIABLE PREDICTOR MODELS FOR UNKNOWN SYSTEMS: A DATA-CONSISTENCY APPROACH BASED mechanism ­ DGM), a selected family of models, with which we want to describe the observed data (the data, that is a statement of probability that the computed model will be consistent with future unknown data. Keywords

  14. SPEAR fuel reliability code system. General description. [PWR; BWR

    SciTech Connect (OSTI)

    Christensen, R.

    1980-03-01

    A general description is presented for the SPEAR fuel reliability code system. Included is a discussion of the methodology employed and the structure of the code system, as well as discussion of the major components: the data preparation routines, the mechanistic fuel performance model, the mechanistic cladding failure model, and the statistical failure model.

  15. 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.

    1999-01-20

    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.

  16. Saving power without compromising disk drive reliability Xenia Mountrouidou

    E-Print Network [OSTI]

    Butt, Ali R.

    Saving power without compromising disk drive reliability Xenia Mountrouidou College of William intervals for power savings within strict constraints: first, it is imperative to contain the delays in service of IO requests that occur during power savings since the time to bring up the disk

  17. WIND POWER SIMULATION MODEL FOR RELIABILITY EVALUATION Rajesh Karki

    E-Print Network [OSTI]

    Saskatchewan, University of

    WIND POWER SIMULATION MODEL FOR RELIABILITY EVALUATION Rajesh Karki Rajesh.Karki@usask.ca Po Hu poh The rapidly increasing contribution of wind power to electric power generation around the world has motivated a need to develop more widely applicable methodologies for evaluating the actual benefits of adding wind

  18. 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

  19. Reliability Tradeoffs in Personal Storage Systems John A. Chandy

    E-Print Network [OSTI]

    Chandy, John A.

    Reliability Tradeoffs in Personal Storage Systems John A. Chandy john.chandy@uconn.edu Sumit processes. These methods are most useful in storage systems where complete data protection or availability Disk arrays have long been used to improve the performance of storage systems [5, 10]. The parallelism

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

    E-Print Network [OSTI]

    Ntaimo, Lewis

    conditions. In-situ sensors installed at wind turbines produce useful information about the physical guidelines that reduces the repair costs and increases the marketability of wind energy generation. #12;IEEEIEEE TRANSACTIONS ON RELIABILITY 1 Optimal Maintenance Strategies for Wind Turbine Systems Under

  1. 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

  2. Reliable and Scalable Communication for the Power Grid

    E-Print Network [OSTI]

    Mueller, Frank

    Reliable and Scalable Communication for the Power Grid Christopher Zimmer, Frank Mueller Abstract Future smart power grids require constant data availability for actuation of control decisions. The job topologies of smart devices that enable multi-route discovery in an intelligent power grid. This is ac

  3. Validity and Reliability of Web Accessibility Guidelines Giorgio Brajnik

    E-Print Network [OSTI]

    Brajnik, Giorgio

    checkpoints taken from WCAG 1.0 and WCAG 2.0. The experiment employed 35 young web developers with some the viewpoint of their validity and reliability. WCAG 2.0 explicitly claim that they are based on "testable knowledge on web accessibility. Although this is a small-scale experiment, unlikely to provide definite

  4. Hierarchical Reliable Multicast: performance analysis and placement of proxies

    E-Print Network [OSTI]

    Tobagi, Fouad

    the term Hierarchical Reliable Multicast (HRM). For each subgroup, there is a designated node, the proxy and its loss characteristics. Furthermore, the performance of the HRM approach, in particular, strongly model the HRM problem, then define and compute appropriate performance metrics and finally give insights

  5. 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

    2013-09-03

    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.

  6. Using data fusion for scoring reliability of proteinprotein interactions

    E-Print Network [OSTI]

    Wong, Limsoon

    Using data fusion for scoring reliability of protein­protein interactions Alireza Vazifedoost@ut.ac.ir **Rahgozar@ut.ac.ir moshiri@ut.ac.ir sadeghi@nigeb.ac.ir § § hnchua@i2r.a-star.edu.sg ¶¶ skng@i2r.a-star data fusion to model potential interactions between the multiple information sources. Using data fusion

  7. 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

  8. System Reliability Analysis of an Nversion Programming Application

    E-Print Network [OSTI]

    Lyu, Michael R.

    reliability anal­ ysis of a system designed to tolerate both hardware and software faults. The system being hardware. The analysis of the system considers independent soft­ ware faults, related software faults, transient hardware faults, permanent hardware faults, and imperfect cov­ erage. The overall model

  9. Reliable Cellular Automata with SelfOrganization Peter Gacs 1

    E-Print Network [OSTI]

    Gacs, Peter

    Reliable Cellular Automata with Self­Organization Peter Gâ??acs 1 Computer Science Department Boston University Boston, MA 02215 gacs@bu.edu Abstract In a noisy cellular automaton, even if it is infinite solution in 2 dimensions has been applied to a simple 3­dimensional fault­tolerant cellular automaton

  10. RELIABLE CELLULAR AUTOMATA WITH SELF-ORGANIZATION PETER G ACS

    E-Print Network [OSTI]

    Gacs, Peter

    RELIABLE CELLULAR AUTOMATA WITH SELF-ORGANIZATION PETER G ´ACS ABSTRACT. In a probabilistic cellular automaton in which all local transitions have positive probability, the problem of keeping a bit-tolerant cellular automaton. This technique does not help much to solve the following problems: remembering a bit

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

    SciTech Connect (OSTI)

    Not Available

    2013-07-01

    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.

  12. What makes information valuable: signal reliability and environmental uncertainty

    E-Print Network [OSTI]

    Stephens, David W.

    uncertainty in animal signal use. We de- veloped a simple model that predicted when animals should switch The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved. Many aspects. An example of a reliable signal is the carotenoid-based plumage colora- tion in male house finches

  13. Reliability and Throughput in Future Automotive Communication Networks

    E-Print Network [OSTI]

    Rajkumar, Ragunathan "Raj"

    Reliability and Throughput in Future Automotive Communication Networks John Liu, Timothy TaltyStar. This action created a new industry called automotive telematics, helping to save lives and providing, the automotive telematics industry has experienced a healthy growth in North America. During the current economic

  14. Accident Sequence Evaluation Program: Human reliability analysis procedure

    SciTech Connect (OSTI)

    Swain, A.D.

    1987-02-01

    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.

  15. Modeling Stochastic Correlated Failures and their Effects on Network Reliability

    E-Print Network [OSTI]

    Hayat, Majeed M.

    in this field have used this concept to generate geographically correlated failures (e.g. [1] and [2]). SomeModeling Stochastic Correlated Failures and their Effects on Network Reliability Mahshid Rahnamay--The physical infrastructure of communication net- works is vulnerable to spatially correlated failures arising

  16. Reliable Contracts for Unreliable Half-Duplex Communications

    E-Print Network [OSTI]

    Doyen, Laurent

    indicate useful criteria for the design of WSDL. We moreover establish a polynomial-time complexity explains the criteria proposed by Stengel and Bultan for Sing# contracts to be reliable, and possibly. The primary goal of session types is to ensure type-safety, e.g. that communications over a typed channel

  17. Geographic Area Month

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    Fuels by PAD District and State (Cents per Gallon Excluding Taxes) - Continued Geographic Area Month No. 1 Distillate No. 2 Distillate a No. 4 Fuel b Sales to End Users Sales for...

  18. Decontamination & decommissioning focus area

    SciTech Connect (OSTI)

    1996-08-01

    In January 1994, the US Department of Energy Office of Environmental Management (DOE EM) formally introduced its new approach to managing DOE`s environmental research and technology development activities. The goal of the new approach is to conduct research and development in critical areas of interest to DOE, utilizing the best talent in the Department and in the national science community. To facilitate this solutions-oriented approach, the Office of Science and Technology (EM-50, formerly the Office of Technology Development) formed five Focus AReas to stimulate the required basic research, development, and demonstration efforts to seek new, innovative cleanup methods. In February 1995, EM-50 selected the DOE Morgantown Energy Technology Center (METC) to lead implementation of one of these Focus Areas: the Decontamination and Decommissioning (D & D) Focus Area.

  19. 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.

    2013-06-01

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

  20. Automated Modeling of Dynamic Reliability Block Diagrams Using Colored Petri Nets

    E-Print Network [OSTI]

    Xu, Haiping

    solution to automated verification of DRBD models. Index Terms--System reliability, reliability block \\ Abstract--Computer system reliability is conventionally modeled and analyzed using techniques such as fault), defines a framework for modeling dynamic reliability behavior of computer-based systems. However

  1. Added Value of Reliability to a Microgrid: Simulations of Three California Buildings

    E-Print Network [OSTI]

    Marnay, Chris

    2009-01-01

    distributed generation, real options analysis of renewable energyDelivery and Energy Reliability, Renewable and Distributed

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

    SciTech Connect (OSTI)

    Devoto, D.

    2013-07-01

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

  3. 300 Area Disturbance Report

    SciTech Connect (OSTI)

    LL Hale; MK Wright; NA Cadoret

    1999-01-07

    The objective of this study was to define areas of previous disturbance in the 300 Area of the U.S. Department of Energy (DOE) Hanford Site to eliminate these areas from the cultural resource review process, reduce cultural resource monitoring costs, and allow cultural resource specialists to focus on areas where subsurface disturbance is minimal or nonexistent. Research into available sources suggests that impacts from excavations have been significant wherever the following construction activities have occurred: building basements and pits, waste ponds, burial grounds, trenches, installation of subsurface pipelines, power poles, water hydrants, and well construction. Beyond the areas just mentioned, substrates in the' 300 Area consist of a complex, multidimen- sional mosaic composed of undisturbed stratigraphy, backfill, and disturbed sediments; Four Geographic Information System (GIS) maps were created to display known areas of disturbance in the 300 Area. These maps contain information gleaned from a variety of sources, but the primary sources include the Hanford GIS database system, engineer drawings, and historic maps. In addition to these maps, several assumptions can be made about areas of disturbance in the 300 Area as a result of this study: o o Buried pipelines are not always located where they are mapped. As a result, cultural resource monitors or specialists should not depend on maps depicting subsurface pipelines for accurate locations of previous disturbance. Temporary roads built in the early 1940s were placed on layers of sand and gravel 8 to 12 in. thick. Given this information, it is likely that substrates beneath these early roads are only minimally disturbed. Building foundations ranged from concrete slabs no more than 6 to 8 in. thick to deeply excavated pits and basements. Buildings constructed with slab foundations are more numerous than may be expected, and minimally disturbed substrates may be expected in these locations. Historic black and white photographs provide a partial record of some excavations, including trenches, building basements, and material lay-down yards. Estimates of excavation depth and width can be made, but these estimates are not accurate enough to pinpoint the exact location where the disturbedhmdisturbed interface is located (e.g., camera angles were such that depths and/or widths of excavations could not be accurately determined or estimated). In spite of these limitations, these photographs provide essential information. Aerial and historic low-level photographs have captured what appears to be backfill throughout much of the eastern portion of the 300 Area-near the Columbia River shoreline. This layer of fill has likely afforded some protection for the natural landscape buried beneath the fill. This assumption fits nicely with the intermittent and inadvertent discoveries of hearths and stone tools documented through the years in this part of the 300 Area. Conversely, leveling of sand dunes appears to be substantial in the northwestern portion of the 300 Area during the early stages of development. o Project files and engineer drawings do not contain information on any impromptu but necessary adjustments made on the ground during project implementation-after the design phase. Further, many projects are planned and mapped but never implemented-this information is also not often placed in project files. Specific recommendations for a 300 Area cultural resource monitoring strategy are contained in the final section of this document. In general, it is recommended that monitoring continue for all projects located within 400 m of the Columbia River. The 400-m zone is culturally sensitive and likely retains some of the most intact buried substrates in the 300 Area.

  4. IEEE TRANSACTIONS ON RELIABILITY, VOL. 49, NO. 1, MARCH 2000 37 Failure Correlation in Software Reliability Models

    E-Print Network [OSTI]

    Goseva-Popstojanova, Katerina

    property of the developed Markov renewal modeling approach is its flexibility. It allows con- struction the analysis either on Markov chain theory or on renewal process theory. Thus, our modeling approach Reliability Models Katerina Goseva-Popstojanova, Member, IEEE, and Kishor S. Trivedi, Fellow, IEEE Abstract

  5. Load As A Reliability Resource in the Restructured Electricity Market

    SciTech Connect (OSTI)

    Kueck, J.D.

    2002-06-10

    Recent electricity price spikes are painful reminders of the value that meaningful demand-side responses could bring to the restructuring US electricity system. Review of the aggregate offers made by suppliers confirms that even a modest increase in demand elasticity could dramatically reduce these extremes in price volatility. There is a strong need for dramatically increased customer participation in these markets to enhance system reliability and reduce price volatility. Indeed, allowing customers to manage their loads in response to system conditions might be thought of as the ultimate reliability resource. Most would agree that meaningful demand-side responses to price are the hallmark of a well-functioning competitive market [1]. Yet, in today's markets for electricity, little or no such response is evident. The reason is simple: customers currently do not experience directly the time-varying costs of their consumption decisions. Consequently, they have no incentive to modify these decisions in ways that might enhance system reliability or improve the efficiency of the markets in which electricity is traded. Increased customer participation is a necessary step in the evolution toward more efficient markets for electricity and ancillary services. This scoping report provides a three-part assessment of the current status of efforts to enhance the ability of customer's load to participate in competitive markets with a specific focus on the role of customer loads in enhancing electricity system reliability. First, this report considers the definitions of electricity-reliability-enhancing ancillary services (Section 2) and a preliminary assessment of the ability of customer's loads to provide these services. Second, is a review a variety of programs in which load has been called on as a system reliability resource (Section 3). These experiences, drawn from both past and current utility and ISO programs, focus on programs triggered by system condition (e.g., forecast reserves fall below a threshold), rather than those triggered by price (e.g., real-time prices). Third, the report examines the status of the underlying metering, communication, and control technologies required to enable customer loads to participate in competitive electricity markets (Section 4). Following the three-part assessment, we offer preliminary thoughts on directions for future research (Section 5).

