National Library of Energy BETA

Sample records for reduce blackout risk

  1. Power Blackout Risks Risk Management Options

    E-Print Network [OSTI]

    Schrijver, Karel

    Power Blackout Risks Risk Management Options Emerging Risk Initiative ­ Position Paper November 2011 #12;2 Content 1. Summary 3 2. Power blackouts challenge society and economy 4 3. Blackout risks on the increase 5 3.1. How power market trends influence blackout risks 5 3.1.1. Liberalisation and privatisation

  2. Exploring Complex Systems Aspects of Blackout Risk and Mitigation

    SciTech Connect (OSTI)

    Newman, David E [University of Alaska; Carreras, Benjamin A [ORNL; Lynch, Vickie E [ORNL; Dobson, Ian [University of Wisconsin, Madison

    2011-01-01

    Electric power transmission systems are a key infrastructure, and blackouts of these systems have major consequences for the economy and national security. Analyses of blackout data suggest that blackout size distributions have a power law form over much of their range. This result is an indication that blackouts behave as a complex dynamical system. We use a simulation of an upgrading power transmission system to investigate how these complex system dynamics impact the assessment and mitigation of blackout risk. The mitigation of failures in complex systems needs to be approached with care. The mitigation efforts can move the system to a new dynamic equilibrium while remaining near criticality and preserving the power law region. Thus, while the absolute frequency of blackouts of all sizes may be reduced, the underlying forces can still cause the relative frequency of large blackouts to small blackouts to remain the same. Moreover, in some cases, efforts to mitigate small blackouts can even increase the frequency of large blackouts. This result occurs because the large and small blackouts are not mutually independent, but are strongly coupled by the complex dynamics.

  3. Blackouts, risk, and fat-tailed distributions

    E-Print Network [OSTI]

    Weron, R; Simonsen, Ingve; Weron, Rafal

    2005-01-01

    We analyze a 19-year time series of North American electric power transmission system blackouts. Contrary to previously reported results we find a fatter than exponential decay in the distribution of inter-occurrence times and evidence of seasonal dependence in the number of events. Our findings question the use of self-organized criticality, and in particular the sandpile model, as a paradigm of blackout dynamics in power transmission systems. Hopefully, though, they will provide guidelines to more accurate models for evaluation of blackout risk.

  4. Blackout 2003: The August 14, 2003 Blackout One Year Later: Actions...

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

    States and Canada To Reduce Blackout Risk A report to the US-Canada Power System Outage Task Force on steps taken in the United States and Canada to reduce blackout risk one...

  5. Blackout 2003: The August 14, 2003 Blackout One Year Later: Actions...

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

    System Outage Task Force on steps taken in the United States and Canada to reduce blackout risk one year after the August 14, 2003 blackout. Report to the U.S.-Canada Power...

  6. Bulk Power System Dynamics and Control -VII, August 19-24 2007, Charleston, South Carolina, USA Towards Quantifying Cascading Blackout Risk

    E-Print Network [OSTI]

    system. Therefore, we aim for efficient methods of estimating blackout risk that could work in a time Towards Quantifying Cascading Blackout Risk Ian Dobson Kevin R. Wierzbicki Janghoon Kim Hui Ren ECE. The ability to efficiently quantify cascading blackout risk from observed data and simulations could offer new

  7. Blackout 2003: Blackout Final Implementation Report | Department...

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

    Report Final Report on the August 14, 2003 Blackout in the United States and Canada: Causes and Recommendations Blackout Final Implementation Report More Documents &...

  8. Blackout 2003 University of

    E-Print Network [OSTI]

    Amin, S. Massoud

    Blackout 2003 MASSOUD AMIN University of Minnesota PUBLISHED BY THE IEEE COMPUTER SOCIETY I 1540 indicate that there was no apparent evidence of terrorism, the cascading blackouts were a sudden il According to data from the North American Electric Reliabil- ity Council (NERC) and analyses #12;Blackout

  9. PREPRINT; TO APPEAR IN IEEE TRANSACTIONS ON RELIABILITY IN 2011 1 Exploring complex systems aspects of blackout risk

    E-Print Network [OSTI]

    Dobson, Ian

    , IEEE Abstract--Electric power transmission systems are a key in- frastructure and blackouts-organized criticality, electric power transmission system, infrastructure, power law ACRONYM IEAR Interrupted Energy Power flow through transmission line joining node i to node j Fijmax Maximum power flow through

  10. Complex systems analysis of series of blackouts: cascading failure, critical points, and self-organization

    SciTech Connect (OSTI)

    Dobson, Ian [University of Wisconsin, Madison; Carreras, Benjamin A [ORNL; Lynch, Vickie E [ORNL; Newman, David E [University of Alaska

    2007-01-01

    We give an overview of a complex systems approach to large blackouts of electric power transmission systems caused by cascading failure. Instead of looking at the details of particular blackouts, we study the statistics and dynamics of series of blackouts with approximate global models. Blackout data from several countries suggest that the frequency of large blackouts is governed by a power law. The power law makes the risk of large blackouts consequential and is consistent with the power system being a complex system designed and operated near a critical point. Power system overall loading or stress relative to operating limits is a key factor affecting the risk of cascading failure. Power system blackout models and abstract models of cascading failure show critical points with power law behavior as load is increased. To explain why the power system is operated near these critical points and inspired by concepts from self-organized criticality, we suggest that power system operating margins evolve slowly to near a critical point and confirm this idea using a power system model. The slow evolution of the power system is driven by a steady increase in electric loading, economic pressures to maximize the use of the grid, and the engineering responses to blackouts that upgrade the system. Mitigation of blackout risk should account for dynamical effects in complex self-organized critical systems. For example, some methods of suppressing small blackouts could ultimately increase the risk of large blackouts.

  11. Innovative Computational Tools for Reducing Exploration Risk...

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

    Computational Tools for Reducing Exploration Risk Through Integration of Water-Rock Interactions and Magnetotelluric Surveys Innovative Computational Tools for Reducing Exploration...

  12. CRITICALITY IN A CASCADING FAILURE BLACKOUT MODEL Dusko P. Nedic

    E-Print Network [OSTI]

    n i f i - cant risk of large blackouts. Keywords: reliability, security, risk, power law 1, for all these types of interac- tion, the risk of cascading failure generally becomes more severe increases? Previous work suggests that a cascading failure does not gradually and uniformly be- come more

  13. Reducing Food Safety Risks in Community Gardens

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    Reducing Food Safety Risks in Community Gardens Creating and maintaining community and school gardens has been identified as an effective strategy to increase healthy food awareness and consumption in the U.S. since 1990. In commercial food production, employing a set of risk-reduction steps -- known

  14. Bulk Power System Dynamics and Control -VI, August 22-27, 2004, Cortina d'Ampezzo, Italy Complex Systems Analysis of Series of Blackouts

    E-Print Network [OSTI]

    Systems Analysis of Series of Blackouts: Cascading Failure, Criticality, and Self-organization Ian Dobson a comprehensive account of a complex systems ap- proach to large blackouts caused by cascading failure. In- stead of looking at the details of particular blackouts, we study the statistics, dynamics and risk of series

  15. Blackout 2003: Final Report on the August 14, 2003 Blackout in...

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

    2003: Final Report on the August 14, 2003 Blackout in the United States and Canada: Causes and Recommendations Blackout 2003: Final Report on the August 14, 2003 Blackout in the...

  16. Blackout 2003: Final Report on the August 14, 2003 Blackout in...

    Energy Savers [EERE]

    Final Report on the August 14, 2003 Blackout in the United States and Canada: Causes and Recommendations Blackout 2003: Final Report on the August 14, 2003 Blackout in the United...

  17. Milestone Reached: New Process Reduces Cost and Risk of Biofuel...

    Energy Savers [EERE]

    Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production from Bio-Oil Upgrading Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production from...

  18. How Damage Diversification Can Reduce Systemic Risk

    E-Print Network [OSTI]

    Burkholz, Rebekka; Schweitzer, Frank

    2015-01-01

    We consider the problem of risk diversification in complex networks. Nodes represent e.g. financial actors, whereas weighted links represent e.g. financial obligations (credits/debts). Each node has a risk to fail because of losses resulting from defaulting neighbors, which may lead to large failure cascades. Classical risk diversification strategies usually neglect network effects and therefore suggest that risk can be reduced if possible losses (i.e., exposures) are split among many neighbors (exposure diversification, ED). But from a complex networks perspective diversification implies higher connectivity of the system as a whole which can also lead to increasing failure risk of a node. To cope with this, we propose a different strategy (damage diversification, DD), i.e. the diversification of losses that are imposed on neighboring nodes as opposed to losses incurred by the node itself. Here, we quantify the potential of DD to reduce systemic risk in comparison to ED. For this, we develop a branching proce...

  19. Modeling radio communication blackout and blackout mitigation in hypersonic vehicles

    E-Print Network [OSTI]

    Kundrapu, Madhusudhan; Beckwith, Kristian; Stoltz, Peter; Shashurin, Alexey; Keidar, Michael

    2014-01-01

    A procedure for the modeling and analysis of radio communication blackout of hypersonic vehicles is presented. A weakly ionized plasma generated around the surface of a hypersonic reentry vehicle traveling at Mach 23 was simulated using full Navier-Stokes equations in multi-species single fluid form. A seven species air chemistry model is used to compute the individual species densities in air including ionization - plasma densities are compared with experiment. The electromagnetic wave's interaction with the plasma layer is modeled using multi-fluid equations for fluid transport and full Maxwell's equations for the electromagnetic fields. The multi-fluid solver is verified for a whistler wave propagating through a slab. First principles radio communication blackout over a hypersonic vehicle is demonstrated along with a simple blackout mitigation scheme using a magnetic window.

  20. Report from the Blackout of 2003 in New York City

    E-Print Network [OSTI]

    Comite, Stephen MD

    2003-01-01

    Report from the Blackout of 2003 in New York City Stephenabout experiences with the recent blackout in New York Citywhat happened in the 1977 blackout with looting and fires,

  1. The Northeast Blackout of 1965

    SciTech Connect (OSTI)

    Vassell, G.S.

    1990-10-11

    Twenty-five years ago, on November 9, 1965, the electric utility industry - and the nation - experienced the biggest power failure in history. While major power outages did happen before and after this unique event, none of them came even close to the Great Northeast Blackout of 1965 - not in terms of the size of the area or the number of people affected, not in terms of the trauma inflicted on the society at large, and not in terms of its impact on the electric utility industry. With our institution memory - as a society - being as short as it is, many of the lessons that were learned by the industry, by the regulators, and by the nation at large in the wake of the Northeast Blackout have been, by now, mostly forgotten. The 25th anniversary of this event offers a unique opportunity, therefore, to refresh our institutional memory in this regard and, by doing so, bring to bear our past experience to the problems of today. This article has been written with this objective in mind and from the perspective of an individual who experienced firsthand - as an active electric utility industry participant - the Northeast Blackout itself, its aftermath, and the subsequent evolution of the industry to the present day.

  2. ARMOR: Analyzer for Reducing Module Operational Risk Michael R. Lyu

    E-Print Network [OSTI]

    Lyu, Michael R.

    contained in software systems or modules. To model software risk the quality indica­ tors of software and establishment of quality index of software programs. However, few tool can both perform sophisticated risk for Reducing Module Operational Risk) is a software risk analysis tool which automati­ cally identifies

  3. Milestone Reached: New Process Reduces Cost and Risk of Biofuel...

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

    cellulosic ethanol. Addthis Related Articles Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production from Bio-Oil Upgrading Refining Bio-Oil alongside Petroleum...

  4. Reducing the Risk of Arc-Faults

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAbout Us Hanford SiteRecoveryWaterthe Risk of

  5. Reduce Risk, Increase Clean Energy: How States and Cities are...

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

    Provides a overview of finance tools available to scale-up to clean energy. Author: Clean Energy and Bond Finance Initiative (CE+BFI) Reduce Risk, Increase Clean Energy More...

  6. Utilities respond to nuclear station blackout rule

    SciTech Connect (OSTI)

    Rubin, A.M.; Beasley, B.; Tenera, L.P

    1990-02-01

    The authors discuss how nuclear plants in the United States have taken actions to respond to the NRC Station Blackout Rule, 10CFR50.63. The rule requires that each light water cooled nuclear power plant licensed to operate must be able to withstand for a specified duration and recover from a station blackout. Station blackout is defined as the complete loss of a-c power to the essential and non-essential switch-gear buses in a nuclear power plant. A station blackout results from the loss of all off-site power as well as the on-site emergency a-c power system. There are two basic approaches to meeting the station blackout rule. One is to cope with a station blackout independent of a-c power. Coping, as it is called, means the ability of a plant to achieve and maintain a safe shutdown condition. The second approach is to provide an alternate a-c power source (AAC).

  7. Reducing Risk for the Next Generation Nuclear Plant

    SciTech Connect (OSTI)

    John M. Beck II; Harold J. Heydt; Emmanuel O. Opare; Kyle B. Oswald

    2010-07-01

    The Next Generation Nuclear Plant (NGNP) Project, managed by the Idaho National Laboratory (INL), is directed by the Energy Policy Act of 2005, to research, develop, design, construct, and operate a prototype forth generation nuclear reactor to meet the needs of the 21st Century. As with all large projects developing and deploying new technologies, the NGNP has numerous risks that need to be identified, tracked, mitigated, and reduced in order for successful project completion. A Risk Management Plan (RMP) was created to outline the process the INL is using to manage the risks and reduction strategies for the NGNP Project. Integral to the RMP is the development and use of a Risk Management System (RMS). The RMS is a tool that supports management and monitoring of the project risks. The RMS does not only contain a risk register, but other functionality that allows decision makers, engineering staff, and technology researchers to review and monitor the risks as the project matures.

  8. Risk Analysis DOI: 10.1111/risa.12203 Public Support for Policies to Reduce Risk After

    E-Print Network [OSTI]

    Broccoli, Anthony J.

    Risk Analysis DOI: 10.1111/risa.12203 Public Support for Policies to Reduce Risk After Hurricane-circulation newspaper in New Jersey, James 1 0272-4332/14/0100-0001$22.00/1 C 2014 Society for Risk Analysis #12

  9. Station blackout transients in the semiscale facility

    SciTech Connect (OSTI)

    Chapman, J.C.

    1985-12-01

    The test results of station blackout transients conducted in the Semiscale MOD-2B facility are discussed in this report. The Semiscale MOD-2B facility simulates a pressurized water reactor (PWR) power plant. The experiments were initiated from conditions typical of PWR plant operating conditions (primary pressure of 15.2 MPa (2205 psi) and cold leg fluid temperature of 550 K (530F)). Five station blackout experiments were conducted, Three tests in the Power Loss (PL) Test Series and the two Primary Boil-off (PBO) Tests. The responses of these tests were analyzed and compared. However, only one test response (S-PL-2) is presented and discussed in detail. The S-PL-2 experiment is characterized by examining the responses of the primary and secondary pressures and fluid temperatures, the pressurizer liquid level, the primary fluid distribution, and the core thermal behavior. The mechanisms driving the S-PL-2 responses, the main elements of the station blackout transient, the influences of initial and boundary conditions and other transient that may appear similar to a station blackout are also discussed. Information pertinent to station blackout nuclear safety issues is presented in the report. 13 refs., 44 figs.

  10. REGIONAL BLACKOUTS: PROTECTION OF BROADCAST CONTENT ON 3G NETWORKS

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    REGIONAL BLACKOUTS: PROTECTION OF BROADCAST CONTENT ON 3G NETWORKS Alexander W. Dent, Allan- gional blackouts. Broadcasters are often required to res- trict broadcasts of certain content to specific of reception is outside the blackout region. What is now required is proof that the end user is outside

  11. A surety engineering framework to reduce cognitive systems risks.

    SciTech Connect (OSTI)

    Caudell, Thomas P.; Peercy, David Eugene; Caldera, Eva O.; Shaneyfelt, Wendy L.

    2008-12-01

    Cognitive science research investigates the advancement of human cognition and neuroscience capabilities. Addressing risks associated with these advancements can counter potential program failures, legal and ethical issues, constraints to scientific research, and product vulnerabilities. Survey results, focus group discussions, cognitive science experts, and surety researchers concur technical risks exist that could impact cognitive science research in areas such as medicine, privacy, human enhancement, law and policy, military applications, and national security (SAND2006-6895). This SAND report documents a surety engineering framework and a process for identifying cognitive system technical, ethical, legal and societal risks and applying appropriate surety methods to reduce such risks. The framework consists of several models: Specification, Design, Evaluation, Risk, and Maturity. Two detailed case studies are included to illustrate the use of the process and framework. Several Appendices provide detailed information on existing cognitive system architectures; ethical, legal, and societal risk research; surety methods and technologies; and educing information research with a case study vignette. The process and framework provide a model for how cognitive systems research and full-scale product development can apply surety engineering to reduce perceived and actual risks.

  12. Blackout of 2003: Description and Responses

    E-Print Network [OSTI]

    Systems Institut de recherche d'Hydro-Québec (IREQ) ISO New England Korea Elec. Power Research InstitutePSERC Blackout of 2003: Description and Responses Dennis Ray Executive Director Power Systems interchange of ideas · Educate the next generation of power industry engineers #12;3 PSERC Collaborating

  13. Reduced updated version forthcoming in Energy Risk COUNTERPARTY RISK VALUATION FOR

    E-Print Network [OSTI]

    Brigo, Damiano

    Reduced updated version forthcoming in Energy Risk COUNTERPARTY RISK VALUATION FOR ENERGY prices, in principle, agree under some simplifying assumptions. One of the most relevant assumptions on energy commodities and on Oil in particular. We use a hybrid commodities-credit model to asses impact

  14. CORC Report TR-2005-07 Using mixed-integer programming to solve power grid blackout

    E-Print Network [OSTI]

    Bienstock, Daniel

    CORC Report TR-2005-07 Using mixed-integer programming to solve power grid blackout problems Daniel the blackouts of the U.S. Northeast and Eastern Canada [17] of August 2003, and the September 2003 blackout that affected Italy [19]. In addition, Brazil experienced large blackouts in 1999 (see [15]). These blackouts

  15. Rapid Assessment, Visualization and Mitigation of Cascading Failure Risk in Power Systems

    E-Print Network [OSTI]

    Eppstein, Margaret J.

    cascading blackouts triggered by multiple contingen- cies. On a 2383 bus test case the new approach finds the expected value of large-blackout sizes (a measure of risk) two orders of magnitude faster than Monte Carlo of blackout risk to individual component-failure probabili- ties, allowing one to quickly identify low

  16. Blackout 2003: U.S. - Canada Task Force Presents Final Report...

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

    U.S. - Canada Task Force Presents Final Report onBlackout of August 2003 Blackout 2003: U.S. - Canada Task Force Presents Final Report onBlackout of August 2003 August 14, 2003,...

  17. Use of comprehensive NEPA documents to reduce program risk

    SciTech Connect (OSTI)

    Wolff, T.A.; Hansen, R.P.

    1994-04-01

    Sandia National Laboratories operates DOE`s Kauai Test Facility (KTF) on the western coast of the Hawaiian island of Kauai. In July 1992, DOE approved a comprehensive Environmental Assessment (EA) covering ongoing and future rocket launches of experimental payloads. The KTF EA fulfilled two basic objectives: Consideration of environmental values early in the planning and decision making process; and public disclosure. These objectives can also be considered to be benefits of preparing comprehensive NEPA documents. However, proponents of an action are not as dedicated to these twin NEPA objectives as they are motivated by NEPA`s ability to reduce program risks. Once the KTF environmental assessment was underway, it was apparent that reducing risks to the program, budget, and schedule was the main incentive for successful completion of the EA. The comprehensive or ``omnibus`` environmental assessment prepared for the KTF is a de facto ``detailed statement,`` and it is also a good example of a ``mitigated FONSI,`` i.e., mitigation measures are essential to render some potential impacts not significant. Because the KTF EA is a broad scope, umbrella-like, site-wide assessment, it ``bounds`` the impacts of continuing and proposed future actions. The successful completion of this document eliminated the need to review, document, and gain approval individually for numerous related actions. Also, because it supported a Finding of No Significant Impact (FONSI) after identifying appropriate mitigation, it also eliminated the need for an environmental impact statement (EIS). This paper discusses seven specific ways in which the KTF EA reduced program risks and supported budget and schedule objectives.

  18. Blackout 2003: Transcript of Technical Conference with the Electric...

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

    consultation Transcript of the technical conference sponsored by the U.S. Canada task force investigating the August 14, 2003 blackout across Canada and the...

  19. Blackout 2003: Transcript of Technical Conference with the Electric...

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

    Transcript of Technical Conference with the Electric System Investigation Team Blackout 2003: Transcript of Technical Conference with the Electric System Investigation Team...

  20. Blackout 2003: Conference for public review draft report on implementa...

    Energy Savers [EERE]

    for public review draft report on implementation of the task force recommendations Blackout 2003: Conference for public review draft report on implementation of the task force...

  1. Blackout 2003: Energy Secretary Bodman and Minister of Natural...

    Energy Savers [EERE]

    Resources for Canada Lunn Release the 2003 Power Outage Final Report, October 3, 2006 Blackout 2003: Energy Secretary Bodman and Minister of Natural Resources for Canada Lunn...

  2. Power Systems and Communications Infrastructures for the future, Beijing, September 2002 AN INITIAL COMPLEX SYSTEMS ANALYSIS OF THE RISKS OF

    E-Print Network [OSTI]

    COMPLEX SYSTEMS ANALYSIS OF THE RISKS OF BLACKOUTS IN POWER TRANSMISSION SYSTEMS I. Dobson D. E. Newman B of blackout risk. Indeed, the mitigation of failures in complex systems needs to be approached with care. To motivate our work we consider the statistics of series of blackouts. The North American Electrical

  3. Cascading Failure Risk Variation with Generator Dispatch and System Load Level

    E-Print Network [OSTI]

    Rezaei, Pooya

    2013-01-01

    Industry reliability rules increasingly require utilities to study and mitigate cascading failure risk in their system. Motivated by this, this paper describes how cascading failure risk, in terms of expected blackout size, varies with power system load level and pre-contingency dispatch. We used Monte Carlo sampling of random branch outages to model contingencies, and a model of cascading failure to estimate blackout sizes. The risk associated with different blackout sizes is separately estimated in order to separate small, medium, and large blackout risk. Results from N-1 secure models of the IEEE RTS case and a 2383 bus case indicate that blackout risk does not always increase with load level, particularly for large blackout risk. The results also show that risk is highly dependent on the method used for generator dispatch. Minimum cost methods of dispatch can result in larger long distance power transfers, which can increase cascading failure risk.

  4. Reducing Poverty Risk in Developing Countries Project No. Project Title Project Leader

    E-Print Network [OSTI]

    Krivobokova, Tatyana

    1 Reducing Poverty Risk in Developing Countries Project No. Project Title Project Leader 1 Dynamic). At the same time, there will be substantial collaboration between the projects to develop this common research in developing countries Lay 5 Informal risk sharing networks as an strategy to reduce poverty risk Ibanez

  5. Regulatory approval of cancer risk-reducing (chemopreventive) drugs: moving what we have learned into the clinic.

    E-Print Network [OSTI]

    2011-01-01

    Risk-Reducing (Chemopreventive) Drugs: Moving What We Haverisk reduction) drugs and discusses possible improvements toof Cancer Risk- Reducing Drugs approach along with primary

  6. Determination of station blackout frequency-duration relationships

    SciTech Connect (OSTI)

    Griggs, D.P.; Riggs, B.K.; Balakrishna, S.

    1986-01-01

    Station blackout is the loss of all alternating current (ac) power to the essential and nonessential electrical buses in a nuclear power plant. This generally involves the loss of redundant off-site power sources and the failure of two or more emergency diesel generators (EDGs). The US Nuclear Regulatory Commission (NRC) has proposed requiring all commercial reactors to have the capability of coping with a station blackout of a specified duration. The NRC has also proposed 4 or 8 h as acceptable durations, depending on plant susceptibility to the occurrence of station blackout events. Analyses were performed to determine expected station blackout frequencies representative of a majority of domestic nuclear power plants. A methodology based on that developed by the NRC was used. Representative industry data for loss of off-site power (LOOP) events and EDG reliability were used in the analyses.

  7. Loss of pressurizer water level during station blackout

    SciTech Connect (OSTI)

    Griggs, D.P.; Riggs, B.K.

    1986-01-01

    Station blackout is the loss of all alternating current (ac) power to both the essential and nonessential electrical buses in a nuclear power plant. The US Nuclear Regulatory Commission (NRC) has proposed a requirement that all plants be capable of maintaining adequate core cooling during station blackout events lasting a specified duration. The NRC has also suggested acceptable specified durations of four or eight hours, depending on individual plant susceptibility to blackout events. In a pressurized water reactor (PWR), the occurrence of a station blackout event results in the functional loss of many plant components, including main feedwater, reactor coolant pumps, the emergency core cooling system, and pressurizer heaters and spray. Nevertheless, PWRs have the capability of removing decay heat for some period of time using steam-driven auxiliary feedwater pumps and the natural-circulation capability of the primary system. The purpose of this investigation is to determine the early response of a PWR to station blackout conditions. In particular, the effect of primary coolant shrinkage and inventory loss on pressurizer level is examined to gain insight into the operational and analytical issues associated with the proposed station blackout coping requirement.

  8. Proposed SPAR Modeling Method for Quantifying Time Dependent Station Blackout Cut Sets

    SciTech Connect (OSTI)

    John A. Schroeder

    2010-06-01

    Abstract: The U.S. Nuclear Regulatory Commission’s (USNRC’s) Standardized Plant Analysis Risk (SPAR) models and industry risk models take similar approaches to analyzing the risk associated with loss of offsite power and station blackout (LOOP/SBO) events at nuclear reactor plants. In both SPAR models and industry models, core damage risk resulting from a LOOP/SBO event is analyzed using a combination of event trees and fault trees that produce cut sets that are, in turn, quantified to obtain a numerical estimate of the resulting core damage risk. A proposed SPAR method for quantifying the time-dependent cut sets is sometimes referred to as a convolution method. The SPAR method reflects assumptions about the timing of emergency diesel failures, the timing of subsequent attempts at emergency diesel repair, and the timing of core damage that may be different than those often used in industry models. This paper describes the proposed SPAR method.

  9. Abstract--Many large scale system blackouts involve relay misoperations. Traditional relay algorithms and settings need to

    E-Print Network [OSTI]

    1 Abstract--Many large scale system blackouts involve relay misoperations. Traditional relay-wide blackouts involve relay misoperations [1]. Evaluation and improvement of existing relay algorithms

  10. RISK-BASED EVALUATION OF OPERATING RESTRICTIONS TO REDUCE THE RISK OF EARTHQUAKE-INDUCED DAM FAILURE

    E-Print Network [OSTI]

    Bowles, David S.

    RISK-BASED EVALUATION OF OPERATING RESTRICTIONS TO REDUCE THE RISK OF EARTHQUAKE-INDUCED DAM and consequences of an Earthquake-induced dam failure. The potential for both a sudden overtopping failure on the seismic performance of the dam, the potential life loss and economic consequences of Earthquake

  11. Station Blackout: A case study in the interaction of mechanistic and probabilistic safety analysis

    SciTech Connect (OSTI)

    Curtis Smith; Diego Mandelli; Cristian Rabiti

    2013-11-01

    The ability to better characterize and quantify safety margins is important to improved decision making about nuclear power plant design, operation, and plant life extension. As research and development (R&D) in the light-water reactor (LWR) Sustainability (LWRS) Program and other collaborative efforts yield new data, sensors, and improved scientific understanding of physical processes that govern the aging and degradation of plant SSCs needs and opportunities to better optimize plant safety and performance will become known. The purpose of the Risk Informed Safety Margin Characterization (RISMC) Pathway R&D is to support plant decisions for risk-informed margin management with the aim to improve economics, reliability, and sustain safety of current NPPs. In this paper, we describe the RISMC analysis process illustrating how mechanistic and probabilistic approaches are combined in order to estimate a safety margin. We use the scenario of a “station blackout” wherein offsite power and onsite power is lost, thereby causing a challenge to plant safety systems. We describe the RISMC approach, illustrate the station blackout modeling, and contrast this with traditional risk analysis modeling for this type of accident scenario.

  12. Study of a Station Blackout Event in the PWR Plant

    SciTech Connect (OSTI)

    Ching-Hui Wu; Tsu-Jen Lin; Tsu-Mu Kao [Institute of Nuclear Energy Research P.O. Box 3-3, Longtan, 32500, Taiwan (China)

    2002-07-01

    On March 18, 2001, a PWR nuclear power plant located in the Southern Taiwan occurred a Station Blackout (SBO) event. Monsoon seawater mist caused the instability of offsite power grids. High salt-contained mist caused offsite power supply to the nuclear power plant very unstable, and forced the plant to be shutdown. Around 24 hours later, when both units in the plant were shutdown, several inadequate high cycles of bus transfer between 345 kV and 161 kV startup transformers degraded the emergency 4.16 kV switchgears. Then, in the Train-A switchgear room of Unit 1 occurred a fire explosion, when the degraded switchgear was hot shorted at the in-coming 345 kV breaker. Inadequate configuration arrangement of the offsite power supply to the emergency 4.16 kV switchgears led to loss of offsite power (LOOP) events to both units in the plant. Both emergency diesel generators (EDG) of Unit 1 could not be in service in time, but those of Unit 2 were running well. The SBO event of Unit 1 lasted for about two hours till the fifth EDG (DG-5) was lined-up to the Train-B switchgear. This study investigated the scenario of the SBO event and evaluated a risk profile for the SBO period. Guidelines in the SBO event, suggested by probabilistic risk assessment (PRA) procedures were also reviewed. Many related topics such as the re-configuration of offsite power supply, the addition of isolation breakers of the emergency 4.16 kV switchgears, the betterment of DG-5 lineup design, and enhancement of the reliability of offsite power supply to the PWR plant, etc., will be in further studies. (authors)

  13. Complex Dynamics of Blackouts in Power Transmission Systems B. A. Carreras and V. E. Lynch

    E-Print Network [OSTI]

    Electrical Reliability Council (NERC) data on blackouts of the North American power grid4 gave an average Individual blackouts are triggered by random events ranging from equipment failures and bad weather

  14. Drosophila Rolling Blackout Displays Lipase Domain-Dependent and Independent Endocytic Functions Downstream of Dynamin

    E-Print Network [OSTI]

    Broadie, Kendal S.

    Drosophila Rolling Blackout Displays Lipase Domain-Dependent and Independent Endocytic Functions Drosophila temperature-sensitive rolling blackout (rbots) mutants display a total block of endocytosis in non rolling blackout (rbo), also known as conserved membrane protein at 44E (cmp44E) and stambhA (stmA) (8

  15. The 2003 North American electrical blackout: An accidental experiment in atmospheric chemistry

    E-Print Network [OSTI]

    Stehr, Jeffrey

    The 2003 North American electrical blackout: An accidental experiment in atmospheric chemistry 2004; published 15 July 2004. [1] The August 2003 North American electrical blackout provided a unique observations over central Pennsylvania on August 15, 2003, $24 h into the blackout, revealed large reductions

  16. Blackouts: des vrits qui drangent Prof. Damien Ernst Universit de Lige

    E-Print Network [OSTI]

    Ernst, Damien

    Blackouts: des vérités qui dérangent Prof. Damien Ernst ­ Université de Liège Novembre 2014 www un blackout. Cet hiver 2014-2015 en Belgique: Risque important que l'offre disponible soit inférieure à la demande. Mise en place de plans de délestage pour éviter le blackout total. #12;Mais comment

  17. Cellular/Molecular Rolling Blackout Is Required for Synaptic Vesicle Exocytosis

    E-Print Network [OSTI]

    Broadie, Kendal S.

    Cellular/Molecular Rolling Blackout Is Required for Synaptic Vesicle Exocytosis Fu-De Huang, Elvin 37235-1634 Rolling blackout (RBO) is a putative transmembrane lipase required for phospholipase C; Kidokoro et al., 2004). We report here a new TS paralytic mutant, rolling blackout (rbo), which similarly

  18. STATISTICAL ESTIMATION OF CASCADING BLACKOUT SIZE AND PROPAGATION WITH BRANCHING PROCESSES

    E-Print Network [OSTI]

    STATISTICAL ESTIMATION OF CASCADING BLACKOUT SIZE AND PROPAGATION WITH BRANCHING PROCESSES by Kevin Processes with Power Systems . . . . . . . . . . . . . . . . 3 1.1.2 Additional Cascading Blackout Research and . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.2.2 Estimating blackout size pdf . . . . . . . . . . . . . . . . . . . . . . . 18 3.2.3 Note

  19. Preventing Future Blackouts by Means of Enhanced Electric Power Systems Control: From

    E-Print Network [OSTI]

    Preventing Future Blackouts by Means of Enhanced Electric Power Systems Control: From Complexity that re- semble the blackout of August 2003. Also, the potential for efficient use of the resources during--Advanced control, complex large-scale dynamical systems, electric power blackouts, electricity restructuring

  20. Scientific Opportunities to Reduce Risk in Nuclear Process Science - 9279

    SciTech Connect (OSTI)

    Bredt, Paul R.; Felmy, Andrew R.; Gauglitz, Phillip A.; Poloski, Adam P.; Vienna, John D.; Moyer, Bruce A.; Hobbs, David; Wilmarth, B.; Mcilwain, Michael; Subramanian, K.; Krahn, Steve; Machara, N.

    2009-03-01

    In this document, we propose that scientific investments for the disposal of nuclear and hazardous wastes should not be focused solely on what may be viewed as current Department of Energy needs, but also upon longer-term investments in specific areas of science that underpin technologies presently in use. In the latter regard, we propose four science theme areas: 1) the structure and dynamics of materials and interfaces, 2) coupled chemical and physical processes, 3) complex solution phase phenomena, and 4) chemical recognition phenomena. The proposed scientific focus for each of these theme areas and the scientific opportunities are identified, along with links to major risks within the initiative areas identified in EM’s Engineering and Technology Roadmap.

  1. Reducing the risk to Mars: The gas core nuclear rocket

    SciTech Connect (OSTI)

    Howe, S.D.; DeVolder, B.; Thode, L.; Zerkle, D.

    1998-12-31

    The next giant leap for mankind will be the human exploration of Mars. Almost certainly within the next thirty years, a human crew will brave the isolation, the radiation, and the lack of gravity to walk on and explore the Red planet. However, because the mission distances and duration will be hundreds of times greater than the lunar missions, a human crew will face much greater obstacles and a higher risk than those experienced during the Apollo program. A single solution to many of these obstacles is to dramatically decrease the mission duration by developing a high performance propulsion system. The gas-core nuclear rocket (GCNR) has the potential to be such a system. The authors have completed a comparative study of the potential impact that a GCNR could have on a manned Mars mission. The total IMLEO, transit times, and accumulated radiation dose to the crew will be compared with the NASA Design Reference Missions.

  2. Abstract--Relay misoperations play an important role in cascading blackouts. Power swing and out-of-step conditions

    E-Print Network [OSTI]

    1 Abstract--Relay misoperations play an important role in cascading blackouts. Power swing and out in the way that the power grid is operated. The major blackouts in the US, such as Midwest and Northeast blackout on August 14, 2003 and Western blackouts on July 2 and August 10, 1996, are the results of heavy

  3. Initial Evidence for Self-Organized Criticality in Electric Power System Blackouts

    SciTech Connect (OSTI)

    Carreras, B.A.; Dobson, I.; Newman, D.E.; Poole, A.B.

    2000-01-04

    We examine correlations in a time series of electric power system blackout sizes using scaled window variance analysis and R/S statistics. The data shows some evidence of long time correlations and has Hurst exponent near 0.7. Large blackouts tend to correlate with further large blackouts after a long time interval. Similar effects are also observed in many other complex systems exhibiting self-organized criticality. We discuss this initial evidence and possible explanations for self-organized criticality in power systems blackouts. Self-organized criticality, if fully confirmed in power systems, would suggest new approaches to understanding and possibly controlling blackouts.

  4. Simulating Pelletization Strategies to Reduce the Biomass Supply Risk at America's Biorefineries

    E-Print Network [OSTI]

    Ford, Andrew

    1 Simulating Pelletization Strategies to Reduce the Biomass Supply Risk at America's Biorefineries the targets. This paper explores pelletizer strategies to convert the lignocellulosic biomass into a denser system would outperform conventional biorefinery supply systems. Pelletizer strategies exhibit somewhat

  5. Scientific Opportunities to Reduce Risk in Nuclear Process Science

    SciTech Connect (OSTI)

    Bredt, Paul R.; Felmy, Andrew R.; Gauglitz, Phillip A.; Poloski, Adam P.; Vienna, John D.; Moyer, Bruce A.; Hobbs, David; Wilmarth, B.; Mcilwain, Michael; Subramanian, K.; Krahn, Steve; Machara, N.

