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Reliability of Electronics

Description: The purpose of this research is not to research new technology but how to improve existing technology and understand how the manufacturing process works. Reliability Engineering fall under the category of Quality Control and uses predictions through statistical measurements and life testing to figure out if a specific manufacturing technique will meet customer satisfaction. The research also answers choice of materials and choice of manufacturing process to provide a device that will not only m… more
Date: December 2014
Creator: Wickstrom, Larry E.
Partner: UNT Libraries
open access

Review of HRP Positions

Description: The Department of Energy (DOE) Human Reliability Program (HRP), published as 10 CFR Part 712, is currently being reviewed and revised to address concerns identified during its implementation. Although these ''page changes'' primarily incorporate clarification of terms and language, the following discussion relates to broadening the definition of positions that require HRP certification that is found in {section}712.10.
Date: January 1, 2007
Creator: Studies, Center for Reliability
Partner: UNT Libraries Government Documents Department
open access

Application of Entry-Time Processes in Asset Management for Nuclear Power Plants (Final Report)

Description: A mathematical model of entry-time processes was developed, and a computational method for solving that model was verified. This methodology was demonstrated via application to a succession of increasingly more complex subsystems of nuclear power plants. The effort culminated in the application to main generators that constituted the PhD dissertation of Shuwen (“Eric”) Wang. Dr. Wang is now employed by ABS Consulting, in Anaheim, CA. ABS is a principal provider to the nuclear industry of techni… more
Date: January 23, 2008
Creator: Nelson, Paul
Partner: UNT Libraries Government Documents Department
open access

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

Description: California is on a path to increase utilization of renewable resources. California will need to integrate approximately 30,000 megawatts (MW) of new renewable generation in the next 20 years. Renewable resources are typically located in remote locations, not near the load centers. Nearly two/thirds or 20,000 MW of new renewable resources needed are likely to be delivered to Los Angeles Basin transmission gateways. Integration of renewable resources requires interconnection to the power grid, ex… more
Date: July 1, 2008
Creator: Eto, Joseph; Budhraja, Vikram; Ballance, John; Dyer, Jim; Mobasheri, Fred & Eto, Joseph
Partner: UNT Libraries Government Documents Department

Gearbox Reliability Collaborative Update: A Brief

Description: 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) Demon… more
Date: January 1, 2012
Creator: Sheng, S.; Keller, J. & McDade, M.
Partner: UNT Libraries Government Documents Department
open access

Predicting the reliability of electronic circuits.

Description: Procedures to predict the reliability of electrical circuits are discussed. Three cases are introduced and discussed. In Case 1, an analyst predicts the probability of any failure in the intended relations between circuit inputs and circuit outputs. In Case 2, an analyst predicts the probability that specified unintended outputs would occur. In Case 3, an analyst considers coupling between circuits. Logic models are given for the three cases, and sources of failure probabilities of components a… more
Date: June 1, 2004
Creator: Loescher, Douglas H.
Partner: UNT Libraries Government Documents Department
open access

Failure Rate Data Analysis for High Technology Components

Description: Understanding component reliability helps designers create more robust future designs and supports efficient and cost-effective operations of existing machines. The accelerator community can leverage the commonality of its high-vacuum and high-power systems with those of the magnetic fusion community to gain access to a larger database of reliability data. Reliability studies performed under the auspices of the International Energy Agency are the result of an international working group, which … more
Date: July 1, 2007
Creator: Cadwallader, L. C.
Partner: UNT Libraries Government Documents Department
open access

Bridging Resilience Engineering and Human Reliability Analysis

Description: 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 analysi… more
Date: June 1, 2010
Creator: Boring, Ronald L.
Partner: UNT Libraries Government Documents Department
open access

Product acceptance environmental and destructive testing for reliability.

Description: To determine whether a component is meeting its reliability requirement during production, acceptance sampling is employed in which selected units coming off the production line are subjected to additional environmental and/or destructive tests that are within the normal environment space to which the component is expected to be exposed throughout its life in the Stockpile. This report describes what these tests are and how they are scored for reliability purposes. The roles of screens, Enginee… more
Date: August 1, 2007
Creator: Dvorack, Michael A.; Kerschen, Thomas J. & Collins, Elmer W.
Partner: UNT Libraries Government Documents Department
open access

Reliability Results of NERSC Systems

Description: In order to address the needs of future scientific applications for storing and accessing large amounts of data in an efficient way, one needs to understand the limitations of current technologies and how they may cause systeminstability or unavailability. A number of factors can impact system availability ranging from facility-wide power outage to a single point of failure such as network switches or global file systems. In addition, individual component failure in a system can degrade the per… more
Date: May 27, 2008
Creator: Petascale Data Storage Institute
Partner: UNT Libraries Government Documents Department
open access

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

Description: 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… more
Date: June 1, 2010
Creator: Boring, Ronald L.
Partner: UNT Libraries Government Documents Department
open access

Reliability Testing Beyond Qualification as a Key Component in Photovoltaic's Progress Toward Grid Parity: Preprint

Description: This paper discusses why it is necessary for new lower cost PV modules to be tested using a reliability test sequence that goes beyond the Qualification test sequence now utilized for modules. Today most PV modules are warranted for 25 years, but the Qualification Test Sequence does not test for 25-year life. There is no accepted test protocol to validate a 25-year lifetime. This paper recommends the use of long term accelerated testing to compare now designs directly with older designs that ha… more
Date: February 1, 2011
Creator: Wohlgemuth, J. H. & Kurtz, S.
Partner: UNT Libraries Government Documents Department
open access

