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Cycle 7 outage experience. [Fast Flux Test Facility (FFTF)]

Description: The scheduled 58-day refueling outage in preparation for the seventh operating cycle of the Fast Flux Test Facility (FFTF) was successfully completed three days ahead of schedule. The planning and execution of the outage was greatly aided by Project/2 automated scheduling capabilities. For example, the use of ''maintenance windows'' and resource loading capabilities was particularly effective. The value of the planning process was demonstrated by the smooth transition into the outage phase afte… more
Date: March 1, 1986
Creator: Gadeken, A.D.
Partner: UNT Libraries Government Documents Department
open access

Outages of electric power supply resulting from cable failures Boston Edison Company system

Description: Factual data are provided regarding 5 electric power supply interruptions that occurred in the Boston Metropolitan area during April to June, 1979. Common to all of these outages was the failure of an underground cable as the initiating event, followed by multiple equipment failures. There was significant variation in the voltage ratings and types of cables which failed. The investigation was unable to delineate a single specific Boston Edison design operating or maintenance practice that could… more
Date: July 1, 1980
Partner: UNT Libraries Government Documents Department
open access

Analysis of residential, industrial and commercial sector responses to potential electricity supply constraints in the 1990s

Description: There is considerable debate over the ability of electric generation capacity to meet the growing needs of the US economy in the 1990s. This study provides new perspective on that debate and examines the possibility of power outages resulting from electricity supply constraints. Previous studies have focused on electricity supply growth, demand growth, and on the linkages between electricity and economic growth. This study assumes the occurrence of electricity supply shortfalls in the 1990s and… more
Date: September 1, 1986
Creator: Fisher, Z. J.; Fang, J. M.; Lyke, A. J. & Krudener, J. R.
Partner: UNT Libraries Government Documents Department
open access

Analysis of nuclear power plant component failures

Description: Items are shown that have caused 90% of the nuclear unit outages and/or deratings between 1971 and 1980 and the magnitude of the problem indicated by an estimate of power replacement cost when the units are out of service or derated. The funding EPRI has provided on these specific items for R and D and technology transfer in the past and the funding planned in the future (1982 to 1986) are shown. EPRI's R and D may help the utilities on only a small part of their nuclear unit outage problems. F… more
Date: January 1, 1984
Partner: UNT Libraries Government Documents Department
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California Energy Commission Staff Paper. Issues Related to Reliability of Power Plants in California

Description: This paper reflects the concern that without reexamination on the part of the industry of its past policies, traditions, and practices, the power plants yet to be licensed in the State of California may not fulfill their full productivity potential. Also, this document seeks a recognition of all parties participating in the regulatory processes, that unless appropriate and deliberate measures are applied, the reliability of the future power generating facilities may be inconsistent with the ene… more
Date: December 1, 1979
Creator: Shurley, L. A.
Partner: UNT Libraries Government Documents Department
open access

Risk-Based Plant Performance Indicators

Description: Tasked by the 1979 President's Commission on the Accident at Three Mile Island, the US nuclear power industry has put into place a performance indicator program as one means for showing a demonstrable record of achievement.'' Largely through the efforts of the Institute of Nuclear Power Operations (INPO), plant performance data has, since 1983, been collected and analyzed to aid utility management in measuring their plants' performance progress. The US Nuclear Regulatory Commission (NRC) has al… more
Date: January 1, 1989
Creator: Boccio, J. L.; Azarm, M. A.; Vesely, W. E. & Hall, R. E.
Partner: UNT Libraries Government Documents Department
open access

Systems interaction study of a Westinghouse PWR

Description: This paper presents methods and findings of a systems interaction study of Indian Point 3. The study was carried out in support of the resolution of Unresolved Safety Issue A-17 on Systems Interactions. Fault tree methods were employed. Among the study's findings is a single active failure in the low pressure injection function; this discovery led to a plant modification. In addition to providing support to the staff in resolving USI A-17, the project discovered an important new class of failur… more
Date: January 1, 1985
Creator: Youngblood, R.; Hanan, N.; Fitzpatrick, R.; Xue, D.; Bozoki, G.; Fresco, A. et al.
Partner: UNT Libraries Government Documents Department
open access

Use of the Reference Energy System and EEMIS to analyze some cause-effect relationships