    2009-08-28

    Cleaning up the nation’s nuclear weapons complex remains as one of the most technologically challenging and financially costly problems facing the U.S. Department of Energy (DOE). Safety, cost, and technological challenges have often delayed progress in retrieval, processing, and final disposition of high-level waste, spent nuclear fuel, and challenging materials. Some of the issues result from the difficulty and complexity of the technological issues; others have programmatic bases, such as strategies that may provide undue focus on near-term goals or difficulty in developing and maintaining stakeholder confidence in the proposed solutions. We propose that independent basic fundamental science research, addressing the full cleanup life-cycle, offers an opportunity to help address these challenges by providing 1) scientific insight into the fundamental mechanisms involved in currently selected processing and disposal options, 2) a rational path to the development of alternative technologies should the primary options fail, 3) confidence that models that predict long-term performance of different disposal options are based upon the best available science, and 4) fundamental science discovery that enables transformational solutions to revolutionize the current baseline processes. Over the last 3 years, DOE’s Office of Environmental Management (EM) has experienced a fundamental shift in philosophy. The mission focus of driving to closure has been replaced by one of enabling the long-term needs of DOE and the nation. Resolving new challenges, such as the disposition of DOE spent nuclear fuel, have been added to EM’s responsibilities. In addition, the schedules for addressing several elements of the cleanup mission have been extended. As a result, EM’s mission is no longer focused only on driving the current baselines to closure. Meeting the mission will require fundamental advances over at least a 30-year window if not longer as new challenges are added. The overall intent of this paper is to foster a dialogue on how basic scientific research can assist DOE in executing its cleanup and environmental management mission. In this paper, we propose that such scientific investments not be focused solely on what may be viewed as current DOE needs, but also be based upon longer-term investments in specific areas of science that underpin technologies presently in use. In the latter regard, we propose four science theme areas: 1) the structure and dynamics of materials and interfaces, 2) coupled chemical and physical processes, 3) complex solution phase phenomena, and 4) chemical recognition phenomena. The proposed scientific focus for each of these theme areas and the scientific opportunities are identified, along with links to major risks within the initiative areas identified in EM’s Engineering and Technology Roadmap.

  6. Grid Watch: Mapping Blackouts with Smart Phones Noah Klugman

    E-Print Network [OSTI]

    Dutta, Prabal

    Grid Watch: Mapping Blackouts with Smart Phones Noah Klugman , Javier Rosa , Pat Pannuto , Matthew General Terms Economics, Measurement, Reliability, Security Keywords Smart Grid, Power Monitoring into the power grid is via a cen- tralized network of utility owned, deployed, and controlled smart meters. While

  7. QuPARA: Query-Driven Large-Scale Portfolio Aggregate Risk Analysis on MapReduce

    E-Print Network [OSTI]

    Rau-Chaplin, Andrew

    QuPARA: Query-Driven Large-Scale Portfolio Aggregate Risk Analysis on MapReduce Andrew Rau and reinsurance companies use stochastic simulation techniques for portfolio risk analysis. Their risk portfolios framework for portfolio risk analysis that facilitates answering a rich variety of catastrophic risk queries

  8. Does Liberalisation cause more Electricity Blackouts? Evidence from a Global Study of Newspaper Reports

    E-Print Network [OSTI]

    Yu, William; Pollitt, Michael G.

    K IN G P A P E R Abstract Does Liberalisation cause more electricity blackouts? Evidence from a global study of newspaper reports EPRG Working Paper 0827 Cambridge Working Paper in Economics 0911 William Yu and Michael G... .Pollitt There is a public perception that electricity liberalisation is the major cause of recent electricity blackouts. This is reflected in the newspaper reporting of blackouts. By contrast, it was not listed as a cause in any official investigation reports...

  9. Estimating Failure Propagation in Models of Cascading Blackouts

    SciTech Connect (OSTI)

    Dobson, Ian [University of Wisconsin, Madison; Carreras, Benjamin A [ORNL; Lynch, Vickie E [ORNL; Nkei, Bertrand [ORNL; Newman, David E [University of Alaska

    2005-09-01

    We compare and test statistical estimates of failure propagation in data from versions of a probabilistic model of loading-dependent cascading failure and a power systems blackout model of cascading transmission line overloads. The comparisons suggest mechanisms affecting failure propagation and are an initial step towards monitoring failure propagation from practical system data. Approximations to the probabilistic model describe the forms of probability distributions of cascade sizes.

  10. POTENTIAL HEALTH RISK REDUCTION ARISING FROM REDUCED MERCURY EMISSIONS FROM COAL FIRED POWER PLANTS.

    SciTech Connect (OSTI)

    Sullivan, T. M.; Lipfert, F. W.; Morris, S. C.; Moskowitz, P. D.

    2001-09-01

    The U.S. Environmental Protection Agency (EPA) has announced plans to regulate mercury (Hg) emissions from coal-fired power plants. EPA has not prepared a quantitative assessment of the reduction in risk that could be achieved through reduction in coal plant emissions of Hg. To address this issue, Brookhaven National Laboratory (BNL) with support from the U.S. Department of Energy Office of Fossil Energy (DOE FE) prepared a quantitative assessment of the reduction in human health risk that could be achieved through reduction in coal plant emissions of Hg. The primary pathway for Hg exposure is through consumption of fish. The most susceptible population to Hg exposure is the fetus. Therefore the risk assessment focused on consumption of fish by women of child-bearing age. Dose response factors were generated from studies on loss of cognitive abilities (language skills, motor skills, etc.) by young children whose mothers consumed large amounts of fish with high Hg levels. Population risks were estimated for the general population in three regions of the country, (the Midwest, Northeast, and Southeast) that were identified by EPA as being heavily impacted by coal emissions. Three scenarios for reducing Hg emissions from coal plants were considered: (1) A base case using current conditions; (2) A 50% reduction; and, (3) A 90% reduction. These reductions in emissions were assumed to translate linearly into a reduction in fish Hg levels of 8.6% and 15.5%, respectively. Population risk estimates were also calculated for two subsistence fisher populations. These groups of people consume substantially more fish than the general public and, depending on location, the fish may contain higher Hg levels than average. Risk estimates for these groups were calculated for the three Hg levels used for the general population analyses. Analysis shows that the general population risks for exposure of the fetus to Hg are small. Estimated risks under current conditions (i.e., no specific Hg controls) ranged from 5.7 x 10{sup -6} in the Midwest to 2 x 10{sup -5} in the Southeast. Reducing emissions from coal plants by 90% reduced the estimated range in risk to 5 x 10{sup -6} in the Midwest and 1.5 x 10{sup -5} in Southeast, respectively. The population risk for the subsistence fisher using the Southeast regional fish Hg levels was 3.8 x 10{sup -3}, a factor of 200 greater than the general population risk. For the subsistence fishers and the Savannah River Hg levels, the population risk was 4.3 x 10{sup -5}, a factor of 2 greater than for the general population. The estimated risk reductions from a 90% reduction in coal plant Hg emissions ranged from 25%-68%, which is greater than the assumed reduction in Hg levels in fish, (15.5%). To place this risk in perspective, there are approximately 4 x 10{sup 6} births/year in the U.S (National Vital Statistics Report, 2000). Assuming that the Southeast risk level (the highest of the regions) is appropriate for the entire U.S., an estimate of 80 newborn children per year have a 5% chance of realizing any of the 16 adverse effects used to generate the DRF. If Hg emissions from power plants are reduced 90%, the number of children at risk is reduced to 60.

  11. Reduced form electricity spot price modeling with a view towards spike risk

    E-Print Network [OSTI]

    Gerkmann, Ralf

    Reduced form electricity spot price modeling with a view towards spike risk Prof. Dr. Meyer. Februar 2010, 16:15 Uhr Seminarraum, Ludwigstraße 33 I The recent deregulation of electricity markets has led to the creation of energy exchanges, where the electricity is freely traded. We study the most

  12. WHOLE-FARM APPLE ARTHROPOD MANAGEMENT USING REDUCED-RISK TACTICS AND IPM SAMPLING AND MONITORING

    E-Print Network [OSTI]

    Agnello, Arthur M.

    WHOLE-FARM APPLE ARTHROPOD MANAGEMENT USING REDUCED-RISK TACTICS AND IPM SAMPLING AND MONITORING management programs in apples, using provisional action thresholds for specific major pests based on previous-farm approaches for managing the arthropod pests of apple orchards that rely on RR and OP-replacement insecticides

  13. REDUCING THE RISK FROM VOLCANO HAZARDS Lahars of Mount Pinatubo, Philippines

    E-Print Network [OSTI]

    REDUCING THE RISK FROM VOLCANO HAZARDS O Lahars of Mount Pinatubo, Philippines n June 15, 1991 Pinatubo on the island of Luzon in the Philippines, the volcano had been dormant for 500 years, allowing in the Philippines (Clark Air Base), were built on the broad gentle slopes surrounding the volcano. When Pinatubo

  14. Reducing the Risk of Rail Transport of Hazardous Materials by Route Rationalization

    E-Print Network [OSTI]

    Barkan, Christopher P.L.

    Reducing the Risk of Rail Transport of Hazardous Materials by Route Rationalization Athaphon;Kawprasert & Barkan 08-2801 2 ABSTRACT Hazardous materials traffic originates and terminates at numerous different locations throughout the North American railroad network. Rerouting of this traffic, especially

  15. Comparative Study of Station Blackout Counterpart Tests in APEX and ROSA/AP600

    SciTech Connect (OSTI)

    Lafi, Abd Y.; Reyes, Jose N. Jr. [Oregon State University (United States)

    2000-05-15

    A comparison is presented between station blackout tests conducted in both the Advanced Plant Experiment (APEX) facility and in the modified Rig of Safety Assessment (ROSA/AP600) Large-Scale Test Facility. The comparison includes the depressurization and liquid-level behavior during secondary-side blowdown, natural circulation, automatic depressurization system operation, and in-containment refueling water storage tank injection. Reasonable agreement between the test results from APEX NRC-2 and ROSA/AP600 AP-BO-01 has been observed with respect to the timing of depressurization and liquid draining rates. This indicates that the reduced height and pressure scaling of APEX preserves the sequence of events relative to the full-height and pressure ROSA/AP600.

  16. Risk Analysis, Vol. 31, No. 11, 2011 DOI: 10.1111/j.1539-6924.2011.01636.x Reducing the Effort to Comprehend Risk Models: Text

    E-Print Network [OSTI]

    Stølen, Ketil

    Risk Analysis, Vol. 31, No. 11, 2011 DOI: 10.1111/j.1539-6924.2011.01636.x Reducing the Effort Soldal Lund,2 and Ketil Stølen2,3 Risk analysis involves people with different roles and competences communication between stakeholders involved in the various stages of risk analysis. This article reports

  17. Light Water Reactor Sustainability Program: Analysis of Pressurized Water Reactor Station Blackout caused by external flooding using the RISMC toolkit

    SciTech Connect (OSTI)

    Mandelli, Diego; Smith, Curtis; Prescott, Steven; Alfonsi, Andrea; Rabiti, Cristian; Cogliati, Joshua; Kinoshita, Robert

    2014-08-01

    The existing fleet of nuclear power plants is in the process of extending its lifetime and increasing the power generated from these plants via power uprates. In order to evaluate the impacts of these two factors on the safety of the plant, the Risk Informed Safety Margin Characterization project aims to provide insights to decision makers through a series of simulations of the plant dynamics for different initial conditions (e.g., probabilistic analysis and uncertainty quantification). This paper focuses on the impacts of power uprate on the safety margin of a boiling water reactor for a flooding induced station black-out event. Analysis is performed by using a combination of thermal-hydraulic codes and a stochastic analysis tool currently under development at the Idaho National Laboratory, i.e. RAVEN. We employed both classical statistical tools, i.e. Monte-Carlo, and more advanced machine learning based algorithms to perform uncertainty quantification in order to quantify changes in system performance and limitations as a consequence of power uprate. Results obtained give a detailed investigation of the issues associated with a plant power uprate including the effects of station black-out accident scenarios. We were able to quantify how the timing of specific events was impacted by a higher nominal reactor core power. Such safety insights can provide useful information to the decision makers to perform risk informed margins management.

  18. Reproducing continuous radio blackout using glow discharge plasma

    SciTech Connect (OSTI)

    Xie, Kai; Li, Xiaoping; Liu, Donglin; Shao, Mingxu [School of Aerospace Science and Technology, Xidian University, Xi'an 710071 (China)] [School of Aerospace Science and Technology, Xidian University, Xi'an 710071 (China); Zhang, Hanlu [School of Communication and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121 (China)] [School of Communication and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121 (China)

    2013-10-15

    A novel plasma generator is described that offers large-scale, continuous, non-magnetized plasma with a 30-cm-diameter hollow structure, which provides a path for an electromagnetic wave. The plasma is excited by a low-pressure glow discharge, with varying electron densities ranging from 10{sup 9} to 2.5 × 10{sup 11} cm{sup ?3}. An electromagnetic wave propagation experiment reproduced a continuous radio blackout in UHF-, L-, and S-bands. The results are consistent with theoretical expectations. The proposed method is suitable in simulating a plasma sheath, and in researching communications, navigation, electromagnetic mitigations, and antenna compensation in plasma sheaths.

  19. Thermohydraulic and Safety Analysis for CARR Under Station Blackout Accident

    SciTech Connect (OSTI)

    Wenxi Tian; Suizheng Qiu; Guanghui Su; Dounan Jia [Xi'an Jiaotong University, 28 Xianning Road, Xi'an 710049 (China); Xingmin Liu - China Institute of Atomic Energy

    2006-07-01

    A thermohydraulic and safety analysis code (TSACC) has been developed using Fortran 90 language to evaluate the transient thermohydraulic behaviors and safety characteristics of the China Advanced Research Reactor(CARR) under Station Blackout Accident(SBA). For the development of TSACC, a series of corresponding mathematical and physical models were considered. Point reactor neutron kinetics model was adopted for solving reactor power. All possible flow and heat transfer conditions under station blackout accident were considered and the optional models were supplied. The usual Finite Difference Method (FDM) was abandoned and a new model was adopted to evaluate the temperature field of core plate type fuel element. A new simple and convenient equation was proposed for the resolution of the transient behaviors of the main pump instead of the complicated four-quadrant model. Gear method and Adams method were adopted alternately for a better solution to the stiff differential equations describing the dynamic behaviors of the CARR. The computational result of TSACC showed the enough safety margin of CARR under SBA. For the purpose of Verification and Validation (V and V), the simulated results of TSACC were compared with those of Relap5/Mdo3. The V and V result indicated a good agreement between the results by the two codes. Because of the adoption of modular programming techniques, this analysis code is expected to be applied to other reactors by easily modifying the corresponding function modules. (authors)

  20. Simulating Pelletization Strategies to Reduce the Biomass Supply Risk at America’s Biorefineries

    SciTech Connect (OSTI)

    Jacob J. Jacobson; Shane Carnohan; Andrew Ford; Allyson Beall

    2014-07-01

    Demand for cellulosic ethanol and other advanced biofuels has been on the rise, due in part to federal targets enacted in 2005 and extended in 2007. The industry faces major challenges in meeting these worthwhile and ambitious targets. The challenges are especially severe in the logistics of timely feedstock delivery to biorefineries. Logistical difficulties arise from seasonal production that forces the biomass to be stored in uncontrolled field-side environments. In this storage format physical difficulties arise; transportation is hindered by the low bulk density of baled biomass and the unprotected material can decay leading to unpredictable losses. Additionally, uncertain yields and contractual difficulties can exacerbate these challenges making biorefineries a high-risk venture. Investors’ risk could limit business entry and prevent America from reaching the targets. This paper explores pelletizer strategies to convert the lignocellulosic biomass into a denser form more suitable for storage. The densification of biomass would reduce supply risks, and the new system would outperform conventional biorefinery supply systems. Pelletizer strategies exhibit somewhat higher costs, but the reduction in risk is well worth the extra cost if America is to grow the advanced biofuels industry in a sustainable manner.

  1. Potential failure of steam generator tubes following a station blackout

    SciTech Connect (OSTI)

    Ward, L.W.; Palmrose, D.E.

    1994-12-31

    The U.S. Nuclear Regulatory Commission is considering changes to pressurized water reactor (PWR) requirements relating to steam generator tube plugging and repair criteria, including leakage monitoring. The proposed changes are known as the alternate tube plugging criteria (APC) and are intended to permit PWRs to operate with through-wall cracks in steam generator tubes subject to meeting a specified limit on predicted primary to secondary leakage under accident conditions. To assess the consequences of the alternate plugging criteria, analyses were performed for a station blackout sequence in which the reactor core melts while the reactor coolant system (RCS) remains at high pressure. Evaluations were conducted to investigate the potential for tube failure with and without secondary system depressurization. The excessive heat coupled with the high-pressure differentials across the steam generator tubes could result in creep rupture failure of the tubes during a severe accident, which could lead to a radiological release directly to the environment. In order to assess the safety significance of the APC, it is important to identify the level of steam generator tube leakage that can occur without challenging the previous study conclusions that steam generator creep failure will not occur prior to a surge line or hot-leg failure. To assess the effect of leakage on steam generator tube integrity during a core melt sequence with the RCS at high pressure and the secondary side of the steam generators pressurized and depressurized, an analysis was performed for a core melt event resulting from an unmitigated station blackout to identify the total steamenerator and tube leakage flow rates that could induce tube ruptures prior to other RCS boudary faliures that could depressurize the RCS.

  2. Blackout 2003: U.S. - Canada Task Force Presents Final Report...

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

    Natural Resources Canada, released the Final Report of the U.S. -Canada Power System Outage Task Force. U.S. - Canada Task Force Presents Final Report on Blackout of August 2003...

  3. Advanced fault diagnosis techniques and their role in preventing cascading blackouts 

    E-Print Network [OSTI]

    Zhang, Nan

    2007-04-25

    /or transmission facilities may also happen before the blackouts. ? Contingency conditions: Before the blackouts, the system may be additionally weakened by unscheduled outages, such as several transmission line, transformer and generator outages due to the faults... outages is proposed. The scheme tries to precisely locate the faulted area and avoid unnecessary trip due to the hidden failure or overload. Adaptive protection schemes are introduced to coordinate the relay operations and settings with the prevailing...

  4. Evaluation of EBR-II driver-fuel elements following an unprotected station blackout accident

    SciTech Connect (OSTI)

    Chang, L.K.; Bottcher, J.H.

    1986-01-01

    One of the current design objectives for a liquid metal reactor (LMR) is the inherent shutdown-cooling capability of the reactor, such that the reactor itself can safely reduce power following a total loss of pump power without activating the reactor shutdown system (RSS). Following a loss-of-flow (LOF) accident and a failure of RSS, in EBR-II, reactor core damage and plant restartability is of considerable interest. In the LOF event, high temperature in the reactor causes negative reactivity feedback that reduces reactor power. After an accident, reactor fuel performance is one of the factors used to assess the restartability of the plant. A thermal-hydraulic-neutronic analysis was performed to determine the response of the plant and the temperature of individual subassemblies. These temperatures were then used to assess the damage to driver fuel elements caused by the station blackout accident. The maximum depth of cladding wastage from molten eutectic at temperatures >715/sup 0/C was found to be 0.0053 mm for the hottest subassembly; this value is considerably less than the 0.28 mm cladding thickness. 12 refs.

  5. National Residential Efficiency Measures Database Aimed at Reducing Risk for Residential Retrofit Industry (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-01-01

    This technical highlight describes NREL research to develop a publicly available database of energy retrofit measures containing performance characteristics and cost estimates for nearly 3,000 measures. Researchers at the U.S. Department of Energy (DOE) National Renewable Energy Laboratory (NREL) have developed the National Residential Efficiency Measures Database, a public database that characterizes the performance and costs of common residential energy efficiency measures. The data are available for use in software programs that evaluate cost-effective retrofit measures to improve the energy efficiency of residential buildings. The database provides a single, consistent source of current data for DOE and private-sector energy audit and simulation software tools and the retrofit industry. The database will reduce risk for residential retrofit industry stakeholders by providing a central, publicly vetted source of up-to-date information.

  6. Analysis of Kuosheng Station Blackout Accident Using MELCOR 1.8.4

    SciTech Connect (OSTI)

    Wang, S.-J.; Chien, C.-S.; Wang, T.-C.; Chiang, K.-S

    2000-11-15

    The MELCOR code, developed by Sandia National Laboratories, is a fully integrated, relatively fast-running code that models the progression of severe accidents in commercial light water nuclear power plants (NPPs).A specific station blackout (SBO) accident for Kuosheng (BWR-6) NPP is simulated using the MELCOR 1.8.4 code. The MELCOR input deck for Kuosheng NPP is established based on Kuosheng NPP design data and the MELCOR users' guides. The initial steady-state conditions are generated with a developed self-initialization algorithm. The main severe accident phenomena and the fission product release fractions associated with the SBO accident were simulated. The predicted results are plausible and as expected in light of current understanding of severe accident phenomena. The uncertainty of this analysis is briefly discussed. The important features of the MELCOR 1.8.4 are described. The estimated results provide useful information for the probabilistic risk assessment (PRA) of Kuosheng NPP. This tool will be applied to the PRA, the severe accident analysis, and the severe accident management study of Kuosheng NPP in the near future.

  7. Analysis of core uncovery time in Kuosheng station blackout transient with MELCOR

    SciTech Connect (OSTI)

    Wang, S.J.; Chien, C.S. [Inst. of Nuclear Energy Research, Lungtan (Taiwan, Province of China)

    1996-02-01

    The MELCOR code, developed by the Sandia National Laboratories, is capable of simulating severe accident phenomena of nuclear power plants. Core uncovery time is an important parameter in the probabilistic risk assessment. However, many MELCOR users do not generate the initial conditions in a station blackout (SBO) transient analysis. Thus, achieving reliable core uncovery time is difficult. The core uncovery time for the Kuosheng nuclear power plant during an SBO transient is analyzed. First, full-power steady-state conditions are generated with the application of a developed self-initialization algorithm. Then the response of the SBO transient up to core uncovery is simulated. The effects of key parameters including the initialization process and the reactor feed pump (RFP) coastdown time on the core uncovery time are analyzed. The initialization process is the most important parameter that affects the core uncovery time. Because SBO transient analysis, the correct initial conditions must be generated to achieve a reliable core uncovery time. The core uncovery time is also sensitive to the RFP coastdown time. A correct time constant is required.

  8. Planning for the Next Blackout: Optimizing the Use of Distributed Energy Resources

    SciTech Connect (OSTI)

    Glickman, Joan A.; Herrera, Shawn; Kline, Keith F.; Warwick, William M.

    2004-12-01

    Given recent blackouts and concerns of terrorist attacks, some public and private organizations are taking steps to produce their own heating, cooling, and power in the event of future, potentially prolonged, outages. For example, military installations, such as Fort Bragg in North Carolina, and the Marine Task Force Training Command in Twentynine Palms, California, turned to combined heat and power and other distributed energy technologies to reduce costs and simultaneously manage their energy and reliability needs. While these individual efforts can help ensure reliability for these facilities, public policies continue to discourage most individual public and private entities from making such investments. As a result, communities across the country are not adequately prepared to protect human health and ensure safety in the event of a prolonged emergency. Significant cost savings and social benefits can accrue if parties interested in emergency preparedness, energy efficiency, and environmentally preferred technologies, come together to identify and implement win-win solutions. This paper offers recommendations to help federal, state, and local governments, along with utilities, jointly plan and invest in cleaner distributed energy technologies to address growing reliability needs as well as environmental and emergency preparedness concerns.

  9. Alternatives for reducing the environmental risks associated with natural disasters and their effects on pipelines 

    E-Print Network [OSTI]

    Wellborn, Michael Wayne

    1996-01-01

    Past pipeline failure reports have typically focused on corrosion and third party related events. However, natural disasters pose a substantial risk to pipeline integrity as well. Therefore, it was the objective of this thesis to analyze the risks...

  10. Data Management Issues Associated with the August 14, 2003 Blackout Investigation

    SciTech Connect (OSTI)

    Dagle, Jeffery E.

    2004-06-10

    The largest blackout in the history of the North American electric power grid occurred on August 14, 2003. An extensive investigation into what happened (and why) began immediately. The joint U.S.-Canada task force led the effort, including support from the electric utility industry and several federal agencies, e.g. the U.S. Department of Energy. The North American Electric Reliability Council (NERC) supported the task force, including particularly the electricity working group. The overall blackout investigation team drew expertise from a large number of organizations, assembled into teams to address specific attributes of the blackout. This paper describes the data management issues associated with supporting the blackout investigation, beginning with the immediate response in the days and weeks following the blackout, supporting the interim report [1], to the long-term plans for deriving lessons learned for implementing improvements in the overall process of outage disturbance reporting. The sole focus of this paper is the electricity working group activities at NERC; the security and nuclear working groups are outside the scope of this paper.

  11. Reducing Software Failures: Addressing the Ethical Risks of the Software Development By Don Gotterbarn

    E-Print Network [OSTI]

    De Montfort University

    the scope of risks antic ipated. Software Quality and its Risks The primary goal of software developers is the production of quality systems that meet the needs of the user. "Software quality" is defined in terms. To meet the goal of quality software, developers focus on particular risks including: project and schedule

  12. Hawaii International Conference on System Science, January 2004, Hawaii, copyright 2004 IEEE Dynamical and probabilistic approaches to the study of blackout vulnerability of the

    E-Print Network [OSTI]

    Dynamical and probabilistic approaches to the study of blackout vulnerability of the power transmission grid to a similar characterization for power transmission system blackouts are identified in the OPA dynamical model of series of blackouts. The comparison between the CASCADE and OPA models yields parameters that can

  13. Reply to comment by D. A. Hansen et al. on ``The 2003 North American electrical blackout: An accidental experiment in atmospheric

    E-Print Network [OSTI]

    Stehr, Jeffrey

    Reply to comment by D. A. Hansen et al. on ``The 2003 North American electrical blackout), Reply to comment by D. A. Hansen et al. on ``The 2003 North American electrical blackout: An accidental blackout: An accidental experiment in atmospheric chemistry'' and ap- preciate the opportunity to expand

  14. Hawaii International Conference on System Sciences, January 2002, Hawaii. c 2002 IEEE. Examining criticality of blackouts in power system models with cascading events

    E-Print Network [OSTI]

    criticality of blackouts in power system models with cascading events I. Dobson ECE Department Univ As power system loading increases, larger blackouts due to cascading outages become more likely. We investigate a critical loading at which the average size of blackouts in- creases sharply to examine whether

  15. Hawaii International Conference on System Sciences, January 2001, Maui, Hawaii. c 2001 IEEE An initial model for complex dynamics in electric power system blackouts

    E-Print Network [OSTI]

    Newman, David

    An initial model for complex dynamics in electric power system blackouts I. Dobson ECE Department University of electric power transmission system blackouts. The model describes opposing forces which have been conjectured to cause self-organized criticality in power system blackouts. There is a slow time scale

  16. Utility perspective on station blackout rule implementation with NUMARC 87-00

    SciTech Connect (OSTI)

    Maracek, J.

    1990-01-01

    The development of the station blackout rule involved an unusually high level of cooperation between the industry and the Nuclear Regulatory Commission (NRC). The industry developed an approach to implementation of the rule in the form of the Nuclear Management and Resources Council's (NUMARC's) Guidelines and Technical Bases for NUMARC Initiatives Addressing Station Blackout at Light Water Reactors (NUMARC 87-00). This document was reviewed and accepted by the NRC staff as a means for meeting the requirements of the station blackout rule. Yet difficulties still arose when individual utilities used the NUMARC 87-00 approach to respond to the rule. This presentation examines the development process and subsequent difficulties and identifies potential improvements for development and implementation of new rules in the future.

  17. Applications of the RELAP5 code to the station blackout transients at the Browns Ferry Unit One Plant

    SciTech Connect (OSTI)

    Schultz, R.R.; Wagoner, S.R.

    1983-01-01

    As a part of the charter of the Severe Accident Sequence Analysis (SASA) Program, station blackout transients have been analyzed using a RELAP5 model of the Browns Ferry Unit 1 Plant. The task was conducted as a partial fulfillment of the needs of the US Nuclear Regulatory Commission in examining the Unresolved Safety Issue A-44: Station Blackout (1) the station blackout transients were examined (a) to define the equipment needed to maintain a well cooled core, (b) to determine when core uncovery would occur given equipment failure, and (c) to characterize the behavior of the vessel thermal-hydraulics during the station blackout transients (in part as the plant operator would see it). These items are discussed in the paper. Conclusions and observations specific to the station blackout are presented.

  18. Food Allergies Policy 1. Wadham College is committed to reducing the risk to members of the College community and

    E-Print Network [OSTI]

    Wallace, Mark

    1 Food Allergies Policy Policy 1. Wadham College is committed to reducing the risk to members of the College community and visitors with regard to the provision of food and the consumption of allergens in food which could lead to an allergic reaction. 2. This policy will be placed on the College's website

  19. Integrated TRAC/MELPROG analyses of a PWR station blackout

    SciTech Connect (OSTI)

    Henninger, R.; Dearing, J.F.

    1987-01-01

    The first complete, coupled, and largely mechanistic analysis of the entire reactor-coolant system during a station blackout (TMLB') core-meltdown accident has been made with MELPROG/TRAC. The calculation was initiated at the start of the transient and ended with a late recovery of cooling. Additional cooling provided by water from the primary system delayed events relative to a standalone MELPROG calculation. Natural circulation within the vessel was established and primary-relief-valve action did little to disturb this flow. In addition, it was calculated directly that the hot leg reached a failure temperature long before vessel failure. Beyond relocation of the core, we have calculated the boiloff of the water in the lower head and have estimated the time of vessel failure to be at about 14,700 s into the transient. For ''nominal'' corium-water heat transfer, the boiloff process (steam-production rate) is slow enough that the relief valves prevent pressurization beyond 17.5 MPa. Parametric cases with increased corium-water heat transfer resulted in steaming rates beyond the capability of the relief valves, leading to pressures in excess of 19.2 MPa. Natural convection flow around the loop, if started by removing the water in the loop seal, was blocked by a relatively less-dense hydrogen/steam mixture that flowed to the top of the steam generator. Emergency core-cooling system activation late in the transient (after core slump) resulted in rapid cooling of the periphery of the debris region but slower cooling in the interior regions because of poor water penetration.

  20. Enhancement of NRC station blackout requirements for nuclear power plants

    SciTech Connect (OSTI)

    McConnell, M. W.

    2012-07-01

    The U.S. Nuclear Regulatory Commission (NRC) established a Near-Term Task Force (NTTF) in response to Commission direction to conduct a systematic and methodical review of NRC processes and regulations to determine whether the agency should make additional improvements to its regulatory system and to make recommendations to the Commission for its policy direction, in light of the accident at the Fukushima Dai-ichi Nuclear Power Plant. The NTTF's review resulted in a set of recommendations that took a balanced approach to defense-in-depth as applied to low-likelihood, high-consequence events such as prolonged station blackout (SBO) resulting from severe natural phenomena. Part 50, Section 63, of Title 10 of the Code of Federal Regulations (CFR), 'Loss of All Alternating Current Power,' currently requires that each nuclear power plant must be able to cool the reactor core and maintain containment integrity for a specified duration of an SBO. The SBO duration and mitigation strategy for each nuclear power plant is site specific and is based on the robustness of the local transmission system and the transmission system operator's capability to restore offsite power to the nuclear power plant. With regard to SBO, the NTTF recommended that the NRC strengthen SBO mitigation capability at all operating and new reactors for design-basis and beyond-design-basis external events. The NTTF also recommended strengthening emergency preparedness for prolonged SBO and multi-unit events. These recommendations, taken together, are intended to clarify and strengthen US nuclear reactor safety regarding protection against and mitigation of the consequences of natural disasters and emergency preparedness during SBO. The focus of this paper is on the existing SBO requirements and NRC initiatives to strengthen SBO capability at all operating and new reactors to address prolonged SBO stemming from design-basis and beyond-design-basis external events. The NRC initiatives are intended to enhance core and spent fuel pool cooling, reactor coolant system integrity, and containment integrity. (authors)

  1. The response of BWR Mark II containments to station blackout severe accident sequences

    SciTech Connect (OSTI)

    Greene, S.R.; Hodge, S.A.; Hyman, C.R.; Tobias, M.L. (Oak Ridge National Lab., TN (USA))

    1991-05-01

    This report describes the results of a series of calculations conducted to investigate the response of BWR Mark 2 containments to short-term and long-term station blackout severe accident sequences. The BWR-LTAS, BWRSAR, and MELCOR codes were employed to conduct quantitative accident sequence progression and containment response analyses for several station blackout scenarios. The accident mitigation effectiveness of automatic depressurization system actuation, drywell flooding via containment spray operation, and debris quenching in Mark 2 suppression pools is assessed. 27 refs., 16 figs., 21 tabs.

  2. Smaller loads reduce risk of back injuries during wine grape harvest

    E-Print Network [OSTI]

    2006-01-01

    of manual lifting tasks. Ergonomics 36(7):749-76. Waters T,back disorder risk. Ergonomics Meyers J, Miles J, Faucett J,field work: Vineyard ergonomics. J Agromed 8(1):37-52. [NRC-

  3. Parasites can simplify host-population dynamics and reduce extinction risk

    E-Print Network [OSTI]

    Lively, Curt

    and the effective population size (Ne) as measures of host extinction risk. Ranges of key variables: Per capita parameters, with the fitness cost being density-independent, density-dependent, or both. Conclusions

  4. Reducing the risks of telehealthcare expansion through the automation of efficiency evaluation 

    E-Print Network [OSTI]

    Alexandru, Cristina Adriana

    2015-06-29

    Several European countries, including the UK, are investing in large-scale telehealthcare pilots, to thoroughly evaluate the benefits of telehealthcare. Due to the high level of risk associated with such projects, it ...

  5. Pharmacological Chaperone Design for Reducing Risk Factor of Parkinson’s Disease from Traditional Chinese Medicine

    E-Print Network [OSTI]

    Huang, Hung-Jin

    Dysfunction of ?-glucocerebrosidase (GCase) has no hydrolytic activity in patients of Gaucher's disease and increasing the risk factor for Parkinson’s disease occurrence. Pharmacological chaperone design has been used to ...

  6. SOARCA Peach Bottom Atomic Power Station Long-Term Station Blackout Uncertainty Analysis: Convergence of the Uncertainty Results

    SciTech Connect (OSTI)

    Bixler, Nathan E.; Osborn, Douglas M.; Sallaberry, Cedric Jean-Marie; Eckert-Gallup, Aubrey Celia; Mattie, Patrick D.; Ghosh, S. Tina

    2014-02-01

    This paper describes the convergence of MELCOR Accident Consequence Code System, Version 2 (MACCS2) probabilistic results of offsite consequences for the uncertainty analysis of the State-of-the-Art Reactor Consequence Analyses (SOARCA) unmitigated long-term station blackout scenario at the Peach Bottom Atomic Power Station. The consequence metrics evaluated are individual latent-cancer fatality (LCF) risk and individual early fatality risk. Consequence results are presented as conditional risk (i.e., assuming the accident occurs, risk per event) to individuals of the public as a result of the accident. In order to verify convergence for this uncertainty analysis, as recommended by the Nuclear Regulatory Commission’s Advisory Committee on Reactor Safeguards, a ‘high’ source term from the original population of Monte Carlo runs has been selected to be used for: (1) a study of the distribution of consequence results stemming solely from epistemic uncertainty in the MACCS2 parameters (i.e., separating the effect from the source term uncertainty), and (2) a comparison between Simple Random Sampling (SRS) and Latin Hypercube Sampling (LHS) in order to validate the original results obtained with LHS. Three replicates (each using a different random seed) of size 1,000 each using LHS and another set of three replicates of size 1,000 using SRS are analyzed. The results show that the LCF risk results are well converged with either LHS or SRS sampling. The early fatality risk results are less well converged at radial distances beyond 2 miles, and this is expected due to the sparse data (predominance of “zero” results).

  7. SCDAP severe core-damage studies: BWR ATWS and PWR station blackout

    SciTech Connect (OSTI)

    Laats, E.T.; Chambers, R.; Driskell, W.E.

    1983-01-01

    The Severe Accident Sequence Analysis (SASA) Program, sponsored by the US Nuclear Regulatory Commission (NRC), is addressing a number of accident scenarios that potentially pose a health hazard to the public. Two of the scenarios being analyzed in detail at the Idaho National Engineering Laboratory (INEL) are the station blackout at the Bellefonte nuclear plant and the anticipated transient without scram (ATWS) at the Browns Ferry-1 plant. The INEL analyses of the station blackout and ATWS have been divided into four parts, which represent the sequence being followed in this study. First, the evaluation of long term irradiation effects prior to the station blackout or ATWS was conducted using the FRAPCON-2 fuel rod behavior code; second, the reactor primary and secondary coolant system behavior is being analyzed with the RELAP5 code; third, the degradation of the core is being analyzed with the SCDAP code; and finally, the containment building response is being analyzed with the CONTEMPT code. This paper addresses only the SCDAP/MODO degraded core analyses for both the station blackout and ATWS scenarios.

  8. Recovery sequences for a station blackout accident at the Grand Gulf Nuclear Station

    SciTech Connect (OSTI)

    Carbajo, J.J. [Martin Marietta Energy Systems, Oak Ridge, TN (United States)

    1995-12-31

    Recovery sequences for a low-pressure, short term, station blackout severe accident at the Grand Gulf power plant have been investigated using the computer code MELCOR, version 1.8.3 PN. This paper investigates the effect of reflood timing and mass flow rate on accident recovery.

  9. RELAP5/MOD3 simulation of the station blackout experiment conducted at the IIST facility

    SciTech Connect (OSTI)

    Ferng, Y.M.; Liu, T.J.; Lee, C.H. [Inst. of Nuclear Energy Research, Lung-Tan (Taiwan, Province of China)

    1996-10-01

    Thermal-hydraulic responses in the station blackout experiment conducted at the IIST facility are simulated through the use of the advanced system code RELAP5/MOD3. Typical behaviors occurring in the IIST station blackout transient are characterized by secondary boiloff, primary saturation and pressurization, and subsequent core uncovery and heatup. As the coolant inventory within the steam generator secondary system boils dry, the primary system pressure increases as a result of degradation of the heat removal ability of the steam generator secondary side. This pressurization phenomenon causes the pressurizer safety valve to open and the primary coolant to deplete through the valve, causing the core to eventually become uncovered. The same response can be exactly simulated by the current model. The current calculated results show fairly good agreement with the experimental data, but the timing of the events occurring in the station blackout transient is calculated earlier than the measured value. The overall comparison of key parameters between the calculated results and IIST test data, however, reveals that the current RELAP5/MOD3 model can provide reasonable station blackout modeling for simulating long-term system behavior.

