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Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
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1

RESEARCH ARTICLE Empirical assessment of short-term variability from  

E-Print Network (OSTI)

RESEARCH ARTICLE Empirical assessment of short-term variability from utility-scale solar PV plants grid because additional system resources are required to maintain the grid's reliability. In this study-term variability; PV plant ramp rate; daily aggregate ramp rate; inverter shells *Correspondence Rob van Haaren

2

Reliability Assessment of North American Steam Turbines  

Science Conference Proceedings (OSTI)

This survey provides statistics related to the reliability and maintenance of fossil-fueled steam turbines in the continental United States. The analysis focuses primarily on active turbines larger than 200 MW.

2002-04-24T23:59:59.000Z

3

Reliability Assessment of SMART Reactor Protection System  

Science Conference Proceedings (OSTI)

Component failure rates and integrated system reliability of the SMART reactor protection system were analyzed. The analysis tool of the study was the RELEX 7 computer program developed by Relex Software Corporation. The RELEX software is a PC based computer program which includes the part stress analysis models and the RBD analysis model to calculate component and system reliability. The component failure rate data for the study was selected from the MIL-HDBK-217F. (authors)

Won Young, Yun; Choong Heui, Jeong [Korea Institute of Nuclear Safety, P. O. Box 114, Yusong Post Office, Daejeon (Korea, Republic of); Seong Hun, Kim; Sang Yong, Lee [Sam Chang Enterprise Co. LTD, 974-1, Goyen-ri, Woongchon-myon, Ulju-gun, Ulsan (Korea, Republic of)

2006-07-01T23:59:59.000Z

4

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

5

Software reliability assessment via fuzzy logic model  

Science Conference Proceedings (OSTI)

Recently in software engineering it became of great importance to be able to reason about non functional characteristics of software. This holds for a large variety of application areas like embedded and safety-critical software systems as well as service-oriented ... Keywords: fuzzy logic, fuzzy models, service oriented software systems, software reliability

Olga Georgieva; Aleksandar Dimov

2011-06-01T23:59:59.000Z

6

Assessing reliability in energy supply systems  

E-Print Network (OSTI)

Term Prospects for Natural Gas Supply. Energy Informationin coming decades, natural gas supply will increasingly facefunctional zones of natural gas supply, such as reserves and

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

2007-01-01T23:59:59.000Z

7

Assessing Reliability in Energy Supply Systems  

E-Print Network (OSTI)

Term Prospects for Natural Gas Supply. Energy Informationin coming decades, natural gas supply will increasingly facefunctional zones of natural gas supply, such as reserves and

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

2008-01-01T23:59:59.000Z

8

Structural reliability analysis and seismic risk assessment  

SciTech Connect

This paper presents a reliability analysis method for safety evaluation of nuclear structures. By utilizing this method, it is possible to estimate the limit state probability in the lifetime of structures and to generate analytically the fragility curves for PRA studies. The earthquake ground acceleration, in this approach, is represented by a segment of stationary Gaussian process with a zero mean and a Kanai-Tajimi Spectrum. All possible seismic hazard at a site represented by a hazard curve is also taken into consideration. Furthermore, the limit state of a structure is analytically defined and the corresponding limit state surface is then established. Finally, the fragility curve is generated and the limit state probability is evaluated. In this paper, using a realistic reinforced concrete containment as an example, results of the reliability analysis of the containment subjected to dead load, live load and ground earthquake acceleration are presented and a fragility curve for PRA studies is also constructed.

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

1984-01-01T23:59:59.000Z

9

Multi-hazard Reliability Assessment of Offshore Wind Turbines  

E-Print Network (OSTI)

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. The proposed probabilistic models are developed starting from a commonly accepted deterministic model and by adding correction terms and model errors to capture respectively, the inherent bias and the uncertainty in developed models. A Bayesian approach is then used to assess the model parameters incorporating the information from virtual experiment data. The database of virtual experiments is generated using detailed three-dimensional finite element analyses of a suite of typical offshore wind turbines. The finite element analyses properly account for the nonlinear soil-structure interaction. Separate probabilistic demand models are developed for three operational/load conditions including: (1) operating under day-to-day wind and wave loading; (2) operating throughout earthquake in presence of day-to-day loads; and (3) parked under extreme wind speeds and earthquake ground motions. The proposed approach gives special attention to the treatment of both aleatory and epistemic uncertainties in predicting the demands on the support structure of wind turbines. The developed demand models are then used to assess the reliability of the support structure of wind turbines based on the proposed damage states for typical wind turbines and their corresponding performance levels. A multi-hazard fragility surface of a given wind turbine support structure as well as the seismic and wind hazards at a specific site location are incorporated into a probabilistic framework to estimate the annual probability of failure of the support structure. Finally, a framework is proposed to investigate the performance of offshore wind turbines operating under day-to-day loads based on their availability for power production. To this end, probabilistic models are proposed to predict the mean and standard deviation of drift response of the tower. The results are used in a random vibration based framework to assess the fragility as the probability of exceeding certain drift thresholds given specific levels of wind speed.

Mardfekri Rastehkena, Maryam 1981-

2012-12-01T23:59:59.000Z

10

Reliability assessment of autonomous power systems incorporating HVDC interconnection links  

SciTech Connect

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

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

1996-01-01T23:59:59.000Z

11

Assessing reliability of substation spare current transformer system  

Science Conference Proceedings (OSTI)

This paper relates a case study involving Current Transformers (CTs) from the electrical system of the Companhia Hidro Elétrica do São Francisco (CHESF) in order to estimate the optimum number of spare. Two models have been considered in this ... Keywords: Monte Carlo simulation, current transformers, reliability assessment

Cristiano G. de Melo; Renata Maria Cardoso R. de Souza; Liliane R. B. Salgado

2012-11-01T23:59:59.000Z

12

A reliability assessment methodology for distribution systems with distributed generation  

E-Print Network (OSTI)

Reliability assessment is of primary importance in designing and planning distribution systems that operate in an economic manner with minimal interruption of customer loads. With the advances in renewable energy sources, Distributed Generation (DG), is forecasted to increase in distribution networks. The study of reliability evaluation of such networks is a relatively new area. This research presents a new methodology that can be used to analyze the reliability of such distribution systems and can be applied in preliminary planning studies for such systems. The method uses a sequential Monte Carlo simulation of the distribution systemÂ?s stochastic model to generate the operating behavior and combines that with a path augmenting Max flow algorithm to evaluate the load status for each state change of operation in the system. Overall system and load point reliability indices such as hourly loss of load, frequency of loss of load and expected energy unserved can be computed using this technique. On addition of DG in standby mode of operation at specific locations in the network, the reliability indices can be compared for different scenarios and strategies for placement of DG and their capacities can be determined using this methodology.

Duttagupta, Suchismita Sujaya

2003-05-01T23:59:59.000Z

13

ORISE 04-0115 Human Reliability Program Medical Assessments 2004  

NLE Websites -- All DOE Office Websites (Extended Search)

ORISE 04-0115 ORISE 04-0115 Office of Security U. S. Department of Energy Human Reliability Program MEDICAL ASSESSMENTS Center for Human Reliability Studies Oak Ridge Institute for Science and Education Operated by Oak Ridge Associated Universities For the U. S. Department of Energy Oak Ridge Associated Universities (ORAU) is a university consortium leveraging the scientific strength of major research institutions to advance science and education by partnering with national laboratories, government agencies, and private industry. ORAU manages the Oak Ridge Institute for Science and Education for the U.S. Department of Energy (DOE). Oak Ridge Institute for Science and Education (ORISE) is a DOE facility focusing on scientific initiatives to research health risks from occupational hazards, assess environmental cleanup, respond to radiation medical

14

Guide for Predicting Long-Term Reliability of Nuclear Power Plant Systems, Structures, and Components  

Science Conference Proceedings (OSTI)

This report provides guidelines for predicting long-term reliability of nuclear power plant systems, structures, and components. The methods described will allow life cycle management planners to make improved estimates of lost generation and revenues, which play an important role in the choice of the economically optimum long-term maintenance plan for systems and components.

2002-12-05T23:59:59.000Z

15

Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR)  

Science Conference Proceedings (OSTI)

This Reference Guide contains instructions on how to install and use Version 3.5 of the NRC-sponsored Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR). The NUCLARR data management system is contained in compressed files on the floppy diskettes that accompany this Reference Guide. NUCLARR is comprised of hardware component failure data (HCFD) and human error probability (HEP) data, both of which are available via a user-friendly, menu driven retrieval system. The data may be saved to a file in a format compatible with IRRAS 3.0 and commercially available statistical packages, or used to formulate log-plots and reports of data retrieval and aggregation findings.

Gilbert, B.G.; Richards, R.E.; Reece, W.J.; Gertman, D.I.

1992-10-01T23:59:59.000Z

16

Assessment of microelectronics packaging for high temperature, high reliability applications  

DOE Green Energy (OSTI)

This report details characterization and development activities in electronic packaging for high temperature applications. This project was conducted through a Department of Energy sponsored Cooperative Research and Development Agreement between Sandia National Laboratories and General Motors. Even though the target application of this collaborative effort is an automotive electronic throttle control system which would be located in the engine compartment, results of this work are directly applicable to Sandia`s national security mission. The component count associated with the throttle control dictates the use of high density packaging not offered by conventional surface mount. An enabling packaging technology was selected and thermal models defined which characterized the thermal and mechanical response of the throttle control module. These models were used to optimize thick film multichip module design, characterize the thermal signatures of the electronic components inside the module, and to determine the temperature field and resulting thermal stresses under conditions that may be encountered during the operational life of the throttle control module. Because the need to use unpackaged devices limits the level of testing that can be performed either at the wafer level or as individual dice, an approach to assure a high level of reliability of the unpackaged components was formulated. Component assembly and interconnect technologies were also evaluated and characterized for high temperature applications. Electrical, mechanical and chemical characterizations of enabling die and component attach technologies were performed. Additionally, studies were conducted to assess the performance and reliability of gold and aluminum wire bonding to thick film conductor inks. Kinetic models were developed and validated to estimate wire bond reliability.

Uribe, F.

1997-04-01T23:59:59.000Z

17

Consortium for Electric Reliability Technology Solutions Integrated Assessment of  

E-Print Network (OSTI)

described in this paper coordinated by the Consortium of Electricity Reliability Technology Solutions

18

DEGRADATION SUSCEPTIBILITY METRICS AS THE BASES FOR BAYESIAN RELIABILITY MODELS OF AGING PASSIVE COMPONENTS AND LONG-TERM REACTOR RISK  

Science Conference Proceedings (OSTI)

Conventional probabilistic risk assessments (PRAs) are not well-suited to addressing long-term reactor operations. Since passive structures, systems and components are among those for which refurbishment or replacement can be least practical, they might be expected to contribute increasingly to risk in an aging plant. Yet, passives receive limited treatment in PRAs. Furthermore, PRAs produce only snapshots of risk based on the assumption of time-independent component failure rates. This assumption is unlikely to be valid in aging systems. The treatment of aging passive components in PRA does present challenges. First, service data required to quantify component reliability models are sparse, and this problem is exacerbated by the greater data demands of age-dependent reliability models. A compounding factor is that there can be numerous potential degradation mechanisms associated with the materials, design, and operating environment of a given component. This deepens the data problem since the risk-informed management of materials degradation and component aging will demand an understanding of the long-term risk significance of individual degradation mechanisms. In this paper we describe a Bayesian methodology that integrates the metrics of materials degradation susceptibility being developed under the Nuclear Regulatory Commission's Proactive Management of Materials of Degradation Program with available plant service data to estimate age-dependent passive component reliabilities. Integration of these models into conventional PRA will provide a basis for materials degradation management informed by the predicted long-term operational risk.

Unwin, Stephen D.; Lowry, Peter P.; Toyooka, Michael Y.; Ford, Benjamin E.

2011-07-17T23:59:59.000Z

19

Generation reliability assessment in power markets using Monte Carlo simulation and soft computing  

Science Conference Proceedings (OSTI)

Deregulation policy has caused some changes in the concepts of power systems reliability assessment and enhancement. In the present research, generation reliability is considered, and a method for its assessment is proposed using intelligent systems. ... Keywords: Generation reliability, Intelligent systems, Monte Carlo simulation, Power pool market

H. Haroonabadi; M. -R. Haghifam

2011-12-01T23:59:59.000Z

20

Generation reliability assessment in power pool market using MCS and intelligent systems  

Science Conference Proceedings (OSTI)

Deregulation policy has caused some changes in the concepts of power systems reliability assessment and enhancement. In this paper, generation reliability is considered, and a method for its assessment using intelligent systems is proposed. Also, because ... Keywords: generation reliability, intelligent systems, monte carlo simulation, power pool market

H. Haroonabadi; M.-R. Haghifam

2008-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Reliability Assessment of a Power Grid with Customer Operated CHP Systems Using Monte Carlo Simulation.  

E-Print Network (OSTI)

??This thesis presents a method for reliability assessment of a power grid with distributed generation providing support to the system. The distributed generation units considered… (more)

Manohar, Lokesh Prakash

2009-01-01T23:59:59.000Z

22

RELIABILITY MODELS OF AGING PASSIVE COMPONENTS INFORMED BY MATERIALS DEGRADATION METRICS TO SUPPORT LONG-TERM REACTOR OPERATIONS  

Science Conference Proceedings (OSTI)

Paper describes a methodology for the synthesis of nuclear power plant service data with expert-elicited materials degradation information to estimate the future failure rates of passive components. This method should be an important resource to long-term plant operations and reactor life extension. Conventional probabilistic risk assessments (PRAs) are not well suited to addressing long-term reactor operations. Since passive structures and components are among those for which replacement can be least practical, they might be expected to contribute increasingly to risk in an aging plant; yet, passives receive limited treatment in PRAs. Furthermore, PRAs produce only snapshots of risk based on the assumption of time-independent component failure rates. This assumption is unlikely to be valid in aging systems. The treatment of aging passive components in PRA presents challenges. Service data to quantify component reliability models are sparse, and this is exacerbated by the greater data demands of age-dependent reliability models. Another factor is that there can be numerous potential degradation mechanisms associated with the materials and operating environment of a given component. This deepens the data problem since risk-informed management of component aging will demand an understanding of the long-term risk significance of individual degradation mechanisms. In this paper we describe a Bayesian methodology that integrates metrics of materials degradation susceptibility with available plant service data to estimate age-dependent passive component reliabilities. Integration of these models into conventional PRA will provide a basis for materials degradation management informed by predicted long-term operational risk.

Unwin, Stephen D.; Lowry, Peter P.; Toyooka, Michael Y.

2012-05-01T23:59:59.000Z

23

Reliability of wind power from dispersed sites: a preliminary assessment  

DOE Green Energy (OSTI)

The reliability benefit of geographically dispersed wind turbine generators is analyzed. Electricity produced from wind machines experiences wide fluctuations of output at a given site. Yet the value of electricity is a function of its reliability. Pricing schedules have traditionally valued firm power, that is, reliably available power, much more highly than ''dump power;'' that is, power which is available intermittently on an ''if and when'' basis. The conventional wisdom on wind power suggests that it is unrealistic to expect that wind generation will be sufficiently reliable to displace conventional capacity. While such conclusions may be valid for analysis of individual sites, the main thesis of this paper is that geographical dispersal improves aggregate reliability.

Kahn, E.

1978-04-01T23:59:59.000Z

24

Viability, Development, and Reliability Assessment of Coupled Coastal Forecasting Systems  

E-Print Network (OSTI)

Real-time wave forecasts are critical to a variety of coastal and offshore opera- tions. NOAA’s global wave forecasts, at present, do not extend into many coastal regions of interest. Even after more than two decades of the historical Exxon Valdez disaster, Cook Inlet (CI) and Prince William Sound (PWS) are regions that suffer from a lack of accurate wave forecast information. This dissertation develops high- resolution integrated wave forecasting schemes for these regions in order to meet the critical requirements associated with shipping, commercial and sport fishing vessel safety, and oil spill response. This dissertation also performs a detailed qualitative and quantitative assessment of the impact of various forcing functions on wave pre- dictions, and develops maps showing extreme variations in significant wave heights (SWHs). For instance, it is found that the SWH could vary by as much as 1 m in the northern CI region in the presence of currents (hence justifying the need for integration of the wave model with a circulation model). Such maps can be useful for several engineering operations, and could also serve as guidance tool as to what can be expected in certain regions. Aside from the system development, the issue of forecast reliability is also addressed for PWS region in the context of the associated uncertainty which confronts the manager of engineering operations or other planners. For this purpose, high-resolution 36-h daily forecasts of SWHs are compared with measurements from buoys and satellites for about a year. The results show that 70% of the peak SWHs in the range 5-8 m were predicted with an accuracy of 15% or less for a forecast lead time of 9 h. On average, results indicate 70% or greater likelihood of the prediction falling within a tolerance of ±(1*RMSE) for all lead times. This analysis could not be performed for CI due to lack of data sources.

Singhal, Gaurav

2011-08-01T23:59:59.000Z

25

INTEGRATING THE DESIGN AND RELIABILITY ASSESSMENT OF A HYBRID PV-THERMAL MICROCONCENTRATOR SYSTEM  

E-Print Network (OSTI)

INTEGRATING THE DESIGN AND RELIABILITY ASSESSMENT OF A HYBRID PV-THERMAL MICROCONCENTRATOR SYSTEM M that the materials from the power electronics industry are also reliable when used in a concentrator PV module and reliability testing have been integrated as concurrent processes, enabling the early optimisation

26

CERTS 2012 Program Review - Reliability Standards Analysis and Assessment - Gil Tam, EPG  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

12-13, 2012 12-13, 2012 Washington, DC FY12 DOE/CERTS Transmission Reliability R&D Internal Program Review Research Projects Reliability Standards Analysis and Assessments  Frequency Response Event Collection and Analysis  NERC Interconnections 2011 Annual Grid Reliability Performance Analysis and Report Page 1 Reliability Standards Analysis and Assessment  Objective: Support the NERC committees/groups (Resource Subcommittee and RS- Frequency Working Group) in the following ways: - Perform grid reliability metrics analysis using data collected in CERTS applications as requested by the RS - Analyze collected data to assess reliability performance at different levels - Interconnection, Reliability Coordinator, Balancing Authority - Perform analysis, testing, and monitoring of current and proposed

27

RELIABILITY OF WIND POWER FROM DISPERSED SITES: A PRELIMINARY ASSESSMENT  

E-Print Network (OSTI)

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

Kahn, E.

2011-01-01T23:59:59.000Z

28

A Bootstrap Method for Software Reliability Assessment Based on a Discretized NHPP Model  

Science Conference Proceedings (OSTI)

We discuss a bootstrap method for software reliability assessment based on a discretized no homogeneous Poisson process (NHPP) model. Ordinarily, model parameters of the discretized NHPP model are estimated by using the regression analysis based on the ... Keywords: Software reliability assessment, Discretized NHPP model, Regression analysis, Bootstrap method

Shinji Inoue; Shigeru Yamada

2012-11-01T23:59:59.000Z

29

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

E-Print Network (OSTI)

Casing has a higher risk of failure in a compacting reservoir than in a typical reservoir. Casing fails when reservoir compaction induces compression and shear stresses onto it. They compact as reservoir pressure depletes during production. High compaction reservoirs typically are composed of unconsolidated, overpressured rocks such as chalk, diatomite, and sandstone. Pore pressure depletion increases effective stress, which is the rock matrix stress pushing upward against overburden pressure. Effective stress may exceed rock compressive strength, inducing compaction. Wells in compacting reservoirs risk high failure and deformation rates. This project introduces the concept of structural reliability to quantify casing failure risks in compacting reservoirs. This research developed probabilistic models for casing capacities using current design methods and a reservoir compaction load using finite-element model simulations. Probabilistic models were used in creating two limit-states functions to predict casing failure: axial yielding and buckling failures. A limit-state function describes the casing condition as the casing experiences a reservoir compaction load. The limit state function is the input in component and system analyses for casing fragility and conditional probability of casing failure. Fragilities can predict casing probability of failure as reservoir pressure is depleting. Sensitivity and importance analyses are also performed to determine the importance of parameters affecting the casing reliability. Applying the knowledge produced from this research to casing design methods can improve design reliabilities and forecast the risk of casing failure in compacting reservoirs.

Chantose, Prasongsit

2011-12-01T23:59:59.000Z

30

Evaluation of Condition Assessment for Continued Reliable Operation  

Science Conference Proceedings (OSTI)

Fossil power plant operators face increasing complexity relative to long-range planning for existing fossil generation assets. With the increased focus to provide reliable and cost-effective power coupled with new and increasingly stringent existing environmental regulations, many power companies face difficult decisions regarding investment in aging assets, as opposed to building new generation units or providing ...

2013-04-26T23:59:59.000Z

31

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

American Electric Reliability Corporation (NERC): Reliability Considerations from the Integration of Smart Grid. NERC develops and enforces Reliability Standards; assesses...

32

Renewable Energy Cross Sectoral Assessments Terms of Reference...  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon Renewable Energy Cross Sectoral Assessments Terms of Reference Jump to: navigation, search...

33

Assessment Methods and Operating Tools for Grid Reliability: An Executive Report on the Transmission Program of EPRI's Power Deliver y Reliability Initiative  

Science Conference Proceedings (OSTI)

Maintaining a high level of power grid reliability is one of the most pressing issues facing the electric power industry today. This report summarizes the achievements and planned activities of the transmission portion of the industry-wide Power Delivery Reliability Initiative, which is developing new tools and methods for assessing and improving grid reliability.

2001-03-26T23:59:59.000Z

34

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

E-Print Network (OSTI)

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 spacecraft component reliability analysis and full-scale testing of SNPS is impractical. Therefore, a properly-designed reliability analysis, systematically applied, may provide an effective means for making judgments about the relative reliability of competing SNPSS. This work examines the applicability of probabilistic risk assessment (PRA) techniques for estimating SNPS reliability from design studies. The nuclear electric power industry has used PRA techniques to accurately analyze the reliability of complex systems. However, these PRA techniques for nuclear power plants require modifications for SNPS reliability assessment. This study validates these modified PRA techniques by examining the reliability of the SP-I 00 and the Small Ex-core Heat Pipe Thermionic Reactor (SEHPTR). The present analysis focuses on the SNPS failure to produce nominal electrical power. Typical events threatening the reliability of the SNPS will consist of hardware failures, external events, and command errors or software deficiencies. This work involves the following systematic steps for each SNPS: e System familiarization ³Performance of a "failure modes and effects analysis" to deten-nine how the failures of components might cause a system failure ³Construction of system and component fault trees ³Reliability data estimation³Fault tree quantification (using CAFTA'O and UNCERT'O) 'Me reliability data estimation relies on occurrence probabilities for each component failure mode. Various methods for estimating failure rates from existing reliability databases or from engineering approximations were investigated. This work employs the Monte Carlo sampling technique to associate numerical uncertainty levels with the quantitative reliability estimates produced for each SNPS. The quantitative results estimate the reliability of the systems studied as 0.9494 for the SP-100 and 0.9453 for the SEHPTR. The associated error factor is approximately 2.0, corresponding to the system modeling and reliability data uncertainties. Importance measures and sensitivity analyses indicate that the fuel damage, sensor, electrical component, mechanical component, drive, and power conditioning, control, and distribution subsystem failures can be critical to the system's reliability.

Gutner, Sophie Isabelle

1996-01-01T23:59:59.000Z

35

Assessment of EPRI Fuel Reliability Guidelines for New Nuclear Plant Designs  

Science Conference Proceedings (OSTI)

As the nuclear power industry pursues the licensing, construction and operation of new advanced LWR designs to meet growing electrical demand, a high level of fuel reliability will be a key factor in the ultimate acceptance and sustainability of these new plants. The new reactor designs under consideration by the industry will utilize fuel assembly/rod designs and operating conditions that are similar to the current fleet. This report assesses the applicability of the EPRI Fuel Reliability Program (FRP) ...

2009-12-09T23:59:59.000Z

36

A FRAMEWORK FOR ASSESSING THE RELIABILITY OF WIND ENERGY CONVERSION SYSTEMS  

E-Print Network (OSTI)

During the last decade, wind power generation has seen rapid development. According to the U.S. Department of Energy, achieving 20 % wind power penetration in the U.S. by 2030 will require: (i) enhancement of the transmission infrastructure, (ii) improvement of reliability and operability of wind systems and (iii) increased U.S. manufacturing capacity of wind generation equipment. This research will concentrate on improvement of reliability and operability of wind energy conversion systems (WECSs). The increased penetration of wind energy into the grid imposes new operating conditions on power systems. This change requires development of an adequate reliability framework. This thesis proposes a framework for assessing WECS reliability in the face of external disturbances, e.g., grid faults and internal component faults. The framework is illustrated using a detailed model of type C WECS- doubly fed induction generator with corresponding deterministic and random variables in a simplified grid model. Fault parameters and performance requirements essential to

Sebastian S?awomir Smater

2009-01-01T23:59:59.000Z

37

Assessing the Reliability and Economics of Wide-Scale Grid-Connected  

NLE Websites -- All DOE Office Websites (Extended Search)

Assessing the Reliability and Economics of Wide-Scale Grid-Connected Assessing the Reliability and Economics of Wide-Scale Grid-Connected Distributed Energy Generation with Application to Electric Power Systems Under Stress Speaker(s): Hisham Zerriffi Date: November 13, 2003 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Kristina LaCommare Electric power systems can be disrupted due to a variety of stress circumstances. These can range from constraints on the physical infrastructure as a result of under-capacity problems to deliberate attacks in times of conflict. Stress conditions can manifest themselves in a variety of ways and determining both the nature of the stress and the best mathematical representation of that stress in the model is complicated. This talk details a quantitative comparison of the reliability of an

38

Can biomass time series be reliably assessed from CPUE time series data Francis Lalo1  

E-Print Network (OSTI)

1 Can biomass time series be reliably assessed from CPUE time series data only? Francis Laloë1 to abundance. This means (i) that catchability is constant and (ii) that all the biomass is catchable. If so, relative variations in CPUE indicate the same relative variations in biomass. Myers and Worm consider

Hawai'i at Manoa, University of

39

Consumer Device Communications Stability Assessment: Communications Reliability Evaluation for End Devices  

Science Conference Proceedings (OSTI)

This project examined issues related to establishing and maintaining reliable long-term communication with end-use devices for load management purposes. The impetus for this project was a broad set of challenges encountered by utilities conducting pilots and projects based on potential new communication technologies and architectures. The challenges were not limited to a specific protocol or media but appeared in a variety of scenarios, particularly those involving home area networks or LANs that ...

2013-12-19T23:59:59.000Z

40

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

E-Print Network (OSTI)

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 capability. The Corporate Motor Technology Team (CMTT) conceived and led a program to optimize the cost effectiveness and reliability of new motors and developed criteria to determine whether to repair or replace motors that fail. The higher energy efficiency of the electric motors offered by vendors today plays a crucial role in these decisions. The company's current motor specification, procurement, maintenance, repair and replacement practices are vastly improved and consistent across the corporation. The 1995 savings attributed to the higher energy efficiency of over 2000 motors installed the prior year amount to $570,000 and will continue to accrue year after year. So will the savings stemming from lower maintenance cost and reduced downtime.

Whelan, C. D.

1997-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Comparison of Qualitative (AP-913) and Quantitative (Generation Risk Assessment) Equipment Reliability Assessment Techniques  

Science Conference Proceedings (OSTI)

In the analysis of the impact of plant structures, systems and components (SSCs) on nuclear safety and plant generation, both qualitative and quantitative techniques have been employed to classify the functional importance of SSCs and to support prioritization in business decision-making. With respect to the potential impact of SSCs on plant generation, this classification has typically been accomplished via qualitative techniques that support equipment reliability programs and the implementation of INPO...

2006-12-18T23:59:59.000Z

42

Lifetime reliability assessment with aging information from low-level sensors  

Science Conference Proceedings (OSTI)

Aggressive technology scaling has led Integrated Circuits (ICs) suffer from ever-increasing wearout effects. As a consequence, Dynamic Reliability Management (DRM) becomes an essential approach to assure IC's lifetime reliability. Accurate and efficient ... Keywords: dynamic reliability management, nbti, reliability

Yao Wang; Sorin D. Cotofana; Liang Fang

2013-05-01T23:59:59.000Z

43

Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR). Version 3.5, Quick Reference Guide  

Science Conference Proceedings (OSTI)

This Reference Guide contains instructions on how to install and use Version 3.5 of the NRC-sponsored Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR). The NUCLARR data management system is contained in compressed files on the floppy diskettes that accompany this Reference Guide. NUCLARR is comprised of hardware component failure data (HCFD) and human error probability (HEP) data, both of which are available via a user-friendly, menu driven retrieval system. The data may be saved to a file in a format compatible with IRRAS 3.0 and commercially available statistical packages, or used to formulate log-plots and reports of data retrieval and aggregation findings.

Gilbert, B.G.; Richards, R.E.; Reece, W.J.; Gertman, D.I.

1992-10-01T23:59:59.000Z

44

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

E-Print Network (OSTI)

control because the industry assumed that power system operationsPower system operations planners conduct extensive studies to assess whether primary frequency controlcontrol is a fundamental requirement for reliable operation of any power system.

Eto, Joseph H.

2011-01-01T23:59:59.000Z

45

A Markov Model for Assessing the Reliability of a Digital Feedwater Control System  

SciTech Connect

A Markov approach has been selected to represent and quantify the reliability model of a digital feedwater control system (DFWCS). The system state, i.e., whether a system fails or not, is determined by the status of the components that can be characterized by component failure modes. Starting from the system state that has no component failure, possible transitions out of it are all failure modes of all components in the system. Each additional component failure mode will formulate a different system state that may or may not be a system failure state. The Markov transition diagram is developed by strictly following the sequences of component failures (i.e., failure sequences) because the different orders of the same set of failures may affect the system in completely different ways. The formulation and quantification of the Markov model, together with the proposed FMEA (Failure Modes and Effects Analysis) approach, and the development of the supporting automated FMEA tool are considered the three major elements of a generic conceptual framework under which the reliability of digital systems can be assessed.

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

2009-02-11T23:59:59.000Z

46

Probabilistic Assessment of Long-Term Vault Durability in ...  

Probabilistic Forecast (GoldSim software) Short-term effect Long-term rate Failure time Results Vault thickness Sulfate attack depth Hypothetical ...

47

A limited assessment of the ASEP human reliability analysis procedure using simulator examination results  

Science Conference Proceedings (OSTI)

This report presents a limited assessment of the conservatism of the Accident Sequence Evaluation Program (ASEP) human reliability analysis (HRA) procedure described in NUREG/CR-4772. In particular, the, ASEP post-accident, post-diagnosis, nominal HRA procedure is assessed within the context of an individual`s performance of critical tasks on the simulator portion of requalification examinations administered to nuclear power plant operators. An assessment of the degree to which operator perforn:Lance during simulator examinations is an accurate reflection of operator performance during actual accident conditions was outside the scope of work for this project; therefore, no direct inference can be made from this report about such performance. The data for this study are derived from simulator examination reports from the NRC requalification examination cycle. A total of 4071 critical tasks were identified, of which 45 had been failed. The ASEP procedure was used to estimate human error probability (HEP) values for critical tasks, and the HEP results were compared with the failure rates observed in the examinations. The ASEP procedure was applied by PNL operator license examiners who supplemented the limited information in the examination reports with expert judgment based upon their extensive simulator examination experience. ASEP analyses were performed for a sample of 162 critical tasks selected randomly from the 4071, and the results were used to characterize the entire population. ASEP analyses were also performed for all of the 45 failed critical tasks. Two tests were performed to assess the bias of the ASEP HEPs compared with the data from the requalification examinations. The first compared the average of the ASEP HEP values with the fraction of the population actually failed and it found a statistically significant factor of two bias on the average.

Gore, B.R.; Dukelow, J.S. Jr.; Mitts, T.M.; Nicholson, W.L. [Pacific Northwest Lab., Richland, WA (United States)

1995-10-01T23:59:59.000Z

48

8.4.7. References For Chapter 8: Assessing Product Reliability  

Science Conference Proceedings (OSTI)

... Nelson, W. (1982), Applied Life Data Analysis, John Wiley ... Equipment Reliability, Availability and Maintainability (RAM), Semiconductor Equipment ...

2013-10-30T23:59:59.000Z

49

Using Rubrics to Assess Information Literacy: An Examination of Methodology and Interrater Reliability  

E-Print Network (OSTI)

Reliability Megan Oakleaf 326 Hinds Hall, Syracuse, NY 13244. E-mail: moakleaf@syr.edu Academic librarians rubrics have not taken a rigorous approach to methodology and interrater reliability. This article seeks,and analyzing the inter- rater reliability of information literacy rubrics in the hands of university librarians

Oakleaf, Megan

50

Long-Term Operations Program: Assessment of Research and Development Supporting Aging Management Programs for Long-Term Operation  

Science Conference Proceedings (OSTI)

Presently, U.S. nuclear utilities and the Nuclear Regulatory Commission (NRC) are discussing a second round of plant license renewals, termed subsequent license renewal (SLR). For the U.S. plants this could mean extending a plant’s operating license from 60 years to 80. To achieve safe and reliable operation for such an extended period will require a comprehensive technical understanding of aging degradation effects on nuclear plant systems, structures, and components (SSCs). EPRI ...

2013-08-29T23:59:59.000Z

51

An overview of the evolution of human reliability analysis in the context of probabilistic risk assessment.  

SciTech Connect

Since the Reactor Safety Study in the early 1970's, human reliability analysis (HRA) has been evolving towards a better ability to account for the factors and conditions that can lead humans to take unsafe actions and thereby provide better estimates of the likelihood of human error for probabilistic risk assessments (PRAs). The purpose of this paper is to provide an overview of recent reviews of operational events and advances in the behavioral sciences that have impacted the evolution of HRA methods and contributed to improvements. The paper discusses the importance of human errors in complex human-technical systems, examines why humans contribute to accidents and unsafe conditions, and discusses how lessons learned over the years have changed the perspective and approach for modeling human behavior in PRAs of complicated domains such as nuclear power plants. It is argued that it has become increasingly more important to understand and model the more cognitive aspects of human performance and to address the broader range of factors that have been shown to influence human performance in complex domains. The paper concludes by addressing the current ability of HRA to adequately predict human failure events and their likelihood.