Review of the Recent Frequency Performance of the Eastern, Western and ERCOT Interconnections

Description: The reliable operation of an electric power system depends on careful management of the balance between generation and load to ensure that system frequency is maintained within narrow bounds around a scheduled value. Yet, maintaining frequency at the scheduled value is challenging because the load served is continuously changing, and occasionally, events such as the sudden loss of a large generation plant or large amount of load, cause frequency to deviate abruptly. This report reviews the rece… more
Date: December 20, 2010
Creator: Lacommare, Kristina S H
Partner: UNT Libraries Government Documents Department
open access

Fifty Years of THERP and Human Reliability Analysis

Description: In 1962 at a Human Factors Society symposium, Alan Swain presented a paper introducing a Technique for Human Error Rate Prediction (THERP). This was followed in 1963 by a Sandia Laboratories monograph outlining basic human error quantification using THERP and, in 1964, by a special journal edition of Human Factors on quantification of human performance. Throughout the 1960s, Swain and his colleagues focused on collecting human performance data for the Sandia Human Error Rate Bank (SHERB), prima… more
Date: June 1, 2012
Creator: Boring, Ronald L.
Partner: UNT Libraries Government Documents Department
open access

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

Description: 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 s… more
Date: October 10, 2008
Creator: LaCommare, Kristina H. & Eto, Joseph H.
Partner: UNT Libraries Government Documents Department
open access

Structural Reliability of Ceramics at High Temperature: Mechanisms of Fracture and Fatigue Crack Growth

Description: Final report of our DOE funded research program. Aim of the research program was to provide a fundamental basis from which the mechanical reliability of layered structures may be understood, and to provide guidelines for the development of technologically relevant layered material structures with optimum resistance to fracture and subcritical debonding. Progress in the program to achieve these goals is described.
Date: August 1, 2005
Creator: Dauskardt, Reinhold H.
Partner: UNT Libraries Government Documents Department
open access

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

Description: Information on the value of reliable electricity service can be used to assess the economic efficiency of investments in generation, transmission and distribution systems, to strategically target investments to customer segments that receive the most benefit from system improvements, and to numerically quantify the risk associated with different operating, planning and investment strategies. This paper summarizes research designed to provide estimates of the value of service reliability for ele… more
Date: June 1, 2009
Creator: Sullivan, M.J.; Mercurio, Matthew & Schellenberg, Josh
Partner: UNT Libraries Government Documents Department
open access

Reliability Testing the Die-Attach of CPV Cell Assemblies

Description: Results and progress are reported for a course of work to establish an efficient reliability test for the die-attach of CPV cell assemblies. Test vehicle design consists of a ~1 cm2 multijunction cell attached to a substrate via several processes. A thermal cycling sequence is developed in a test-to-failure protocol. Methods of detecting a failed or failing joint are prerequisite for this work; therefore both in-situ and non-destructive methods, including infrared imaging techniques, are being … more
Date: February 1, 2011
Creator: Bosco, N.; Sweet, C. & Kurtz, S.
Partner: UNT Libraries Government Documents Department

Gearbox Reliability Collaborative Update

Description: Understand and isolate sources of gearbox failures; Improve understanding of internal loads and response; Normal operation and transients; Improve analysis tools to accurately simulate response; Improve ability to reproduce field response in dyno testing; Evaluate how CM augments design and O and M.
Date: April 1, 2012
Creator: Keller, J.; McDade, M.; LaCava, W.; Guo, Y. & Sheng, S.
Partner: UNT Libraries Government Documents Department
open access

Human Reliability Analysis for Small Modular Reactors

Description: 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 cur… more
Date: June 1, 2012
Creator: Boring, Ronald L. & Gertman, David I.
Partner: UNT Libraries Government Documents Department
open access

Uncertainty Quantification in the Reliability and Risk Assessment of Generation IV Reactors: Final Scientific/Technical Report

Description: The project entitled, “Uncertainty Quantification in the Reliability and Risk Assessment of Generation IV Reactors”, was conducted as a DOE NERI project collaboration between Texas A&M University and The Ohio State University between March 2006 and June 2009. The overall goal of the proposed project was to develop practical approaches and tools by which dynamic reliability and risk assessment techniques can be used to augment the uncertainty quantification process in probabilistic risk assessme… more
Date: September 10, 2009
Creator: Vierow, Karen & Aldemir, Tunc
Partner: UNT Libraries Government Documents Department
open access

Detailed Study of Emergency Diesel Generator Performance Using EPIX/RADS Database

Description: A recent report was published by the U.S. Nuclear Regulatory Commission – Industry-Average Performance for Components and Initiating Events at U.S. Commercial Nuclear Power Plants, NUREG/CR-6928. That report characterized industry performance (generally covering 1998 – 2002) for 51 component types found in commercial nuclear power plants. For example, for emergency diesel generators, three failure modes were identified: fail to start and reach rated speed and voltage, fail to load and run for o… more
Date: September 1, 2008
Creator: Eide, Steven; Wierman, Thomas & Rasmuson, Dale
Partner: UNT Libraries Government Documents Department
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