  10. A Probabilistic Model for the Dynamics of Cascading Failures and Blackouts in Power Grids

    E-Print Network [OSTI]

    Hayat, Majeed M.

    cause failures of power system components such as transmission lines and generators, which, in turn, may1 A Probabilistic Model for the Dynamics of Cascading Failures and Blackouts in Power Grids Mahshid Abstract--Current power grids suffer periodic disturbances that may trigger cascades of component failures

  11. Blackouts Are Inevitable Coping, Not Prevention, Should Be the Primary Goal

    E-Print Network [OSTI]

    . In a large, complicated arrangement such as our system for generating, transmitting and distributing and could even be counterproductive, causing future failures because of some unanticipated interaction blackouts. When hurricanes, tornadoes, ice storms or other problems black out the system, backup generators

  12. Strategic Industrial Energy Efficiency: Reduce Expenses, Build Revenues, and Control Risk 

    E-Print Network [OSTI]

    Russell, C.

    2004-01-01

    Some manufacturing companies successfully boost their financial performance through optimized energy use. This leads not only to reduced energy consumption and associated environmental benefits, but also to capacity improvements that generate...

  13. STEAM LINE BREAK AND STATION BLACKOUT TRANSIENTS FOR PROLIFERATION RESISTANT HEXAGONAL TIGHT LATTICE BWR.

    SciTech Connect (OSTI)

    ROHATGI,U.S.; JO,J.; CHUNG,B.D.; TAKAHASHI,H.

    2002-06-09

    Safety analyses of a proliferation resistant, economically competitive, high conversion, boiling water reactor (HCBWR) fueled with fissile plutonium and fertile thorium oxide fuel elements, and with passive safety systems are presented here. The HCBWR developed here is characterized by a very tight lattice with a relatively small water volume fraction in the core which therefore operates with a fast reactor neutron spectrum, and a considerably improved neutron economy compared to the current generation of Light Water Reactors. The tight lattice core has a very narrow flow channels with a hydraulic diameter less than half of the regular BWR core and, thus, presents a special challenge to core cooling, because of reduced water inventory and high friction in the core. The primary safety concern when reducing the moderator to fuel ratio and when using a tightly packed lattice arrangement is to maintain adequate cooling of the core during both normal operation and accident scenarios. In the preliminary HCBWR design, the core has been placed in a vessel with a large chimney section, and the vessel is connected with Isolation Condenser System (ICs). The vessel is placed in containment with Gravity Driven Cooling System (GDCS) and Passive Containment Cooling System (PCCS) in a configuration similar to General Electric's Simplified Boiling Water Reactor (SBWR). The safety systems are similar to SBWR; ICs and PCCS are scaled with power. An internal recirculation pump was placed in the downcomer to augment the buoyancy head provided by the chimney, since the buoyancy provided by the chimney alone could not generate sufficient recirculation in the vessel as the tight lattice configuration resulted in much larger friction in the core than the SBWR. The constitutive relationships for RELAP5 were assessed for narrow channels, and as a result the heat transfer package was modified. The modified RELAP5 was used to simulate and analyze two of the most limiting events for a tight pitch lattice core: the Station Blackout and the Main Steam Line Break events. The results of the analyses indicate that the HCBWR system will be safely brought to the shutdown condition for these transients.

  14. Steam Line Break and Station Blackout Transients for Proliferation Resistant Hexagonal Tight Lattice BWR

    SciTech Connect (OSTI)

    Upendra Rohatgi; Jae Jo; Bub Dong Chung; Hiroshi Takahashi [Brookhaven National Laboratory, Energy Sciences and Technology Department, Upton, New York 11973 (United States); Downar, T.J. [Purdue University, School of Nuclear Engineering, West Lafayette, IN 47906-1290 (United States)

    2002-07-01

    Safety analyses of a proliferation resistant, economically competitive, high conversion, boiling water reactor (HCBWR) fueled with fissile plutonium and fertile thorium oxide fuel elements, and with passive safety systems are presented here. The HCBWR developed here is characterized by a very tight lattice with a relatively small water volume fraction in the core which therefore operates with a fast reactor neutron spectrum, and a considerably improved neutron economy compared to the current generation of Light Water Reactors. A tight lattice BWR core has very narrow flow channels with a hydraulic diameter less than half of the regular BWR core. The tight lattice core presented a special challenge to core cooling, because of reduced water inventory and high friction in the core. The primary safety concern when reducing the moderator to fuel ratio and when using a tightly packed lattice arrangement is to maintain adequate cooling of the core during both normal operation and accident scenarios. In the preliminary HCBWR design, the core has been placed in a vessel with a large chimney section, and the vessel is connected with an Isolation Cooling System (ICS). The vessel is placed in a containment with a Gravity Driven Cooling System (GDCS) and a Passive Containment Cooling System (PCCS) in a configuration similar to General Electric's (GE) Simplified Boiling Water Reactor (SBWR). The safety systems are similar to the SBWR; the ICS and PCCS are scaled with power. An internal recirculation pump was placed in the downcomer to augment the buoyancy head provided by the chimney. The buoyancy provided by the chimney alone could not generate sufficient recirculation in the vessel since the tight lattice configuration resulted in much larger friction in the core than the SBWR. A modified RELAP5 Code was used to simulate and analyze two of the most limiting events for a tight pitch lattice core: the Station Blackout and the Main Steam Line Break events. The constitutive relationships for RELAP5 were compared with the correlations and the data available for narrow channels, and the heat transfer package was modified for narrow channel application. The results of the analyses indicate that the HCBWR system will be safely shutdown for these transients. (authors)

  15. APPLICATION OF CHEMICALLY ACCELERATED BIOTREATMENT TO REDUCE RISK IN OIL-IMPACTED SOILS

    SciTech Connect (OSTI)

    J.R. Paterek; W.W. Bogan; L.M. Lahner; V. Trbovic; E. Korach

    2001-05-01

    The overall program objective is to develop and evaluate integrated biological/physical/chemical co-treatment strategies for the remediation of wastes associated with the exploration and production of fossil energy. The specific objectives of this project are: chemical accelerated biotreatment (CAB) technology development for enhanced site remediation, application of the risk based analyses to define and support the rationale for environmental acceptable endpoints (EAE) for exploration and production wastes, and evaluate both the technological technologies in conjugation for effective remediation of hydrocarbon contaminated soils from E&P sites in the USA.

  16. Comparing Simulation Results with Traditional PRA Model on a Boiling Water Reactor Station Blackout Case Study

    SciTech Connect (OSTI)

    Zhegang Ma; Diego Mandelli; Curtis Smith

    2011-07-01

    A previous study used RELAP and RAVEN to conduct a boiling water reactor station black-out (SBO) case study in a simulation based environment to show the capabilities of the risk-informed safety margin characterization methodology. This report compares the RELAP/RAVEN simulation results with traditional PRA model results. The RELAP/RAVEN simulation run results were reviewed for their input parameters and output results. The input parameters for each simulation run include various timing information such as diesel generator or offsite power recovery time, Safety Relief Valve stuck open time, High Pressure Core Injection or Reactor Core Isolation Cooling fail to run time, extended core cooling operation time, depressurization delay time, and firewater injection time. The output results include the maximum fuel clad temperature, the outcome, and the simulation end time. A traditional SBO PRA model in this report contains four event trees that are linked together with the transferring feature in SAPHIRE software. Unlike the usual Level 1 PRA quantification process in which only core damage sequences are quantified, this report quantifies all SBO sequences, whether they are core damage sequences or success (i.e., non core damage) sequences, in order to provide a full comparison with the simulation results. Three different approaches were used to solve event tree top events and quantify the SBO sequences: “W” process flag, default process flag without proper adjustment, and default process flag with adjustment to account for the success branch probabilities. Without post-processing, the first two approaches yield incorrect results with a total conditional probability greater than 1.0. The last approach accounts for the success branch probabilities and provides correct conditional sequence probabilities that are to be used for comparison. To better compare the results from the PRA model and the simulation runs, a simplified SBO event tree was developed with only four top events and eighteen SBO sequences (versus fifty-four SBO sequences in the original SBO model). The estimated SBO sequence conditional probabilities from the original SBO model were integrated to the corresponding sequences in the simplified SBO event tree. These results were then compared with the simulation run results.

  17. The Community Environmental Monitoring Program: Reducing Public Perception of Risk through Stakeholder Involvement

    SciTech Connect (OSTI)

    William T. Hartwell

    2007-05-21

    The Community Environmental Monitoring Program (CEMP) has promoted stakeholder involvement, awareness, and understanding of radiological surveillance in communities surrounding the Nevada Test Site (NTS) since 1981. It involves stakeholders in the operation, data collection, and dissemination of information obtained from a network of 29 stations across a wide area of Nevada, Utah and California. It is sponsored by the U.S. Department of Energy, National Nuclear Security Administration’s Nevada Site Office (NNSA/NSO) and administered by the Desert Research Institute (DRI) of the Nevada System of Higher Education. Integration of a near real-time communications system, a public web site, training workshops for involved stakeholders, and educational programs all help to alleviate public perception of risk of health effects from past activities conducted at the NTS.

  18. Recent blackouts in US and continental Europe: is liberalisation to blame?

    E-Print Network [OSTI]

    Bialek, Janusz

    2004-06-16

    to be self-sufficient, i.e. generation matched demand. This resulted in well developed internal transmission networks but relatively weak tie-lines linking neighbouring networks. Over time the networks started to be increasingly interconnected but those... and some early lessons to be learnt. There are several common features regarding all the recent blackouts. They were all transmission-based, i.e. there were no problems at the time with the level of generation. The systems were not stressed before...

  19. MELCOR calculations for a low-pressure short-term station blackout in a BWR-6

    SciTech Connect (OSTI)

    Carbajo, J.J. [Martin Marietta Energy Systems, Oak Ridge, TN (United States)

    1995-12-31

    A postulated, low-pressure, short term station blackout severe accident has been analyzed using the MELCOR code for the Grand Gulf nuclear power plant. Different versions have been used with three different models of the plant. This paper presents results of the effects of different plant models and versions of MELCOR on the calculated results and to present the best-estimating timing of events for this transient.

  20. The AP1000{sup R} nuclear power plant innovative features for extended station blackout mitigation

    SciTech Connect (OSTI)

    Vereb, F.; Winters, J.; Schulz, T.; Cummins, E.; Oriani, L. [Westinghouse Electric Company LLC, 1000 Westinghouse Drive, Cranberry Township, PA 16066 (United States)

    2012-07-01

    Station Blackout (SBO) is defined as 'a condition wherein a nuclear power plant sustains a loss of all offsite electric power system concurrent with turbine trip and unavailability of all onsite emergency alternating current (AC) power system. Station blackout does not include the loss of available AC power to buses fed by station batteries through inverters or by alternate AC sources as defined in this section, nor does it assume a concurrent single failure or design basis accident...' in accordance with Reference 1. In this paper, the innovative features of the AP1000 plant design are described with their operation in the scenario of an extended station blackout event. General operation of the passive safety systems are described as well as the unique features which allow the AP1000 plant to cope for at least 7 days during station blackout. Points of emphasis will include: - Passive safety system operation during SBO - 'Fail-safe' nature of key passive safety system valves; automatically places the valve in a conservatively safe alignment even in case of multiple failures in all power supply systems, including normal AC and battery backup - Passive Spent Fuel Pool cooling and makeup water supply during SBO - Robustness of AP1000 plant due to the location of key systems, structures and components required for Safe Shutdown - Diverse means of supplying makeup water to the Passive Containment Cooling System (PCS) and the Spent Fuel Pool (SFP) through use of an engineered, safety-related piping interface and portable equipment, as well as with permanently installed onsite ancillary equipment. (authors)

  1. Postmortem analysis of power grid blackouts - The role of measurement systems

    SciTech Connect (OSTI)

    Dagle, Jeffery E.

    2006-09-01

    Promptly following any blackout, an investigation is conducted to determine the who, what, where, when, why, and how. For system operators, it is important to quickly grasp the scale and magnitude of the event and rapidly restore service. Then a broader set of stakeholders get involved to assess system performance, determine root causes, compile lessons learned, and develop recommendations. At the heart of the post-mortem investigation is the detailed sequence of events. As accurately as possible, investigators need to know what happened and when. Especially during a cascading failure where events occur rapidly, accurate timing is crucial to understanding how the event unfolded so that the root causes can be determined. The sequence of events is based on vast amounts of data collected from multiple points in the system from a myriad of data collection instruments, some devoted to the purpose of supporting system disturbance post mortem analysis, others providing useful additional context or filling in missing gaps. The more that the investigators know about their available sources of data, and the inherent limitations of each, the better (and quicker) will be the analysis. This is especially important when a large blackout has occurred; there is pressure to find answers quickly, but due to the size and complexity of the event, a deliberate and methodical investigation is necessary. This article discusses the role that system monitoring plays in supporting the investigation of large-scale system disruptions and blackouts.

  2. Regulatory/backfit analysis for the resolution of Unresolved Safety Issue A-44, Station Blackout

    SciTech Connect (OSTI)

    Rubin, A.M.

    1988-06-01

    Station blackout is the complete loss of alternating current (ac) electric power to the essential and nonessential buses in a nuclear power plant; it results when both offsite power and the onsite emergency ac power systems are unavailable. Because many safety systems required for reactor core decay heat removal and containment heat removal depend on ac power, the consequences of a station blackout could be severe. Because of the concern about the frequency of loss of offsite power, the number of failures of emergency diesel generators, and the potentially severe consequences of a loss of all ac power, ''Station Blackout'' was designated as Unresolved Safety Issue (USI) A-44. This report presents the regulatory/backfit analysis for USI A-44. It includes (1) a summary of the issue, (2) the recommended technical resolution, (3) alternative resolutions considered by the Nuclear Regulatory Commission (NRC) staff, (4) an assessment of the benefits and costs of the recommended resolution, (5) the decision rationale, (6) the relationship between USI A-44 and other NRC programs and requirements, and (7) a backfit analysis demonstrating that the resolution of USI A-44 complies with the backfit rule (10 CFR 50.109).

  3. Regulatory analysis for the resolution of Unresolved Safety Issue A-44, Station Blackout. Draft report

    SciTech Connect (OSTI)

    Rubin, A.M.

    1986-01-01

    ''Station Blackout'' is the complete loss of alternating current (ac) electric power to the essential and nonessential buses in a nuclear power plant; it results when both offsite power and the onsite emergency ac power systems are unavailable. Because many safety systems required for reactor core decay heat removal and containment heat removal depend on ac power, the consequences of a station blackout could be severe. Because of the concern about the frequency of loss of offsite power, the number of failures of emergency diesel generators, and the potentially severe consequences of a loss of all ac power, ''Station Blackout'' was designated as Unresolved Safety Issue (USI) A-44. This report presents the regulatory analysis for USI A-44. It includes: (1) a summary of the issue, (2) the proposed technical resolution, (3) alternative resolutions considered by the Nuclear Regulatory Commission (NRC) staff, (4) an assessment of the benefits and costs of the recommended resolution, (5) the decision rationale, and (6) the relationship between USI A-44 and other NRC programs and requirements.

  4. Modeling Advanced Neutron Source reactor station blackout accident using RELAP5

    SciTech Connect (OSTI)

    Chen, N.C.J. (Oak Ridge National Lab., TN (USA)); Fletcher, C.D. (EG and G Idaho, Inc., Idaho Falls, ID (USA))

    1990-01-01

    The Advanced Neutron Source (ANS) system model using RELAP5 has been developed to perform loss-of-coolant accident (LOCA) and non-LOCA transients as safety-related input for early design considerations. The transients studies include LOCA, station blackout, and reactivity insertion accidents. The small-, medium-, and large-break LOCA results were presented and documented. This paper will focus on the station blackout scenario. The station blackout analyses have concentrated on thermal-hydraulic system response with and without accumulators. Five transient calculations were performed to characterize system performance using various numbers and sizes of accumulators at several key sites. The main findings will be discussed with recommendations for conceptual design considerations. ANS is a state-of-the-art research reactor to be built and operated at high heat flux, high mass flux, and high coolant subcooling. To accommodate these features, three ANS-specific changes were made in the RELAP5 code by adding: the Petukhov heat transfer correlation for single-phase forced convection in the thin coolant channel; the Gambill additive method with the Weatherhead wall superheat for the critical heat flux; and the Griffith drift flux model for the interfacial drag in the slug flow regime. 7 refs., 6 figs., 1 tab.

  5. Proliferation resistance assessments during the design phase of a recycling facility as a means of reducing proliferation risks

    SciTech Connect (OSTI)

    Lindell, M.A.; Grape, S.; Haekansson, A.; Jacobsson Svaerd, S. [Department of Physics and Astronomy, Uppsala University: Box 516, SE-75120 Uppsala (Sweden)

    2013-07-01

    The sustainability criterion for Gen IV nuclear energy systems inherently presumes the availability of efficient fuel recycling capabilities. One area for research on advanced fuel recycling concerns safeguards aspects of this type of facilities. Since a recycling facility may be considered as sensitive from a non-proliferation perspective, it is important to address these issues early in the design process, according to the principle of Safeguards By Design. Presented in this paper is a mode of procedure, where assessments of the proliferation resistance (PR) of a recycling facility for fast reactor fuel have been performed so as to identify the weakest barriers to proliferation of nuclear material. Two supplementing established methodologies have been applied; TOPS (Technological Opportunities to increase Proliferation resistance of nuclear power Systems) and PR-PP (Proliferation Resistance and Physical Protection evaluation methodology). The chosen fuel recycling facility belongs to a small Gen IV lead-cooled fast reactor system that is under study in Sweden. A schematic design of the recycling facility, where actinides are separated using solvent extraction, has been examined. The PR assessment methodologies make it possible to pinpoint areas in which the facility can be improved in order to reduce the risk of diversion. The initial facility design may then be slightly modified and/or safeguards measures may be introduced to reduce the total identified proliferation risk. After each modification of design and/or safeguards implementation, a new PR assessment of the revised system can then be carried out. This way, each modification can be evaluated and new ways to further enhance the proliferation resistance can be identified. This type of iterative procedure may support Safeguards By Design in the planning of new recycling plants and other nuclear facilities. (authors)

  6. Alvarado and Rajaraman. The 2003 Blackout: Did the System Operator Have Enough Power? page 1 Christensen Associates 4610 University Avenue, Ste. 700 Madison, WI 53705-2164 Voice 608.231.2266 Fax 608.231.2108

    E-Print Network [OSTI]

    Alvarado and Rajaraman. The 2003 Blackout: Did the System Operator Have Enough Power? page 1.231.2108 THE 2003 BLACKOUT: DID THE SYSTEM OPERATOR HAVE ENOUGH POWER? Fernando L. Alvarado (alvarado blackout are still being investigated and it is too soon to know what went wrong. From press accounts

  7. Evaluation of station blackout accidents at nuclear power plants: Technical findings related to unresolved safety issue A-44: Final report

    SciTech Connect (OSTI)

    Not Available

    1988-06-01

    ''Station Blackout,'' which is the complete loss of alternating current (AC) electrical power in a nuclear power plant, has been designated as Unresolved Safety Issue A-44. Because many safety systems required for reactor core decay heat removal and containment heat removal depend on AC power, the consequences of a station blackout could be severe. This report documents the findings of technical studies performed as part of the program to resolve this issue. The important factors analyzed include: the fequency of loss of offsite power; the probability that emergency or onsite AC power supplies would be unavailable; the capability and reliability of decay heat removal systems independent of AC power; and the likelihood that offsite power would be restored before systems that cannot operate for extended periods without AC power fail, thus resulting in core damage. This report also addresses effects of different designs, locations, and operational features on the estimated frequency of core damage resulting from station blackout events.

  8. Containment pressurization and burning of combustible gases in a large, dry PWR containment during a station blackout sequence

    SciTech Connect (OSTI)

    Lee, M.; Fan, C.T. (National Tsing-Hua Univ., Dept. of Nuclear Engineering, Hsinchu (TW))

    1992-07-01

    In this paper, responses of a large, dry pressurized water reactor (PWR) containment in a station blackout sequence are analyzed with the CONTAIN, MARCH3, and MAAP codes. Results show that the predicted containment responses in a station blackout sequence of these three codes are substantially different. Among these predictions, the MAAP code predicts the highest containment pressure because of the large amount of water made available to quench the debris upon vessel failure. The gradual water boiloff by debris pressurizes the containment. The combustible gas burning models in these codes are briefly described and compared.

  9. Analysis of Potential Hydrogen Risk in the PWR Containment

    SciTech Connect (OSTI)

    Deng Jian; Xuewu Cao [Shanghai Jiaotong University, Shanghai (China)

    2006-07-01

    Various studies have shown that hydrogen combustion is one of major risk contributors to threaten the integrity of the containment in a nuclear power plant. That hydrogen risk should be considered in severe accident strategies in current and future NPPs has been emphasized in the latest policies issued by the National Nuclear Safety Administration of China (NNSA). According to a deterministic approach, three typical severe accident sequences for a PWR large dry containment, such as the large break loss-of-coolant (LLOCA), the station blackout (SBO), and the small break loss-of-coolant (SLOCA) are analyzed in this paper with MELCOR code. Hydrogen concentrations in different compartments are observed to evaluate the potential hydrogen risk. The results show that there is a great amount of hydrogen released into the containment, which causes the containment pressure to increase and some potential in-consecutive burning. Therefore, certain hydrogen management strategies should be considered to reduce the risk to threaten the containment integrity. (authors)

  10. Blackout: coal, climate and the last energy crisis

    SciTech Connect (OSTI)

    Heinberg, R. [Post Carbon Institute in California, CA (United States)

    2009-07-15

    Coal fuels more than 30 per cent of UK electricity production, and about 50 per cent in the US, providing a significant portion of total energy output. China and India's recent ferocious economic growth has been based almost entirely on coal-generated electricity. Coal currently looks like a solution to many of our fast-growing energy problems. However, while coal advocates are urging us full steam ahead, the increasing reliance on this dirtiest of all fossil fuels has crucial implications for energy policy, pollution levels, the global climate, world economy and geopolitics. Drawbacks to a coal-based energy strategy include: Scarcity - new studies suggest that the peak of world coal production may actually be less than two decades away; Cost - the quality of produced coal is declining, while the expense of transportation is rising, leading to spiralling costs and increasing shortages; and, Climate impacts - our ability to deal with the historic challenge of climate change may hinge on reducing coal consumption in future years.

  11. Cooperative measures to support the Indo-Pak Agreement Reducing Risk from Accidents Relating to Nuclear Weapons.

    SciTech Connect (OSTI)

    Mishra, Sitakanta; Ahmed, Mansoor

    2014-04-01

    In 2012, India and Pakistan reaffirmed the Agreement on Reducing the Risk from Accidents Relating to Nuclear Weapons. Despite a history of mutual animosity and persistent conflict between the two countries, this agreement derives strength from a few successful nuclear confidence building measures that have stood the test of time. It also rests on the hope that the region would be spared a nuclear holocaust from an accidental nuclear weapon detonation that might be misconstrued as a deliberate use of a weapon by the other side. This study brings together two emerging strategic analysts from South Asia to explore measures to support the Agreement and further develop cooperation around this critical issue. This study briefly dwells upon the strategic landscape of nuclear South Asia with the respective nuclear force management structures, doctrines, and postures of India and Pakistan. It outlines the measures in place for the physical protection and safety of nuclear warheads, nuclear materials, and command and control mechanisms in the two countries, and it goes on to identify the prominent, emerging challenges posed by the introduction of new weapon technologies and modernization of the respective strategic forces. This is followed by an analysis of the agreement itself leading up to a proposed framework for cooperative measures that might enhance the spirit and implementation of the agreement.

  12. Hawaii International Conference on System Science, January 2003, Hawaii, 2003 IEEE Blackout Mitigation Assessment in Power Transmission Systems

    E-Print Network [OSTI]

    Newman, David

    @engr.wisc.edu Abstract Electric power transmission systems are a key infrastructure and blackouts of these systems have by the dynamics. 1. Introduction Electric power transmission systems are an important element of the national Mitigation Assessment in Power Transmission Systems B. A. Carreras Oak Ridge National Laboratory, Oak Ridge

  13. Forum: Let there be light Jay Apt and Lester Lave say power blackouts are too frequent, dangerous

    E-Print Network [OSTI]

    Forum: Let there be light Jay Apt and Lester Lave say power blackouts are too frequent, dangerous blamed the pilot -- for inadequate training, not inspecting the aircraft thoroughly, flying in dangerous conditions or not reacting properly to the danger. Rather than have many erring pilots and dead passengers

  14. Common CX3CR1 alleles are associated with a reduced risk of headaches Short title: CX3CR1 gene polymorphisms and headaches

    E-Print Network [OSTI]

    Boyer, Edmond

    Common CX3CR1 alleles are associated with a reduced risk of headaches Short title: CX3CR1 gene Objectives: The aim of this study was to investigate the role of the chemokine receptor CX3CR1 in headaches and migraine. Methods: Distribution of two polymorphisms of the chemokine receptor CX3CR1 (V249I and T280M

  15. ESBWR response to an extended station blackout/loss of all AC power

    SciTech Connect (OSTI)

    Barrett, A. J.; Marquino, W. [New Plants Engineering, GE Hitachi Nuclear Energy, M/CA 75, 3901 Castle Hayne Road, Wilmington, NC 28402 (United States)

    2012-07-01

    U.S. federal regulations require light water cooled nuclear power plants to cope with Station Blackouts for a predetermined amount of time based on design factors for the plant. U.S. regulations define Station Blackout (SBO) as a loss of the offsite electric power system concurrent with turbine trip and unavailability of the onsite emergency AC power system. According to U.S. regulations, typically the coping period for an SBO is 4 hours and can be as long as 16 hours for currently operating BWR plants. Being able to cope with an SBO and loss of all AC power is required by international regulators as well. The U.S. licensing basis for the ESBWR is a coping period of 72 hours for an SBO based on U.S. NRC requirements for passive safety plants. In the event of an extended SBO (viz., greater than 72 hours), the ESBWR response shows that the design is able to cope with the event for at least 7 days without AC electrical power or operator action. ESBWR is a Generation III+ reactor design with an array of passive safety systems. The ESBWR primary success path for mitigation of an SBO event is the Isolation Condenser System (ICS). The ICS is a passive, closed loop, safety system that initiates automatically on a loss of power. Upon Station Blackout or loss of all AC power, the ICS begins removing decay heat from the Reactor Pressure Vessel (RPV) by (i) condensing the steam into water in heat exchangers located in pools of water above the containment, and (ii) transferring the decay heat to the atmosphere. The condensed water is then returned by gravity to cool the reactor again. The ICS alone is capable of maintaining the ESBWR in a safe shutdown condition after an SBO for an extended period. The fuel remains covered throughout the SBO event. The ICS is able to remove decay heat from the RPV for at least 7 days and maintains the reactor in a safe shutdown condition. The water level in the RPV remains well above the top of active fuel for the duration of the SBO event. Beyond 7 days, only a few simple actions are needed to cope with the SBO for an indefinite amount of time. The operation of the ICS as the primary success path for mitigation of an SBO, allows for near immediate plant restart once power is restored. (authors)

  16. Source term experiment STEP-3 simulating a PWR severe station blackout

    SciTech Connect (OSTI)

    Simms, R.; Baker, L. Jr.; Ritzman, R.L.

    1987-05-21

    For a severe PWR accident that leads to a loss of feedwater to the steam generators, such as might occur in a station blackout, fission product decay heating will cause a water boiloff. Without effective cooling of the core, steam will begin to oxidize the Zircaloy cladding. The noble gases and volatile fission products, such as Cs and I, that are major contributors to the radiological source term, will be released from the damaged fuel shortly after cladding failure. The accident environment when these volatile fission products escape was simulated in STEP-3 using four fuel elements from the Belgonucleaire BR3 reactor. The primary objective was to examine the releases in samples collected as close to the test zone as possible. In this paper, an analysis of the temperatures and hydrogen generation is compared with the measurements. The analysis is needed to estimate releases and characterize conditions at the source for studies of fission product transport.

  17. Demonstration of fully coupled simplified extended station black-out accident simulation with RELAP-7

    SciTech Connect (OSTI)

    Zhao, Haihua; Zhang, Hongbin; Zou, Ling; Anders, David; Martineau, Richard

    2014-10-01

    The RELAP-7 code is the next generation nuclear reactor system safety analysis code being developed at the Idaho National Laboratory (INL). The RELAP-7 code develop-ment effort started in October of 2011 and by the end of the second development year, a number of physical components with simplified two phase flow capability have been de-veloped to support the simplified boiling water reactor (BWR) extended station blackout (SBO) analyses. The demonstration case includes the major components for the primary system of a BWR, as well as the safety system components for the safety relief valve (SRV), the reactor core isolation cooling (RCIC) system, and the wet well. Three scenar-ios for the SBO simulations have been considered. Since RELAP-7 is not a severe acci-dent analysis code, the simulation stops when fuel clad temperature reaches damage point. Scenario I represents an extreme station blackout accident without any external cooling and cooling water injection. The system pressure is controlled by automatically releasing steam through SRVs. Scenario II includes the RCIC system but without SRV. The RCIC system is fully coupled with the reactor primary system and all the major components are dynamically simulated. The third scenario includes both the RCIC system and the SRV to provide a more realistic simulation. This paper will describe the major models and dis-cuss the results for the three scenarios. The RELAP-7 simulations for the three simplified SBO scenarios show the importance of dynamically simulating the SRVs, the RCIC sys-tem, and the wet well system to the reactor safety during extended SBO accidents.

  18. Introduction of a methoxymethyl side chain into p-phenylenediamine attenuates its sensitizing potency and reduces the risk of allergy induction

    SciTech Connect (OSTI)

    Goebel, Carsten; Troutman, John; Hennen, Jenny; Rothe, Helga; Schlatter, Harald; Gerberick, G. Frank; Blömeke, Brunhilde

    2014-02-01

    The strong sensitizing potencies of the most important primary intermediates of oxidative hair dyes, p-phenylenediamine (PPD) and p-toluylenediamine (PTD, i.e. 2-methyl-PPD) are well established. They are considered as the key sensitizers in hair dye allergic contact dermatitis. While modification of their molecular structure is expected to alter their sensitizing properties, it may also impair their color performance. With introduction of a methoxymethyl side chain we found the primary intermediate 2-methoxymethyl-p-phenylenediamine (ME-PPD) with excellent hair coloring performance but significantly reduced sensitizing properties compared to PPD and PTD: In vitro, ME-PPD showed an attenuated innate immune response when analyzed for its protein reactivity and dendritic cell activation potential. In vivo, the effective concentration of ME-PPD necessary to induce an immune response 3-fold above vehicle control (EC3 value) in the local lymph node assay (LLNA) was 4.3%, indicating a moderate skin sensitizing potency compared to values of 0.1 and 0.17% for PPD and PTD, respectively. Finally, assessing the skin sensitizing potency of ME-PPD under consumer hair dye usage conditions through a quantitative risk assessment (QRA) indicated an allergy induction risk negligible compared to PPD or PTD. - Highlights: • Methoxymethyl side chain in p-phenylenediamine reduces its strong skin sensitizing properties. • Reduced protein reactivity and dendritic cell activation. • Reduced skin sensitizing potency in local lymph node assay (LLNA). • Negligible allergy induction risk under hair dye usage conditions.

  19. Steam Line Break and Station Blackout Transients for Proliferation-Resistant Hexagonal Tight Lattice Boiling Water Reactor

    SciTech Connect (OSTI)

    Rohatgi, Upendra S. [Brookhaven National Laboratory (United States); Jo, Jae H. [Brookhaven National Laboratory (United States); Chung, Bub Dong [Brookhaven National Laboratory (United States); Takahashi, Hiroshi [Brookhaven National Laboratory (United States); Downar, Thomas J. [Purdue University (United States)

    2004-01-15

    Safety analyses of a proliferation-resistant, economically competitive, high-conversion boiling water reactor (HCBWR) fueled with fissile plutonium and fertile thorium oxide fuel elements, and with passive safety systems, are presented here. The HCBWR developed here is characterized by a very tight lattice with a relatively small water volume fraction in the core that therefore operates with a fast reactor neutron spectrum and a considerably improved neutron economy compared to the current generation of light water reactors. The tight lattice core has a very narrow flow channel with a hydraulic diameter less than half of the regular boiling water reactor (BWR) core and, thus, presents a special challenge to core cooling because of reduced water inventory and high friction in the core. The primary safety concern when reducing the moderator-to-fuel ratio and when using a tightly packed lattice arrangement is to maintain adequate cooling of the core during both normal operation and accident scenarios.In the preliminary HCBWR design, the core is placed in a vessel with a large chimney section, and the vessel is connected to the isolation condenser system (ICS). The vessel is placed in containment with the gravity driven cooling system (GDCS) and passive containment cooling system (PCCS) in a configuration similar to General Electric's simplified BWR (SBWR). The safety systems are similar to those of the SBWR; the ICS and PCCS are scaled with power. An internal recirculation pump is placed in the downcomer to augment the buoyancy head provided by the chimney since the buoyancy provided by the chimney alone could not generate sufficient recirculation in the vessel as the tight lattice configuration results in much larger friction in the core than with the SBWR.The constitutive relationships for RELAP5 are assessed for narrow channels, and as a result the heat transfer package is modified. The modified RELAP5 is used to simulate and analyze two of the most limiting events for a tight pitch lattice core: the station blackout and the main-steam-line-break events. The results of the analyses indicate that the HCBWR system will be safely brought to the shutdown condition for these transients.

  20. TEX-A-SYST: Reducing the Risk of Ground Water Contamination by Improving Well-Head Management and Conditions 

    E-Print Network [OSTI]

    Harris, Bill L.; Hoffman, D.; Mazac Jr., F. J.

    1997-08-29

    The condition of a water well and its proximity to contamination sources determine the risk it poses to ground water. Topics covered include well location, well construction, well age and type, well depth, well maintenance, water testing...

  1. Integrated Risk Assessment for the LaSalle Unit 2 Nuclear Power Plant, Phenomenology and Risk Uncertainty Evaluation Program (PRUEP), MELCOR code calculations. Volume 3

    SciTech Connect (OSTI)

    Shaffer, C.J. [Science and Engineering Associates, Albuquerque, NM (United States); Miller, L.A.; Payne, A.C. Jr.

    1992-10-01

    A Level III Probabilistic Risk Assessment (PRA) has been performed for LaSalle Unit 2 under the Risk Methods Integration and Evaluation Program (RMIEP) and the Phenomenology and Risk Uncertainty Evaluation Program (PRUEP). This report documents the phenomenological calculations and sources of. uncertainty in the calculations performed with HELCOR in support of the Level II portion of the PRA. These calculations are an integral part of the Level II analysis since they provide quantitative input to the Accident Progression Event Tree (APET) and Source Term Model (LASSOR). However, the uncertainty associated with the code results must be considered in the use of the results. The MELCOR calculations performed include four integrated calculations: (1) a high-pressure short-term station blackout, (2) a low-pressure short-term station blackout, (3) an intermediate-term station blackout, and (4) a long-term station blackout. Several sensitivity studies investigating the effect of variations in containment failure size and location, as well as hydrogen ignition concentration are also documented.

  2. Integrated Risk Assessment for the LaSalle Unit 2 Nuclear Power Plant, Phenomenology and Risk Uncertainty Evaluation Program (PRUEP), MELCOR code calculations

    SciTech Connect (OSTI)

    Shaffer, C.J. (Science and Engineering Associates, Albuquerque, NM (United States)); Miller, L.A.; Payne, A.C. Jr.

    1992-10-01

    A Level III Probabilistic Risk Assessment (PRA) has been performed for LaSalle Unit 2 under the Risk Methods Integration and Evaluation Program (RMIEP) and the Phenomenology and Risk Uncertainty Evaluation Program (PRUEP). This report documents the phenomenological calculations and sources of. uncertainty in the calculations performed with HELCOR in support of the Level II portion of the PRA. These calculations are an integral part of the Level II analysis since they provide quantitative input to the Accident Progression Event Tree (APET) and Source Term Model (LASSOR). However, the uncertainty associated with the code results must be considered in the use of the results. The MELCOR calculations performed include four integrated calculations: (1) a high-pressure short-term station blackout, (2) a low-pressure short-term station blackout, (3) an intermediate-term station blackout, and (4) a long-term station blackout. Several sensitivity studies investigating the effect of variations in containment failure size and location, as well as hydrogen ignition concentration are also documented.

  3. Reducing Transaction Costs for Energy Efficiency Investments and Analysis of Economic Risk Associated With Building Performance Uncertainties: Small Buildings and Small Portfolios Program

    SciTech Connect (OSTI)

    Langner, R.; Hendron, B.; Bonnema, E.

    2014-08-01

    The small buildings and small portfolios (SBSP) sector face a number of barriers that inhibit SBSP owners from adopting energy efficiency solutions. This pilot project focused on overcoming two of the largest barriers to financing energy efficiency in small buildings: disproportionately high transaction costs and unknown or unacceptable risk. Solutions to these barriers can often be at odds, because inexpensive turnkey solutions are often not sufficiently tailored to the unique circumstances of each building, reducing confidence that the expected energy savings will be achieved. To address these barriers, NREL worked with two innovative, forward-thinking lead partners, Michigan Saves and Energi, to develop technical solutions that provide a quick and easy process to encourage energy efficiency investments while managing risk. The pilot project was broken into two stages: the first stage focused on reducing transaction costs, and the second stage focused on reducing performance risk. In the first stage, NREL worked with the non-profit organization, Michigan Saves, to analyze the effects of 8 energy efficiency measures (EEMs) on 81 different baseline small office building models in Holland, Michigan (climate zone 5A). The results of this analysis (totaling over 30,000 cases) are summarized in a simple spreadsheet tool that enables users to easily sort through the results and find appropriate small office EEM packages that meet a particular energy savings threshold and are likely to be cost-effective.