Bley, Dennis C. (Buttonwood Consulting Inc., Oakton, VA); Lois, Erasmia (U.S. Nuclear Regulatory Commission, Washington, DC); Kolaczkowski, Alan M. (Science Applications International Corporation, Eugene, OR); Forester, John Alan; Wreathall, John (John Wreathall and Co., Dublin, OH); Cooper, Susan E. (U.S. Nuclear Regulatory Commission, Washington, DC)

2009-01-01T23:59:59.000Z

52

Table of Contents Page 1 NERC 2007 Long-Term Reliability Assessment  

E-Print Network (OSTI)

are Pressurized Heavy Water Reactors (PHWR) otherwise known as CANDU2 , a similar Russian design called Reaktor reactors are commonly called CANDU reactors. #12;28 A BWR is a simpler design than a PWR, but it exposes, Japan, Sweden 94 86.4 enriched UO2 water water Pressurised Heavy Water Reactor 'CANDU' (PHWR) Canada 43

53

North American Electric Reliability Corporation (NERC): Reliability  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Corporation (NERC): Reliability Corporation (NERC): Reliability Considerations from the Integration of Smart Grid North American Electric Reliability Corporation (NERC): Reliability Considerations from the Integration of Smart Grid North American Electric Reliability Corporation (NERC): Reliability Considerations from the Integration of Smart Grid. NERC develops and enforces Reliability Standards; assesses adequacy annually via a ten-year forcast and winter and summer forecasts; monitors the bulk power systems; and educates, trains, and certifies industry personnel. North American Electric Reliability Corporation (NERC): Reliability Considerations from the Integration of Smart Grid More Documents & Publications Re: DOE Request for Information - Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities to

54

Assessing the Reliability and Quality of Online Uterine Fibroid Embolization Resources  

Science Conference Proceedings (OSTI)

This study was designed to examine the best internet resources about uterine fibroid embolization (UFE) pertinent to medical trainees, radiologists, gynecologists, family physicians, and patients. The terms 'uterine fibroid embolization,' 'uterine fibroid embolization,' and 'uterine artery embolization' were entered into Google, Yahoo, and Bing search engines; the top 20 hits were assessed. The hits were categorized as organizational or nonorganizational. Additionally, 23 radiological and obstetrical organizations were assessed. The DISCERN instrument and Journal of the American Medical Association (JAMA) benchmarks (authorship, attribution, currency, disclosure) were used to assess the information critically. The scope, strength, weaknesses, and unique features were highlighted for the top five organizational and nonorganizational websites. A total of 203 websites were reviewed; 23 were removed in accordance with the exclusion criteria and 146 were duplicate websites, for a total of 34 unique sites. It was found that 35 % (12/34 websites) were organizational (family medicine, radiology, obstetrics/gynecology) and 65 % (22/34 websites) were nonorganizational (teaching or patient resources). The overall mean DISCERN score was 49.6 (10.7). Two-tailed, unpaired t test demonstrated no statistically significant difference between organizational and nonorganizational websites (p = 0.101). JAMA benchmarks revealed 44 % (15/34 websites) with authorship, 71 % (24/34 websites) with attribution, 68 % (23/34 websites) with disclosure, and 47 % (16/34 websites) with currency. The overall quality of websites for UFE is moderate, with important but not serious shortcomings. The best websites provided relevant information about the procedure, benefits/risks, and were interactive. DISCERN scores were compromised by sites failing to provide resources for shared decision-making, additional support, and discussing consequence of no treatment. JAMA benchmarks revealed lack of authorship and currency.

Kaicker, Jatin; Wu Ke; Athreya, Sriharsha, E-mail: sathreya@stjoes.ca [Michael G. Degroote School of Medicine, Department of Medical Imaging (Canada)] [Michael G. Degroote School of Medicine, Department of Medical Imaging (Canada)

2013-04-15T23:59:59.000Z

55

Fuel Reliability Program: Global Nuclear Fuel Priority 1 Fuel Inspections Results Assessment Report  

Science Conference Proceedings (OSTI)

In an effort to meet the recommendations of the Electric Power Research Institute (EPRI) report 1015032, Fuel Reliability Guidelines: Fuel Surveillance and Inspection, Global Nuclear Fuel (GNF) worked with the Fuel Reliability Program (FRP) and utilities to assign an inspection prioritization ranking to the GNF-fueled U.S. BWR fleet and conducted and completed a series of fuel inspections from 2007 to 2009 at the highest priority plants. Summary presentations of the inspection results were presented at E...

2011-05-12T23:59:59.000Z

56

Corrosion of Spent Nuclear Fuel: The Long-Term Assessment  

Science Conference Proceedings (OSTI)

Spent nuclear fuel, essentially U{sub 2}, accounts for over 95% of the total radioactivity of all of the radioactive wastes in the United States that require disposal, disposition or remediation. The UO{sub 2} in SNF is not stable under oxiding conditions and may also be altered under reducing conditions. The alteration of SNF results in the formation of new uranium phases that can cause the release or retardation of actinide and fission product radionuclides. Over the long term, and depending on the extent to which the secondary uranium phases incorporate fission products and actinides, these alteration phases become the near-field source term.

Rodney C. Ewing

2004-10-07T23:59:59.000Z

57

Integration of the reliability of passive system in probabilistic safety assessment  

SciTech Connect

Probability Safety Assessment (PSA) of nuclear power plants has demonstrated its efficiency in decision-making process. But the treatment in PSA of safety passive systems, specially those implementing moving working fluid, is a difficult task because in addition to the mechanical failures of components, the failure of the physical process (e.g. natural circulation) has to be considered. The difficulty in the evaluation of the failure risk of the physical phenomenon lies in the great number of parameters that must be taken into account, in their associated uncertainties and in the limitations of physical modelling. We can note that in the existing PSA of future reactors equipped with passive systems, this risk of the physical process failure due to the uncertainties, is not at all taken into account. In this paper, we present a methodology to evaluate this risk of failure and to include it in a PSA. This evaluation is obtained by uncertainty analyses on thermalhydraulic calculations. As an example, a simplified PSA was carried out on a fictive reactor with two types of safety passive systems both in the primary circuit: Residual Passive heat Removal system (RP2) and a safety injection system consisting in accumulators and discharge lines equipped with check valves. An accidental scenario has been analysed, starting with loss of electrical supply when the reactor is at full power. The failure analyses performed on this reactor have allowed the characterisation of the technical failures (on RP2 valves, tubes in RP2 exchanger and safety injection check valves) and the ranges of variation of uncertain parameters which influence the physical process. The resulting accidental scenario is presented in the form of a simplified event tree. The majority of the sequences of this event tree have been analysed by deterministic evaluations with envelope values of the uncertain parameters. For some sequences where the definition of envelope cases was impossible, basic events corresponding to the failure of the physical process have been added and uncertainty analyses have been performed to evaluate the corresponding probability of failure. For this purpose the thermal-hydraulic CATHARE code has been coupled to a Monte-Carlo simulation modulus. The failure probabilities obtained by these reliability analyses have been integrated in the corresponding sequences. This methodology allows the probabilistic evaluation of the influence of the passive system on an accidental scenario and could be used to test the interest to replace an active system by a passive system on specific situations. (authors)

Marques, M. [Commissariat a l'Energie Atomique (CEA), Building 212, Centre de Cadarache, 13108 Saint-Paul-Les-Durance Cedex (France); Pignatel, J.F.; Saignes, P.; Devictor, N.; La Lumia, V.; Mercier, S

2004-07-01T23:59:59.000Z

58

Augmented cognition and cognitive state assessment technology: near-term, mid-term, and long-term research objectives  

Science Conference Proceedings (OSTI)

The 1st Augmented Cognition International (ACI) conference was held in July 2005 in conjunction with the HCI International conference in Las Vegas, Nevada. A full day working group session was held during this inaugural ACI conference to facilitate the ... Keywords: augmented cognition, cognitive state assessment, design, human factors, neuroergonomics, neurophysiological, neurotechnologies, sensors

Leah M. Reeves; Dylan D. Schmorrow; Kay M. Stanney

2007-07-01T23:59:59.000Z

59

TERMS OF REFERENCE REGIONAL ANALYST, Election Assessment Mission (EAM)  

E-Print Network (OSTI)

The ODIHR is the leading agency in Europe in the field of election observation. It coordinates and organizes the deployment of several observation missions with thousands of observers every year to assess the compliance of elections in OSCE participating States in line with OSCE commitments, other international standards for democratic elections and national legislation. Its unique methodology provides an in-depth insight into all elements of an electoral process, and permits to make concrete recommendations to further improve electoral processes. Objective Under the direction of the Head of the ODIHR Election Assessment Mission (EAM), the Regional Analyst is responsible for observing all aspects of the election cycle, and gaining an in-depth understanding of the overall pre-election administrative procedures and campaign environment in the area of deployment. The Regional Analyst should pay particular attention to the following aspects of the election cycle: • voter identification and registration;

unknown authors

2010-01-01T23:59:59.000Z

60

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

SciTech Connect

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.

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

2010-12-20T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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61

Trade-offs in size, quantity and reliability of generalized nuclear power plants: a preliminary assessment  

SciTech Connect

An approximate method is used to estimate the effects of system reliability on optimal nuclear plant size, taking into account also scale factors and manufacturing learning curve slopes. The method is used to estimate the additional effective capability gained by adding units of different sizes to an existing electrical system. The number of additional units proves to be sensitive to forced outrage rate, estimated here from trends in US light-water reactors from 1971 to 1980. The relative cost of added units ranging in size from 200 to 800 MW is determined as a function of the parameters: scale factor and learning curve slope. The results generally corrobate the trends found in an earlier study in which the effect of reliability on required installed capacity was not explicitly considered. Optimal plant size decreases with weaker scale effects and stronger learning curve effects. Reliability considerations further reduce the optimal plant size, but the relative reduction is apparently not as great with steeper learning curves. This is a plausible finding inasmuch as the reduction in numbers of additional units due to reliability considerations will affect cost most where the learning curve is steepest. 9 refs., 4 figs., 3 tabs.

Hill, D.

1985-04-01T23:59:59.000Z

62

APPENDIX. TERMS OF REFERENCE Terms of Reference for the 41st Northeast Stock Assessment Workshop  

E-Print Network (OSTI)

projection) using the same configurations as those used in the 2004 SAW Southern Demersal Working Group (WG) assessment update. 2. Estimate biological reference points derived by yield and SSB per recruit analysis and by stock-recruitment modeling, following the procedures adopted by the 2002 Working Group on Re-Evaluation of Biological Reference Points for New England Groundfish. 3. Consider the recommendations of the MAFMC Science and Statistical Committee (SSC) 2001 peer review of the summer flounder Overfishing Definition in developing the analyses described in TOR 2. The major recommendations were to explore other proxies (besides Fmax) to FMSY, to continue stock-recruitment model development as additional stock-recruit estimates become available, and to monitor and utilize new data on the population dynamics of summer flounder (e.g., age, growth, and maturity) as they become available. 4. Review, evaluate and report on the status of the SARC/Working Group research recommendations offered in previous SARC and WG reviewed assessments. B. Bluefish- ASMFC Technical Committee/Assessment Subcommittee 1. Evaluate adequacy, appropriateness and uncertainty of fishery-dependent and fisheryindependent

Woods Hole; A. Summer; Flounder Saw; Southern Demersal

2005-01-01T23:59:59.000Z

63

Assessing Reliability in Transportation Energy Supply Pathways: A Hydrogen Case Study  

E-Print Network (OSTI)

term prospects for natural gas supply. Washington DC: SR/worldwide, subjecting natural gas supply to many of the samenatural gas and petroleum infrastructure: (1) primary energy supply, (

McCarthy, Ryan; Ogden, Joan M

2005-01-01T23:59:59.000Z

64

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

E-Print Network (OSTI)

Mid-Term Prospects for Natural Gas Supply. U.S. DOE, SR/OF TABLES Table 1. Natural gas supply projections throughNatural Gas Supply.

McCarthy, Ryan

2004-01-01T23:59:59.000Z

65

An experimental study of assessment of weld quality on fatigue reliability analysis of a nuclear pressure vessel  

SciTech Connect

The steam generator in a PWR primary coolant system is one of the pieces of equipment made in China for the Qinshan nuclear power plant, Zhejiang. It is a crucial unit belonging to the category of nuclear pressure vessel. The purpose of this research work is to carry out an examination of the weld quality of the steam generator under fatigue loading and to assess its reliability by using experimental results of a fatigue test of the nuclear pressure vessel steel S-271 (Chinese Standard) and of qualified tests of welded seams of a simulated prototype of the bottom closure head of the steam generator. A guarantee of weld quality is proposed as the quality assurance of safety for the China National Nuclear Safety Supervision Bureau. The results of the reliability analysis reported in this work can be taken as supplementary material for a Probabilistic Risk Assessment (PRA) of the Qinshan nuclear power plant. According to the requirement of Provision 2-1500 CYCLIC TESTING, ASME Boiler and Pressure Vessel Code, Section 3, Rules for Construction of Nuclear Power Plant Components, a simulated prototype of the bottom closure head of the steam generator was made in this work for the qualified tests. Qualified tests with small sample size present a problem which is difficult to solve in reliability analysis, and are therefore of interest. Here, the authors offer proposals attempting to solve this problem.

Dai, Shuho (Nanjing Inst. of Chemical Technology, Jiangsu (China). Dept. of Mechanical Engineering)

1993-11-01T23:59:59.000Z

66

Restoring Faith in the bulk-power system: an early assessment of mandatory reliability standards  

SciTech Connect

The driving force underlying creation of mandatory reliability standards was the prevention of widespread outages, such as those that occurred in 1965, 1977 and 2003. So far, no similar outage has occurred when an entity is in full compliance with the standards, and NERC and FERC have demonstrated that they will actively enforce compliance while aggressively pursuing entities alleged to be non-compliant. (author)

McAllister, Levi; Dawson, Kelly L.

2010-03-15T23:59:59.000Z

67

Case Study on Assessment of Achieving Increased Reliability with Distributed Energy Resources: Consolidated Edison  

Science Conference Proceedings (OSTI)

Consolidated Edison (Con Edison) and the Electric Power Research Institute (EPRI) undertook an investigation of whether distributed energy resources, including distributed generation, storage and demand response load reductions, could help achieve greater reliability for a network served by a specific substation in New York City. The project was a first-level screening to determine the feasibility, costs, and benefits of using distributed energy resources as an alternative to conventional ...

2012-10-31T23:59:59.000Z

68

Assessing urban and rural neighborhood characteristics using audit and GIS data: derivation and reliability of constructs  

E-Print Network (OSTI)

Bureau: Census 2000 urban and rural classifications. 2009 [Assessing urban and rural neighborhood characteristics usingreliability in both urban and rural segments (r = 0.96).

Evenson, Kelly R; Sotres-Alvarez, Daniela; Herring, Amy H; Messer, Lynne; Laraia, Barbara A; Rodríguez, Daniel A

2009-01-01T23:59:59.000Z

69

Tracking the Reliability of the U.S. Electric Power System: An Assessment of Publicly Available Information Reported to State Public Utility Commissions  

SciTech Connect

Large blackouts, such as the August 14-15, 2003 blackout in the northeasternUnited States and Canada, focus attention on the importance of reliable electric service. As public and private efforts are undertaken to improve reliability and prevent power interruptions, it is appropriate to assess their effectiveness. Measures of reliability, such as the frequency and duration of power interruptions, have been reported by electric utilities to state public utility commissions for many years. This study examines current state and utility practices for collecting and reporting electricity reliability information and discusses challenges that arise in assessing reliability because of differences among these practices. The study is based primarily on reliability information for 2006 reported by 123 utilities to 37 state public utility commissions.

LaCommare, Kristina H.; Eto, Joseph H.

2008-10-10T23:59:59.000Z

70

Assessing the 21st century shift in ENSO variability in terms of the Bjerknes stability index  

Science Conference Proceedings (OSTI)

A decadal change in the character of ENSO was observed around year 2000 towards weaker amplitude, higher frequency events with an increased occurrence of central Pacific El Niños. Here these changes are assessed in terms of the Bjerknes stability ...

Joke F. Lübbecke; Michael J. McPhaden

71

Natural Circulation in Water Cooled Nuclear Power Plants Phenomena, models, and methodology for system reliability assessments  

Science Conference Proceedings (OSTI)

In recent years it has been recognized that the application of passive safety systems (i.e., those whose operation takes advantage of natural forces such as convection and gravity), can contribute to simplification and potentially to improved economics of new nuclear power plant designs. In 1991 the IAEA Conference on ''The Safety of Nuclear Power: Strategy for the Future'' noted that for new plants the use of passive safety features is a desirable method of achieving simplification and increasing the reliability of the performance of essential safety functions, and should be used wherever appropriate''.

Jose Reyes

2005-02-14T23:59:59.000Z

72

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

E-Print Network (OSTI)

24 Table 3. Top five petroleum supplying nations into U.S.23 Figure 3. The National Petroleum Council’s assessment of28 Figure 5. U.S. net petroleum imports since

McCarthy, Ryan

2004-01-01T23:59:59.000Z

73

How reliable are Finite-Size Lyapunov Exponents for the assessment of ocean dynamics?  

E-Print Network (OSTI)

Much of atmospheric and oceanic transport is associated with coherent structures. Lagrangian methods are emerging as optimal tools for their identification and analysis. An important Lagrangian technique which is starting to be widely used in oceanography is that of Finite-Size Lyapunov Exponents (FSLEs). Despite this growing relevance there are still many open questions concerning the reliability of the FSLEs in order to analyse the ocean dynamics. In particular, it is still unclear how robust they are when confronted with real data. In this paper we analyze the effect on this Lagrangian technique of the two most important effects when facing real data, namely noise and dynamics of unsolved scales. Our results, using as a benchmarch data from a primitive numerical model of the Mediterranean Sea, show that even when some dynamics is missed the FSLEs results still give an accurate picture of the oceanic transport properties.

Ismael Hernández-Carrasco; Emilio Hernández-García; Cristóbal López; Antonio Turiel

2010-09-13T23:59:59.000Z

74

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

E-Print Network (OSTI)

on the Interstate Natural Gas Pipeline System. U.S. DOE,May. EIA (2001a) U.S. Natural Gas Markets: Recent Trends andD.C. , May. EIA (2001b) U.S. Natural Gas Markets: Mid-Term

McCarthy, Ryan

2004-01-01T23:59:59.000Z

75

USING EXPERT MODELS IN HUMAN RELIABILITY ANALYSIS A DEPENDENCE ASSESSMENT METHOD BASED  

E-Print Network (OSTI)

of an Anticipated Transient Without Scram (ATWS) scenario in a nuclear Boiling Water Reactor (BWR the computerized diagnostic aids used in nuclear p ower plants, e.g. Chang et al. (1995), and clinical decision for nuclear power plants applications, human failure dependence assessment is an important part of the HRA

76

Chronological Reliability Model Incorporating Wind Forecasts to Assess Wind Plant Reserve Allocation: Preprint  

DOE Green Energy (OSTI)

Over the past several years, there has been considerable development and application of wind forecasting models. The main purpose of these models is to provide grid operators with the best information available so that conventional power generators can be scheduled as efficiently and as cost-effectively as possible. One of the important ancillary services is reserves, which involves scheduling additional capacity to guard against shortfalls. In a recent paper, Strbac and Kirschen[1] proposed a method to allocate the reserve burden to generators. Although Milligan adapted this technique to wind plants[2], neither of these papers accounts for the wind forecast in the reliability calculation. That omission is rectified here. For the system studied in this paper, we found that a reserve allocation scheme using 1-hour forecasts results in a small allocation of system reserve relative to the rated capacity of the wind power plant. This reserve allocation is even smaller when geographically dispersed wind sites are used instead of a large single site.

Milligan, M. R.

2002-05-01T23:59:59.000Z

77

Economic and Nonproliferation Analysis Framework for Assessing Reliable Nuclear Fuel Service Arrangements  

Science Conference Proceedings (OSTI)

Nuclear power is now broadly recognized as an essential technology in national strategies to provide energy security while meeting carbon management goals. Yet a long standing conundrum remains: how to enable rapid growth in the global nuclear power infrastructure while controlling the spread of sensitive enrichment and reprocessing technologies that lie at the heart of nuclear fuel supply and nuclear weapons programs. Reducing the latent proliferation risk posed by a broader horizontal spread of enrichment and reprocessing technology has been a primary goal of national nuclear supplier policies since the beginning of the nuclear power age. Attempts to control the spread of sensitive nuclear technology have been the subject of numerous initiatives in the intervening decades sometimes taking the form of calls to develop fuel supply and service assurances to reduce market pull to increase the number of states with fuel cycle capabilities. A clear understanding of what characteristics of specific reliable nuclear fuel service (RNFS) and supply arrangements qualify them as 'attractive offers' is critical to the success of current and future efforts. At a minimum, RNFS arrangements should provide economic value to all participants and help reduce latent proliferation risks posed by the global expansion of nuclear power. In order to inform the technical debate and the development of policy, Pacific Northwest National Laboratory has been developing an analytical framework to evaluate the economics and nonproliferation merits of alternative approaches to RNFS arrangements. This paper provides a brief overview of the economic analysis framework developed and applied to a model problem of current interest: full-service nuclear fuel leasing arrangements. Furthermore, this paper presents an extended outline of a proposed analysis approach to evaluate the non-proliferation merits of various RNFS alternatives.

Phillips, Jon R.; Kreyling, Sean J.; Short, Steven M.; Weimar, Mark R.

2010-04-14T23:59:59.000Z

78

Process and reliability assessment of plasma-based copper etch process  

E-Print Network (OSTI)

The plasma-based etching processes of copper (Cu) and titanium tungsten (TiW) thin films, and the electromigration of the copper lines patterned by above etching processes were studied. Instead of vaporizing the plasma/copper reaction product, a dilute hydrogen chloride solution was used to dissolve the nonvolatile reaction product. The plasma/copper reaction process was affected by many factors including the microstructure of the copper film and the plasma conditions. Under the same chlorine plasma exposure condition, the copper conversation rate and the copper chloride (CuClx) formation rate increased monotonically with the Cu grain size. The characteristics of the Cu etching process were explained by diffusion mechanisms of Cl and Cu in the plasmacopper reaction process as well as microstructures of Cu and CuClx. The Cu chlorination process was also affected by the additive gas in the Cl2 plasma. The additive gas, such as Ar, N2, and CF4, dramatically changed the plasma phase chemistry, i.e., the Cl concentration, and the ion bombardment energy, which resulted in changes of the Cu chlorination rate and the sidewall roughness. TiW thin films, used as the diffusion barrier layer for the Cu film, were reactive ion etched with CF4/O2, CF4/Cl2, and CF4/HCl plasma. Process parameter such as feed gas composition, RF power, and plasma pressure showed tremendous effects on the etch rate and the etch selectivity. The TiW etch rate was a function of the sum of Cl and F concentrations and the ion bombardment energy. Cu/diffusion barrier metal stack was successfully patterned by above plasma etch processes. The electromigration (EM) performance of the Cu lines was evaluated by the accelerated isothermal test. The activation energy of 0.5~0.6 eV and the current density exponent of 2.7 were obtained. Failure analysis showed that both copper-silicon nitride cap layer interface and the copper grain boundary were active diffusion paths. The EM induced stress caused the cap layer crack and affected the reliability of Cu lines. The processes studied in this dissertation can be applied in advanced microelectronic fabrication including large area flexible microelectronics.

Liu, Guojun

2008-08-01T23:59:59.000Z

79

Assessing climate change impacts on the near-term stability of the wind energy  

E-Print Network (OSTI)

Assessing climate change impacts on the near-term stability of the wind energy resource over- ble emissions of carbon dioxide. The wind energy resource is natu- rally a function of the climate, leading some to question the continued viability of the wind energy industry. Here we briefly articulate

Pryor, Sara C.

80

AN ANALYTICAL FRAMEWORK FOR ASSESSING RELIABLE NUCLEAR FUEL SERVICE APPROACHES: ECONOMIC AND NON-PROLIFERATION MERITS OF NUCLEAR FUEL LEASING  

Science Conference Proceedings (OSTI)

The goal of international nuclear policy since the dawn of nuclear power has been the peaceful expansion of nuclear energy while controlling the spread of enrichment and reprocessing technology. Numerous initiatives undertaken in the intervening decades to develop international agreements on providing nuclear fuel supply assurances, or reliable nuclear fuel services (RNFS) attempted to control the spread of sensitive nuclear materials and technology. In order to inform the international debate and the development of government policy, PNNL has been developing an analytical framework to holistically evaluate the economics and non-proliferation merits of alternative approaches to managing the nuclear fuel cycle (i.e., cradle-to-grave). This paper provides an overview of the analytical framework and discusses preliminary results of an economic assessment of one RNFS approach: full-service nuclear fuel leasing. The specific focus of this paper is the metrics under development to systematically evaluate the non-proliferation merits of fuel-cycle management alternatives. Also discussed is the utility of an integrated assessment of the economics and non-proliferation merits of nuclear fuel leasing.

Kreyling, Sean J.; Brothers, Alan J.; Short, Steven M.; Phillips, Jon R.; Weimar, Mark R.

2010-08-11T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Framework for Stochastic Reliability of Bulk Power System  

Science Conference Proceedings (OSTI)

Value-based reliability assessment is a useful aid to effective decision making about short- and long-term transmission planning and operation. This report describes efforts to develop additional functionality in EPRI's Transmission Reliability Evaluation for Large Scale Systems (TRELSS) program.

1998-03-26T23:59:59.000Z

82

8. Assessing Product Reliability  

Science Conference Proceedings (OSTI)

... Many statistical methods can be used to fit models ... Most models in actual use do not include any ... when only one stress changes does not depend ...

2013-10-30T23:59:59.000Z

83

Physical Stability of Long-Term Surface Barriers-Assessment of Potentially Disruptive Natural Events  

NLE Websites -- All DOE Office Websites (Extended Search)

] ] a -" m HI BHI-00145 Rev. 00 Physical Stability of Long-Term Surface Barriers - Assessment of Potentially Disruptive Natural Events Authors N. R. Wing IT Hanford, Inc. F. M. Corpuz Bechtel Hanford, Inc. K. L. Petersen Pacific Northwest Laboratoy A. M. Tallman Westinghouse Hanford Company Date Published May 1995 HANFORD Prepared for the U.S. Department of Energy Office of Environmental Restoration and Waste Management Bechtel Hanford, Inc. Flichland, Washington Approved for Public Release . b q q BHI-00145 ma) Ou: NIA TSD: NIA ERA: NIA APPROVAL PAGE Title of Dccumw PHYSICAL STABILITY OF LONG-TERM SURFACE BARRIERS - ASSESSMENT OF POTE.INTI.ALLYDISRUPTIVE NATURAL Author(s): N. R. Wq, lT ~Otd, Inc. K. L. PetmerL hCi.fiC Northwest Labmtory F. M. Corpuz, Bechkl Hanford, Inc. A. M. Tai.lmaq W-owe HEUlfOd Corqnny Approvai: J. G. Zoghbi, Acting Manager, Technology Demonstration

84

Assessment of Long-Term Research Needs for Shale-Oil Recovery (FERWG-III)  

SciTech Connect

The Fossil Energy Research Working Group (FERWG), at the request of E. Frieman (Director, Office of Energy Research) and G. Fumich, Jr. (Assistant Secretary for Fossil Fuels), has reviewed and evaluated the U.S. programs on shale-oil recovery. These studies were performed in order to provide an independent assessment of critical research areas that affect the long-term prospects for shale-oil availability. This report summarizes the findings and research recommendations of FERWG.

Penner, S.S.

1981-03-01T23:59:59.000Z

85

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

E-Print Network (OSTI)

Performance of Wind Power Generation Working Group. ” IEC1971. Control of Generation and Power Flow on Interconnectedvariable renewable generation on power system reliability,

Eto, Joseph H.

2011-01-01T23:59:59.000Z

86

Electricity Reliability  

NLE Websites -- All DOE Office Websites (Extended Search)

lines and bar graph Electricity Reliability The Consortium for Electric Reliability Technology Solutions (CERTS) conducts research, develops, and disseminates new methods, tools,...

87

Two new methods to assess short-term transmission reliability + **Jose R. Arce G *Marija D, Ilid ` Francisco F. Garces  

E-Print Network (OSTI)

wbrni((ed by (he demand in t;lls new method the et?er~ price after the occurrence of conlmgerq by the demand In an explfclt way In IhIScase the enera gmcecalculated beforethe occurrence qf contingency Institute of Technology Cambridge, MA, USA actually represents different problems and interests, ranging

Ilic, Marija D.

88

Independent assessment of MELCOR as a severe accident thermal-hydraulic/source term analysis tool  

SciTech Connect

MELCOR is a fully integrated computer code that models all phases of the progression of severe accidents in light water reactor nuclear power plants, and is being developed for the US Nuclear Regulatory Commission (NRC) by Sandia National Laboratories (SNL). Brookhaven National Laboratory (BNL) has a program with the NRC called ``MELCOR Verification, Benchmarking, and Applications,`` whose aim is to provide independent assessment of MELCOR as a severe accident thermal-hydraulic/source term analysis tool. The scope of this program is to perform quality control verification on all released versions of MELCOR, to benchmark MELCOR against more mechanistic codes and experimental data from severe fuel damage tests, and to evaluate the ability of MELCOR to simulate long-term severe accident transients in commercial LWRs, by applying the code to model both BWRs and PWRs. Under this program, BNL provided input to the NRC-sponsored MELCOR Peer Review, and is currently contributing to the MELCOR Cooperative Assessment Program (MCAP). This paper presents a summary of MELCOR assessment efforts at BNL and their contribution to NRC goals with respect to MELCOR.

Madni, I.K. [Brookhaven National Lab., Upton, NY (United States); Eltawila, F. [Nuclear Regulatory Commission, Washington, DC (United States)

1994-01-01T23:59:59.000Z

89

Long-term allocation of power from the Snettisham Project. Environmental Assessment  

SciTech Connect

The Alaska Power Administration (APA) has prepared an Environmental Assessment (EA) (DOE/EA-0839) evaluating the Final Marketing Plan for the Snettisham Project that establishes long-term allocation and sales of power. The proposed long-term sales contract will replace a 20-year sales agreement that expires at the end of December, 1993. The EA evaluates the proposed alternative and the no action alternative. The proposed alternative replaces the expiring contract with a new 20-year contract with the same terms, conditions and allocation as the previous long-term contract. No other alternatives were developed, as there is only one utility in the Juneau area. The divestiture of this Federal project is expected to be approved by Congress; the present contractor would then assume the ownership and operation of the Snettisham Project. The EA identified no actions associated with the proposal that will cause significant environmental or socioeconomic impacts. The Final Marketing Plan for the Snettisham Project deals with the replacement of an expiring contract. The Final Marketing Plan does not include the addition of any major new resources, service to discrete major new loads, or major changes in operating parameters. No changes in rates are proposed in the Final Marketing Plan.

Not Available

1993-06-23T23:59:59.000Z

90

Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR): Data manual. Part 2: Human error probability (HEP) data; Volume 5, Revision 4  

SciTech Connect

This data manual contains a hard copy of the information in the Nuclear Computerized Library for Assessing Reactor Reliability (NUCLARR) Version 3.5 database, which is sponsored by the US Nuclear Regulatory Commission. NUCLARR was designed as a tool for risk analysis. Many of the nuclear reactors in the US and several outside the US are represented in the NUCLARR database. NUCLARR includes both human error probability estimates for workers at the plants and hardware failure data for nuclear reactor equipment. Aggregations of these data yield valuable reliability estimates for probabilistic risk assessments and human reliability analyses. The data manual is organized to permit manual searches of the information if the computerized version is not available. Originally, the manual was published in three parts. In this revision the introductory material located in the original Part 1 has been incorporated into the text of Parts 2 and 3. The user can now find introductory material either in the original Part 1, or in Parts 2 and 3 as revised. Part 2 contains the human error probability data, and Part 3, the hardware component reliability data.

Reece, W.J.; Gilbert, B.G.; Richards, R.E. [EG and G Idaho, Inc., Idaho Falls, ID (United States)

1994-09-01T23:59:59.000Z

91

LONG-TERM ASSESSMENT OF CRITICAL RADIONUCLIDES AND ASSOCIATED ENVIRONMENTAL MEDIA AT THE SAVANNAH RIVER SITE  

Science Conference Proceedings (OSTI)

During the operational history of the Savannah River Site (SRS), many different radionuclides have been released from site facilities. However, only a relatively small number of the released radionuclides have been significant contributors to doses and risks to the public. At SRS dose and risk assessments indicate tritium oxide in air and surface water, and Cs-137 in fish and deer have been, and continue to be, the critical radionuclides and pathways. In this assessment, indepth statistical analyses of the long-term trends of tritium oxide in atmospheric and surface water releases and Cs-137 concentrations in fish and deer are provided. Correlations also are provided with 1) operational changes and improvements, 2) geopolitical events (Cold War cessation), and 3) recent environmental remediation projects and decommissioning of excess facilities. For example, environmental remediation of the F- and H-Area Seepage Basins and the Solid Waste Disposal Facility have resulted in a measurable impact on the tritium oxide flux to the onsite Fourmile Branch stream. Airborne releases of tritium oxide have been greatly affected by operational improvements and the end of the Cold War in 1991. However, the effects of SRS environmental remediation activities and ongoing tritium operations on tritium concentrations in the environment are measurable and documented in this assessment. Controlled hunts of deer and feral hogs are conducted at SRS for approximately six weeks each year. Before any harvested animal is released to a hunter, SRS personnel perform a field analysis for Cs-137 concentrations to ensure the hunter’s dose does not exceed the SRS administrative game limit of 0.22 millisievert (22 mrem). However, most of the Cs-137 found in SRS onsite deer is not from site operations but is from nuclear weapons testing fallout from the 1950’s and early 1960’s. This legacy source term is trended in the SRS deer, and an assessment of the “effective” half-life of Cs-137 in deer (including the physical decay half-life and the environmental dispersion half-life) is provided. The “creek mouth” fisherman is the next most critical pathway at SRS. On an annual basis, three species of fish (panfish, catfish, and bass) are sampled from the mouths of the five SRS streams. Three composites of up to five fish of each species are analyzed from each sampling location. Long-term trending of the Cs-137 concentrations in fish and the subsequent doses from consumption of SRS fish is provided.

Jannik, T.; Baker, R.; Lee, P.; Eddy, T.; Blount, G.; Whitney, G.

2012-11-06T23:59:59.000Z

92

Long-Term Assessment of Critical Radionuclides and Associated Environmental Media at the Savannah River Site  

SciTech Connect

During the operational history of the Savannah River Site (SRS), many different radionuclides have been released from site facilities. However, only a relatively small number of the released radionuclides have been significant contributors to doses and risks to the public. At SRS dose and risk assessments indicate tritium oxide in air and surface water, and Cs-137 in fish and deer have been, and continue to be, the critical radionuclides and pathways. In this assessment, indepth statistical analyses of the long-term trends of tritium oxide in atmospheric and surface water releases and Cs-137 concentrations in fish and deer are provided. Correlations also are provided with 1) operational changes and improvements, 2) geopolitical events (Cold War cessation), and 3) recent environmental remediation projects and decommissioning of excess facilities. For example, environmental remediation of the F- and H-Area Seepage Basins and the Solid Waste Disposal Facility have resulted in a measurable impact on the tritium oxide flux to the onsite Fourmile Branch stream. Airborne releases of tritium oxide have been greatly affected by operational improvements and the end of the Cold War in 1991. However, the effects of SRS environmental remediation activities and ongoing tritium operations on tritium concentrations in the environment are measurable and documented in this assessment. Controlled hunts of deer and feral hogs are conducted at SRS for approximately six weeks each year. Before any harvested animal is released to a hunter, SRS personnel perform a field analysis for Cs-137 concentrations to ensure the hunter's dose does not exceed the SRS administrative game limit of 0.22 millisievert (22 mrem). However, most of the Cs-137 found in SRS onsite deer is not from site operations but is from nuclear weapons testing fallout from the 1950's and early 1960's. This legacy source term is trended in the SRS deer, and an assessment of the ''effective'' half-life of Cs-137 in deer (including the physical decay half-life and the environmental dispersion half-life) is provided. The ''creek mouth'' fisherman is the next most critical pathway at SRS. On an annual basis, three species of fish (panfish, catfish, and bass) are sampled from the mouths of the five SRS streams. Three composites of up to five fish of each species are analyzed from each sampling location. Long-term trending of the Cs-137 concentrations in fish and the subsequent doses from consumption of SRS fish is provided.