Description: The Energy Emergency Management Information System (EEMIS) and the Reference Energy System (RES) form an ideal framework for analyzing cause-effect relationships in the petroleum and natural gas energy systems. This report presents four case studies that demonstrate the applications of EEMIS and the RES for analyzing (1) the relationships between weather and the demand for energy in regions of the US, (2) the effect of a refinery outage on oil product distribution, (3) the impact of transportat… more
Date: November 1, 1979
Creator: D'Acierno, J & Hermelee, A
Partner: UNT Libraries Government Documents Department
open access

Probabilistic analysis of allowed outage times relaxation at a PWR plant

Description: Technical Specifications (TS) in a nuclear power plant are specific requirements on its day-to-day operation, designed to protect public health and safety. Two primary aspects of the TS are (1) limiting conditions of operation (LCO) with allowed outage times (AOTs) and (2) surveillance testing intervals (STIs). In recent years, there has been growing interest in the nuclear community in reexamining the TS. One of the reasons is that a significant portion of reactor downtime (plant unavailabilit… more
Date: January 1, 1986
Creator: Cho, N.; Chu, T.; Xue, D.; Bozoki, G. & Youngblood, R.
Partner: UNT Libraries Government Documents Department
open access

Strategies and criteria for risk-based configuration control

Description: A configuration, as used here, is a set of component operability or statuses that define the state of a nuclear power plant. Risk-based configuration control is the management of component configurations using a risk perspective to control risk and assure safety. If the component configurations that have high risk implications do not occur then the risk from the operation of nuclear power plants would be minimal. The control of component configurations, i.e., the management of component statuse… more
Date: January 1, 1991
Creator: Samanta, P.K.; Kim, I.S. (Brookhaven National Lab., Upton, NY (United States)) & Vesely, W.E. (Science Applications International Corp., San Diego, CA (United States))
Partner: UNT Libraries Government Documents Department
open access

Evaluation of allowed outage times (AOTs) from a risk and reliability standpoint

Description: This report describes the basic risks which are associated with allowed outage times (AOTs), defines strategies for selecting the risks to be quantified, and describes how the risks can be quantified. The report furthermore describes criteria considerations in determining the acceptability of calculated AOT risks, and discusses the merits of relative risk criteria versus absolute risk criteria. The detailed evaluations which are involved in calculating AOT risks, including uncertainty considera… more
Date: August 1, 1989
Creator: Vesely, W.E. (Science Applications International Corp., Columbus, OH (USA))
Partner: UNT Libraries Government Documents Department
open access

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

Description: 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 … more
Date: April 1, 1985
Creator: Hill, D.
Partner: UNT Libraries Government Documents Department
open access

Flooding Experiments and Modeling for Improved Reactor Safety

Description: Countercurrent two-phase flow and “flooding” phenomena in light water reactor systems are being investigated experimentally and analytically to improve reactor safety of current and future reactors. The aspects that will be better clarified are the effects of condensation and tube inclination on flooding in large diameter tubes. The current project aims to improve the level of understanding of flooding mechanisms and to develop an analysis model for more accurate evaluations of flooding in the … more
Date: September 14, 2008
Creator: Solmos, M., Hogan, K.J., VIerow, K.
Partner: UNT Libraries Government Documents Department
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Human Factors for Situation Assessment in Grid Operations

Description: Executive Summary Despite advances in technology, power system operators must assimilate overwhelming amounts of data to keep the grid operating. Analyses of recent blackouts have clearly demonstrated the need to enhance the operator’s situation awareness (SA). The long-term objective of this research is to integrate valuable technologies into the grid operator environment that support decision making under normal and abnormal operating conditions and remove non-technical barriers to enable the… more
Date: August 8, 2007
Creator: Guttromson, Ross T.; Schur, Anne; Greitzer, Frank L. & Paget, Mia L.
Partner: UNT Libraries Government Documents Department
open access

A Preliminary Analysis of the Economics of Using Distributed Energy as a Source of Reactive Power Supply

Description: A major blackout affecting 50 million people in the Northeast United States, where insufficient reactive power supply was an issue, and an increased number of filings made to the Federal Energy Regulatory Commission by generators for reactive power has led to a closer look at reactive power supply and compensation. The Northeastern Massachusetts region is one such area where there is an insufficiency in reactive power compensation. Distributed energy due to its close proximity to loads seems to… more
Date: April 1, 2006
Creator: Li, Fangxing; Kueck, John D; Rizy, D Tom & King, Thomas F
Partner: UNT Libraries Government Documents Department
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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