  6. HUMAN RELIABILITY ANALYSIS FOR COMPUTERIZED PROCEDURES, PART TWO: APPLICABILITY OF CURRENT METHODS

    SciTech Connect (OSTI)

    Ronald L. Boring; David I. Gertman

    2012-10-01

    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 U.S. nuclear power plant has implemented CPs in its main control room. 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 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.

  7. CONSIDERATIONS FOR THE TREATMENT OF COMPUTERIZED PROCEDURES IN HUMAN RELIABILITY ANALYSIS

    SciTech Connect (OSTI)

    Ronald L. Boring; David I. Gertman

    2012-07-01

    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. 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 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.

  8. Modeling the reliability and maintenance costs of wind turbines using Weibull analysis

    SciTech Connect (OSTI)

    Vachon, W.A. [W.A. Vachon & Associates, Inc., Manchester, MA (United States)

    1996-12-31

    A general description is provided of the basic mathematics and use of Weibull statistical models for modeling component failures and maintenance costs as a function of time. The applicability of the model to wind turbine components and subsystems is discussed with illustrative examples of typical component reliabilities drawn from actual field experiences. Example results indicate the dominant role of key subsystems based on a combination of their failure frequency and repair/replacement costs. The value of the model is discussed as a means of defining (1) maintenance practices, (2) areas in which to focus product improvements, (3) spare parts inventory, and (4) long-term trends in maintenance costs as an important element in project cash flow projections used by developers, investors, and lenders. 6 refs., 8 figs., 3 tabs.

  9. OLED area illumination source

    DOE Patents [OSTI]

    Foust, Donald Franklin (Scotia, NY); Duggal, Anil Raj (Niskayuna, NY); Shiang, Joseph John (Niskayuna, NY); Nealon, William Francis (Gloversville, NY); Bortscheller, Jacob Charles (Clifton Park, NY)

    2008-03-25

    The present invention relates to an area illumination light source comprising a plurality of individual OLED panels. The individual OLED panels are configured in a physically modular fashion. Each OLED panel comprising a plurality of OLED devices. Each OLED panel comprises a first electrode and a second electrode such that the power being supplied to each individual OLED panel may be varied independently. A power supply unit capable of delivering varying levels of voltage simultaneously to the first and second electrodes of each of the individual OLED panels is also provided. The area illumination light source also comprises a mount within which the OLED panels are arrayed.

  10. Integrated approach to economical, reliable, safe nuclear power production

    SciTech Connect (OSTI)

    Not Available

    1982-06-01

    An Integrated Approach to Economical, Reliable, Safe Nuclear Power Production is the latest evolution of a concept which originated with the Defense-in-Depth philosophy of the nuclear industry. As Defense-in-Depth provided a framework for viewing physical barriers and equipment redundancy, the Integrated Approach gives a framework for viewing nuclear power production in terms of functions and institutions. In the Integrated Approach, four plant Goals are defined (Normal Operation, Core and Plant Protection, Containment Integrity and Emergency Preparedness) with the attendant Functional and Institutional Classifications that support them. The Integrated Approach provides a systematic perspective that combines the economic objective of reliable power production with the safety objective of consistent, controlled plant operation.

  11. Reliability estimates for selected sensors in fusion applications

    SciTech Connect (OSTI)

    Cadwallader, L.C.

    1996-09-01

    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.

  12. Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR): Programmer's guide

    SciTech Connect (OSTI)

    Call, O. J.; Jacobson, J. A.

    1988-09-01

    The Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR) is an automated data base management system for processing and storing human error probability and hardware component failure data. The NUCLARR system software resides on an IBM (or compatible) personal micro-computer and can be used to furnish data inputs for both human and hardware reliability analysis in support of a variety of risk assessment activities. The NUCLARR system is documented in a five-volume series of reports. Volume 2 of this series is the Programmer's Guide for maintaining the NUCLARR system software. This Programmer's Guide provides, for the software engineer, an orientation to the software elements involved, discusses maintenance methods, and presents useful aids and examples. 4 refs., 75 figs., 1 tab.

  13. How to Estimate the Value of Service Reliability Improvements

    SciTech Connect (OSTI)

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

    2010-06-08

    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.

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

    E-Print Network [OSTI]

    Kim, Younjong

    1987-01-01

    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...

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

    SciTech Connect (OSTI)

    Caudell, Thomas P.; He, Hongbo; Menicucci, David F.; Mammoli, Andrea A.; Burch, Jay

    2011-07-01

    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.

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

    E-Print Network [OSTI]

    Duttagupta, Suchismita Sujaya

    2006-08-16

    is associated 11 Fig. 1. Sample Distribution Network with the network response to dynamic and transient failures caused from faults and other disturbances, which could result in widespread cascading outages and loss of stability [11]. This research will focus... and maintain reliable power systems because cost of interruptions and power outages can have severe economic impact on the utility and its customers. At present, the deregulated electric power utilities are being restructured and operated as distinct generation...

  17. SLAC modulator operation and reliability in the SLC Era

    SciTech Connect (OSTI)

    Donaldson, A.R.; Ashton, J.R.

    1992-06-01

    A discussion of the operation and reliability of the 244 modulators in the SLAC linac with an emphasis on the past three years of operation. The linac modulators were designed and built in the 60`s, upgraded for the SLAC Linear Collider (SLC) in the mid 80s, and despite their age are still reliable accelerator components. The 60s modulator operated at 65 MW peak and 83 kW average power. The upgrade resulted in 150 MW peak output at an average power of 87 kW, a modest increase since the repetition rate was dropped from 360 to 120 Hz. In the present accelerator configuration, the Linac operates as a source of electrons and positrons to a single pass coillider. The classic collider is a storage ring filled with oppositely charged, counter-rotating particles which are allowed to collide until an accelerator fault occurs and the stored beams are aborted. A reasonable storage ring can store and collide particles for as long as eight hours with a 10 or 20 minute filling time. A single pass collider, + on the other hand, can only produce e{sup {minus}} and e{sup +} collisions at whatever rate the source operates. To be effective the SLC must operate at 120 Hz with a very high degree of reliability and on a continuous basis. Fortunately, the linac has a modest excess of modulator/klystron systems which allows some measure of redundancy and hence some freedom from the constraint that all 244 modulator/klystrons operate simultaneously. Nonetheless, high importance is placed on modulator MTBF and MTRR or, in the parlance of reliability experts and accelerator physicists, availability. This is especially true of the modulators associated with the fundamental requirements of a collider such as injection, compression and positron production.

  18. SLAC modulator operation and reliability in the SLC Era

    SciTech Connect (OSTI)

    Donaldson, A.R.; Ashton, J.R.

    1992-06-01

    A discussion of the operation and reliability of the 244 modulators in the SLAC linac with an emphasis on the past three years of operation. The linac modulators were designed and built in the 60's, upgraded for the SLAC Linear Collider (SLC) in the mid 80s, and despite their age are still reliable accelerator components. The 60s modulator operated at 65 MW peak and 83 kW average power. The upgrade resulted in 150 MW peak output at an average power of 87 kW, a modest increase since the repetition rate was dropped from 360 to 120 Hz. In the present accelerator configuration, the Linac operates as a source of electrons and positrons to a single pass coillider. The classic collider is a storage ring filled with oppositely charged, counter-rotating particles which are allowed to collide until an accelerator fault occurs and the stored beams are aborted. A reasonable storage ring can store and collide particles for as long as eight hours with a 10 or 20 minute filling time. A single pass collider, + on the other hand, can only produce e{sup {minus}} and e{sup +} collisions at whatever rate the source operates. To be effective the SLC must operate at 120 Hz with a very high degree of reliability and on a continuous basis. Fortunately, the linac has a modest excess of modulator/klystron systems which allows some measure of redundancy and hence some freedom from the constraint that all 244 modulator/klystrons operate simultaneously. Nonetheless, high importance is placed on modulator MTBF and MTRR or, in the parlance of reliability experts and accelerator physicists, availability. This is especially true of the modulators associated with the fundamental requirements of a collider such as injection, compression and positron production.

  19. Gearbox Reliability Collaborative High-Speed Shaft Calibration

    SciTech Connect (OSTI)

    Keller, J.; McNiff, B.

    2014-09-01

    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.

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

    SciTech Connect (OSTI)

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

    2004-03-01

    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.

  1. Gearbox Reliability Collaborative Phase 3 Gearbox 2 Test Plan

    SciTech Connect (OSTI)

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

    2013-04-01

    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.

  2. Achieving High Reliability Operations Through Multi-Program Integration

    SciTech Connect (OSTI)

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

    2009-04-01

    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.

  3. Estimation of structural reliability under combined loads. [PWR; BWR

    SciTech Connect (OSTI)

    Shinozuka, M.; Kako, T.; Hwang, H.; Brown, P.; Reich, M.

    1983-01-01

    For the overall safety evaluation of seismic category I structures subjected to various load combinations, a quantitative measure of the structural reliability in terms of a limit state probability can be conveniently used. For this purpose, the reliability analysis method for dynamic loads, which has recently been developed by the authors, was combined with the existing standard reliability analysis procedure for static and quasi-static loads. The significant parameters that enter into the analysis are: the rate at which each load (dead load, accidental internal pressure, earthquake, etc.) will occur, its duration and intensity. All these parameters are basically random variables for most of the loads to be considered. For dynamic loads, the overall intensity is usually characterized not only by their dynamic components but also by their static components. The structure considered in the present paper is a reinforced concrete containment structure subjected to various static and dynamic loads such as dead loads, accidental pressure, earthquake acceleration, etc. Computations are performed to evaluate the limit state probabilities under each load combination separately and also under all possible combinations of such loads.

  4. Managing electricity reliability risk through the futures markets

    SciTech Connect (OSTI)

    Siddiqui, Afzal S.

    2000-10-01

    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.

  5. Plutonium focus area

    SciTech Connect (OSTI)

    NONE

    1996-08-01

    To ensure research and development programs focus on the most pressing environmental restoration and waste management problems at the U.S. Department of Energy (DOE), the Assistant Secretary for the Office of Environmental Management (EM) established a working group in August 1993 to implement a new approach to research and technology development. As part of this new approach, EM developed a management structure and principles that led to the creation of specific Focus Areas. These organizations were designed to focus the scientific and technical talent throughout DOE and the national scientific community on the major environmental restoration and waste management problems facing DOE. The Focus Area approach provides the framework for intersite cooperation and leveraging of resources on common problems. After the original establishment of five major Focus Areas within the Office of Technology Development (EM-50, now called the Office of Science and Technology), the Nuclear Materials Stabilization Task Group (EM-66) followed the structure already in place in EM-50 and chartered the Plutonium Focus Area (PFA). The following information outlines the scope and mission of the EM, EM-60, and EM-66 organizations as related to the PFA organizational structure.

  6. Subsurface contaminants focus area

    SciTech Connect (OSTI)

    1996-08-01

    The US Department of Enregy (DOE) Subsurface Contaminants Focus Area is developing technologies to address environmental problems associated with hazardous and radioactive contaminants in soil and groundwater that exist throughout the DOE complex, including radionuclides, heavy metals; and dense non-aqueous phase liquids (DNAPLs). More than 5,700 known DOE groundwater plumes have contaminated over 600 billion gallons of water and 200 million cubic meters of soil. Migration of these plumes threatens local and regional water sources, and in some cases has already adversely impacted off-site rsources. In addition, the Subsurface Contaminants Focus Area is responsible for supplying technologies for the remediation of numerous landfills at DOE facilities. These landfills are estimated to contain over 3 million cubic meters of radioactive and hazardous buried Technology developed within this specialty area will provide efective methods to contain contaminant plumes and new or alternative technologies for development of in situ technologies to minimize waste disposal costs and potential worker exposure by treating plumes in place. While addressing contaminant plumes emanating from DOE landfills, the Subsurface Contaminants Focus Area is also working to develop new or alternative technologies for the in situ stabilization, and nonintrusive characterization of these disposal sites.

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

    SciTech Connect (OSTI)

    Bronevetsky, G

    2012-04-02

    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.

  8. ARCH: Practical Channel Hopping for Reliable Home-Area Sensor Networks Mo Sha, Gregory Hackmann, Chenyang Lu

    E-Print Network [OSTI]

    Lu, Chenyang

    home automation applications such as smart energy usage and assisted living. However, recent empirical

  9. Accurate, objective, reliable, and timely predictions of crop yield over large areas are critical to helping ensure the

    E-Print Network [OSTI]

    Liang, Shunlin

    /export plans and prices. Development of objective mathematical models of crop yield prediction using remote

  10. ,"Table 2. Noncoincident Peak Load, by North American Electric Reliability Corporation Assessment Area,"

    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 PageMonthly","10/2015"4,"Ames City of",6,1,"Omaha Public PowerOECD/IEA - 2008Wellhead PriceConsumption by EndAnnual",2014Annual",2014Totale.1..

  11. Program Areas | National Security | ORNL

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

    Organizations National Security Home | Science & Discovery | National Security | Program Areas SHARE Program Areas image Oak Ridge National Laboratory (ORNL) has a robust...

  12. On the reliability of microvariability tests in quasars

    SciTech Connect (OSTI)

    De Diego, José A.

    2014-11-01

    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.

  13. Fifty Years of THERP and Human Reliability Analysis

    SciTech Connect (OSTI)

    Ronald L. Boring

    2012-06-01

    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 Risř 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.

  14. EA-1801: Granite Reliable Power Wind Park Project in Coos County...

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

    01: Granite Reliable Power Wind Park Project in Coos County, NH EA-1801: Granite Reliable Power Wind Park Project in Coos County, NH June 25, 2010 EA-1801: Final Environmental...