2012-11-06T23:59:59.000Z

93

China's Building Energy Use: A Long-Term Perspective based on a Detailed Assessment  

SciTech Connect

We present here a detailed, service-based model of China's building energy use, nested in the GCAM (Global Change Assessment Model) integrated assessment framework. Using the model, we explore long-term pathways of China's building energy use and identify opportunities of reducing greenhouse gas emissions. The inclusion of a structural model of building energy demands within an integrated assessment framework represents a major methodological advance. It allows for a structural understanding of the drivers of building energy consumption while simultaneously considering the other human and natural system interactions that influence changes in the global energy system and climate. We also explore a range of different scenarios to gain insights into how China's building sector might evolve and what the implications might be for improved building energy technology and carbon policies. The analysis suggests that China's building energy growth will not wane anytime soon, although technology improvement will put downward pressure on this growth. Also, regardless of the scenarios represented, the growth will involve the continued, rapid electrification of the buildings sector throughout the century, and this transition will be accelerated by the implementation of carbon policy.

Eom, Jiyong; Clarke, Leon E.; Kim, Son H.; Kyle, G. Page; Patel, Pralit L.

2012-01-13T23:59:59.000Z

94

China's Building Energy Demand: Long-Term Implications from a Detailed Assessment  

Science Conference Proceedings (OSTI)

We present here a detailed, service-based model of China’s building energy use, nested in the GCAM (Global Change Assessment Model) integrated assessment framework. Using the model, we explore long-term pathways of China’s building energy use and identify opportunities of reducing greenhouse gas emissions. The inclusion of a structural model of building energy demands within an integrated assessment framework represents a major methodological advance. It allows for a structural understanding of the drivers of building energy consumption while simultaneously considering the other human and natural system interactions that influence changes in the global energy system and climate. We also explore a range of different scenarios to gain insights into how China’s building sector might evolve and what the implications might be for improved building energy technology and carbon policies. The analysis suggests that China’s building energy growth will not wane anytime soon, although technology improvement will put downward pressure on this growth. Also, regardless of the scenarios represented, the growth will involve the continued, rapid electrification of the buildings sector throughout the century, and this transition will be accelerated by the implementation of carbon policy.

Eom, Jiyong; Clarke, Leon E.; Kim, Son H.; Kyle, G. Page; Patel, Pralit L.

2012-10-01T23:59:59.000Z

95

DURABILITY, RELIABILITY, AND SERVICE LIFE ...  

Science Conference Proceedings (OSTI)

Kaipeng Liu, Xiaohong Gu. In practical applications of PV solar cells, long-term weathering durability and reliable performance are essential. ...

96

Stress-Rupture, Overstressing and a Proposed New Methodology to Assess the Durability and Reliability of Ceramic Matrix Composites at Elevated Temperatures  

DOE Green Energy (OSTI)

A new testing strategy is proposed to assess the durability and reliability of non- oxide continuous fiber-reinforced ceramic composites for high temperature structural applications. The strategy is based on determining the reliability (probability of failure) of these materials when subjected to random loading schedules consisting of load and temperature spikes that are superimposed on otherwise constant stress and temperature histories. The frequency and magnitude of the load and temperature spikes would be representative of the number and characteristics of the transients that are associated with a particular industrial application and that are expected to occur over the life of the component. The effect of overstressing on the stress- ruptttre behavior of a CG-NicalonTM fiber-reinforced SiC composite was investigated and results arc presented from tests conducted in ambient air at 950"C.

Lara-Curzio, E.

1999-07-05T23:59:59.000Z

97

A technique for early software reliability prediction  

Science Conference Proceedings (OSTI)

In early developmental stages of software, failure data is not available to determine the reliability of software. But developers need reliability prediction for quality assessment and resource planning. We propose a model based on Reliability Block ...

Rakesh Tripathi; Rajib Mall

2005-12-01T23:59:59.000Z

98

Electricity Reliability  

E-Print Network (OSTI)

and reliability of the energy infrastructure, and facilitating recovery from disruptions to energy supply. MajorElectricity Delivery and Energy Reliability High Temperature Superconductivity (HTS) Visualization on the nation's energy delivery system Superconductors are important to meeting the nation's energy needs

99

Assessing the near-term risk of climate uncertainty : interdependencies among the U.S. States.  

SciTech Connect

Policy makers will most likely need to make decisions about climate policy before climate scientists have resolved all relevant uncertainties about the impacts of climate change. This study demonstrates a risk-assessment methodology for evaluating uncertain future climatic conditions. We estimate the impacts from responses to climate change on U.S. state- and national-level economic activity from 2010 to 2050. To understand the implications of uncertainty on risk and to provide a near-term rationale for policy interventions to mitigate the course of climate change, we focus on precipitation, one of the most uncertain aspects of future climate change. We use results of the climate-model ensemble from the Intergovernmental Panel on Climate Change's (IPCC) Fourth Assessment Report (AR4) as a proxy for representing climate uncertainty over the next 40 years, map the simulated weather from the climate models hydrologically to the county level to determine the physical consequences on economic activity at the state level, and perform a detailed 70-industry analysis of economic impacts among the interacting lower-48 states. We determine the industry-level contribution to the gross domestic product and employment impacts at the state level, as well as interstate population migration, effects on personal income, and consequences for the U.S. trade balance. We show that the mean or average risk of damage to the U.S. economy from climate change, at the national level, is on the order of $1 trillion over the next 40 years, with losses in employment equivalent to nearly 7 million full-time jobs.

Reinert, Rhonda K.; Stamber, Kevin Louis; Robinson, David B.; Backus, George A.; Fogelman, William; Cutler, Laura; Boslough, Mark Bruce Elrick; Finely, Ray; Siirola, John; Lowry, Thomas Stephen; Mitchiner, John Lovorn; Conrad, Stephen Hamilton; Kelic, Andjelka; Klise, Geoffrey T.; Strickland, James Hassler; Weddington, Anna Neila; Warren, Drake E.; Taylor, Mark A.; Loose, Verne W.; Richards, Elizabeth H.; Tidwell, Vincent Carroll; Horschel, Daniel S.; Vargas, Vanessa N.; Ehlen, Mark Andrew; Snyder, Lillian Annabelle; Stubblefield, William Anthony; Zagonel, Aldo A.; Reno, Marissa Devan; Trucano, Timothy Guy; Malczynski, Leonard A.; Roach, Jesse Dillon; Baker, Arnold Barry; Adams, Brian M.

2010-08-01T23:59:59.000Z

100

Assessing the near-term risk of climate uncertainty : interdependencies among the U.S. states.  

Science Conference Proceedings (OSTI)

Policy makers will most likely need to make decisions about climate policy before climate scientists have resolved all relevant uncertainties about the impacts of climate change. This study demonstrates a risk-assessment methodology for evaluating uncertain future climatic conditions. We estimate the impacts of climate change on U.S. state- and national-level economic activity from 2010 to 2050. To understand the implications of uncertainty on risk and to provide a near-term rationale for policy interventions to mitigate the course of climate change, we focus on precipitation, one of the most uncertain aspects of future climate change. We use results of the climate-model ensemble from the Intergovernmental Panel on Climate Change's (IPCC) Fourth Assessment Report 4 (AR4) as a proxy for representing climate uncertainty over the next 40 years, map the simulated weather from the climate models hydrologically to the county level to determine the physical consequences on economic activity at the state level, and perform a detailed 70-industry analysis of economic impacts among the interacting lower-48 states. We determine the industry-level contribution to the gross domestic product and employment impacts at the state level, as well as interstate population migration, effects on personal income, and consequences for the U.S. trade balance. We show that the mean or average risk of damage to the U.S. economy from climate change, at the national level, is on the order of $1 trillion over the next 40 years, with losses in employment equivalent to nearly 7 million full-time jobs.

Loose, Verne W.; Lowry, Thomas Stephen; Malczynski, Leonard A.; Tidwell, Vincent Carroll; Stamber, Kevin Louis; Reinert, Rhonda K.; Backus, George A.; Warren, Drake E.; Zagonel, Aldo A.; Ehlen, Mark Andrew; Klise, Geoffrey T.; Vargas, Vanessa N.

2010-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Hawaii electric system reliability.  

SciTech Connect

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 "worth" 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.

Silva Monroy, Cesar Augusto; Loose, Verne William

2012-09-01T23:59:59.000Z

102

Load Control for System Reliability and Measurement-Based Stability...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Load Control for System Reliability and Measurement-Based Stability Assessment Load Control for System Reliability and Measurement-Based Stability Assessment Research and develop...

103

Plan for the long term environmental assessment of geopressured resource development in the Louisiana Gulf Coast Region  

DOE Green Energy (OSTI)

Results of research to develop a plan for the long-term environmental assessment of geopressured/geothermal resource development in the Louisiana Gulf Coast region are reported. An overall view of the environmental issues facing decision-makers in the area of geopressured resource development is presented, along with a plan for monitoring potential environmental impacts. Separate assessments and plans are presented for geological effects, air and water quality, ecosystem quality, and socioeconomic and cultural considerations. (JGB)

Newchurch, E.J.; Bryan, C.F.; Harrison, D.P.; Muller, R.A.; Wilcox, R.E.; Bachman, A.L.; Newman, J.P.; Cunningham, K.J.; Hilding, R.K.; Rehage, J.A.

1978-07-15T23:59:59.000Z

104

Probabilistic safety assessment and reliability based maintenance policies: application to the emergency diesel generators of a nuclear power plant  

Science Conference Proceedings (OSTI)

This study is performed on the four 2.5 MWe emergency diesel generator (EDG) sets of Hydro-Quebec Gentilly-2 Nuclear Power Station. EDGs are safety related systems for the case of the loss of off-site power. This study establishes the basis of an enhanced ... Keywords: emergency diesel generator, maintenance policy, probabilistic safety assessment

Georges Abdul-Nour; Michel Demers; Raynald Vaillancourt

2002-06-01T23:59:59.000Z

105

comments to the draft Stakeholder Engagement Plan (SE-93) and the Terms of Reference of the Reliability Standards Auditing Working Group (“RSAWG”) regarding the Compliance Auditing of Reliability Standards for Ontario Market Participants. Hydro  

E-Print Network (OSTI)

One offers the following comments for your consideration: 1. The first objective listed on page 2 of the draft engagement plan states that the stakeholder engagement’s goal is to provide “…stakeholders the opportunity to provide feedback to MACD on their business needs around the auditing process (e.g. audit preparation materials, timing of deadlines, etc). ” However, on page 1 of the plan, items such as evidentiary requirements and disclosure of audit results are listed as “Out of Scope”. Hydro One submits that these items and others are important parts of the audit process and should be discussed and agreed on so Ontario entities can prepare accordingly. 2. The last bullet in the Terms of Reference document states that the Working Group is meant to provide advice and as a result consensus is not a goal of the engagement. Hydro One submits that, considering that Market Rule amendments will need to be in place (including Stakeholders Engagement, Technical Panel and IESO Board of Directors approval) to allow MACD to proceed with audit activities in Ontario, the RSAWG is the appropriate group to discuss and reach

unknown authors

2011-01-01T23:59:59.000Z

106

Fuel Reliability Program: Post-Irradiation Examination and Performance Assessment of ATRIUM-10 BWR Fuel from Browns Ferry-3 Reactor  

Science Conference Proceedings (OSTI)

ATRIUM-10 design (10x10 lattice) fuel was irradiated for one 24-month period during Cycle 12 to 25 MWd/kgU rod-average exposure at Tennessee Valley Authority's Browns Ferry Unit 3 reactor. The project goal was to characterize the behavior of modern boiling water reactor (BWR) fuel at low exposures to assess early-life performance in a well-documented reactor environment. This report includes results from hot cell post-irradiation examinations. In a future Electric Power Research Institute (EPRI) report, ...

2011-06-09T23:59:59.000Z

107

Assessing initial-cost growth and subsequent long-term cost improvement in coal-to-SNG processes. Final report  

Science Conference Proceedings (OSTI)

The overall objective of the study was the development of guidance that would enable gas-industry R and D managers to make more-reliable assessments of the potential for both initial-cost growth and subsequent long-run cost improvement in alternative coal-gasification technologies. The first phase of the research assessed the reasonableness of the GRI contingency methodology by comparing the results obtained from applying the GRI method and the RAND Pioneer Plant Study (PPS) method to an identical set of eight coal-to-SNG processes. The second phase of the research, which addressed the issue of cost improvement, found that between process introduction and process maturity, overall cost reductions of between 30% (for moderately innovative technologies) and 60% (for highly innovative technologies) are possible. However, these results were highly dependent on a number of key assumptions including: similarity of site characteristics for successive plants; access to prior plant's experience base; and appropriate management attitudes.

Hess, R.W.; Myers, C.W.

1989-06-01T23:59:59.000Z

108

What Can Meta-Analyses Tell Us About the Reliability of Life Cycle Assessment for Decision Support?  

DOE Green Energy (OSTI)

The body of life cycle assessment (LCA) literature is vast and has grown over the last decade at a dauntingly rapid rate. Many LCAs have been published on the same or very similar technologies or products, in some cases leading to hundreds of publications. One result is the impression among decision makers that LCAs are inconclusive, owing to perceived and real variability in published estimates of life cycle impacts. Despite the extensive available literature and policy need formore conclusive assessments, only modest attempts have been made to synthesize previous research. A significant challenge to doing so are differences in characteristics of the considered technologies and inconsistencies in methodological choices (e.g., system boundaries, coproduct allocation, and impact assessment methods) among the studies that hamper easy comparisons and related decision support. An emerging trend is meta-analysis of a set of results from LCAs, which has the potential to clarify the impacts of a particular technology, process, product, or material and produce more robust and policy-relevant results. Meta-analysis in this context is defined here as an analysis of a set of published LCA results to estimate a single or multiple impacts for a single technology or a technology category, either in a statistical sense (e.g., following the practice in the biomedical sciences) or by quantitative adjustment of the underlying studies to make them more methodologically consistent. One example of the latter approach was published in Science by Farrell and colleagues (2006) clarifying the net energy and greenhouse gas (GHG) emissions of ethanol, in which adjustments included the addition of coproduct credit, the addition and subtraction of processes within the system boundary, and a reconciliation of differences in the definition of net energy metrics. Such adjustments therefore provide an even playing field on which all studies can be considered and at the same time specify the conditions of the playing field itself. Understanding the conditions under which a meta-analysis was conducted is important for proper interpretation of both the magnitude and variability in results. This special supplemental issue of the Journal of Industrial Ecology includes 12 high-quality metaanalyses and critical reviews of LCAs that advance understanding of the life cycle environmental impacts of different technologies, processes, products, and materials. Also published are three contributions on methodology and related discussions of the role of meta-analysis in LCA. The goal of this special supplemental issue is to contribute to the state of the science in LCA beyond the core practice of producing independent studies on specific products or technologies by highlighting the ability of meta-analysis of LCAs to advance understanding in areas of extensive existing literature. The inspiration for the issue came from a series of meta-analyses of life cycle GHG emissions from electricity generation technologies based on research from the LCA Harmonization Project of the National Renewable Energy Laboratory (NREL), a laboratory of the U.S. Department of Energy, which also provided financial support for this special supplemental issue. (See the editorial from this special supplemental issue [Lifset 2012], which introduces this supplemental issue and discusses the origins, funding, peer review, and other aspects.) The first article on reporting considerations for meta-analyses/critical reviews for LCA is from Heath and Mann (2012), who describe the methods used and experience gained in NREL's LCA Harmonization Project, which produced six of the studies in this special supplemental issue. Their harmonization approach adapts key features of systematic review to identify and screen published LCAs followed by a meta-analytical procedure to adjust published estimates to ones based on a consistent set of methods and assumptions to allow interstudy comparisons and conclusions to be made. In a second study on methods, Zumsteg and colleagues (2012) propose a checklist for a sta

Brandao, M.; Heath, G.; Cooper, J.

2012-04-01T23:59:59.000Z

109

Achieving Energy Reliability TOGETHER. Achieving Energy Reliability...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Achieving Energy Reliability TOGETHER. Achieving Energy Reliability TOGETHER. 2010 STRATEGIC PLAN June 2010 TABLE OF CONTENTS OE's Declaration . . . . . . . . . . . . . . . . . . ....

110

PWR Activity Transport and Source Term Assessment: Surface Activity Concentrations by Gamma Scanning  

Science Conference Proceedings (OSTI)

Measurement of surface isotopic concentrations, known as gamma scanning in the United States, is an invaluable tool in assessing variations in shutdown dose rates and the impacts of chemistry and operational changes.

2011-07-25T23:59:59.000Z

111

Definition: Regional Reliability Plan | Open Energy Information  

Open Energy Info (EERE)

reliability Coordinator References Glossary of Terms Used in Reliability Standards An i LikeLike UnlikeLike You like this.Sign Up to see what your friends like. nline...

112

Boiler Reliability Optimization: Interim Guideline  

Science Conference Proceedings (OSTI)

Competitive pressures to drive costs down in the new business environment sometimes conflict with the demands of increased reliability and quality of supply. The Boiler Reliability Optimization program, which makes use of a number of applicable EPRI technologies, was developed to assess, create, and implement an effective boiler maintenance strategy for the changing business environment.

1999-11-30T23:59:59.000Z

113

Measurement Practices for Reliability and Power Quality  

DOE Green Energy (OSTI)

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

Kueck, JD

2005-05-06T23:59:59.000Z

114

Measurement Practices for Reliability and Power Quality  

SciTech Connect

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

Kueck, JD

2005-05-06T23:59:59.000Z

115

Long-Term Performance Data and Analysis of CIS/CIGS Modules Deployed Outdoors (Presentation)  

DOE Green Energy (OSTI)

The long-term performance data of copper indium diselenide (CIS) and gallium-alloyed CIS (CIGS) photovoltaic (PV) modules are investigated to assess the reliability of this technology.

del Cueto, J. A.; Kroposki, B.; Rummel, S.; Anderberg, A.

2008-08-10T23:59:59.000Z

116

Long-Term Performance Data and Analysis of CIS/CIGS Modules Deployed Outdoors  

DOE Green Energy (OSTI)

The long-term performance data of copper indium diselenide (CIS) and gallium-alloyed CIS (CIGS) photovoltaic (PV) modules are investigated to assess the reliability of this technology.

del Cueto, J.A.; Rummel, S.; Kroposki, B.; Anderberg, A.

2008-11-01T23:59:59.000Z

117

Accuracy assessment of solar system performance projection based on short-term data acquisition as compared to seasonal results from the National Solar Data Network  

Science Conference Proceedings (OSTI)

Considerable interest has been placed on the assessment of solar thermal performance based on data acquired during short-term monitoring periods of up to two weeks time. This paper utilizes the measured long-term performance data available from the National Solar Data Network (NSDN) to assess the accuracy of projected thermal performance factors which are based on short-term data acquisition. 7 refs.

Kendall, P.W.

1981-01-01T23:59:59.000Z

118

Long-Term Benthic Macroinvertebrate Community Monitoring to Assess Pollution Abatement Effectiveness  

SciTech Connect

The benthic macroinvertebrate community of East Fork Poplar Creek (EFPC) in East Tennessee was monitored for 18 years to evaluate the effectiveness of a water pollution control program implemented at a major United States (U.S.) Department of Energy facility. Several actions were implemented to reduce and control releases of pollutants into the headwaters of the stream. Four of the most significant actions were implemented during different time periods, which allowed assessment of each action. Macroinvertebrate samples were collected annually in April from three locations in EFPC (EFK24, EFK23, and EFK14) and two nearby reference streams from 1986 through 2003. Significant improvements occurred in the macroinvertebrate community at the headwater sites (EFK24 and EFK23) after implementation of each action, while changes detected 9 km further downstream (EFK14) could not be clearly attributed to any of the actions. Because the stream was impacted at its origin, invertebrate recolonization was primarily limited to aerial immigration, thus, recovery has been slow. As recovery progressed, abundances of small pollution-tolerant taxa (e.g., Orthocladiinae chironomids) decreased and longer lived taxa colonized (e.g., hydropsychid caddisflies, riffle beetles, Baetis). While assessments lasting three to four years may be long enough to detect a response to new pollution controls at highly impacted locations, more time may be needed to understand the full effects. Studies on the effectiveness of pollution controls can be improved if impacted and reference sites are selected to maximize spatial and temporal trending, and if a multidisciplinary approach is used to broadly assess environmental responses (e.g., water quality trends, invertebrate and fish community assessments, toxicity testing, etc.).

Smith, John G [ORNL; Brandt, Craig C [ORNL; Christensen, Sigurd W [ORNL

2011-01-01T23:59:59.000Z

119

Assessing Long-Term Wind Conditions by Combining Different Measure-Correlate-Predict Algorithms: Preprint  

DOE Green Energy (OSTI)

This paper significantly advances the hybrid measure-correlate-predict (MCP) methodology, enabling it to account for variations of both wind speed and direction. The advanced hybrid MCP method uses the recorded data of multiple reference stations to estimate the long-term wind condition at a target wind plant site. The results show that the accuracy of the hybrid MCP method is highly sensitive to the combination of the individual MCP algorithms and reference stations. It was also found that the best combination of MCP algorithms varies based on the length of the correlation period.

Zhang, J.; Chowdhury, S.; Messac, A.; Hodge, B. M.

2013-08-01T23:59:59.000Z

120

Definition: Transmission Reliability | Open Energy Information  

Open Energy Info (EERE)

to ensure reliable system operation as system conditions change.1 Related Terms transmission lines, transfer capability, system, transmission line References Glossary...

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Reliability evaluation of smart distribution grids.  

E-Print Network (OSTI)

??The term "Smart Grid" generally refers to a power grid equipped with the advanced technologies dedicated for purposes such as reliability improvement, ease of control… (more)

Kazemi, Shahram

2011-01-01T23:59:59.000Z

122

NREL: Gearbox Reliability Collaborative - Gearbox Reliability Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Publications Publications Screenshot of the cover of an NREL report, titled Gearbox Reliability Collaborative Project Report: Findings from Phase 1 and Phase 2 testing. The NREL wind research program's Gearbox Reliability Collaborative publishes reports and presentations of its activities. General Gearbox Reliability Collaborative Phase 3 Gearbox 2 Test Plan 2013 DOE/NREL Gearbox Reliability Collaborative: All Members Meeting Agenda 2012 Gearbox Reliability Collaborative Phase 1 and 2: Testing and Modeling Results 2012 Gearbox Reliability Collaborative Update: A Brief (Presentation) Jan 2012 Gearbox Reliability Collaborative Update (Presentation) April 2012 NREL Collaborates to Improve Wind Turbine Technology (Fact Sheet) 2012 Gearbox Reliability Collaborative - Phase 1 and 2 Overview

123

Achieving Energy Reliability TOGETHER. Achieving Energy Reliability...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Achieving Energy Reliability TOGETHER. Achieving Energy Reliability TOGETHER. 2010 STRATEGIC PLAN June 2010 This plan reflects OE's ongoing development of a strategy to achieve the...

124

Assessing the Long-Term System Value of Intermittent Electric Generation Technologies  

SciTech Connect

This research investigates the economic penetration and system-wide effects of large-scale intermittent technologies in an electric generation system. The research extends the standard screening curve analysis to optimize the penetration and system structure with intermittent technologies. The analysis is based on hour-by-hour electric demands and intermittent generation. A theoretical framework is developed to find an expression for the marginal value of an intermittent technology as a function of the average system marginal cost, the capacity factor of the generator, and the covariance between the generator's hourly production and the hourly system marginal cost. A series of model runs are made examining the penetration of wind and photovoltaic in a simple electric generation system. These illustrate the conclusions in the theoretical analysis and illustrate the effects that large-scale intermittent penetration has on the structure of the generation system. In the long-term, adding intermittent generation to a system allows us to restructure the dispatchable generation capacity to a mix with lower capital cost. It is found that large scale intermittent generation tends to reduce the optimal capacity and production of baseload generators and increase the capacity and production of intermediate generators, although the extent to which this occurs depends strongly on the pattern of production from the intermediate generators. It is also shown that the marginal value of intermittent generation declines as it penetrates. The analysis investigates the specific mechanism through which this occurs.

Lamont, A D

2005-08-24T23:59:59.000Z

125

Assessing the Long-Term System Value of Intermittent Electric Generation Technologies  

DOE Green Energy (OSTI)

This research investigates the economic penetration and system-wide effects of large-scale intermittent technologies in an electric generation system. The research extends the standard screening curve analysis to optimize the penetration and system structure with intermittent technologies. The analysis is based on hour-by-hour electric demands and intermittent generation. A theoretical framework is developed to find an expression for the marginal value of an intermittent technology as a function of the average system marginal cost, the capacity factor of the generator, and the covariance between the generator's hourly production and the hourly system marginal cost. A series of model runs are made examining the penetration of wind and photovoltaic in a simple electric generation system. These illustrate the conclusions in the theoretical analysis and illustrate the effects that large-scale intermittent penetration has on the structure of the generation system. In the long-term, adding intermittent generation to a system allows us to restructure the dispatchable generation capacity to a mix with lower capital cost. It is found that large scale intermittent generation tends to reduce the optimal capacity and production of baseload generators and increase the capacity and production of intermediate generators, although the extent to which this occurs depends strongly on the pattern of production from the intermediate generators. It is also shown that the marginal value of intermittent generation declines as it penetrates. The analysis investigates the specific mechanism through which this occurs.

Lamont, A D

2005-08-24T23:59:59.000Z

126

Assessment of children's long-term exposure to magnetic fields (the Enertech study)  

SciTech Connect

The objective of this study was to evaluate whether engineering approaches to estimating residential fields due to ground currents and outdoor line currents provide a valid basis for assessing magnetic field exposure. Investigators selected 35 homes representing a range of external utility wiring and home grounding characteristics. During two visits to the study houses about half a year apart, they measured ground currents, indoor magnetic fields (both 24-hour and spot), outdoor magnetic field profiles, and using a three-axis integrating meter (the AMEX-3D) also measured personal exposure. They also collected data on residential power consumption and utility load on the distribution system during the measurement period. The investigators tested whether engineering-based exposure estimates correlated with those measured on the AMEX-3D. Time-weighted-average (TWA) magnetic field exposure as recorded on the AMEX-3D correlated significantly with both the power consumed within individual residences and the power flowing on the utility distribution system. Spot-measured fields were also associated with these quantities. However, compared with the use of spot-measured fields or the Wertheimer-Leeper wiring code, the model incorporating residential consumption and utility loading did not improve the predictability of personal exposure. In addition, temporal variation in the consumption/loading data was not useful in predicting temporal differences in exposure patterns. Despite the statistically significant correlations of spot-measured fields with exposure during the same or even the other of two visits, personal exposures during the two visits were poorly correlated.

Kaune, W.T.; Zaffanella, L.E.

1992-11-01T23:59:59.000Z

127

Small integrating meter for assessing long-term exposure to magnetic fields  

Science Conference Proceedings (OSTI)

A small, lightweight meter has been developed for magnetic-field measurements, particularly those needed for exposure-assessment purposes. This meter, known as the AMEX-3D, continuously measures all three axes of magnetic-flux density and electronically combines the data into a single estimate of cumulative exposure to the root-mean-square (rms) resultant flux density. The AMEX-3D weighs about 120 g, measures 2.7 cm x 5.1 cm x 10.2 cm, and is battery powered. Two panel-mounted jacks are provided for measuring battery voltage and for reading cumulative exposure data from the unit. The instrument has, within 3 dB, a flat response to magnetic flux densities at all frequencies in its 30-1,000 Hz bandwidth. A detailed analysis of error sources in the AMEX-3D leads to an estimate of [plus minus] 20% as the accuracy of the instrument over its dynamic range, which extends from 0.02 to 15 microT. The AMEX-3D was tested in the field by asking electric-utility distribution linemen to wear AMEX-3D and EMDEX meters simultaneously while working. Agreement between the two measures of exposure was excellent.

Kaune, W.T.; Niple, J.C.; Liu, M.J.; Silva, J.M. (Enertech Consultants, Campbell, CA (United States))

1992-01-01T23:59:59.000Z

128

Incorporating long-term climate change in performance assessment for the Waste Isolation Pilot Plant  

SciTech Connect

The United States Department of Energy (DOE) is developing the Waste Isolation Pilot Plant (WIPP) in southeastern New Mexico for the disposal of transuranic wastes generated by defense programs. Applicable regulations (40 CFR 191) require the DOE to evaluate disposal-system performance for 10,000 yr. Climatic changes may affect performance by altering groundwater flow. Paleoclimatic data from southeastern New Mexico and the surrounding area indicate that the wettest and coolest Quaternary climate at the site can be represented by that at the last glacial maximum, when mean annual precipitation was approximately twice that of the present. The hottest and driest climates have been similar to that of the present. The regularity of global glacial cycles during the late Pleistocene confirms that the climate of the last glacial maximum is suitable for use as a cooler and wetter bound for variability during the next 10,000 yr. Climate variability is incorporated into groundwater-flow modeling for WIPP PA by causing hydraulic head in a portion of the model-domain boundary to rise to the ground surface with hypothetical increases in precipitation during the next 10,000 yr. Variability in modeled disposal-system performance introduced by allowing head values to vary over this range is insignificant compared to variability resulting from other causes, including incomplete understanding of transport processes. Preliminary performance assessments suggest that climate variability will not affect regulatory compliance.

Swift, P.N. [Sandia National Labs., Albuquerque, NM (United States); Baker, B.L. [Technadyne Engineering Consultants, Inc., Albuquerque, NM (United States); Economy, K. [Ecodynamics Research Associates, Albuquerque, NM (United States); Garner, J.W. [Applied Physics, Inc., Albuquerque, NM (United States); Helton, J.C. [Arizona State Univ., Tempe, AZ (United States); Rudeen, D.K. [New Mexico Engineering Research Inst., Albuquerque, NM (United States)

1993-09-18T23:59:59.000Z

129

Grid reliability management tools  

SciTech Connect

To summarize, Consortium for Electric Reliability Technology Solutions (CERTS) is engaged in a multi-year program of public interest R&D to develop and prototype software tools that will enhance system reliability during the transition to competitive markets. The core philosophy embedded in the design of these tools is the recognition that in the future reliability will be provided through market operations, not the decisions of central planners. Embracing this philosophy calls for tools that: (1) Recognize that the game has moved from modeling machine and engineering analysis to simulating markets to understand the impacts on reliability (and vice versa); (2) Provide real-time data and support information transparency toward enhancing the ability of operators and market participants to quickly grasp, analyze, and act effectively on information; (3) Allow operators, in particular, to measure, monitor, assess, and predict both system performance as well as the performance of market participants; and (4) Allow rapid incorporation of the latest sensing, data communication, computing, visualization, and algorithmic techniques and technologies.

Eto, J.; Martinez, C.; Dyer, J.; Budhraja, V.

2000-10-01T23:59:59.000Z

130

Definition: Regional Reliability Organization | Open Energy Informatio...  

Open Energy Info (EERE)

Terms Bulk Electric System References Glossary of Terms Used in Reliability Standards An LikeLike UnlikeLike You like this.Sign Up to see what your friends like. inline...

131

Definition: Adverse Reliability Impact | Open Energy Information  

Open Energy Info (EERE)

a widespread area of the Interconnection.1 Related Terms smart grid References Glossary of Terms Used in Reliability Standards An LikeLike UnlikeLike You like this.Sign Up...

132

Definition: Interconnection Reliability Operating Limit | Open...  

Open Energy Info (EERE)

Terms System Operating Limit, System, Cascading Outage, smart grid References Glossary of Terms Used in Reliability Standards An inl LikeLike UnlikeLike You like this.Sign...

133

Sandia National Laboratories performance assessment methodology for long-term environmental programs : the history of nuclear waste management.  

SciTech Connect

Sandia National Laboratories (SNL) is the world leader in the development of the detailed science underpinning the application of a probabilistic risk assessment methodology, referred to in this report as performance assessment (PA), for (1) understanding and forecasting the long-term behavior of a radioactive waste disposal system, (2) estimating the ability of the disposal system and its various components to isolate the waste, (3) developing regulations, (4) implementing programs to estimate the safety that the system can afford to individuals and to the environment, and (5) demonstrating compliance with the attendant regulatory requirements. This report documents the evolution of the SNL PA methodology from inception in the mid-1970s, summarizing major SNL PA applications including: the Subseabed Disposal Project PAs for high-level radioactive waste; the Waste Isolation Pilot Plant PAs for disposal of defense transuranic waste; the Yucca Mountain Project total system PAs for deep geologic disposal of spent nuclear fuel and high-level radioactive waste; PAs for the Greater Confinement Borehole Disposal boreholes at the Nevada National Security Site; and PA evaluations for disposal of high-level wastes and Department of Energy spent nuclear fuels stored at Idaho National Laboratory. In addition, the report summarizes smaller PA programs for long-term cover systems implemented for the Monticello, Utah, mill-tailings repository; a PA for the SNL Mixed Waste Landfill in support of environmental restoration; PA support for radioactive waste management efforts in Egypt, Iraq, and Taiwan; and, most recently, PAs for analysis of alternative high-level radioactive waste disposal strategies including repositories deep borehole disposal and geologic repositories in shale and granite. Finally, this report summarizes the extension of the PA methodology for radioactive waste disposal toward development of an enhanced PA system for carbon sequestration and storage systems. These efforts have produced a generic PA methodology for the evaluation of waste management systems that has gained wide acceptance within the international community. This report documents how this methodology has been used as an effective management tool to evaluate different disposal designs and sites; inform development of regulatory requirements; identify, prioritize, and guide research aimed at reducing uncertainties for objective estimations of risk; and support safety assessments.

Marietta, Melvin Gary; Anderson, D. Richard; Bonano, Evaristo J.; Meacham, Paul Gregory (Raytheon Ktech, Albuquerque, NM)

2011-11-01T23:59:59.000Z

134

2012 Annual Planning Summary for Electricity Delivery and Energy Reliability  

Energy.gov (U.S. Department of Energy (DOE))

The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2012 and 2013 within Electricity Delivery and Energy Reliability.

135

Definition: Reliability Coordinator Information System | Open Energy  

Open Energy Info (EERE)

Reliability Coordinator Information System Reliability Coordinator Information System Jump to: navigation, search Dictionary.png Reliability Coordinator Information System The system that Reliability Coordinators use to post messages and share operating information in real time.[1] Related Terms Reliability Coordinator References ↑ Glossary of Terms Used in Reliability Standards An LikeLike UnlikeLike You like this.Sign Up to see what your friends like. inline Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Reliability_Coordinator_Information_System&oldid=480407" Categories: Definitions ISGAN Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load)

136

Executive summary for assessing the near-term risk of climate uncertainty : interdependencies among the U.S. states.  

