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Detailed Study Of Emergency Diesel Generator Performance Using Epix
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Book Synopsis Detailed Study of Emergency Diesel Generator Performance Using EPIX by :
Download or read book Detailed Study of Emergency Diesel Generator Performance Using EPIX written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 one hour, and fail to run beyond one hour. Data from the U.S. industry contained in the Equipment Performance and Information Exchange (EPIX) database maintained by The Institute for Nuclear Power Operations were used to evaluate the failure probabilities and rates for these failure modes, covering 1998 - 2002. The software package Reliability and Availability Database System (RADS) was used to search and process the EPIX data. In addition, train test and maintenance unavailability was characterized for 34 train types. As a follow-on effort to this report, several components will be analyzed in more detail each year. These detailed studies include more recent data and analyze various subcategories such as manufacturer, system, size and type (as applicable). In addition, engineering insights such as piece part contribution to each failure mode and failure cause will be determined. This paper summarizes the preliminary results for emergency diesel generators. EPIX data coverage was expanded to include 1998 - 2007 and reliability results were compared with unplanned demand performance (bus under voltage events requiring the emergency diesel generator to start, load and run) over the same period. In addition, performance by manufacturer was evaluated. Finally, piece part contributions and failure causes were determined for each failure mode.
Book Synopsis Enhanced Component Performance Study by :
Download or read book Enhanced Component Performance Study written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents an enhanced performance evaluation of emergency diesel generators (EDGs) at U.S. commercial nuclear power plants. This report evaluates component performance over time using Institute of Nuclear Power Operations (INPO) Consolidated Events Database (ICES) data from 1998 through 2013 and maintenance unavailability (UA) performance data using Mitigating Systems Performance Index (MSPI) Basis Document data from 2002 through 2013. The objective is to present an analysis of factors that could influence the system and component trends in addition to annual performance trends of failure rates and probabilities. The factors analyzed for the EDG component are the differences in failures between all demands and actual unplanned engineered safety feature (ESF) demands, differences among manufacturers, and differences among EDG ratings. Statistical analyses of these differences are performed and results showing whether pooling is acceptable across these factors. In addition, engineering analyses were performed with respect to time period and failure mode. The factors analyzed are: sub-component, failure cause, detection method, recovery, manufacturer, and EDG rating.
Book Synopsis Enhanced Component Performance Study by :
Download or read book Enhanced Component Performance Study written by and published by . This book was released on 2015 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents an enhanced performance evaluation of emergency diesel generators (EDGs) at U.S. commercial nuclear power plants. This report evaluates component performance over time using (1) Institute of Nuclear Power Operations (INPO) Consolidated Events Database (ICES) data from 1998 through 2014 and (2) maintenance unavailability (UA) performance data from Mitigating Systems Performance Index (MSPI) Basis Document data from 2002 through 2014. The objective is to show estimates of current failure probabilities and rates related to EDGs, trend these data on an annual basis, determine if the current data are consistent with the probability distributions currently recommended for use in NRC probabilistic risk assessments, show how the reliability data differ for different EDG manufacturers and for EDGs with different ratings; and summarize the subcomponents, causes, detection methods, and recovery associated with each EDG failure mode. Engineering analyses were performed with respect to time period and failure mode without regard to the actual number of EDGs at each plant. The factors analyzed are: sub-component, failure cause, detection method, recovery, manufacturer, and EDG rating. Six trends with varying degrees of statistical significance were identified in the data.
Book Synopsis A Review of Emergency Diesel Generator Performance at Nuclear Power Plants by : James Charles Higgins
Download or read book A Review of Emergency Diesel Generator Performance at Nuclear Power Plants written by James Charles Higgins and published by . This book was released on 1985 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Emergency Diesel Generators in Restoring Power to Their Associated Safety Buses by : Theodore C. Cintula
Download or read book Performance of Emergency Diesel Generators in Restoring Power to Their Associated Safety Buses written by Theodore C. Cintula and published by . This book was released on 1991 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Performance-monitoring to Improve Reliability of Emergency Diesel Generators by : Jeffrey Daniel Dulik
Download or read book Use of Performance-monitoring to Improve Reliability of Emergency Diesel Generators written by Jeffrey Daniel Dulik and published by . This book was released on 1998 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Risk-informed, Performance-based Regulatory Implications of Improved Emergency Diesel Generator Reliability by : Shantel Mistilynn Utton
Download or read book Risk-informed, Performance-based Regulatory Implications of Improved Emergency Diesel Generator Reliability written by Shantel Mistilynn Utton and published by . This book was released on 1998 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of an Emergency Diesel Generator Reliability Program, Project 3000-23 - a Case Study of Crystal River Unit 3 by : Inc ERIN Engineering and Research
Download or read book Investigation of an Emergency Diesel Generator Reliability Program, Project 3000-23 - a Case Study of Crystal River Unit 3 written by Inc ERIN Engineering and Research and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Evaluation Report Emergency Diesel Generator Technical Specifications Study Results by :
Download or read book Technical Evaluation Report Emergency Diesel Generator Technical Specifications Study Results written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to review technical specifications for emergency diesel generators in the context of new information developed in the Nuclear Plant Aging Research Program and the application of current NRC regulatory concepts and knowledge. Aging and reliability relationships related to the standard technical specifications are reviewed and supported by data and published information to ensure that conservative and beneficial specifications are identified. Where technical specifications could adversely influence aging and reliability, the technical issues and reasonable alternatives are identified for consideration. This report documents and spans the technical progress from the published and approved regulatory documents to the current knowledge basis. This ensures that the technical bases for the technical specifications discussed are documented and relatively complete subject information is contained in one document. The Pacific Northwest Laboratory (PNL) has participated in the Nuclear Plant Aging Research (NPAR) Program directed by the Nuclear Regulatory Commission's (NRC) Office of Nuclear Regulatory Research, Division of Engineering. The NPAR study of emergency diesel generator aging was performed in two phases. In Phase I, plant operating experience, ~ata, expert opinion and statistical methods were used to produce a new data base related to aging, reliability, and operational readiness of nuclear service diesel generators. Phase II was chiefly concerned with aging mitigation measures.