  15. 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

  16. A Survey of NASA and Military Standards on Fault Tolerance and Reliability Applied to Robotics

    E-Print Network [OSTI]

    Rice University - Center for Cooperative Autonomous Robots for Hazardous Environments

    A Survey of NASA and Military Standards on Fault Tolerance and Reliability Applied to Robotics of relevant Military and NASA standards for reliability and fault toler­ ance is included. 1 Introduction

  17. When Sugar Turns to Sh%&: Immediate Action Decision Making and Resilience in High Reliability Teams 

    E-Print Network [OSTI]

    Wesner, Bradley Scott

    2012-02-14

    more nuanced study of high reliability processes within team contexts is warranted. This study focuses on organizational teams which are faced with the challenges of maintaining high levels of reliability. Of particular interest is how teams manage...

  18. Assessing I-Grid(TM) web-based monitoring for power quality and reliability benchmarking

    E-Print Network [OSTI]

    Divan, Deepak; Brumsickle, William; Eto, Joseph

    2003-01-01

    not affect the regional power grid. Page 7 of 10 January 23,Paradigm in Distribution Grid Power Quality And ReliabilitySheehan 2002]. The I-Grid power quality and reliability

  19. Transmission System Expansion Plans in View Point of Deterministic, Probabilistic and Security Reliability Criteria

    E-Print Network [OSTI]

    Transmission System Expansion Plans in View Point of Deterministic, Probabilistic and Security reliability criterion, probabilistic reliability criterion and security criterion based on N- contingency control system as well as reasonable strength of grid originally. Because investment for power system

  20. Reliability-based calibration of design seismic response spectra and structural acceptance criteria

    E-Print Network [OSTI]

    Baker, Jack W.

    Reliability-based calibration of design seismic response spectra and structural acceptance criteria: Earthquake engineering design requires an evaluation of the structure's reliability over future seismic loads alternate "explicit" check, which commonly specifies a design spectrum and associated structural response

  1. Quasi-optical network analyzers and high-reliability RF MEMS switched capacitors

    E-Print Network [OSTI]

    Grichener, Alexander

    2011-01-01

    Chapter 3 High-Reliability RF MEMS Switched Capacitors 3.1Technology 1.2 RF MEMS Technology . . . . . . . . . . . . .Reliability High-Q Switched RF MEMS Capacitors” IEEE Int.

  2. System Reliability: A Case When Fuzzy Logic Enhances Probability Theory's Ability

    E-Print Network [OSTI]

    Kreinovich, Vladik

    . Zadeh explains that probabil­ ity theory needs an infusion of fuzzy logic to enhance its ability to deal such an infusion is indeed successful: the problem of system reliability. 1. Reliability: Brief Introduction

  3. New York Completes Smart Grid Project to Build a More Reliable...

    Energy Savers [EERE]

    New York Completes Smart Grid Project to Build a More Reliable, Resilient Power Grid New York Completes Smart Grid Project to Build a More Reliable, Resilient Power Grid April 15,...

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

    E-Print Network [OSTI]

    Jiang, Kai

    2012-11-05

    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 ...

  5. 2012 Reliability & Markets Peer Review | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematics AndBeryllium Diseasem-2m-3l-04-05-2012.xlsxFront CoverDepartment ofLoad as2012 ProgramReliability

  6. Robot-Powered Reliability Testing at NREL's ESIF

    SciTech Connect (OSTI)

    Harrison, Kevin

    2013-12-05

    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.

  7. Improving reliability in the SLC (Stanford Linear Collider) control system

    SciTech Connect (OSTI)

    Heinen, N.; Spencer, N.; Tinsman, J.

    1989-10-01

    During the past year, considerable emphasis has been placed on improving the overall reliability of the SLC control system. The Errorlog Facility has proven a useful tool to diagnose hardware and software problems. By analyzing the various error messages and their correlations, one can usually determine the software component or hardware module causing faults. Daily summaries help to identify problems so that they can be remedied before they become catastrophic; thereby bringing about a considerable increase in performance. We discuss the various tools we use and our operational experience with them. 3 refs., 6 figs.

  8. Blade reliability collaborative : collection of defect, damage and repair data.

    SciTech Connect (OSTI)

    Ashwill, Thomas D.; Ogilvie, Alistair B.; Paquette, Joshua A.

    2013-04-01

    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.

  9. Computing fractal dimension in supertransient systems directly, fast and reliable

    E-Print Network [OSTI]

    Romulus Breban; Helena E. Nusse

    2006-08-07

    Chaotic transients occur in many experiments including those in fluids, in simulations of the plane Couette flow, and in coupled map lattices and they are a common phenomena in dynamical systems. Superlong chaotic transients are caused by the presence of chaotic saddles whose stable sets have fractal dimensions that are close to phase-space dimension. For many physical systems chaotic saddles have a big impact on laboratory measurements, and it is important to compute the dimension of such stable sets including fractal basin boundaries through a direct method. In this work, we present a new method to compute the dimension of stable sets of chaotic saddles directly, fast, and reliable.

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

    E-Print Network [OSTI]

    Atlas, R. D.

    1986-01-01

    , and the paybacks associated with instituting a program of planned and systematic maintenance manage ment of that system. Energy costs can be reduced by 10% and maintenance costs by 20%, while achieving other tan gible improvements in the reliability...-up; and 6)'software and data base management. Several case studies, in which the concept has been success fully applied, will be presented. INTRODUCTION Energy costs have been on the rise for the last 10 years and have now leveled off due to global...

  11. Robot-Powered Reliability Testing at NREL's ESIF

    ScienceCinema (OSTI)

    Harrison; Kevin

    2014-06-10

    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.

  12. Robot-Powered Reliability Testing at NREL's ESIF

    SciTech Connect (OSTI)

    Harrison; Kevin

    2013-12-05

    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.

  13. Reliable Gas Turbine Output: Attaining Temperature Independent Performance 

    E-Print Network [OSTI]

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

    1992-01-01

    stream_source_info ESL-IE-92-04-10.pdf.txt stream_content_type text/plain stream_size 16831 Content-Encoding ISO-8859-1 stream_name ESL-IE-92-04-10.pdf.txt Content-Type text/plain; charset=ISO-8859-1 RELIABLE GAS TURBINE... OUTPUT; ATTAINING TEMPERATURE INDEPENDENT PERFORMANCE James E. Neeley, P.E. Power Plant Engineer Public Utility Commission of Texas Austin, Texas ABSTRACT Improvements in gas turbine efficiency, coupled with dropping gas prices, has made gas...

  14. Reliability Testing the Die-Attach of CPV Cell Assemblies

    SciTech Connect (OSTI)

    Bosco, N.; Sweet, C.; Kurtz, S.

    2011-02-01

    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.

  15. NREL: Gearbox Reliability Collaborative - Working with the Gearbox

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on771/6/14RecentGeospatialReliability Collaborative Research Wind

  16. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAbout UsRegional companiesReliability

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

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II)Geothermal Energy &WaterNewPhotoionizationPowerRadarReliability,

  18. Renewable Resource Integration Project - Scoping Study of Strategic Transmission, Operations, and Reliability Issues

    SciTech Connect (OSTI)

    Eto, Joseph; Budhraja, Vikram; Ballance, John; Dyer, Jim; Mobasheri, Fred; Eto, Joseph

    2008-07-01

    California is on a path to increase utilization of renewable resources. California will need to integrate approximately 30,000 megawatts (MW) of new renewable generation in the next 20 years. Renewable resources are typically located in remote locations, not near the load centers. Nearly two/thirds or 20,000 MW of new renewable resources needed are likely to be delivered to Los Angeles Basin transmission gateways. Integration of renewable resources requires interconnection to the power grid, expansion of the transmission system capability between the backbone power grid and transmission gateways, and increase in delivery capacity from transmission gateways to the local load centers. To scope the transmission, operations, and reliability issues for renewables integration, this research focused on the Los Angeles Basin Area transmission gateways where most of new renewables are likely. Necessary actions for successful renewables integration include: (1) Expand Los Angeles Basin Area transmission gateway and nomogram limits by 10,000 to 20,000 MW; (2) Upgrade local transmission network for deliverability to load centers; (3) Secure additional storage, demand management, automatic load control, dynamic pricing, and other resources that meet regulation and ramping needed in real time operations; (4) Enhance local voltage support; and (5) Expand deliverability from Los Angeles to San Diego and Northern California.

  19. Performance and Reliability of Bonded Interfaces for High-Temperature Packaging (Presentation)

    SciTech Connect (OSTI)

    Devoto, D.

    2014-06-01

    This presentation reviews the status of the performance and reliability of bonded interfaces for high-temperature packaging.

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

    E-Print Network [OSTI]

    Mu, Yali

    2013-01-01

    of Software Selection . . . . . . . . . . . . . . . . . . .for the software reliability. . . . . . . . . . . . . . K-number of bugs for software. Accumulated number of bugs

  1. 100 Area - Hanford Site

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDidDevelopmentataboutScalablePhysicist: Christian Bauer 101000 Area

  2. 300 Area - Hanford Site

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.TheoryTuesday, August 10, 20102016 News Below are newsBelle-IIProcesses -1300 Area

  3. 700 Area - Hanford Site

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.TheoryTuesday, August 10, 20102016 News Below are4B Drawings 4B618-10 and700 Area

  4. Tank Farm Area Closure

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With U.S. Coal StocksSuppliers Tag:Take Action APPENDIX-11CoverArea

  5. Tank Farm Area Closure

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With U.S. Coal StocksSuppliers Tag:Take Action APPENDIX-11CoverArea

  6. Material Disposal Areas

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse BergkampCentermillion toMSDS onBudgetMaterial Disposal Areas Material

  7. 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

  8. A Reliable and Secure Cloud Storage Schema Using Multiple Service Providers

    E-Print Network [OSTI]

    Xu, Haiping

    A Reliable and Secure Cloud Storage Schema Using Multiple Service Providers Haiping Xu and Deepti stored in the cloud. In this paper, we propose a reliable and secure cloud storage schema using multiple at the server side, we propose a reliable and secure cloud storage schema that can be implemented at the client

  9. IEEE TRANSACTIONS ON RELIABILITY, VOL. 63, NO. 3, SEPTEMBER 2014 1 In Memoriam

    E-Print Network [OSTI]

    Li, Haijun

    IEEE TRANSACTIONS ON RELIABILITY, VOL. 63, NO. 3, SEPTEMBER 2014 1 In Memoriam Susan Hong Xu (1952­2014) (Associate Editor of IEEE Transactions on Reliability) SUSAN Hong Xu (1952­2014) was for twenty-seven years, Professor Xu has provided outstanding service as an Associate Editor of IEEE TRANSACTIONS ON RELIABILITY

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

    E-Print Network [OSTI]

    Alemazkoor, Negin

    2014-08-20

    . In this research, data from Katy Freeway, where travelers choose between tolled but reliable lanes and free but less reliable lanes, was used in an attempt to find the best measurement of reliability that could lead to the best explanation of travelers’ lane choice...

  11. Measuring Reliability of Software Products Pankaj Jalote, Brendan Murphy, Mario Garzia, Ben Errez

    E-Print Network [OSTI]

    Jalote, Pankaj

    1 Measuring Reliability of Software Products Pankaj Jalote, Brendan Murphy, Mario Garzia, Ben Errez products. In these approaches, the product reliability is traditionally measured in terms of catastrophic, and then discuss two systems being used for measuring reliability of commercial software products. 1. Introduction

  12. Performance and Reliability of Interface Materials for Automotive Power Electronics (Presentation)

    SciTech Connect (OSTI)

    Narumanchi, S.; DeVoto, D.; Mihalic, M.; Paret, P.

    2013-07-01

    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.

  13. datamanagementgroup 2011 SURVEY AREA SUMMARY

    E-Print Network [OSTI]

    Toronto, University of

    Collingwood CFB Borden 0 10 20 Kilometers Area = 521,900 Hectares #12;POPULATION CHARACTERISTICS Population

  14. Wide-area, real-time monitoring and visualization system

    DOE Patents [OSTI]

    Budhraja, Vikram S. (Los Angeles, CA); Dyer, James D. (La Mirada, CA); Martinez Morales, Carlos A. (Upland, CA)

    2011-11-15

    A real-time performance monitoring system for monitoring an electric power grid. The electric power grid has a plurality of grid portions, each grid portion corresponding to one of a plurality of control areas. The real-time performance monitoring system includes a monitor computer for monitoring at least one of reliability metrics, generation metrics, transmission metrics, suppliers metrics, grid infrastructure security metrics, and markets metrics for the electric power grid. The data for metrics being monitored by the monitor computer are stored in a data base, and a visualization of the metrics is displayed on at least one display computer having a monitor. The at least one display computer in one said control area enables an operator to monitor the grid portion corresponding to a different said control area.

  15. Wide-area, real-time monitoring and visualization system

    SciTech Connect (OSTI)

    Budhraja, Vikram S.; Dyer, James D.; Martinez Morales, Carlos A.

    2013-03-19

    A real-time performance monitoring system for monitoring an electric power grid. The electric power grid has a plurality of grid portions, each grid portion corresponding to one of a plurality of control areas. The real-time performance monitoring system includes a monitor computer for monitoring at least one of reliability metrics, generation metrics, transmission metrics, suppliers metrics, grid infrastructure security metrics, and markets metrics for the electric power grid. The data for metrics being monitored by the monitor computer are stored in a data base, and a visualization of the metrics is displayed on at least one display computer having a monitor. The at least one display computer in one said control area enables an operator to monitor the grid portion corresponding to a different said control area.

  16. Reliability comparison of various nuclear propulsion configurations for Mars mission

    SciTech Connect (OSTI)

    Segna, D.R. [USDOE Richland Operations Office, WA (United States); Dagle, J.E. [Pacific Northwest Lab., Richland, WA (United States); Lyon, W.F. III [Westinghouse Hanford Co., Richland, WA (United States)

    1992-01-01

    Currently, trade-offs are being made among the various propulsion systems being considered for the Space Exploration Initiative (SEI) missions. It is necessary to investigate the reliability aspects as well as the efficiency, mass savings, and experience characteristics of the various configurations. Reliability is a very important factor for the SEI missions because of the long duration and because problems will be fixed onboard. The propulsion options that were reviewed consist of nuclear thermal propulsion (NTP), nuclear electric propulsion (NEP) and various configurations of each system. There were four configurations developed for comparison with the NTP as baselined in the Synthesis (1991): (1) NEP, (2) hybrid NEP/NTP, (3) hybrid with power beaming, and (4) NTP upper stage on the heavy lift launch vehicle (HLLV). The comparisons were based more or less on a qualitative review of complexity, stress levels and operations for each of the four configurations. Each configuration included a pressurized NEP and an NTP ascent stage propulsion system for the Mars mission.