Science Conference Proceedings (OSTI)

Policy makers will most likely need to make decisions about climate policy before climate scientists have resolved all relevant uncertainties about the impacts of climate change. This study demonstrates a risk-assessment methodology for evaluating uncertain future climatic conditions. We estimate the impacts of climate change on U.S. state- and national-level economic activity from 2010 to 2050. To understand the implications of uncertainty on risk and to provide a near-term rationale for policy interventions to mitigate the course of climate change, we focus on precipitation, one of the most uncertain aspects of future climate change. We use results of the climate-model ensemble from the Intergovernmental Panel on Climate Change's (IPCC) Fourth Assessment Report 4 (AR4) as a proxy for representing climate uncertainty over the next 40 years, map the simulated weather from the climate models hydrologically to the county level to determine the physical consequences on economic activity at the state level, and perform a detailed 70-industry analysis of economic impacts among the interacting lower-48 states. We determine the industry-level contribution to the gross domestic product and employment impacts at the state level, as well as interstate population migration, effects on personal income, and consequences for the U.S. trade balance. We show that the mean or average risk of damage to the U.S. economy from climate change, at the national level, is on the order of $1 trillion over the next 40 years, with losses in employment equivalent to nearly 7 million full-time jobs.

Loose, Verne W.; Lowry, Thomas Stephen; Malczynski, Leonard A.; Tidwell, Vincent Carroll; Stamber, Kevin Louis; Reinert, Rhonda K.; Backus, George A.; Warren, Drake E.; Zagonel, Aldo A.; Ehlen, Mark Andrew; Klise, Geoffrey T.; Vargas, Vanessa N.

2010-04-01T23:59:59.000Z

137

Soil-to-Crop Transfer Factors of Naturally Occurring Radionuclides and Stable Elements for Long-Term Dose Assessment  

SciTech Connect

A soil-to-crop transfer factor, TF, is a key parameter that directly affects the internal dose assessment for the ingestion pathway, however, obtaining TFs of various long-lived radionuclides occurred during operation of nuclear power plants is difficult because most of them could not be found in natural environments. In this study, therefore, we collected crops and their associated soils throughout Japan and measured more than 50 elements to obtain TFs under equilibrium conditions. The TFs were calculated for 42 elements (Li, Na, Mg, Al, Si, P, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Rb, Sr, Y, Mo, Cd, Sn, I, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tl, Pb, Th and U) from their concentrations in both crop and soil samples. The TF is defined as the concentration of an isotope in a crop (in Bq/kg or mg/kg dry weight) divided by the concentration of the isotope in soil (in Bq.kg or mg/kg dry weight). Probability distributions of TFs for 62 upland field crops were usually log-normal type so that geometric means (GMs) were calculated. The values for the elements of interest from the viewpoint of long-term dose assessment were 2.5E-02 for Se, 7.9E-02 for Sr, 3.1E-03 for Cs, 4.2E-04 for Th and 4.6E-04 for U. Leafy vegetable showed the highest TFs for all the elements among the crop groups. It was clear that these data were usually within the 95% confidence limits of TFs compiled by IAEA in Technical Report Series 364. (authors)

Uchida, S.; Tagami, K. [National Institute of Radiological Sciences, Inage-ku, Chiba (Japan)

2007-07-01T23:59:59.000Z

138

Electricity & Energy Reliability  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ENERGY RELIABILITY Human Capital Management Strategic Plan FY2007 Office of Electricity Delivery and Energy Reliability Human Capital Management Strategic Plan September 2006...

139

CRAX/Cassandra Reliability Analysis Software  

SciTech Connect

Over the past few years Sandia National Laboratories has been moving toward an increased dependence on model- or physics-based analyses as a means to assess the impact of long-term storage on the nuclear weapons stockpile. These deterministic models have also been used to evaluate replacements for aging systems, often involving commercial off-the-shelf components (COTS). In addition, the models have been used to assess the performance of replacement components manufactured via unique, small-lot production runs. In either case, the limited amount of available test data dictates that the only logical course of action to characterize the reliability of these components is to specifically consider the uncertainties in material properties, operating environment etc. within the physics-based (deterministic) model. This not only provides the ability to statistically characterize the expected performance of the component or system, but also provides direction regarding the benefits of additional testing on specific components within the system. An effort was therefore initiated to evaluate the capabilities of existing probabilistic methods and, if required, to develop new analysis methods to support the inclusion of uncertainty in the classical design tools used by analysts and design engineers at Sandia. The primary result of this effort is the CMX (Cassandra Exoskeleton) reliability analysis software.

Robinson, D.

1999-02-10T23:59:59.000Z

140

Reliability and Functional Availability of HVAC Systems  

E-Print Network (OSTI)

This paper presents a model to calculate the reliability and availability of heating, ventilation and air conditioning systems. The reliability is expressed in the terms of reliability, maintainability and decision capability. These terms are a function of the mean time between failure, mean time to repair and decision time. The availability is expressed as an operational and functional availability of the systems. These terms are a function of both the technical and human characteristics to maintain the systems in correct operational state. The result is based on a large amount data from operational organisations, the compulsory inspection of ventilation systems and momentary and continuous measurements made in HVAC-systems.

Myrefelt, S.

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

2013 Reliability & Markets Peer Review | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

2013 Reliability & Markets Peer Review 2013 Reliability & Markets Peer Review 2013 Reliability & Markets Peer Review The Transmission Reliability R&D Reliability & Markets Peer Review included 13 presentations over 2 days on August 6 - 7, 2013 at Cornell University in Ithaca, NY. Presentations are available through the links. The agenda and list of presentations are included below. The Reliability and Markets activity of the Transmission Reliability program researches, develops, and implements electricity infrastructure and market simulations that integrate economics and engineering principles. The activity helps to ensure electric reliability, while also improving the efficiency and economics of market operations. Day 1: August 6 Session I Transmission Investment Assessment Under Uncertainty, Ben Hobbs,

142

Power electronics reliability analysis.  

SciTech Connect

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

Smith, Mark A.; Atcitty, Stanley

2009-12-01T23:59:59.000Z

143

Auto reliability project  

Science Conference Proceedings (OSTI)

Reliability is defined as the probability that an item (system, subsystem, or component) performs according to specifications. When test data are sparse (such as with a new concept design), expert judgment can be used to estimate reliability. Using expert ...

Jane M. Booker; Thomas R. Bement

2002-01-01T23:59:59.000Z

144

NREL: Gearbox Reliability Collaborative - Gearbox Reliability Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

All Members Meeting All Members Meeting The Gearbox Reliability Collaborative (GRC) All Members Meeting was held on February 4-5, 2013. The meeting covered advancements made across the NREL GRC project and the latest industry updates on gearbox reliability and operations and maintenance practices. The presentations covered gearbox design updates, gearbox testing updates, experimental data analysis, and operations and maintenance research. Presentations Monday, February 4 Time Presenter Organization Presentation 8:30 a.m. Paul Veers NREL Welcome 8:45 a.m. Mike Derby DOE Overview 9:05 a.m. Jon Keller NREL Gearbox Reliability Collaborative Status and Plans 9:20 a.m. Hal Link NREL New Gearbox #2 Test Plan 9:40 a.m. Hal Link NREL NWTC Dynos and Grid Simulator 10:00 a.m. Jon Keller/Brian McNiff NREL/MLI Gearbox Reliability Collaborative, Phase 3: High Speed Shaft Bearing Loads

145

Increasing the Reliability of Reliability Diagrams  

Science Conference Proceedings (OSTI)

The reliability diagram is a common diagnostic graph used to summarize and evaluate probabilistic forecasts. Its strengths lie in the ease with which it is produced and the transparency of its definition. While visually appealing, major long-...

Jochen Bröcker; Leonard A. Smith

2007-06-01T23:59:59.000Z

146

Definition: Reliability Coordinator Area | Open Energy Information  

Open Energy Info (EERE)

Coordinator Area Coordinator Area Jump to: navigation, search Dictionary.png Reliability Coordinator Area The collection of generation, transmission, and loads within the boundaries of the Reliability Coordinator. Its boundary coincides with one or more Balancing Authority Areas.[1] Related Terms transmission lines, Reliability Coordinator, Balancing Authority Area, transmission line, balancing authority, smart grid References ↑ Glossary of Terms Used in Reliability Standards An inlin LikeLike UnlikeLike You like this.Sign Up to see what your friends like. e Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Reliability_Coordinator_Area&oldid=502626" Categories: Definitions ISGAN Definitions What links here Related changes Special pages

147

A system dynamics model for the screening-level long-term assessment of human health risks at contaminated sites  

Science Conference Proceedings (OSTI)

For the design of sustainable and cost-effective management strategies for contaminated sites, decision makers need appropriate tools, i.e. environmental decision support systems to assist them in the planning, assessment, selection and optimisation ... Keywords: Contaminated sites, EDSS, Human health risk assessment, Monitored natural attenuation, Risk-based land management, System dynamics, Uncertainty, Vensim

Ursula S. Mcknight; Michael Finkel

2013-02-01T23:59:59.000Z

148

Architectural design for reliability  

DOE Green Energy (OSTI)

Design-for-reliability concepts can be applied to the products of the construction industry, which includes buildings, bridges, transportation systems, dams, and other structures. The application of a systems approach to designing in reliability emphasizes the importance of incorporating uncertainty in the analyses, the benefits of optimization analyses, and the importance of integrating reliability, safety, and security. 4 refs., 3 figs.

Cranwell, R.M.; Hunter, R.L.

1997-08-01T23:59:59.000Z

149

Materials Reliability Program: Risk Assessment of ASME Section XI Appendix G Pressure-Temperature (P-T) Limit Curve Methodologies (M RP-368)  

Science Conference Proceedings (OSTI)

This report presents the results of an assessment of the conditional probability of reactor pressure vessel (RPV) failure in pressurized water reactors (PWRs) when normal RPV heatup and cooldown occur along operational constraint boundaries. These boundaries are defined by the maximum allowable pressures determined from regulatory requirements, the evaluation procedures in Appendix G to Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (Appendix G), ...

2013-12-09T23:59:59.000Z

150

Materials Reliability Program: An Assessment of the Control Rod Drive Mechanism (CRDM) Alloy 600 Reactor Vessel Head Penetration PWS CC Remedial Techniques (MRP-61)  

Science Conference Proceedings (OSTI)

Service experience over the past decade with control rod drive mechanism (CRDM) penetrations in pressurized water reactors (PWRs) worldwide confirmed primary water stress corrosion cracking (PWSCC) in alloy 600 base metal at several plants. This report summarizes the evaluations and results of an autoclave-accelerated stress corrosion cracking (SCC) test program designed to assess the effectiveness of selected surface remedial techniques to mitigate alloy 600 PWSCC in PWR vessel head penetration base and...

2003-07-14T23:59:59.000Z

151

Materials Reliability Program: Testing and Evaluation of Reactor Pressure Vessel Steel Plate Heat JRQ to Assess Through-Wall Attenua tion of Radiation Embrittlement (MRP-243)  

Science Conference Proceedings (OSTI)

The change in neutron energy spectrum through the wall of a reactor pressure vessel (RPV) requires the use of an exposure parameter or metric for assessing radiation embrittlement. This report looks at experimental fracture toughness and Charpy V-notch (CVN) data generated in a special International Atomic Energy Agency (IAEA) experiment designed to simulate an RPV wall of 190 mm thickness. These experimental data are compared with the current exposure metric of displacements per atom (dpa) coupled with ...

2008-12-23T23:59:59.000Z

152

Materials Reliability Program: Testing and Evaluation of Two Reactor Pressure Vessel Steels Irradiated to Assess Through-Wall Attenu ation of Radiation Embrittlement (MRP-203)  

Science Conference Proceedings (OSTI)

The change in neutron energy spectrum through the wall of a reactor pressure vessel (RPV) requires the use of an exposure parameter or metric for assessing radiation embrittlement. This report looks at experimental fracture toughness and Charpy V-notch data generated in a special International Atomic Energy Agency (IAEA) experiment designed to simulate an RPV wall of 180-mm thickness. These experimental data are compared with the current exposure metric of displacements per atom (dpa) coupled with an emb...

2006-10-04T23:59:59.000Z

153

Comments of North American Electric Reliability Corporation (NERC) to DOE  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

North American Electric Reliability Corporation (NERC) North American Electric Reliability Corporation (NERC) to DOE Smart Grid RFI: Addressing Policy and Logistical Challenges Comments of North American Electric Reliability Corporation (NERC) to DOE Smart Grid RFI: Addressing Policy and Logistical Challenges Response to the Department of Energy's ("DOE") Request for Information (RFI) regarding the "Smart Grid RFI: Addressing Policy and Logistical Challenges." The North American Electric Reliability Corporation's ("NERC") Reliability Assessment and Performance Analysis Group ("RAPA") is currently developing a report, entitled "Reliability Consideration from Integration of Smart Grid" that will address many of the issues raised in the DOE RFI. North American Electric Reliability Corporation (NERC)

154

The development of a realistic source term for sodium-cooled fast reactors : assessment of current status and future needs.  

Science Conference Proceedings (OSTI)

Sodium-cooled fast reactors (SFRs) continue to be proposed and designed throughout the United States and the world. Although the number of SFRs actually operating has declined substantially since the 1980s, a significant interest in advancing these types of reactor systems remains. Of the many issues associated with the development and deployment of SFRs, one of high regulatory importance is the source term to be used in the siting of the reactor. A substantial amount of modeling and experimental work has been performed over the past four decades on accident analysis, sodium coolant behavior, and radionuclide release for SFRs. The objective of this report is to aid in determining the gaps and issues related to the development of a realistic, mechanistically derived source term for SFRs. This report will allow the reader to become familiar with the severe accident source term concept and gain a broad understanding of the current status of the models and experimental work. Further, this report will allow insight into future work, in terms of both model development and experimental validation, which is necessary in order to develop a realistic source term for SFRs.

LaChance, Jeffrey L.; Phillips, Jesse; Parma, Edward J., Jr.; Olivier, Tara Jean; Middleton, Bobby D.

2011-06-01T23:59:59.000Z

155

Network location of a reliable center using the most reliable route policy  

Science Conference Proceedings (OSTI)

This paper considers a single location on an undirected network with unreliable edges that maximizes the lowest performance level of the network service with respect to all nodes. The problem is termed the reliable 1-center problem and finds applications ... Keywords: 1-Center, Location theory, Network reliability, Stochastic optimization

José Santiváñez; Emanuel Melachrinoudis; Mary E. Helander

2009-05-01T23:59:59.000Z

156

Reliability and Markets Program Information  

Energy.gov (U.S. Department of Energy (DOE))

Summary of the Tranmission Reliability program's Reliability and Markets activity area. The program helps to increase grid reliability and reduce costs for customers using integrated market and...

157

Reliability and maintainability program  

SciTech Connect

The program's goals are to accelerate the adoption of active solar energy systems in building applications by improving the reliability and maintainability of installed systems. The project is designed to accomplish this by providing the latest information; by assisting the industry in improving reliability and maintainability; by assisting in design, manufacture, installation and maintenance of reliable and durable systems; and by assisting in the development of codes and standards. Work and accomplishments in these areas are enumerated. (LEW)

Eden, A.

1981-05-01T23:59:59.000Z

158

Human Reliability Program (HRP)  

Energy.gov (U.S. Department of Energy (DOE))

Office of SecurityHRP Training Certification- HTML- Flash10 CFR 712, Human Reliability ProgramHRP HandbookTools for Clinicians- Medication List- Medical Records Checklist

159

Materials Reliability Employment Opportunities  

Science Conference Proceedings (OSTI)

... from an in-house microfabrication facility that has ... well as access to other world-class NIST facilities. ... of membrane reliability is essential for ensuring ...

2012-10-15T23:59:59.000Z

160

General Aviation Aircraft Reliability Study  

Science Conference Proceedings (OSTI)

This reliability study estimates Complex General Aviation (GA) Aircraft System reliability. As part of an effort to successfully improve the safety and reliability of the next generation of GA aircraft, a benchmarking of the current reliability of GA ...

Pettit Duane; Turnbull Andrew

2001-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

ME-OWA based DEMATEL reliability apportionment method  

Science Conference Proceedings (OSTI)

The maximal entropy ordered weighted averaging (ME-OWA)-based decision making trial and evaluation laboratory (DEMATEL) method for reliability allocation has been examined. The assessment results show that most conventional reliability allocation methods ... Keywords: Decision making trial and evaluation laboratory (DEMATEL), Feasibility-of-objectives technique, Maximal entropy ordered weighted averaging (ME-OWA), Reliability allocation

Cheng-Shih Liaw; Yung-Chia Chang; Kuei-Hu Chang; Thing-Yuan Chang

2011-08-01T23:59:59.000Z

162

Building reliability growth model using sequential experiments and the Bayesian theorem for small datasets  

Science Conference Proceedings (OSTI)

Early in the process of developing a new product, on hand data is usually scarce and it is hard to assess product reliability. Many previous studies thus assume prior product failure distribution in the area of reliability estimation. However, when real ... Keywords: Bayesian method, Reliability assessment, Reliability growth, Small data

Der-Chiang Li; Fengming M. Chang; Kuei-Ching Chen

2010-04-01T23:59:59.000Z

163

Coupling of Realistic Rate Estimates with Genomics for Assessing Contaminant Attenuation and Long-Term Plume Containment  

DOE Green Energy (OSTI)

Dissolved dense nonaqueous-phase liquid plumes are persistent, widespread problems in the DOE complex. At the Idaho National Engineering and Environmental Laboratory, dissolved trichloroethylene (TCE) is disappearing from the Snake River Plain aquifer (SRPA) by natural attenuation, a finding that saves significant site restoration costs. Acceptance of monitored natural attenuation as a preferred treatment technology requires direct evidence of the processes and rates of the degradation. Our proposal aims to provide that evidence for one such site by testing two hypotheses. First, we believe that realistic values for in situ rates of TCE cometabolism can be obtained by sustaining the putative microorganisms at the low catabolic activities consistent with aquifer conditions. Second, the patterns of functional gene expression evident in these communities under starvation conditions while carrying out TCE cometabolism can be used to diagnose the cometabolic activity in the aquifer itself. Using the cometabolism rate parameters derived in low-growth bioreactors, we will complete the models that predict the time until background levels of TCE are attained at this location and validate the long-term stewardship of this plume. Realistic terms for cometabolism of TCE will provide marked improvements in DOE's ability to predict and monitor natural attenuation of chlorinated organics at other sites, increase the acceptability of this solution, and provide significant economic and health benefits through this noninvasive remediation strategy. Finally, this project aims to derive valuable genomic information about the functional attributes of subsurface microbial communities upon which DOE must depend to resolve some of its most difficult contamination issues.

Colwell, F. S.; Crawford, R. L.; Sorenson, K.

2005-06-01T23:59:59.000Z

164

Photovoltaic system reliability  

SciTech Connect

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

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

1997-10-01T23:59:59.000Z

165

NREL: Gearbox Reliability Collaborative - Gearbox Reliability Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Projects Projects Gearbox deficiencies are the result of many factors. Through gearbox modeling and testing, condition monitoring, and the failure database, the collaborative is expanding the industry's knowledge base, recommending efficient and cost-effective improvements, and facilitating immediate improvements in the gearbox life cycle. Gearbox Modeling and Testing Illustration of representative gearbox including the hub, main bearing, main shaft, gearbox, brake, high speed shaft, generator, and bed plate. A complete gearbox redesign has been completed in a collaborative effort between NREL and industry partners. This process documented and analyzed the design process and produced a new gearbox design that integrates knowledge from previous Gearbox Reliability Collaborative (GRC) activities.

166

Hydropower Reliability Study  

Science Conference Proceedings (OSTI)

Though hydroelectric plants are highly reliable, even a 1% improvement in their availability could save the U.S. utility industry $125 million per year. This comprehensive review of hydropower data and practices recommends ways to achieve such improvement.

1984-03-01T23:59:59.000Z

167

Definition: Interconnection Reliability Operating Limit Tv | Open Energy  

Open Energy Info (EERE)

Limit Tv Limit Tv Jump to: navigation, search Dictionary.png Interconnection Reliability Operating Limit Tv The maximum time that an Interconnection Reliability Operating Limit can be violated before the risk to the interconnection or other Reliability Coordinator Area(s) becomes greater than acceptable. Each Interconnection Reliability Operating Limit's Tv shall be less than or equal to 30 minutes.[1] Related Terms Interconnection Reliability Operating Limitinterconnection, interconnection References ↑ Glossary of Terms Used in Reliability Standards An i LikeLike UnlikeLike You like this.Sign Up to see what your friends like. nline Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Interconnection_Reliability_Operating_Limit_Tv&oldid=493031

168

Reliability Assessment Incorporating Operational Considerations and Economic  

E-Print Network (OSTI)

. Gross, E. Litvinov and R. Coutu "Quantification of Market Performance as a Function of System Security

169

ASSESSMENT OF DESIGN AND RELIABILITY OF SOLID ...  

Science Conference Proceedings (OSTI)

... a significant adverse impact on human health, climate, and environmental ... Fire Zone 2 was in the vicinity of ... These zones are shown in Figure 2, an ...

2011-10-04T23:59:59.000Z

170

Assessing Reliability in Energy Supply Systems  

E-Print Network (OSTI)

imports, political and social conditions in energy-exporting nations, storage (such as the Strategic Petroleum Reserve in the U.S. ),

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

2008-01-01T23:59:59.000Z

171

Assessing reliability in energy supply systems  

E-Print Network (OSTI)

imports, political and social conditions in energy-exporting nations, storage (such as the Strategic Petroleum Reserve in the U.S. ),

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

2007-01-01T23:59:59.000Z

172

Assessing Reliability In Hydrogen Supply Pathways  

E-Print Network (OSTI)

but increasing portion of natural gas supply – As percentagehighly dependent on natural gas supply infrastructure LNGpercentage of natural gas supply Dependence of other systems

McCarthy, Ryan; Ogden, Joan M

2005-01-01T23:59:59.000Z

173

Assessing Reliability In Hydrogen Supply Pathways  

E-Print Network (OSTI)

history of damage stemming from accidental or intentional actions LNG makes up a small, but increasing portion of natural gas

McCarthy, Ryan; Ogden, Joan M

2005-01-01T23:59:59.000Z

174

Assessing Reliability In Hydrogen Supply Pathways  

E-Print Network (OSTI)

gas and petroleum exports Other suppliers pose greater threats (Potential) importsImport terminals – Global LNG tanker fleet – Domestic natural gasgas supply LNG dependence on other systems Essentially 100% imports

McCarthy, Ryan; Ogden, Joan M

2005-01-01T23:59:59.000Z

175

Post-Winter Reliability Assessment Summary............................................................ 1  

E-Print Network (OSTI)

NERC’s Mission....................................................................................................... ii

unknown authors

2011-01-01T23:59:59.000Z

176

Definition: Reliability Coordinator | Open Energy Information  

Open Energy Info (EERE)

Coordinator Coordinator Jump to: navigation, search Dictionary.png Reliability Coordinator The entity that is the highest level of authority who is responsible for the reliable operation of the Bulk Electric System, has the Wide Area view of the Bulk Electric System, and has the operating tools, processes and procedures, including the authority to prevent or mitigate emergency operating situations in both nextday analysis and real-time operations. The Reliability Coordinator has the purview that is broad enough to enable the calculation of Interconnection Reliability Operating Limits, which may be based on the operating parameters of transmission systems beyond any Transmission Operator's vision.[1] Related Terms transmission lines, Bulk Electric System, transmission line

177

Reliability based investigation of design factors  

SciTech Connect

Second-moment probabilistic techniques are used to formulate structural resistances and loads and to derive reliability-based safety, load, and strength factors for design. Existing concepts of the second-moment reliability theory have been extended to the practical case of multiple load combinations. This development consistently includes the stochastic character of loads and the unpredictable nature of their combinations. For this purpose, a new technique for the evaluation of load combinations is presented, whereby the moments of the extreme of combined loads is obtained in terms of the moments of individual loads and parameters describing their random fluctuations in time. Reliability-based safety, load, and strength factors are derived in terms of the acceptable level of risk, the coefficients of variation of the loads and resistance, uncertainties associated with errors in modeling and estimation, and a set of parameters describing the stochastic nature of loads and their combinations.

1978-06-30T23:59:59.000Z

178

Photovoltaic module reliability workshop  

DOE Green Energy (OSTI)

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.

Mrig, L. (ed.)

1990-01-01T23:59:59.000Z

179

Gearbox Reliability Collaborative Update (Presentation)  

SciTech Connect

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.

Sheng, S.

2013-10-01T23:59:59.000Z

180

Reconsideration of Software Reliability Measurements  

Science Conference Proceedings (OSTI)

In this paper, we discuss the major weaknesses of the software reliability measurements currently used and propose a new model of software reliability estimation. For the time being, the software reliability models are employed far from ubiquitous. As ...

Shiyi Xu

2007-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Guidelines for New High Reliability Fossil Plants  

Science Conference Proceedings (OSTI)

Many new power plants are being constructed throughout the world, and many organizations are beginning to design and commission new fossil plants. These circumstances provide an excellent opportunity to build long-term reliability into the specifications and designs for the new plants.

2009-01-28T23:59:59.000Z

182

Reliable water supply system design under uncertainty  

Science Conference Proceedings (OSTI)

Given the natural variability and uncertainties in long-term predictions, reliability is a critical design factor for water supply systems. However, the large scale of the problem and the correlated nature of the involved uncertainties result in models ... Keywords: Data uncertainty, Robust optimization, Spatially correlated data, Water supply system

G. Chung; K. Lansey; G. Bayraksan

2009-04-01T23:59:59.000Z

183

Reliability and Risk Significance: For Maintenance and Reliability Professionals at Nuclear Power Plants (Japanese Version)  

Science Conference Proceedings (OSTI)

This Japanese version of Report 1007079 explains the connections between the reliability and availability of commercial nuclear power plant components and their risk significance as measured by a probabilistic safety assessment (PSA). The scope covers the two most common measures of risk significance and how they can be used to inform plant decision makers about risk. It also provides guidance on achieving balance between reliability and availability when performing preventive maintenance (PM) and on est...

2012-06-19T23:59:59.000Z

184

NREL: Photovoltaics Research - Performance and Reliability R&D  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Research Search More Search Options Site Map Photo of Photovoltaic Solar Panels. The focus of Photovoltaic (PV) Reliability Research and Development (R&D) at NREL is to improve PV technologies. Modules and systems are tested for long-term performance and stressed in the field and with accelerated testing equipment, all to find R&D solutions to improve PV reliability. Learn about working with us. Help us improve PV systems by providing data in our PV Module Field Failure Database. PV Reliability R&D focuses on three primary areas: Real-time reliability R&D Long-term performance, reliability, and failures of PV components and systems are studied at NREL and through collaborations elsewhere. Analysis is performed to quantify long-term degradation, and

185

Culture Representation in Human Reliability Analysis  

Science Conference Proceedings (OSTI)

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

David Gertman; Julie Marble; Steven Novack

2006-12-01T23:59:59.000Z

186

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

North American Electric Reliability Corporation (NERC): Ensuring a Reliable Bulk Electric System North American Electric Reliability Corporation (NERC): Ensuring a Reliable Bulk...

187

Power electronics reliability.  

Science Conference Proceedings (OSTI)

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

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

2010-10-01T23:59:59.000Z

188

A summary of North American HVDC converter station reliability specifications  

SciTech Connect

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

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

1993-07-01T23:59:59.000Z

189

2010 Transmission Reliability Program Peer Review | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission Reliability Program Peer Review Transmission Reliability Program Peer Review 2010 Transmission Reliability Program Peer Review The Transmission Reliability research area focuses on two key areas: 1) Real-Time Grid Reliability Management and 2) Reliability and Markets. The first area develops monitoring and analysis tools that process synchrophasor data to enable real-time assessment of grid status and stability margins, with the goal of improving power system reliability and visibility through wide-area measurement and control. It is developing advanced technologies and tools to help create a resilient electric transmission system that can better detect disturbances, accommodate a variety of generation sources, and automatically reconfigure the grid to prevent widespread outages and/or rebalance the system. The second area

190

Mobile Generation Options to Enhance Customer Service Reliability: Case Study for the New York Power Authority  

Science Conference Proceedings (OSTI)

A community served by New York Power Authority (NYPA) has a history of long-term power reliability problems. To resolve these reliability problems, NYPA has evaluated several mobile distributed generation (DIS-GEN) options.

1997-12-23T23:59:59.000Z

191

Implications of Wide-Area Geographic Diversity for Short- Term Variability of Solar Power  

E-Print Network (OSTI)

same level of reliability with and without PV. • Section 3the contribution of PV to long-term planning reliability or

Mills, Andrew

2010-01-01T23:59:59.000Z

192

Substation Reliability Centered Maintenance  

SciTech Connect

Substation Reliability Centered Maintenance (RCM) is a technique that is used to develop maintenance plans and criteria so the operational capability of substation equipment is achieved, restored, or maintained. The objective of the RCM process is to focus attention on system equipment in a manner that leads to the formulation of an optimal maintenance plan. The RCM concept originated in the airline industry in the 1970s and has been used since 1985 to establish maintenance requirements for nuclear power plants. The RCM process is initially applied during the design and development phase of equipment or systems on the premise that reliability is a design characteristic. It is then reapplied, as necessary, during the operational phase to sustain a more optimal maintenance program based on actual field experiences. The purpose of the RCM process is to develop a maintenance program that provides desired or specified levels of operational safety and reliability at the lowest possible overall cost. The objectives are to predict or detect and correct incipient failures before they occur or before they develop into major defects, reduce the probability of failure, detect hidden problems, and improve the cost-effectiveness of the maintenance program. RCM accomplishes two basic purposes: (1) It identifies in real-time incipient equipment problems, averting potentially expensive catastrophic failures by communicating potential problems to appropriate system operators and maintenance personnel. (2) It provides decision support by recommending, identifying, and scheduling preventive maintenance. Recommendations are based on maintenance criteria, maintenance history, experience with similar equipment, real-time field data, and resource constraints. Hardware and software are used to accomplish these two purposes. The RCM system includes instrumentation that monitors critical substation equipment as well as computer software that helps analyze equipment data.

Purucker, S.L.

1992-11-01T23:59:59.000Z

193

Component reliability testing  

SciTech Connect

Component and system reliability of active solare energy systems continues to be a major concern of designers, manufacturers, installers, and consumers. Six test loops were constructed at the Solar Energy Research Institute in Golden, Colorado, to thermally cycle active solar energy system components. Drain valves, check valves, air vents, vacuum breakers, tempering valves, and polybutylene pipe were included in the testing. Test results show poor reliabiity of some of the components and limited performance from others. The results lead to a better understanding of certain failures in the field and present designers with realistic expectations for these components.

Farrington, R.B.

1984-03-01T23:59:59.000Z

194

Assessment  

NLE Websites -- All DOE Office Websites (Extended Search)

Genetic Genetic Variability of Cell Wall Degradability for the Selection of Alfalfa with Improved Saccharification Efficiency Marc-Olivier Duceppe & Annick Bertrand & Sivakumar Pattathil & Jeffrey Miller & Yves Castonguay & Michael G. Hahn & Réal Michaud & Marie-Pier Dubé # Her Majesty the Queen in Right of Canada 2012 Abstract Alfalfa (Medicago sativa L.) has a high potential for sustainable bioethanol production, particularly because of its low reliance on N fertilizer. We assessed near-infrared reflec- tance spectroscopy (NIRS) as a high-throughput technique to measure cell wall (CW) degradability in a large number of lignified alfalfa stem samples. We also used a powerful immu- nological approach, glycome profiling, and chemical analyses to increase our knowledge of the composition of CW poly- saccharides of alfalfa stems with various levels

195

Operator Reliability Experiments Using Power Plant Simulators, Volumes 1-3: Volumes 1-3  

Science Conference Proceedings (OSTI)

Operator reliability experiment (ORE) data, collected on actual operating crews from three PWR and three BWR simulators, enhances understanding of their performance during emergency events. These data form the basis for quantifying human reliability in probabilistic risk assessment (PRA).

1980-08-01T23:59:59.000Z

196

Software reliability and dependability: a roadmap  

E-Print Network (OSTI)

Shifting the focus from software reliability to user-centred measures of dependability in complete software-based systems. Influencing design practice to facilitate dependability assessment. Propagating awareness of dependability issues and the use of existing, useful methods. Injecting some rigour in the use of process-related evidence for dependability assessment. Better understanding issues of diversity and variation as drivers of dependability. Bev Littlewood is founder-Director of the Centre for Software Reliability, and Professor of Software Engineering at City University, London. Prof Littlewood has worked for many years on problems associated with the modelling and evaluation of the dependability of software-based systems; he has published many papers in international journals and conference proceedings and has edited several books. Much of this work has been carried out in collaborative projects, including the successful EC-funded projects SHIP, PDCS, PDCS2, DeVa. He has been employed as a consultant to

Bev Littlewood; Lorenzo Strigini

2000-01-01T23:59:59.000Z

197

Consider insulation reliability  

SciTech Connect

This paper reports that when calcium silicate and two brands of mineral wool were compared in a series of laboratory tests, calcium silicate was more reliable. And in-service experience with mineral wool at a Canadian heavy crude refinery provided examples of many of the lab's findings. Lab tests, conducted under controlled conditions following industry accepted practices, showed calcium silicate insulation was stronger, tougher and more durable than the mineral wools to which it was compared. For instance, the calcium silicate insulation exhibited only some minor surface cracking when heated to 1,200[degrees]F (649[degrees]C), while the mineral wools suffered binder burnout resulting in sagging, delamination and a general loss of dimensional stability.

Gamboa (Manville Mechanical Insulations, a Div. of Schuller International Inc., Denver, CO (United States))

1993-01-01T23:59:59.000Z

198

Transmission Reliability | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Transmission Reliability Transmission Reliability Transmission Reliability Modernizing America's electricity infrastructure is one of the U.S. Department of Energy's top priorities. The DOE Strategic Plan states that today's electric grid needs to be more efficient, reliable, and secure. A modern, smarter electric grid may save consumers money, help our economy run more efficiently, allow rapid growth in renewable energy sources, and enhance energy reliability. The Department's research into a variety of tools that will improve advanced system monitoring, visualization, control, operations, and market structure will ultimately modernize the electricity transmission infrastructure to ease congestion, allow for increases in demand, and provide a greater degree of security. The Transmission Reliability Program is aligned with this strategic plan

199

Lithium battery safety and reliability  

DOE Green Energy (OSTI)

Lithium batteries have been used in a variety of applications for a number of years. As their use continues to grow, particularly in the consumer market, a greater emphasis needs to be placed on safety and reliability. There is a useful technique which can help to design cells and batteries having a greater degree of safety and higher reliability. This technique, known as fault tree analysis, can also be useful in determining the cause of unsafe behavior and poor reliability in existing designs.

Levy, S.C.