  4. Uncertainties in source term estimates for a station blackout accident in a BWR with Mark I containment

    SciTech Connect (OSTI)

    Lee, M.; Cazzoli, E.; Liu, Y.; Davis, R.; Nourbakhsh, H.; Schmidt, E.; Unwin, S.; Khatib-Rahbar, M.

    1988-01-01

    In this paper, attention is limited to a single accident progression sequence, namly a station blackout accident in a BWR with a Mark I containment building. Identified as an important accident in the draft version of NUREG-1150 a station blackout involves loss of both off-site power and dc power resulting in failure of the diesels to start and in the unavailability of the high pressure injection and core isolation cooling systems. This paper illustrates the calculated uncertainties (Probability Density Functions) associated with the radiological releases into the environment for the nine fission product groups at 10 hours following the initiation of core-concrete interactions. Also shown are the results ofthe STCP base case simulation. 5 refs., 1 fig., 1 tab.

  5. Networks, deregulation, and risk : the politics of critical infrastructure protection

    E-Print Network [OSTI]

    Ellis, Ryan Nelson

    2011-01-01

    Causes of the August 14th Blackout in the United States andThe possibility that the blackout could have been caused byBush Doesn‘t Let Blackout Upset Lunch with Troops. ? New

  6. SOARCA Peach Bottom Atomic Power Station Long-Term Station Blackout Uncertainty Analysis: Knowledge Advancement.

    SciTech Connect (OSTI)

    Gauntt, Randall O.; Mattie, Patrick D.; Bixler, Nathan E.; Ross, Kyle; Cardoni, Jeffrey N; Kalinich, Donald A.; Osborn, Douglas M.; Sallaberry, Cedric Jean-Marie; Ghosh, S. Tina

    2014-02-01

    This paper describes the knowledge advancements from the uncertainty analysis for the State-of- the-Art Reactor Consequence Analyses (SOARCA) unmitigated long-term station blackout accident scenario at the Peach Bottom Atomic Power Station. This work assessed key MELCOR and MELCOR Accident Consequence Code System, Version 2 (MACCS2) modeling uncertainties in an integrated fashion to quantify the relative importance of each uncertain input on potential accident progression, radiological releases, and off-site consequences. This quantitative uncertainty analysis provides measures of the effects on consequences, of each of the selected uncertain parameters both individually and in interaction with other parameters. The results measure the model response (e.g., variance in the output) to uncertainty in the selected input. Investigation into the important uncertain parameters in turn yields insights into important phenomena for accident progression and off-site consequences. This uncertainty analysis confirmed the known importance of some parameters, such as failure rate of the Safety Relief Valve in accident progression modeling and the dry deposition velocity in off-site consequence modeling. The analysis also revealed some new insights, such as dependent effect of cesium chemical form for different accident progressions. (auth)

  7. Source-term experiment STEP-3 simulating a PWR severe station blackout

    SciTech Connect (OSTI)

    Simms, R.; Baker, L. Jr.; Ritzman, R.L.

    1987-01-01

    For a severe pressurized water reactor accident that leads to a loss of feedwater to the stream generators, such as might occur in a station blackout, fission product decay heating causes a water boil-off. Without effective decay heat removal, the fuel elements will be uncovered. Eventually, steam will oxidize the overheated cladding. The noble gases and volatile fission products, such as cesium and iodine, that are major contributors to the radiological source term will be released from the damaged fuel shortly after cladding failure. The accident environment when these volatile fission products escape was simulated in STEP-3 using four fuel elements from the Belgonucleaire BR3 reactor. The primary objective was to examine the releases in samples collected as close to the test zone as possible. In this paper, an analysis of the temperatures and hydrogen generation is compared with the measurements. The analysis is needed to estimate releases and characterize conditions at the source for studies of fission product transport.

  8. Analysis of fission product revaporization in a BWR reactor cooling system during a station blackout accident

    SciTech Connect (OSTI)

    Yang, J.W.; Schmidt, E.; Cazzoli, E.; Khatib-Rahbar, M.

    1988-01-01

    This report presents a preliminary analysis of fission product revaporization in the Reactor Cooling System (RCS) after the vessel failure. The station blackout transient for BWR Mark I Power Plant is considered. The TRAPMELT3 models of evaporization, chemisorption, and the decay heating of RCS structures and gases are adopted in the analysis. The RCS flow models based on the density-difference between the RCS and containment pedestal region are developed to estimate the RCS outflow which carries the revaporized fission product to the containment. A computer code called REVAP is developed for the analysis. The REVAP is incorporated with the MARCH, TRAPMELT3 and NAUA codes of the Source Term Code Pack Package (STCP). The NAUA code is used to estimate the impact of revaporization on environmental release. The results show that the thermal-hydraulic conditions between the RCS and the pedestal region are important factors determining the magnitude of revaporization and subsequent release of the volatile fission product. 8 figs., 1 tab.

  9. MELCOR Analysis of Steam Generator Tube Creep Rupture in Station Blackout Severe Accident

    SciTech Connect (OSTI)

    Liao, Y.; Vierow, K. [Purdue University (United States)

    2005-12-15

    A pressurized water reactor steam generator tube rupture (SGTR) is of concern because it represents a bypass of the containment for radioactive materials to the environment. In a station blackout accident, tube integrity could be threatened by creep rupture, particularly if cracks are present in the tube walls. Methods are developed herein to improve assessment capabilities for SGTR by using the severe-accident code MELCOR. Best-estimate assumptions based on recent research and computational fluid dynamics calculations are applied in the MELCOR analysis to simulate two-dimensional natural circulation and to determine the relative creep-rupture timing in the reactor coolant pressure boundary components. A new method is developed to estimate the steam generator (SG) hottest tube wall temperature and the tube critical crack size for the SG tubes to fail first. The critical crack size for SG tubes to fail first is estimated to be 20% of the wall thickness larger than by a previous analysis. Sensitivity studies show that the failure sequence would change if some assumptions are modified. In particular, the uncertainty in the countercurrent flow limit model could reverse the failure sequence of the SG tubes and surge line.

  10. An uncertainty analysis of the hydrogen source term for a station blackout accident in Sequoyah using MELCOR 1.8.5

    SciTech Connect (OSTI)

    Gauntt, Randall O.; Bixler, Nathan E.; Wagner, Kenneth Charles

    2014-03-01

    A methodology for using the MELCOR code with the Latin Hypercube Sampling method was developed to estimate uncertainty in various predicted quantities such as hydrogen generation or release of fission products under severe accident conditions. In this case, the emphasis was on estimating the range of hydrogen sources in station blackout conditions in the Sequoyah Ice Condenser plant, taking into account uncertainties in the modeled physics known to affect hydrogen generation. The method uses user-specified likelihood distributions for uncertain model parameters, which may include uncertainties of a stochastic nature, to produce a collection of code calculations, or realizations, characterizing the range of possible outcomes. Forty MELCOR code realizations of Sequoyah were conducted that included 10 uncertain parameters, producing a range of in-vessel hydrogen quantities. The range of total hydrogen produced was approximately 583kg 131kg. Sensitivity analyses revealed expected trends with respected to the parameters of greatest importance, however, considerable scatter in results when plotted against any of the uncertain parameters was observed, with no parameter manifesting dominant effects on hydrogen generation. It is concluded that, with respect to the physics parameters investigated, in order to further reduce predicted hydrogen uncertainty, it would be necessary to reduce all physics parameter uncertainties similarly, bearing in mind that some parameters are inherently uncertain within a range. It is suspected that some residual uncertainty associated with modeling complex, coupled and synergistic phenomena, is an inherent aspect of complex systems and cannot be reduced to point value estimates. The probabilistic analyses such as the one demonstrated in this work are important to properly characterize response of complex systems such as severe accident progression in nuclear power plants.

  11. Investigations on optimization of accident management measures following a station blackout accident in a VVER-1000 pressurized water reactor

    SciTech Connect (OSTI)

    Tusheva, P.; Schaefer, F.; Kliem, S. [Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, D-01328 Dresden (Germany)

    2012-07-01

    The reactor safety issues are of primary importance for preserving the health of the population and ensuring no release of radioactivity and fission products into the environment. A part of the nuclear research focuses on improvement of the safety of existing nuclear power plants. Studies, research and efforts are a continuing process at improving the safety and reliability of existing and newly developed nuclear power plants at prevention of a core melt accident. Station blackout (loss of AC power supply) is one of the dominant accidents taken into consideration at performing accident analysis. In case of multiple failures of safety systems it leads to a severe accident. To prevent an accident to turn into a severe one or to mitigate the consequences, accident management measures must be performed. The present paper outlines possibilities for application and optimization of accident management measures following a station blackout accident. Assessed is the behaviour of the nuclear power plant during a station blackout accident without accident management measures and with application of primary/secondary side oriented accident management measures. Discussed are the possibilities for operators ' intervention and the influence of the performed accident management measures on the course of the accident. Special attention has been paid to the effectiveness of the passive feeding and physical phenomena having an influence on the system behaviour. The performed simulations show that the effectiveness of the secondary side feeding procedure can be limited due to an early evaporation or flashing effects in the feed water system. The analyzed cases show that the effectiveness of the accident management measures strongly depends on the initiation criteria applied for depressurization of the reactor coolant system. (authors)

  12. Hydrogen Mitigation Strategy of the APR1400 Nuclear Power Plant for a Hypothetical Station Blackout Accident

    SciTech Connect (OSTI)

    Kim, Jongtae; Hong, Seong-Wan; Kim, Sang-Baik; Kim, Hee-Dong [Korea Atomic Energy Research Institute (Korea, Republic of)

    2005-06-15

    In order to analyze the hydrogen distribution during a hypothetical station blackout accident in the Korean next-generation Advanced Power Reactor 1400 (APR1400) containment, the three-dimensional computational fluid dynamics code GASFLOW was used. The source of the hydrogen and steam for the GASFLOW analysis was obtained from a MAAP calculation. The discharged water, steam, and hydrogen from the pressurizer are released into the water of the in-containment refueling water storage tank (IRWST). Most of the discharged steam is condensed in the IRWST water because of its subcooling, and dry hydrogen is released into the free volume of the IRWST; finally, it goes out to the annular compartment above the IRWST through the vent holes. From the GASFLOW analysis, it was found that the gas mixture in the IRWST becomes quickly nonflammable by oxygen starvation but the hydrogen is accumulated in the annular compartment because of the narrow ventilation gap between the operating deck and containment wall when the igniters installed in the IRWST are not operated. When the igniters installed in the APR1400 were turned on, a short period of burning occurred in the IRWST, and then the flame was extinguished by the oxygen starvation in the IRWST. The unburned hydrogen was released into the annular compartment and went up to the dome because no igniters are installed around the annular compartment in the base design of the APR1400. From this result, it could be concluded that the control of the hydrogen concentration is difficult for the base design. In this study design modifications are proposed and evaluated with GASFLOW in view of the hydrogen mitigation strategy.

  13. Source terms released into the environment for a station blackout severe accident at the Peach Bottom Atomic Power Station

    SciTech Connect (OSTI)

    Carbajo, J.J.

    1995-07-01

    This study calculates source terms released into the environment at the Peach Bottom Atomic Power Station after containment failure during a postulated low-pressure, short-term station blackout severe accident. The severe accident analysis code MELCOR, version 1.8.1, was used in these calculations. Source terms were calculated for three different containment failure modes. The largest environmental releases occur for early containment failure at the drywell liner in contact with the cavity by liner melt-through. This containment failure mode is very likely to occur when the cavity is dry during this postulated severe accident sequence.

  14. Comparison of a Traditional Probabilistic Risk Assessment Approach with Advanced Safety Analysis

    SciTech Connect (OSTI)

    Smith, Curtis L; Mandelli, Diego; Zhegang Ma

    2014-11-01

    As part of the Light Water Sustainability Program (LWRS) [1], the purpose of the Risk Informed Safety Margin Characterization (RISMC) [2] Pathway research and development (R&D) is to support plant decisions for risk-informed margin management with the aim to improve economics, reliability, and sustain safety of current NPPs. In this paper, we describe the RISMC analysis process illustrating how mechanistic and probabilistic approaches are combined in order to estimate a safety margin. We use the scenario of a “station blackout” (SBO) wherein offsite power and onsite power is lost, thereby causing a challenge to plant safety systems. We describe the RISMC approach, illustrate the station blackout modeling, and contrast this with traditional risk analysis modeling for this type of accident scenario. We also describe our approach we are using to represent advanced flooding analysis.

  15. Performance of "WAMS East 1" in Providing Dynamic Information for the North East Blackout of August 14, 2003

    SciTech Connect (OSTI)

    Hauer, John F.; Bhatt, Navin B.; Shah, Kirit; Kolluri, Sharma

    2004-12-31

    The blackout that impacted the U.S. and Canada on August 14, 2003, was notable for its extent, complexity, and impact. It triggered a massive review of operating records to determine what happened, why it happened, and how to avoid it in future operations. Much of this work was done at NERC level, through the U.S.-Canada Power System Outage Task Force. Additional background information concerning the event was gathered together by a group of utilities that, collectively, have been developing a wide area measurement system (WAMS) for the eastern interconnection. Like its counterpart in the western interconnection, "WAMS East" has a primary backbone of synchronized phasor measurements that are continuously recorded at central locations. Operational data have been critical for understanding and responding to the August 14 Blackout. Records collected on WAMS East demonstrate the contributions that well synchronized data offer in such efforts, and the value of strategically located continuous recording systems to facilitate their integration. This paper examines overall performance of the WAMS East backbone, with a brief assessment of the technology involved.

  16. ProfessorMassoudAmin,D.Sc. Professor Massoud Amin (http://umn.edu/~amin) witnessed the 1977 NYC blackout, the 9/11 tragedies near DC, and the

    E-Print Network [OSTI]

    Amin, S. Massoud

    blackout, the 9/11 tragedies near DC, and the collapse of the I-35W bridge. He works on enabling smart, secure and resilient infrastructures. He leads extensive projects in smart grids and is considered the father of smart grid. Since March 2003 Professor Amin has served as director of the Technological

  17. Establishing Public Policy as a Primary Cause of Engineering Failure: Did Market Deregulation Lead to the North American `Blackout', August 14th 2003?

    E-Print Network [OSTI]

    Williamson, John

    some 3,700 utility organizations providing more than 320,000 kilometers of transmission lines and Ontario, Canada, experienced an electric power blackout on 14th August 2003. The outage affected an area to their power supplies. Losses have been estimated between $5-10 billion. It is, therefore, one of the most wide

  18. Hawaii International Conference on System Sciences, January 3-6, 2001, Maui, Hawaii. 2001 IEEE Modeling Blackout Dynamics in Power Transmission Networks

    E-Print Network [OSTI]

    Newman, David

    in electric power transmission systems is implemented and studied in simple networks with a regular structure Electric power transmission systems are complex engineering systems with many interacting components failure, weather conditions, vandalism, and human error [1]. The dominant causes triggering blackouts

  19. Qualitative Exposure Assessment Multiple Agent Form APPLICABILITY: It should be noted that the purpose of this document is to define priorities and resources for quantitative exposure monitoring or other evaluation and control tools to reduce the risk as

    E-Print Network [OSTI]

    or other evaluation and control tools to reduce the risk associated with this project. THIS DOCUMENT DOES conditions will be evaluated and protective measures prescribed to include as necessary, but not limited to, a pre-job briefing, work-rest cycles, biometric monitoring, PPE, etc. (2) Ergonomics: Qualitative

  20. Two-Stage, Integrated, Geothermal-CO2 Storage Reservoirs: An Approach for Sustainable Energy Production, CO2-Sequestration Security, and Reduced Environmental Risk

    SciTech Connect (OSTI)

    Buscheck, T A; Chen, M; Sun, Y; Hao, Y; Elliot, T R

    2012-02-02

    We introduce a hybrid two-stage energy-recovery approach to sequester CO{sub 2} and produce geothermal energy at low environmental risk and low cost by integrating geothermal production with CO{sub 2} capture and sequestration (CCS) in saline, sedimentary formations. Our approach combines the benefits of the approach proposed by Buscheck et al. (2011b), which uses brine as the working fluid, with those of the approach first suggested by Brown (2000) and analyzed by Pruess (2006), using CO{sub 2} as the working fluid, and then extended to saline-formation CCS by Randolph and Saar (2011a). During stage one of our hybrid approach, formation brine, which is extracted to provide pressure relief for CO{sub 2} injection, is the working fluid for energy recovery. Produced brine is applied to a consumptive beneficial use: feedstock for fresh water production through desalination, saline cooling water, or make-up water to be injected into a neighboring reservoir operation, such as in Enhanced Geothermal Systems (EGS), where there is often a shortage of a working fluid. For stage one, it is important to find economically feasible disposition options to reduce the volume of brine requiring reinjection in the integrated geothermal-CCS reservoir (Buscheck et al. 2012a). During stage two, which begins as CO{sub 2} reaches the production wells; coproduced brine and CO{sub 2} are the working fluids. We present preliminary reservoir engineering analyses of this approach, using a simple conceptual model of a homogeneous, permeable CO{sub 2} storage formation/geothermal reservoir, bounded by relatively impermeable sealing units. We assess both the CO{sub 2} sequestration capacity and geothermal energy production potential as a function of well spacing between CO{sub 2} injectors and brine/CO{sub 2} producers for various well patterns and for a range of subsurface conditions.

  1. Containment failure time and mode for a low-pressure short-term station blackout in a BWR-4 with Mark-I containment

    SciTech Connect (OSTI)

    Carbajo, J.J.; Greene, S.R. (Oak Ridge National Lab., TN (United States))

    1993-01-01

    This study investigates containment failure time and mode for a low-pressure, short-term station blackout severe accident sequence in a boiling water reactor (BWR-4) with a Mark-I containment. The severe accident analysis code MELCOR, version 1.8.1, was used in these calculations. Other results using the MELCOR/CORBH package and the BWRSAR and CONTAIN codes are also presented and compared to the MELCOR results. The plant analyzed is the Peach Bottom atomic station, a BWR-4 with a Mark-I containment. The automatic depressurization system was used to depressurize the vessel in accordance with the Emergency Procedure Guidelines. Two different variations of the station blackout were studied: one with a dry cavity and the other with a flooded cavity. For the flooded cavity, it is assumed that a control rod drive (CRD) pump becomes operational after vessel failure, and it is used to pump water into the cavity.

  2. Analysis of the FeCrAl Accident Tolerant Fuel Concept Benefits during BWR Station Blackout Accidents

    SciTech Connect (OSTI)

    Robb, Kevin R

    2015-01-01

    Iron-chromium-aluminum (FeCrAl) alloys are being considered for fuel concepts with enhanced accident tolerance. FeCrAl alloys have very slow oxidation kinetics and good strength at high temperatures. FeCrAl could be used for fuel cladding in light water reactors and/or as channel box material in boiling water reactors (BWRs). To estimate the potential safety gains afforded by the FeCrAl concept, the MELCOR code was used to analyze a range of postulated station blackout severe accident scenarios in a BWR/4 reactor employing FeCrAl. The simulations utilize the most recently known thermophysical properties and oxidation kinetics for FeCrAl. Overall, when compared to the traditional Zircaloy-based cladding and channel box, the FeCrAl concept provides a few extra hours of time for operators to take mitigating actions and/or for evacuations to take place. A coolable core geometry is retained longer, enhancing the ability to stabilize an accident. Finally, due to the slower oxidation kinetics, substantially less hydrogen is generated, and the generation is delayed in time. This decreases the amount of non-condensable gases in containment and the potential for deflagrations to inhibit the accident response.

  3. Developing Fully Coupled Dynamical Reactor Core Isolation System Models in RELAP-7 for Extended Station Black-Out Analysis

    SciTech Connect (OSTI)

    Haihua Zhao; Ling Zou; Hongbin Zhang; David Andrs; Richard Martineau

    2014-04-01

    The reactor core isolation cooling (RCIC) system in a boiling water reactor (BWR) provides makeup water to the reactor vessel for core cooling when the main steam lines are isolated and the normal supply of water to the reactor vessel is lost. It was one of the very few safety systems still available during the Fukushima Daiichi accidents after the tsunamis hit the plants and the system successfully delayed the core meltdown for a few days for unit 2 & 3. Therefore, detailed models for RCIC system components are indispensable to understand extended station black-out accidents (SBO) for BWRs. As part of the effort to develop the new generation reactor system safety analysis code RELAP-7, major components to simulate the RCIC system have been developed. This paper describes the models for those components such as turbine, pump, and wet well. Selected individual component test simulations and a simplified SBO simulation up to but before core damage is presented. The successful implementation of the simplified RCIC and wet well models paves the way to further improve the models for safety analysis by including more detailed physical processes in the near future.

  4. Experimental and code simulation of a station blackout scenario for APR1400 with test facility ATLAS and MARS code

    SciTech Connect (OSTI)

    Yu, X. G.; Kim, Y. S.; Choi, K. Y.; Park, H. S.; Cho, S.; Kang, K. H.; Choi, N. H. [Thermal-hydraulic Safety Research Div., KAERI Korea Atomic Energy Research Inst., Dae-deok Dae-ro 989-111, Yuseong-gu, Daejeon (Korea, Republic of)

    2012-07-01

    A SBO (station blackout) experiment named SBO-01 was performed at full-pressure IET (Integral Effect Test) facility ATLAS (Advanced Test Loop for Accident Simulation) which is scaled down from the APR1400 (Advanced Power Reactor 1400 MWe). In this study, the transient of SBO-01 is discussed and is subdivided into three phases: the SG fluid loss phase, the RCS fluid loss phase, and the core coolant depletion and core heatup phase. In addition, the typical phenomena in SBO-01 test - SG dryout, natural circulation, core coolant boiling, the PRZ full, core heat-up - are identified. Furthermore, the SBO-01 test is reproduced by the MARS code calculation with the ATLAS model which represents the ATLAS test facility. The experimental and calculated transients are then compared and discussed. The comparison reveals there was malfunction of equipments: the SG leakage through SG MSSV and the measurement error of loop flow meter. As the ATLAS model is validated against the experimental results, it can be further employed to investigate the other possible SBO scenarios and to study the scaling distortions in the ATLAS. (authors)

  5. Survey of Tools for Risk Assessment of Cascading Outages

    SciTech Connect (OSTI)

    Papic, Milorad; Bell, Keith; Chen, Yousu; Dobson, Ian; Fonte, Louis; Haq, Enamul; Hines, Paul; Kirschen, Daniel; Luo, Xiaochuan; Miller, Stephen; Samaan, Nader A.; Vaiman, Marianna; Varghese, Matthew; Zhang, Pei

    2011-10-17

    Cascading failure can cause large blackouts, and a variety of methods are emerging to study this challenging topic. In parts 1 and 2 of this paper, the IEEE task force on cascading failure seeks to consolidate and review the progress of the field towards methods and tools of assessing the risk of cascading failure. Part 2 summarizes and discusses the state of the art in the available cascading failure modeling tools. The discussion integrates industry and research perspectives from a variety of institutions. Strengths, weaknesses, and gaps in current approaches are indicated.

  6. WASTE DESCRIPTION TYPE OF PROJECT POUNDS REDUCED,

    E-Print Network [OSTI]

    to the manufacturer . Replaced with energy efficient light emitting diode (LED) signs. Project reduced risk of tritium

  7. Effect of the timing of vessel depressurization on a short-term station blackout in a BWR-4 performed with the MELCOR code

    SciTech Connect (OSTI)

    Carbajo, J.J. (Oak Ridge National Lab., TN (United States))

    1992-01-01

    This study evaluates the effect that the timing of vessel depressurization has in the progression of a short-term station blackout accident in a boiling water reactor (BWR)-4. This study was performed with the MELCOR (version 1.8.1) severe-accident code. A similar study was previously completed at Oak Ridge National Laboratory (ORNL) using different computer codes. The purpose of this study is to confirm and expand on the previous study and investigate the applicability of MELCOR for severe-accident management analysis.

  8. Comparison of MELCOR and SCDAP/RELAP5 results for a low-pressure, short-term station blackout at Browns Ferry

    SciTech Connect (OSTI)

    Carbajo, J.J. [Oak Ridge National Lab., TN (United States)

    1995-12-31

    This study compares results obtained with two U.S. Nuclear Regulatory Commission (NRC)-sponsored codes, MELCOR version 1.8.3 (1.8PQ) and SCDAP/RELAP5 Mod3.1 release C, for the same transient - a low-pressure, short-term station blackout accident at the Browns Ferry nuclear plant. This work is part of MELCOR assessment activities to compare core damage progression calculations of MELCOR against SCDAP/RELAP5 since the two codes model core damage progression very differently.

  9. Modeling of a Flooding Induced Station Blackout for a Pressurized Water Reactor Using the RISMC Toolkit

    SciTech Connect (OSTI)

    Mandelli, Diego; Prescott, Steven R; Smith, Curtis L; Alfonsi, Andrea; Rabiti, Cristian; Cogliati, Joshua J; Kinoshita, Robert A

    2011-07-01

    In the Risk Informed Safety Margin Characterization (RISMC) approach we want to understand not just the frequency of an event like core damage, but how close we are (or are not) to key safety-related events and how might we increase our safety margins. The RISMC Pathway uses the probabilistic margin approach to quantify impacts to reliability and safety by coupling both probabilistic (via stochastic simulation) and mechanistic (via physics models) approaches. This coupling takes place through the interchange of physical parameters and operational or accident scenarios. In this paper we apply the RISMC approach to evaluate the impact of a power uprate on a pressurized water reactor (PWR) for a tsunami-induced flooding test case. This analysis is performed using the RISMC toolkit: RELAP-7 and RAVEN codes. RELAP-7 is the new generation of system analysis codes that is responsible for simulating the thermal-hydraulic dynamics of PWR and boiling water reactor systems. RAVEN has two capabilities: to act as a controller of the RELAP-7 simulation (e.g., system activation) and to perform statistical analyses (e.g., run multiple RELAP-7 simulations where sequencing/timing of events have been changed according to a set of stochastic distributions). By using the RISMC toolkit, we can evaluate how power uprate affects the system recovery measures needed to avoid core damage after the PWR lost all available AC power by a tsunami induced flooding. The simulation of the actual flooding is performed by using a smooth particle hydrodynamics code: NEUTRINO.

  10. Portal Vein Embolization Using a Nitinol Plug (Amplatzer Vascular Plug) in Combination with Histoacryl Glue and Iodinized Oil: Adequate Hypertrophy with a Reduced Risk of Nontarget Embolization

    SciTech Connect (OSTI)

    Bent, Clare L., E-mail: clare_bent@yahoo.co.uk; Low, Deborah; Matson, Matthew B.; Renfrew, Ian; Fotheringham, Tim [Barts and The London NHS Trust, Department of Diagnostic Imaging (United Kingdom)

    2009-05-15

    The purpose of this study was to assess whether portal vein embolization (PVE) using a nitinol vascular plug in combination with histoacryl glue and iodinized oil minimizes the risk of nontarget embolization while obtaining good levels of future liver remnant (FLR) hypertrophy. Between November 2005 and August 2008, 16 patients (8 females, 8 males; mean age, 63 {+-} 3.6 years), each with a small FLR, underwent right ipsilateral transhepatic PVE prior to major hepatectomy. Proximal PVE was initially performed by placement of a nitinol vascular plug, followed by distal embolization using a mixture of histoacryl glue and iodinized oil. Pre- and 6 weeks postprocedural FLR volumes were calculated using computed tomographic imaging. Selection for surgery required an FLR of 0.5% of the patient's body mass. Clinical course and outcome of surgical resection for all patients were recorded. At surgery, the ease of hepatectomy was subjectively assessed in comparison to previous experience following PVE with alternative embolic agents. PVE was successful in all patients. Mean procedure time was 30.4 {+-} 2.5 min. Mean absolute increase in FLR volume was 68.9% {+-} 12.0% (p = 0.00005). There was no evidence of nontarget embolization during the procedure or on subsequent imaging. Nine patients proceeded to extended hepatectomy. Six patients demonstrated disease progression. One patient did not achieve sufficient hypertrophy in relation to body mass to undergo hepatic resection. At surgery, the hepatobiliary surgeons observed less periportal inflammation compared to previous experience with alternative embolic agents, facilitating dissection at extended hepatectomy. In conclusion, ipsilateral transhepatic PVE using a single nitinol plug in combination with histoacryl glue and iodinized oil simplifies the procedure, offering short procedural times with minimal risk of nontarget embolization. Excellent levels of FLR hypertrophy are achieved enabling safe extended hepatectomy.

  11. Do Angiotensin-Converting Enzyme Inhibitors Reduce the Risk of Symptomatic Radiation Pneumonitis in Patients With Non-Small Cell Lung Cancer After Definitive Radiation Therapy? Analysis of a Single-Institution Database

    SciTech Connect (OSTI)

    Wang, Hongmei [Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, P.R. of China (China); Liao, Zhongxing, E-mail: zliao@mdanderson.org [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Zhuang, Yan; Xu, Ting; Nguyen, Quynh-Nhu; Levy, Lawrence B.; O'Reilly, Michael [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Gold, Kathryn A. [Department of Thoracic Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Gomez, Daniel R. [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas (United States)

    2013-12-01

    Purpose: Preclinical studies have suggested that angiotensin-converting enzyme inhibitors (ACEIs) can mitigate radiation-induced lung injury. We sought here to investigate possible associations between ACEI use and the risk of symptomatic radiation pneumonitis (RP) among patients undergoing radiation therapy (RT) for non–small cell lung cancer (NSCLC). Methods and Materials: We retrospectively identified patients who received definitive radiation therapy for stages I to III NSCLC between 2004 and 2010 at a single tertiary cancer center. Patients must have received a radiation dose of at least 60 Gy for a single primary lung tumor and have had imaging and dosimetric data available for analysis. RP was quantified according to Common Terminology Criteria for Adverse Events, version 3.0. A Cox proportional hazard model was used to assess potential associations between ACEI use and risk of symptomatic RP. Results: Of 413 patients analyzed, 65 were using ACEIs during RT. In univariate analysis, the rate of RP grade ?2 seemed lower in ACEI users than in nonusers (34% vs 46%), but this apparent difference was not statistically significant (P=.06). In multivariate analysis of all patients, ACEI use was not associated with the risk of symptomatic RP (hazard ratio [HR] = 0.66; P=.07) after adjustment for sex, smoking status, mean lung dose (MLD), and concurrent carboplatin and paclitaxel chemotherapy. Subgroup analysis showed that ACEI use did have a protective effect from RP grade ?2 among patients who received a low (?20-Gy) MLD (P<.01) or were male (P=.04). Conclusions: A trend toward reduction in symptomatic RP among patients taking ACEIs during RT for NSCLC was not statistically significant on univariate or multivariate analyses, although certain subgroups may benefit from use (ie, male patients and those receiving low MLD). The evidence at this point is insufficient to establish whether the use of ACEIs does or does not reduce the risk of RP.

  12. Blackout Final Implementation Report

    Office of Environmental Management (EM)

    and are paying particular attention to transmis- sion planning, cost allocation for multi-state trans- mission projects, and ensuring the timely recovery of prudent...

  13. Blackout Final Implementation Report

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De pEnergy Industrial Local GovernmentDepartment ofFinal

  14. Reducing Food Safety Risks in Community Gardens

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    as good agricultural practices (GAPs) -- has been pointed to by the U.S. Food and Drug Administration are also applicable to community and school gardens. The steps presented in this guide are practical of the final products. Good agricultural practices are the basic environmental and operational conditions

  15. Comparison of MELCOR modeling techniques and effects of vessel water injection on a low-pressure, short-term, station blackout at the Grand Gulf Nuclear Station

    SciTech Connect (OSTI)

    Carbajo, J.J.

    1995-06-01

    A fully qualified, best-estimate MELCOR deck has been prepared for the Grand Gulf Nuclear Station and has been run using MELCOR 1.8.3 (1.8 PN) for a low-pressure, short-term, station blackout severe accident. The same severe accident sequence has been run with the same MELCOR version for the same plant using the deck prepared during the NUREG-1150 study. A third run was also completed with the best-estimate deck but without the Lower Plenum Debris Bed (BH) Package to model the lower plenum. The results from the three runs have been compared, and substantial differences have been found. The timing of important events is shorter, and the calculated source terms are in most cases larger for the NUREG-1150 deck results. However, some of the source terms calculated by the NUREG-1150 deck are not conservative when compared to the best-estimate deck results. These results identified some deficiencies in the NUREG-1150 model of the Grand Gulf Nuclear Station. Injection recovery sequences have also been simulated by injecting water into the vessel after core relocation started. This marks the first use of the new BH Package of MELCOR to investigate the effects of water addition to a lower plenum debris bed. The calculated results indicate that vessel failure can be prevented by injecting water at a sufficiently early stage. No pressure spikes in the vessel were predicted during the water injection. The MELCOR code has proven to be a useful tool for severe accident management strategies.

  16. Clinical practice of risk assessment of sexual violence 

    E-Print Network [OSTI]

    Judge, Joseph Gerard

    2012-11-28

    Background: Risk assessment of sexual violence involves evidence based evaluation of the risks posed by sexual offenders. It informs risk management; the provision of treatment that reduces the risk of future sexual ...

  17. Algorithmic Aspects of Risk Management

    E-Print Network [OSTI]

    Gehani, Ashish

    Algorithmic Aspects of Risk Management Ashish Gehani1 , Lee Zaniewski2 , and K. Subramani2 1 SRI International 2 West Virginia University Abstract. Risk analysis has been used to manage the security of sys configuration. This allows risk management to occur in real time and reduces the window of exposure to attack

  18. D:\0myfiles\Blackout Progress\Blackout-Progress.vp

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p aDepartmentEnergyEveryCustomer ServiceVisualization81August 14,

  19. Blackout 2003: Blackout Final Implementation Report | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBio Centers Announcementand TheBiota Biota

  20. Reduces electric energy consumption

    E-Print Network [OSTI]

    BENEFITS · Reduces electric energy consumption · Reduces peak electric demand · Reduces natural gas consumption · Reduces nonhazardous solid waste and wastewater generation · Potential annual savings products for the automotive industry, electrical equipment, and miscellaneous other uses nationwide. ALCOA

  1. Presented by the CSI What is Risk Management?

    E-Print Network [OSTI]

    Gering, Jon C.

    Presented by the CSI #12;What is Risk Management? Identifying Risks: Identifying potential the potential for risks to become reality Managing Risks: Assessing individual risks and developing a plan and perceived risks of an event that your organization is coordinating or participating in Mitigation: Reducing

  2. Effect of Wind Intermittency on the Electric Grid: Mitigating the Risk of Energy Deficits

    E-Print Network [OSTI]

    George, Sam O; Nguyen, Scott V

    2010-01-01

    Successful implementation of California's Renewable Portfolio Standard (RPS) mandating 33 percent renewable energy generation by 2020 requires inclusion of a robust strategy to mitigate increased risk of energy deficits (blackouts) due to short time-scale (sub 1 hour) intermittencies in renewable energy sources. Of these RPS sources, wind energy has the fastest growth rate--over 25% year-over-year. If these growth trends continue, wind energy could make up 15 percent of California's energy portfolio by 2016 (wRPS15). However, the hour-to-hour variations in wind energy (speed) will create large hourly energy deficits that require installation of other, more predictable, compensation generation capacity and infrastructure. Compensating for the energy deficits of wRPS15 could potentially cost tens of billions in additional dollar-expenditure for fossil and / or nuclear generation capacity. There is a real possibility that carbon dioxide and other greenhouse gas (GHG) emission reductions will miss the California ...

  3. 2340 IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY, VOL. 9, NO. 12, DECEMBER 2014 Resilience Analysis of Power Grids

    E-Print Network [OSTI]

    He, Haibo

    also brings risks of catastrophic consequences, e.g., large-scale blackouts. In the current literature can cause large blackout size. Previously, these combinations are ignored by the synchronous attack. NOMENCLATURE M seq Blackout Size of M-node Sequential Attack. M syn Blackout Size of M-node Synchronous Attack

  4. Reduced waste generation, FY 1986

    SciTech Connect (OSTI)

    Not Available

    1986-02-01

    The United States Department of Energy is committed to the principles of minimizing the quantity and transuranic content of its transuranium (TRU) waste being generated at its nuclear facilities. The reasons are to reduce costs associated with waste handling and disposal, and also to reduce radiation exposure to workers and risk for radionuclide release to man and the environment. The purpose of this document is to provide the USDOE with a plan of research and development tasks for waste minimization, and is prepared so as to provide the maximum impact on volumes based on cost/benefit factors. The document is to be updated annually or as needed to reflect current and future tasks. The Reduced Waste Generation (RWG) tasks encompass a wide range of activities with the principal goals of (1) preventing the generation of waste and (2) converting TRU waste into low-level wastes (LLW) by sorting or decontamination. Concepts for reducing the volume such as in incineration and compaction are considered within the discipline of Reduced Waste Generation, but are considered as somewhat developed technology with only a need for implementation. 33 refs.

  5. Gao (xg2193) Survey on Communication System

    E-Print Network [OSTI]

    Lavaei, Javad

    system in a power network can help to prevent a blackout or reduce the cost of a blackout. There are few blackouts in the past that caused by human error could be easily prevented by a management system. Some blackouts introduce by the natural disaster cannot be prevented; however, with the help of a reliable

  6. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Vessel Time Exposure GW-VCU Draft #12;11/21/2013 2 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 RMM 1: Max. Speed of Container Vessels at 17 knots. RMM 2: Reduce Human Error incident on Oil Barges by 50% RMM 3: No Bunkering

  7. Risk Prioritization

    Energy Savers [EERE]

    Quality Managers Software Quality Assurance Subcommittee Reference Document SQAS21.01.00 - 1999 Software Risk Management A Practical Guide February, 2000 Abstract This document is...