  17. Integrated design environment for human performance and human reliability analysis

    SciTech Connect (OSTI)

    Nelson, W.R.

    1997-05-01

    Work over the last few years at the Idaho National Engineering and Environmental Laboratory (INEEL) has included a major focus on applying human performance and human reliability knowledge and methods as an integral element of system design and development. This work has been pursued in programs in a wide variety of technical domains, beginning with nuclear power plant operations. Since the mid-1980`s the laboratory has transferred the methods and tools developed in the nuclear domain to military weapons systems and aircraft, offshore oil and shipping operations, and commercial aviation operations and aircraft design. Through these diverse applications the laboratory has developed an integrated approach and framework for application of human performance analysis, human reliability analysis (HRA), operational data analysis, and simulation studies of human performance to the design and development of complex systems. This approach was recently tested in the NASA Advanced Concepts Program {open_quotes}Structured Human Error Analysis for Aircraft Design.{close_quotes} This program resulted in the prototype software tool THEA (Tool for Human Error Analysis) for incorporating human error analysis in the design of commercial aircraft, focusing on airplane maintenance tasks. Current effort is directed toward applying this framework to the development of advanced Air Traffic Management (ATM) systems as part of NASA`s Advanced Air Transportation Technologies (AATT) program. This paper summarizes the approach, describes recent and current applications in commercial aviation, and provides perspectives on how the approach could be utilized in the nuclear power industry.

  18. T-1 Training Area

    ScienceCinema (OSTI)

    None

    2015-01-09

    Another valuable homeland security asset at the NNSS is the T-1 training area, which covers more than 10 acres and includes more than 20 separate training venues. Local, County, and State first responders who train here encounter a variety of realistic disaster scenarios. A crashed 737 airliner lying in pieces across the desert, a helicopter and other small aircraft, trucks, buses, and derailed train cars are all part of the mock incident scene. After formal classroom education, first responders are trained to take immediate decisive action to prevent or mitigate the use of radiological or nuclear devices by terrorists. The Counterterrorism Operations Support Center for Radiological Nuclear Training conducts the courses and exercises providing first responders from across the nation with the tools they need to protect their communities. All of these elements provide a training experience that cannot be duplicated anywhere else in the country.

  19. T-1 Training Area

    SciTech Connect (OSTI)

    2014-11-07

    Another valuable homeland security asset at the NNSS is the T-1 training area, which covers more than 10 acres and includes more than 20 separate training venues. Local, County, and State first responders who train here encounter a variety of realistic disaster scenarios. A crashed 737 airliner lying in pieces across the desert, a helicopter and other small aircraft, trucks, buses, and derailed train cars are all part of the mock incident scene. After formal classroom education, first responders are trained to take immediate decisive action to prevent or mitigate the use of radiological or nuclear devices by terrorists. The Counterterrorism Operations Support Center for Radiological Nuclear Training conducts the courses and exercises providing first responders from across the nation with the tools they need to protect their communities. All of these elements provide a training experience that cannot be duplicated anywhere else in the country.

  20. A reliability and mass perspective of SP-100 Stirling cycle lunar-base powerplant designs

    SciTech Connect (OSTI)

    Bloomfield, H.S.

    1991-06-01

    The purpose was to obtain reliability and mass perspectives on selection of space power system conceptual designs based on SP-100 reactor and Stirling cycle power-generation subsystems. The approach taken was to: (1) develop a criterion for an acceptable overall reliability risk as a function of the expected range of emerging technology subsystem unit reliabilities; (2) conduct reliability and mass analyses for a diverse matrix of 800-kWe lunar-base design configurations employing single and multiple powerplants with both full and partial subsystem redundancy combinations; and (3) derive reliability and mass perspectives on selection of conceptual design configurations that meet an acceptable reliability criterion with the minimum system mass increase relative to reference powerplant design. The developed perspectives provided valuable insight into the considerations required to identify and characterize high-reliability and low-mass lunar-base powerplant conceptual design.

  1. DOE Designates Southwest Area and Mid-Atlantic Area National...

    Energy Savers [EERE]

    Corridors DOE Designates Southwest Area and Mid-Atlantic Area National Interest Electric Transmission Corridors October 2, 2007 - 2:50pm Addthis WASHINGTON, DC - U.S. Department...

  2. Note: Reliable low-vibration piezo-mechanical shutter

    SciTech Connect (OSTI)

    Bauer, Michael, E-mail: mibauer@physik.uni-kl.de; Franzreb, Philipp Pierre; Widera, Artur [Department of Physics and State-Research Center OPTIMAS, University of Kaiserslautern, 67663 Kaiserslautern (Germany); Spethmann, Nicolas [Department of Physics, University of California, Berkeley, California 94720 (United States)

    2014-09-15

    We present a mechanical shutter based on a bending piezo-actuator. The shutter features an active aperture of about 2 mm, allowing for full extinction and lossless transmission of a beam. Acoustic noise and mechanical vibrations produced are very low and the shutter is outstandingly long-lived; a test device has undergone 20 × 10{sup 6} cycles without breaking. A reflector makes the shutter capable of reliably interrupting a beam with at least 2 W of cw power at 780 nm. The shutter is well suited to create pulses as short as 16 ms, while pulse lengths down to 1 ms are possible. The rise and fall times are approximately 120 µs, with a delay of 2 ms. Jitter stays below 10 µs, while long-term drifts stay well below 500 µs.

  3. 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.

    2005-11-01

    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.

  4. Nuclear electric propulsion operational reliability and crew safety study

    SciTech Connect (OSTI)

    Karns, J.J.; Fragola, J.R.; Kahan, L.; Pelaccio, D. (Science Applications International Corporation, 8 W 40th St., 14th Floor, New York, New York 10018 (United States))

    1993-01-20

    The central purpose of this analysis is to assess the achievability'' of a nuclear electric propulsion (NEP) system in a given mission. Achievability'' is a concept introduced to indicate the extent to which a system that meets or achieves its design goals might be implemented using the existing technology base. In the context of this analysis, the objective is to assess the achievability of an NEP system for a manned Mars mission as it pertains to operational reliability and crew safety goals. By varying design parameters, then examining the resulting system achievability, the design and mission risk drivers can be identified. Additionally, conceptual changes in design approach or mission strategy which are likely to improve overall achievability of the NEP system can be examined.

  5. 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

    2013-09-01

    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.

  6. Probability distributions of some power system reliability indices 

    E-Print Network [OSTI]

    Dip, Minh

    1978-01-01

    of three renewal process Let {N.(t),t>0} denote the i t h renewal process. Thus i f N (t) i s the number of renewals ( f a i l u r e s ) in (0,t) in the pooled process, then: m N D(t) = E N.(t) . (13) " i=l 1 9 10 Khintchine and Gri g e l i o n i...PROBABILITY DISTRIBUTIONS OF SOME POWER SYSTEM RELIABILITY INDICES A Thesis by MINH DIP (DIEP) Submitted to the Graduate College of Texas A&M University in p a r t i a l f u l f i l l m e n t of the requirement f o r the degree of MASTER...

  7. NLC Reliability Analysis Notes: Klystron-Modulator System (LCC-0029)

    SciTech Connect (OSTI)

    Wilson, Z.

    2004-03-23

    This paper address the reliability and availability issues to be faced in deploying and operating the klystron modulator assemblies proposed for the Next Linear Collider (NLC). The rf power sources are a major system of the NLC and require a high uptime in order to reach the goal of 0.85 availability. Since the NLC is made up of several systems, not just klystron-modulator assemblies, the availability goal for the assemblies must be higher than 0.85. Currently this goal is at least 0.95. This short paper summarizes the analysis currently under way to determine whether the design of the rf power system will meet the design availability goal.

  8. 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

    2010-03-23

    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.

  9. 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.

    2014-04-01

    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.

  10. Component Failure Rate Data Sources for Probabilistic Safety and Reliability

    SciTech Connect (OSTI)

    L. C. Cadwallader; S. A. Eide

    2010-09-01

    Probabilistic safety methods are being used in several industries, including chemical, manufacturing, and energy. When performing reliability studies or using probabilistic safety approaches, a basic need arises for input data on failure rates of the mechanical, electrical, instrumentation and control, and other components that comprise the engineering systems in the facility. Some companies have many types of data stored and can retrieve these in-house data for such uses. Other companies hire consultants to perform safety assessments; the consulting firms often use their own data bases. For those analysts who do not have either of those options available, this paper presents some data sources that are retrievable from the literature. These data sources have been evaluated with a basic rating of usefulness for analysis work, and each has a description of what data can be found in the citation that can be used to support assessments in industry. The accessibility of data documents via the internet is also described.

  11. Low voltage secondary network cable reliability study. Final report

    SciTech Connect (OSTI)

    1995-05-01

    In an attempt to find clues to the causes of manhole fires and explosions, researchers removed several aged low voltage network cables from service on the United Illuminating Company system. Examination of their physical, chemical, and electrical properties indicated that any deterioration of the cables that had occurred during their approximately 35 year service life was minor and did not affect reliability for continued service. Cables were found to have retained excellent properties despite their long age in service. For example, AC breakdown strength, dissipation factor, and percent elongation were all satisfactory. Insulation was coherent, not brittle; and the jackets did not crack or craze on bending. The tested cables compare favorably, physically and electrically, with non-jacketed rubber cables presently in service.

  12. The SACADA database for human reliability and human performance

    SciTech Connect (OSTI)

    Y. James Chang; Dennis Bley; Lawrence Criscione; Barry Kirwan; Ali Mosleh; Todd Madary; Rodney Nowell; Robert Richards; Emilie M. Roth; Scott Sieben; Antonios Zoulis

    2014-05-01

    Lack of appropriate and sufficient human performance data has been identified as a key factor affecting human reliability analysis (HRA) quality especially in the estimation of human error probability (HEP). The Scenario Authoring, Characterization, and Debriefing Application (SACADA) database was developed by the U.S. Nuclear Regulatory Commission (NRC) to address this data need. An agreement between NRC and the South Texas Project Nuclear Operating Company (STPNOC) was established to support the SACADA development with aims to make the SACADA tool suitable for implementation in the nuclear power plants' operator training program to collect operator performance information. The collected data would support the STPNOC's operator training program and be shared with the NRC for improving HRA quality. This paper discusses the SACADA data taxonomy, the theoretical foundation, the prospective data to be generated from the SACADA raw data to inform human reliability and human performance, and the considerations on the use of simulator data for HRA. Each SACADA data point consists of two information segments: context and performance results. Context is a characterization of the performance challenges to task success. The performance results are the results of performing the task. The data taxonomy uses a macrocognitive functions model for the framework. At a high level, information is classified according to the macrocognitive functions of detecting the plant abnormality, understanding the abnormality, deciding the response plan, executing the response plan, and team related aspects (i.e., communication, teamwork, and supervision). The data are expected to be useful for analyzing the relations between context, error modes and error causes in human performance.

  13. Small Water System Management Program: 100 K Area

    SciTech Connect (OSTI)

    Hunacek, G.S. Jr. [Westinghouse Hanford Co., Richland, WA (United States)

    1995-06-29

    Purposes of this document are: to provide an overview of the service and potable water system presently in service at the Hanford Site`s 100 K Area; to provide future system forecasts based on anticipated DOE activities and programs; to delineate performance, design, and operations criteria; and to describe planned improvements. The objective of the small water system management program is to assure the water system is properly and reliably managed and operated, and continues to exist as a functional and viable entity in accordance with WAC 246-290-410.

  14. F Reactor Area Cleanup Complete

    Broader source: Energy.gov [DOE]

    RICHLAND, Wash. – U.S. Department of Energy (DOE) contractors have cleaned up the F Reactor Area, the first reactor area at the Hanford Site in southeastern Washington state to be fully remediated.

  15. Monroe Urbanized Area MTP 2035 

    E-Print Network [OSTI]

    Monroe Urbanized Area Metropolitan Planning Organization

    2010-10-31

    /plain; charset=ISO-8859-1 Monroe Urbanized Area MTP 2035 The 2035 Metropolitan Transportation Plan for the Monroe Urbanized Area Developed for The Monroe Urbanized Area Metropolitan Planning Organization and The Louisiana Department... of Transportation and Development Developed by In association with Neel-Schaffer, Inc. **DRAFT** Adopted Date Here This document was prepared in cooperation with: The Monroe Urbanized Area MPO Technical Advisory Committee and The Louisiana...

  16. Communication in Home Area Networks

    E-Print Network [OSTI]

    Wang, Yubo

    2012-01-01

    used in area like smart buildings, street light controls andbuilding. This section focuses on HAN design to address two smart

  17. Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States

    E-Print Network [OSTI]

    Stadler, Michael

    2009-01-01

    Delivery and Energy Reliability, Renewable and DistributedDistributed Energy Resource Characterizations”, National Renewable EnergyDelivery and Energy Reliability’s Renewable and Distributed

  18. datamanagementgroup 2011 SURVEY AREA SUMMARY

    E-Print Network [OSTI]

    Toronto, University of

    RidgeRd. SimcoeSt. Hwy.7&12 RegRd.57 0 4 8 Kilometers Area = 51,980 Hectares #12;POPULATION CHARACTERISTICSdatamanagementgroup 2011 SURVEY AREA SUMMARY DEPARTMENT OF CIVIL ENGINEERING - UNIVERSITY Drivers Vehicles Trips/day 2011 2006 1996 1986 datamanagementgroup 2011 SURVEY AREA SUMMARY DEPARTMENT

  19. datamanagementgroup 2011 SURVEY AREA SUMMARY

    E-Print Network [OSTI]

    Toronto, University of

    .7 4.1 5.8 27.9 TRIPS MADE TO TTS AREA 4,070,800 22.8% 51% 22% 6% 21% 61% 13% 12% 2% 8% 4% 7.1 3.3 7datamanagementgroup 2011 SURVEY AREA SUMMARY DEPARTMENT OF CIVIL ENGINEERING - UNIVERSITY OF TORONTO PREPARED BY 5 TRANSPORTATION TOMORROW SURVEY AREA City of Orillia Durham Region City

  20. Wind energy Computerized Maintenance Management System (CMMS) : data collection recommendations for reliability analysis.