1991-01-01T23:59:59.000Z

200

Reliability Results of NERSC Systems  

E-Print Network (OSTI)

of various systems at NERSC. They graciously provided meReliability Results of NERSC Systems Akbar Mokhtarani,William Kramer, Jason Hick NERSC - LBNL Abstract In order to

Mokhtarani, Akbar; Petascale Data Storage Institute (PDSI)

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Distribution Reliability Trends and Correlations  

Science Conference Proceedings (OSTI)

Distribution reliability statistics, which measure sustained interruptions, are the primary benchmark used by utilities and regulators to identify service quality and to measure performance.

2005-11-29T23:59:59.000Z

202

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

Energy.gov (U.S. Department of Energy (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).

203

Regulatory Commission (Commission) directs the North American Electric Reliability  

E-Print Network (OSTI)

submit to the Commission for approval proposed Reliability Standards that address the impact of geomagnetic disturbances (GMD) on the reliable operation of the Bulk-Power System. The Commission directs NERC to implement the directive in two stages. In the first stage, NERC must submit, within six months of the effective date of this Final Rule, one or more Reliability Standards that require owners and operators of the Bulk-Power System to develop and implement operational procedures to mitigate the effects of GMDs consistent with the reliable operation of the Bulk-Power System. In the second stage, NERC must submit, within 18 months of the effective date of this Final Rule, one or more Reliability Standards that require owners and operators of the Bulk-Power System to conduct initial and on-going assessments of the potential impact of benchmark GMDDocket No. RM12-22-000- 2-events on Bulk-Power System equipment and the Bulk-Power System as a whole. The Second Stage GMD Reliability Standards must identify benchmark GMD events that specify what severity GMD events a responsible entity must assess for potential impacts on the Bulk-Power System. If the assessments identify potential impacts from benchmark GMD events, the Reliability Standards should require owners and operators

Cfr Part

2013-01-01T23:59:59.000Z

204

Substation Configuration Reliability 1 Reliability of Substation Configurations  

E-Print Network (OSTI)

-Repairable Components," Power Learn Electric Power Engineering Education, Module PE.PAS.U15.5, 2005. #12;SubstationSubstation Configuration Reliability 1 Reliability of Substation Configurations Daniel Nack, Iowa substation, it still contains what could be described as weak points or points of failure that would lead

McCalley, James D.

205

Nuclear Asset Management Database: Phase 2: Prototype Long-term Asset Management Database (LAMDA)  

Science Conference Proceedings (OSTI)

EPRI members engaged in nuclear asset management (NAM) and life cycle management (LCM) view quality equipment reliability and cost data as one of the highest priority needs in a market-driven industry, but less data are available for equipment important to generation than for safety equipment addressed in probabilistic risk assessment (PRA). This interim report describes the second phase of development of the Long-term Asset Management Database (LAMDA).

2004-12-21T23:59:59.000Z

206

Texas Uses Phasors to Increase Electricity Reliability | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Uses Phasors to Increase Electricity Reliability Uses Phasors to Increase Electricity Reliability Texas Uses Phasors to Increase Electricity Reliability March 31, 2011 - 12:57pm Addthis Merrill Smith Program Manager, Office of Electricity Delivery & Energy Reliability What does this mean for me? Phasor measurement units are part of a comprehensive approach to managing the variability from renewable sources, particularly wind. This project will enable more effective use of renewable energy sources by helping to illustrate solutions for managing unpredictability and promote reliability on the grid. As any businessperson will tell you, a key to long-term success is the ability to foresee potential problems and limit risk. In the electricity industry this ability can prevent grid events, like unexpected

207

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

SciTech Connect

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.

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

2013-09-01T23:59:59.000Z

208

Distribution Reliability Indices Tracking Within the United States  

Science Conference Proceedings (OSTI)

Distribution reliability statistics, based on sustained interruptions, are the primary benchmark used by utilities and regulators to identify service quality and to measure performance. More than 20 states now require some level of annual reporting on the quality of service in terms of frequency and duration of sustained interruptions. Included in such reporting is documentation of specific distribution reliability indices such as the System Average Interruption Frequency Index (SAIFI) and System Average...

2003-05-12T23:59:59.000Z

209

Delivering High Reliability in Heat Recovery Steam Generators  

Science Conference Proceedings (OSTI)

Despite being relatively new, the worldwide fleet of combined-cycle units with heat recovery steam generators (HRSGs) has exhibited a disappointing record with respect to reliability and availability in terms of HRSG tube failures (HTFs). This report identifies actions that—if implemented prior to commercial operation—should greatly improve the operational HRSG reliability.BackgroundWhen contemplating new combined-cycle units, the choices that can ...

2012-12-12T23:59:59.000Z

210

Weather Normalization of Reliability Indices  

Science Conference Proceedings (OSTI)

Weather significantly increases variability of reliability indices. This project focuses on exploring statistical correlations between weather parameters and system performance indices using historical utility reliability data and weather data. Using this information, various approaches for normalizing utility performance indices for variability in weather can be developed.

2008-12-22T23:59:59.000Z

211

2004 Equipment Reliability Forum Proceedings  

Science Conference Proceedings (OSTI)

This report describes the proceedings of the EPRI 2004 Equipment Reliability Forum that was held September 13–14, 2004, in Kansas City, Missouri. This annual forum provides an opportunity for industry personnel involved in equipment reliability and related issues to exchange information and share experiences. It is structured to incorporate both formal presentations and open discussion.

2004-11-30T23:59:59.000Z

212

Reliability-based design optimization using efficient global reliability analysis.  

Science Conference Proceedings (OSTI)

Finding the optimal (lightest, least expensive, etc.) design for an engineered component that meets or exceeds a specified level of reliability is a problem of obvious interest across a wide spectrum of engineering fields. Various methods for this reliability-based design optimization problem have been proposed. Unfortunately, this problem is rarely solved in practice because, regardless of the method used, solving the problem is too expensive or the final solution is too inaccurate to ensure that the reliability constraint is actually satisfied. This is especially true for engineering applications involving expensive, implicit, and possibly nonlinear performance functions (such as large finite element models). The Efficient Global Reliability Analysis method was recently introduced to improve both the accuracy and efficiency of reliability analysis for this type of performance function. This paper explores how this new reliability analysis method can be used in a design optimization context to create a method of sufficient accuracy and efficiency to enable the use of reliability-based design optimization as a practical design tool.

Bichon, Barron J. (Southwest Research Institute, San Antonio, TX); Mahadevan, Sankaran (Vanderbilt University, Nashville, TN); Eldred, Michael Scott

2010-05-01T23:59:59.000Z

213

North American Electric Reliability Corporation  

E-Print Network (OSTI)

Compliance filing regarding consistency of Western Electricity Coordinating Council (WECC) regional reliability Standard WECC-TOP-STD-007-0 with NERC reliability standard Dear Ms. Michael: On July 9, 2007, the North American Electric Reliability Corporation (NERC) filed an explanation regarding the consistency of WECC’s regional reliability standard WECC-TOP-STD-007-0 with respect to NERC Reliability Standard IRO-005-1. Notice of this filing was issued on July 12, 2007 with comments, protests or motions to intervene due on or before August 8, 2007. Notices of intervention and unopposed timely filed motions to intervene are granted pursuant to the operation of Rule 214 of the Commission’s Rules of Practice and Procedure (18 C.F.R. § 385.214). Any opposed or untimely filed motion to intervene is governed by the provisions of Rule 214. No protests or adverse comments were filed.

Docket No. Rr

2007-01-01T23:59:59.000Z

214

Photovoltaic performance and reliability workshop  

DOE Green Energy (OSTI)

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

Mrig, L. [ed.

1993-12-01T23:59:59.000Z

215

Fatigue case study and reliability analyses for wind turbines  

DOE Green Energy (OSTI)

Modern wind turbines are fatigue critical machines used to produce electrical power. To insure long term, reliable operation, their structure must be optimized if they are to be economically viable. The fatigue and reliability projects in Sandia`s Wind Energy Program are developing the analysis tools required to accomplish these design requirements. The first section of the paper formulates the fatigue analysis of a wind turbine using a cumulative damage technique. The second section uses reliability analysis for quantifying the uncertainties and the inherent randomness associated with turbine performance and the prediction of service lifetimes. Both research areas are highlighted with typical results.

Sutherland, H.J.; Veers, P.S.

1994-12-31T23:59:59.000Z

216

Long-term Planning and Investment for Transmission and Generation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and generating capacity. Long-term Planning and Investment for Transmission and Generation More Documents & Publications 2012 Reliability & Markets Peer Review -...

217

2013 Reliability & Markets Peer Review - Day 1 Presentations | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2013 Reliability & Markets Peer Review - Day 1 Presentations 2013 Reliability & Markets Peer Review - Day 1 Presentations 2013 Reliability & Markets Peer Review - Day 1 Presentations The Transmission Reliability R&D Reliability & Markets Peer Review included 6 sessions over 2 days on August 6 - 7, 2013. Presentations from Day 1 (Sessions I through IV) are available below. Session I: Ben Hobbs (Johns Hopkins), Kameshwar Poolla (UC Berkeley) Session II: Ray Zimmerman (Cornell), Hsiao-Dong Chiang (Cornell) Session III: Shmuel Oren (UC Berkeley), Dan Tylavsky (U Arizona), Tom Overbye (U Illinois) Session IV: Lindsay Anderson (Cornell), HyungSeon Oh (Cornell) 2013 R&M Peer Review - Assessing Transmission Investments Under Uncertainty - Ben Hobbs, Johns Hopkins 2013 R&M Peer Review - Coordinated Aggregation of Distributed Energy

218

2012 Reliability & Markets Peer Review - Full Presentations | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reliability & Markets Peer Review - Full Presentations Reliability & Markets Peer Review - Full Presentations 2012 Reliability & Markets Peer Review - Full Presentations The Transmission Reliability R&D Reliability & Markets Peer Review included 11 presentations over 2 days on August 7 - 8, 2012 at Cornell University in Ithaca, NY. The full presentations are available below. Presentation summaries are also available. 2012 R&M Peer Review - Transmission Investment Assessment Under Uncertainty - Ben Hobbs 2012 R&M Peer Review - Renewable Integration Through Risk-Limiting Dispatch - Pravin Varaiya 2012 R&M Peer Review - Development and Testing of New Tools - Ray Zimmerman 2012 R&M Peer Review - Commercialization of the SuperOPF Framework - Hsiao-Dong Chiang 2012 R&M Peer Review - Essence of Structure Preserving Network Reductions -

219

2012 Reliability & Markets Peer Review | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reliability & Markets Peer Review 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 August 7 - 8, 2012 at Cornell University in Ithaca, NY. Presentations and summaries are available through the links and the agenda is included below. Summaries | Full Presentations Day 1: August 7 Transmission Investment Assessment Under Uncertainty About Fuel Prices, Technology, Renewables Penetration and Market Responses Using a Multi-State Stochastic Model Approach with Recourse Renewable Integration Through Risk-Limiting Dispatch and Distributed Resource Aggregations Development and Testing of New Tools Commercialization of the SuperOPF Framework: Phase 2 Essence of Structure Preserving (ESP) Network Reductions for

220

NREL: Gearbox Reliability Collaborative - About the Gearbox Reliability  

NLE Websites -- All DOE Office Websites (Extended Search)

About the Gearbox Reliability Collaborative About the Gearbox Reliability Collaborative Premature gearbox failures have a significant impact on the cost of wind farm operations. In 2007, NREL initiated the Gearbox Reliability Collaborative (GRC). The project combines field testing, dynamometer testing, analysis, modeling, condition monitoring, development of a failure database, and operations and maintenance research in a multi-pronged approach to determine why wind turbine gearboxes do not always achieve their expected design life-the time period that manufacturers expect them to last. The collaborative of manufacturers, owners, operators, researchers, and consultants focuses on gearbox modeling and testing and the development of a gearbox failure database. Collaborative members also investigate gearbox

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

2013 Transmission Reliability Program Peer Review | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission Reliability Program Peer Review Transmission Reliability Program Peer Review 2013 Transmission Reliability Program Peer Review The Transmission Reliability Program Peer Review included six sessions over 2 days on June 27 - 28, 2013. Presentations are available through the individual session links. The agenda and introduction by Joe Eto, LBNL, are available below. Day 1: June 27 Session I Baselining Studies and Analysis, Bharat Bhargava, EPG Baselining Studies and Analysis, Brett Amidan, PNNL Synchrophasor Standards Support and Development, Ken Martin, EPG Session II Advanced Synchrophasor Metrology, Stan Hadley, ORNL GPS Issue Management, Mark Buckner, ORNL Technology Assessment for Next Generation PMU, Mark Buckner, ORNL Session III Measurement-Based Stability Assessment, Dan Trudnowski, U. Montana

222

Strategic Insights on Security, Quality, Reliability, and Availability  

Science Conference Proceedings (OSTI)

This report provides security criteria and performance metrics for assessing the electric power system. It is part of a larger project on the strategy for managing security, quality, reliability, and availability (SQRA) performance of electric power systems. The main focus of this update is measurement of the security component. It also addresses emerging North American Electric Reliability Council (NERC) operating and planning standards and their roles in managing SQRA performance. This report is intend...

2005-03-31T23:59:59.000Z

223

Transmission Reliability Evaluation of Large Scale System (TRELSS) Software, Version 6.0  

Science Conference Proceedings (OSTI)

TRELSS, Version 6.0 has been upgraded recently. The TRELSS code simulates power transmission systems and allows the reliability of the modeled system to be accurately estimated. TRELSS computes reliability indices using a contingency enumeration approach, which involves selection and evaluation of contingencies, classification of each contingency according to specified failure criteria, and accumulation of reliability indices. Two methods of reliability assessment are used: the System Problem Approach (w...

2003-03-18T23:59:59.000Z

224

Final report on reliability and lifetime prediction.  

Science Conference Proceedings (OSTI)

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.

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

2012-12-01T23:59:59.000Z

225

Inherently Reliable Boiler Component Design  

Science Conference Proceedings (OSTI)

This report summarizes the lessons learned during the last decade in efforts to improve the reliability and availability of boilers used in the production of electricity. The information in this report can assist in component modifications and new boiler designs.

2003-03-31T23:59:59.000Z

226

EPRI Distribution Reliability Practices Repository  

Science Conference Proceedings (OSTI)

 A key objective of the Electric Power Research Institute’s (EPRI’s) research into distribution reliability practices is to identify, document, and provide practice summary descriptions to research participants in a format that facilitates comparison and aids decision makers in identifying the practices in place at other utilities that can be applied to a decision maker’s utility to improve performance.This report presents distribution reliability practice results ...

2012-10-19T23:59:59.000Z

227

Photovoltaics performance and reliability workshop  

DOE Green Energy (OSTI)

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

Mrig, L. [ed.] [ed.

1992-11-01T23:59:59.000Z

228

Photovoltaics performance and reliability workshop  

DOE Green Energy (OSTI)

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

Mrig, L. (ed.) [ed.

1992-01-01T23:59:59.000Z

229

An Examination of Temporal Trends in Electricity Reliability Based on Reports from U.S. Electric Utilities  

E-Print Network (OSTI)

Reliability of the U.S. Electric Power System: An Assessment2003 IEEE Guide for Electric Power Distribution ReliabilitySmart Self-Healing Electric Power Grid." Power and Energy

Eto, Joseph H.

2013-01-01T23:59:59.000Z

230

Petition of the North American Electric Reliability Corporation for  

E-Print Network (OSTI)

(NERC) submitted a filing seeking FERC approval of an interpretation of Reliability Standards CIP-001-1 — Cyber Security — Sabotage Reporting, Requirement R2. 2. This filing is in accordance with 18 C.F.R. § 39.5 and Section 215(d)(1) of the Federal Power Act, which allows the Electric Reliability Organization to file a modification to a reliability standard with FERC for approval. No modification to the language contained in this specific requirement is being proposed through the interpretation. The filing consists of the developed interpretation, the Reliability Standards CIP-001-1 which includes the appended interpretation, a complete development record of the interpretation, and a roster of the interpretation development team. 3. This interpretation was approved by the NERC Board of Trustees February 16, 2010. The interpretation requested clarification of the “appropriate parties ” to whom RCs, BAs, TOs, GOs and LSEs must communicate information concerning sabotage events. The interpretation states that the term refers collectively to

Rebecca J. Michael

2011-01-01T23:59:59.000Z

231

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

DOE Green Energy (OSTI)

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

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

2013-05-01T23:59:59.000Z

232

Longitudinal study to assess the safety and efficacy of a live-attenuated SHIV vaccine in long term immunized rhesus macaques  

SciTech Connect

Live-attenuated viruses derived from SIV and SHIV have provided the most consistent protection against challenge with pathogenic viruses, but concerns regarding their long-term safety and efficacy have hampered their clinical usefulness. We report a longitudinal study in which we evaluated the long-term safety and efficacy of {delta}vpuSHIV{sub PPC}, a live virus vaccine derived from SHIV{sub PPC}. Macaques were administered two inoculations of {delta}vpuSHIV{sub PPC}, three years apart, and followed for eight years. None of the five vaccinated macaques developed an AIDS-like disease from the vaccine. At eight years, macaques were challenged with pathogenic SIV and SHIV. None of the four macaques with detectable cellular-mediated immunity prior to challenge had detectable viral RNA in the plasma. This study demonstrates that multiple inoculations of a live vaccine virus can be used safely and can significantly extend the efficacy of the vaccine, as compared to a single inoculation, which is efficacious for approximately three years.

Yankee, Thomas M. [Department of Microbiology, Molecular Genetics, and Immunology, University of Kansas Medical Center, 3025 WHW - MS 3029, 3901 Rainbow Boulevard, Kansas City, KS 66160 (United States)], E-mail: tyankee@kumc.edu; Sheffer, Darlene; Liu Zhengian; Dhillon, Sukhbir; Jia Fenglan; Chebloune, Yahia [Department of Microbiology, Molecular Genetics, and Immunology, University of Kansas Medical Center, 3025 WHW - MS 3029, 3901 Rainbow Boulevard, Kansas City, KS 66160 (United States); Stephens, Edward B. [Department of Microbiology, Molecular Genetics, and Immunology, University of Kansas Medical Center, 3025 WHW - MS 3029, 3901 Rainbow Boulevard, Kansas City, KS 66160 (United States); Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS 66160 (United States); Narayan, Opendra [Department of Microbiology, Molecular Genetics, and Immunology, University of Kansas Medical Center, 3025 WHW - MS 3029, 3901 Rainbow Boulevard, Kansas City, KS 66160 (United States)

2009-01-05T23:59:59.000Z

233

Electronic reliability estimation: how reliable are the results?  

Science Conference Proceedings (OSTI)

The development of Safety Critical Systems requires the compliance to several safety standards and regulations. Since, most of the times, human life is at stake, it is crucial to fully understand the behaviour of the system being developed in order to ... Keywords: MIL-Hdbk-217F, MTTF, estimation, reliability

Nuno Silva; Rui Lopes

2012-09-01T23:59:59.000Z

234

Electricity & Energy Reliability (WFP) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electricity & Energy Reliability (WFP) Electricity & Energy Reliability (WFP) The purpose of the workforce Plan is to provide focus and direction to Human Resources (HR) strategy....

235

Recommendations to Address Power Reliability Concerns Raised...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

236

Demand Response as a System Reliability Resource  

NLE Websites -- All DOE Office Websites (Extended Search)

Demand Response as a System Reliability Resource Title Demand Response as a System Reliability Resource Publication Type Report Year of Publication 2012 Authors Eto, Joseph H.,...

237

Comments of North American Electric Reliability Corporation ...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

American Electric Reliability Corporation (NERC) to DOE Smart Grid RFI: Addressing Policy and Logistical Challenges Comments of North American Electric Reliability Corporation...

238

Information Concerning Reliability Impacts under Various System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Information Concerning Reliability Impacts under Various System Configurations of the Mirant Potomac River Plant Information Concerning Reliability Impacts under Various System...

239

Maximal Reliability for Unit-weighted Composites  

E-Print Network (OSTI)

Maximal Reliability for Unit-weighted Composites Peter M.Maximal Reliability for Unit-weighted Composites Althoughconsistency coefficient for a unit-weighted composite. The

Peter M. Bentler

2011-01-01T23:59:59.000Z

240

Reliability Technology earns prestigious Los Alamos award  

NLE Websites -- All DOE Office Websites (Extended Search)

Reliability Technology earns award Reliability Technology earns prestigious Los Alamos award LANL has honored Michael Hamada, Harry Martz and a team of researchers with its first...

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

DAKOTA reliability methods applied to RAVEN/RELAP-7.  

SciTech Connect

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).

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

2013-09-01T23:59:59.000Z

242

Electricity Delivery and Energy Reliability  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

The Office of Electricity Delivery and Energy Reliability (OE) drives electric grid modernization and resiliency in the energy infrastructure while working to enable innovation across the energy sector, empowering American consumers, and securing our energy future. The OE mission and the leadership role OE plays in the energy industry directly support the President's effort to accelerate the transformation of America's energy system

243

Exceptional situations and program reliability  

Science Conference Proceedings (OSTI)

It is difficult to write programs that behave correctly in the presence of run-time errors. Proper behavior in the face of exceptional situations is important to the reliability of long-running programs. Existing programming language features often provide ... Keywords: Error handling, compensating transactions, linear sagas, linear types, resource management

Westley Weimer; George C. Necula

2008-03-01T23:59:59.000Z

244

Wind turbine reliability database update.  

SciTech Connect

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.

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

2009-03-01T23:59:59.000Z

245

Photovoltaic performance and reliability workshop  

DOE Green Energy (OSTI)

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.

Kroposki, B.

1996-10-01T23:59:59.000Z

246

Electric Reliability & Hurricane Preparedness Plan  

E-Print Network (OSTI)

plant that will improve reliability and stabilize fuel costs · Help meet future load growth and reserve;Mississippi Power Company · Headquartered - Gulfport · Subsidiary of Southern Company · Serves 23 counties Southeast Mississippi · 192,000 retail customers · Generating capacity: 3,166,192 kW · Plant Radcliffe

247

Assessment of effectiveness of geologic isolation systems. Perspectives on the geological and hydrological aspects of long-term release scenario analyses  

SciTech Connect

Information that may be relevant to individuals involved with analyzing long-term release scenarios of specific repositories for nuclear waste is presented. The bulk of the information is derived from recent studies in West Germany and the United States. Emphasis is on the specific geological and hydrological phenomena that, alone or in concert, could potentially perturb the area around specific repository sites. Research is continuing on most of the topics discussed within this report. Because research is ongoing, statements and conclusions described in this document are subject to change. The main topics of this report are: (1) fracturing, (2) geohydrology, (3) magmatic activity, and (4) geomorphology. Therefore, the site-specific nature of the problem cannot be overemphasized. As an example of how one might combine the many synergistic and time-dependent parameters into a concise format the reader is referred to A Conceputal Simulation Model for Release Scenario Analysis of a Hypothetical Site in Columbia Plateau Basalts, PNL-2892. For additional details on the topics in this report, the reader is referred to the Pacific Northwest Laboratory (PNL) consultant report listed in the bibliography.

Stottlemyre, J.A.; Wallace, R.W.; Benson, G.L.; Zellmer, J.T.

1980-06-01T23:59:59.000Z

248

Review of Quantitative Software Reliability Methods  

Science Conference Proceedings (OSTI)

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.

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

2010-09-17T23:59:59.000Z

249

Defining Requirements for Improved Photovoltaic System Reliability  

DOE Green Energy (OSTI)

Reliable systems are an essential ingredient of any technology progressing toward commercial maturity and large-scale deployment. This paper defines reliability as meeting system fictional requirements, and then develops a framework to understand and quantify photovoltaic system reliability based on initial and ongoing costs and system value. The core elements necessary to achieve reliable PV systems are reviewed. These include appropriate system design, satisfactory component reliability, and proper installation and servicing. Reliability status, key issues, and present needs in system reliability are summarized for four application sectors.

Maish, A.B.

1998-12-21T23:59:59.000Z

250

Real Time Grid Reliability Management 2005  

Science Conference Proceedings (OSTI)

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.

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

2008-07-07T23:59:59.000Z

251

Gearbox Reliability Collaborative Bearing Calibration  

DOE Green Energy (OSTI)

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

van Dam, J.

2011-10-01T23:59:59.000Z

252

Emerging Grid Reliability Improvement Technologies  

Science Conference Proceedings (OSTI)

The initial phase of a planned comprehensive Eastern Interconnection (EI) segmentation study is complete. As part of the preparations for completion of the EI study, and to carry out a similar effort for the Western Interconnection (WI), it was necessary to first investigate the potential of other technologies to compete with segmentation. This report discusses emerging grid reliability improvement technologies, providing a perspective on the pros and cons of segmentation, the grid shock absorber concept...

2007-10-29T23:59:59.000Z

253

Assessment of Phase Conductors  

Science Conference Proceedings (OSTI)

As transmission systems age, utilities are increasingly concerned about the reliability of aging conductors, especially ACSR conductors. Traditional methods for assessing conductors involve identifying the circuits that pose the greatest reliability risk and subjecting samples from suspect lines to tensile testing, but a range of corrosion detection methods have become available that increase the options available to utilities. This report describes several methods available for conductor assessment.

2009-12-23T23:59:59.000Z

254

ADVANCED NUCLEAR FUEL CYCLE EFFECTS ON THE TREATMENT OF UNCERTAINTY IN THE LONG-TERM ASSESSMENT OF GEOLOGIC DISPOSAL SYSTEMS - EBS INPUT  

Science Conference Proceedings (OSTI)

The Used Fuel Disposition (UFD) Campaign within the Department of Energy's Office of Nuclear Energy (DOE-NE) Fuel Cycle Technology (FCT) program has been tasked with investigating the disposal of the nation's spent nuclear fuel (SNF) and high-level nuclear waste (HLW) for a range of potential waste forms and geologic environments. The planning, construction, and operation of a nuclear disposal facility is a long-term process that involves engineered barriers that are tailored to both the geologic environment and the waste forms being emplaced. The UFD Campaign is considering a range of fuel cycles that in turn produce a range of waste forms. The UFD Campaign is also considering a range of geologic media. These ranges could be thought of as adding uncertainty to what the disposal facility design will ultimately be; however, it may be preferable to thinking about the ranges as adding flexibility to design of a disposal facility. For example, as the overall DOE-NE program and industrial actions result in the fuel cycles that will produce waste to be disposed, and the characteristics of those wastes become clear, the disposal program retains flexibility in both the choice of geologic environment and the specific repository design. Of course, other factors also play a major role, including local and State-level acceptance of the specific site that provides the geologic environment. In contrast, the Yucca Mountain Project (YMP) repository license application (LA) is based on waste forms from an open fuel cycle (PWR and BWR assemblies from an open fuel cycle). These waste forms were about 90% of the total waste, and they were the determining waste form in developing the engineered barrier system (EBS) design for the Yucca Mountain Repository design. About 10% of the repository capacity was reserved for waste from a full recycle fuel cycle in which some actinides were extracted for weapons use, and the remaining fission products and some minor actinides were encapsulated in borosilicate glass. Because the heat load of the glass was much less than the PWR and BWR assemblies, the glass waste form was able to be co-disposed with the open cycle waste, by interspersing glass waste packages among the spent fuel assembly waste packages. In addition, the Yucca Mountain repository was designed to include some research reactor spent fuel and naval reactor spent fuel, within the envelope that was set using the commercial reactor assemblies as the design basis waste form. This milestone report supports Sandia National Laboratory milestone M2FT-12SN0814052, and is intended to be a chapter in that milestone report. The independent technical review of this LLNL milestone was performed at LLNL and is documented in the electronic Information Management (IM) system at LLNL. The objective of this work is to investigate what aspects of quantifying, characterizing, and representing the uncertainty associated with the engineered barrier are affected by implementing different advanced nuclear fuel cycles (e.g., partitioning and transmutation scenarios) together with corresponding designs and thermal constraints.

Sutton, M; Blink, J A; Greenberg, H R; Sharma, M

2012-04-25T23:59:59.000Z

255

devil's dictionary of security terms (nov 2013)  

NLE Websites -- All DOE Office Websites (Extended Search)

Devil's Dictionary of Security Terms November 2013 Roger Johnston Vulnerability Assessment Team Argonne National Laboratory Advanced Persistent Threat: (1) A buzzword to...

256

Research Opportunities in Reliability of Photovoltaic Modules (Presentation)  

DOE Green Energy (OSTI)

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

Hacke, P.

2010-05-01T23:59:59.000Z

257

Reliability-Centered Maintenance | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reliability-Centered Maintenance Reliability-Centered Maintenance Reliability-Centered Maintenance October 7, 2013 - 9:48am Addthis Reliability-centered maintenance leverages the same practices and technologies of predictive maintenance. The difference is that reliability-centered maintenance recognizes that: Equipment design and operations differ Different equipment has different probabilities of failure All equipment is not of equal importance to facility operations Facilities have limited financial and personnel resources. While reliability-centered maintenance relies on predictive maintenance practices and technologies, it also recognizes that maintenance on inexpensive and/or unimportant equipment may be better served by a reactive or predictive maintenance approach. Each of the aforementioned factors are

258

NREL: Wind Research - Gearbox Reliability Collaborative  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Research Search More Search Options Site Map Premature gearbox failures have a significant impact on the cost of wind farm operations. In 2007, NREL initiated the Gearbox Reliability Collaborative (GRC). The project combines analysis, field testing, dynamometer testing, condition monitoring, and the development and population of a gearbox failure database in a multi-pronged approach to determine why many wind turbine gearboxes do not achieve their expected design life-the time period that manufacturers expect them to last. Read about: The Gearbox Reliability Collaborative Gearbox Reliability Collaborative Projects Gearbox Reliability Collaborative Research and Development Working with the Gearbox Reliability Collaborative Gearbox Reliability Collaborative Publications

259

Automate feeders to improve reliability  

SciTech Connect

Pacific Gas and Electric Co. (PG and E) improved system reliability and saved money with an alarm and control system for substation distribution switches using remote control by standard telephone-communication links. The method is especially well suited for urban and suburban areas with independent telephone and power systems. The automated systems can also add capability to areas now limited by the emergency capability. The primary distribution alarm and control system has both a substation and a field switch element. Photographs accompanying the description help to explain how the controls work. 7 figures. (DCK)

1981-01-01T23:59:59.000Z

260

2013 Reliability & Markets Peer Review - Day 1 Presentations | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1 Presentations 1 Presentations 2013 Reliability & Markets Peer Review - Day 1 Presentations The Transmission Reliability R&D Reliability & Markets Peer Review included 6 sessions over 2 days on August 6 - 7, 2013. Presentations from Day 1 (Sessions I through IV) are available below. Session I: Ben Hobbs (Johns Hopkins), Kameshwar Poolla (UC Berkeley) Session II: Ray Zimmerman (Cornell), Hsiao-Dong Chiang (Cornell) Session III: Shmuel Oren (UC Berkeley), Dan Tylavsky (U Arizona), Tom Overbye (U Illinois) Session IV: Lindsay Anderson (Cornell), HyungSeon Oh (Cornell) 2013 R&M Peer Review - Assessing Transmission Investments Under Uncertainty - Ben Hobbs, Johns Hopkins 2013 R&M Peer Review - Coordinated Aggregation of Distributed Energy Resources - Kameshwar Poolla, UC Berkeley

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Joint DOE/industry photovoltaic system reliability program  

DOE Green Energy (OSTI)

To achieve the lowest life-cycle cost (LCC), photovoltaic (PV) systems must have the optimum mix of low first cost, low operation and maintenance (O&M) cost, and high availability. Additionally, the long-term health of the photovoltaic (PV) industry requires that PV systems work as expected. Although PV modules now enjoy high reliability due to a significant multi-year effort by both the U.S. Department of Energy (DOE) and industry, the same is not always true of PV systems. Even for systems that do operate reliably, customers, suppliers, and manufacturers can benefit from knowing what O&M expenses to expect. This knowledge will reduce technology risk to the customer and improve likelihood of commitment to PV projects. System integrators and utilities may benefit from O&M cost information to improve system designs, to properly price service agreements and warranties, and to optimize maintenance strategies. The DOE and component manufacturers may benefit from identifying cost drivers to optimally focus research and quality assurance resources to improve product reliability. This paper discusses the first of five tasks identified for this project, quantifying system reliability and life cycle cost by collecting, analyzing and reporting data on PV system reliability and cost. Industry participants collect the necessary O&M data on systems they are monitoring. Sandia provides support in the form of assistance identifying data that needs to be collected, helping develop forms or databases to collect the data, and analyzing the data.

Maish, A.B.; Atcitty, C. [Sandia National Labs., NM (United States); Hester, S. [Utility Photo Voltaic Group, Washington, DC (United States)] [and others

1997-06-01T23:59:59.000Z

262

(Awarded Best Theory Paper!) A Probabilistic Approach to Estimating Computer System Reliability  

Science Conference Proceedings (OSTI)

Probabilistic Risk Assessment (PRA) is a method of estimating system reliability by combining logic models of the ways systems can fail with numerical failure rates. One postulates a failure state and systematically decomposes this state into a combination ...

Robert Apthorpe

2001-12-01T23:59:59.000Z

263

Microgrids and Heterogeneous Security, Quality, Reliability, and Availability  

E-Print Network (OSTI)

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

Marnay, Chris

2007-01-01T23:59:59.000Z

264

Real Time Grid Reliability Management 2005  

E-Print Network (OSTI)

transmission planning to evaluate future needs under different assumptions for resource availability,transmission operators depend on to ensure system reliability. The assumption of availabilitytransmission operators depend on to ensure system reliability. The assumption of traditional governor availability

Eto, Joe

2008-01-01T23:59:59.000Z

265

Correlating Power Quality Indices with System Reliability Indices  

Science Conference Proceedings (OSTI)

Energy companies can use better knowledge about existing power quality to target maintenance efforts, to establish a baseline for offering premium power services, and to use as a selling tool to sell sites with high power quality. Unfortunately, most energy companies do not have widespread, long-term records of power quality needed to provide this information. But energy companies often have good historical records of reliability indices for all circuits on their system (System Average Interruption Frequ...

2005-03-30T23:59:59.000Z

266

How Many Performance Shaping Factors are Necessary for Human Reliability Analysis?  

SciTech Connect

It has been argued that human reliability analysis (HRA) has expended considerable energy on creating detailed representations of human performance through an increasingly long list of performance shaping factors (PSFs). It is not clear, however, to what extent this refinement and expansion of PSFs has enhanced the quality of HRA. Indeed, there is considerable range in the number of PSFs provided by individual HRA methods, ranging from single factor models such as time-reliability curves, up to 50 or more PSFs in some current HRA models. The US Nuclear Regulatory Commission advocates 15 PSFs in its HRA Good Practices (NUREG-1792), while its SPAR-H method (NUREG/CR-6883) espouses the use of eight PSFs and its ATHEANA method (NUREG-1624) features an open-ended number of PSFs. The apparent differences in the optimal number of PSFs can be explained in terms of the diverse functions of PSFs in HRA. The purpose of this paper is to explore the role of PSFs across different stages of HRA, including identification of potential human errors, modeling of these errors into an overall probabilistic risk assessment, quantifying errors, and preventing errors.