  8. Saving Fuel, Reducing Emissions

    E-Print Network [OSTI]

    Kammen, Daniel M.; Arons, Samuel M.; Lemoine, Derek M.; Hummel, Holmes

    2009-01-01

    regenerative braking, as do Saving Fuel, Reducing Emissionsconditions, the expected savings in fuel costs are notis whether the fuel cost savings over the lifetime of the

  9. Saving Fuel, Reducing Emissions

    E-Print Network [OSTI]

    Kammen, Daniel M.; Arons, Samuel M.; Lemoine, Derek M.; Hummel, Holmes

    2009-01-01

    would in turn lower PHEV fuel costs and make them morestretches from fossil-fuel- powered conventional vehiclesbraking, as do Saving Fuel, Reducing Emissions Making Plug-

  10. Enterprise Risk Management Program

    E-Print Network [OSTI]

    Hayden, Nancy J.

    Enterprise Risk Management Program DRAFT Introduction to Enterprise Risk Management at UVM 1 #12;Enterprise Risk Management Program DRAFT What is Enterprise Risk Management? Enterprise risk management governance, and accountability · Facilitates effective management of the uncertainty and associated risks

  11. Risk Management under Liquidity Risk: Liquidity inclusive Risk Measures

    E-Print Network [OSTI]

    Brigo, Damiano

    Risk Management under Liquidity Risk: Liquidity inclusive Risk Measures GARP Seminar, London, Nov://www.capco.com/capco-insights -- Joint work with Claudio Nordio Prof. D. Brigo (Imperial College and Capco) Risk Management under Management under Liquidity Risk GARP Seminar London 2 / 60 #12;Introduction Liquidity in Risk Measurement

  12. Enhancements to Model-reduced Fluid Simulation Dan Gerszewski

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    ]. In this short paper, we present several enhancements to the basic reduced fluid simulation pipeline the training data and requiring signif- icantly less source data without the risk of over-fitting. We treat two

  13. Assessing Risk and Driving Risk Mitigation for First-of-a-Kind Advanced Reactors

    SciTech Connect (OSTI)

    John W. Collins

    2011-09-01

    Planning and decision making amidst programmatic and technological risks represent significant challenges for projects. This presentation addresses the four step risk-assessment process needed to determine clear path forward to mature needed technology and design, license, and construct advanced nuclear power plants, which have never been built before, including Small Modular Reactors. This four step process has been carefully applied to the Next Generation Nuclear Plant. STEP 1 - Risk Identification Risks are identified, collected, and categorized as technical risks, programmatic risks, and project risks, each of which result in cost and schedule impacts if realized. These include risks arising from the use of technologies not previously demonstrated in a relevant application. These risks include normal and accident scenarios which the SMR could experience including events that cause the disablement of engineered safety features (typically documented in Phenomena Identification Ranking Tables (PIRT) as produced with the Nuclear Regulatory Commission) and design needs which must be addressed to further detail the design. Product - Project Risk Register contained in a database with sorting, presentation, rollup, risk work off functionality similar to the NGNP Risk Management System . STEP 2 - Risk Quantification The risks contained in the risk register are then scored for probability of occurrence and severity of consequence, if realized. Here the scoring methodology is established and the basis for the scoring is well documented. Product - Quantified project risk register with documented basis for scoring. STEP 3 - Risk Handling Strategy Risks are mitigated by applying a systematic approach to maturing the technology through Research and Development, modeling, test, and design. A Technology Readiness Assessment is performed to determine baseline Technology Readiness Levels (TRL). Tasks needed to mature the technology are developed and documented in a roadmap. Product - Risk Handling Strategy. STEP 4 - Residual Risk Work off The risk handling strategy is entered into the Project Risk Allocation Tool (PRAT) to analyze each task for its ability to reduce risk. The result is risk-informed task prioritization. The risk handling strategy is captured in the Risk Management System, a relational database that provides conventional database utility, including data maintenance, archiving, configuration control, and query ability. The tool's Hierarchy Tree allows visualization and analyses of complex relationships between risks, risk mitigation tasks, design needs, and PIRTs. Product - Project Risk Allocation Tool and Risk Management System which depict project plan to reduce risk and current progress in doing so.

  14. Reducing the risk, complexity and cost of coiled tubing drilling

    SciTech Connect (OSTI)

    Portman, L.

    1999-07-01

    Drilling vertical well extensions with coiled tubing, particularly in the underbalanced state, exploits the inherent strengths of coiled tubing including: The ability to enter slim holes against a live well head; The use of small equipment that is fast to rig up and down; and The ability to trip quickly and maintain a steady pressure downhole with continuous circulation. Coiled tubing has successfully been used to deepen hundreds of wells, yet this application has only received sporadic attention. There are some very important technical considerations when drilling non-directionally with coiled tubing that must be addressed to ensure a commercially successful job. A recent vertical drilling job carried out in Western Australia illustrates the critical engineering aspects of an underbalanced, non-directional, coiled tubing drilling job. This job was completed for Arc Energy in April 1999 and produced a well that stabilized at 1.1 MMcfd, where three other wells drilled conventionally into these zones had shown only trace amounts of hydrocarbon.

  15. Reducing Cyber Risk to Critical Infrastructure: NIST Framework...

    Office of Environmental Management (EM)

    Order (EO) 13636 "Improving Critical Infrastructure Cybersecurity" of February 2013 directed the National Institute of Standards and Technology (NIST) to work with...

  16. Reducing Your Risk of Foodborne Illness at Home 

    E-Print Network [OSTI]

    Nutrition, Food and

    2008-12-17

    oven, this will partially cook the food. If you thaw food in the microwave, cook it immediately. ? Keep all work surfaces and cutting boards clean. Wash them with hot, soapy water and sanitize them after each use. You can make your own sanitizing...

  17. Scientific Opportunities to Reduce Risk in Nuclear Process Science

    SciTech Connect (OSTI)

    Bredt, Paul R.; Felmy, Andrew R.; Gauglitz, Phillip A.; Hobbs, David T.; Krahn, Steve; Machara, N.; Mcilwain, Michael; Moyer, Bruce A.; Poloski, Adam P.; Subramanian, K.; Vienna, John D.; Wilmarth, B.

    2008-07-18

    Cleaning up the nation’s nuclear weapons complex remains as one of the most technologically challenging and financially costly problems facing the U.S. Department of Energy (DOE). Safety, cost, and technological challenges have often delayed progress in retrieval, processing, and final disposition of high-level waste, spent nuclear fuel, and challenging materials. Some of the issues result from the difficulty and complexity of the technological issues; others have programmatic bases, such as contracting strategies that may provide undue focus on near-term, specific clean-up goals or difficulty in developing and maintaining stakeholder confidence in the proposed solutions. We propose that independent basic fundamental science research focused on the full cleanup life-cycle offers an opportunity to help address these challenges by providing 1) scientific insight into the fundamental mechanisms involved in currently selected processing and disposal options, 2) a rational path to the development of alternative technologies should the primary options fail, 3) confidence that models that predict long-term performance of different disposal options are based upon the best available science, 4) fundamental science discovery that enables transformational solutions to revolutionize the current baseline processes.

  18. Reducing Your Risk of Foodborne Illness at Home (Spanish) 

    E-Print Network [OSTI]

    Nutrition, Food and

    2008-12-17

    alimentaria en casa E-125S 12/08 Programa de Extensi?n en Nutrici?n y Ciencia Alimentaria C ada a?o una persona en cada cuatro en EE. UU. contrae una enfermedad alimentaria (enfermedades transmitidas por alimentos). Los s?ntomas son tan parecidos a los de.... Emitido para el desarrollo del Trabajo de la Extensi?n Cooperativa en Agricultura y Econom?a del Hogar, Leyes del Congreso del 8 de mayo de 1914 con sus reformas y del 30 de junio de 1914 junto con el Departamento de Agricultura de los Estados Unidos...

  19. NREL's Renewable Energy Development Expertise Reduces Project Risks (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-12-01

    This National Renewable Energy Laboratory (NREL) success story fact sheet highlights a June 2012 solar power purchase agreement between the Virgin Islands Water and Power Authority and three corporations. The fact sheet describes how technical assistance from DOE's National Renewable Energy Laboratory enabled the U.S. Virgin Islands to realistically assess its clean energy resources and identify the most viable and cost-effective solutions to its energy challenges--resulting in a $65 million investment in solar energy in the territory.

  20. REDUCING THE RISK FROM VOLCANO HAZARDS UNITED STATES GEOLOGICAL SURVEY

    E-Print Network [OSTI]

    systems, and cause jet engines to fail. USGS and other scientists with the Alaska Volcano Observatory eruptions. As the crew of KLM Flight 867 struggled to restart the plane's engines, "smoke" and a strong odor Mountains(7,000to11,000feethigh).Allfour engines had flamed out when the aircraft in- advertently entered

  1. Smart Phone Technologies Reduce Risks to Eagles from Wind Turbines |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing Tool FitsProjectDataSecretaryDepartment of EnergyDepartment of Energy Smart Phone

  2. Innovative Computational Tools for Reducing Exploration Risk Through

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURING OFFICE INDUSTRIAL TECHNICAL ASSISTANCE SupportsDepartmentInnovation

  3. Reducing Cyber Risk to Critical Infrastructure: NIST Framework | Department

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report Appendices |ProjectKnowRedox Shuttle Additive, Wins 2014Waterof

  4. Annex 2 Risk Guidance Science Programme Office Project Management

    E-Print Network [OSTI]

    1 Annex 2 ­ Risk Guidance Science Programme Office Project Management Guidance on Risk Management and technical performance. However, with appropriate procedures, risks can be managed and in so doing, present as bad things happening. The objective of risk management is to identify, assess, reduce, accept

  5. Reduced shear power spectrum

    SciTech Connect (OSTI)

    Dodelson, Scott; /Fermilab /Chicago U., Astron. Astrophys. Ctr. /Northwestern U.; Shapiro, Charles; /Chicago U. /KICP, Chicago; White, Martin J.; /UC, Berkeley, Astron.

    2005-08-01

    Measurements of ellipticities of background galaxies are sensitive to the reduced shear, the cosmic shear divided by (1-{kappa}) where {kappa} is the projected density field. They compute the difference between shear and reduced shear both analytically and with simulations. The difference becomes more important an smaller scales, and will impact cosmological parameter estimation from upcoming experiments. A simple recipe is presented to carry out the required correction.

  6. Price Risk Management in the Midst of a Credit Crisis 

    E-Print Network [OSTI]

    Welch, Mark; Amosson, Stephen H.; Robinson, John; Falconer, Lawrence

    2009-03-26

    Agricultural producers today face volatile markets, tight credit, economic uncertainty and escalating input costs. Understanding and using risk management tools in this environment can reduce much of the price risk and may improve financial returns....

  7. Adequacy of Power-to-Mass Scaling in Simulating PWR Incident Transient for Reduced-Height, Reduced-Pressure and Full-Height, Full-Pressure Integral System Test Facilities

    SciTech Connect (OSTI)

    Liu, T.-J.; Lee, C.-H

    2004-03-15

    A complete scheme of scaling methods to design the reduced-height, reduced-pressure (RHRP) Institute of Nuclear Energy Research Integral System Test (IIST) facility and to specify test conditions for incident simulation was developed. In order to preserve core decay power history and coolant mass inventory during a transient, a unique power-to-mass scaling method is proposed and utilized for RHRP and full-height, full-pressure (FHFP) systems. To validate the current scaling method, three counterpart tests done at the IIST facility are compared with the FHFP tests in small-break loss-of-coolant, station blackout, and loss-of-feedwater accidents performed at the Large-Scale Test Facility (LSTF) and the BETHSY test facility. Although differences appeared in design, scaling, and operation conditions among the IIST, LSTF, and BETHSY test facilities, the important physical phenomena shown in the facilities are almost the same. The physics involved in incident transient phenomena are well measured and modeled by showing the common thermal-hydraulic behavior of key parameters and the general consistency of chronological events. The results also confirm the adequacy of power-to-mass scaling methodology.

  8. Reducing the Vulnerability of Electric Power Grids to Terrorist Attacks

    SciTech Connect (OSTI)

    Ross Baldick; Thekla Boutsika; Jin Hur; Manho Joung; Yin Wu; Minqi Zhong

    2009-01-31

    This report describes the development of a cascading outage analyzer that, given an initial disturbance on an electric power system, checks for thermal overloads, under-frequency and over-frequency conditions, and under-voltage conditions that would result in removal of elements from the system. The analyzer simulates the successive tripping of elements due to protective actions until a post-event steady state or a system blackout is reached.

  9. Thirty-eighth Hawaii International Conference on System Sciences, January 2005, Big Island, Hawaii. c 2005 IEEE. Branching process models for the exponentially increasing portions of cascading

    E-Print Network [OSTI]

    -Watson and Markov branching processes are related to the timing of failures and this extends previous work of blackouts and offers a number of possibilities for understanding and monitoring the risk of large blackouts

  10. IEEE Power Engineering Society General Meeting, Tampa FL USA, June 2007 Where is the edge for cascading failure?: challenges

    E-Print Network [OSTI]

    for cascading failure?: challenges and opportunities for quantifying blackout risk Ian Dobson, Fellow IEEE Abstract-- Quantifying the overall risk of blackout due to cascading failure and determining the corresponding safe limits for power system design and operation are challenging problems. Large blackouts

  11. Dynamical systems probabilistic risk assessment.

    SciTech Connect (OSTI)

    Denman, Matthew R.; Ames, Arlo Leroy

    2014-03-01

    Probabilistic Risk Assessment (PRA) is the primary tool used to risk-inform nuclear power regulatory and licensing activities. Risk-informed regulations are intended to reduce inherent conservatism in regulatory metrics (e.g., allowable operating conditions and technical specifications) which are built into the regulatory framework by quantifying both the total risk profile as well as the change in the risk profile caused by an event or action (e.g., in-service inspection procedures or power uprates). Dynamical Systems (DS) analysis has been used to understand unintended time-dependent feedbacks in both industrial and organizational settings. In dynamical systems analysis, feedback loops can be characterized and studied as a function of time to describe the changes to the reliability of plant Structures, Systems and Components (SSCs). While DS has been used in many subject areas, some even within the PRA community, it has not been applied toward creating long-time horizon, dynamic PRAs (with time scales ranging between days and decades depending upon the analysis). Understanding slowly developing dynamic effects, such as wear-out, on SSC reliabilities may be instrumental in ensuring a safely and reliably operating nuclear fleet. Improving the estimation of a plant's continuously changing risk profile will allow for more meaningful risk insights, greater stakeholder confidence in risk insights, and increased operational flexibility.

  12. Serum 25-hydroxyvitamin D and risk of breast cancer

    E-Print Network [OSTI]

    Mohr, Sharif Burgette

    2012-01-01

    and prevention of breast cancer: pooled analysis. Anticancerand reduced risk of breast cancer: a population-based case-between vitamin D and breast cancer incidence and natural

  13. Comparing Product Development Processes and Managing Risk

    E-Print Network [OSTI]

    Unger, Darian W.

    Product Development Processes (PDPs) require careful design to reduce development time, create better products and manage the risks of bringing new products to market. This paper investigates the relationship between product ...

  14. Supply Chain Supernetworks Suppliers Risk Diversification

    E-Print Network [OSTI]

    Nagurney, Anna

    Supply Chain Supernetworks with Suppliers Risk Diversification June Dong School of Business State #12;Reliable Supply Chain Starts from reliable suppliers Supplier selection multicriteria Benefits vs.Risks #12;Suppliers Selection Single source Improved bargaining power to reduce costs Decreased effort

  15. Ecological Risk Assessments

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

    Ecological Risk Assessments Ecological Risk Assessments Ecological risk assessment is the appraisal of potential adverse effects of exposure to contaminants on plants and animals....

  16. Reducing Configuration Complexity

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested PartiesBuildingBudgetFinancial Opportunities » Pastams AG 2015 Reducing

  17. Naval electrochemical corrosion reducer

    DOE Patents [OSTI]

    Clark, Howard L. (Ballston Lake, NY)

    1991-10-01

    A corrosion reducer for use with ships having a hull, a propeller mounted a propeller shaft and extending through the hull, bearings supporting the shaft, at least one thrust bearing and one seal. The improvement includes a current collector and a current reduction assembly for reducing the voltage between the hull and shaft in order to reduce corrosion due to electrolytic action. The current reduction assembly includes an electrical contact, the current collector, and the hull. The current reduction assembly further includes a device for sensing and measuring the voltage between the hull and the shaft and a device for applying a reverse voltage between the hull and the shaft so that the resulting voltage differential is from 0 to 0.05 volts. The current reduction assembly further includes a differential amplifier having a voltage differential between the hull and the shaft. The current reduction assembly further includes an amplifier and a power output circuit receiving signals from the differential amplifier and being supplied by at least one current supply. The current selector includes a brush assembly in contact with a slip ring over the shaft so that its potential may be applied to the differential amplifier.

  18. Model-based Risk Assessment What does model-based mean?

    E-Print Network [OSTI]

    Stølen, Ketil

    Model-based Risk Assessment What does model-based mean? Model-based means based on modelling keeping a good overview at the same time. What does Risk Assessment mean? A risk assessment is a process to change the system in order to reduce these indicated risks. Why Risk Assessment? IT-systems get bigger

  19. Enterprise Risk Management Program

    E-Print Network [OSTI]

    Hayden, Nancy J.

    Enterprise Risk Management Program Guide to Risk Assessment & Response August 16, 2012 #12; i ...........26 List of Figures Figure 1: The Risk Management Process.......................................................................................................12 #12; 1 Overview The risk management process--of identifying, analyzing, evaluating

  20. Site Risks:

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effect Photovoltaics -7541 UnlimitedShiftwater vaporRisks: ï‚· Radiation - alpha,

  1. Advanced Test Reactor outage risk assessment

    SciTech Connect (OSTI)

    Thatcher, T.A.; Atkinson, S.A.

    1997-12-31

    Beginning in 1997, risk assessment was performed for each Advanced Test Reactor (ATR) outage aiding the coordination of plant configuration and work activities (maintenance, construction projects, etc.) to minimize the risk of reactor fuel damage and to improve defense-in-depth. The risk assessment activities move beyond simply meeting Technical Safety Requirements to increase the awareness of risk sensitive configurations, to focus increased attention on the higher risk activities, and to seek cost-effective design or operational changes that reduce risk. A detailed probabilistic risk assessment (PRA) had been performed to assess the risk of fuel damage during shutdown operations including heavy load handling. This resulted in several design changes to improve safety; however, evaluation of individual outages had not been performed previously and many risk insights were not being utilized in outage planning. The shutdown PRA provided the necessary framework for assessing relative and absolute risk levels and assessing defense-in-depth. Guidelines were written identifying combinations of equipment outages to avoid. Screening criteria were developed for the selection of work activities to receive review. Tabulation of inherent and work-related initiating events and their relative risk level versus plant mode has aided identification of the risk level the scheduled work involves. Preoutage reviews are conducted and post-outage risk assessment is documented to summarize the positive and negative aspects of the outage with regard to risk. The risk for the outage is compared to the risk level that would result from optimal scheduling of the work to be performed and to baseline or average past performance.

  2. Risk Management, Mar 2012 Risk Management

    E-Print Network [OSTI]

    Risk Management, Mar 2012 Risk Management Conditions of Volunteer Service (Please send completed form to the Office of Risk Management) riskmanagement@uoregon.edu Fax: 541-346-7008 As a volunteer Tort Claims Act, ORS 30.260-300, and Oregon Department of Administrative Services Risk Management

  3. Pressure reducing regulator

    DOE Patents [OSTI]

    Whitehead, John C. (Davis, CA); Dilgard, Lemoyne W. (Willits, CA)

    1995-01-01

    A pressure reducing regulator that controls its downstream or outlet pressure to a fixed fraction of its upstream or inlet pressure. The regulator includes a housing which may be of a titanium alloy, within which is located a seal or gasket at the outlet end which may be made of annealed copper, a rod, and piston, each of which may be made of high density graphite. The regulator is insensitive to temperature by virtue of being without a spring or gas sealed behind a diaphragm, and provides a reference for a system in which it is being used. The rod and piston of the regulator are constructed, for example, to have a 1/20 ratio such that when the downstream pressure is less than 1/20 of the upstream pressure the regulator opens and when the downstream pressure exceeds 1/20 of the upstream pressure the regulator closes.

  4. Pressure reducing regulator

    DOE Patents [OSTI]

    Whitehead, J.C.; Dilgard, L.W.

    1995-10-10

    A pressure reducing regulator that controls its downstream or outlet pressure to a fixed fraction of its upstream or inlet pressure is disclosed. The regulator includes a housing which may be of a titanium alloy, within which is located a seal or gasket at the outlet end which may be made of annealed copper, a rod, and piston, each of which may be made of high density graphite. The regulator is insensitive to temperature by virtue of being without a spring or gas sealed behind a diaphragm, and provides a reference for a system in which it is being used. The rod and piston of the regulator are constructed, for example, to have a 1/20 ratio such that when the downstream pressure is less than 1/20 of the upstream pressure the regulator opens and when the downstream pressure exceeds 1/20 of the upstream pressure the regulator closes. 10 figs.

  5. Reducing Penguin Pollution

    E-Print Network [OSTI]

    Bhubanjyoti Bhattacharya; Alakabha Datta; David London

    2013-04-29

    The most common decay used for measuring 2beta_s, the phase of Bs-Bsbar mixing, is Bs -> J/psi phi. This decay is dominated by the colour-suppressed tree diagram, but there are other contributions due to gluonic and electroweak penguin diagrams. These are often referred to as "penguin pollution" (PP) because their inclusion in the amplitude leads to a theoretical error in the extraction of 2beta_s from the data. In the standard model (SM), it is estimated that the PP is negligible, but there is some uncertainty as to its exact size. Now, phi_s^{c\\bar{c}s} (the measured value of 2beta_s) is small, in agreement with the SM, but still has significant experimental errors. When these are reduced, if one hopes to be able to see clear evidence of new physics (NP), it is crucial to have the theoretical error under control. In this paper, we show that, using a modification of the angular analysis currently used to measure phi_s^{c\\bar{c}s} in Bs -> J/psi phi, one can reduce the theoretical error due to PP. Theoretical input is still required, but it is much more modest than entirely neglecting the PP. If phi_s^{c\\bar{c}s} differs from the SM prediction, this points to NP in the mixing. There is also enough information to test for NP in the decay. This method can be applied to all Bs/Bsbar -> V1 V2 decays.

  6. Boise State University Office of Risk Management & Insurance

    E-Print Network [OSTI]

    Barrash, Warren

    Boise State University Office of Risk Management & Insurance Motor Vehicle Record Guidelines INTRODUCTION These procedures are linked to University policy #7005. Vehicle operations create substantial risk. A best practice for reducing vehicle risk is to ensure only safe drivers are allowed to operate vehicles

  7. Research Article Automating Risk Analysis of Software Design Models

    E-Print Network [OSTI]

    Miller, Barton P.

    Research Article Automating Risk Analysis of Software Design Models Maxime Frydman,1 Guifré Ruiz,2 to reduce the need for costly human expertise to perform risk analysis in software, which is common of these secure development methodologies share one essential risk analysis activity, called threat modeling [4

  8. EPA 402-R-93-076 ESTIMATING RADIOGENIC CANCER RISKS

    E-Print Network [OSTI]

    comparing health risk estimates due to low level exposures of low-LET radiation based on models recently This document presents a revised methodology for EPA's estimation of cancer risks due to low-LET radiation. With the exception of breast cancer, low-LET radiogenic cancer risks are assumed to be reduced by a dose and dose

  9. Kansas Citys, Missouri and Kansas Flood Risk Management Project

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Kansas Citys, Missouri and Kansas Flood Risk Management Project 22 April 2014 ABSTRACT: The existing Kansas Citys, Missouri and Kansas, Flood Risk Management Project consists of seven levee units. This study evaluated whether one or more plans for reducing flood risk and increasing levee reliability

  10. CEDAR RIVER, CEDAR RAPIDS, IOWA, FLOOD RISK MANAGEMENT PROJECT

    E-Print Network [OSTI]

    US Army Corps of Engineers

    CEDAR RIVER, CEDAR RAPIDS, IOWA, FLOOD RISK MANAGEMENT PROJECT 18 November 2010 ABSTRACT flood risk management (FRM) for the City of Cedar Rapids, Iowa. The project consists of a floodwall and levee system to reduce the existing and future flood risk and damages to public and private

  11. SUTTER BASIN, SUTTER & BUTTE COUNTIES, CA FLOOD RISK MANAGEMENT PROJECT

    E-Print Network [OSTI]

    US Army Corps of Engineers

    SUTTER BASIN, SUTTER & BUTTE COUNTIES, CA FLOOD RISK MANAGEMENT PROJECT 22 October 2013 ABSTRACT: The purpose of the Sutter Basin Project is to reduce overall flood risk to the Sutter Basin study area the risk to property damage due to flooding to the Sutter Basin area located in the Sutter and Butte

  12. Fast Simulation, Monitoring, and Mitigation of Cascading Failure

    E-Print Network [OSTI]

    blackout. Large cascading failures are not frequent, but they have substantial risk due to their large societal costs. The August 2003 cascading blackout of portions of the northeastern U.S. and eastern Canada had direct costs of the order of $6-$10 billion. Large blackouts can also have significant indirect

  13. Stewarding a Reduced Stockpile

    SciTech Connect (OSTI)

    Goodwin, B T; Mara, G

    2008-04-18

    The future of the US nuclear arsenal continues to be guided by two distinct drivers: the preservation of world peace and the prevention of further proliferation through our extended deterrent umbrella. Timely implementation of US nuclear policy decisions depends, in part, on the current state of stockpile weapons, their delivery systems, and the supporting infrastructure within the Department of Defense (DoD) and the Department of Energy's National Nuclear Security Administration (NNSA). In turn, the present is a product of past choices and world events. Now more than ever, the nuclear weapons program must respond to the changing global security environment and to increasing budget pressures with innovation and sound investments. As the nation transitions to a reduced stockpile, the successes of the Stockpile Stewardship Program (SSP) present options to transition to a sustainable complex better suited to stockpile size, national strategic goals and budgetary realities. Under any stockpile size, we must maintain essential human capital, forefront capabilities, and have a right-sized effective production capacity. We present new concepts for maintaining high confidence at low stockpile numbers and to effectively eliminate the reserve weapons within an optimized complex. We, as a nation, have choices to make on how we will achieve a credible 21st century deterrent.

  14. Risk Management Policy 1 Risk Management Policy (December, 2014)

    E-Print Network [OSTI]

    Wapstra, Erik

    Risk Management Policy 1 Risk Management Policy (December, 2014) Risk Management Policy Responsible Governance Level Principle No. 2 - Risk Management Responsible Organisational Unit Audit & Risk CONTENTS 1 ........................................................................................................2 3.1 Effective Risk Management

  15. Risk Management Strategy Introduction

    E-Print Network [OSTI]

    Edinburgh, University of

    Risk Management Strategy Introduction 1. The risk of adverse consequences is inherent in all activity. Dynamic enterprise will inevitably create new risks. Risk management is about ensuring that all significant relevant risks are understood and prioritised as part of normal management

  16. Applications for Coal and Natural Gas Power Plants in a Smart...

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

    Reduced SO X , NO X , and PM-10 Emissions (society) Security Energy Security Reduced Oil Usage (society) Reduced Wide-scale Blackouts (society) . *Methodological Approach for...

  17. Reducing gas generators and methods for generating a reducing gas

    SciTech Connect (OSTI)

    Scotto, Mark Vincent; Perna, Mark Anthony

    2015-11-03

    One embodiment of the present invention is a unique reducing gas generator. Another embodiment is a unique method for generating a reducing gas. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for generating reducing gas. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.

  18. SciTech Connect: "August 2003 blackout"

    Office of Scientific and Technical Information (OSTI)

    CA (United States) Office of Economic Impact and Diversity Office of Environmental Management-Consolidated Business Center Office of Groundwater and Soil Remediation Office...

  19. August 2003 Blackout | Department of Energy

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

    and New Jersey west to Michigan, and from Ohio north to Toronto and Ottawa, Ontario. Approximately 50 million customers were impacted, and the economic costs will be...

  20. August 2003 Blackout | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels DataEnergy Webinar:I Due DateOpportunityManual Audit Manual1

  1. Risk Dynamics?An Analysis for the Risk of Change

    E-Print Network [OSTI]

    Huang, Tailin

    2010-01-01

    Risk Assessment?" Risk Analysis, Aubrey, A. (2010). "T. (2003). Foundations of Risk Analysis : A Knowledge andNJ. Ayyub, B. M. (2003). Risk Analysis in Engineering and

  2. Risk and robust optimization

    E-Print Network [OSTI]

    Brown, David Benjamin, Ph. D. Massachusetts Institute of Technology

    2006-01-01

    This thesis develops and explores the connections between risk theory and robust optimization. Specifically, we show that there is a one-to-one correspondence between a class of risk measures known as coherent risk measures ...

  3. Why Risk Assessment? Because ...

    E-Print Network [OSTI]

    Stølen, Ketil

    Why Risk Assessment? Because ... CORAS is committed to supporting international industry can take advantage of the CORAS technology in order to give their mission critical risk assessment assessment methodology integrating techniques and features from partly complementary risk assessment methods

  4. Adjunctive rifampicin to reduce early mortality from Staphylococcus aureus bacteraemia (ARREST): study protocol for a randomised controlled trial

    E-Print Network [OSTI]

    Thwaites, Guy; Auckland, Cressida; Barlow, Gavin; Cunningham, Richard; Davies, Gerry; Edgeworth, Jonathan; Greig, Julia; Hopkins, Susan; Jeyaratnam, Dakshika; Jenkins, Neil; Llewelyn, Martin; Meisner, Sarah; Nsutebu, Emmanuel; Planche, Tim; Read, Robert C.; Scarborough, Matthew; Soares, Marta; Tilley, Robert; Török, M. Estée; Williams, John; Wilson, Peter; Wyllie, Sarah; Walker, A. Sarah; United Kingdom Clinical Infection Research Group

    2012-12-18

    -line antibiotic, will enhance killing of S. aureus early in the treatment course, sterilise infected foci and blood faster, and thereby reduce the risk of dissemination, metastatic infection and death. Our aim is to determine whether adjunctive rifampicin reduces...

  5. BUILDING A RISK MANAGEMENT PLAN BUILDING A RISK MANAGEMENT PL LDING A RISK MANAGEMENT PLAN BUILDING A RISK MANAGEMENT PLAN

    E-Print Network [OSTI]

    Florida, University of

    BUILDING A RISK MANAGEMENT PLAN BUILDING A RISK MANAGEMENT PL LDING A RISK MANAGEMENT PLAN BUILDING A RISK MANAGEMENT PLAN MANAGEMENT PLAN BUILDING A RISK MANAGEMENT PLAN BUILDING A R RISK MANAGEMENT PLAN BUILDING A RISK MANAGEMENT PLAN BUILDIN T PLAN BUILDING A RISK MANAGEMENT PLAN BUILDING A RISK MANAGEM

  6. NASA TM-2012-217361 Evaluating Shielding Approaches to Reduce

    E-Print Network [OSTI]

    Rathbun, Julie A.

    NASA TM-2012-217361 Evaluating Shielding Approaches to Reduce Space Radiation Cancer Risks Francis A. Cucinotta NASA Lyndon B. Johnson Space Center Houston, Texas Myung-Hee Y. Kim U.S.R.A., Division, Texas May 2012 #12;THE NASA STI PROGRAM OFFICE . . . IN PROFILE Since its founding, NASA has been

  7. Enterprise Risk Management Framework

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

    Framework The Enterprise Risk Management (ERM) framework includes four steps: identify the risks, determine the probability and impact of each one, identify controls that are...

  8. Econometric Feedback for Runtime Risk Management in VoIP Architectures

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Econometric Feedback for Runtime Risk Management in VoIP Architectures Oussema Dabbebi, R. Risk management provides new perspectives for addressing this issue. Risk models permit to reduce-configuration strategy for support- ing runtime risk management in VoIP architectures. This strategy aims

  9. RISK JOURNALS CATALOGUE 2015 www.risk.net/journal

    E-Print Network [OSTI]

    RISK JOURNALS CATALOGUE 2015 www.risk.net/journal #12;Risk Journals deliver academically rigorous accurately. DISCOVER RISK JOURNALS HOW CAN RISK JOURNALS HELP YOU? www.risk.net/journal Risk Journals deliver strategies, commodities, infrastructures, derivatives, regulation and more. Each quarter Risk Journals

  10. Hanford waste vitrification systems risk assessment

    SciTech Connect (OSTI)

    Miller, W.C.; Hamilton, D.W.; Holton, L.K.; Bailey, J.W.

    1991-09-01

    A systematic Risk Assessment was performed to identify the technical, regulatory, and programmatic uncertainties and to quantify the risks to the Hanford Site double-shell tank waste vitrification program baseline (as defined in December 1990). Mitigating strategies to reduce the overall program risk were proposed. All major program elements were evaluated, including double-shell tank waste characterization, Tank Farms, retrieval, pretreatment, vitrification, and grouting. Computer-based techniques were used to quantify risks to proceeding with construction of the Hanford Waste Vitrification Plant on the present baseline schedule. Risks to the potential vitrification of single-shell tank wastes and cesium and strontium capsules were also assessed. 62 refs., 38 figs., 26 tabs.

  11. Risk Assessment Sally Brown

    E-Print Network [OSTI]

    Brown, Sally

    or publicly owned treatment works) whose regulations and rule enforcement work to make sure that the risksRisk Assessment Sally Brown University of Washington Risk in our day to day routines One could argue that every thing that we do, every day is fraught with risks and that the safest approach is just

  12. Risk Assessment Fact Sheet

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Risk Assessment ® Fact Sheet U.S. Army Corps of Engineers Building Strong ® Buffalo District June 2012 Risk Assessment A risk assessment is performed for hazardous, toxic, and radioactive waste sites and chemicals in the environment. Information from the risk assessment is used to determine whether action

  13. Risk communications & emergency planning

    SciTech Connect (OSTI)

    Baranski, S.C. [EQUINOX Environmental, Inc., Shushan, NY (United States)

    1995-12-31

    This talk outlines the interface between good risk communication and emergency planning. The major topics include the following: What is risk communication and how is it applied to emergency planning; crisis communication and the need to know and how to integrate crisis communication and risk communication; the face of the emergency: spokespersons, public information; The Media`s role in emergency Public information and risk communication; Developing the risk communication message; How to respond to continuing need for 24 hours communications; the EAS and Risk communication and Crisis communication; and finally where is risk communication heading and how it can help.

  14. Oxygen-reducing catalyst layer

    DOE Patents [OSTI]

    O'Brien, Dennis P. (Maplewood, MN); Schmoeckel, Alison K. (Stillwater, MN); Vernstrom, George D. (Cottage Grove, MN); Atanasoski, Radoslav (Edina, MN); Wood, Thomas E. (Stillwater, MN); Yang, Ruizhi (Halifax, CA); Easton, E. Bradley (Halifax, CA); Dahn, Jeffrey R. (Hubley, CA); O'Neill, David G. (Lake Elmo, MN)

    2011-03-22

    An oxygen-reducing catalyst layer, and a method of making the oxygen-reducing catalyst layer, where the oxygen-reducing catalyst layer includes a catalytic material film disposed on a substrate with the use of physical vapor deposition and thermal treatment. The catalytic material film includes a transition metal that is substantially free of platinum. At least one of the physical vapor deposition and the thermal treatment is performed in a processing environment comprising a nitrogen-containing gas.

  15. Reduced

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100 Winners * Impactsand engineersAcquisition andRedox ShuttleRedox

  16. Hit or Miss: Regulating Derivative Markets to Reduce Hedging Costs at Non-Financial Companies

    E-Print Network [OSTI]

    Parsons, J.E.

    Derivative markets are an important tool enabling non?financial companies to reduce their risk and manage their financing. Effective regulation of these markets can lower companies hedging costs and help improve productivity. ...

  17. Reducing whole-body vibration and musculoskeletal injury with a new car seat

    E-Print Network [OSTI]

    , may reduce the risk of WBV-related musculoskeletal disorders among drivers. Keywords: Whole States (US Department of Labor 2003). Those whose occupations involve extended periods of driving, i.e. transit operators, truck, taxi and bus drivers, are at high risk for developing chronic musculoskeletal

  18. Industrial Energy Efficiency as a Risk Management Strategy 

    E-Print Network [OSTI]

    Naumoff, C.; Shipley, A. M.

    2007-01-01

    portfolio. Traditional strategies to combat against unwanted exposure in this market include hedging and long term and futures contracts. However, the following explores the topic of considering energy efficiency as a risk management tool in reducing...

  19. RISK AVERSION AND TECHNOLOGY PORTFOLIOS Guy MEUNIER

    E-Print Network [OSTI]

    Boyer, Edmond

    in a technology with a positive expected return. If the technology with the lower expected cost is more risky than to produce with each technology. One technology has a lower expected marginal cost than the other, and costly technology to reduce its risk. The influence of correlation is emphasized. As the supply

  20. Rangeland Risk Management for Texans: Types of Risk 

    E-Print Network [OSTI]

    White, Larry D.; Hanselka, C. Wayne

    2000-11-01

    Types of risk associated with range ecosystems include climatic, biological, financial and political risks. These risks are explained so that managers can know how to handle them....

  1. State Energy Risk Assessment Initiative - State Energy Risk Profiles...

    Energy Savers [EERE]

    Mission Energy Infrastructure Modeling and Analysis State Energy Risk Assessment Initiative - State Energy Risk Profiles State Energy Risk Assessment Initiative - State...