    SciTech Connect (OSTI)

    Peters, Valerie A.; Ogilvie, Alistair; Veers, Paul S.

    2009-09-01

    This report addresses the general data requirements for reliability analysis of fielded wind turbines and other wind plant equipment. The report provides a list of the data needed to support reliability and availability analysis, and gives specific recommendations for a Computerized Maintenance Management System (CMMS) to support automated analysis. This data collection recommendations report was written by Sandia National Laboratories to address the general data requirements for reliability analysis of fielded wind turbines. This report is intended to help the reader develop a basic understanding of what data are needed from a Computerized Maintenance Management System (CMMS) and other data systems, for reliability analysis. The report provides: (1) a list of the data needed to support reliability and availability analysis; and (2) specific recommendations for a CMMS to support automated analysis. Though written for reliability analysis of wind turbines, much of the information is applicable to a wider variety of equipment and a wider variety of analysis and reporting needs.

  1. Report on Wind Turbine Subsystem Reliability - A Survey of Various Databases (Presentation)

    SciTech Connect (OSTI)

    Sheng, S.

    2013-07-01

    Wind industry has been challenged by premature subsystem/component failures. Various reliability data collection efforts have demonstrated their values in supporting wind turbine reliability and availability research & development and industrial activities. However, most information on these data collection efforts are scattered and not in a centralized place. With the objective of getting updated reliability statistics of wind turbines and/or subsystems so as to benefit future wind reliability and availability activities, this report is put together based on a survey of various reliability databases that are accessible directly or indirectly by NREL. For each database, whenever feasible, a brief description summarizing database population, life span, and data collected is given along with its features & status. Then selective results deemed beneficial to the industry and generated based on the database are highlighted. This report concludes with several observations obtained throughout the survey and several reliability data collection opportunities in the future.

  2. Geothermal resource area 9: Nye County. Area development plan

    SciTech Connect (OSTI)

    Pugsley, M.

    1981-01-01

    Geothermal Resource area 9 encompasses all of Nye County, Nevada. Within this area there are many different known geothermal sites ranging in temperature from 70/sup 0/ to over 265/sup 0/ F. Fifteen of the more major sites have been selected for evaluation in this Area Development Plan. Various potential uses of the energy found at each of the resource sites discussed in this Area Development Plan were determined after evaluating the area's physical characteristics, land ownership and land use patterns, existing population and projected growth rates, and transportation facilities, and comparing those with the site specific resource characteristics. The uses considered were divided into five main categories: electrical generation, space heating, recreation, industrial process heat, and agriculture. Within two of these categories certain subdivisions were considered separately. The findings about each of the 15 geothermal sites considered in this Area Development Plan are summarized.

  3. The Energy Policy Act's Reliability Provisions: Uncontroversial, Yes, but Doomed to Ineffectiveness?

    SciTech Connect (OSTI)

    Williams, Greg; Robinson, Andrea R.

    2006-02-01

    The electric industry grew up and matured under a regulatory regime that fostered reliable service as consistent with the service providers' best economic interests. But changes in the focus and structure of the electric industry have put strains on that regime - as starkly revealed in the 2003 blackout. Efforts to adopt enforceable reliability standards depend on the threat of penalties to outweigh the profit incentives that undermine reliability. It is not clear that those penalties will work.

  4. Can a photometric redshift code reliably determine dust extinction?

    E-Print Network [OSTI]

    T. S. R Babbedge; R. Whitaker; S. Morris

    2005-05-05

    Photometric redshifts can be routinely obtained to accuracies of better than 0.1 in Delta(z)/(1+z). However, the issue of dust extinction is one that has still not been well quantified. In this paper the success of two template-fitting photometric redshift codes (IMPZ and HYPERZ) at reliably returning Av in addition to redshift is explored. New data on the CNOC2 spectroscopic sample of 0.2

  5. A Test Stand for Ion Sources of Ultimate Reliability

    SciTech Connect (OSTI)

    Enparantza, R.; Uriarte, L.; Romano, P.; Alonso, J.; Ariz, I.; Egiraun, M.; Bermejo, F. J.; Etxebarria, V.; Lucas, J.; Del Rio, J. M.; Letchford, A.; Faircloth, D.; Stockli, M.

    2009-03-12

    The rationale behind the ITUR project is to perform a comparison between different kinds of H{sup -} ion sources using the same beam diagnostics setup. In particular, a direct comparison will be made in terms of the emittance characteristics of Penning Type sources such as those currently in use in the injector for the ISIS (UK) Pulsed Neutron Source and those of volumetric type such as that driving the injector for the ORNL Spallation Neutron Source (TN, U.S.A.). The endeavour here pursued is thus to build an Ion Source Test Stand where virtually any type of source can be tested and its features measured and, thus compared to the results of other sources under the same gauge. It would be possible then to establish a common ground for effectively comparing different ion sources. The long term objectives are thus to contribute towards building compact sources of minimum emittance, maximum performance, high reliability-availability, high percentage of desired particle production, stability and high brightness. The project consortium is lead by Tekniker-IK4 research centre and partners are companies Elytt Energy and Jema Group. The technical viability is guaranteed by the collaboration between the project consortium and several scientific institutions, such the CSIC (Spain), the University of the Basque Country (Spain), ISIS (STFC-UK), SNS (ORNL-USA) and CEA in Saclay (France)

  6. Reliability of radio transients detected in the Nasu sky survey

    SciTech Connect (OSTI)

    Aoki, Takahiro; Daishido, Tsuneaki; Tanaka, Tai; Nakao, Ryota; Nomura, Naomi; Sugisawa, Kentaro; Niinuma, Kotaro; Takefuji, Kazuhiro; Kida, Sumiko

    2014-01-20

    This article reports on the reliability of 11 radio transients detected in the Nasu sky survey. We derived false detection rates and evaluated the statistical significance of each transient source. A single source, labeled WJN J1443+3439, was statistically significant at the 10{sup –5} significance level; the other 10 sources were insignificant. On the basis of this single detection, the sky surface density of live radio transients was estimated to be 2{sub ?1.9}{sup +9}×10{sup ?6} deg{sup ?2} at a flux density above 3 Jy and a frequency of 1.42 GHz. Since this result is comparable with other survey results and known transients, WJN J1443+3439 could not be excluded. The sky surface density supported a power-law distribution of source count versus flux density. For transient events, the power-law exponent was approximately –3/2. These results are expected to assist radio variable/transient surveys in next-generation facilities such as the Square Kilometre Array.

  7. Using Accelerated Testing To Predict Module Reliability: Preprint

    SciTech Connect (OSTI)

    Wohlgemuth, J. H.; Kurtz, S.

    2011-07-01

    Long-term reliability is critical to the cost effectiveness and commercial success of photovoltaic (PV) products. Today most PV modules are warranted for 25 years, but there is no accepted test protocol to validate a 25-year lifetime. The qualification tests do an excellent job of identifying design, materials, and process flaws that are likely to lead to premature failure (infant mortality), but they are not designed to test for wear-out mechanisms that limit lifetime. This paper presents a method for evaluating the ability of a new PV module technology to survive long-term exposure to specific stresses. The authors propose the use of baseline technologies with proven long-term field performance as controls in the accelerated stress tests. The performance of new-technology modules can then be evaluated versus that of proven-technology modules. If the new-technology demonstrates equivalent or superior performance to the proven one, there is a high likelihood that they will survive versus the tested stress in the real world.

  8. Enabling rich applications and reliable data collection in embedded wireless networks with low-footprint devices

    E-Print Network [OSTI]

    Mukhopadhyay, Shoubhik

    2009-01-01

    Data Reliability in Wireless Sensor Networks . . . . . . .in Wireless Sensor Networks . . . . . . . . . . . . 3.2.1Network of enhanced wireless LAN with additional processing

  9. Economic analysis of the N-1 reliable unit commitment and transmission switching problem using duality concepts

    E-Print Network [OSTI]

    O’Neill, Richard P.; Hedman, Kory W.; Krall, Eric A.; Papavasiliou, Anthony; Oren, Shmuel S.

    2010-01-01

    of the N-1 reliable unit commitment 8. Schnyder, G. ,optimization of generation unit commitment and transmissionassociated with the unit commitment formulation: u gt , v

  10. Gearbox Reliability Collaborative: Gearbox 3 Manufacturing Status; NREL (National Renewable Energy Laboratory)

    SciTech Connect (OSTI)

    Keller, J.

    2015-02-17

    An update on the status of the Gearbox Reliability Collaborative (GRC) improved gearbox is presented, including a brief summary of key instrumentation.

  11. NREL Gearbox Reliability Collaborative: Comparing In-Field Gearbox Response to Different Dynamometer Test Conditions: Preprint

    SciTech Connect (OSTI)

    LaCava, W.; van Dam, J.; Wallen, R.; McNiff, B.

    2011-08-01

    This paper presents the results of NREL's Gearbox Reliability Collaborative comparison of dynamometer tests conducted on a 750-kW gearbox to field testing.

  12. 2011 Annual Planning Summary for Electricity Delivery and Energy Reliability (OE)

    Broader source: Energy.gov [DOE]

    The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2011 and 2012 within the Office of Electricity Delivery and Energy Reliability (OE).

  13. Physics of Reliability: Evaluating Design Insights for Component Technologies in Solar (PREDICTS) Funding Opportunity

    Broader source: Energy.gov [DOE]

    The Physics of Reliability: Evaluating Design Insights for Component Technologies in Solar (PREDICTS) program supports projects that evaluate the degradation and failure mechanisms of concentrating...

  14. Procedure for conducting a human-reliability analysis for nuclear power plants. Final report

    SciTech Connect (OSTI)

    Bell, B.J.; Swain, A.D.

    1983-05-01

    This document describes in detail a procedure to be followed in conducting a human reliability analysis as part of a probabilistic risk assessment when such an analysis is performed according to the methods described in NUREG/CR-1278, Handbook for Human Reliability Analysis with Emphasis on Nuclear Power Plant Applications. An overview of the procedure describing the major elements of a human reliability analysis is presented along with a detailed description of each element and an example of an actual analysis. An appendix consists of some sample human reliability analysis problems for further study.

  15. Reliability-based framework for fatigue damage prognosis of bonded structural elements in aerospace composite structures

    E-Print Network [OSTI]

    Gobbato, Maurizio

    2011-01-01

    of composite unmanned aerial vehicles structural components,components of unmanned aerial vehicles, Proc. COMPDYN 2009 –of Defense, Unmanned aerial vehicles reliability study,

  16. Clean, Efficient, and Reliable Power for the 21st Century: Fact...

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

    of Energy's Fuel Cell Technologies Office. Clean, Efficient, and Reliable Power for the 21st Century More Documents & Publications QER - Comment of Honda Motor Co., Inc. State of...

  17. Module PE.PAS.U21.5Multiarea reliability analysis 1 Module PE.PAS.U21.5

    E-Print Network [OSTI]

    McCalley, James D.

    Module PE.PAS.U21.5Multiarea reliability analysis 1 Module PE.PAS.U21.5 Multiarea reliability University, Ames,Iowa 50011, 515-294-4844, jdm@iastate.edu U21.1 Introduction Modules U19 and U20 have reliability problem, addressed in this module. In the multiarea reliability problem, we view the electric

  18. datamanagementgroup 2011 SURVEY AREA SUMMARY

    E-Print Network [OSTI]

    Toronto, University of

    % 7% 6.5 5.5 6.5 68.5 30,100 10% 5% 51% 34% 73% 17% 1% * 3% 7% 7.0 7.2 10.0 * ANCASTER AREA CITYdatamanagementgroup 2011 SURVEY AREA SUMMARY DEPARTMENT OF CIVIL ENGINEERING - UNIVERSITY OF TORONTO PREPARED BY 85 ANCASTER AREA CITY OF HAMILTON Mohawk Rd. Main St. Carluke Rd. Governors Rd. Garner

  19. datamanagementgroup 2011 SURVEY AREA SUMMARY

    E-Print Network [OSTI]

    Toronto, University of

    ,213,000 38% 13% 35% 14% 60% 14% 16% 1% 7% 2% 5.7 4.1 6.6 30.0 TRIPS MADE TO TTS AREA 3,168,200 23.5% 51% 22datamanagementgroup 2011 SURVEY AREA SUMMARY DEPARTMENT OF CIVIL ENGINEERING - UNIVERSITY OF TORONTO PREPARED BY 5 GREATER TORONTO HAMILTON AREA Durham Region Peel Region City of Hamilton City

  20. Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States

    E-Print Network [OSTI]

    Stadler, Michael

    2009-01-01

    Distributed Energy Resource Characterizations”, National Renewable EnergyDelivery and Energy Reliability’s Renewable and Distributed

  1. Kodiak Area Management Reports, 19242010 Kodiak Area Management Reports, 19242010

    E-Print Network [OSTI]

    367 Kodiak Area Management Reports, 1924­2010 APPENDIX 4 Kodiak Area Management Reports, 1924­2010 1924: Fred R. Lucas. Report of Kodiak-Afognak Fish- eries District to August 31, 1924. U.S. Bureau of Fisheries, Afognak, AK (5 September 1924). 8 p. 1924: Fred R. Lucas. Report of Kodiak-Afognak Dis- trict

  2. Communication in Home Area Networks

    E-Print Network [OSTI]