Demand Response Spinning Reserve Demonstration

Description: The Demand Response Spinning Reserve project is a pioneeringdemonstration of how existing utility load-management assets can providean important electricity system reliability resource known as spinningreserve. Using aggregated demand-side resources to provide spinningreserve will give grid operators at the California Independent SystemOperator (CAISO) and Southern California Edison (SCE) a powerful, newtool to improve system reliability, prevent rolling blackouts, and lowersystem operating cos… more
Date: May 1, 2007
Creator: Eto, Joseph H.; Nelson-Hoffman, Janine; Torres, Carlos; Hirth,Scott; Yinger, Bob; Kueck, John et al.
Partner: UNT Libraries Government Documents Department
open access

2006 Update of Business Downtime Costs

Description: The objective of this paper is to assess the downtime cost of power outages to businesses in the commercial and industrial sectors, updating and improving upon studies that have already been published on this subject. The goal is to produce a study that, relative to existing studies, (1) applies to a wider set of business types (2) reflects more current downtime costs, (3) accounts for the time duration factor of power outages, and (4) includes data on the costs imposed by real outages in a wel… more
Date: January 1, 2007
Creator: Hinrichs, Doug & Goggin, Michael
Partner: UNT Libraries Government Documents Department
open access

Reliability of the Solar One plant during the power production phase.

Description: Solar One is the world's largest central receiver power plant. During the last 4 years the plant availability was 80%, 83%, and 96%, respectively, during hours of sunshine. This reliability is considered to be excellent considering the plant is a first-of-a-kind facility and because it has been subjected to daily cyclic service. In this paper we present the frequencies and causes of the plant outages that occurred. The ten most important causes comprised 72% of the total outage time. Qualitativ… more
Date: January 1, 1989
Creator: Kolb, Gregory J. & Lopez, Charles W.
Partner: UNT Libraries Government Documents Department
open access

P Division monthly report, November 1948

Description: This progress report discusses activities at the P Division for the month of November 1948. All piles operated at 275 megawatts (MW) throughout the month except for outages listed under Area Activities in this report and except that F Pile operated at a reduced level during the first half of the month. This operation at reduced level was incident to the leaking process tube reported last month. A total of 81.4 tons of metal was discharged from the piles during the month. The 300 Area canned a t… more
Date: December 20, 1948
Creator: Lee, Edward P.
Partner: UNT Libraries Government Documents Department
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Development of alternate visual examination requirements for dynamic restraints (snubbers)

Description: Current plant technical specifications require an initial inservice visual examination of safety related equipment dynamic restraints (snubbers) to provide assurance of operability. The time to the next examination is as short as 1 month if 8 or more snubbers are found to be inoperable. Plant operators have observed that as the snubber population of a plant increases, the current plan becomes burdensome by requiring frequent shutdowns for examination of snubbers. The Nuclear Regulatory Commissi… more
Date: January 1, 1989
Creator: Reich, M.; Breidenbach, G. & Grossman, W.
Partner: UNT Libraries Government Documents Department
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Electric Power Monthly, August 1990. [Glossary included]

Description: The Electric Power Monthly (EPM) presents monthly summaries of electric utility statistics at the national, Census division, and State level. The purpose of this publication is to provide energy decisionmakers with accurate and timely information that may be used in forming various perspectives on electric issues that lie ahead. Data includes generation by energy source (coal, oil, gas, hydroelectric, and nuclear); generation by region; consumption of fossil fuels for power generation; sales of… more
Date: November 29, 1990
Partner: UNT Libraries Government Documents Department
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Electric power monthly, September 1990. [Glossary included]

Description: The purpose of this report is to provide energy decision makers with accurate and timely information that may be used in forming various perspectives on electric issues. The power plants considered include coal, petroleum, natural gas, hydroelectric, and nuclear power plants. Data are presented for power generation, fuel consumption, fuel receipts and cost, sales of electricity, and unusual occurrences at power plants. Data are compared at the national, Census division, and state levels. 4 figs… more
Date: December 17, 1990
Partner: UNT Libraries Government Documents Department
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Investigation into outages of electric power supply as the result of ice storms

Description: The accumulation of large amounts of ice on electric power distribution conductors and on trees surrounding these conductors has resulted in a number of extended customer electric power outages. Commonwealth Associates, Inc. was assigned the task of reviewing six ice-caused electric outages at the following utilities: Long Island Lighting Company; Portland General Electric; Central Illinois Public Service; Central Illinois Light Company; Dallas River Power and Light; and City Water, Light and P… more
Date: September 1, 1979
Partner: UNT Libraries Government Documents Department
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