Ronald L. Boring

2010-06-01T23:59:59.000Z

267

Reliability Challenges for Solar Energy (Presentation)  

DOE Green Energy (OSTI)

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

Kurtz, S.

2009-12-08T23:59:59.000Z

268

Reliability Considerations from Integration of Smart Grid  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Considerations Considerations from the Integration of Smart Grid 116-390 Village Blvd., Princeton, NJ 08540 609.452.8060 | 609.452.9550 fax www.nerc.com the reliability of the to ensure bulk power system December 2010 (This page intentionally left blank) to ensure the reliability of the bulk power system Reliability Considerations of Integration of Smart Grid i

269

Mathematical Reliability Theory: From The Beginning to . . .  

E-Print Network (OSTI)

It is argued that the mathematical theory of reliability as a separate discipline began in 1961 with the publication of Multi-component systems and their structures and their reliability by Birnbaum, Esary and Saunders. Prior to this time, mathematicians were just applying standard mathematical techniques such as queueing theory, statistics and probability to engineering reliability problems. We

Richard E. Barlow

2002-01-01T23:59:59.000Z

270

Streamlined Reliability Centered Maintenance Analysis Application Update  

Science Conference Proceedings (OSTI)

A systematic evaluation of plant equipment and maintenance requirements using reliability centered maintenance (RCM) techniques can help hold down operating costs while maintaining plant availability and reliability. This report describes the application of streamlined reliability centered maintenance (streamlined RCM) methodology and software at four utilities.

2001-10-18T23:59:59.000Z

271

Human Reliability Analysis for Small Modular Reactors  

Science Conference Proceedings (OSTI)

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.

Ronald L. Boring; David I. Gertman

2012-06-01T23:59:59.000Z

272

Reliability assessment of active residential solar energy systems, Phase I  

SciTech Connect

Experiences with active solar energy systems in the last few years have, in many cases, been less than encouraging. A quantification of the problem areas discovered in a sampling of the active residential solar energy systems in the state of Colorado is presented. While many problems were found, the potential for easy solution of the problems by design or installation refinement is great. Reported is a summary of the findings of the mechanical inspections of twelve systems during the 1978-79 winter. Only one system operated at its expected mechanical, thermal and economic performance level. Four other systems performed well mechanically, but only one of these had thermal performance meeting design expectations. The remaining seven systems did not work well mechanically or thermally. One significantly raised the utility bill of the residence on which it was installed. Poor system design was found to be the major cause of low performance. Also, installation quality was low and installation errors were frequent. Qualified solar system service was virtually unavailable. Nearly all the problems found were solvable using present technology. The greatest immediate need is for training of designers, installers and service people and support of off-market development of total systems.

Sharp, K.

1980-01-01T23:59:59.000Z

273

Guidebook on Advanced Transmission Reliability Assessment and Planning  

Science Conference Proceedings (OSTI)

Major blackouts are usually the outcome of uncontrolled cascades of line and generator outages. Analyses of the 2003 Northeast Blackout150and of every major blackout since implementation of the Federal Energy Regulatory Commission (FERC) Open Access Orders 888 and 889 in 1996150have concluded that system operators likely could have mitigated the extent and damage of the blackout. However, such mitigation could occur only if operators had access to real-time software tools that identified the impending cr...

2009-12-07T23:59:59.000Z

274

Reliability based assessment of FRP rehabilitation of reinforced concrete girders  

E-Print Network (OSTI)

characterization of wet layup carbon/epoxy used in externalcharacterization of wet layup graphite/epoxy composites usedand Durability Prediction of Wet Layup Carbon/Epoxy Used in

Wilcox, Patrick Carlo

2008-01-01T23:59:59.000Z

275

Reliability Assessment of Power Systems with Wind Power Generation.  

E-Print Network (OSTI)

??Wind power generation, the most promising renewable energy, is increasingly attractive to power industry and the whole society and becomes more significant in the portfolio… (more)

Wang, Shu

2008-01-01T23:59:59.000Z

276

RELIABILITY OF WIND POWER FROM DISPERSED SITES: A PRELIMINARY ASSESSMENT  

E-Print Network (OSTI)

SFO SCK RBL II SOB .1I0 SAC SFO SCK SMX RBL :s: z ::r: r tTlGJ tTl (flr n tTl <.N (fl (fl Z .j::. n f-< March BFL SAC SFO SCK SMX

Kahn, E.

2011-01-01T23:59:59.000Z

277

RELIABILITY OF WIND POWER FROM DISPERSED SITES: A PRELIMINARY ASSESSMENT  

E-Print Network (OSTI)

Coincidence of Demand and Wind Resource Diurnal PowerOutput Variations for Three Wind Regimes List of TablesCAPACITY CREDIT FOR WIND ARRAYS: THE PROBLEM . . . . . . .

Kahn, E.

2011-01-01T23:59:59.000Z

278

Assessment of Grid Reliability Benefits and Transfer Gains with Segmentation  

Science Conference Proceedings (OSTI)

Developments in the electric power industry have accentuated the need to resolve problems caused by certain limitations inherent to ac transmission, including inadvertent (parallel and loop) flows, stability and voltage constraints limiting total transfer capability (TTC), the propagation of disturbances capable of producing system separations and cascading outages, limited power densities on rights-of-way, and difficulties in achieving coordinated transmission planning. Segmenting a grid by breaking it ...

2009-12-20T23:59:59.000Z

279

Reliability based assessment of FRP rehabilitation of reinforced concrete girders  

E-Print Network (OSTI)

Girders Strengthened with Carbon Fiber-Reinforced PolymerGirders Strengthened with Carbon Fiber-Reinforced Polymerwith Externally Bonded Carbon Fiber Reinforced Polymer (

Wilcox, Patrick Carlo

2008-01-01T23:59:59.000Z

280

Assessing the reliability of an automated dose-rounding algorithm  

Science Conference Proceedings (OSTI)

Objective: Pediatric dose rounding is a unique and complex process whose complexity is rarely supported by e-prescribing systems, though amenable to automation and deployment from a central service provider. The goal of this project was to validate an ... Keywords: Biomedical informatics, Clinical practice, Computer software, Electronic prescribing, Medical informatics, Prescriptions

Kevin B. Johnson, Yun-Xian Ho, S. Andrew Spooner, Marvin Palmer, Stuart T. Weinberg

2013-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Assessment of Component Reliability Databases for Turbo-XN  

Science Conference Proceedings (OSTI)

EPRI's Turbo-X tool quantifies financial risk associated with decisions on nuclear power plant maintenance, such as extending maintenance intervals and modifying plant operation. Turbo-X was originally developed for fossil plant applications to evaluate the net present value of various operational or maintenance scenarios. Turbo-X compares the probability and corresponding consequential costs of equipment failure against the financial benefits of extending or modifying operations. Future application of t...

2001-11-07T23:59:59.000Z

282

RELIABILITY OF WIND POWER FROM DISPERSED SITES: A PRELIMINARY ASSESSMENT  

E-Print Network (OSTI)

Electric Company, Wind Energy Mission Analysis, COO/2578-C.G. and W.R. Hargraves, Wind Energy Statistics for Largeng Power Supply from Wind Energy Converting Sys t ems, "

Kahn, E.

2011-01-01T23:59:59.000Z

283

A Reliable Natural Language Interface  

E-Print Network (OSTI)

As household appliances grow in complexity and sophistication, they become harder and harder to use, particularly because of their tiny display screens and limited keyboards. This paper describes a strategy for building natural language interfaces to appliances that circumvents these problems. Our approach leverages decades of research on planning and natural language interfaces to databases by reducing the appliance problem to the database problem; the reduction provably maintains desirable properties of the database interface. The paper goes on to describe the implementation and evaluation of the EXACT interface to appliances, which is based on this reduction. EXACT maps each English user request to an SQL query, which is transformed to create a PDDL goal, and uses the Blackbox planner [13] to map the planning problem to a sequence of appliance commands that satisfy the original request. Both theoretical arguments and experimental evaluation show that EXACT is highly reliable.

To Household Appliances; Alexander Yates

2003-01-01T23:59:59.000Z

284

Understanding Bulk Power Reliability: The Importance of Good Data and A  

NLE Websites -- All DOE Office Websites (Extended Search)

Understanding Bulk Power Reliability: The Importance of Good Data and A Understanding Bulk Power Reliability: The Importance of Good Data and A Critical Review of Existing Sources Title Understanding Bulk Power Reliability: The Importance of Good Data and A Critical Review of Existing Sources Publication Type Report Year of Publication 2012 Authors Fisher, Emily, Joseph H. Eto, and Kristina Hamachi LaCommare Pagination 11 Date Published 01/2012 Publisher LBNL City Berkeley Keywords electricity markets and policy group, energy analysis and environmental impacts department, power system reliability, power system reliability metrics, transmission system reliability Abstract 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.

285

Evaluation of Potential Bulk System Reliability Impacts of Distributed Resources  

Science Conference Proceedings (OSTI)

In recent years, distributed energy resources (DER) penetration has increased, but projections for penetration over the next 10 years show dramatic increases. Much of this is made up of distributed solar photovoltaic (PV) power, which is estimated to expand significantly in the United States in coming years. This project describes how methods to assess bulk system reliability might need to be altered to account for increasing levels of DER, particularly PV. It also aims to produce mitigating strategies t...

2011-12-21T23:59:59.000Z

286

Template for Performing Human Reliability Analyses: Lesson Plans  

Science Conference Proceedings (OSTI)

Probabilistic safety analyses (PSA) incorporate human reliability assessment (HRA) to account for possible errors by a nuclear power plant operating crew both prior to and during postulated accidents. Studies have shown that human errors are a large contributor to the likelihood of such accidents; today, the nuclear industry is acutely aware of its importance. A cadre of experts has developed HRA technology by applying it in many risk studies. Examples are reported in the literature. These lesson plans p...

2002-06-07T23:59:59.000Z

287

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

Science Conference Proceedings (OSTI)

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.

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

2011-10-19T23:59:59.000Z

288

Market Manual 11: Reliability Compliance Part 11.3: Reliability  

E-Print Network (OSTI)

A catalogue of the information that is to be shared between the IESO and Market Participants in relation to maintaining the reliability of the IESO-controlled grid Public Disclaimer The posting of documents on this Web site is done for the convenience of market participants and other interested visitors to the IESO Web site. Please be advised that, while the IESO attempts to have all posted documents conform to the original, changes can result from the original, including changes resulting from the programs used to format the documents for posting on the Web site as well as from the programs used by the viewer to download and read the documents. The IESO makes no representation or warranty, express or implied, that the documents on this Web site are exact reproductions of the original documents listed. In addition, the documents and information posted on this Web site are subject to change. The IESO may revise, withdraw or make final these materials at any time at its sole discretion without further notice. It is solely your responsibility to ensure that you are using up-to-date documents and information. This document may contain a summary of a particular market rule. Where provided, the summary has

Information Catalogue

2013-01-01T23:59:59.000Z

289

Risk & Reliability Analysis | Global and Regional Solutions  

NLE Websites -- All DOE Office Websites (Extended Search)

Risk Analysis Group Risk Analysis Group Assessing Potential Hazards in Complex Systems Since the mid-1980s, a core group of Brookhaven scientists has been carrying out risk and reliability assessments of commercial nuclear power plants and other complex technological systems. These scientists - now called the Risk Analysis Group -- have also conducted reviews of risk assessments performed by others, such as utilities, to provide objective assessments to government regulators. Historically, the largest sponsor and customer of the group has been the US Nuclear Regulatory Commission (NRC) but staff members have also performed risk analyses for other domestic agencies such as the Department of Energy (DOE), the Federal Aviation Administration, and the New York State Department of Transportation.

290

Managing Reliability in the 21st Century  

SciTech Connect

The rapid pace of change at Ike end of the 20th Century should continue unabated well into the 21st Century. The driver will be the marketplace imperative of "faster, better, cheaper." This imperative has already stimulated a revolution-in-engineering in design and manufacturing. In contrast, to date, reliability engineering has not undergone a similar level of change. It is critical that we implement a corresponding revolution-in-reliability-engineering as we enter the new millennium. If we are still using 20th Century reliability approaches in the 21st Century, then reliability issues will be the limiting factor in faster, better, and cheaper. At the heart of this reliability revolution will be a science-based approach to reliability engineering. Science-based reliability will enable building-in reliability, application-specific products, virtual qualification, and predictive maintenance. The purpose of this paper is to stimulate a dialogue on the future of reliability engineering. We will try to gaze into the crystal ball and predict some key issues that will drive reliability programs in the new millennium. In the 21st Century, we will demand more of our reliability programs. We will need the ability to make accurate reliability predictions that will enable optimizing cost, performance and time-to-market to meet the needs of every market segment. We will require that all of these new capabilities be in place prior to the stint of a product development cycle. The management of reliability programs will be driven by quantifiable metrics of value added to the organization business objectives.

Dellin, T.A.

1998-11-23T23:59:59.000Z

291

High reliability plastic packaging for microelectronics  

Science Conference Proceedings (OSTI)

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.

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

1997-07-01T23:59:59.000Z

292

CERTS 2012 Program Review - Automatic Reliability Reports (ARR...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

prototype at MISO: Architecture, Grid Monitoring Visualization and Grid Reliability Tracking Grid Automatic Reliability Report (GARR) Page 1 Automatic Reliability Reports (ARR)...

293

Global Nuclear Energy Partnership Fact Sheet - Establish Reliable...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Establish Reliable Fuel Services Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Fuel Services GNEP would build and strengthen a reliable international fuel...

294

Microgrids and Heterogeneous Security, Quality, Reliability, and Availability  

E-Print Network (OSTI)

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

Marnay, Chris

2007-01-01T23:59:59.000Z

295

Electricity Delivery and Energy Reliability | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

296

Load as a reliability resource in restructured electricity markets  

Science Conference Proceedings (OSTI)

Recent electricity price spikes demonstrate the value that demand-side responses could bring to a restructured US electricity system. This report considers how even a modest increase in demand elasticity could dramatically reduce these extremes in price volatility. The report provides a three-part assessment addressing the ability of customer's load to participate in competitive markets and the current and potential future role of customer loads as system reliability resources. The study begins by evaluating the extent to which customer loads might be able to provide electricity reliability or ancillary services and reviewing aspects of a large utility's direct load control program. The second phase of the assessment contains a survey of ways in which load has been used as a system reliability resource focusing on programs triggered by system conditions and a real-time price signal. It reviews the experience of: (1) the California ISO's Demand Relief and Participating Load programs; (2) Interruptible load programs in California; (3) the New England ISO's Load Management program; and (4) a ''mature'' program in New Zealand. The third phase of the assessment examines the status of the underlying metering, communication, and control technologies used to effect customer responses. The final section of the report provides a vision of how the future might look and uses it to outline a program of needed R&D to increase the role of customer loads as system reliability resources. Key elements of this research program include: addressing the needs of system operators, making effective use of load management assets, making use of new program design concepts, the design of end-use technologies, and benefiting from program experiences.

Kueck, J.D.; Kirby, B.J.; Eto, J.; Staunton, R.H.; Marnay, C.; Martinez, A.; Goldman, C.

2001-06-01T23:59:59.000Z

297

Fatigue reliability of wind turbine components  

DOE Green Energy (OSTI)

Fatigue life estimates for wind turbine components can be extremely variable due to both inherently random and uncertain parameters. A structural reliability analysis is used to qualify the probability that the fatigue life will fall short of a selected target. Reliability analysis also produces measures of the relative importance of the various sources of uncertainty and the sensitivity of the reliability to each input parameter. The process of obtaining reliability estimates is briefly outlined. An example fatigue reliability calculation for a blade joint is formulated; reliability estimates, importance factors, and sensitivities are produced. Guidance in selecting distribution functions for the random variables used to model the random and uncertain parameters is also provided. 5 refs., 9 figs., 1 tab.

Veers, P.S.

1990-01-01T23:59:59.000Z

298

Office of Electricity Delivery and Energy Reliability  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Comments of Cisco Systems to Office of Electricity Delivery and Energy Reliability Department of Energy in Response to Request for Information: Addressing Policy and Logistical...

299

Substation reliability -- Practical application and system approach  

SciTech Connect

Practical application of reliability analysis was made for the comparison of alternate line and bus arrangements of a future transmission substation with potential savings of up to $3.6 M. The paper describes how both the substation and the power system were simulated by using computer programs STAREL and COMREL. It presents the method used to obtain the most accurate estimates for the outage data of the system components. Finally, it expresses the results with simple reliability indices which can be meaningful for management. The results of the study show the need to include the reliability of the transmission system in a substation reliability evaluation.

Save, P. [Southern California Edison Co., Rosemead, CA (United States)

1995-02-01T23:59:59.000Z

300

Real Time Grid Reliability Management 2005  

NLE Websites -- All DOE Office Websites (Extended Search)

period, the traditional approach to reliability management - construction of new transmission lines - has not been pursued due to unresolved issues related to the...

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Information Concerning Reliability Impacts under Various System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Impacts under Various System Configurations of the Mirant Potomac River Plant Information Concerning Reliability Impacts under Various System Configurations of the Mirant...

302

design and reliability of solder interconnections  

Science Conference Proceedings (OSTI)

X. Wu, K. Hu, X. Dou, G. Mui, C.-P. Yeh and K. Wyatt. Combined ... Reliability Considerations When Choosing Water Soluble Flux for Electronic Assembly [pp.

303

Mechanical Reliability Study on Porous Brittle Materials  

Science Conference Proceedings (OSTI)

Presentation Title, Mechanical Reliability Study on Porous Brittle Materials. Author(s), Xiaofeng Fan, Eldon D Case, Fei Ren, Yutian Shu, Melissa J Baumann .

304

Improving Wind Turbine Gearbox Reliability: Preprint  

DOE Green Energy (OSTI)

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

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

2007-06-01T23:59:59.000Z

305

CMOS Reliability and Advanced Devices Group  

Science Conference Proceedings (OSTI)

... electron devices for the electronics industry by ... reliability issues in emerging electronic devices. ... Power Device and Thermal Metrology—The Power ...

2013-04-26T23:59:59.000Z

306

Integrated approach to economical, reliable, safe nuclear power production  

SciTech Connect

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.

1982-06-01T23:59:59.000Z

307

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

DOE Green Energy (OSTI)

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.

Granata, Jennifer E.; Quintana, Michael A.; Tasca, Coryne Adelle (SRA International, Inc., Fairfax, VA); Atcitty, Stanley

2011-07-01T23:59:59.000Z

308

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

SciTech Connect

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.

Granata, Jennifer E.; Quintana, Michael A.; Tasca, Coryne Adelle (SRA International, Inc., Fairfax, VA); Atcitty, Stanley

2011-07-01T23:59:59.000Z

309

Philosophy on Vulnerability Assessments  

NLE Websites -- All DOE Office Websites (Extended Search)

capabilities/vat/assess/ capabilities/vat/assess/ ARGONNE NATIONAL LABORATORY, Nuclear Engineering Division, 9700 South Cass Ave., Argonne, IL Philosophy on Vulnerability Assessments Argonne Vulnerability Assessment Team Roger G. Johnston, Ph.D., CPP , 630-252-6168 1. There are a number of conventional tools for finding security vulnerabilities. These include security surveys, risk management, design basis threat, CARVER Method, Delphi Method, software vulnerability assessment tools, infrastructure modeling, etc. 2. These tools have some value, and indeed we have used them all. 3. Experience has shown, however, that these methods do not usually result in dramatic improvements to security, nor do they reliably predict catastrophic security incidents that

310

Nuclear Maintenance Applications Center: Impact of Maintenance Workload on Equipment Reliability  

Science Conference Proceedings (OSTI)

The long-term goal of this project is strategic: to improve and sustain the ability of utilities to focus resources on high value equipment reliability-related tasks by reducing tasks of low value. While mainstream industry initiatives associated with equipment reliability (under INPO AP-913) and work management (under INPO AP-928) continue, this project will begin to accumulate the information necessary to respond to relentless economic pressure expected after the current initiatives become broadly succ...

2010-12-21T23:59:59.000Z

311

The Demand Component of Electric Service: Linkages to Service Reliability and Need for Transparency  

Science Conference Proceedings (OSTI)

This white paper distinguishes the demand component of electric service (measured in kilowatts)distinct from the energy component (measured in kilowatthours)and emphasizes the need for power demand cost transparency. Customers' experience with electric service reliability is described in terms of continuity of electric service, availability of service, and restoration time after service interruption. The paper discusses the connection between power demand and electric service reliability, as experienced ...

2012-08-03T23:59:59.000Z

312

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

NLE Websites -- All DOE Office Websites (Extended Search)

Technology Deployment Energy Systems Integration Gearbox Reliability Collaborative Wind Research Wind Gearbox Reliability Collaborative Search More Search Options Site Map...

313

Ris-R-1235(EN) Reliability Databases  

E-Print Network (OSTI)

.4 Standard models of reliability MIL-HDBK-217 MIL-HDBK-217 was the original standard for reliability-wide. The most recent revision of MIL-HDBK- 217 is Revision F Notice 2, which was released in February of 1995. MIL-HDBK-217 includes the ability to perform a 'parts count' analysis or a 'part stress' analysis

314

Exploratory Reliability and Performance R&D  

DOE Green Energy (OSTI)

This paper presents a brief overview of the status and accomplishments during fiscal year (FY) 2005 of the Photovoltaic (PV) Exploratory Reliability and Performance R&D Subtask, which is part of the PV Module Reliability R&D Project (a joint NREL-Sandia project).

Osterwald, C. R.

2005-11-01T23:59:59.000Z

315

Reliability mathematics analysis on traction substation operation  

Science Conference Proceedings (OSTI)

In electrified railway traction power supply systems, the operational qualities and reliabilities of the main traction transformer loop is higher, but ones of bus output units is comparatively low. The traction transformer loop still works when output ... Keywords: Erlang distribution, Markov theory, life, reliability, traction substation, transformer

Hongsheng Su

2008-11-01T23:59:59.000Z

316

Engineering Reliability into Web Sites: Google SRE  

E-Print Network (OSTI)

Engineering Reliability into Web Sites: Google SRE Alex Perry alex.perry@google.com Santa Monica SRE, Google #12;Abstract This talk introduces Site Reliability Engineering (SRE) at Google, explaining, Santa Monica, Dublin and Kirkland manage Google's many services and websites. They draw upon the Linux

Cortes, Corinna

317

Exact bounds for average pairwise network reliability  

Science Conference Proceedings (OSTI)

Several methods for finding exact bounds of average pairwise network connectivity (APNC) are proposed. These methods allows faster decision making about if a network is reliable for its purpose. Previous results on cumulitive updating of all-terminal ... Keywords: algorithm, network reliability, pairwise connectivity

Alexey Rodionov; Olga Rodionova

2013-01-01T23:59:59.000Z

318

Short-Term Energy Outlook  

Gasoline and Diesel Fuel Update (EIA)

(83/3Q) (83/3Q) Short-Term Energy Outlook iuarterly Projections August 1983 Energy Information Administration Washington, D.C. 20585 t rt jrt- .ort- iort- iort- iort- nort- lort- '.ort- ort- Tt- .-m .erm -Term -Term -Term -Term -Term -Term -Term -Term -Term -Term -Term -Term Term .-Term -Term xrm Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy Energy ^nergy -OJ.UUK Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Outlook Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term Short-Term

319

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

E-Print Network (OSTI)

NREL's Gearbox Reliability Collaborative leads to wind turbine gearbox reliability, lowering have been able to identify shortcomings in the design, testing, and operation of wind turbines findings are quickly shared among GRC participants, including many wind turbine manufacturers and equipment

320

How to Estimate the Value of Service Reliability Improvements  

Science Conference Proceedings (OSTI)

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.

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

2010-06-08T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Reliability of Rechargeable Batteries in a Photovoltaic Power Supply System  

DOE Green Energy (OSTI)

We investigate the reliability If a rechargeable battery acting as the energy storage component in a photovoltaic power supply system. A model system was constructed for this that includes the solar resource, the photovoltaic power supp Iy system, the rechargeable battery and a load. The solar resource and the system load are modeled as SI ochastic processes. The photovoltaic system and the rechargeable battery are modeled deterministically, imd an artificial neural network is incorporated into the model of the rechargeable battery to simulate dartage that occurs during deep discharge cycles. The equations governing system behavior are solved simultaneously in the Monte Carlo framework and a fwst passage problem is solved to assess system reliability.

Barney, P.; Jungst, R.G., Ingersoll, D.; O'Gorman, C.; Paez, T.L.; Urbina, A.

1998-11-30T23:59:59.000Z

322

Information Concerning Reliability Impacts under Various System  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Information Concerning Reliability Impacts under Various System Information Concerning Reliability Impacts under Various System Configurations of the Mirant Potomac River Plant Information Concerning Reliability Impacts under Various System Configurations of the Mirant Potomac River Plant Docket No. EO-05-01: PJM Interconnection, L.L.C. and PEPCO Holdings, Inc. is hereby providing you with additional information concerning reliability impacts under various system conditions associated with the unavailability of the Potomac River Generating Station to serve load in the D.C. area. Also enclosed as part of this submittal is material provided by PEPCO (balance of sentence redacted) In addition, there is a discussion concerning the impacts of demand side response in addressing this situation. Information Concerning Reliability Impacts under Various System

323

Reliability First Corporation | OpenEI  

Open Energy Info (EERE)

Reliability First Corporation Reliability First Corporation Dataset Summary Description This dataset comes from the Energy Information Administration (EIA), and is part of the 2011 Annual Energy Outlook Report (AEO2011). This dataset is table 110, and contains only the reference case. The dataset uses gigawatts, billion kilowatthours and quadrillion Btu. The data is broken down into generating capacity, electricity generation and energy consumption. Source EIA Date Released April 26th, 2011 (3 years ago) Date Updated Unknown Keywords 2011 AEO EIA Gateway Reliability First Corporation SERC Reliability Corporation Data application/vnd.ms-excel icon AEO2011:Renewable Energy Generation by Fuel - SERC Reliability Corporation / Gateway- Reference Case (xls, 118.9 KiB) Quality Metrics Level of Review Peer Reviewed

324

Inventing the future of reliability: FERC's recent orders and the consolidation of reliability authority  

Science Conference Proceedings (OSTI)

The Energy Policy Act of 2005 established mandatory reliability standard enforcement under a system in which the Federal Energy Regulatory Commission and the Electric Reliability Organization would have their own spheres of responsibility and authority. Recent orders, however, reflect the Commission's frustration with the reliability standard drafting process and suggest that the Electric Reliability Organization's discretion is likely to receive less deference in the future. (author)

Skees, J. Daniel

2010-06-15T23:59:59.000Z

325

Power Electronics Reliability Kick Off Meeting Â… Silicon Power Corp. & Sandia Labs  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reliability Reliability Analysis Annual DOE Peer Review Meeting October 8, 2009 Mark A. Smith - Systems Readiness & Sustainment Technologies Department Stan Atcitty - Energy Infrastructure and Distributed Energy Resources Department Sandia National Laboratories Technologies & Customers * Complex Systems Modeling & Simulation * Life Cycle & Total Ownership Costs Analyses * Design for Reliability/Maintainability * Prognostics & Health Management (PHM) * Integrated Logistics Support * Technology Management Optimization * Asset Acquisition & Mission Planning * Risk Assessment & Risk Management Technologies Support Broad Customer Base Automotive Power Electronics Aviation Nuclear Power Coal-Fired Power Petroleum Tools & Technologies Validated Through Broad Use

326

Magnet reliability in the Fermilab Main Injector and implications for the ILC  

Science Conference Proceedings (OSTI)

The International Linear Collider reference design requires over 13000 magnets, of approximately 135 styles, which must operate with very high reliability. The Fermilab Main Injector represents a modern machine with many conventional magnet styles, each of significant quantity, that has now accumulated many hundreds of magnet-years of operation. We review here the performance of the magnets built for this machine, assess their reliability and categorize the failure modes, and discuss implications for reliability of similar magnet styles expected to be used at the ILC.

Tartaglia, M.A.; Blowers, J.; Capista, D.; Harding, D.J.; Kiemschies, O.; Rahimzadeh-Kalaleh, S.; Tompkins, J.C.; /Fermilab

2007-08-01T23:59:59.000Z

327

IEEE TRANSACTIONS ON SMART GRID, VOL. 4, NO. 2, JUNE 2013 1087 Reliability Modeling and Evaluation of Power  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON SMART GRID, VOL. 4, NO. 2, JUNE 2013 1087 Reliability Modeling and Evaluation, and Mirrasoul J. Mousavi, Senior Member, IEEE Abstract--Smart grid technologies leveraging advancements of smart grid monitoring and proposes a mathemat- ical model to assess its impact on power grid reliability

Fu, Yong

328

Definition: Transmission Reliability Margin | Open Energy Information  

Open Energy Info (EERE)

system operation as system conditions change.1 Related Terms transfer capability, transmission lines, system, transmission line References Glossary of Terms Used in...

329

PV Module Reliability R&D Project Overview  

DOE Green Energy (OSTI)

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

Hulstrom, R. L.

2005-01-01T23:59:59.000Z

330

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

DOE Green Energy (OSTI)

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.

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

1983-01-01T23:59:59.000Z

331

Explain Spires Terms  

NLE Websites -- All DOE Office Websites (Extended Search)

Spires terms Enter term below Example:   index :: Browse Examples Search Help :: About Explain SPIRES TopCites HEP Reviews SPIRES News Playground Preprint listings Resources...

332

Glossary Term - Tritium  

NLE Websites -- All DOE Office Websites (Extended Search)

Titans Previous Term (Titans) Glossary Main Index Next Term (Uranus) Uranus Tritium Discovered in 1934, tritium is an unstable isotope of the element hydrogen. An atom of tritium...

333

Glossary Term - Pluto  

NLE Websites -- All DOE Office Websites (Extended Search)

Pallas Previous Term (Pallas) Glossary Main Index Next Term (Positron) Positron Pluto A computer enhanced image of Pluto made from Hubble Space Telescope images taken in 1994....

334

Glossary Term - Cloud Chamber  

NLE Websites -- All DOE Office Websites (Extended Search)

Ceres Previous Term (Ceres) Glossary Main Index Next Term (Composition of the Earth's Atmosphere) Composition of the
Earth's Atmosphere Cloud Chamber A cloud chamber showing the...

335

Glossary Term - Beta Particle  

NLE Websites -- All DOE Office Websites (Extended Search)

Decay Previous Term (Beta Decay) Glossary Main Index Next Term (Bohr Radius) Bohr Radius Beta Particle Beta particles are either electrons or positrons ejected from the nucleus....

336

Glossary Term - Alpha Particle  

NLE Websites -- All DOE Office Websites (Extended Search)

Decay Previous Term (Alpha Decay) Glossary Main Index Next Term (Atomic Number) Atomic Number Alpha Particle alphaparticle.gif Produced during alpha decay, an alpha particle is a...

337

Glossary Term - Deuterium  

NLE Websites -- All DOE Office Websites (Extended Search)

Cyclotron Previous Term (Cyclotron) Glossary Main Index Next Term (Deuteron) Deuteron Deuterium Discovered in 1932 by Harold C. Urey, deuterium is a stable isotope of the element...

338

Glossary Term - Pallas  

NLE Websites -- All DOE Office Websites (Extended Search)

Nucleus Previous Term (Nucleus) Glossary Main Index Next Term (Pluto) Pluto Pallas Pallas is an asteroid located between the orbits of Mars and Jupiter. Discovered on March 28,...

339

Glossary Term - Prometheus  

NLE Websites -- All DOE Office Websites (Extended Search)

Positron Previous Term (Positron) Glossary Main Index Next Term (Proton) Proton Prometheus In Greek mythology, Promethus was the son of the Titan Iapetus. He fought with Zeus...

340

Glossary Term - Neutron Emission  

NLE Websites -- All DOE Office Websites (Extended Search)

Neutron Previous Term (Neutron) Glossary Main Index Next Term (Niobe) Niobe Neutron Emission After neutron emission, an atom contains one less neutron. Neutron emission is one...

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Glossary Term - Atomic Number  

NLE Websites -- All DOE Office Websites (Extended Search)

Particle Previous Term (Alpha Particle) Glossary Main Index Next Term (Avogadro's Number) Avogadro's Number Atomic Number Silver's atomic number is 47 The atomic number is equal to...

342

Glossary Term - Proton Emission  

NLE Websites -- All DOE Office Websites (Extended Search)

Proton Previous Term (Proton) Glossary Main Index Next Term (Quark) Quark Proton Emission After proton emission, an atom contains one less proton. Proton emission is one process...

343

Glossary Term - Cyclotron  

NLE Websites -- All DOE Office Websites (Extended Search)

of the
Earth's Atmosphere Previous Term (Composition of the Earth's Atmosphere) Glossary Main Index Next Term (Deuterium) Deuterium Cyclotron A cyclotron is a device used to...

344

Glossary Term - Proton  

NLE Websites -- All DOE Office Websites (Extended Search)

Prometheus Previous Term (Prometheus) Glossary Main Index Next Term (Proton Emission) Proton Emission Proton A Proton Protons are positively charged particles found within atomic...

345

Glossary Term - Alpha Decay  

NLE Websites -- All DOE Office Websites (Extended Search)

Universe Previous Term (10 Most Abundant Elements in the Universe) Glossary Main Index Next Term (Alpha Particle) Alpha Particle Alpha Decay Alpha Decay Diagram Alpha decay is one...

346

Glossary Term - Neutron  

NLE Websites -- All DOE Office Websites (Extended Search)

Neutrino Previous Term (Neutrino) Glossary Main Index Next Term (Neutron Emission) Neutron Emission Neutron A Neutron Neutrons are uncharged particles found within atomic nuclei....

347

Glossary Term - Isotope  

NLE Websites -- All DOE Office Websites (Extended Search)

Helios Previous Term (Helios) Glossary Main Index Next Term (Joule) Joule Isotope The Three Isotopes of Hydrogen - Protium, Deuterium and Tritium Atoms that have the same number of...

348

Glossary Term - Positron  

NLE Websites -- All DOE Office Websites (Extended Search)

Pluto Previous Term (Pluto) Glossary Main Index Next Term (Prometheus) Prometheus Positron A Positron The antimatter counterpart of the electron, positrons were discovered in 1932...

349

Glossary Term - Niobe  

NLE Websites -- All DOE Office Websites (Extended Search)

Neutron Emission Previous Term (Neutron Emission) Glossary Main Index Next Term (Nucleus) Nucleus Niobe In Greek mythology, Niobe was the daughter of Tantalus. She was punished by...

350

Glossary Term - Lepton  

NLE Websites -- All DOE Office Websites (Extended Search)

Joule Previous Term (Joule) Glossary Main Index Next Term (Liquid Nitrogen) Liquid Nitrogen Lepton Leptons are particles with little mass that interact through the electromagnetic...

351

Status Company Terminal Term  

NLE Websites -- All DOE Office Websites (Extended Search)

Status of Short-Term Applications to Export Previously Imported LNG (as of March 5, 2013) Status Company Terminal Term (Years) Authorized Volume (Equivalent Bcf in natural gas)...