    Wang, Yubo

    2012-01-01

    and implementation of smart home energy management systemsStandard Technologies for Smart Home Area Networks EnablingInteroperability framework for smart home systems”, Consumer

  3. Electric Power Infrastructure Reliability and Security (EPIRS) Reseach and Development Initiative

    SciTech Connect (OSTI)

    Rick Meeker; L. Baldwin; Steinar Dale; Alexander Domijan; Davild Larbalestier; Hui Li; Peter McLaren; Sastry Pamidi; Horatio Rodrigo; Michael Steurer

    2010-03-31

    Power systems have become increasingly complex and face unprecedented challenges posed by population growth, climate change, national security issues, foreign energy dependence and an aging power infrastructure. Increased demand combined with increased economic and environmental constraints is forcing state, regional and national power grids to expand supply without the large safety and stability margins in generation and transmission capacity that have been the rule in the past. Deregulation, distributed generation, natural and man-made catastrophes and other causes serve to further challenge and complicate management of the electric power grid. To meet the challenges of the 21st century while also maintaining system reliability, the electric power grid must effectively integrate new and advanced technologies both in the actual equipment for energy conversion, transfer and use, and in the command, control, and communication systems by which effective and efficient operation of the system is orchestrated - in essence, the 'smart grid'. This evolution calls for advances in development, integration, analysis, and deployment approaches that ultimately seek to take into account, every step of the way, the dynamic behavior of the system, capturing critical effects due to interdependencies and interaction. This approach is necessary to better mitigate the risk of blackouts and other disruptions and to improve the flexibility and capacity of the grid. Building on prior Navy and Department of Energy investments in infrastructure and resources for electric power systems research, testing, modeling, and simulation at the Florida State University (FSU) Center for Advanced Power Systems (CAPS), this project has continued an initiative aimed at assuring reliable and secure grid operation through a more complete understanding and characterization of some of the key technologies that will be important in a modern electric system, while also fulfilling an education and outreach mission to provide future energy workforce talent and support the electric system stakeholder community. Building upon and extending portions of that research effort, this project has been focused in the following areas: (1) Building high-fidelity integrated power and controls hardware-in-the-loop research and development testbed capabilities (Figure 1). (2) Distributed Energy Resources Integration - (a) Testing Requirements and Methods for Fault Current Limiters, (b) Contributions to the Development of IEEE 1547.7, (c) Analysis of a STATCOM Application for Wind Resource Integration, (d) Development of a Grid-Interactive Inverter with Energy Storage Elements, (e) Simulation-Assisted Advancement of Microgrid Understanding and Applications; (3) Availability of High-Fidelity Dynamic Simulation Tools for Grid Disturbance Investigations; (4) HTS Material Characterization - (a) AC Loss Studies on High Temperature Superconductors, (b) Local Identification of Current-Limiting Mechanisms in Coated Conductors; (5) Cryogenic Dielectric Research; and (6) Workshops, education, and outreach.

  4. Diversity combining in laser Doppler vibrometry for improved signal reliability

    SciTech Connect (OSTI)

    Dräbenstedt, Alexander

    2014-05-27

    Because of the speckle nature of the light reflected from rough surfaces the signal quality of a vibrometer suffers from varying signal power. Deep signal outages manifest themselves as noise bursts and spikes in the demodulated velocity signal. Here we show that the signal quality of a single point vibrometer can be substantially improved by diversity reception. This concept is widely used in RF communication and can be transferred into optical interferometry. When two statistically independent measurement channels are available which measure the same motion on the same spot, the probability for both channels to see a signal drop-out at the same time is very low. We built a prototype instrument that uses polarization diversity to constitute two independent reception channels that are separately demodulated into velocity signals. Send and receive beams go through different parts of the aperture so that the beams can be spatially separated. The two velocity channels are mixed into one more reliable signal by a PC program in real time with the help of the signal power information. An algorithm has been developed that ensures a mixing of two or more channels with minimum resulting variance. The combination algorithm delivers also an equivalent signal power for the combined signal. The combined signal lacks the vast majority of spikes that are present in the raw signals and it extracts the true vibration information present in both channels. A statistical analysis shows that the probability for deep signal outages is largely decreased. A 60 fold improvement can be shown. The reduction of spikes and noise bursts reduces the noise in the spectral analysis of vibrations too. Over certain frequency bands a reduction of the noise density by a factor above 10 can be shown.

  5. RELIABILITY BASED DESIGN OF FIXED FOUNDATION WIND TURBINES

    SciTech Connect (OSTI)

    Nichols, R.

    2013-10-14

    Recent analysis of offshore wind turbine foundations using both applicable API and IEC standards show that the total load demand from wind and waves is greatest in wave driven storms. Further, analysis of overturning moment loads (OTM) reveal that impact forces exerted by breaking waves are the largest contributor to OTM in big storms at wind speeds above the operating range of 25 m/s. Currently, no codes or standards for offshore wind power generators have been adopted by the Bureau of Ocean Energy Management Regulation and Enforcement (BOEMRE) for use on the Outer Continental Shelf (OCS). Current design methods based on allowable stress design (ASD) incorporate the uncertainty in the variation of loads transferred to the foundation and geotechnical capacity of the soil and rock to support the loads is incorporated into a factor of safety. Sources of uncertainty include spatial and temporal variation of engineering properties, reliability of property measurements applicability and sufficiency of sampling and testing methods, modeling errors, and variability of estimated load predictions. In ASD these sources of variability are generally given qualitative rather than quantitative consideration. The IEC 61400‐3 design standard for offshore wind turbines is based on ASD methods. Load and resistance factor design (LRFD) methods are being increasingly used in the design of structures. Uncertainties such as those listed above can be included quantitatively into the LRFD process. In LRFD load factors and resistance factors are statistically based. This type of analysis recognizes that there is always some probability of failure and enables the probability of failure to be quantified. This paper presents an integrated approach consisting of field observations and numerical simulation to establish the distribution of loads from breaking waves to support the LRFD of fixed offshore foundations.

  6. datamanagementgroup 2011 SURVEY AREA SUMMARY

    E-Print Network [OSTI]

    Toronto, University of

    datamanagementgroup 2011 SURVEY AREA SUMMARY DEPARTMENT OF CIVIL ENGINEERING - UNIVERSITY OF TORONTO PREPARED BY 51 TOWN OF RICHMOND HILL REGIONAL MUNICIPALITY OF YORK LeslieSt. Stouffville Rd. King 6 Kilometers Area = 10,180 Hectares #12;POPULATION CHARACTERISTICS Population Age Daily

  7. Area Health Education Center of

    E-Print Network [OSTI]

    Collins, Gary S.

    Area Health Education Center of Eastern Washington Washington State University Extension's Area Health Education Center of Eastern Washington works with university and community allies to promote health for underserved and at-risk populations. It is part of a network of AHEC organiza- tions

  8. Flexibility and reliability in long-term planning exercises dedicated to the electricity sector

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Flexibility and reliability in long-term planning exercises dedicated to the electricity sector of these options. This paper focuses on the electricity sector and on problems of flexibility and reliability are assessed through the level of electrical losses they induced and a related cost. These approaches

  9. Trust Sensor Interface for Improving Reliability of EMG-based User Intent Recognition

    E-Print Network [OSTI]

    Sun, Yan Lindsay

    ) trust evaluation that dynamically evaluates the reliability of EMG sensors. Based on the output in disturbances. Each time when a disturbance is detected on an EMG sensor, the trust evaluation module is appliedTrust Sensor Interface for Improving Reliability of EMG-based User Intent Recognition Yuhong Liu

  10. Failure Correlation in Software Reliability Models Katerina Goseva Popstojanova and Kishor Trivedi

    E-Print Network [OSTI]

    Goseva-Popstojanova, Katerina

    reliability modeling framework based on Markov renewal processes which nat- urally introduces dependence among for a more flexible and consistent model formulation and solution. The Markov renewal model pre- sentedFailure Correlation in Software Reliability Models Katerina Goseva ­ Popstojanova and Kishor

  11. Maximally reliable Markov chains under energy constraints Sean Escola1,2

    E-Print Network [OSTI]

    Columbia University

    Maximally reliable Markov chains under energy constraints Sean Escola1,2 , Michael Eisele1 of Statistics Columbia University sean@neurotheory.columbia.edu, liam@stat.columbia.edu November 13, 2008 the reliability of the system. In a physical system, however, there is an energy cost associated with maintaining

  12. Wireless Reliable Messaging Protocol for Web Services (WS WRM) Sangmi Lee and Geoffrey Fox

    E-Print Network [OSTI]

    Pallickara, Sangmi

    Wireless Reliable Messaging Protocol for Web Services (WS ­WRM) Sangmi Lee and Geoffrey Fox Community Grid Laboratory, Indiana University {leesangm, gcf}@indiana.edu Abstract By employing Web services addressed for quality of services in Web services. In this paper, we propose a reliable message scheme

  13. A System for Electro-Mechanical Reliability Testing of MEMS Devices Stefan Spinner

    E-Print Network [OSTI]

    Polian, Ilia

    A System for Electro-Mechanical Reliability Testing of MEMS Devices Stefan Spinner Computer and a method that enables automated analysis of mechanical stress impact on microelectromechanical systems (MEMS). In this setup both electrical and optical inspection are available. Reliability testing

  14. ADHOC MAC: a new, flexible and reliable MAC architecture for ad-hoc networks

    E-Print Network [OSTI]

    Borgonovo, Flaminio

    ADHOC MAC: a new, flexible and reliable MAC architecture for ad-hoc networks F. Borgonovo, A, make the design of a prompt, efficient, flexible, and reliable MAC very difficult. An ad hoc network.e., transmissions that reach all terminals within the range allowed by the transmitting power. Due to radio range

  15. Combining LT codes and XOR network coding for reliable and energy efficient transmissions in

    E-Print Network [OSTI]

    Jaffrčs-Runser, Katia

    Combining LT codes and XOR network coding for reliable and energy efficient transmissions the problem of providing end to end reliable transmissions in a randomly deployed wireless sensor network or several sink nodes. Due to the large scale of such networks, the transmission is multi-hop between

  16. EPROF: An Energy/Performance/Reliability Optimization Framework for Streaming Applications

    E-Print Network [OSTI]

    Singh, Jaswinder Pal

    EPROF: An Energy/Performance/Reliability Optimization Framework for Streaming Applications Yavuz- ent energy/performance/reli-ability tradeoffs. For the StreamIt benchmarks [16], EPROF can identify challenges in si- multaneously meeting an application's energy, performance, and reliability goals. While

  17. AABBSSTTRRAACCTT MA, RUIQI. The Effect of In-Vehicle Automation and Reliability on Driver Situation

    E-Print Network [OSTI]

    Kaber, David B.

    AABBSSTTRRAACCTT MA, RUIQI. The Effect of In-Vehicle Automation and Reliability on Driver Situation by automation and in- vehicle device use. Specifically, this study investigated the implications of adaptive; investigate the effect of varying reliability of in-vehicle automation (navigation aids) on driver SA

  18. Towards Full-disclosure: Broadening Access to SCADA Data to Improve Safety, Reliability, and Security

    E-Print Network [OSTI]

    Heidemann, John

    Towards Full-disclosure: Broadening Access to SCADA Data to Improve Safety, Reliability is that openness and support for disclosure of future SCADA data can in improved safety, reliability, and security-network processing are needed to make greater openness and data sharing data viable. Today's SCADA systems are often

  19. Reliable and Energy-Efficient Routing for Static Wireless Ad Hoc Networks with Unreliable Links

    E-Print Network [OSTI]

    Wang, Yu

    Reliable and Energy-Efficient Routing for Static Wireless Ad Hoc Networks with Unreliable Links. In this paper, we address the problem of energy efficient reliable routing for wireless ad hoc networks communication, energy efficiency. Ç 1 INTRODUCTION WIRELESS ad hoc networks draw lots of attentions in recent

  20. 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 University, Hefei, Anhui 230039, China *** School of Systems, Management and Leadership, University--In current Cloud computing environments, management of data reliability has become a challenge. For data

  1. LESSONS FROM ENGINEERING: CAN SOFTWARE BENEFIT FROM PRODUCT BASED EVIDENCE OF RELIABILITY?

    E-Print Network [OSTI]

    Snooke, Neal

    LESSONS 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, Failure modes and effects analysis, Verification Abstract: This paper argues that software engineering

  2. Reliability Maps for Probabilistic Guarantees of Task Motion for Robotic Manipulators

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    Full paper Reliability Maps for Probabilistic Guarantees of Task Motion for Robotic Manipulators March 2012 Abstract 10There are many applications for which reliable and safe robots are desired. For example, assistant robots for disabled or elderly people and surgical robots are required to be safe

  3. Reliable and energy efficient cooperative detection in wireless sensor Fatma Bouabdallah a,b,d,

    E-Print Network [OSTI]

    Boutaba, Raouf

    to the fusion center. Finally and as a third main contribution, we balance detection reliability and energyReliable and energy efficient cooperative detection in wireless sensor networks Fatma Bouabdallah a online 14 December 2012 Keywords: Wireless sensor networks Energy conservation Routing for signal

  4. Cost and Reliability Considerations in Designing the Next-Generation IP over WDM Backbone Networks

    E-Print Network [OSTI]

    Greenberg, Albert

    Cost and Reliability Considerations in Designing the Next-Generation IP over WDM Backbone Networks of the cost and reliability considerations involved in designing the next-generation backbone network. Our cost of the network. Hence, a fundamental redesign of the backbone network which avoids such redundant

  5. 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 savings over time. As BC Hydro increases its DSM initiatives to meet the Clean Energy Act objective

  6. Issues in the Next Generation of Dependability Standards Existing IEEE software reliability standards do not

    E-Print Network [OSTI]

    Lyu, Michael R.

    systems. The extant software reliability standards and practices, using IEEE 982 [1] and AIAA R013 [2Issues in the Next Generation of Dependability Standards Abstract Existing IEEE software, these standards do not consider both hardware and software reliability nor do they include availability

  7. Rational design spectra for structural reliability assessment using the response spectrum method

    E-Print Network [OSTI]

    Baker, Jack W.