  2. Development of a Societal-Risk Goal for Nuclear Power Safety

    SciTech Connect (OSTI)

    Vicki Bier; Michael Corradini; Robert Youngblood; Caleb Roh; Shuji Liu

    2014-06-01

    The safety-goal policy of the Nuclear Regulatory Commission (NRC) has never included a true societal-risk goal. The NRC did acknowledge that the original goal for the risk of latent cancer facilities “was an individual risk goal not related to the number of people involved,” and stated that “a true societal risk goal would place a limit on the aggregate number of people affected.” However, this limitation was never satisfactorily addressed. Moreover, the safety goal has historically focused primarily on fatalities and latent health effects, while experience with actual nuclear accidents has shown that societal disruption can be significant even in accidents that yield only small to modest numbers of fatalities. Therefore, we have evaluated the social disruption effects from severe reactor accidents as a basis to develop a societal-risk goal for nuclear power plants, considering both health effects and non-health concerns such as property damage and land interdiction. Our initial analysis considered six different nuclear power plant sites in the U.S. for Boiling Water Reactors and Pressurized Water Reactors. The accident sequences considered for these two reactor types were station blackout sequences (both short-term and long-term SBO) as well as an STSBO with RCIC failure for the BWR and a Steam Generator Tube Rupture for the PWR. The source term release was an input in a RASCAL calculation of the off-site consequences using actual site-based weather data for each of the six plant sites randomly selected over a two-year period. The source term release plumes were then compared to Geographical Information System data for each site to determine the population affected and that would need to be evacuated to meet current emergency preparedness regulations. Our results to date suggest that number of people evacuated to meet current protective action guidelines appears to be a good proxy for disruption -- and, unlike other measures of disruption, has the advantage of being relatively straightforward to calculate for a given accident scenario and a given geographical location and plant site. Revised safety goals taking into account the potential for societal disruption could in principle be applied to the current generation of nuclear plants, but could also be used in evaluating and siting new technologies, such as small modular light water reactors, advanced Gen-IV high-temperature reactors, as well as reactor designs with passive safety features such as filtered vented containments.

  3. Reduced shedding regenerator and method

    DOE Patents [OSTI]

    Qiu, Songgang (Richland, WA); Augenblick, John E. (Richland, WA); Erbeznik, Raymond M. (Kennewick, WA)

    2007-05-22

    A reduced shedding regenerator and method are disclosed with regenerator surfaces to minimize shedding of particles from the regenerator thereby alleviating a source of potential damage and malfunction of a thermal regenerative machine using the regenerator.

  4. The combinatorics of reduced decompositions

    E-Print Network [OSTI]

    Tenner, Bridget Eileen

    2006-01-01

    This thesis examines several aspects of reduced decompositions in finite Coxeter groups. Effort is primarily concentrated on the symmetric group, although some discussions are subsequently expanded to finite Coxeter groups ...

  5. risk management annual report

    E-Print Network [OSTI]

    Frantz, Kyle J.

    ____________________________________________________________________ 2 The ERM Process______________________________________________________________________ 28 The ERM Process in 2014 and Beyond and mitigating the risks that threaten its mission, the Office of Enterprise Risk Management (ERM) was tasked

  6. Finance and Risk & ENGINEERING

    E-Print Network [OSTI]

    Aronov, Boris

    Finance and Risk & ENGINEERING Charles S. Tapiero Department Head and Morton and Angela Topfer · Corporate Finance and Financial Markets · Computational Finance · Risk Finance · Technology and Algorithmic Finance A Collective Leadership Students participation #12;RESEARCH STRENGTHS · Black Swans and Fragility

  7. Uncertainty, Subjectivity, Trust and Risk: How It All Fits Together

    E-Print Network [OSTI]

    Stølen, Ketil

    Uncertainty, Subjectivity, Trust and Risk: How It All Fits Together Bjørnar Solhaug1 and Ketil uncertainty, subjective, objective, trust, risk, trust management. 1 Aleatory Uncertainty vs. Epistemic be reduced by narrowing the interval and thereby making a more precise prediction. 2 Objective vs. Subjective

  8. Learning and risk aversion 

    E-Print Network [OSTI]

    Oyarzun, Carlos

    2009-06-02

    This dissertation contains three essays on learning and risk aversion. In the first essay we consider how learning may lead to risk averse behavior. A learning rule is said to be risk averse if it is expected to add more probability to an action...

  9. February 2002 RISK MANAGEMENT

    E-Print Network [OSTI]

    February 2002 RISK MANAGEMENT GUIDANCE FOR INFORMATION TECHNOLOGY SYSTEMS By Joan S. Hash, Computer is the ability to iden tify and protect critical information assets. A sound risk management pro gram-30, Risk Management Guide For Information Technology Systems, by Gary Stoneburner, Alice Goguen, and Alexis

  10. Proceedings of the 1998 USCOLD Annual Lecture, Buffalo, New York. August 1998 PORTFOLIO RISK ASSESSMENT: A TOOL FOR DAM SAFETY RISK MANAGEMENT

    E-Print Network [OSTI]

    Bowles, David S.

    ASSESSMENT: A TOOL FOR DAM SAFETY RISK MANAGEMENT David S. Bowles1 , Loren R. Anderson2 , Terry F. Glover3 on to provide the basis for an effective and efficient program for managing and reducing dam safety risksProceedings of the 1998 USCOLD Annual Lecture, Buffalo, New York. August 1998 PORTFOLIO RISK

  11. NISTIR 8023 Risk Management for

    E-Print Network [OSTI]

    with replication devices. Keywords 3D printers; 3D scanners; copiers; countermeasures; exploits; mitigation; multifunction devices; printers; replication devices; risk; risk assessment; risk management; scanners; security

  12. Sandia Energy - Probabilistic Risk Assessment

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

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

  13. Sandia Energy - Security Risk Assessment

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

    Security Risk Assessment Home Climate & Earth Systems WaterEnergy Nexus Water Monitoring & Treatment Technology Security Risk Assessment Security Risk Assessmentcwdd2015-05-04T21:...

  14. Risk assessment as a framework for decisions.

    SciTech Connect (OSTI)

    Rechard, Robert Paul; McKenna, Sean Andrew; Borns, David James

    2010-12-01

    The risk assessment approach has been applied to support numerous radioactive waste management activities over the last 30 years. A risk assessment methodology provides a solid and readily adaptable framework for evaluating the risks of CO2 sequestration in geologic formations to prioritize research, data collection, and monitoring schemes. This paper reviews the tasks of a risk assessment, and provides a few examples related to each task. This paper then describes an application of sensitivity analysis to identify important parameters to reduce the uncertainty in the performance of a geologic repository for radioactive waste repository, which because of importance of the geologic barrier, is similar to CO2 sequestration. The paper ends with a simple stochastic analysis of idealized CO2 sequestration site with a leaking abandoned well and a set of monitoring wells in an aquifer above the CO2 sequestration unit in order to evaluate the efficacy of monitoring wells to detect adverse leakage.

  15. D:\0myfiles\Blackout Progress\Blackout-Progress.vp | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p aDepartmentEnergyEveryCustomer ServiceVisualization81August

  16. D:\0myfiles\DOE Policy (LBL) Blackout Final\final-blackout-body-xx.vp

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p aDepartmentEnergyEveryCustomer ServiceVisualization81AugustCanada

  17. Blackout 2003: Final Report on the August 14, 2003 Blackout in the United

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBio Centers Announcementand TheBiota Biotaof theStates

  18. Blackout 2003: The August 14, 2003 Blackout One Year Later: Actions Taken

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBio Centers Announcementand TheBiota Biotaofin the United

  19. Blackout 2003: U.S. - Canada Task Force Presents Final Report onBlackout of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBio Centers Announcementand TheBiota Biotaofin theAugust

  20. Reduce air, reduce compliance cost new patented spray booth technology

    SciTech Connect (OSTI)

    McGinnis, F.

    1997-12-31

    A New Paint Spray Booth System that dramatically reduces air volumes normally required for capturing and controlling paint overspray that contains either Volatile Organic Compounds (VOC) or Hazardous Air Pollutants (HAP), or both. In turn, a substantial reduction in capital equipment expenditures for air abatement systems and air make-up heaters as well as related annual operating expenses is realized.

  1. adopt our eco-driving top tips to reduce fuel costs

    E-Print Network [OSTI]

    Harman, Neal.A.

    adopt our eco-driving top tips to reduce fuel costs and accident risk Drive smoothly · Anticipate this will activate the fuel cut-off switch, reducing fuel flow to virtually zero. Shift up early · When accelerating, when appropriate. Avoid excessive speed High speeds greatly increase fuel consumption. Keep tyres

  2. Microbial methods of reducing technetium

    DOE Patents [OSTI]

    Wildung, Raymond E. (Richland, WA) [Richland, WA; Garland, Thomas R. (Greybull, WY) [Greybull, WY; Gorby, Yuri A. (Richland, WA) [Richland, WA; Hess, Nancy J. (Benton City, WA) [Benton City, WA; Li, Shu-Mei W. (Richland, WA) [Richland, WA; Plymale, Andrew E. (Richland, WA) [Richland, WA

    2001-01-01

    The present invention is directed toward a method for microbial reduction of a technetium compound to form other compounds of value in medical imaging. The technetium compound is combined in a mixture with non-growing microbial cells which contain a technetium-reducing enzyme system, a stabilizing agent and an electron donor in a saline solution under anaerobic conditions. The mixture is substantially free of an inorganic technetium reducing agent and its reduction products. The resulting product is Tc of lower oxidation states, the form of which can be partially controlled by the stabilizing agent. It has been discovered that the microorganisms Shewanella alga, strain Bry and Shewanelia putrifacians, strain CN-32 contain the necessary enzyme systems for technetium reduction and can form both mono nuclear and polynuclear reduced Tc species depending on the stabilizing agent.

  3. Risk Assessment Coherent Risks: An Axiomatic Approach Relation with Cooperative Game Concluding Remarks Risk, Coherency and Cooperative Game

    E-Print Network [OSTI]

    Li, Haijun

    Risk Assessment Coherent Risks: An Axiomatic Approach Relation with Cooperative Game Concluding 2011 1 / 30 #12;Risk Assessment Coherent Risks: An Axiomatic Approach Relation with Cooperative Game Concluding Remarks Outline 1 Risk Assessment Risk = Volatility? Modern Portfolio Theory (MPT) Risk

  4. Unconventional Groundwater System Proves Effective in Reducing...

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

    Unconventional Groundwater System Proves Effective in Reducing Contamination at West Valley Demonstration Project Unconventional Groundwater System Proves Effective in Reducing...

  5. Risk Policy and Risk Management Procedures The University's Risk Policy sets out The University's approach to risk and its

    E-Print Network [OSTI]

    Aickelin, Uwe

    Risk Policy and Risk Management Procedures Preface The University's Risk Policy sets out The University's approach to risk and its management together with the means for identifying, analysing and managing risk in order to minimise its frequency and impact. The risks considered significant

  6. Professional Certificate in Risk Management

    E-Print Network [OSTI]

    Carleton University

    Professional Certificate in Risk Management 2010 Program 3 Part-time Courses CRM01: Essentials of Risk Management ­ Next Session Fall 2010 CRM02: Risk Control ­ Jan. 12 - April 26, 2010 CRM03: Risk to apply for the Canadian Risk Management (CRM) designation. #12;Professional Certificate in Risk

  7. Reduced Harmonic Representation of Partitions

    E-Print Network [OSTI]

    Michalis Psimopoulos

    2011-03-08

    In the present article the reduced integral representation of partitions in terms of harmonic products has been derived first by using hypergeometry and the new concept of fractional sum and secondly by studying the Fourier series of the kernel function appearing in the integral representation. Using the method of induction, a generalization of the theory has also been obtained.

  8. CORRESPONDENCE Reduced major axis regression

    E-Print Network [OSTI]

    CORRESPONDENCE Reduced major axis regression and the island rule The Ôisland ruleÕ describes). The slope of the least-squares regression of Y on X, b, measures the extent to which large body sizes tend- ferent way, as the regression of Y ) X on X, and here the slope (b¢) is generally negative (b¢ = b ) 1

  9. Reduced-vibration tube array

    DOE Patents [OSTI]

    Bruck, Gerald J.; Bartolomeo, Daniel R.

    2004-07-20

    A reduced-vibration tube array is disclosed. The array includes a plurality of tubes in a fixed arrangement and a plurality of damping members positioned within the tubes. The damping members include contoured interface regions characterized by bracing points that selectively contact the inner surface of an associated tube. Each interface region is sized and shaped in accordance with the associated tube, so that the damping member bracing points are spaced apart a vibration-reducing distance from the associated tube inner surfaces at equilibrium. During operation, mechanical interaction between the bracing points and the tube inner surfaces reduces vibration by a damage-reducing degree. In one embodiment, the interface regions are serpentine shaped. In another embodiment, the interface regions are helical in shape. The interface regions may be simultaneously helical and serpentine in shape. The damping members may be fixed within the associated tubes, and damping member may be customized several interference regions having attributes chosen in accordance with desired flow characteristics and associated tube properties.

  10. to appear at CRIS, Third International Conference on Critical Infrastructures, Alexandria, VA, September 2006 An approach to statistical estimation of cascading

    E-Print Network [OSTI]

    to estimates of the probability distribution of blackout size. This work opens up possibilities of monitoring infrastructure failures to quantify the vulnerability to cascading and the overall risk of large cascading data is significant. Since risk is prob- ability multiplied by cost, the blackout risk as a function

  11. Sociocultural definitions of risk

    SciTech Connect (OSTI)

    Rayner, S.

    1990-10-01

    Public constituencies frequently are criticized by technical experts as being irrational in response to low-probability risks. This presentation argued that most people are concerned with a variety of risk attributes other than probability and that is rather irrational to exclude these from the definition and analysis of technological risk. Risk communication, which is at the heart of the right-to-know concept, is described as the creation of shared meaning rather than the mere transmission of information. A case study of utilities, public utility commissions, and public interest groups illustrates how the diversity of institutional cultures in modern society leads to problems for the creation of shared meanings in establishing trust, distributing liability, and obtaining consent to risk. This holistic approach to risk analysis is most appropriate under conditions of high uncertainty and/or decision stakes. 1 fig., 5 tabs.

  12. ANCOLD Proceedings of Technical Groups A RISK-BASED RE-EVALUATION OF RESERVOIR OPERATING

    E-Print Network [OSTI]

    Bowles, David S.

    ANCOLD Proceedings of Technical Groups 1 A RISK-BASED RE-EVALUATION OF RESERVOIR OPERATING of the 2004 risk-based evaluation of operating restrictions for Lake Success, which incorporated new RESTRICTIONS TO REDUCE THE RISK OF FAILURE FROM EARTHQUAKE AND PIPING David S. Bowles1 Loren R. Anderson1

  13. FARGO-MOORHEAD METROPOLITAN AREA, ND AND MN FLOOD RISK MANAGEMENT PROJECT

    E-Print Network [OSTI]

    US Army Corps of Engineers

    FARGO-MOORHEAD METROPOLITAN AREA, ND AND MN FLOOD RISK MANAGEMENT PROJECT 23 September 2011, and technically feasible flood risk management for Fargo, North Dakota, Moorhead, Minnesota, and the surrounding area, and a storage area to reduce the existing and future flood risk and damages to public and private

  14. Reducing carbon dioxide to products

    DOE Patents [OSTI]

    Cole, Emily Barton; Sivasankar, Narayanappa; Parajuli, Rishi; Keets, Kate A

    2014-09-30

    A method reducing carbon dioxide to one or more products may include steps (A) to (C). Step (A) may bubble said carbon dioxide into a solution of an electrolyte and a catalyst in a divided electrochemical cell. The divided electrochemical cell may include an anode in a first cell compartment and a cathode in a second cell compartment. The cathode may reduce said carbon dioxide into said products. Step (B) may adjust one or more of (a) a cathode material, (b) a surface morphology of said cathode, (c) said electrolyte, (d) a manner in which said carbon dioxide is bubbled, (e), a pH level of said solution, and (f) an electrical potential of said divided electrochemical cell, to vary at least one of (i) which of said products is produced and (ii) a faradaic yield of said products. Step (C) may separate said products from said solution.

  15. Ferroelectric capacitor with reduced imprint

    DOE Patents [OSTI]

    Evans, Jr., Joseph T. (13609 Verbena Pl., NE., Albuquerque, NM 87112); Warren, William L. (7716 Wm. Moyers Ave., NE., Albuquerque, NM 87122); Tuttle, Bruce A. (12808 Lillian Pl., NE., Albuquerque, NM 87122); Dimos, Duane B. (6105 Innsbrook Ct., NE., Albuquerque, NM 87111); Pike, Gordon E. (1609 Cedar Ridge, NE., Albuquerque, NM 87112)

    1997-01-01

    An improved ferroelectric capacitor exhibiting reduced imprint effects in comparison to prior art capacitors. A capacitor according to the present invention includes top and bottom electrodes and a ferroelectric layer sandwiched between the top and bottom electrodes, the ferroelectric layer comprising a perovskite structure of the chemical composition ABO.sub.3 wherein the B-site comprises first and second elements and a dopant element that has an oxidation state greater than +4. The concentration of the dopant is sufficient to reduce shifts in the coercive voltage of the capacitor with time. In the preferred embodiment of the present invention, the ferroelectric element comprises Pb in the A-site, and the first and second elements are Zr and Ti, respectively. The preferred dopant is chosen from the group consisting of Niobium, Tantalum, and Tungsten. In the preferred embodiment of the present invention, the dopant occupies between 1 and 8% of the B-sites.

  16. MapReduce SVM Game

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

    Vineyard, Craig M.; Verzi, Stephen J.; James, Conrad D.; Aimone, James B.; Heileman, Gregory L.

    2015-08-10

    Despite technological advances making computing devices faster, smaller, and more prevalent in today's age, data generation and collection has outpaced data processing capabilities. Simply having more compute platforms does not provide a means of addressing challenging problems in the big data era. Rather, alternative processing approaches are needed and the application of machine learning to big data is hugely important. The MapReduce programming paradigm is an alternative to conventional supercomputing approaches, and requires less stringent data passing constrained problem decompositions. Rather, MapReduce relies upon defining a means of partitioning the desired problem so that subsets may be computed independently andmore »recom- bined to yield the net desired result. However, not all machine learning algorithms are amenable to such an approach. Game-theoretic algorithms are often innately distributed, consisting of local interactions between players without requiring a central authority and are iterative by nature rather than requiring extensive retraining. Effectively, a game-theoretic approach to machine learning is well suited for the MapReduce paradigm and provides a novel, alternative new perspective to addressing the big data problem. In this paper we present a variant of our Support Vector Machine (SVM) Game classifier which may be used in a distributed manner, and show an illustrative example of applying this algorithm.« less

  17. Page 1 of 2 Risk Management March 2012 Risk Management

    E-Print Network [OSTI]

    Page 1 of 2 Risk Management March 2012 Risk Management Supervisor's Vehicle Incident Report (Complete all sections of this form and return within 24 hours of incident to the Office of Risk Management Risk Management March 2012 Risk Management Unsafe Conditions or Actions (describe all contributing

  18. OPERATIONAL RISK RODNEY COLEMAN

    E-Print Network [OSTI]

    Coleman, Rodney

    the business environment. These include terrorism, civil unrest, systems fail- ings including hacking RISKS ARISING FROM BUSINESS ACTIVITY You lose business opportunities while your computer systems a business beyond those from its money-making activities. This is operational risk, often shortened to oprisk

  19. RISK ASSESSMENT CLOUD COMPUTING

    E-Print Network [OSTI]

    Columbia University

    SECURITY RESEARCH PRIVACY RISK ASSESSMENT AMC DATA FISMA CLOUD COMPUTING MOBILE DEVICES OPERATIONS PRACTICES TRENDS AUDITS policies #12;2 Privacy & Information Security Annual Update Thursday, June 20, 2013 of Breach statistics Plan to comply with requirements · Training and Education Information Security · Risk

  20. Recognizing liability risks

    SciTech Connect (OSTI)

    Price, C.; Zimmer, M.J.; Karas, J.L. (Reid Priest, Washington, DC (United States))

    1993-09-01

    Project developers, owners, investors, and lenders face potential liability for environmental contamination and cleanup. Being aware of the risks is the first step in mitigating future concerns. Independent power participants are wise to be concerned with a range of risks arising from off- or on-site contamination, civil and criminal violations of rules and regulations, and future compliance costs.

  1. Reference manual for toxicity and exposure assessment and risk characterization. CERCLA Baseline Risk Assessment

    SciTech Connect (OSTI)

    1995-03-01

    The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA, 1980) (CERCLA or Superfund) was enacted to provide a program for identifying and responding to releases of hazardous substances into the environment. The Superfund Amendments and Reauthorization Act (SARA, 1986) was enacted to strengthen CERCLA by requiring that site clean-ups be permanent, and that they use treatments that significantly reduce the volume, toxicity, or mobility of hazardous pollutants. The National Oil and Hazardous Substances Pollution Contingency Plan (NCP) (USEPA, 1985; USEPA, 1990) implements the CERCLA statute, presenting a process for (1) identifying and prioritizing sites requiring remediation and (2) assessing the extent of remedial action required at each site. The process includes performing two studies: a Remedial Investigation (RI) to evaluate the nature, extent, and expected consequences of site contamination, and a Feasibility Study (FS) to select an appropriate remedial alternative adequate to reduce such risks to acceptable levels. An integral part of the RI is the evaluation of human health risks posed by hazardous substance releases. This risk evaluation serves a number of purposes within the overall context of the RI/FS process, the most essential of which is to provide an understanding of ``baseline`` risks posed by a given site. Baseline risks are those risks that would exist if no remediation or institutional controls are applied at a site. This document was written to (1) guide risk assessors through the process of interpreting EPA BRA policy and (2) help risk assessors to discuss EPA policy with regulators, decision makers, and stakeholders as it relates to conditions at a particular DOE site.

  2. Reducing Your Electricity Use | Department of Energy

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

    Reducing Your Electricity Use Reducing Your Electricity Use July 15, 2012 - 4:11pm Addthis An energy audit can help you find the most effective ways to save money and reduce energy...

  3. Easing the natural gas crisis: Reducing natural gas prices through increased deployment of renewable energy and energy efficiency

    E-Print Network [OSTI]

    Wiser, Ryan; Bolinger, Mark; St. Clair, Matt

    2004-01-01

    Risk: Using Forward Natural Gas Prices Instead of Gas PriceGas Crisis: Reducing Natural Gas Prices through IncreasedSummary Heightened natural gas prices have emerged as a key

  4. Reducing Emissions Through Sustainable Transport: Proposal for...

    Open Energy Info (EERE)

    Reducing Emissions Through Sustainable Transport: Proposal for a Sectoral Approach Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Reducing Emissions Through Sustainable...

  5. New York: Weatherizing Westbeth Reduces Energy Consumption |...

    Office of Environmental Management (EM)

    York: Weatherizing Westbeth Reduces Energy Consumption New York: Weatherizing Westbeth Reduces Energy Consumption August 21, 2013 - 12:00am Addthis The New York State Homes and...

  6. Model Risk in Finance Department of Statistics

    E-Print Network [OSTI]

    Stine, Robert A.

    worth taking Statistical issues Multiplicity Transformations to obtain "independence" Orthogonality Year Valueof$100Investment Case-Shiller Housing Total Stock Market 3 #12;Wharton default Correlation risk Regulatory risk Reputation risk Operational risk Systemic risk, market risk

  7. Development of Improved Caprock Integrity and Risk Assessment Techniques

    SciTech Connect (OSTI)

    Bruno, Michael

    2014-09-30

    GeoMechanics Technologies has completed a geomechanical caprock integrity analysis and risk assessment study funded through the US Department of Energy. The project included: a detailed review of historical caprock integrity problems experienced in the natural gas storage industry; a theoretical description and documentation of caprock integrity issues; advanced coupled transport flow modelling and geomechanical simulation of three large-scale potential geologic sequestration sites to estimate geomechanical effects from CO? injection; development of a quantitative risk and decision analysis tool to assess caprock integrity risks; and, ultimately the development of recommendations and guidelines for caprock characterization and CO? injection operating practices. Historical data from gas storage operations and CO? sequestration projects suggest that leakage and containment incident risks are on the order of 10-1 to 10-2, which is higher risk than some previous studies have suggested for CO?. Geomechanical analysis, as described herein, can be applied to quantify risks and to provide operating guidelines to reduce risks. The risk assessment tool developed for this project has been applied to five areas: The Wilmington Graben offshore Southern California, Kevin Dome in Montana, the Louden Field in Illinois, the Sleipner CO? sequestration operation in the North Sea, and the In Salah CO? sequestration operation in North Africa. Of these five, the Wilmington Graben area represents the highest relative risk while the Kevin Dome area represents the lowest relative risk.

  8. Systemic risk in consumer finance

    E-Print Network [OSTI]

    Poon, Martha

    2011-01-01

    Systemic risk in consumer finance Uncertain about risk HowComplexity, Ecology, Finance The Pre-History of ResilienceSystemic risk in consumer finance Martha Poon, NYU At the

  9. Risk in the Weapons Stockpile

    SciTech Connect (OSTI)

    Noone, Bailey C

    2012-08-14

    When it comes to the nuclear weapons stockpile, risk must be as low as possible. Design and care to keep the stockpile healthy involves all aspects of risk management. Design diversity is a method that helps to mitigate risk.

  10. Reduced vibration motor winding arrangement

    DOE Patents [OSTI]

    Slavik, C.J.; Rhudy, R.G.; Bushman, R.E.

    1997-11-11

    An individual phase winding arrangement having a sixty electrical degree phase belt width for use with a three phase motor armature includes a delta connected phase winding portion and a wye connected phase winding portion. Both the delta and wye connected phase winding portions have a thirty electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of individual coils each formed, in turn, from an unequal number of electrical conductor turns in the approximate ratio of {radical}3. The individual coils of the delta and wye connected phase winding portions may either be connected in series or parallel. This arrangement provides an armature winding for a three phase motor which retains the benefits of the widely known and utilized thirty degree phase belt concept, including improved mmf waveform and fundamental distribution factor, with consequent reduced vibrations and improved efficiency. 4 figs.

  11. Reduced vibration motor winding arrangement

    DOE Patents [OSTI]

    Slavik, Charles J. (Rexford, NY); Rhudy, Ralph G. (Scotia, NY); Bushman, Ralph E. (Lathem, NY)

    1997-01-01

    An individual phase winding arrangement having a sixty electrical degree phase belt width for use with a three phase motor armature includes a delta connected phase winding portion and a wye connected phase winding portion. Both the delta and wye connected phase winding portions have a thirty electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of individual coils each formed, in turn, from an unequal number of electrical conductor turns in the approximate ratio of .sqroot.3. The individual coils of the delta and wye connected phase winding portions may either be connected in series or parallel. This arrangement provides an armature winding for a three phase motor which retains the benefits of the widely known and utilized thirty degree phase belt concept, including improved mmf waveform and fundamental distribution factor, with consequent reduced vibrations and improved efficiency.

  12. Risk Management in Biopharmaceutical Supply Chains

    E-Print Network [OSTI]

    Ma, Yao

    2011-01-01

    Supply Chain Risk Managementof Recent Work on Supply Chain Risk Management . . . . .M. , Supply chain risk management: Outlining an agenda for

  13. Climate Rules--Could Create Jobs and Reduce Costs for Texans 

    E-Print Network [OSTI]

    Smith, T.

    2014-01-01

    can be a big winner if we reduce CO2 ? Reduces carbon and weather risks ? Reduces pollution ? Reduces heath care, utility and insurance costs ?Create 100’s of thousands of jobs ? Export excess renewables and natural gas to others Public Citizen... System If we do this right it will create jobs and save money EPA’s goal of 40% reduction or 108 MMT 1 Doubling the use of renewables to 20% of energy by 2030 ( currently @11% in Texas ) 34 MMT 2 Increased energy efficiency to 1.5% per year or 10...

  14. Risk Estimation Methodology for Launch Accidents.

    SciTech Connect (OSTI)

    Clayton, Daniel James; Lipinski, Ronald J.; Bechtel, Ryan D.

    2014-02-01

    As compact and light weight power sources with reliable, long lives, Radioisotope Power Systems (RPSs) have made space missions to explore the solar system possible. Due to the hazardous material that can be released during a launch accident, the potential health risk of an accident must be quantified, so that appropriate launch approval decisions can be made. One part of the risk estimation involves modeling the response of the RPS to potential accident environments. Due to the complexity of modeling the full RPS response deterministically on dynamic variables, the evaluation is performed in a stochastic manner with a Monte Carlo simulation. The potential consequences can be determined by modeling the transport of the hazardous material in the environment and in human biological pathways. The consequence analysis results are summed and weighted by appropriate likelihood values to give a collection of probabilistic results for the estimation of the potential health risk. This information is used to guide RPS designs, spacecraft designs, mission architecture, or launch procedures to potentially reduce the risk, as well as to inform decision makers of the potential health risks resulting from the use of RPSs for space missions.

  15. Risk Management Process Overview | Department of Energy

    Energy Savers [EERE]

    Risk Management Process Overview Risk Management Process Overview figure depicting three tier risk management process The cybersecurity risk management process explained in the...

  16. Global Asteroid Risk Analysis

    E-Print Network [OSTI]

    Rumpf, Clemens

    2014-01-01

    Potentially impacting asteroids were analysed for their impact risk on the Earth. To this end, the Asteroid Risk Mitigation Optimization and Research (ARMOR) tool is currently being developed. The tool's modules are described and their validation is documented. Based on the asteroid ephemeris, the tool calculates the impact location probability distribution on the surface of the Earth (in the literature, occasionally referred to as risk corridor). NASA's Near Earth Object (NEO) risk list served as the source for asteroid ephemerides. The Line of Variation (LOV) method was employed to find virtual impactors. While offering a simple and fast way of identifying virtual impactors, the method provides a low impactor identification rate. This is because the search space is tightly constricted to the LOV and thus excludes virtual impactors located elsewhere in the asteroid position uncertainty region. The method's performance was evaluated and suggestions for improvements are provided. Application of the tool showed...

  17. Risk Management Guide

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

    2011-01-18

    This Guide provides non-mandatory risk management approaches for implementing the requirements of DOE O 413.3B, Program and Project Management for the Acquisition of Capital Assets. Supersedes DOE G 413.3-7.

  18. Livestock Risk Protection 

    E-Print Network [OSTI]

    Thompson, Bill; Bennett, Blake; Jones, Diana

    2008-10-21

    Livestock risk protection (LRP) insurance policies protect producers from adverse price changes in the livestock market. This publication explains how LRP works, discusses the advantages and disadvantages of these polices, and gives examples...

  19. Assessment of the risk of transporting liquid chlorine by rail

    SciTech Connect (OSTI)

    Andrews, W.B.

    1980-03-01

    This report presents the risk of shipping liquid chlorine by rail. While chlorine is not an energy material, there are several benefits to studying chlorine transportation risks. First, chlorine, like energy materials, is widely used as a feedstock to industry. Second, it is the major purification agent in municipal water treatment systems and therefore, provides direct benefits to the public. Finally, other risk assessments have been completed for liquid chlorine shipments in the US and Europe, which provide a basis for comparison with this study. None of the previous PNL energy material risk assessments have had other studies for comparison. For these reasons, it was felt that a risk assessment of chlorine transportation by rail could provide information on chlorine risk levels, identify ways to reduce these risks and use previous studies on chlorine risks to assess the strengths and weaknesses of the PNL risk assessment methodology. The risk assessment methodology used in this study is summarized. The methodology is presented in the form of a risk assessment model which is constructed for ease of periodic updating of the data base so that the risk may be reevaluated as additional data become available. The report is sectioned to correspond to specific analysis steps identified in the model. The transport system and accident environment are described. The response of the transport system to accident environments is described. Release sequences are postulated and evaluated to determine both the likelihood and possible consequences of a release. Supportive data and analyses are given in the appendices. The risk assessment results are related to the year 1985 to allow a direct comparison with other reports in this series.

  20. Biogeochemical Mechanisms Controlling Reduced Radionuclide Particle Properties and Stability

    SciTech Connect (OSTI)

    Jim K. Fredrickson; John M. Zachara; Matthew J. Marshall; Alex S. Beliaev

    2006-06-01

    Uranium and Technetium are the major risk-driving contaminants at Hanford and other DOE sites. These radionuclides have been shown to be reduced by dissimilatory metal reducing bacteria (DMRB) under anoxic conditions. Laboratory studies have demonstrated that reduction results in the formation of poorly soluble hydrous oxides, UO2(s) and TcO2n?H2O(s), that are believed to limit mobility in the environment. The mechanisms of microbial reduction of U and Tc have been the focus of considerable research in the Environmental Remediation Sciences Program (ERSP). In spite of equal or greater importance in terms of controlling the environmental fate of the contaminants relatively little is known regarding the precipitation mechanism(s), reactivity, persistence, and transport of biogenic UO2(s) and TcO2(s).

  1. Reduced models for quantum gravity

    E-Print Network [OSTI]

    T. Thiemann

    1999-10-04

    The preceding talks given at this conference have dealt mainly with general ideas for, main problems of and techniques for the task of quantizing gravity canonically. Since one of the major motivations to arrange for this meeting was that it should serve as a beginner's introduction to canonical quantum gravity, we regard it as important to demonstrate the usefulness of the formalism by means of applying it to simplified models of quantum gravity, here formulated in terms of Ashtekar's new variables. From the various, completely solvable, models that have been discussed in the literature we choose those that we consider as most suitable for our pedagogical reasons, namely 2+1 gravity and the spherically symmetric model. The former model arises from a dimensional, the latter from a Killing reduction of full 3+1 gravity. While 2+1 gravity is usually treated in terms of closed topologies without boundary of the initial data hypersurface, the toplogy for the spherically symmetric system is chosen to be asymptotically flat. Finally, 2+1 gravity is more suitably quantized using the loop representation while spherically symmetric gravity is easier to quantize via the self-dual representation. Accordingly, both types of reductions, both types of topologies and both types of representations that are mainly employed in the literature in the context of the new variables come into practice. What makes the discussion especially clear is the fact that for both models the reduced phase space turns out to be finitely dimensional.

  2. Risk Perceptions and Risk Management Strategies in French

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    EA 4272 Risk Perceptions and Risk Management Strategies in French Oyster Farming Véronique le Bihan Perceptions and Risk Management Strategies in French Oyster Farming Véronique Le Bihan, Sophie Pardo, Patrice and their businesses contribute to defining their degree of risk perception and reliance on management tools. Beyond

  3. THE FUNDAMENTAL RISK QUADRANGLE IN RISK MANAGEMENT, OPTIMIZATION

    E-Print Network [OSTI]

    Uryasev, Stanislav

    THE FUNDAMENTAL RISK QUADRANGLE IN RISK MANAGEMENT, OPTIMIZATION AND STATISTICAL ESTIMATION1 R be confronted in numerous situations. Dealing with them systematically for purposes in risk management Statistical estimation is inevitably a partner with risk management in handling hazards, which may be known

  4. Optimal risk allocation for convex risk functionals in general domains

    E-Print Network [OSTI]

    Rüschendorf, Ludger

    Optimal risk allocation for convex risk functionals in general domains Swen Kiesel and Ludger R of cash invariant, strictly convex risk functionals on Ed the uniqueness of Pareto optimal allocations up¨uschendorf University of Freiburg Abstract In this paper we extend the classical optimal risk allocation problem

  5. Risk Analysis and Decision Making FY 2013 Milestone Report

    SciTech Connect (OSTI)

    Engel, David W.; Dalton, Angela C.; Dale, Crystal; Jones, Edward; Thompson, J.

    2013-06-01

    Risk analysis and decision making is one of the critical objectives of CCSI, which seeks to use information from science-based models with quantified uncertainty to inform decision makers who are making large capital investments. The goal of this task is to develop tools and capabilities to facilitate the development of risk models tailored for carbon capture technologies, quantify the uncertainty of model predictions, and estimate the technical and financial risks associated with the system. This effort aims to reduce costs by identifying smarter demonstrations, which could accelerate development and deployment of the technology by several years.

  6. Risk Management Policy and Procedures

    E-Print Network [OSTI]

    Paxton, Anthony T.