352

ANALYSIS OF AVAILABILITY AND RELIABILITY IN RHIC OPERATIONS.  

SciTech Connect

RHIC has been successfully operated for 5 years as a collider for different species, ranging from heavy ions including gold and copper, to polarized protons. We present a critical analysis of reliability data for RHIC that not only identifies the principal factors limiting availability but also evaluates critical choices at design times and assess their impact on present machine performance. RHIC availability data are typical when compared to similar high-energy colliders. The critical analysis of operations data is the basis for studies and plans to improve RHIC machine availability beyond the 50-60% typical of high-energy colliders.

PILAT, F.; INGRASSIA, P.; MICHNOFF, R.

2006-06-26T23:59:59.000Z

353

Reliability of Materials d C t fand Components for  

E-Print Network (OSTI)

;Background and Objective Requirements for SOFC SealsRequirements for SOFC Seals · Simultaneous fulfillment · To characterize the physical and mechanical properties of candidate SOFC glass seals. *Mahapatra and Lu, J Power Sources, 2010 glass seals. · To assess the effect of long-term exposure to SOFC relevant environments

354

SERC Reliability Corporation | OpenEI  

Open Energy Info (EERE)

SERC Reliability Corporation SERC Reliability Corporation Dataset Summary Description This dataset comes from the Energy Information Administration (EIA), and is part of the 2011 Annual Energy Outlook Report (AEO2011). This dataset is table 113, and contains only the reference case. The dataset uses gigawatts, billion kilowatthours and quadrillion Btu. The data is broken down into generating capacity, electricity generation and energy consumption. Source EIA Date Released April 26th, 2011 (3 years ago) Date Updated Unknown Keywords 2011 AEO Carolina EIA Renewable Energy Generation SERC Reliability Corporation Virginia Data application/vnd.ms-excel icon AEO2011: Renewable Energy Generation by Fuel - SERC Reliability Corporation / Virginia-Carolina- Reference Case (xls, 118.9 KiB) Quality Metrics

355

PV Module Reliability Research (Fact Sheet)  

DOE Green Energy (OSTI)

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.

Not Available

2013-06-01T23:59:59.000Z

356

Reliability Issues for Photovoltaic Modules (Presentation)  

DOE Green Energy (OSTI)

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.

Kurtz, S.

2009-10-01T23:59:59.000Z

357

Demand Response For Power System Reliability: FAQ  

SciTech Connect

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.

Kirby, Brendan J [ORNL

2006-12-01T23:59:59.000Z

358

System Software Reliability, 1st edition  

Science Conference Proceedings (OSTI)

Computer software reliability has never been so important. Computers are used in areas as diverse as air traffic control, nuclear reactors, real-time military, industrial process control, security system control, biometric scan-systems, automotive, mechanical ...

H. Pham

2010-12-01T23:59:59.000Z

359

Reliability Challenges for Solar Energy (Presentation)  

DOE Green Energy (OSTI)

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.

Kurtz, S.

2009-04-27T23:59:59.000Z

360

Photovoltaic Reliability and Engineering (Revised) (Fact Sheet)  

DOE Green Energy (OSTI)

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

Not Available

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Gearbox Reliability Collaborative (GRC) Description and Loading  

SciTech Connect

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.

Oyague, F.

2011-11-01T23:59:59.000Z

362

EPRI Distribution Reliability Practices Repository V2  

Science Conference Proceedings (OSTI)

A key objective of EPRI's research into distribution reliability practices is to identify, document and provide practice summary descriptions to research participants in a format that facilitates comparison and aids decision-makers in identifying those practices in place at other utilities which can be applied to their utility to improve performance. This research report presents distribution reliability practice results from six different companies in a repository which places ...

2013-11-27T23:59:59.000Z

363

CHEMICAL ENGINEERING Fall Term Spring Term  

E-Print Network (OSTI)

CHEMICAL ENGINEERING CURRICULUM Fall Term Spring Term EGGG 101 Introduction to Engineering (FYE) 2 CHEG 112 Introduction to Chemical Engineering 3 CHEM 111 General Chemistry 3 CHEM 112 General Chemistry and Writing 3 Breadth Requirement Elective 1 3 15 17 CHEG 231 Chemical Engineering Thermodynamics 3 CHEG 325

Lee, Kelvin H.

364

CHEMICAL ENGINEERING Fall Term Spring Term  

E-Print Network (OSTI)

CHEMICAL ENGINEERING CURRICULUM FALL 2010 Fall Term Spring Term EGGG 101 Introduction to Chemical Engineering 3 MATH 242 Analytic Geometry & Calculus B 4 MATH 243 Analytic Geometry & Calculus C 4 Critical Reading and Writing 3 Breadth Requirement Elective 1 3 15 17 CHEG 231 Chemical Engineering

Lee, Kelvin H.

365

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

DOE Green Energy (OSTI)

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

Stein, Joshua S.; Miller, Steven P.

2010-03-01T23:59:59.000Z

366

Electric Power Reliability in Chemical Plants  

E-Print Network (OSTI)

The quality and reliability of utility-generated electric power is presently receiving a great deal of attention from the chemical and refining industry. What changes have taken place to make electric power reliability a major topic of discussion 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 of microprocessor-based equipment and controllers? The differing views held by both parties tend to make their relationship adversarial. Both parties have problems with their individuals views and the associated monetary costs, which can be either a loss or a gain. Improved reliability for the chemical plant means less "off spec" product, thereby resulting in more product to sell. Improved reliability for the utility means less customer downtime, thereby resulting in more KWH sales and a higher capacity factor. The biggest limiting factor to solving the actual problems is the dollar cost associated with that solution. Each solution must have a payback period that meets the economic criteria for return on investment for either the industry or the utility.

Cross, M. B.

1989-09-01T23:59:59.000Z

367

Glossary of Terms  

Science Conference Proceedings (OSTI)

...Glossary of Terms, Surface Engineering, Vol 5, ASM Handbook, ASM International, 1994, p 944â??973...

368

Financial and Economic Terms  

E-Print Network (OSTI)

This publication lists and defines many financial and economic terms with which producers should be familiar.

McCorkle, Dean; Klinefelter, Danny A.

2008-12-05T23:59:59.000Z

369

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

DOE Green Energy (OSTI)

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.

Menicucci, David F. (Building Specialists, Inc., Albuquerque, NM)

2011-07-01T23:59:59.000Z

370

Measuring Short-term Air Conditioner Demand Reductions for Operations and  

NLE Websites -- All DOE Office Websites (Extended Search)

Measuring Short-term Air Conditioner Demand Reductions for Operations and Measuring Short-term Air Conditioner Demand Reductions for Operations and Settlement Title Measuring Short-term Air Conditioner Demand Reductions for Operations and Settlement Publication Type Report LBNL Report Number LBNL-5330E Year of Publication 2012 Authors Bode, Josh, Michael J. Sullivan, and Joseph H. Eto Pagination 120 Date Published 01/2012 Publisher LBNL City Berkeley Keywords consortium for electric reliability technology solutions (certs), electricity markets and policy group, energy analysis and environmental impacts department Abstract Several recent demonstrations and pilots have shown that air conditioner (AC) electric loads can be controlled during the summer cooling season to provide ancillary services and improve the stability and reliability of the electricity grid. A key issue for integration of air conditioner load control into grid operations is how to accurately measure shorter-term (e.g., ten's of minutes to a couple of hours) demand reductions from AC load curtailments for operations and settlement. This report presents a framework for assessing the accuracy of shorter-term AC load control demand reduction measurements. It also compares the accuracy of various alternatives for measuring AC reductions - including methods that rely on regression analysis, load matching and control groups - using feeder data, household data and AC end-use data. A practical approach is recommended for settlement that relies on set of tables, updated annually, with pre-calculated load reduction estimates. The tables allow users to look up the demand reduction per device based on the daily maximum temperature, geographic region and hour of day and simplify the settlement process.

371

Reliabilit PlanningReliability Planning David Duebner, Expansion Planningp g  

E-Print Network (OSTI)

EE552 Reliabilit PlanningReliability Planning David Duebner, Expansion Planningp g September 27, 2010 #12;Reliability Planning OverviewReliability Planning Overview · Midwest ISO Transmission Expansion Plan (MTEP)p ( ) · MTEP Reliability Study Process ­ Planning Criteriag ­ Reliability Analysis

McCalley, James D.

372

Emergency Diesel Generator reliability at Department of Energy (DOE) facilities  

Science Conference Proceedings (OSTI)

This report is the culmination of the first phase of a comprehensive effort by the Department of Energy (DOE) Defense Programs (DP) Office of Self-Assessment and Emergency Management (DP-9) to assess the reliability and availability of emergency power supplies (i.e., standby or backup supplies providing electric power to systems or equipment that perform functions important to safety) at DOE management concerns over the recent number of reported failures of emergency and back-up supplies to provide power when required. Augmented Evaluation Team (AET) on-site reviews were conducted during the week of September 30, 1991 at Rocky Flats (RF), and the week of October 7, 1991 at the Richland (RL) and Savannah River (SR) sites to investigate the failures. The AET reviews focused on Emergency Diesel Generator (EDG) failures because they were identified as the dominant contributor to power supply failures (46 of the 77 failures involved EDGs, as opposed to other sources such as batteries, motor-generator sets, etc.). The RF, RL, and SR sites were chosen because they were among the leaders in numbers of EDG failures. The objectives of the AET investigations were to collect, analyze, and document factual information concerning the causes, conditions, and circumstances surrounding EDG failures, to conduct a preliminary assessment of the safety significance of the failures and the site specific and generic safety implications for DOE facilities, and to identify appropriate follow-on actions necessary to complete the overall assessment of the adequacy of emergency and back-up power sources. This report presents the AET findings concerning the reliability of EDGs at the RF, RL, and SR sites, and the safety significance of EDG failures.

Not Available

1992-04-01T23:59:59.000Z

373

Accelerated testing of metal foil tape joints and their effect of photovoltaic module reliability.  

DOE Green Energy (OSTI)

A program is underway at Sandia National Laboratories to predict long-term reliability of photovoltaic (PV) systems. The vehicle for the reliability predictions is a Reliability Block Diagram (RBD), which models system behavior. Because this model is based mainly on field failure and repair times, it can be used to predict current reliability, but it cannot currently be used to accurately predict lifetime. In order to be truly predictive, physics-informed degradation processes and failure mechanisms need to be included in the model. This paper describes accelerated life testing of metal foil tapes used in thin-film PV modules, and how tape joint degradation, a possible failure mode, can be incorporated into the model.

Puskar, Joseph David; Quintana, Michael A.; Sorensen, Neil Robert; Lucero, Samuel J.

2009-07-01T23:59:59.000Z

374

Materials Reliability Program: Pressurized Water Reactor Internals Inspection and Evaluation Guidelines (MRP-227-A)  

Science Conference Proceedings (OSTI)

The Materials Reliability Program (MRP) developed inspection and evaluation (I&E) guidelines for managing long-term aging reactor vessel internal components of pressurized water reactors (PWRs) reactor internals. Specifically, the guidelines are applicable to reactor vessel internal structural components; they do not address fuel assemblies, reactivity control assemblies, or welded attachments to the reactor vessel.

2011-12-23T23:59:59.000Z

375

Evaluation of conventional electric power generating industry quality assurance and reliability practices  

DOE Green Energy (OSTI)

The techniques and practices utilized in an allied industry (electric power generation) that might serve as a baseline for formulating Quality Assurance and Reliability (QA and R) procedures for photovoltaic solar energy systems were studied. The study results provide direct near-term input for establishing validation methods as part of the SERI performance criteria and test standards development task.

Anderson, R.T.; Lauffenburger, H.A.

1981-03-01T23:59:59.000Z

376

California ISO Real-Time Voltage Security Assessment (VSA) Project...  

NLE Websites -- All DOE Office Websites (Extended Search)

Arnold Schwarzenegger Governor REAL-TIME GRID RELIABILITY MANAGEMENT California ISO Real-Time Voltage Security Assessment (VSA) Project: Summary of Survey Results on Methodologies...

377

Electricity Delivery and Energy Reliability PROGRAM DESCRIPTION  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2 2 Electricity Delivery and Energy Reliability PROGRAM DESCRIPTION The Office of Electricity Delivery and Energy Reliability (OE) leads national efforts to modernize the electric grid, enhance security and reliability of energy infrastructure, and facilitate recovery from disruptions to the energy supply. As stated in the President's A Policy Framework for the 21 st Century Grid, a smarter, modernized electric grid is fundamental to transforming the Nation's energy system and securing US leadership in a clean energy future. OE supports activities that enable innovation across the energy sector, empower American consumers, and secure our energy future. OE consists of three programs: Research and Development; Permitting, Siting and Analysis; and Infrastructure Security and Energy Restoration.

378

Smart Grid: Creating Jobs while Delivering Reliable,  

Open Energy Info (EERE)

Smart Grid: Creating Jobs while Delivering Reliable, Smart Grid: Creating Jobs while Delivering Reliable, Environmentally-friendly Energy Home > Groups > OpenEI Community Central Graham7781's picture Submitted by Graham7781(1992) Super contributor 2 March, 2010 - 14:14 imported OpenEI On April 16th, 2009, Vice President Joe Biden announced that the Department of Energy was planning to develop a stronger, more reliable energy grid. The plan would allocate $3.4 billion in funds to be distributed across the nation, aiding projects aimed at improving and updating the current electrical power grid in the United States. Two projects are funded by smart grid: smaller and larger. Smaller projects range from $300,000 to $20,000,000. These projects typically focus on upgrading equipment in less populated ares. Larger projects range from

379

Nuclear Power - Control, Reliability and Human Factors  

E-Print Network (OSTI)

Advances in reactor designs, materials and human-machine interfaces guarantee safety and reliability of emerging reactor technologies, eliminating possibilities for high-consequence human errors as those which have occurred in the past. New instrumentation and control technologies based in digital systems, novel sensors and measurement approaches facilitate safety, reliability and economic competitiveness of nuclear power options. Autonomous operation scenarios are becoming increasingly popular to consider for small modular systems. This book belongs to a series of books on nuclear power published by InTech. It consists of four major sections and contains twenty-one chapters on topics from key subject areas pertinent to instrumentation and control, operation reliability, system aging and human-machine interfaces. The book targets a broad potential readership group - students, researchers and specialists in the field - who are interested in learning about nuclear power.

Tsvetkov, Pavel

2011-09-01T23:59:59.000Z

380

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

NLE Websites -- All DOE Office Websites (Extended Search)

Understanding Bulk Power Reliability: Understanding Bulk Power Reliability: The Importance of Good Data and A Critical Review of Existing Sources Emily Fisher Lawrence Berkeley National Laboratory esfisher@lbl.gov Joseph H. Eto Lawrence Berkeley National Laboratory jheto@lbl.gov Kristina Hamachi LaCommare Lawrence Berkeley National Laboratory kshamachi@lbl.gov Abstract 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

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

382

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

NLE Websites -- All DOE Office Websites (Extended Search)

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

383

Reliability of islanded microgrids with stochastic generation and prioritized load  

E-Print Network (OSTI)

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 ...

Marden, Mirjana Milosevic

384

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

385

An Examination of Temporal Trends in Electricity Reliability...  

NLE Websites -- All DOE Office Websites (Extended Search)

An Examination of Temporal Trends in Electricity Reliability Based on Reports from U.S. Electric Utilities Title An Examination of Temporal Trends in Electricity Reliability Based...

386

Office of Electricity Delivery and Energy Reliability: Organizational...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Skip to main content Energy.gov Office of Electricity Delivery & Energy Reliability Search form Search Office of Electricity Delivery & Energy Reliability Services Electricity...

387

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

388

Cyber Effects Analysis Using VCSE Promoting Control System Reliability...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Cyber Effects Analysis Using VCSE Promoting Control System Reliability Cyber Effects Analysis Using VCSE Promoting Control System Reliability This report describes the Virtual...

389

Office of Electricity Delivery & Energy Reliability 2010 Strategic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

You are here Home Office of Electricity Delivery & Energy Reliability 2010 Strategic Plan (WEB) Office of Electricity Delivery & Energy Reliability 2010 Strategic Plan...

390

Office of Electricity and Delivery & Energy Reliability 2010...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

You are here Home Office of Electricity and Delivery & Energy Reliability 2010 Strategic Plan (PRINT) Office of Electricity and Delivery & Energy Reliability 2010 Strategic...

391

Efficient and Reliable Reactive Power Supply and Consumption...  

NLE Websites -- All DOE Office Websites (Extended Search)

Efficient and Reliable Reactive Power Supply and Consumption - Insights from an Integrated Program of Engineering and Economics Research Title Efficient and Reliable Reactive Power...

392

Glossary Term - Avogadro's Number  

NLE Websites -- All DOE Office Websites (Extended Search)

Atomic Number Previous Term (Atomic Number) Glossary Main Index Next Term (Beta Decay) Beta Decay Avogadro's Number Avogadro's number is the number of particles in one mole of a...

393

Glossary Term - Vanadis  

NLE Websites -- All DOE Office Websites (Extended Search)

Van de Graaff Generator Previous Term (Van de Graaff Generator) Glossary Main Index Next Term (10 Most Abundant Compounds in the Earth's Crust) 10 Most Abundant Compounds
in the...

394

Glossary Term - Liquid Nitrogen  

NLE Websites -- All DOE Office Websites (Extended Search)

Lepton Previous Term (Lepton) Glossary Main Index Next Term (Mercury) Mercury Liquid Nitrogen Liquid nitrogen boils in a frying pan on a desk. The liquid state of the element...

395

Glossary Term - Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Liquid Nitrogen Previous Term (Liquid Nitrogen) Glossary Main Index Next Term (Mole) Mole Mercury Mercury as seen by the Mariner 10 spacecraft on March 24, 1974. Mercury is the...

396

Glossary Term - Mole  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Previous Term (Mercury) Glossary Main Index Next Term (Neptune) Neptune Mole A mole of a substance is the mass, in grams, that is numerically equal to that substance's...

397

Glossary Term - Helios  

NLE Websites -- All DOE Office Websites (Extended Search)

Half-life Previous Term (Half-life) Glossary Main Index Next Term (Isotope) Isotope Helios The sun seen in Hydrogen-alpha light. In Greek mythology, Helios was god of the sun....

398

Glossary Term - Nucleus  

NLE Websites -- All DOE Office Websites (Extended Search)

Niobe Previous Term (Niobe) Glossary Main Index Next Term (Pallas) Pallas Nucleus The nucleus of a nitrogen-14 atom. Discovered by Ernest Rutherford in 1911, the nucleus is the...

399

Glossary Term - Deuteron  

NLE Websites -- All DOE Office Websites (Extended Search)

Deuterium Previous Term (Deuterium) Glossary Main Index Next Term (Dry Ice) Dry Ice Deuteron A Deuteron The nucleus of a deuterium atom. A deuteron consists of one proton and one...

400

Glossary Term - Joule  

NLE Websites -- All DOE Office Websites (Extended Search)

Isotope Previous Term (Isotope) Glossary Main Index Next Term (Lepton) Lepton Joule A joule is the amount of work done when a force of one Newton is applied through a distance of...

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Glossary Term - Catalyst  

NLE Websites -- All DOE Office Websites (Extended Search)

Bohr Radius Previous Term (Bohr Radius) Glossary Main Index Next Term (Ceres) Ceres Catalyst A catalyst is a substance that increases the speed of a chemical reaction without being...

402

Glossary Term - Thor  

NLE Websites -- All DOE Office Websites (Extended Search)

Tantalus Previous Term (Tantalus) Glossary Main Index Next Term (Titans) Titans Thor In Norse mythology, Thor is the god of thunder and the son of Odin and Earth. Thor possesses a...

403

Glossary Term - Titans  

NLE Websites -- All DOE Office Websites (Extended Search)

Thor Previous Term (Thor) Glossary Main Index Next Term (Tritium) Tritium Titans In Greek mythology, the Titans are the offspring of Earth and Sky and ruled before being overthrown...

404

Glossary Term - Gluon  

NLE Websites -- All DOE Office Websites (Extended Search)

Volt (eV) Previous Term (Electron Volt (eV)) Glossary Main Index Next Term (Half-life) Half-life Gluon Gluons are the particles responsible for binding quarks to each other....

405

Glossary Term - Dry Ice  

NLE Websites -- All DOE Office Websites (Extended Search)

Deuteron Previous Term (Deuteron) Glossary Main Index Next Term (Electron) Electron Dry Ice A block of dry ice sublimating on a table. Dry ice is the solid form of carbon dioxide...

406

Gearbox Reliability Collaborative Update: A Brief (Presentation)  

DOE Green Energy (OSTI)

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.

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

2012-01-01T23:59:59.000Z

407

Gearbox Reliability Collaborative Update: A Brief (Presentation)  

SciTech Connect

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.

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

2012-01-01T23:59:59.000Z

408

Final Site-Wide Environmental Assessment of National Renewable Energy Laboratory's National Wind Technology Center  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

May 31, 2002 May 31, 2002 DOE/EA 1378 FINDING OF NO SIGNIFICAflJT IMPACT For the NATIONAL WIND TECHNOLOGY CENTER Site Operations and Short-Term and Long-Term Improvement Programs Golden, Colorado AGENCY: Department of Energy, Golden Field Office ACTION: Finding of No Significant Impact SUMMARY: The Department of Energy (DOE) conducted a Site-Wide Environmental Assessment (EA) of the National Wind Technology Center (NWTC) to evaluate potential impacts of site operations and short-term and long-term improvement programs. DOE's Office of Energy Efficiency and Renewable Energy (EERE) leads the national research effort to develop clean, competitive, and reliable renewable energy and power delivery technologies for the 21st century. The mission of EERE's Wind Energy Program is to help the

409

Glossary of Sewing Terms  

E-Print Network (OSTI)

This publication lists common terms used in sewing. It includes definitions of garment types, fabric qualities, notions and construction procedures.

2006-05-01T23:59:59.000Z

410

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

E-Print Network (OSTI)

(among others) SmartGrids, FACTS devices, and large-scale integration of distributed energy resources

Paris-Sud XI, Université de

411

Impact of Isothermal Aging on Long Term Reliability of Fine Pitch ...  

Science Conference Proceedings (OSTI)

Based on weibull plots for each condition, the lifetime of the package reduced approximately 45% with 150oC aging precondition and with longer ...

412

Review and validation of exposure assessment methods  

E-Print Network (OSTI)

The purpose of this research is twofold, to standardize and to validate exposure assessment methods. First, the attempt is made to standardize the manner in which exposure assessment methods are developed. Literature on the subject is reviewed and seven common elements discovered to be common are discussed. The seven elements are causative agents, exposure groups, exposure-modifying parameters, industrial hygiene measurement data, misclassification issues, validation issues, and reliability issues. It is believed that thinking in terms of these elements will yield more consistent and complete exposure assessment models. Three types of exposure estimation methods are reviewed in this form. These methods are selected because they are the most thorough and represent the most frequently used and referenced types of estimation strategies: the statistical model, the deterministic model, and the multiplicative model. Second, the paper reports on an attempt to validate a semiquantitative exposure assessment model against industrial hygiene data collected from employees of one firm in the maritime industry. The set of data contains 440 samples with 75 percent of them censored by the method limit of detection. Methods to calculate an average concentration with nondetectable data are discussed. It is concluded that (1) the model does not predict the data well, (2) the industrial hygiene data does not properly fit the tails of a lognormal distribution, and (3) that average exposure to benzene in the (un)loading of petrochemicals from tankers is decidedly below exposure limits.

Shaw, Eduardo

2001-01-01T23:59:59.000Z

413

Reliability-based Design of Offshore Mooring Systems  

E-Print Network (OSTI)

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 objective is the calculation of the probability of failure of a structural system, which is an important input for a reliability-based design or any quantitative risk assessment. Two different methods are proposed for calculation of the probability of failure: a method based on the Monte Carlo simulations and a method based on the basic rules of probability, which is called the Progressive Reliability Method (PRM). Both methods are flexible to the definition of system failure. For example, the probability of a serviceability or ultimate-strength failure can be assessed using any of the two methods. It is shown that the two methods produce similar results, but PRM is preferred because it is exact and usually faster to implement. The second main objective in this dissertation is to develop a method for the optimization of the design of a structural system, given a target probability of failure. In this method, using the structural analysis of a preliminary design, the ratio of the optimal to the preliminary mean capacity of each component, which is called the Optimality Factor, is determined. Two design strategies are considered. First, an optimal design is intended to achieve the maximum system integrity. System integrity is defined as the balanced contribution of system components to its reliability. To quantify the system integrity, the Integrity Index is defined, and its calculation for various systems is discussed. Second, a designated failure scenario is considered, where some components serve as a fuse to protect some other components. This design strategy is especially applicable to mooring systems with drag anchor foundations because normally, if a drag anchor is pulled out from the seabed, it can cause significant damages to nearby subsea facilities. Using the rules of probability, a method is then developed to calculate the optimality factor of each component.

Mousavi, Mir Emad

2013-05-01T23:59:59.000Z

414

Assessment of Preferred Depleted Uranium Disposal Forms  

SciTech Connect

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

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

2000-06-01T23:59:59.000Z

415

Design Evolution, Durability and Reliability of General Electric Aeroderivative Gas Turbines  

Science Conference Proceedings (OSTI)

This report reviews the design evolution and experience base of General Electric (GE) aeroderivative gas turbines in a comprehensive format, which facilitates an assessment of the technical risks involved in operating these high-technology gas turbines. The report establishes a pedigree matrix for standard production GE LM2500, LM6000, and LMS100 aeroderivative gas turbines, describing their design features. In addition, it provides a reliability, availability, and maintainability (RAM) assessment ...

2012-12-07T23:59:59.000Z

416

Reliable and efficient reprogramming in sensor networks  

Science Conference Proceedings (OSTI)

Retasking and remote programming of sensor networks is an essential functionality to make these networks practical and effective. As the availability of more capable sensor nodes increases and new functional implementations continue to be proposed, these ... Keywords: Broadcast, energy efficiency, minimum energy broadcast, reliable distribution, reprogramming, retasking, sensor networks

Chris Miller; Christian Poellabauer

2010-08-01T23:59:59.000Z

417

Granite Reliable Power | Open Energy Information  

Open Energy Info (EERE)

Reliable Power Reliable Power Jump to: navigation, search Name Granite Reliable Power Facility Granite Reliable Power Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Brookfield Renewable Energy Group Developer Brookfield Renewable Energy Group Energy Purchaser Green Mountain Power / Central Vermont Public Service / New England Power Pool Location Milan NH Coordinates 44.74039314°, -71.28376007° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.74039314,"lon":-71.28376007,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

418

Guidelines for New High Reliability Fossil Plants  

Science Conference Proceedings (OSTI)

The purity of water and steam is central to ensuring fossil plant component availability and reliability. New plants should have the optimum cycle chemistry features designed in, and the guidelines provided in this report will assist owners and operators of new plants in specifying these features during the design phase.

2007-02-26T23:59:59.000Z

419

Reliability and maintainability seminar: summary of proceedings  

DOE Green Energy (OSTI)

The following are described briefly: Overview of the Federal Reliability and Maintainability Program Plan, Summary of Proceedngs, Overview of Southern Solar Energy Center Programs, and Solar Domestic Hot Water Design Guidelines Handbook. Also included are the Seminar Agenda and the list of Seminar Attendees. (MHR)

Beek, C.R.

1981-04-01T23:59:59.000Z

420

Reliability of underwater hearing thresholds in pinnipeds  

E-Print Network (OSTI)

Reliability of underwater hearing thresholds in pinnipeds Brandon L. Southall Long Marine@ucsc.edu Abstract: Repeated measures of low-frequency underwater hearing sensi- tivity in individuals of three and certain testing parameters (e.g., equipment and research personnel), measured underwater hearing

Reichmuth, Colleen

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

An ATM Adaptation Layer for Reliable Transfers  

Science Conference Proceedings (OSTI)

There has been much attention given to ATM Adaptation Layers (AAL) over the ten-year history of ATM standardization. Yet none of the existing standards include a retransmission protocol to ensure reliability of the transfers. In this paper we propose ...

Gunnar Karlsson

1996-09-01T23:59:59.000Z

422

Reliability enhancement using optimal distribution feeder reconfiguration  

Science Conference Proceedings (OSTI)

Failure statistics show that distribution networks engage the most contribution to the customer unavailability services. Optimal reconfiguration of distribution systems has many advantages like total power losses reduction, voltage profile enhancement, ... Keywords: AENS, DFR, Distribution feeder reconfiguration (DFR), ISFLA, Improved shuffled frog leaping algorithm (ISFLA), MDFR, Multiobjective optimization, Reliability enhancement, SAIDI, SAIFI

Abdollah Kavousi-Fard; Mohammad-Reza Akbari-Zadeh

2013-04-01T23:59:59.000Z

423

A Preliminary Approach to Human Reliability Analysis for External Events with a Focus on Seismic  

Science Conference Proceedings (OSTI)

Substantial research has been performed to-date to develop and improve methods to perform Human Reliability Analysis (HRA) in support of Probabilistic Risk Assessment (PRA). Existing HRA methods, however, were developed primarily for internal events PRA and PRA applications. These methods often contain underlying assumptions that may or may not be applicable to the challenging and new environment created by an ...

2012-12-12T23:59:59.000Z

424

Using Accelerated Testing To Predict Module Reliability: Preprint  

DOE Green Energy (OSTI)

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.

Wohlgemuth, J. H.; Kurtz, S.

2011-07-01T23:59:59.000Z

425

Current Human Reliability Analysis Methods Applied to Computerized Procedures  

SciTech Connect

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.

Ronald L. Boring

2012-06-01T23:59:59.000Z

426

Design Strategy for a Formally Veri ed Reliable Computing Platform  

E-Print Network (OSTI)

. Pecht, Ed., Product Reliability, Maintainability, and Supportability Hdbk: CRC Press, 1995. [12] A

Butler, Ricky W.

427

Mixture representations for the reliability of consecutive-k systems  

Science Conference Proceedings (OSTI)

In this paper, we obtain representations for the reliability of consecutive type systems as a mixture of the reliability of order statistics whenever the systems consist of exchangeable components. The representations enable us to compute the reliability ... Keywords: Consecutive k-out-of- n system, Consecutive k-within-m-out-of-n system, Maximal signature, Minimal signature, Order statistics, System reliability, System signature

Serkan Ery?Lmaz

2010-03-01T23:59:59.000Z

428

NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary Disturbance Report  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary Disturbance Report NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary Disturbance Report The following information represents a partial sequence of events based upon Reliability Coordinator information available to NERC. It is not clear if these events caused the event or were a consequence of other events. NERC is establishing teams to study the event and will coordinate with FERC, DOE, the industry and others. NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary Disturbance Report More Documents & Publications North American Electric Reliability Council Power Outage Update North American Electric Reliability Council Outage Announcement U.S. - Canada Power System Outage Task Force: Final Report on the

429

Federal Energy Management Program: Reliability-Centered Maintenance  

NLE Websites -- All DOE Office Websites (Extended Search)

Reliability-Centered Maintenance to someone by E-mail Share Federal Energy Management Program: Reliability-Centered Maintenance on Facebook Tweet about Federal Energy Management Program: Reliability-Centered Maintenance on Twitter Bookmark Federal Energy Management Program: Reliability-Centered Maintenance on Google Bookmark Federal Energy Management Program: Reliability-Centered Maintenance on Delicious Rank Federal Energy Management Program: Reliability-Centered Maintenance on Digg Find More places to share Federal Energy Management Program: Reliability-Centered Maintenance on AddThis.com... Sustainable Buildings & Campuses Operations & Maintenance Federal Requirements Program Management Commissioning Metering Computerized Maintenance Management Systems

430

Terms and Conditions  

NLE Websites -- All DOE Office Websites (Extended Search)

Terms and Conditions Terms and Conditions Terms and Conditions As a premier national research and development laboratory, LANL seeks to do business with qualified companies that offer value and high quality products and services. Contact Small Business Office (505) 667-4419 Email Use information below as guideline to doing business An "Appendix SFA-1" contains FAR and DEAR Clauses that are incorporated by reference into a particular subcontract. "Exhibit A General Conditions" are the general terms and conditions applicable to a particular subcontract. Note: The contents of the SFA-1 and Exhibit A (below) are not the only terms and conditions that will be in a LANS subcontract but represent the terms that generally do not change in a particular type of procurement. The

431

Wind turbine reliability : understanding and minimizing wind turbine operation and maintenance costs.  

SciTech Connect

Wind turbine system reliability is a critical factor in the success of a wind energy project. Poor reliability directly affects both the project's revenue stream through increased operation and maintenance (O&M) costs and reduced availability to generate power due to turbine downtime. Indirectly, the acceptance of wind-generated power by the financial and developer communities as a viable enterprise is influenced by the risk associated with the capital equipment reliability; increased risk, or at least the perception of increased risk, is generally accompanied by increased financing fees or interest rates. Cost of energy (COE) is a key project evaluation metric, both in commercial applications and in the U.S. federal wind energy program. To reflect this commercial reality, the wind energy research community has adopted COE as a decision-making and technology evaluation metric. The COE metric accounts for the effects of reliability through levelized replacement cost and unscheduled maintenance cost parameters. However, unlike the other cost contributors, such as initial capital investment and scheduled maintenance and operating expenses, costs associated with component failures are necessarily speculative. They are based on assumptions about the reliability of components that in many cases have not been operated for a complete life cycle. Due to the logistical and practical difficulty of replacing major components in a wind turbine, unanticipated failures (especially serial failures) can have a large impact on the economics of a project. The uncertainty associated with long-term component reliability has direct bearing on the confidence level associated with COE projections. In addition, wind turbine technology is evolving. New materials and designs are being incorporated in contemporary wind turbines with the ultimate goal of reducing weight, controlling loads, and improving energy capture. While the goal of these innovations is reduction in the COE, there is a potential impact on reliability whenever new technologies are introduced. While some of these innovations may ultimately improve reliability, in the short term, the technology risks and the perception of risk will increase. The COE metric used by researchers to evaluate technologies does not address this issue. This paper outlines the issues relevant to wind turbine reliability for wind turbine power generation projects. The first sections describe the current state of the industry, identify the cost elements associated with wind farm O&M and availability and discuss the causes of uncertainty in estimating wind turbine component reliability. The latter sections discuss the means for reducing O&M costs and propose O&M related research and development efforts that could be pursued by the wind energy research community to reduce COE.

2004-11-01T23:59:59.000Z

432

Wind turbine reliability : understanding and minimizing wind turbine operation and maintenance costs.  