    Rational design spectra for structural reliability assessment using the response spectrum method" associated with a structural reliability assessment is a rational choice for a design spectrum. When structural response from any of the spectra for design checks. This observation is used to justify the CMS

  8. Using Bayesian Belief Networks to Predict the Reliability of Military Vehicles

    E-Print Network [OSTI]

    Neil, Martin

    of predictive accuracy DERA's previous generation of reliability evaluation methods were found to be optimistic a feasibility study with the Centre for Software Reliability (CSR) at City University to investigate whether, using design and process capability evidence, is one way of improving predictions and positively

  9. TSV Stress-aware Full-Chip Mechanical Reliability Analysis and Optimization for 3D IC

    E-Print Network [OSTI]

    Lim, Sung Kyu

    TSV Stress-aware Full-Chip Mechanical Reliability Analysis and Optimization for 3D IC Moongon Jung1 and accurate full-chip thermo- mechanical stress and reliability analysis tool and design optimiza- tion-mechanical stress induced by TSVs in conjunction with various associated structures such as landing pad

  10. Software Reliability S. R. Dalal, M.R. Lyu, C. L. Mallows

    E-Print Network [OSTI]

    Lyu, Michael R.

    Software Reliability by S. R. Dalal, M.R. Lyu, C. L. Mallows Bellcore, Lucent Technologies, AT&T Research 1. Introduction The demand for complex software systems has increased more rapidly than the ability to design, implement, test, and maintain them, and the reliability of software systems has become

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

    E-Print Network [OSTI]

    Amin, S. Massoud

    1 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 and Italy in 2003 underscored electricity infrastructure's vulnerabilities [1-11]. This vital yet complex

  12. The Economic Value of Improving the Reliability of Supply on a Bulk Power Transmission Network

    E-Print Network [OSTI]

    The Economic Value of Improving the Reliability of Supply on a Bulk Power Transmission Network Economics and Management and School of Electrical and Computer Engineering Cornell University Abstract, there is no established way of measuring the economic value of reliability, and as a result, regulators have adopted

  13. A Linux-Governor Based Dynamic Reliability Manager for Android Mobile Devices

    E-Print Network [OSTI]

    Simunic, Tajana

    of a device over time [8]. Reliability can be determined by monitoring voltage and temperature. Recent work) and Bias Temperature Insta- bility (BTI). Degradation depends on voltage and temperature stress depends on temperature and volt- age, a runtime control is needed to correctly manage the reliability

  14. RELIABILITY, AVAILABILITY, AND SERVICEABILITY FOR PETASCALE HIGH-END COMPUTING AND BEYOND

    SciTech Connect (OSTI)

    Chokchai "Box" Leangsuksun

    2011-05-31

    Our project is a multi-institutional research effort that adopts interplay of RELIABILITY, AVAILABILITY, and SERVICEABILITY (RAS) aspects for solving resilience issues in highend scientific computing in the next generation of supercomputers. results lie in the following tracks: Failure prediction in a large scale HPC; Investigate reliability issues and mitigation techniques including in GPGPU-based HPC system; HPC resilience runtime & tools.

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

    E-Print Network [OSTI]

    Suzuki, Jun

    energy consumption. Existing work consid- ers reliability, timeliness and energy consumption largely that are distributed spatially such as fire spread- ing and oil spills. Due to the sheer number of sensor nodes units for an event detection while minimizing energy consumption. Existing work considers reliability

  16. CRBcast: A Collaborative Rateless Scheme for Reliable and Energy-Efficient Broadcasting in Wireless Sensor

    E-Print Network [OSTI]

    Rahnavard, Nazanin

    Sensor Networks Nazanin Rahnavard School of Electrical and Computer Engineering Georgia Institute in reliability and energy efficiency of the broadcasting scheme for multi-hop wireless sensor networks. Our two, theory. design Keywords Wireless sensor networks, broadcasting, reliability, energy efficiency, rateless

  17. PV INVERTER PERFORMANCE AND RELIABILITY: WHAT IS THE ROLE OF THE IGBT?

    E-Print Network [OSTI]

    PV INVERTER PERFORMANCE AND RELIABILITY: WHAT IS THE ROLE OF THE IGBT? Robert Kaplar 1 , Reinhard the role of component failures in PV performance and reliability. Although there is no consensus these electronic components and to determine the underlying causes of inverter failures. The typical PV inverter

  18. Compatibility Study of Compile-Time Optimizations for Power and Reliability

    E-Print Network [OSTI]

    systems performance. However, for a wide range of today's power restricted, battery oper- ated embedded, reliability is the most significant design issue. Moreover, the limited battery capacities of such devices, the instruction flow at run- time can be adjusted to achieve a desirable trade-off between reliability, power

  19. Before Mapping After Mapping Area Power Area Delay Power

    E-Print Network [OSTI]

    Pedram, Massoud

    32 Exam- ples Before Mapping After Mapping Area Power Area Delay Power 5xp1 0.93 0.98 0.86 0.82 0 1.01 1.01 1.02 1.07 0.99 duke2 1.01 1.01 0.99 1.13 0.97 e64 1.00 0.51 0.83 1.16 0.50 ex5 0.99 0.89 0.99 0.92 0.96 1.05 0.90 Table 2: Area, delay and power statistics for power script (normalized

  20. Utility-scale grid-tied PV inverter reliability workshop summary report.

    SciTech Connect (OSTI)

    Granata, Jennifer E.; Quintana, Michael A.; Tasca, Coryne Adelle; Atcitty, Stanley

    2011-07-01

    A key to the long-term success of the photovoltaic (PV) industry is confidence in the reliability of PV systems. Inverters are the most commonly noted cause of PV system incidents triggered in the field. While not all of these incidents are reliability-related or even necessarily failures, they still result in a loss of generated power. With support from the U.S. Department of Energy's Solar Energy Technologies Program, Sandia National Laboratories organized a Utility-Scale Grid-Tied Inverter Reliability Workshop in Albuquerque, New Mexico, January 27-28, 2011. The workshop addressed the reliability of large (100-kilowatt+) grid-tied inverters and the implications when such inverters fail, evaluated inverter codes and standards, and provided discussion about opportunities to enhance inverter reliability. This report summarizes discussions and presentations from the workshop and identifies opportunities for future efforts.

  1. Switchover software reliability estimate for Paducah Freezer/Sublimer computer systems

    SciTech Connect (OSTI)

    Flanagan, D.M.; Davis, J.N.

    1993-04-01

    K-25 Engineering Division purchased a series of redundant computer systems and developed software for the purpose of providing continuous process monitoring and control for the Freezer/Sublimer equipment in the gaseous diffusion process at the Paducah Gaseous Diffusion Plant. The application software is loaded on two central processing units (CPU) so that in the event of a failure of the primary unit, the processing can switch to the backup unit and continue processing without error. It is the purpose of this document to demonstrate the reliability of this system with respect to its ability to switch properly between redundant CPU. The total reliability estimation problem -- which considers the computer hardware, the operating system software, and the application software -- has been reduced to one that considers only the application software directly involved in the switchover process. Estimates are provided for software reliability and the testing coverage. Software and hardware reliability models and reliability growth models are considered in addition to Bayesian approaches.

  2. Reliability assessment of Indian Point Unit 3 containment structure under combined loads

    SciTech Connect (OSTI)

    Hwang, H.; Shinozuka, M.; Kawakami, J.; Reich, M.

    1984-01-01

    In the current design criteria, the load combinations specified for design of concrete containment structures are in the deterministic format. However, by applying the probability-based reliability analysis method developed by BNL to the concrete containment structures designed according to the criteria, it is possible to evaluate the reliability levels implied in the current design criteria. For this purpose, the reliability analysis is applied to the Indian Point Unit No. 3 containment. The details of the containment structure such as the geometries and the rebar arrangements, etc., are taken from the working drawings and the Final Safety Analysis Report. Three kinds of loads are considered in the reliability analysis. They are, dead load, accidental pressure due to a large LOCA, and earthquake ground acceleration. This paper presents the reliability analysis results of the Indian Point Unit 3 containment subjected to all combinations of loads.

  3. EPRI/NRC-RES fire human reliability analysis guidelines.

    SciTech Connect (OSTI)

    Lewis, Stuart R.; Cooper, Susan E.; Najafi, Bijan; Collins, Erin; Hannaman, Bill; Kohlhepp, Kaydee; Grobbelaar, Jan; Hill, Kendra; Hendrickson, Stacey M. Langfitt; Forester, John Alan; Julius, Jeff

    2010-03-01

    During the 1990s, the Electric Power Research Institute (EPRI) developed methods for fire risk analysis to support its utility members in the preparation of responses to Generic Letter 88-20, Supplement 4, 'Individual Plant Examination - External Events' (IPEEE). This effort produced a Fire Risk Assessment methodology for operations at power that was used by the majority of U.S. nuclear power plants (NPPs) in support of the IPEEE program and several NPPs overseas. Although these methods were acceptable for accomplishing the objectives of the IPEEE, EPRI and the U.S. Nuclear Regulatory Commission (NRC) recognized that they required upgrades to support current requirements for risk-informed, performance-based (RI/PB) applications. In 2001, EPRI and the USNRC's Office of Nuclear Regulatory Research (RES) embarked on a cooperative project to improve the state-of-the-art in fire risk assessment to support a new risk-informed environment in fire protection. This project produced a consensus document, NUREG/CR-6850 (EPRI 1011989), entitled 'Fire PRA Methodology for Nuclear Power Facilities' which addressed fire risk for at power operations. NUREG/CR-6850 developed high level guidance on the process for identification and inclusion of human failure events (HFEs) into the fire PRA (FPRA), and a methodology for assigning quantitative screening values to these HFEs. It outlined the initial considerations of performance shaping factors (PSFs) and related fire effects that may need to be addressed in developing best-estimate human error probabilities (HEPs). However, NUREG/CR-6850 did not describe a methodology to develop best-estimate HEPs given the PSFs and the fire-related effects. In 2007, EPRI and RES embarked on another cooperative project to develop explicit guidance for estimating HEPs for human failure events under fire generated conditions, building upon existing human reliability analysis (HRA) methods. This document provides a methodology and guidance for conducting a fire HRA. This process includes identification and definition of post-fire human failure events, qualitative analysis, quantification, recovery, dependency, and uncertainty. This document provides three approaches to quantification: screening, scoping, and detailed HRA. Screening is based on the guidance in NUREG/CR-6850, with some additional guidance for scenarios with long time windows. Scoping is a new approach to quantification developed specifically to support the iterative nature of fire PRA quantification. Scoping is intended to provide less conservative HEPs than screening, but requires fewer resources than a detailed HRA analysis. For detailed HRA quantification, guidance has been developed on how to apply existing methods to assess post-fire fire HEPs.

  4. AREA

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

    or if they need to add this to their audit they have performed yearly by a public accounting firm. 316 audits are essentially A-133 audits for for-profit entities. They DO...

  5. Communication in Home Area Networks

    E-Print Network [OSTI]

    Wang, Yubo

    2012-01-01

    21] ZigBee Alliance. "ZigBee Smart Energy V2.0”, 2011 [22]Secure remote access to Smart Energy Home area Networks”,Density HEMS SEP Smart Energy Profile HV Home Energy

  6. Progress Update: M Area Closure

    ScienceCinema (OSTI)

    Cody, Tom

    2012-06-14

    A progress update of the Recovery Act at work at the Savannah River Site. The celebration of the first area cleanup completion with the help of the Recovery Act.

  7. Security Area Vouching and Piggybacking

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

    2000-06-05

    Establishes requirements for the Department of Energy (DOE) Security Area practice of "vouching" or "piggybacking" access by personnel. DOE N 251.40, dated 5-3-01, extends this directive until 12-31-01.

  8. Wind energy Computerized Maintenance Management System (CMMS) : data collection recommendations for reliability analysis.

    SciTech Connect (OSTI)

    Peters, Valerie A.; Ogilvie, Alistair B.

    2012-01-01

    This report addresses the general data requirements for reliability analysis of fielded wind turbines and other wind plant equipment. The report provides a rationale for why this data should be collected, a list of the data needed to support reliability and availability analysis, and specific data recommendations for a Computerized Maintenance Management System (CMMS) to support automated analysis. This data collection recommendations report was written by Sandia National Laboratories to address the general data requirements for reliability analysis of operating wind turbines. This report is intended to help develop a basic understanding of the data needed for reliability analysis from a Computerized Maintenance Management System (CMMS) and other data systems. The report provides a rationale for why this data should be collected, a list of the data needed to support reliability and availability analysis, and specific recommendations for a CMMS to support automated analysis. Though written for reliability analysis of wind turbines, much of the information is applicable to a wider variety of equipment and analysis and reporting needs. The 'Motivation' section of this report provides a rationale for collecting and analyzing field data for reliability analysis. The benefits of this type of effort can include increased energy delivered, decreased operating costs, enhanced preventive maintenance schedules, solutions to issues with the largest payback, and identification of early failure indicators.

  9. Variable area fuel cell cooling

    DOE Patents [OSTI]

    Kothmann, Richard E. (Churchill Borough, PA)

    1982-01-01

    A fuel cell arrangement having cooling fluid flow passages which vary in surface area from the inlet to the outlet of the passages. A smaller surface area is provided at the passage inlet, which increases toward the passage outlet, so as to provide more uniform cooling of the entire fuel cell. The cooling passages can also be spaced from one another in an uneven fashion.

  10. Multi-area network analysis 

    E-Print Network [OSTI]

    Zhao, Liang

    2005-02-17

    -1 MULTI-AREA NETWORK ANALYSIS A Dissertation by LIANG ZHAO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY... December 2004 Major Subject: Electrical Engineering MULTI-AREA NETWORK ANALYSIS A Dissertation by LIANG ZHAO Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR...

  11. Report on the analysis of field data relating to the reliability of solar hot water systems.

    SciTech Connect (OSTI)

    Menicucci, David F.