Download or read book Weekly Information Report written by and published by . This book was released on 1996-06-28 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of an Emergency Diesel Generator Reliability Program by : T. A. Morgan
Download or read book Investigation of an Emergency Diesel Generator Reliability Program written by T. A. Morgan and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On Monitoring Nuclear Power Plant Emergency Diesel Generator Reliability by :
Download or read book On Monitoring Nuclear Power Plant Emergency Diesel Generator Reliability written by and published by . This book was released on 1993 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: If offsite power is interrupted, the availability of onsite alternating current power supplies is a major factor in assuring acceptable safety at commercial light-water-cooled nuclear power plants. To control the risk of severe care damage during station blackout accidents at a given plant, the reliability of the emergency diesel generators (EDGS) to start and load-run upon demand must be maintained at a sufficiently high level. The minimum EDG reliability, which we denote by RT, is targeted at either 0.95 or 0.975 per nuclear unit consistent with the reliability level that the plant operator assumed in the coping analysis for station blackout. In 1992 the US Nuclear Regulatory Commission (NRC) considered an amendment that would require licensees to test and monitor EDG reliability against performance-based criteria that indicate possible degradation from the EDG target reliability levels. They originally proposed the following set of fixed sample-size triggers for use in monitoring EDG reliability. The purpose of this report is to compare the performance of the proposed triggers with corresponding alternative sequential variable sample-size triggers which potentially permit earlier detection of EDG reliability degradation without significantly increasing the false alarm rate. The comparison is to be done in a simulated use environment by means of Monte Carlo simulation. We are also interested in the inverse conditional probabilities of reliability degradation given that a trigger has occurred.
Book Synopsis Analyses of Reliability Characteristics of Emergency Diesel Generator Population Using Empirical Bayes Methods by :
Download or read book Analyses of Reliability Characteristics of Emergency Diesel Generator Population Using Empirical Bayes Methods written by and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emergency Diesel Generators (EDGs) provide backup power to nuclear power plants in case of failure of AC buses. The reliability of EDGs is important to assure response to loss-of-offsite power accident scenarios, a dominant contributor to the plant risk. The reliable performance of EDGs has been of concern both for regulators and plant operators. In this paper the authors present an approach and results from the analysis of failure data from a large population of EDGs. They used empirical Bayes approach to obtain both the population distribution and the individual failure probabilities from EDGs failure to start and load-run data over 4 years for 194 EDGs at 63 plant units.
Book Synopsis RELIABILITY STUDY: EMERGENCY DIESEL GENERATOR POWER SYSTEM, 1987-1993... NUREG by : U.S. Nuclear Regulatory Commission
Download or read book RELIABILITY STUDY: EMERGENCY DIESEL GENERATOR POWER SYSTEM, 1987-1993... NUREG written by U.S. Nuclear Regulatory Commission and published by . This book was released on 2000* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Emergency Diesel Generator Bearing Monitoring Using HFED Techniques by : Electric Power Research Institute
Download or read book Emergency Diesel Generator Bearing Monitoring Using HFED Techniques written by Electric Power Research Institute and published by . This book was released on 1996 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NUREG/CR. by : U.S. Nuclear Regulatory Commission
Download or read book NUREG/CR. written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1977 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Probabilistic Safety Assessment and Management by : Cornelia Spitzer
Download or read book Probabilistic Safety Assessment and Management written by Cornelia Spitzer and published by Springer. This book was released on 2014-01-04 with total page 3803 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of papers presented at the PSAM 7 – ESREL ’04 conference in June 2004, reflecting a wide variety of disciplines, such as principles and theory of reliability and risk analysis, systems modelling and simulation, consequence assessment, human and organisational factors, structural reliability methods, software reliability and safety, insights and lessons from risk studies and management/decision making. This volume covers both well-established practices and open issues in these fields, identifying areas where maturity has been reached and those where more development is needed.