    Risk Management Policy and Procedures #12;Risk Management Policy and Procedures Queen's University Belfast Updated January 2014 1. PURPOSE OF THIS DOCUMENT 1.1 This Risk Management Policy (the policy explains the University's underlying approach to risk management, documents the roles and responsibilities

  7. Model-Driven Risk Analysis

    E-Print Network [OSTI]

    Stølen, Ketil

    1 123 Model-Driven Risk Analysis The CORAS Approach | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | >springer.com ISBN 978-3-642-12322-1 Model-DrivenRiskAnalysis Mass Soldal Lund Bjørnar Solhaug Ketil Stølen Lund·Solhaug Stølen Lund · Solhaug · Stølen Model-Driven Risk Analysis The term"risk"is known from many

  8. CALIFORNIA STATE UNIVERSITY, RISK MANAGEMENT

    E-Print Network [OSTI]

    de Lijser, Peter

    CALIFORNIA STATE UNIVERSITY, FULLERTON RISK MANAGEMENT ANNUAL REPORT January 2008 OFFICE OF UNIVERSITY RISK MANAGEMENT CP-320 714-278-7346 #12;2006 ­ 2007 Risk Management Annual Report Page 2 I. Executive Summary A. Program Cost One method to assess the effectiveness of the University's risk management

  9. Eighth Annual Risk Management Conference

    E-Print Network [OSTI]

    Chaudhuri, Sanjay

    Eighth Annual Risk Management Conference Risk Management Amidst Global Rebalancing 10 ­ 11 July 2014, Singapore The Risk Management Institute (RMI) at the National University of Singapore invites submissions for its 8th annual conference on risk management in Singapore on 10 and 11 July 2014. We

  10. CALIFORNIA STATE UNIVERSITY, RISK MANAGEMENT

    E-Print Network [OSTI]

    de Lijser, Peter

    CALIFORNIA STATE UNIVERSITY, FULLERTON RISK MANAGEMENT ANNUAL REPORT November 2006 OFFICE OF UNIVERSITY RISK MANAGEMENT LH-806C 714-278-7346 #12;2005 ­ 2006 Risk Management Annual Report Page 2 I. Executive Summary A. Program Cost One method to assess the effectiveness of the University's risk management

  11. CALIFORNIA STATE UNIVERSITY, RISK MANAGEMENT

    E-Print Network [OSTI]

    de Lijser, Peter

    CALIFORNIA STATE UNIVERSITY, FULLERTON RISK MANAGEMENT ANNUAL REPORT November 2005 OFFICE OF UNIVERSITY RISK MANAGEMENT LH-806C 714-278-7346 #12;2004 ­ 2005 Risk Management Annual Report Page 2 I. Introduction The Office of University Risk Management provides resources, advice and training that allow

  12. Information Security Office Risk Management

    E-Print Network [OSTI]

    Alpay, S. Pamir

    Information Security Office Risk Management Exception Template #12;Risk Management Exception or Approved) 6/01/2013 CISO Jason Pufahl, CISO Approved 6/01/2013 RMAC Risk Management Advisory Council Reviewed #12;Risk Management Exception Template 2 | P a g e Please check one of the following: Requester

  13. ITER risk workshop facilitator guide

    SciTech Connect (OSTI)

    Medina, Patricia [Los Alamos National Laboratory

    2009-01-01

    The goal of planning risk management is to make everyone involved in a program aware that risk should be a consideration in the design, development, and fielding of a system. Risk planning is a tool to assess and mitigate events that might adversely impact the program. Therefore, risk management increases the probability/likelihood of program success and can help to avoid program crisis management and improve problem solving by managing risk early in the acquisition cycle.

  14. Resources for global risk assessment: The International Toxicity Estimates for Risk (ITER) and Risk Information Exchange (RiskIE) databases

    SciTech Connect (OSTI)

    Wullenweber, Andrea Kroner, Oliver; Kohrman, Melissa; Maier, Andrew; Dourson, Michael; Rak, Andrew; Wexler, Philip; Tomljanovic, Chuck

    2008-11-15

    The rate of chemical synthesis and use has outpaced the development of risk values and the resolution of risk assessment methodology questions. In addition, available risk values derived by different organizations may vary due to scientific judgments, mission of the organization, or use of more recently published data. Further, each organization derives values for a unique chemical list so it can be challenging to locate data on a given chemical. Two Internet resources are available to address these issues. First, the International Toxicity Estimates for Risk (ITER) database ( (www.tera.org/iter)) provides chronic human health risk assessment data from a variety of organizations worldwide in a side-by-side format, explains differences in risk values derived by different organizations, and links directly to each organization's website for more detailed information. It is also the only database that includes risk information from independent parties whose risk values have undergone independent peer review. Second, the Risk Information Exchange (RiskIE) is a database of in progress chemical risk assessment work, and includes non-chemical information related to human health risk assessment, such as training modules, white papers and risk documents. RiskIE is available at (http://www.allianceforrisk.org/RiskIE.htm), and will join ITER on National Library of Medicine's TOXNET ( (http://toxnet.nlm.nih.gov/)). Together, ITER and RiskIE provide risk assessors essential tools for easily identifying and comparing available risk data, for sharing in progress assessments, and for enhancing interaction among risk assessment groups to decrease duplication of effort and to harmonize risk assessment procedures across organizations.

  15. NGNP Risk Management Database: A Model for Managing Risk

    SciTech Connect (OSTI)

    John Collins; John M. Beck

    2011-11-01

    The Next Generation Nuclear Plant (NGNP) Risk Management System (RMS) is a database used to maintain the project risk register. The RMS also maps risk reduction activities to specific identified risks. Further functionality of the RMS includes mapping reactor suppliers Design Data Needs (DDNs) to risk reduction tasks and mapping Phenomena Identification Ranking Table (PIRTs) to associated risks. This document outlines the basic instructions on how to use the RMS. This document constitutes Revision 1 of the NGNP Risk Management Database: A Model for Managing Risk. It incorporates the latest enhancements to the RMS. The enhancements include six new custom views of risk data - Impact/Consequence, Tasks by Project Phase, Tasks by Status, Tasks by Project Phase/Status, Tasks by Impact/WBS, and Tasks by Phase/Impact/WBS.

  16. Health risks in perspective: Judging health risks of energy technologies

    SciTech Connect (OSTI)

    Rowe, M.D.

    1992-09-18

    Almost daily, Americans receive reports from the mass news media about some new and frightening risk to health and welfare. Most such reports emphasize the newsworthiness of the risks -- the possibility of a crisis, disagreements among experts, how things happened, who is responsible for fixing them, how much will it cost, conflict among parties involved, etc. As a rule, the magnitudes of the risks, or the difficulty of estimating those magnitudes, have limited newsworthiness, and so they are not mentioned. Because of this emphasis in the news media, most people outside the risk assessment community must judge the relative significance of the various risks to which we all are exposed with only that information deemed newsworthy by reporters. This information is biased and shows risks in isolation. There is no basis for understanding and comparing the relative importance of risks among themselves, or for comparing one risk, perhaps a new or newly-discovered one, in the field of all risks. The purpose of this report is to provide perspective on the various risks to which we are routinely exposed. It serves as a basis for understanding the meaning of quantitative risk estimates and for comparing new or newly-discovered risks with other, better-understood risks. Specific emphasis is placed on health risks of energy technologies.

  17. Reducing Greenhouse Emissions and Fuel Consumption

    E-Print Network [OSTI]

    Shaheen, Susan; Lipman, Timothy

    2007-01-01

    world experience, mobility management strategies appear to have the po­ tential to reduce energy and CO2 emissions

  18. Reducing Contingency through Sampling at the Luckey FUSRAP Site - 13186

    SciTech Connect (OSTI)

    Frothingham, David; Barker, Michelle; Buechi, Steve; Durham, Lisa

    2013-07-01

    Typically, the greatest risk in developing accurate cost estimates for the remediation of hazardous, toxic, and radioactive waste sites is the uncertainty in the estimated volume of contaminated media requiring remediation. Efforts to address this risk in the remediation cost estimate can result in large cost contingencies that are often considered unacceptable when budgeting for site cleanups. Such was the case for the Luckey Formerly Utilized Sites Remedial Action Program (FUSRAP) site near Luckey, Ohio, which had significant uncertainty surrounding the estimated volume of site soils contaminated with radium, uranium, thorium, beryllium, and lead. Funding provided by the American Recovery and Reinvestment Act (ARRA) allowed the U.S. Army Corps of Engineers (USACE) to conduct additional environmental sampling and analysis at the Luckey Site between November 2009 and April 2010, with the objective to further delineate the horizontal and vertical extent of contaminated soils in order to reduce the uncertainty in the soil volume estimate. Investigative work included radiological, geophysical, and topographic field surveys, subsurface borings, and soil sampling. Results from the investigative sampling were used in conjunction with Argonne National Laboratory's Bayesian Approaches for Adaptive Spatial Sampling (BAASS) software to update the contaminated soil volume estimate for the site. This updated volume estimate was then used to update the project cost-to-complete estimate using the USACE Cost and Schedule Risk Analysis process, which develops cost contingencies based on project risks. An investment of $1.1 M of ARRA funds for additional investigative work resulted in a reduction of 135,000 in-situ cubic meters (177,000 in-situ cubic yards) in the estimated base volume estimate. This refinement of the estimated soil volume resulted in a $64.3 M reduction in the estimated project cost-to-complete, through a reduction in the uncertainty in the contaminated soil volume estimate and the associated contingency costs. (authors)

  19. Risk Management Guide

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

    2008-09-16

    This Guide provides a framework for identifying and managing key technical, schedule, and cost risks through applying the requirements of DOE O 413.3A, Program and Project Management for the Acquisition of Capital Assets, dated 7-28-06. Canceled by DOE G 413.3-7A, dated 1-12-11. Does not cancel other directives.

  20. Structuring for technology risk

    SciTech Connect (OSTI)

    Klapper, M. (Canadian Imperial Bank of Commerce, New York, NY (United States))

    1993-10-01

    The Colver Power Project in Cambria County, PA, looked good in nearly all aspects, but lenders had concerns about startup problems encountered by earlier waste coal circulating fluidized bed projects. Nevertheless, a closer look at the operating history of the earlier plants showed possible risks could be handled.

  1. Effective risk management

    SciTech Connect (OSTI)

    Ball, C.J. [Corpfinance International Ltd., Toronto (Canada)

    1997-01-01

    Most independent power financial proposals contain one or more elements of a non-recourse nature. Traditionally, this means prospective lenders will not have a substantial corporate credit or state guarantee standing behind a project loan, which forces attention to be focused on a single asset as the security and debt repayment source. While this major risk remains present, if properly understood, uncertainty can be mitigated and managed, including financial and development hazards inherent in hydropower projects. The specific risk points that a project developer or sponsor must satisfy from the lender`s purposes are numerous. However, they can be grouped primarily into seven key risk areas: project profile, site securing, power sales agreements, government agreements, in-service management, construction and insurance. While a developer strives for a minimum internal rate of return of at least 20 percent, the lender`s expectations are much more modest. Often, developers need to place themselves in the proverbial shoes of the other entity, namely the independent lender, whose only attraction may be some interest, fee income and placement of capital in a safe investment which provides a return in an orderly and uninterrupted manner. Only then is it possible to objectively view and effectively manage the risks mentioned earlier.

  2. Risk transfer via energy savings insurance

    SciTech Connect (OSTI)

    Mills, Evan

    2001-10-01

    Among the key barriers to investment in energy efficiency improvements are uncertainties about attaining projected energy savings and apprehension about potential disputes over these savings. The fields of energy management and risk management are thus intertwined. While many technical methods have emerged to manage performance risks (e.g. building commissioning), financial risk transfer techniques are less developed in the energy management arena than in other more mature segments of the economy. Energy Savings Insurance (ESI) - formal insurance of predicted energy savings - is one method of transferring financial risks away from the facility owner or energy services contractor. ESI offers a number of significant advantages over other forms of financial risk transfer, e.g. savings guarantees or performance bonds. ESI providers manage risk via pre-construction design review as well as post-construction commissioning and measurement and verification of savings. We found that the two mos t common criticisms of ESI - excessive pricing and onerous exclusions - are not born out in practice. In fact, if properly applied, ESI can potentially reduce the net cost of energy savings projects by reducing the interest rates charged by lenders, and by increasing the level of savings through quality control. Debt service can also be ensured by matching loan payments to projected energy savings while designing the insurance mechanism so that payments are made by the insurer in the event of a savings shortfall. We estimate the U.S. ESI market potential of $875 million/year in premium income. From an energy-policy perspective, ESI offers a number of potential benefits: ESI transfers performance risk from the balance sheet of the entity implementing the energy savings project, thereby freeing up capital otherwise needed to ''self-insure'' the savings. ESI reduces barriers to market entry of smaller energy services firms who do not have sufficiently strong balance sheets to self-insure th e savings. ESI encourages those implementing energy saving projects to go beyond standard, tried-and-true measures and thereby achieve more significant levels of energy savings; and ESI providers stand to be proponents of improved savings measurement and verification techniques, as well as maintenance, thereby contributing to national energy savings objectives and perhaps elevating the quality of information available for program evaluation. Governmental agencies have been pioneers in the use of ESI and could continue to play a role in developing this innovative risk-transfer mechanism. There is particular potential for linkages between ESI and the ENERGY STAR (registered trademark) Buildings Program. It is likely that ENERGY STAR (registered trademark)-labeled commercial buildings (which have lower performance risk thanks to commissioning) would be attractive to providers of energy savings insurance. Conversely, the award of energy savings insurance to an ENERGY STAR (registered trade mark)-labeled building would raise the perceived credibility of the Label and energy savings attributed to the Program.

  3. THE RISK OF NUCLEAR TERRORISM AND NEXT STEPS TO REDUCE THE DANGER

    E-Print Network [OSTI]

    Laughlin, Robert B.

    nuclear facility in South Africa, where hundreds of kilograms of weapon-grade highly enriched uranium (HEU nuclear weapon and every cache of potential nuclear bomb material worldwide is secured against the kinds terrorism. Do terrorists want nuclear weapons? For a small set of terrorists, the answer is clearly "yes

  4. Evaluating the potential impact of vaginal microbicides to reduce the risk of acquiring HIV in

    E-Print Network [OSTI]

    Blower, Sally

    of at least one more this year in several African countries, including South Africa, Tanzania and Zambia [8 to condoms [2,3]. The hope is that microbicides can be added to lubricants for convenient use or combined

  5. National Residential Efficiency Measures Database Aimed at Reducing Risk for Residential Retrofit Industry

    SciTech Connect (OSTI)

    David Roberts

    2012-01-01

    This technical highlight describes NREL research to develop a publicly available database of energy retrofit measures containing performance characteristics and cost estimates for nearly 3,000 measures.

  6. USDA RAMP PROJECT -New York 2005 REDUCED-RISK PEST MANAGEMENT IN APPLES USING PHEROMONE DISRUPTION

    E-Print Network [OSTI]

    Agnello, Arthur M.

    , omitting petal fall leafroller materials in low-pressure blocks. #12;From April 28­May 5, Trécé Pherocon, nicotinoids, and oxadiazines. Because of uniformly low internal Lepidoptera pest populations in most sites: Apollo or dormant oil, plus Nexter or Zeal (as needed in summer) for mites, Actara and Esteem for early

  7. Avoid the Flu Healthy habits and simple actions will help reduce your risk of flu

    E-Print Network [OSTI]

    Ishida, Yuko

    illnesses. Wash your hands. Use soap and water often, especially after coughing or sneezing. Carry alcohol getting sick. Cover your cough. Use a tissue when coughing or sneezing. It can prevent the spread of germs. If you don't have a tissue, cough or sneeze into your arm above your hand. Don't contaminate. Try

  8. TEX-A-SYST: Reducing the Risk of Ground Water Contamination by Improving Petroleum Product Storage 

    E-Print Network [OSTI]

    Harris, Bill L.; Hoffman, D.; Mazac Jr., F. J.; Kantor, A. S.

    1997-08-29

    and cathodically protected. Monitoring Tanks Regulations for new underground tanks require that they have a method of detecting leaks. Select the tank location carefully to ensure that installation is easy and leak detec- tion methods reliable. Test the tank.../corrosion with cathodic corro- 15 years old, coated or more years old. or more years old. protection sion protection. with paint or asphalt. Bare steel tank less than 15 years old. Spill and tank over- Impermeable catch Impermeable catch Impermeable catch No protection...

  9. Reducing risk in basin scale sequestration: A Bayesian model selection framework for improving detection

    E-Print Network [OSTI]

    Seto, C.J.

    Geological CO[subscript 2] sequestration is a key technology for mitigating atmospheric greenhouse gas concentrations while providing low carbon energy. Deployment of sequestration at scales necessary for a material ...

  10. TEX-A-SYST: Reducing the Risk of Ground Water Contamination by Improving Household Wastewater Treatment 

    E-Print Network [OSTI]

    Harris, Bill L.; Hoffman, D.; Mazac Jr., F. J.

    1997-08-29

    Household wastewater treatment systems (septic systems) can contaminate ground water unless they are properly designed, constructed and maintained. This publication describes various kinds of systems and guides the homeowner in assessing...

  11. Over 35 years, integrated pest management has reduced pest risks and pesticide use

    E-Print Network [OSTI]

    Goodell, Peter B; Zalom, Frank G; Strand, Joyce F; Wilen, Cheryl A; Windbiel-Rojas, Karey

    2014-01-01

    activities on soil, water, air, plants and animals. Thisto protect surface water quality, air quality and wildlife,on hu- man health and air and water quality, UC IPM began

  12. TEX-A-SYST: Reducing the Risk of Ground Water Contamination by Improving Hazardous Waste Management 

    E-Print Network [OSTI]

    Harris, Bill L.; Hoffman, D.; Mazac Jr., F. J.; Kantor, A. S.

    1997-08-29

    possible. Hazardous wastes are defined as materials that are ignitable, toxic, corrosive or explosive (TWC, 1990). Lists of hazardous wastes are contained in 40 Code of Federal Regulations (CFR), Part 261.31 through 261.34. Some hazardous materials..., such as antifreeze, oil and grease H Used oil filters H Solvents for oil and grease removal and disposal H Engine, parts and equipment cleaners H Lubricants H Rust removers H Paints and paint preparation products H Brush or spray gun cleaners H Lead acid batteries...

  13. Innovative permeable cover system to reduce risks at a chemical munitions burial site

    SciTech Connect (OSTI)

    Powels, C.C.; Bon, I.; Okusu, N.M.

    1997-12-31

    An innovative permeable sand cover with various integrated systems has been designed to contain and treat the Old O-Field chemical munitions landfill at Aberdeen Proving Ground, Maryland. The 18,200 m{sup 2} (4.5 acre) landfill was used from the mid 1930s to the mid 1950s for the disposal of chemical, incendiary, and explosive munitions from domestic and foreign origins, together with contaminated wastes associated with the development and production of chemical warfare agents (CWA). The site is suspected to be contaminated with white phosphorous (WP) (which when dry, spontaneously burns when exposed to air), shock sensitive picric acid fuses and has the potential to contain large quantities of CWA-filled munitions. Historically, one to three explosions or fires occurred per ten-year period at the landfill. Such events have the potential to cause a CWA release to the environment, which could potentially affect densely populated areas. Recovery and decontamination projects conducted at the site in the late 1940s and early 1950s used large amounts of decontamination chemicals (containing solvents) and fuels which further contaminated the area. The groundwater downgradient of the landfill is contaminated with volatile organic compounds, metals, explosives and CWA degradation compounds and is currently being contained by a groundwater extraction and treatment system. This report describes a remedial action program for the site.

  14. Application of Chemically Accelerated Biotreatment to Reduce Risk in Oil-Impacted Soils

    SciTech Connect (OSTI)

    Paterek, J.R.; Bogan, W.W.; Lahner, L.M.; Trbovic, V.

    2003-03-06

    Conducted research in the following major focus areas: (1) Development of mild extraction approaches to estimate bioavailable fraction of crude oil residues in contaminated soils; (2) Application of these methods to understand decreases in toxicity and increases in sequestration of hydrocarbons over time, as well as the influence of soil properties on these processes; (3) Measurements of the abilities of various bacteria (PAH-degraders and others more representative of typical soil bacteria) to withstand oxidative treatments (i.e. Fenton's reaction) which would occur in CBT; and (4) Experiments into the biochemical/genetic inducibility of PAH degradation by compounds formed by the chemical oxidation of PAH.

  15. Over 35 years, integrated pest management has reduced pest risks and pesticide use

    E-Print Network [OSTI]

    Goodell, Peter B; Zalom, Frank G; Strand, Joyce F; Wilen, Cheryl A; Windbiel-Rojas, Karey

    2014-01-01

    LONG-TERM MANAGEMENT Over 35 years, integrated pestinvasive pests. Over its 35-year history, the UC Agriculture

  16. Conducting a 3D Converted Shear Wave Project to Reduce Exploration Risk at

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based Fuels|ProgramsLake Paiute Reservation |Department ofWELCOME

  17. Reduce Risk, Increase Clean Energy: How States and Cities are Using Old

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested PartiesBuildingBudgetFinancial Opportunities » Past

  18. Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties - WAPAEnergy6-09.doc Microsoft WordBlends Mid-LevelDomesticB Ofrom

  19. Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof EnergyApril 2014 |Department ofMay 2013EnergyIQAfrom Bio-Oil Upgrading

  20. DOE Selects Projects Aimed at Reducing Drilling Risks in Ultra-Deepwater |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electricLaboratory | Department of Energy WASHINGTON

  1. Technology maturity analysis for assessing capacity and schedule risk of future automation projects

    E-Print Network [OSTI]

    Frackleton, Conor J

    2014-01-01

    The need to improve risk assessment methods for automation projects within United States manufacturers exists due to a shift toward increased in factory automation stemming from industry pressure to reduce manufacturing ...

  2. Development of an incremental and iterative risk reduction facility for robotic servicing and assembly missions

    E-Print Network [OSTI]

    Sternberg, David Charles, S.M. Massachusetts Institute of Technology

    2014-01-01

    A means for reducing the risk for an on-orbit robotic servicing and assembly mission through the development of a series of testbeds that build successively upon one another is investigated. Robotic Servicing and Assembly ...

  3. Managing the risks of operating a hydro playground

    SciTech Connect (OSTI)

    Bachman, G.D.; Blackburn, P.C. (Van Ness, Feldman Curtis, Washington, DC (United States))

    1992-04-01

    An integral part of most hydro projects is some recreational opportunity for the public. As a result, plant owners need to be aware of and manage their exposure to recreational liability. This article discusses liability and the measures that hydro plant owners can take to reduce their risk.

  4. Buccal Spectral Markers for Lung Cancer Risk Stratification

    E-Print Network [OSTI]

    Hartline, Jason D.

    Buccal Spectral Markers for Lung Cancer Risk Stratification Andrew J. Radosevich1 *, Nikhil N, United States of America Abstract Lung cancer remains the leading cause of cancer deaths in the US with .150,000 deaths per year. In order to more effectively reduce lung cancer mortality, more sophisticated

  5. Risks and Risk Governance in Unconventional Shale Gas Development

    E-Print Network [OSTI]

    Jackson, Robert B.

    Risks and Risk Governance in Unconventional Shale Gas Development Mitchell J. Small,*, Paul C, Desert Research Institute, Reno, Nevada 89512, United States 1. INTRODUCTION The recent U.S. shale gas Issue: Understanding the Risks of Unconventional Shale Gas Development Published: July 1, 2014 A broad

  6. (Energy Risk Professional, ERP), (GARP),

    E-Print Network [OSTI]

    Kaplan, Alexander

    1 ( ) : . (Energy Risk Professional, ERP and Chris Strickland. Energy Derivatives: Pricing and Risk Management (London: Lacima Publications, 2000). Chapter 4: Energy Forward Curves ­ Steven Errera and Stewart L. Brown. Fundamentals

  7. Financial Innovation and Portfolio Risks

    E-Print Network [OSTI]

    Simsek, Alp

    I illustrate the effect of financial innovation on portfolio risks by using an example with risk-sharing needs and belief disagreements. I consider two types of innovation: product innovation, formalized as an expansion ...

  8. Risk-Based Strategies for Wind/Pumped-Hydro Coordination under Electricity Markets

    E-Print Network [OSTI]

    Boyer, Edmond

    be reduced by coupling the wind farm with energy storage facilities, thus constituting a virtual power plant1 Risk-Based Strategies for Wind/Pumped-Hydro Coordination under Electricity Markets Franck Bourry is able to minimize the imbalance penalty risks associated to wind power forecast uncertainty through

  9. Reducing Your Leak Rate Without Repairing Leaks 

    E-Print Network [OSTI]

    Beals, C.

    2005-01-01

    below the header pressure have the added advantage of reducing the air consumption of equipment, as well as reducing the leak rate. Turn Off the Air to Idle Equipment In most plants, when production equipment operators shut off their equipment... of the reason why plant personnel often find leak repair unproductive. The other reason relates to the compressor controls. If the plant had several lubricated rotary screw compressors operating in modulation, repairing 2,000 cfm in leaks may only reduce...

  10. Quantitative Risk Management Rudiger Frey

    E-Print Network [OSTI]

    Frey, Rüdiger

    Lecture Quantitative Risk Management R¨udiger Frey Universit¨at Leipzig Wintersemester 2010 risk management C. Introduction to Portfolio Credit Derivatives c 2010 (Frey) 1 #12;A. Introduction of counterparties. Measuring and management of credit risk is of high importance for financial institutions

  11. "" EPAT# Risk Assessments Environmental Impact

    E-Print Network [OSTI]

    "" EPAT# Risk Assessments Appendixes Environmental Impact Statement NESHAPS for Radionuclides for Hazardous Air Pollutants Risk Assessments Environmental Impact Statement for NESHAPS Radionuclides VOLUME 2 for Hazardous Air Pollutants EPA 520.1'1.-89-006,-2 Risk Assessments Environmental Impact Statement for NESHAPS

  12. CALIFORNIA STATE UNIVERSITY, RISK MANAGEMENT

    E-Print Network [OSTI]

    de Lijser, Peter

    CALIFORNIA STATE UNIVERSITY, FULLERTON RISK MANAGEMENT AND ENVIRONMENTAL HEALTH & INSTRUCTIONAL SAFETY 2009 ANNUAL REPORTS #12;2009 Annual Report Page 2 RISK MANAGEMENT I. Program Cost One method to assess the effectiveness of the University's risk management program is to compare the annual cost

  13. CALIFORNIA STATE UNIVERSITY, RISK MANAGEMENT

    E-Print Network [OSTI]

    de Lijser, Peter

    CALIFORNIA STATE UNIVERSITY, FULLERTON RISK MANAGEMENT 2003-04 ANNUAL REPORT OFFICE OF UNIVERSITY RISK MANAGEMENT #12;2 I. Introduction "Of course you have to go out on a limb sometimes, that's where the best outcome in a changing environment, is the essence of risk management.3 This Report was developed

  14. Human Resources, Safety & Risk Management

    E-Print Network [OSTI]

    1 Human Resources, Safety & Risk Management 1600 Holloway Avenue, ADM 252 San Francisco, California OF RISK AND AGREEMENT TO PAY CLAIMS Activity: San Francisco State University Campus Recreation Department participating in this Activity. I am aware of the risks associated with traveling to/from and participating

  15. CALIFORNIA STATE UNIVERSITY, RISK MANAGEMENT

    E-Print Network [OSTI]

    de Lijser, Peter

    CALIFORNIA STATE UNIVERSITY, FULLERTON RISK MANAGEMENT 2010 ANNUAL REPORT #12;2010 Annual Report Page 2 I. Program Cost One method to assess the effectiveness of the University's risk management,538 $ 197,196 TOTAL Risk Management Costs $ 4,675,390 $ 4,541,975 $ 3,764,749 $ 3,703,959 $ 4

  16. Risk perception in developing countries

    SciTech Connect (OSTI)

    Wilbanks, T.J.; Rayner, S.F.

    1985-02-15

    The paper briefly reviews: (1) what risk perception means to most people in developing countries; (2) some of the modern-technology-related risks to which people in these countries are exposed; and (3) some research evidence about risk perception that gives hints about how such perceptions will evolve in developing countries. (ACR)

  17. Regulatory cost-risk study

    SciTech Connect (OSTI)

    Not Available

    1983-04-01

    This study is intended to provide some quantitative perspective by selecting certain examples of criteria for which estimates of risks and costs can be obtained, and the balance of the various risks, (i.e., internal versus external risks), can be put into perspective. 35 refs., 39 tabs. (JDB)

  18. An optimizing reduced order FDS for the tropical Pacific Ocean reduced gravity model

    E-Print Network [OSTI]

    Aluffi, Paolo

    An optimizing reduced order FDS for the tropical Pacific Ocean reduced gravity model Zhendong Luoa) for the tropical Pacific Ocean reduced gravity model. Ensembles of data are compiled from transient solutions computed from the discrete equation system derived by FDS for the tropical Pacific Ocean reduced gravity

  19. Sandia Energy - Risk and Safety Assessment

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

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

  20. Reduce Air Infiltration in Furnaces; Industrial Technologies...

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

    5 * January 2006 Industrial Technologies Program Reduce Air Infiltration in Furnaces Fuel-fired furnaces discharge combustion products through a stack or a chimney. Hot furnace...

  1. Generalized Reduced Order Modeling of Aeroservoelastic Systems

    E-Print Network [OSTI]

    Gariffo, James Michael

    2013-01-01

    Aeroelasticity, Dover, 1996. [7] Dowell, E. , Crawley, E. ,Engineering, 2010. [13] Dowell, E. , “Some Recent AdvancesFL, 2010. [14] Attar, P. and Dowell, E. , “A Reduced Order

  2. Combustion with reduced carbon in the ash

    DOE Patents [OSTI]

    Kobayashi, Hisashi; Bool, III, Lawrence E.

    2005-12-27

    Combustion of coal in which oxygen is injected into the coal as it emerges from burner produces ash having reduced amounts of carbon.

  3. Reducing Logistics Footprints and Replenishment Demands: Nano...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Reducing Logistics Footprints and Replenishment Demands: Nano-engineered Silica Aerogels a Proven Method for Water Treatment Citation Details In-Document Search...

  4. NGNP Risk Management Database: A Model for Managing Risk

    SciTech Connect (OSTI)

    John Collins

    2009-09-01

    To facilitate the implementation of the Risk Management Plan, the Next Generation Nuclear Plant (NGNP) Project has developed and employed an analytical software tool called the NGNP Risk Management System (RMS). A relational database developed in Microsoft® Access, the RMS provides conventional database utility including data maintenance, archiving, configuration control, and query ability. Additionally, the tool’s design provides a number of unique capabilities specifically designed to facilitate the development and execution of activities outlined in the Risk Management Plan. Specifically, the RMS provides the capability to establish the risk baseline, document and analyze the risk reduction plan, track the current risk reduction status, organize risks by reference configuration system, subsystem, and component (SSC) and Area, and increase the level of NGNP decision making.

  5. Modelling risk and risking models: the diffusive boundary between science and policy in volcanic risk assessment

    E-Print Network [OSTI]

    Donovan, Amy R.; Oppenheimer, Clive

    2014-11-27

    This article examines the science-policy interface in volcanic risk assessment. It analyses empirical data from research on Montserrat, where new volcanic risk assessment methodologies were pioneered. We discuss the ways in which these methods...

  6. THE COST OF REDUCING VOC EMMISSIONS

    E-Print Network [OSTI]

    Bateman, Ian J.

    THE COST OF REDUCING VOC EMMISSIONS FROM 21 INDUSTRIES BY JONATHAN FISHER CSERGE WORKING PAPER WM 97-03 #12;THE COST OF REDUCING VOC EMISSIONS FROM 21 INDUSTRIES by Jonathan Fisher ERM Economics 8 and Industry to estimate the costs of various levels of controls on emissions of Volatile Organic Compounds

  7. University of Washington ENTERPRISE RISK MANAGEMENT

    E-Print Network [OSTI]

    Kaminsky, Werner

    University of Washington ENTERPRISE RISK MANAGEMENT 2010 Annual Report #12;ERM 2010 Annual Report 2 December 2010 "Enterprise Risk Management" (ERM) - a process - to integrate risk into strategic UW Enterprise Risk Management Framework . . . . . . . . . 6 Illustration of ERM Components

  8. Hazard/Risk Assessment A REFINED AQUATIC ECOLOGICAL RISK ASSESSMENT FOR A PYRETHROID

    E-Print Network [OSTI]

    Peterson, Robert K. D.

    Hazard/Risk Assessment A REFINED AQUATIC ECOLOGICAL RISK ASSESSMENT FOR A PYRETHROID INSECTICIDE risk assessments, the authors performed a probabilistic aquatic ecological risk assessment. The present study is the first ecological risk assessment for pyrethroids to quantitatively integrate

  9. Photovoltaic Degradation Risk: Preprint

    SciTech Connect (OSTI)

    Jordan, D. C.; Kurtz, S. R.

    2012-04-01

    The ability to accurately predict power delivery over the course of time is of vital importance to the growth of the photovoltaic (PV) industry. Important cost drivers include the efficiency with which sunlight is converted into power, how this relationship changes over time, and the uncertainty in this prediction. An accurate quantification of power decline over time, also known as degradation rate, is essential to all stakeholders - utility companies, integrators, investors, and researchers alike. In this paper we use a statistical approach based on historical data to quantify degradation rates, discern trends and quantify risks related to measurement uncertainties, number of measurements and methodologies.

  10. Ecological Risk Assessments

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES Science Network Requirements ReportEESEcological Risk

  11. Comparative risk analysis for the Rocky Flats Plant Integrated Project Planning

    SciTech Connect (OSTI)

    Jones, M.E.; Shain, D.I.

    1994-12-31

    The Rocky Flats Plant is developing a comprehensive planning strategy that will support transition of the Rocky Flats Plant from a nuclear weapons production facility to site cleanup and final disposition. Final disposition of the Rocky Flats Plant materials and contaminants requires consideration of the interrelated nature of sitewide problems, such as material movement and disposition, facility and land use endstates, costs, relative risks to workers and the public, and waste disposition. Comparative Risk Analysis employs both incremental risk and cumulative risk evaluations to compare risk from postulated options or endstates. Comparative Risk Analysis is an analytical tool for the Rocky Flats Plant Integrated Project Planning which can assist a decision-maker in evaluating relative risks among proposed remedial options or future endstates. It addresses the cumulative risks imposed by the Rocky Flats Plant and provides risk information, both human health and ecological, to aid in reducing unnecessary resource and monetary expenditures. Currently, there is no approved methodology that aggregates various risk estimates. Along with academic and field expert review, the Comparative Risk Analysis methodology is being reviewed and refined. A Rocky Flats Plant Risk Assessment Focus Group was established. Stakeholder involvement in the development provides an opportunity to influence the information delivered to a decision-maker. This paper discusses development of the methodology.

  12. DOE Releases Electricity Subsector Cybersecurity Risk Management...

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

    Releases Electricity Subsector Cybersecurity Risk Management Process (RMP) Guideline DOE Releases Electricity Subsector Cybersecurity Risk Management Process (RMP) Guideline May...

  13. AMERIND Risk Annual Conference and Trade Fair

    Broader source: Energy.gov [DOE]

    Hosted by the AMERIND Risk, this three-day conference includes risk management training, workers' safety, human resources, and more.

  14. Risk Management Policy Category: Strategic Management

    E-Print Network [OSTI]

    1 Risk Management Policy Category: Strategic Management 1. PURPOSE To support the University will be encouraged to speak openly and honestly. (iii) Managers will monitor risk and will disclose risks identified's risk appetite. 2.3. Risk management standards 2.3.1 The University's risk management framework

  15. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Collision GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 Draft #12;T : GW - KM - DP & +VAR FV 3D Risk RISK ASSESSMENT (VTRA) 2010 12/23/2013 3 GW-VCU Draft #12;12/23/2013 4 GW-VCU VESSEL TRAFFIC RISK

  16. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Grounding/23/2013 2 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 Draft #12;T : GW - KM - DP & +VAR FV 3D Risk-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 Draft #12;12/23/2013 4 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT

  17. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Collision TRAFFIC RISK ASSESSMENT (VTRA) 2010 Draft #12;T : GW - KM - DP & High Tan + CFV 3D Risk Profile All FV-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 Draft #12;12/13/2013 4 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT

  18. 10 Years after the 2003 Northeast Blackout | Department of Energy

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

    years ago today, large portions of the Midwest and Northeast United States and into Canada went dark. The cascading event, which started shortly after 4:00 PM on August 14,...

  19. Blackout 2003: Conference for public review draft report on implementa...

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

    22, in Washington, D.C., the U.S.-Canada Power System Outage Task Force will hold a conference for stakeholders and the public to comment on the draft of the final report of the...

  20. Blackout 2003: Electric System Working Group Technical Conference...

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

    December 16, 2003 Electric System Working Group Technical Conference, Philadelphia PA - Summary of comments and recommendations relating to the aftermath of the...

  1. Blackout!: mediated public deliberation and desegregation in Houston 

    E-Print Network [OSTI]

    Jacobs, Carrie A

    2013-02-22

    Mediated public deliberation involves professional communicators communicating with the public to ensure that the public's policy preferences are informed, enlightened, and authentic. In a basic sense, good information can ...

  2. Second Anniversary of Northeast Blackout Marked with Progress...

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

    standards to clarify what constitutes compliance with them; A commitment by NERC and the industry to develop reliability standards on new subjects, such as management of tree...

  3. Second Anniversary of Northeast Blackout Marked with Progress | Department

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing Tool FitsProjectData DashboardSolar » Search resultsWaterSearchDepartment ofof

  4. Blackout 2003: Energy Secretary Bodman and Minister of Natural Resources

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De pEnergy Industrial Local GovernmentDepartment of

  5. 10 Years after the 2003 Northeast Blackout | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p u t y A s s i s t a n t S eOF 1121Dave Schmitz |Patricia A.