DOE Green Energy (OSTI)

Wind turbine system reliability is a critical factor in the success of a wind energy project. Poor reliability directly affects both the project's revenue stream through increased operation and maintenance (O&M) costs and reduced availability to generate power due to turbine downtime. Indirectly, the acceptance of wind-generated power by the financial and developer communities as a viable enterprise is influenced by the risk associated with the capital equipment reliability; increased risk, or at least the perception of increased risk, is generally accompanied by increased financing fees or interest rates. Cost of energy (COE) is a key project evaluation metric, both in commercial applications and in the U.S. federal wind energy program. To reflect this commercial reality, the wind energy research community has adopted COE as a decision-making and technology evaluation metric. The COE metric accounts for the effects of reliability through levelized replacement cost and unscheduled maintenance cost parameters. However, unlike the other cost contributors, such as initial capital investment and scheduled maintenance and operating expenses, costs associated with component failures are necessarily speculative. They are based on assumptions about the reliability of components that in many cases have not been operated for a complete life cycle. Due to the logistical and practical difficulty of replacing major components in a wind turbine, unanticipated failures (especially serial failures) can have a large impact on the economics of a project. The uncertainty associated with long-term component reliability has direct bearing on the confidence level associated with COE projections. In addition, wind turbine technology is evolving. New materials and designs are being incorporated in contemporary wind turbines with the ultimate goal of reducing weight, controlling loads, and improving energy capture. While the goal of these innovations is reduction in the COE, there is a potential impact on reliability whenever new technologies are introduced. While some of these innovations may ultimately improve reliability, in the short term, the technology risks and the perception of risk will increase. The COE metric used by researchers to evaluate technologies does not address this issue. This paper outlines the issues relevant to wind turbine reliability for wind turbine power generation projects. The first sections describe the current state of the industry, identify the cost elements associated with wind farm O&M and availability and discuss the causes of uncertainty in estimating wind turbine component reliability. The latter sections discuss the means for reducing O&M costs and propose O&M related research and development efforts that could be pursued by the wind energy research community to reduce COE.

Not Available

2004-11-01T23:59:59.000Z

433

Long-Term Surveillance  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Long-Term Surveillance Long-Term Surveillance Operations and Maintenance Fiscal Year 2013 Year-End Summary Report September 2013 LMS/ESL/S10692 ESL-RPT-2013-03 This page intentionally left blank LMS/ESL/S10692 ESL-RPT-2013-03 Long-Term Surveillance Operations and Maintenance Fiscal Year 2013 Year-End Summary Report September 2013 This page intentionally left blank U.S. Department of Energy Long-Term Surveillance Operations and Maintenance FY 2013 Year-End Summary Report September 2013 Doc. No. S10692 Page i Contents Abbreviations .................................................................................................................................. ii 1.0 Introduction ............................................................................................................................1

434

Reliability estimation for multiunit nuclear and fossil-fired industrial energy systems  

SciTech Connect

The purpose of this paper is twofold: to report industrial experience with process energy system reliability, and to assess the reliability of multiunit nuclear and fossil-fired energy systems in an industrial setting. Reliability here refers to the percentage of clock time that sufficient amounts of steam energy were available to permit desired production quotas to be met at a particular plant. A nationwide survey was conducted to obtain data relative to energy system reliabilities during 1973--74, and these data for 29 plants from chemicals and allied products (S.I.C. 28), petroleum refining and related industries (S.I.C. 29) and primary metals industries (S.I.C. 33) are reported here. A simulation model in which various operating characteristics of the energy systems were taken into account was developed to obtain estimates of reliabilities of proposed multiunit nuclear and fossil-fired systems. Based on several example problems evaluated with the simulation model, study results indicated that multiple nuclear units or a combination of nuclear and fossil-fired units could provide adequate reliability to meet large-scale industrial requirements for continuity of service.

Sullivan, W.G.; Wilson, J.V.; Klepper, O.H.

1978-01-01T23:59:59.000Z

435

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

E-Print Network (OSTI)

PV) technologies. PV reliability and degradation tests help9 1.5. Degradation and Reliability of PV1.5. Degradation and Reliability of PV materials Reliability

Bezryadina, Anna Sergeyevna

2012-01-01T23:59:59.000Z

436

North American Electric Reliability Council Outage Announcement |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Council Outage Announcement Council Outage Announcement North American Electric Reliability Council Outage Announcement Starting at about 4:11 p.m. EDT, major losses of electric load occurred in the northeastern United States and Canada in the Eastern Interconnection. Although the exact cause is not known at present, the outages are not the result of a terrorist attack. The areas most affected center around the Great Lakes: Michigan, Ohio, New York City, Ontario, Quebec, northern New Jersey, Massachusetts, and Connecticut. North American Electric Reliability Council Outage Announcement More Documents & Publications Blackout 2003: Final Report on the August 14, 2003 Blackout in the United States and Canada: Causes and Recommendations Blackout 2003: Blackout Final Implementation Report

437

Office of Electricity Delivery and Energy Reliability  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Comments of Cisco Systems to Comments of Cisco Systems to Office of Electricity Delivery and Energy Reliability Department of Energy in Response to Request for Information: Addressing Policy and Logistical Challenges to Smart Grid Implementation Issued September 13, 2010 FR Doc. 2010-23251 November 30, 2010 Cisco Systems provides these Comments in response to the Request for Information ("RFI") issued by the Office of Electricity Delivery and Energy Reliability of the Department of Energy ("DOE") on September 13, 2010. The RFI seeks information across a broad range of topics, but also requests that commenters be "concise," and provide "facts and concrete recommendations that can augment the general knowledge." 1 1. Interoperability Standards and the Smart Grid

438

Office of Electricity Delivery and Energy Reliability  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Subtopic c. References: Subtopic c. References: 1. Thomas B. Johansson, Henry Kelly, Amulya K.N. Reddy, and Robert H. Williams, "Renewable Energy: Sources for Fuels and Electricity", Island Press, 1993 2. Patrick Takahashi and Andrew Trenka, "Ocean Thermal Energy Conversion", John Wiley & sons, 1996. *All references can be accessed at: http://archive.epri.com/oceanenergy/streamenergy.html#reports OFFICE OF ELECTRICITY DELIVERY AND ENERGY RELIABILITY 28. NATURAL DISASTER REDUCTION THROUGH TECHNOLOGY The U.S. electric power sector is a critical part of our society. Virtually all aspects of residential, industrial, and commercial activities depend on safe, reliable, and affordable electricity. Electricity is among the most infrastructure-intensive segments of the energy sector - the electricity grid includes a network of 5,000 power

439

Bridging Resilience Engineering and Human Reliability Analysis  

SciTech Connect

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

Ronald L. Boring

2010-06-01T23:59:59.000Z

440

Quantifying reliability uncertainty : a proof of concept.  

SciTech Connect

This paper develops Classical and Bayesian methods for quantifying the uncertainty in reliability for a system of mixed series and parallel components for which both go/no-go and variables data are available. Classical methods focus on uncertainty due to sampling error. Bayesian methods can explore both sampling error and other knowledge-based uncertainties. To date, the reliability community has focused on qualitative statements about uncertainty because there was no consensus on how to quantify them. This paper provides a proof of concept that workable, meaningful quantification methods can be constructed. In addition, the application of the methods demonstrated that the results from the two fundamentally different approaches can be quite comparable. In both approaches, results are sensitive to the details of how one handles components for which no failures have been seen in relatively few tests.

Diegert, Kathleen V.; Dvorack, Michael A.; Ringland, James T.; Mundt, Michael Joseph; Huzurbazar, Aparna (Los Alamos National Laboratory, Los Alamos, NM); Lorio, John F.; Fatherley, Quinn (Los Alamos National Laboratory, Los Alamos, NM); Anderson-Cook, Christine (Los Alamos National Laboratory, Los Alamos, NM); Wilson, Alyson G. (Los Alamos National Laboratory, Los Alamos, NM); Zurn, Rena M.

2009-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Partially stabilized zirconia piston bowl reliability  

SciTech Connect

The Weibull based ''Simplified Structural Ceramic Design Technique'' was used to calculate the reliability of a partially stabilized zirconia (PSZ) piston bowl design. The details of the method and a set of sample calculations are presented. Test results of the piston bowl showed cracks in regions which had a high calculated probability of failure. In addition cracks developed in a region of high compressive/shear stress. Since Weibull reliability analysis only uses tensile stresses this area did not have a high calculated probability of failure. Several hypotheses are presented for the mode of failure in this region. The simplified technique was used to predict what the necessary material properties would have to be for successful PSZ insert of the design shown.

Hartsock, D.L.

1987-10-01T23:59:59.000Z

442

Reliability Estimation for Double Containment Piping  

Science Conference Proceedings (OSTI)

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.

L. Cadwallader; T. Pinna

2012-08-01T23:59:59.000Z

443

Reliability and the Federal Energy Regulatory Commission  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and the Federal Reliability and the Federal and the Federal Reliability and the Federal Energy Regulatory Energy Regulatory Commission Commission Michael Peters Michael Peters Energy Infrastructure & Cyber Security Advisor Energy Infrastructure & Cyber Security Advisor Federal Energy Regulatory Commission Federal Energy Regulatory Commission 202 202 - - 502 502 - - 8461 8461 Michael.Peters@FERC.GOV Michael.Peters@FERC.GOV The views expressed in this The views expressed in this presentation do not represent the presentation do not represent the views of the Federal Energy views of the Federal Energy Regulatory Commission or the United Regulatory Commission or the United States. States. These views are the personal opinion These views are the personal opinion of Mike Peters!!!! of Mike Peters!!!! ☺ ☺ ☺ ☺ ☺ ☺

444

EPRI Power Switching Safety and Reliability Project  

Science Conference Proceedings (OSTI)

The EPRI Switching Safety and Reliability (SS&R) Project features 24 completed studies to date in seven broad subject areas: 1) switching process, 2) tools and technological aids used in the planning and execution of switching, 3) switching errors, 4) incident analysis and investigation, 5) management methods and processes, 6) training, and 7) definitions and terminology. This report presents the history and accomplishments of the SS&R project as well as the extent of penetration of its findings into uti...

2008-12-16T23:59:59.000Z

445

Home Area Network Performance and Reliability  

Science Conference Proceedings (OSTI)

In current deployments, the in-meter communications interface between a utilitys advanced metering infrastructure (AMI) system and a consumers home area network (HAN) could be a critical link for the implementation of retail energy services. The reliability of communications across this interface will affect the overall customer experience and may impact the value of these services. This report examines technologies currently being used in North America and elsewhere to implement that link narrowband and...

2010-12-31T23:59:59.000Z

446

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

SciTech Connect

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.

Ronald Laurids Boring

2010-11-01T23:59:59.000Z

447

On the internet grouping for reliable multicasting  

E-Print Network (OSTI)

Current implementation of multicasting is using UDP protocol which is unreliable. There are many problems in reliable multicasting that make it difficult to implement. A study of the problems of reliable multicasting and an algorithm for reliable multicast protocol are proposed in this thesis. Unfairness when some of the receivers are faster than the others, the overhead at the sender because of managing all the group members and the problem of the traffic congestion at the sender because of the acknowledgments from each receiver are the problems that our proposed algorithm solved. Our proposed protocol is to divide the multicast group into different subgroups in a way that all members of the subgroup are related in speeds, location etc. In this way, we will make the sender send the same message with different speeds to different receiver subgroups. The sender will send as many times as the number of the subgroups. This solution has the advantage that fast receivers will not wait for slow receivers until they receive their message, which will improve the performance of fast receivers. To reduce the number of acknowledgments at the sender, we select from each subgroup a member that sends acknowledgment to the sender. In this way, only one acknowledgment from the subgroup is sent to the receiver rather than every member sending an acknowledgment to the sender, which solves the problem of many acknowledgments at the sender.

Ghanem, Mohamed M.

1996-01-01T23:59:59.000Z

448

Northeast United States U.S. Department of Energy Office of Electricity Delivery and Energy Reliability  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Assessment of the Adequacy of Assessment of the Adequacy of Natural Gas Pipeline Capacity in the Northeast United States U.S. Department of Energy Office of Electricity Delivery and Energy Reliability Energy Infrastructure Modeling and Analysis Division November 2013 Northeast U.S. Natural Gas Pipeline Adequacy Assessment, 2013 2 Preface In 2005-06, the U.S. DOE Office of Electricity Delivery and Energy Reliability (OE) conducted a study on the adequacy of interstate natural gas pipeline capacity serving the northeastern United States to meet natural gas demand in the event of a pipeline disruption. The study modeled gas demand for select market areas in the Northeast under a range of different weather conditions. The study then determined how interstate pipeline flow patterns could

449

Forecasting future economic growth : the term structure of interest rates, volatility and inflation as leading indicators  

E-Print Network (OSTI)

The broad literature documents the empirical regularity that slope of the term structure of interest rates is a reliable predictor of future real economic activity. Steeper slopes presage increasing growth, and downward ...

Khait, Maria

2012-01-01T23:59:59.000Z

450

Potential long-term chemical effects of diesel fuel emissions on a mining environment: A preliminary assessment based on data from a deep subsurface tunnel at Rainer Mesa, Nevada test site  

SciTech Connect

The general purpose of the Yucca Mountain Site Characterization Project (YMSCP) Introduced Materials Task is to understand and predict potential long-term modifications of natural water chemistry related to the construction and operation of a radioactive waste repository that may significantly affect performance of the waste packages. The present study focuses on diesel exhaust. Although chemical information on diesel exhaust exists in the literature, it is either not explicit or incomplete, and none of it establishes mechanisms that might be used to predict long-term behavior. In addition, the data regarding microbially mediated chemical reactions are not well correlated with the abiotic chemical data. To obtain some of the required long-term information, we chose a historical analog: the U12n tunnel at Rainier Mesa, Nevada Test Site. This choice was based on the tunnel`s extended (30-year) history of diesel usage, its geological similarity to Yucca Mountain, and its availability. The sample site within the tunnel was chosen based on visual inspection and on information gathered from miners who were present during tunnel operations. The thick layer of dark deposit at that site was assumed to consist primarily of rock powder and diesel exhaust. Surface samples and core samples were collected with an intent to analyze the deposit and to measure potential migration of chemical components into the rock. X-ray diffraction (XRD), x-ray fluorescence (XRF), scanning electron microscopy (SEM) with energy dispersive spectra (EDS) analysis, secondary-ion mass spectrometry (SIMS), and Fourier transform infrared (FTIR) analysis were used to measure both spatial distribution and concentration for the wide variety of chemical components that were expected based on our literature survey.

Meike, A.; Bourcier, W.L.; Alai, M. [and others

1995-09-01T23:59:59.000Z

451

Improved Measurements Could Mean Safer, More Reliable ...  

Science Conference Proceedings (OSTI)

... a person by delivering a high-voltage, low-current electric shock - have ... a standard method for accurately assessing the electrical output of ...

2011-04-26T23:59:59.000Z

452

Enhancements to ANNSTLF, EPRI's Short Term Load Forecaster  

Science Conference Proceedings (OSTI)

Reliable hourly load forecasts are important to electric utilities, power marketers, energy service providers, and independent system operators. To meet this need, EPRI's Artificial Neural Net Short Term Load Forecaster (ANNSTLF), which is already implemented at more than thirty-five utilities, was recently enhanced for greater accuracy and user friendliness.

1997-12-08T23:59:59.000Z

453

Washington DC Reliability Requirements and the Need to Operate Mirant's  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Washington DC Reliability Requirements and the Need to Operate Washington DC Reliability Requirements and the Need to Operate Mirant's Potomac River Generation Station to Support Local Area Reliability (Oak Ridge National Laboratory 2005) Washington DC Reliability Requirements and the Need to Operate Mirant's Potomac River Generation Station to Support Local Area Reliability (Oak Ridge National Laboratory 2005) Pursuant to Docket No. EO-05-01: Oak Ridge National Laboratory provided an analysis of the Mirant Potomac River Generation Station in 2005 and discussed the reliability requirements of the local area and the potential impacts on reliability of changing operation of the Potomac River Generating Station in this paper. Washington DC Reliability Requirements and the Need to Operate Mirant's Potomac River Generation Station to Support Local Area Reliability.pdf

454

Irregular term courses (These do not roll to future terms) Irregular term courses are allowed only in fall and spring terms. Irregular term courses  

E-Print Network (OSTI)

Irregular term courses (These do not roll to future terms) · Irregular term courses are allowed only in fall and spring terms. Irregular term courses in spring term cannot roll into summer term(s), no exceptions. · A course ending one day or more beyond the last final exam day for the fall term is considered

Bolding, M. Chad

455

Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Fuel  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Fuel Services Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Fuel Services GNEP would build and strengthen a reliable international fuel services consortium under which "fuel supplier nations" would choose to operate both nuclear power plants and fuel production and handling facilities, providing reliable fuel services to "user nations" that choose to only operate nuclear power plants. This international consortium is a critical component of the GNEP initiative to build an improved, more proliferation-resistant nuclear fuel cycle that recycles used fuel, while Global Nuclear Energy Partnership Fact Sheet - Establish Reliable Fuel Services More Documents & Publications

456

College of Electricity Delivery and Energy Reliability | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electricity Delivery and Energy Reliability Electricity Delivery and Energy Reliability College of Electricity Delivery and Energy Reliability College of Electricity Delivery and Energy Reliability Vision OE recognizes that our Nation's sustained economic prosperity, quality of life, and global competitiveness depend on access to an abundance of secure, reliable, and affordable energy resources. Through a mix of technology and policy solutions, we will address the changing dynamics and uncertainties in which the electric system will operate. We will leverage effective partnerships, solid research, and best practices to address diverse interests in achieving economic, societal, and environmental objectives. Resources Explore the following topics at OE's College of Electricity Delivery and Energy Reliability:

457

NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary Disturbance Report  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary Disturbance Report NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary Disturbance Report The following information represents a partial sequence of events based upon Reliability Coordinator information available to NERC. It is not clear if these events caused the event or were a consequence of other events. NERC is establishing teams to study the event and will coordinate with FERC, DOE, the industry and others. NORTH AMERICAN ELECTRIC RELIABILITY COUNCIL: Preliminary Disturbance Report More Documents & Publications North American Electric Reliability Council Power Outage Update Blackout 2003: Final Report on the August 14, 2003 Blackout in the United States and Canada: Causes and Recommendations

458

Library Terms That Users Understand  

E-Print Network (OSTI)

data resources about Library Terms That Users Understand ©terminology is a major factor. Terms most often cited asHumanities    or Social Sciences Terms most often cited as

Kupersmith, John

2012-01-01T23:59:59.000Z

459

Cornman's definition of observation terms  

Science Conference Proceedings (OSTI)

reconcile what is described in mentalistic terms with materialism. ... It is clearly important that the observation terms should not include terms which are ...

460

Assessment, development, and testing of glass for blast environments.  

SciTech Connect

Glass can have lethal effects including fatalities and injuries when it breaks and then flies through the air under blast loading (''the glass problem''). One goal of this program was to assess the glass problem and solutions being pursued to mitigate it. One solution to the problem is the development of new glass technology that allows the strength and fragmentation to be controlled or selected depending on the blast performance specifications. For example the glass could be weak and fail, or it could be strong and survive, but it must perform reliably. Also, once it fails it should produce fragments of a controlled size. Under certain circumstances it may be beneficial to have very small fragments, in others it may be beneficial to have large fragments that stay together. The second goal of this program was to evaluate the performance (strength, reliability, and fragmentation) of Engineered Stress Profile (ESP) glass under different loading conditions. These included pseudo-static strength and pressure tests and free-field blast tests. The ultimate goal was to provide engineers and architects with a glass whose behavior under blast loading is less lethal. A near-term benefit is a new approach for improving the reliability of glass and modifying its fracture behavior.

Glass, Sarah Jill

2003-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "term reliability assessment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

EPRI Power Switching Safety and Reliability Project  

Science Conference Proceedings (OSTI)

This report presents brief descriptions of the publications of the EPRI Switching Safety and Reliability (SS&R) Project and of the presentations at the annual EPRI SS&R Conferences from 1996 (the year of the projects inception) until 2010. The SS&R Project was initiated in 1996. Its purpose was to analyze switching errors and related incidents and to determine effective ways of limiting their occurrence. At the 1997 EPRI SS&R Conference, it became clear to EPRI and to the participants that there was a ne...

2011-04-12T23:59:59.000Z

462

Fuel Reliability Program: Proposed RIA Acceptance Criteria  

Science Conference Proceedings (OSTI)

The NRC is in the process of finalizing the interim RIA failure criteria published in NUREG-0800, Standard Review Plan, Section 4.2, Fuel System Design, Revision 3. A technical evaluation of the RIA issue has been conducted under the auspices of the EPRI Fuel Reliability Program with the objective of proposing a final version of the interim RIA failure criteria for PCMI processes. The approach used in the technical evaluation combined experimental data from a variety of sources, including integral RIA-si...

2010-12-23T23:59:59.000Z

463

Safety and reliability in superconducting MHD magnets  

DOE Green Energy (OSTI)

This compilation adapts studies on safety and reliability in fusion magnets to similar problems in superconducting MHD magnets. MHD base load magnet requirements have been identified from recent Francis Bitter National Laboratory reports and that of other contracts. Information relevant to this subject in recent base load magnet design reports for AVCO - Everett Research Laboratories and Magnetic Corporation of America is included together with some viewpoints from a BNL workshop on structural analysis needed for superconducting coils in magnetic fusion energy. A summary of design codes used in large bubble chamber magnet design is also included.

Laverick, C.; Powell, J.; Hsieh, S.; Reich, M.; Botts, T.; Prodell, A.

1979-07-01T23:59:59.000Z

464

Availability and Reliability Issues for ILC  

SciTech Connect

The International Linear Collider (ILC) will be the largest most complicated accelerator ever built. For this reason extensive work is being done early in the design phase to ensure that it will be reliable enough. This includes gathering failure mode data from existing accelerators and simulating the failures and repair times of the ILC. This simulation has been written in a general fashion using MATLAB and could be used for other accelerators. Results from the simulation tool have been used in making some of the major ILC design decisions and an unavailability budget has been developed.

Himel, T.; Nelson, J.; Phinney, N.; /SLAC; Ross, M.; /Fermilab

2007-06-27T23:59:59.000Z

465

Flu Terms Defined  

NLE Websites -- All DOE Office Websites (Extended Search)

Flu Terms Defined H1N1 Influenza is a respiratory disease of pigs caused by type A influenza viruses that causes regular outbreaks in pigs. People do not normally get H1N1 flu, but...

466

Terms and Conditions  

NLE Websites -- All DOE Office Websites (Extended Search)

Terms and Conditions Terms and Conditions R&D Overview 100G Testbed Testbed Description Testbed Results Current Testbed Research Proposal Process Terms and Conditions Virtual Circuits (OSCARS) Performance (perfSONAR) Tools Development Green Networking Authentication & Trust Federation (ATF) Partnerships Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net Terms and Conditions Researchers must provide ESnet copies of any articles, presentations, and publications based on testbed research for posting on the ESnet Testbed web site. All publications based on work conducted on the testbed must include the following statement:

467

An Examination of Temporal Trends in Electricity Reliability Based on Reports from U.S. Electric Utilities  

SciTech Connect

Since the 1960s, the U.S. electric power system has experienced a major blackout about once every 10 years. Each has been a vivid reminder of the importance society places on the continuous availability of electricity and has led to calls for changes to enhance reliability. At the root of these calls are judgments about what reliability is worth and how much should be paid to ensure it. In principle, comprehensive information on the actual reliability of the electric power system and on how proposed changes would affect reliability ought to help inform these judgments. Yet, comprehensive, national-scale information on the reliability of the U.S. electric power system is lacking. This report helps to address this information gap by assessing trends in U.S. electricity reliability based on information reported by electric utilities on power interruptions experienced by their customers. Our research augments prior investigations, which focused only on power interruptions originating in the bulk power system, by considering interruptions originating both from the bulk power system and from within local distribution systems. Our research also accounts for differences among utility reliability reporting practices by employing statistical techniques that remove the influence of these differences on the trends that we identify. The research analyzes up to 10 years of electricity reliability information collected from 155 U.S. electric utilities, which together account for roughly 50% of total U.S. electricity sales. The questions analyzed include: 1. Are there trends in reported electricity reliability over time? 2. How are trends in reported electricity reliability affected by the installation or upgrade of an automated outage management system? 3. How are trends in reported electricity reliability affected by the use of IEEE Standard 1366-2003?

Eto, Joseph H.; LaCommare, Kristina Hamachi; Larsen, Peter; Todd, Annika; Fisher, Emily

2012-01-06T23:59:59.000Z

468

Physics-Based Stress Corrosion Cracking Component Reliability Model cast in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Physics-Based Stress Corrosion Cracking Component Reliability Model Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework The Risk-Informed Safety Margin Characterization (RISMC) pathway is a set of activities defined under the U.S. Department of Energy Light Water Reactor Sustainability Program. The overarching objective of RISMC is to support plant life-extension decision-making by providing a state-of-knowledge characterization of safety margins in key systems, structures, and components (SSCs). The methodology emerging from the RISMC pathway is not a conventional probabilistic risk assessment (PRA)-based one; rather, it relies on a reactor systems simulation framework in which

469

Physics-Based Stress Corrosion Cracking Component Reliability Model cast in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Physics-Based Stress Corrosion Cracking Component Reliability Model Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework The Risk-Informed Safety Margin Characterization (RISMC) pathway is a set of activities defined under the U.S. Department of Energy Light Water Reactor Sustainability Program. The overarching objective of RISMC is to support plant life-extension decision-making by providing a state-of-knowledge characterization of safety margins in key systems, structures, and components (SSCs). The methodology emerging from the RISMC pathway is not a conventional probabilistic risk assessment (PRA)-based one; rather, it relies on a reactor systems simulation framework in which

470

The future of components for high reliability military and space applications  

Science Conference Proceedings (OSTI)

Military specified, ceramic packaged and radiation hardened components will disappear before the end of the century. The only long-term sustainable alternative may well be to use plastic packaged Commercial Components. The material in this report comes from the Defense Logistics Agency sponsored Plastic Package Availability Program and from an AT and T field reliability study. It summarizes Case Studies from companies which have been building and fielding highly reliable commercial and DOD military systems using plastic commercial components. Findings are, that when properly selected commercial components are operated within the true limitations of their design and packaging, they are as reliable as today`s Mil Spec components. Further, they offer cost, space and weight savings, shared manufacturing and field test experience with industry, and access to the most modern technology. Also reported are potential problems that may be encountered when using commercial components, their long term storage and use reliability characteristics, recommended design processes and supplier selection practices, commercial best business practices, and a semiconductor manufacturer`s view of the military`s switch to commercial plastic microcircuits.

Hanlon, J.T. [Sandia National Labs., Albuquerque, NM (United States). Component Information and Management Dept.

1996-02-01T23:59:59.000Z

471

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

E-Print Network (OSTI)

Renewable sources of energy such as wind turbine generators and solar panels have attracted much attention because they are environmentally friendly, do not consume fossil fuels, and can enhance a nation’s energy security. As a result, recently more significant amounts of renewable energy are being integrated into conventional power grids. The research reported in this dissertation primarily investigates the reliability-constrained planning and operations of electric power systems including renewable sources of energy by accounting for uncertainty. The major sources of uncertainty in these systems include equipment failures and stochastic variations in time-dependent power sources. Different energy sources have different characteristics in terms of cost, power dispatchability, and environmental impact. For instance, the intermittency of some renewable energy sources may compromise the system reliability when they are integrated into the traditional power grids. Thus, multiple issues should be considered in grid interconnection, including system cost, reliability, and pollutant emissions. Furthermore, due to the high complexity and high nonlinearity of such non-traditional power systems with multiple energy sources, computational intelligence based optimization methods are used to resolve several important and challenging problems in their operations and planning. Meanwhile, probabilistic methods are used for reliability evaluation in these reliability-constrained planning and design. The major problems 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 of distributed generators and protective devices in power distribution systems, and reliability-based estimation of wind power capacity credit. These case studies have demonstrated the viability and effectiveness of computational intelligence based methods in dealing with a set of important problems in this research arena.

Wang, Lingfeng

2008-12-01T23:59:59.000Z

472

OSIRIS and SOMBRERO Inertial Fusion Power Plant Designs, Volume 2: Designs, Assessments, and Comparisons  

Science Conference Proceedings (OSTI)

This is a comprehensive design study of two Inertial Fusion Energy (IFE) electric power plants. Conceptual designs are presented for a fusion reactor (called Osiris) using an induction-linac heavy-ion beam driver, and another (called SOMBRERO) using a KrF laser driver. The designs covered all aspects of IFE power plants, including the chambers, heat transport and power conversion systems, balance-of-plant facilities, target fabrication, target injection and tracking, as well as the heavy-ion and KrF drivers. The point designs were assessed and compared in terms of their environmental & safety aspects, reliability and availability, economics, and technology development needs.

Meier, W. R.; Bieri, R. L.; Monsler, M. J.; Hendricks, C. D.; Laybourne, P.; Shillito, K. R.

1992-03-01T23:59:59.000Z

473

Revisiting a soft-state approach to managing reliable transport connections  

E-Print Network (OSTI)

Abstract—We revisit the problem of connection management for reliable transport as part of our clean-slate Recursive Inter-Net Architecture (RINA) [5]. At one extreme, a pure soft-state (SS) approach (as in Delta-t [15]) safely removes the state of a connection at the sender and receiver once the state timers expire without the need for explicit removal messages. And new connections are established without an explicit handshaking phase. On the other hand, a hybrid hard-state/soft-state (HS+SS) approach (as in TCP) uses both explicit handshaking as well as more limited timer-based management of the connection’s state. In this paper, we consider the worst-case scenario of reliable single-message communication. Using simulation, we evaluate various approaches in terms of correctness (with respect to data loss and duplication) and robustness to bad network conditions (high message loss rate and variable channel delays). Our results show that the SS approach is more robust, and has lower message overhead and higher goodput. Thus, SS presents the best choice for reliable applications, especially those operating over bandwidth-constrained, error-prone networks. This result also suggests that within a clean-slate transport architecture, explicit connection messages for data reliability are not needed, and so a simple common packet interface based on Delta-t—rather than TCP vs. T/TCP vs. UDP, etc. — can be provided to support both transactional and bulk, reliable and unreliable (unacknowledged) applications. I.

Gonca Gursun; Ibrahim Matta; Karim Mattar

2010-01-01T23:59:59.000Z

474

Architecture for Interlock Systems Reliability Analysis with Regard to Safety and Availability  

E-Print Network (OSTI)

In the design of interlock loops for the signal exchange in machine protection systems, the choice of the hardware architecture impacts on machine safety and availability. The reliable performance of a machine stop (leaving the machine in a safe state) in case of an emergency, is an inherent requirement. The constraints in terms of machine availability on the other hand may differ from one facility to another. Spurious machine stops, lowering machine availability, may to a certain extent be tolerated in facilities where they do not cause undue equipment wearout. In order to compare various interlock loop architectures in terms of safety and availability, the occurrence frequencies of related scenarios have been calculated in a reliability analysis, using a generic analytical model. This paper presents the results and illustrates the potential of the analysis method for supporting the choice of interlock system architectures.

Wagner, S; Schmidt, R; Zerlauth, M; Vergara-Fernandez, A

2011-01-01T23:59:59.000Z

475

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

E-Print Network (OSTI)

and Energy Reliability, Distribution System IntegrationEnergy Reliability, Renewable and Distributed Systems Integration

Marnay, Chris

2009-01-01T23:59:59.000Z

476

Formal lifetime reliability analysis using continuous random variables  

Science Conference Proceedings (OSTI)

Reliability has always been an important concern in the design of engineering systems. Recently proposed formal reliability analysis techniques have been able to overcome the accuracy limitations of traditional simulation based techniques but can only ...

Naeem Abbasi; Osman Hasan; Sofiène Tahar

2010-07-01T23:59:59.000Z

477

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

DOE Green Energy (OSTI)

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

Link, H.

2011-08-01T23:59:59.000Z

478

Using expert systems components to enhance reliability analysis tools  

Science Conference Proceedings (OSTI)

In this paper we discuss the use of expert system components to enhance reliability analysis software tools. The discussion focuses on two expert systems built to enhance STAR and SUPER, reliability analysis tools developed at AT&T Bell Laboratories. ...

William B. Frakes; D. H. Myers

1988-06-01T23:59:59.000Z

479

2013 Reliability & Markets Peer Review - Day 2 Presentations...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reliability R&D Reliability & Markets Peer Review included 6 sessions over 2 days on August 6 - 7, 2013. Presentations from Day 2 (Sessions V and VI) are available below....

480

New event-driven sampling techniques for network reliability estimation  

Science Conference Proceedings (OSTI)

Exactly computing network reliability measures is an NP-hard problem. Therefore, Monte Carlo simulation has been frequently used by network designers to obtain accurate estimates. This paper focuses on simulation estimation of network reliability. Using ...

Abdullah Konak; Alice E. Smith; Sadan Kulturel-Konak

2004-12-01T23:59:59.000Z

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481

Designing CPV Receivers With Reliability: Early Evaluation of Components  

E-Print Network (OSTI)

Designing CPV Receivers With Reliability: Early Evaluation of Components Objective Materials from power electronics industry must be proven when integrated in PV applications. Pre-qualification tests improves the receiver design and reliability. ANU microconcentrator test&design experience

482

Using wind plant data to increase reliability.  

DOE Green Energy (OSTI)

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.

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

2011-01-01T23:59:59.000Z

483

Durability and reliability of solar domestic hot water heaters: Survey results. Final report, Part 1  

SciTech Connect

An unresolved barrier for consumer acceptance of SDWH systems is the perception that they are unreliable and that their service life is significantly less than that claimed by the manufacturers/dealers. A comprehensive survey was developed to identify and define the relevant durability and reliability issues that affect the long term performance of SDWH systems. The survey was directed towards installers and service contractors with significant field experience.

Ramirez-Vargas, R.; Whitfield, K. [Arizona State Univ., Tempe, AZ (United States); Hicks, B.; Wood, B.D. [Univ. of Nevada, Reno, NV (United States)

1998-03-01T23:59:59.000Z

484

Real Time Grid Reliability Management 2005  

E-Print Network (OSTI)

Stability/Security Assessment and On-Line Control”, EPRIStability Analysis Program (VSTAB), Version 2.1, User’s Manual, EPRIStability Analysis Program (VSTAB)”, Version 2.1, User’s Manual, EPRI

Eto, Joe

2008-01-01T23:59:59.000Z

485

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

NLE Websites -- All DOE Office Websites

of Electricity Delivery & Energy Reliability Services Electricity Advisory Committee Technology Development Electricity Policy Coordination and Implementation DOE Grid Tech Team...

486

Reliability of Electric Utility Distribution Systems: EPRI White Paper  

Science Conference Proceedings (OSTI)

This report discusses what is known about electric power distribution system reliability and investigates whether there are generally available methods for performing reliability analysis for distribution systems. The theory of the reliability of general systems is well understood. A fundamental issue is whether an appropriate implementation of the theory exists in a form readily usable by distribution system planners and designers.

2000-10-17T23:59:59.000Z

487

Summary of Recommendations from NERC Reliability Readiness Evaluations  

Science Conference Proceedings (OSTI)

The North American Electric Reliability Corporation (NERC) has recently conducted a large number of reliability readiness evaluations at the sites of various transmission operators, balancing authorities, and reliability coordinators. This report summarizes the most prevalent recommendations in these evaluations, enabling entities not yet audited to better prepare by initiating improvements in emphasized recommendation areas.

2008-10-20T23:59:59.000Z

488