    2011-07-01

    Utilities are overseeing the installations of thousand of solar hot water (SHW) systems. Utility planners have begun to ask for quantitative measures of the expected lifetimes of these systems so that they can properly forecast their loads. This report, which augments a 2009 reliability analysis effort by Sandia National Laboratories (SNL), addresses this need. Additional reliability data have been collected, added to the existing database, and analyzed. The results are presented. Additionally, formal reliability theory is described, including the bathtub curve, which is the most common model to characterize the lifetime reliability character of systems, and for predicting failures in the field. Reliability theory is used to assess the SNL reliability database. This assessment shows that the database is heavily weighted with data that describe the reliability of SHW systems early in their lives, during the warranty period. But it contains few measured data to describe the ends of SHW systems lives. End-of-life data are the most critical ones to define sufficiently the reliability of SHW systems in order to answer the questions that the utilities pose. Several ideas are presented for collecting the required data, including photometric analysis of aerial photographs of installed collectors, statistical and neural network analysis of energy bills from solar homes, and the development of simple algorithms to allow conventional SHW controllers to announce system failures and record the details of the event, similar to how aircraft black box recorders perform. Some information is also presented about public expectations for the longevity of a SHW system, information that is useful in developing reliability goals.

  12. Research Areas | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Stewardship Science Academic Alliances Research Areas Research Areas Properties of Materials under Extreme Conditions and Hydrodynamics During open solicitations research...

  13. Quantifying the Operational Benefits of Conventional and Advanced Pumped Storage Hydro on Reliability and Efficiency: Preprint

    SciTech Connect (OSTI)

    Krad, I.; Ela, E.; Koritarov, V.

    2014-07-01

    Pumped storage hydro (PSH) plants have significant potential to provide reliability and efficiency benefits in future electric power systems with high penetrations of variable generation. New PSH technologies, such as adjustable-speed PSH, have been introduced that can also present further benefits. This paper demonstrates and quantifies some of the reliability and efficiency benefits afforded by PSH plants by utilizing the Flexible Energy Scheduling Tool for the Integration of Variable generation (FESTIV), an integrated power system operations tool that evaluates both reliability and production costs.

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

    SciTech Connect (OSTI)

    Fisher, Emily; Eto, Joseph H.; LaCommare, Kristina Hamachi

    2011-10-19

    Bulk power system reliability is of critical importance to the electricity sector. Complete and accurate information on events affecting the bulk power system is essential for assessing trends and efforts to maintain or improve reliability. Yet, current sources of this information were not designed with these uses in mind. They were designed, instead, to support real-time emergency notification to industry and government first-responders. This paper reviews information currently collected by both industry and government sources for this purpose and assesses factors that might affect their usefulness in supporting the academic literature that has relied upon them to draw conclusions about the reliability of the US electric power system.

  15. Abstract--This paper reports on work the Consortium for Electric Reliability Technology Solutions (CERTS) has been

    E-Print Network [OSTI]

    of the New York Public Servic Reliability Technology Solutions on behalf of the U.S. Department of Energy's Transmission Reliability program. The work was funded by the Assistant Secretary of Energy Efficiency and Renewable Energy, Office of Power

  16. COUPLING CONSTRAINT BOUNDARY MAPPING IN THE PROCESS DESIGN PARAMETER SPACE WITH COMMERCIAL PROCESS SIMULATOR TO ESTIMATE PROCESS DESIGN RELIABILITY

    E-Print Network [OSTI]

    Myers, Elim Rosalva

    2010-01-25

    design and an evaluation of the safety factor effectiveness in increasing reliability would identify which equipment is unnecessarily oversized, which is critically undersized and which uncertainties are the principal contributors to low reliability...

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

    E-Print Network [OSTI]

    Fisher, Emily

    2012-01-01

    power system SAIFI and SAIDI using NERC and DOE reliabilityInterruption Duration Index (SAIDI) are two common metricsa given period of time. SAIDI measures how long the average

  18. A chronological probabilistic production cost model to evaluate the reliability contribution of limited energy plants

    E-Print Network [OSTI]

    Leung, Tommy (Tommy Chun Ting)

    2012-01-01

    The growth of renewables in power systems has reinvigorated research and regulatory interest in reliability analysis algorithms such as the Baleriaux/Booth convolution-based probabilistic production cost (PPC) model. ...

  19. Reliability Analysis of Electric Power Systems Using an Object-oriented Hybrid Modeling Approach

    E-Print Network [OSTI]

    Schläpfer, Markus; Kröger, Wolfgang

    2012-01-01

    The ongoing evolution of the electric power systems brings about the need to cope with increasingly complex interactions of technical components and relevant actors. In order to integrate a more comprehensive spectrum of different aspects into a probabilistic reliability assessment and to include time-dependent effects, this paper proposes an object-oriented hybrid approach combining agent-based modeling techniques with classical methods such as Monte Carlo simulation. Objects represent both technical components such as generators and transmission lines and non-technical components such as grid operators. The approach allows the calculation of conventional reliability indices and the estimation of blackout frequencies. Furthermore, the influence of the time needed to remove line overloads on the overall system reliability can be assessed. The applicability of the approach is demonstrated by performing simulations on the IEEE Reliability Test System 1996 and on a model of the Swiss high-voltage grid.

  20. Probabilistic risk analysis of restructured electric power systems : implications for reliability analysis and policies

    E-Print Network [OSTI]

    Felder, Frank Andrew

    2001-01-01

    Modem society requires reliable and safe operation of its infrastructure. Policymakers believe that, in many industries, competitive markets and regulatory incentives will result in system performance superior to that under ...

  1. Integration of renewable energy sources: reliability-constrained power system planning and operations using computational intelligence 

    E-Print Network [OSTI]

    Wang, Lingfeng

    2009-05-15

    studied in the dissertation include reliability evaluation of power systems with time-dependent energy sources, multi-objective design of hybrid generation systems, risk and cost tradeoff in economic dispatch with wind power penetration, optimal placement...

  2. Reliable and efficient PUF-based key generation using pattern matching

    E-Print Network [OSTI]

    Paral, Zdenek (Sid)

    We describe a novel and efficient method to reliably provision and re-generate a finite and exact sequence of bits, for use with cryptographic applications, e.g., as a key, by employing one or more challengeable Physical ...

  3. Suspect Mycoplasma contamination in your cell culture? Quick and reliable testing service.

    E-Print Network [OSTI]

    Banaji,. Murad

    Suspect Mycoplasma contamination in your cell culture? Quick and reliable testing service. Surveys are contaminated with Mycoplasma. Unlike other bacterial contaminations, the presence of Mycoplasma often goes, Mycoplasma contamination will at best compromise, and at worst invalidate experimental results, wasting

  4. Failure Analysis and Reliability Model Development for Microsystems-Enabled Photovoltaics

    E-Print Network [OSTI]

    Failure Analysis and Reliability Model Development for Microsystems- Enabled Photovoltaics Benjamin, 87185, USA Abstract -- Microsystems-enabled photovoltaics (MEPV) has great potential to meet increasing demands for light-weight, photovoltaic solutions with high power density and efficiency. This paper

  5. Reliability Evaluation of Composite Power Systems Including the Effects of Hurricanes 

    E-Print Network [OSTI]

    Liu, Yong

    2011-02-22

    Adverse weather such as hurricanes can significantly affect the reliability of composite power systems. Predicting the impact of hurricanes can help utilities for better preparedness and make appropriate restoration arrangements...

  6. Reliability Analysis of Settlement Using an Updated Probabilistic Unified Soil Compression Model 

    E-Print Network [OSTI]

    Ambrose, Avery

    2012-02-14

    unified soil compression model. The model is then used to estimate the settlement of an embankment. Lastly, a reliability analysis of settlement is carried out on the settlement estimate of the embankment. The new probabilistic unified soil compression...

  7. An integrated methodology for the performance and reliability evaluation of fault-tolerant systems

    E-Print Network [OSTI]

    Domínguez-García, Alejandro D. (Alejandro Dan)

    2007-01-01

    This thesis proposes a new methodology for the integrated performance and reliability evaluation of embedded fault-tolerant systems used in aircraft, space, tactical, and automotive applications. This methodology uses a ...

  8. Evaluation of the use of engineering judgements applied to analytical human reliablity analysis methods (HRA) 

    E-Print Network [OSTI]

    Kohlhepp, Katherine D.

    2006-04-12

    AFW Auxiliary Feed Water BOP Balance of Plant BWR Boiling Water Reactor CBDTM Caused Based Decision Tree Method CREAM Cognitive Reliability and Error Analysis Method CPSES Comanche Peak Steam Electric Station CR Control Room CRS Control...

  9. Reliability Modeling and Simulation of Composite Power Systems with Renewable Energy Resources and Storage 

    E-Print Network [OSTI]

    Kim, Hagkwen

    2013-05-24

    This research proposes an efficient reliability modeling and simulation methodology in power systems to include photovoltaic units, wind farms and storage. Energy losses by wake effect in a wind farm are incorporated. Using the wake model, wind...

  10. Reliability of the Optimized Perturbation Theory for scalar fields at finite temperature

    SciTech Connect (OSTI)

    Farias, R. L.; Teixeira, D. L. Jr.; Ramos, R. O.

    2013-03-25

    The thermodynamics of a massless scalar field with a quartic interaction is studied up to third order in the Optimized Perturbation Theory (OPT) method. A comparison with other nonperturbative approaches is performed such that the reliability of OPT is accessed.

  11. Reliability and energy-efficiency in wireless ad-hoc networks

    E-Print Network [OSTI]

    Srinivas, Anand, 1979-

    2004-01-01

    In this thesis, we address issues related to reliability and energy-efficiency in wireless ad hoc networks. In the first part of the work, we deal with the problem of simultaneously routing data along multiple disjoint ...

  12. Agenda for the PV Module Reliability Workshop, February 26- 27 2013, Golden, Colorado

    Office of Energy Efficiency and Renewable Energy (EERE)

    This document is the agenda and poster session information for the NREL 2013 Photovoltaic Module Reliability Workshop, held on February 26-27, 2013 at the National Renewable Energy Laboratory in Golden, CO.

  13. Utilizing Load Response for Wind and Solar Integration and Power System Reliability

    SciTech Connect (OSTI)

    Milligan, M.; Kirby, B.

    2010-07-01

    Responsive load is still the most underutilized reliability resource in North America. This paper examines the characteristics of concern to the power system, the renewables, and to the loads.

  14. Effects of mechanical properties on the reliability of Cu/low-k metallization systems

    E-Print Network [OSTI]

    Wei, Frank L. (Frank Lili), 1977-

    2007-01-01

    Cu and low-dielectric-constant (k) metallization schemes are critical for improved performance of integrated circuits. However, low elastic moduli, a characteristic of the low-k materials, lead to significant reliability ...

  15. Reliably Diagnosing Fraser River Sockeye Salmon Declines in a Variable World

    E-Print Network [OSTI]

    Reliably Diagnosing Fraser River Sockeye Salmon Declines in a Variable World by Faye d diagnosing Fraser River sockeye salmon declines in a variable world Report No.: 564 Examining Committee

  16. Estimation of the reliability of space nuclear power systems by probabilistic risk assessment techniques 

    E-Print Network [OSTI]

    Gutner, Sophie Isabelle

    1996-01-01

    A successful space mission depends on the reliable operation of the spacecraft's electrical power system. For payloads requiring high power levels, various designs of space nuclear power systems (SNPS) are available. Designers have conducted limited...

  17. APPEARS IN IEEE INFOCOM 1999 1 Improving Reliable Multicast Using Active Parity

    E-Print Network [OSTI]

    Kasera, Sneha Kumar

    novel reliable multicast protocols that combine active repair service (a.k.a. local recovery) and parity en- coding (a.k.a. forward error correction or FEC) techniques. We show that, compared to other

  18. First Assessment of Reliability Data for the LHC Accelerator and Detector Cryogenic System Components

    E-Print Network [OSTI]

    Perinic, G; Alonso-Canella, I; Balle, C; Barth, K; Bel, J F; Benda, V; Bremer, J; Brodzinski, K; Casas-Cubillos, J; Cuccuru, G; Cugnet, M; Delikaris, D; Delruelle, N; Dufay-Chanat, L; Fabre, C; Ferlin, G; Fluder, C; Gavard, E; Girardot, R; Haug, F; Herblin, L; Junker, S; Klabi , T; Knoops, S; Lamboy, J P; Legrand, D; Metselaar, J; Park, A; Perin, A; Pezzetti, M; Penacoba-Fernandez, G; Pirotte, O; Rogez, E; Suraci, A; Stewart, L; Tavian, L J; Tovar-Gonzalez, A; Van Weelderen, R; Vauthier, N; Vullierme, B; Wagner, U

    2012-01-01

    The Large Hadron Collider (LHC) cryogenic system comprises eight independent refrigeration and distribution systems that supply the eight 3.3 km long accelerator sectors with cryogenic refrigeration power as well as four refrigeration systems for the needs of the detectors ATLAS and CMS. In order to ensure the highest possible reliability of the installations, it is important to apply a reliability centred approach for the maintenance. Even though large scale cryogenic refrigeration exists since the mid 20th century, very little third party reliability data is available today. CERN has started to collect data with its computer aided maintenance management system (CAMMS) in 2009, when the accelerator has gone into normal operation. This paper presents the reliability observations from the operation and the maintenance side, as well as statistical data collected by the means of the CAMMS system.

  19. Achieving A Long Term Business Impact by Improving the Energy Effectiveness and Reliability of Electric Motors 

    E-Print Network [OSTI]

    Whelan, C. D.

    1997-01-01

    Over 100,000 electric motors drive the production equipment throughout a large chemical company. The energy-efficiency and reliability of these motors during their entire life have a decided impact on the company's manufacturing costs and production...

  20. Araneola: A Scalable Reliable Multicast System for Dynamic Environments Roie Melamed

    E-Print Network [OSTI]

    Keidar, Idit

    is called churn. A ma- jor design goal for our work is therefore coping efficiently with churn. Specifically service to nodes that are up despite high churn rates. We present Araneola, a scalable reliable