  6. Blackout 2003: Conference for public review draft report on implementation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBio Centers Announcementand TheBiota Biotaof the task

  7. Blackout 2003: Electric System Working Group Technical Conference -

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBio Centers Announcementand TheBiota Biotaof the

  8. Blackout 2003: Transcript of Technical Conference with the Electric System

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, IncBio Centers Announcementand TheBiota Biotaofin the

  9. Are You Prepared for a Blackout? | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12Power, Inc | Department ofMarketing, LLCor Export5,ArcherPrepared

  10. Needs for Risk Informing Environmental Cleanup Decision Making - 13613

    SciTech Connect (OSTI)

    Zhu, Ming; Moorer, Richard

    2013-07-01

    This paper discusses the needs for risk informing decision making by the U.S. Department of Energy (DOE) Office of Environmental Management (EM). The mission of the DOE EM is to complete the safe cleanup of the environmental legacy brought about from the nation's five decades of nuclear weapons development and production and nuclear energy research. This work represents some of the most technically challenging and complex cleanup efforts in the world and is projected to require the investment of billions of dollars and several decades to complete. Quantitative assessments of health and environmental risks play an important role in work prioritization and cleanup decisions of these challenging environmental cleanup and closure projects. The risk assessments often involve evaluation of performance of integrated engineered barriers and natural systems over a period of hundreds to thousands of years, when subject to complex geo-environmental transformation processes resulting from remediation and disposal actions. The requirement of resource investments for the cleanup efforts and the associated technical challenges have subjected the EM program to continuous scrutiny by oversight entities. Recent DOE reviews recommended application of a risk-informed approach throughout the EM complex for improved targeting of resources. The idea behind this recommendation is that by using risk-informed approaches to prioritize work scope, the available resources can be best utilized to reduce environmental and health risks across the EM complex, while maintaining the momentum of the overall EM cleanup program at a sustainable level. In response to these recommendations, EM is re-examining its work portfolio and key decision making with risk insights for the major sites. This paper summarizes the review findings and recommendations from the DOE internal reviews, discusses the needs for risk informing the EM portfolio and makes an attempt to identify topics for R and D in integrated risk assessment that could assist in the EM prioritization efforts. (authors)

  11. The reduced environmental liability of clean coal technologies

    SciTech Connect (OSTI)

    Leslie, A.C.D. [Energetics, Inc., Columbia, MD (United States); McMillen, M. [Energetics, Inc., Washington, DC (United States)

    1997-08-01

    In this paper the authors will discuss the waste stream minimization that future commercially operated clean coal technologies can effect. They will explore the ability of these now-beginning-to-mature technologies to reduce those aspects of the emission streams that have greatest potential for what the authors term as environmental liability. Environmental liability is manifested in a variety of forms. There are both current liabilities and future liabilities. In addition, uncertainties may reside in future anticipated regulatory compliance and the costs of such compliance. Exposure to liability translates into perceived risk which creates an air of uncertainty to the power industry and its lenders who provide the capital to build new power plants. In the context of electric power generation, newer, high efficiency power generation technologies developed in the course of the Clean Coal Technology Program of the US Department of Energy result in reduced waste stream emissions when compared against more aging conventional combustion technologies. This paper will discuss how the introduction of new clean coal technologies will help balance the conflict between adverse environmental impact and the global demand for increased energy. The authors will discuss how clean coal technologies will facilitate compliance with future air standards that may otherwise expose power producers to modification and cleanup costs, noncompliance penalties, or premature shut down.

  12. Risk Reduction with a Fuzzy Expert Exploration Tool

    SciTech Connect (OSTI)

    Weiss, William W.; Broadhead, Ron; Mundorf, William R.

    2003-03-06

    A state-of-the-art exploration ''expert'' tool, relying on a computerized database and computer maps generated by neural networks, was developed through the use of ''fuzzy'' logic, a relatively new mathematical treatment of imprecise or non-explicit parameters and values. Oil prospecting risk can be reduced with the use of a properly developed and validated ''Fuzzy Expert Exploration (FEE) Tool.'' This FEE Tool can be beneficial in many regions of the U.S. by enabling risk reduction in oil and gas prospecting as well as decreased prospecting and development costs.

  13. Information needs for risk assessment

    SciTech Connect (OSTI)

    DeRosa, C.T.; Choudhury, H.; Schoeny, R.S.

    1990-12-31

    Risk assessment can be thought of as a conceptual approach to bridge the gap between the available data and the ultimate goal of characterizing the risk or hazard associated with a particular environmental problem. To lend consistency to and to promote quality in the process, the US Environmental Protection Agency (EPA) published Guidelines for Risk Assessment of Carcinogenicity, Developmental Toxicity, Germ Cell Mutagenicity and Exposure Assessment, and Risk Assessment of Chemical Mixtures. The guidelines provide a framework for organizing the information, evaluating data, and for carrying out the risk assessment in a scientifically plausible manner. In the absence of sufficient scientific information or when abundant data are available, the guidelines provide alternative methodologies that can be employed in the risk assessment. 4 refs., 3 figs., 2 tabs.

  14. Reducing Safety Flaring through Advanced Control 

    E-Print Network [OSTI]

    Hokanson, D.; Lehman, K.; Matsumoto, S.; Takai, N.; Takase, F.

    2010-01-01

    An advanced process control application, using DMCplus® (Aspen Technology, Inc.), was developed to substantially reduce fuel gas losses to the flare at a large integrated refining / petrochemical complex. Fluctuations in internal fuel gas system...

  15. Working Together to Reduce Our Environmental Footprint

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

    Ground Floor, & DOE Cafeteria MONDAY APRIL 20 11:00 A.M. - 2:30 P.M. * Environmental Film Series * Forrestal Small Auditorium GJ-015 See two excellent films related to reducing...

  16. Reducing Emissions in Plant Flaring Operations 

    E-Print Network [OSTI]

    Duck, B.

    2011-01-01

    latest technologies and reducing green house gas emissions.1 The company also created a Green Team with the objective of achieving zero injury, zero pollution, and zero accidents for all production facilities. These Green Teams advocated the company's new...

  17. Process for reducing aqueous nitrate to ammonia

    DOE Patents [OSTI]

    Mattus, A.J.

    1993-11-30

    Powdered aluminum is added to a nitrate-containing alkaline, aqueous solution to reduce the nitrate and/or nitrite to ammonia and co-produce a sinterable ceramic product. 3 figures.

  18. On reduced relatives with genitive subjects

    E-Print Network [OSTI]

    Krause, Cornelia (Cornelia Ann), 1972-

    2001-01-01

    What is the place of relatives with genitive subjects in a typology of relative clauses? Are they full or reduced, headed or free relatives? Can they appear pre- and postnominally? Can they be head-internal relatives? Are ...

  19. Reducing Your Electricity Use | Department of Energy

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

    If you are planning to install a small renewable energy system to make your own electricity, such as a solar electric system or small wind turbine, reducing your electricity...

  20. “Friday off”: Reducing Working Hours in Europe

    E-Print Network [OSTI]

    Kallis, Giorgos

    This article explores the pros and cons for reducing working hours in Europe. To arrive to an informed judgment we review critically the theoretical and empirical literature, mostly from economics, concerning the relation ...

  1. Continuous Improvement Energy Projects Reduce Energy Consumption 

    E-Print Network [OSTI]

    Niemeyer, E.

    2014-01-01

    Projects Reduce Energy Consumption Eric Niemeyer, Operations Superintendent Drilling Specialties Company A division of Chevron Phillips Chemical Company LP ESL-IE-14-05-31 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New... of the paper “Continuous Improvement Energy Projects Reduce Energy Consumption” by Bruce Murray and Allison Myers ESL-IE-14-05-31 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 Conroe, TX Facility ESL...

  2. Reducing mode circulating fluid bed combustion

    DOE Patents [OSTI]

    Lin, Yung-Yi (Katy, TX); Sadhukhan, Pasupati (Katy, TX); Fraley, Lowell D. (Sugarland, TX); Hsiao, Keh-Hsien (Houston, TX)

    1986-01-01

    A method for combustion of sulfur-containing fuel in a circulating fluid bed combustion system wherein the fuel is burned in a primary combustion zone under reducing conditions and sulfur captured as alkaline sulfide. The reducing gas formed is oxidized to combustion gas which is then separated from solids containing alkaline sulfide. The separated solids are then oxidized and recycled to the primary combustion zone.

  3. Managing risk in software systems

    SciTech Connect (OSTI)

    Fletcher, S.K.; Jansma, R.M.; Murphy, M.D. [and others

    1995-07-01

    A methodology for risk management in the design of software systems is presented. It spans security, safety, and correct operation of software within the context of its environment, and produces a risk analysis and documented risk management strategy. It is designed to be iteratively applied, to attain appropriate levels of detail throughout the analysis. The methodology and supporting tools are discussed. The methodology is critiqued relative to other research in the field. Some sample applications of the methodology are presented.

  4. Reduced waste generation technical work plan

    SciTech Connect (OSTI)

    Not Available

    1987-05-01

    The United States Department of Energy has established policies for avoiding plutonium losses to the waste streams and minimizing the generation of wastes produced at its nuclear facilities. This policy is evidenced in DOE Order 5820.2, which states Technical and administrative controls shall be directed towards reducing the gross volume of TRU waste generated and the amount of radioactivity in such waste.'' To comply with the DOE directive, the Defense Transuranic Waste Program (DTWP) supports and provides funding for specific research and development tasks at the various DOE sites to reduce the generation of waste. This document has been prepared to give an overview of current and past Reduced Waste Generation task activities which are to be based on technical and cost/benefit factors. The document is updated annually, or as needed, to reflect the status of program direction. Reduced Waste Generation (RWG) tasks encompass a wide range of goals which are basically oriented toward (1) avoiding the generation of waste, (2) changing processes or operations to reduce waste, (3) converting TRU waste into LLW by sorting or decontamination, and (4) reducing volumes through operations such as incineration or compaction.

  5. Section 10: Risk Management Concepts

    E-Print Network [OSTI]

    2014-12-04

    Dec 2, 2014 ... In this lesson we will discuss some concepts from risk management and insurance. We will go over the basic definitions and discuss some ...

  6. R00475--FM Risk Mgmt

    Energy Savers [EERE]

    to project success. The risk identification process on a project is typically one of brain- storming, and the usual rules of brainstorming apply: * The full project team should...

  7. Spent Fuel Transportation Risk Assessment

    Office of Environmental Management (EM)

    Spent Fuel Transportation Risk Assessment (SFTRA) Draft NUREG-2125 Overview for National Transportation Stakeholders Forum John Cook Division of Spent Fuel Storage and...

  8. Reduced order models for prediction of groundwater quality impacts from CO? and brine leakage

    SciTech Connect (OSTI)

    Zheng, Liange; Carroll, Susan; Bianchi, Marco; Mansoor, Kayyum; Sun, Yunwei; Birkholzer, Jens

    2014-12-31

    A careful assessment of the risk associated with geologic CO? storage is critical to the deployment of large-scale storage projects. A potential risk is the deterioration of groundwater quality caused by the leakage of CO? and brine leakage from deep subsurface reservoirs. In probabilistic risk assessment studies, numerical modeling is the primary tool employed to assess risk. However, the application of traditional numerical models to fully evaluate the impact of CO? leakage on groundwater can be computationally complex, demanding large processing times and resources, and involving large uncertainties. As an alternative, reduced order models (ROMs) can be used as highly efficient surrogates for the complex process-based numerical models. In this study, we represent the complex hydrogeological and geochemical conditions in a heterogeneous aquifer and subsequent risk by developing and using two separate ROMs. The first ROM is derived from a model that accounts for the heterogeneous flow and transport conditions in the presence of complex leakage functions for CO? and brine. The second ROM is obtained from models that feature similar, but simplified flow and transport conditions, and allow for a more complex representation of all relevant geochemical reactions. To quantify possible impacts to groundwater aquifers, the basic risk metric is taken as the aquifer volume in which the water quality of the aquifer may be affected by an underlying CO? storage project. The integration of the two ROMs provides an estimate of the impacted aquifer volume taking into account uncertainties in flow, transport and chemical conditions. These two ROMs can be linked in a comprehensive system level model for quantitative risk assessment of the deep storage reservoir, wellbore leakage, and shallow aquifer impacts to assess the collective risk of CO? storage projects.

  9. Reduced order models for prediction of groundwater quality impacts from CO? and brine leakage

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

    Zheng, Liange; Carroll, Susan; Bianchi, Marco; Mansoor, Kayyum; Sun, Yunwei; Birkholzer, Jens

    2014-12-31

    A careful assessment of the risk associated with geologic CO? storage is critical to the deployment of large-scale storage projects. A potential risk is the deterioration of groundwater quality caused by the leakage of CO? and brine leakage from deep subsurface reservoirs. In probabilistic risk assessment studies, numerical modeling is the primary tool employed to assess risk. However, the application of traditional numerical models to fully evaluate the impact of CO? leakage on groundwater can be computationally complex, demanding large processing times and resources, and involving large uncertainties. As an alternative, reduced order models (ROMs) can be used as highlymore »efficient surrogates for the complex process-based numerical models. In this study, we represent the complex hydrogeological and geochemical conditions in a heterogeneous aquifer and subsequent risk by developing and using two separate ROMs. The first ROM is derived from a model that accounts for the heterogeneous flow and transport conditions in the presence of complex leakage functions for CO? and brine. The second ROM is obtained from models that feature similar, but simplified flow and transport conditions, and allow for a more complex representation of all relevant geochemical reactions. To quantify possible impacts to groundwater aquifers, the basic risk metric is taken as the aquifer volume in which the water quality of the aquifer may be affected by an underlying CO? storage project. The integration of the two ROMs provides an estimate of the impacted aquifer volume taking into account uncertainties in flow, transport and chemical conditions. These two ROMs can be linked in a comprehensive system level model for quantitative risk assessment of the deep storage reservoir, wellbore leakage, and shallow aquifer impacts to assess the collective risk of CO? storage projects.« less

  10. Environmental restoration risk-based prioritization work package planning and risk ranking methodology. Revision 2

    SciTech Connect (OSTI)

    Dail, J.L.; Nanstad, L.D.; White, R.K.

    1995-06-01

    This document presents the risk-based prioritization methodology developed to evaluate and rank Environmental Restoration (ER) work packages at the five US Department of Energy, Oak Ridge Field Office (DOE-ORO) sites [i.e., Oak Ridge K-25 Site (K-25), Portsmouth Gaseous Diffusion Plant (PORTS), Paducah Gaseous Diffusion Plant (PGDP), Oak Ridge National Laboratory (ORNL), and the Oak Ridge Y-12 Plant (Y-12)], the ER Off-site Program, and Central ER. This prioritization methodology was developed to support the increased rigor and formality of work planning in the overall conduct of operations within the DOE-ORO ER Program. Prioritization is conducted as an integral component of the fiscal ER funding cycle to establish program budget priorities. The purpose of the ER risk-based prioritization methodology is to provide ER management with the tools and processes needed to evaluate, compare, prioritize, and justify fiscal budget decisions for a diverse set of remedial action, decontamination and decommissioning, and waste management activities. The methodology provides the ER Program with a framework for (1) organizing information about identified DOE-ORO environmental problems, (2) generating qualitative assessments of the long- and short-term risks posed by DOE-ORO environmental problems, and (3) evaluating the benefits associated with candidate work packages designed to reduce those risks. Prioritization is conducted to rank ER work packages on the basis of the overall value (e.g., risk reduction, stakeholder confidence) each package provides to the ER Program. Application of the methodology yields individual work package ``scores`` and rankings that are used to develop fiscal budget requests. This document presents the technical basis for the decision support tools and process.

  11. Revisiting Modes of energy generation in sulfate reducing bacteria

    E-Print Network [OSTI]

    Joachimiak, Marcin

    2010-01-01

    generation in sulfate reducing bacteria 1. Lawrence BerkeleyAbstract Sulfate reducing bacteria (SRB) play an importantin the sulfate-reducing bacteria Desulfovibrio sp." FEMS

  12. Reduce Pumping Costs Through Optimum Pipe Sizing | Department...

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

    Reduce Pumping Costs Through Optimum Pipe Sizing Reduce Pumping Costs Through Optimum Pipe Sizing This tip sheet discusses how to reduce pumping system costs through optimum pipe...

  13. Reducing the Cost of Solar Cells

    SciTech Connect (OSTI)

    Scanlon, B.

    2012-04-01

    Solar-powered electricity prices could soon approach those of power from coal or natural gas thanks to collaborative research with solar startup Ampulse Corporation at the National Renewable Energy Laboratory. Silicon wafers account for almost half the cost of today's solar photovoltaic panels, so reducing or eliminating wafer costs is essential to bringing prices down. Current crystalline silicon technology converts energy in a highly efficient manner; however, that technology is manufactured with processes that could stand some improvement. The industry needs a method that is less complex, creates less waste and uses less energy. First, half the refined silicon is lost as dust in the wafer-sawing process, driving module costs higher. Wafers are sawn off of large cylindrical ingots, or boules, of silicon. A typical 2-meter boule loses as many as 6,000 potential wafers during sawing. Second, the wafers produced are much thicker than necessary. To efficiently convert sunlight into electricity, the wafers need be only one-tenth the typical thickness. NREL, the Oak Ridge National Laboratory and Ampulse have partnered on an approach to eliminate this waste and dramatically lower the cost of the finished solar panels. By using a chemical vapor deposition process to grow the silicon on inexpensive foil, Ampulse is able to make the solar cells just thick enough to convert most of the solar energy into electricity. No more sawdust - and no more wasting refined silicon materials. NREL developed the technology to grow high-quality silicon and ORNL developed the metal foil that has the correct crystal structure to support that growth. Ampulse is installing a pilot manufacturing line in NREL's Process Development Integration Laboratory, where solar companies can work closely with lab scientists on integrated equipment to answer pressing questions related to their technology development, as well as rapidly overcoming R and D challenges and risk. NREL's program is focused on transformative innovation in the domestic PV industry. With knowledge and expertise acquired from the PDIL pilot production line tools, Ampulse plans to design a full-scale production line to accommodate long rolls of metal foil. The Ampulse process 'goes straight from pure silicon-containing gas to high-quality crystal silicon film,' said Brent Nelson, the operational manager for the Process Development Integration Laboratory. 'The advantage is you can make the wafer just as thin as you need it - 10 microns or less.' Most of today's solar cells are made out of wafer crystalline silicon, though thin-film cells made of more exotic elements such as copper, indium, gallium, arsenic, cadmium, tellurium and others are making a strong push into the market. The advantage of silicon is its abundance, because it is derived from sand. Silicon's disadvantage is that purifying it into wafers suitable for solar cells can be expensive and energy intensive. Manufacturers add carbon and heat to sand to produce metallurgical-grade silicon, which is useful in other industries, but not yet suitable for making solar cells. So this metallurgical-grade silicon is then converted to pure trichlorosilane (SiCl3) or silane (SiH4) gas. Typically, the purified gas is then converted to create a silicon feedstock at 1,000 degrees Celsius. This feedstock is melted at 1,414 C and recrystallized into crystal ingots that are finally sawed into wafers. The Ampulse method differs in that it eliminates the last two steps in the traditional process and works directly with the silane gas growing only the needed silicon right onto a foil substrate. A team of NREL scientists had developed a way to use a process called hot-wire chemical vapor deposition to thicken silicon wafers with near perfect crystal structure. Using a hot tungsten filament much like the one found in an incandescent light bulb, the silane gas molecules are broken apart and deposited onto the wafer using the chemical vapor deposition technique at about 700 C - a much lower temperature than needed to make the wafer. The hot filament dec

  14. About the relevance ofthe concept of risk acceptability in the risk analysis and risk management process: A decisional

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    About the relevance ofthe concept of« risk acceptability » in the risk analysis and risk management analysis and risk management are taken. This can be introduced by: ft) giving an image ofwhat are involved and participate to the risk management process. In France, the Toulouse disaster has revealed

  15. Health_and_safety/Risk Assessment/2012/Workstation_Risk_Assessment_Form_Aug-2012 Workstation Risk Assessment Form

    E-Print Network [OSTI]

    Cambridge, University of

    Health_and_safety/Risk Assessment/2012/Workstation_Risk_Assessment_Form_Aug-2012 Workstation Risk No Is the noise level acceptable? Yes No Notes: #12;Health_and_safety/Risk Assessment/2012/Workstation_Risk_Assessment Assessment Form Workstation user: Location: Assessor: Date of assessment: COMPUTER Screen: Are the characters

  16. READ AND SIGN THE PARTIAL ASSUMPTION OF RISK ON REVERSE Risk Management 12/2012 Risk Management

    E-Print Network [OSTI]

    Cina, Jeff

    READ AND SIGN THE PARTIAL ASSUMPTION OF RISK ON REVERSE Risk Management 12/2012 Risk Management Conditions of Volunteer Service Please send completed form to the Office of Risk Management: riskmanagement ___________________________________________ (name/title of department supervisor) and the Office of Risk Management, (541) 346-8316, within 24 hours

  17. Therisk management-risk assessmentinterface

    E-Print Network [OSTI]

    Short, Daniel

    Therisk management- risk assessmentinterface Lastin afve-pan seies oncancernskassessmznt Paul.Evenso,Fuly sat- isfactorysolutioDsto the risk manage- menlDr.blemsof cancerafributableto industrialy relardE Dislc.,Jr. Hoqston,Tet:nO24 Everyonpracticesrisk management daily to rcduccrisksof nl3ny khds

  18. Climate risk Learning from practice

    E-Print Network [OSTI]

    Smerdon, Jason E.

    Climate risk management in Africa: Learning from practice ClimateandSocietyNo.1 #12;The Climate and Society series is devoted to providing authoritative and accessible information on climate risk management of the International Research Institute for Climate and Society (IRI). IRI aims to contribute to sustainable living

  19. Infrared photoemitting diode having reduced work function

    DOE Patents [OSTI]

    Hirschfeld, T.B.

    1982-05-06

    In electro-optical detectors which include as elements a photoemitting photocathode and anode, a photoemitting diode is fabricated which lowers the diode's work function, thus reducing the cooling requirement typically needed for this type of device. The work function is reduced by sandwiching between the photocathode and anode a liquid meidum of the formula NR/sub 3/ and having an electron affinity for the electrons of the photocathode, which liquid medium permits free electrons leaving the photocathode to remain as stable solvated species in the liquid medium. Thus, highly light-absorbent, and therefore thin, metallic layers can be used for detection, thereby reducing dark current at a given temperature, with a consequent reduction in cooling requirements at constant detector performance.

  20. Process for reducing beta activity in uranium

    DOE Patents [OSTI]

    Briggs, G.G.; Kato, T.R.; Schonegg, E.

    1985-04-11

    This invention is a method for lowering the beta radiation hazards associated with the casting of uranium. The method reduces the beta radiation emitted from the as-cast surfaces of uranium ingots. The method also reduces the amount of beta radiation emitters retained on the interiors of the crucibles that have been used to melt the uranium charges and which undergone cleaning in a remote handling facility. The lowering of the radioactivity is done by scavenging the beta emitters from the molten uranium with a molten mixture containing the fluorides of magnesium and calcium. The method provides a means of collection and disposal of the beta emitters in a manner that reduces radiation exposure to operating personnel in the work area where the ingots are cast and processed. 5 tabs.

  1. Process for reducing beta activity in uranium

    DOE Patents [OSTI]

    Briggs, Gifford G. (Cincinnatti, OH); Kato, Takeo R. (Cincinnatti, OH); Schonegg, Edward (Cleves, OH)

    1986-01-01

    This invention is a method for lowering the beta radiation hazards associated with the casting of uranium. The method reduces the beta radiation emitted from the as-cast surfaces of uranium ingots. The method also reduces the amount of beta radiation emitters retained on the interiors of the crucibles that have been used to melt the uranium charges and which have undergone cleaning in a remote handling facility. The lowering of the radioactivity is done by scavenging the beta emitters from the molten uranium with a molten mixture containing the fluorides of magnesium and calcium. The method provides a means of collection and disposal of the beta emitters in a manner that reduces radiation exposure to operating personnel in the work area where the ingots are cast and processed.

  2. 2007 Wholesale Power Rate Case Initial Proposal : Risk Analysis Study.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    2005-11-01

    The Federal Columbia River Power System (FCRPS), operated on behalf of the ratepayers of the PNW by BPA and other Federal agencies, faces many uncertainties during the FY 2007-2009 rate period. Among these uncertainties, the largest revolve around hydro conditions, market prices and river operations for fish recovery. In order to provide a high probability of making its U.S. Treasury payments, BPA performs a Risk Analysis as part of its rate-making process. In this Risk Analysis, BPA identifies key risks, models their relationships, and then analyzes their impacts on net revenues (total revenues less expenses). BPA subsequently evaluates in the ToolKit Model the Treasury Payment Probability (TPP) resulting from the rates, risks, and risk mitigation measures described here and in the Wholesale Power Rate Development Study (WPRDS). If the TPP falls short of BPA's standard, additional risk mitigation revenues, such as PNRR and CRAC revenues are incorporated in the modeling in ToolKit until the TPP standard is met. Increased wholesale market price volatility and six years of drought have significantly changed the profile of risk and uncertainty facing BPA and its stakeholders. These present new challenges for BPA in its effort to keep its power rates as low as possible while fully meeting its obligations to the U.S. Treasury. As a result, the risk BPA faces in not receiving the level of secondary revenues that have been credited to power rates before receiving those funds is greater. In addition to market price volatility, BPA also faces uncertainty around the financial impacts of operations for fish programs in FY 2006 and in the FY 2007-2009 rate period. A new Biological Opinion or possible court-ordered change to river operations in FY 2006 through FY 2009 may reduce BPA's net revenues included Initial Proposal. Finally, the FY 2007-2009 risk analysis includes new operational risks as well as a more comprehensive analysis of non-operating risks. Both the operational and non-operational risks will be described in Section 2.0 of this study. Given these risks, if rates are designed using BPA's traditional approach of only adding Planned Net Revenues for Risk (PNRR), power rates would need to recover a much larger ''risk premium'' to meet BPA's TPP standard. As an alternative to high fixed risk premiums, BPA is proposing a risk mitigation package that combines PNRR with a variable rate mechanism similar to the cost recovery adjustment mechanisms used in the FY 2002-2006 rate period. The proposed risk mitigation package is less expensive on a forecasted basis because the rates can be adjusted on an annual basis to respond to uncertain financial outcomes. BPA is also proposing a Dividend Distribution Clause (DDC) to refund reserves in excess of $800M to customers in the event net revenues in the next rate period exceed current financial forecasts.

  3. Effect of consuming ground beef of differing monounsaturated fatty acid content on atherosclerotic cardiovascular disease risk factors in healthy men 

    E-Print Network [OSTI]

    Cao, Xiaojuan

    2009-05-15

    Atherosclerotic cardiovascular disease (ASCVD) is currently the most common cause of death in the United States. Some dietary factors contribute importantly to ASCVD and other factors can reduce risk of ASCVD. Oleic acid ...

  4. RMI 357e spring 2013 Risk Management

    E-Print Network [OSTI]

    Ghosh, Joydeep

    RMI 357e ­ spring 2013 1 Risk Management R M 357e Professor: Christopher McClellan Office: CBA 3 thomaspjacob@utexas.edu Syllabus ­ spring 2013 Textbook Risk Management for Enterprises and Individuals, v.1://students.flatworldknowledge.com/course/1112649 Risk Management: 357E. Risk Management - Upper-Division Course Principles of risk management

  5. DYNAMIC RISK MANAGEMENT IN ELECTRICITY PORTFOLIO OPTIMIZATION

    E-Print Network [OSTI]

    Römisch, Werner

    DYNAMIC RISK MANAGEMENT IN ELECTRICITY PORTFOLIO OPTIMIZATION VIA POLYHEDRAL RISK FUNCTIONALS the dynamic decision structure appropriately. In energy risk management, which is typically carried out ex, for integrating risk management into a stochastic optimization framework, risk has to be quantified in a definite

  6. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    TRAFFIC RISK ASSESSMENT (VTRA) 2010 POTENTIAL GROUNDING OIL LOSS - PGO Draft #12;11/17/2013 5 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 POTENTIAL GROUNDING OIL LOSS - PGO Draft #12;Q: GW 487 3D RiskVESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Grounding

  7. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    -VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 POTENTIAL COLLISION OIL LOSS - PCO Draft #12;11/17/2013 5 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 POTENTIAL COLLISION OIL LOSS - PCO Draft #12;Q: GW 487 3D RiskVESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Collision

  8. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Oil Time Exposure Dr-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 OIL TIME EXPOSURE- OTE #12;12/23/2013 5 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 OIL TIME EXPOSURE- OTE #12;T: GW - KM - DP 3D Risk Profile What-If FV - Oil

  9. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Oil Time Exposure Dr RISK ASSESSMENT (VTRA) 2010 Draft #12;P: BC & DH100 3D Risk Profile All FV - Oil Time Exposure: 100 Draft #12;11/18/2013 4 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 OIL TIME EXPOSURE- OTE Draft

  10. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    TRAFFIC RISK ASSESSMENT (VTRA) 2010 POTENTIAL GROUNDING OIL LOSS - PGO Draft #12;11/17/2013 5 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 POTENTIAL GROUNDING OIL LOSS - PGO Draft #12;R: KM 348 3D RiskVESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Grounding

  11. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Oil Time Exposure Dr TRAFFIC RISK ASSESSMENT (VTRA) 2010 OIL TIME EXPOSURE- OTE #12;12/23/2013 5 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 OIL TIME EXPOSURE- OTE #12;T: GW - KM - DP 3D Risk Profile What-If FV - Oil Time

  12. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Oil Time Exposure Dr TRAFFIC RISK ASSESSMENT (VTRA) 2010 OIL TIME EXPOSURE- OTE #12;11/20/2013 5 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 OIL TIME EXPOSURE- OTE #12;T: GW - KM - DP 3D Risk Profile What-If FV - Oil Time

  13. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    -VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 POTENTIAL COLLISION OIL LOSS - PCO Draft #12;11/17/2013 5 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 POTENTIAL COLLISION OIL LOSS - PCO Draft #12;R: KM 348 3D RiskVESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Collision

  14. Livestock Risk Protection Insurance for Fed Cattle

    E-Print Network [OSTI]

    Farritor, Shane

    G2257 Livestock Risk Protection Insurance for Fed Cattle Jim Jansen, Beef Systems ExtensionNebGuidediscussestheuseofLivestockRisk Protection (LRP) Insurance as a price risk tool for fed cattle producers. The USDA's Risk Management Agency) Insurance. LRPis a price-risk manage- ment tool available to feeder and fed cattle producers as well

  15. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Collision;11/22/2013 2 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 DEFINITION OF ASSUMED LOCATIONS FOR ADDED ESCORT GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 Draft #12;T: GW - KM - DP & ER 3D Risk Profile All

  16. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Grounding GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 Draft #12;T : GW - KM - DP & +VAR FV 3D Risk ASSESSMENT (VTRA) 2010 12/23/2013 3 GW-VCU Draft #12;12/23/2013 4 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA

  17. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Collision;11/22/2013 2 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 DEFINITION OF ASSUMED LOCATIONS FOR ADDED ESCORT RISK ASSESSMENT (VTRA) 2010 11/22/2013 3 GW-VCU Draft #12;T: GW - KM - DP & ER 3D Risk Profile All FV

  18. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Oil Time Exposure Dr-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 DEFINITION OF ASSUMED LOCATIONS FOR ADDED ESCORT VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 Draft #12;T: GW - KM - DP & ER 3D Risk Profile All FV - Oil Time

  19. VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010

    E-Print Network [OSTI]

    van Dorp, Johan René

    VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 3D Relative Risk Profile Comparison Potential Collision GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA) 2010 Draft #12;U : GW - KM - DP & VAR 3D Risk Profile ASSESSMENT (VTRA) 2010 11/21/2013 3 GW-VCU Draft #12;11/21/2013 4 GW-VCU VESSEL TRAFFIC RISK ASSESSMENT (VTRA

  20. Reducing Greenhouse Gas Emissions for Climate Stabilization

    E-Print Network [OSTI]

    Thomas, David D.

    Reducing Greenhouse Gas Emissions for Climate Stabilization: Framing Regional Options L A U R A S C reduction of global greenhouse gas (GHG) emissions by as much as 80% by 2050. Subnational efforts to cut The call to cut global greenhouse gas (GHG) emissions by up to 80% below 2000 levels, which researchers

  1. Reduced models of algae growth Heikki Haario,

    E-Print Network [OSTI]

    Bardsley, John

    Reduced models of algae growth Heikki Haario, Leonid Kalachev Marko Laine, Lappeenranta University of the phenomena studied. Here, in the case of algae growth modelling, we show how a systematic model reduction may: Algae growth modelling, asymptotic methods, model reduction, MCMC, Adaptive Markov chain Monte Carlo. 1

  2. WASTE DESCRIPTION TYPE OF PROJECT POUNDS REDUCED,

    E-Print Network [OSTI]

    for reduction in mixed waste generation Pump Oil Substitution 51 Hazardous Waste / Industrial Waste $3,520 $6 with the subsequent clean up costs ($15,000). Hydraulic Oil Product Substitution 3,000 Industrial Waste $26,000 $0 $26WASTE DESCRIPTION TYPE OF PROJECT POUNDS REDUCED, REUSED, RECYCLED OR CONSERVED IN 2003 WASTE TYPE

  3. WASTE DESCRIPTION TYPE OF PROJECT POUNDS REDUCED,

    E-Print Network [OSTI]

    reflect avoided waste disposal costs and lower material purchase costs ($6000) Hydraulic Oil ProductWASTE DESCRIPTION TYPE OF PROJECT POUNDS REDUCED, REUSED, RECYCLED OR CONSERVED IN 2002 WASTE TYPE DESCRIPTION DETAILS * Electrophoretic Mini-Gels Microscale Chemical Use 2,200 Hazardous Waste - Lab Pack $10

  4. WASTE DESCRIPTION TYPE OF PROJECT POUNDS REDUCED,

    E-Print Network [OSTI]

    . Removed grit and sludge are mixed with the waste oil. Photon-counting spectrofluorimeter Substitution 54 or composted at the stump dump. Plant Engineering grounds vehicle wash system * Waste minimization 8,000 OilsWASTE DESCRIPTION TYPE OF PROJECT POUNDS REDUCED, REUSED, RECYCLED OR CONSERVED IN 2007 WASTE TYPE

  5. Reduced No.sub.x combustion method

    DOE Patents [OSTI]

    Delano, Mark A. (Briarcliff Manor, NY)

    1991-01-01

    A combustion method enabling reduced NO.sub.x formation wherein fuel and oxidant are separately injected into a combustion zone in a defined velocity relation, combustion gases are aspirated into the oxidant stream prior to intermixture with the fuel, and the fuel is maintained free from contact with oxygen until the intermixture.

  6. Light gas gun with reduced timing jitter

    DOE Patents [OSTI]

    Laabs, G.W.; Funk, D.J.; Asay, B.W.

    1998-06-09

    Gas gun with reduced timing jitter is disclosed. A gas gun having a prepressurized projectile held in place with a glass rod in compression is described. The glass rod is destroyed with an explosive at a precise time which allows a restraining pin to be moved and free the projectile. 4 figs.

  7. Light gas gun with reduced timing jitter

    DOE Patents [OSTI]

    Laabs, Gary W. (Los Alamos, NM); Funk, David J. (Los Alamos, NM); Asay, Blaine W. (Los Alamos, NM)

    1998-01-01

    Gas gun with reduced timing jitter. A gas gun having a prepressurized projectile held in place with a glass rod in compression is described. The glass rod is destroyed with an explosive at a precise time which allows a restraining pin to be moved and free the projectile.

  8. Projection screen having reduced ambient light scattering

    DOE Patents [OSTI]

    Sweatt, William C. (Albuquerque, NM)

    2010-05-11

    An apparatus and method for improving the contrast between incident projected light and ambient light reflected from a projection screen are described. The efficiency of the projection screen for reflection of the projected light remains high, while permitting the projection screen to be utilized in a brightly lighted room. Light power requirements from the projection system utilized may be reduced.

  9. SATURATION COMPENSATING INPUT SHAPERS FOR REDUCING VIBRATION

    E-Print Network [OSTI]

    Singhose, William

    input shaper and feedback controller was successfully implemented by Drapeau and Wang on a five-bar The Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta, GA 30332, USA ABSTRACT Input shaping can be used to eliminate or greatly reduce residual vibration of flexible mechanical

  10. Reduced MHD in Nearly Potential Magnetic Fields

    E-Print Network [OSTI]

    Strauss, Hank

    Reduced MHD in Nearly Potential Magnetic Fields H.R. Strauss Courant Institute of Mathematical that the magnetic field is close to a potential field. The potential field can have an arbitrary three dimensional. It is also the case in solar and stellar coronal magnetic fields, and in regions of the geomagnetic field

  11. PRA and Risk Informed Analysis

    SciTech Connect (OSTI)

    Bernsen, Sidney A.; Simonen, Fredric A.; Balkey, Kenneth R.

    2006-01-01

    The Boiler and Pressure Vessel Code (BPVC) of the American Society of Mechanical Engineers (ASME) has introduced a risk based approach into Section XI that covers Rules for Inservice Inspection of Nuclear Power Plant Components. The risk based approach requires application of the probabilistic risk assessments (PRA). Because no industry consensus standard existed for PRAs, ASME has developed a standard to evaluate the quality level of an available PRA needed to support a given risk based application. The paper describes the PRA standard, Section XI application of PRAs, and plans for broader applications of PRAs to other ASME nuclear codes and standards. The paper addresses several specific topics of interest to Section XI. Important consideration are special methods (surrogate components) used to overcome the lack of PRA treatments of passive components in PRAs. The approach allows calculations of conditional core damage probabilities both for component failures that cause initiating events and failures in standby systems that decrease the availability of these systems. The paper relates the explicit risk based methods of the new Section XI code cases to the implicit consideration of risk used in the development of Section XI. Other topics include the needed interactions of ISI engineers, plant operating staff, PRA specialists, and members of expert panels that review the risk based programs.

  12. Risk assessment in international operations

    SciTech Connect (OSTI)

    Stricklin, Daniela L.

    2008-11-15

    During international peace-keeping missions, a diverse number of non-battle hazards may be encountered, which range from heavily polluted areas, endemic disease, toxic industrial materials, local violence, traffic, and even psychological factors. Hence, elevated risk levels from a variety of sources are encountered during deployments. With the emphasis within the Swedish military moving from national defense towards prioritization of international missions in atypical environments, the risk of health consequences, including long term health effects, has received greater consideration. The Swedish military is interested in designing an optimal approach for assessment of health threats during deployments. The Medical Intelligence group at FOI CBRN Security and Defence in Umea has, on request from and in collaboration with the Swedish Armed Forces, reviewed a variety of international health threat and risk assessment models for military operations. Application of risk assessment methods used in different phases of military operations will be reviewed. An overview of different international approaches used in operational risk management (ORM) will be presented as well as a discussion of the specific needs and constraints for health risk assessment in military operations. This work highlights the specific challenges of risk assessment that are unique to the deployment setting such as the assessment of exposures to a variety of diverse hazards concurrently.

  13. Resource allocation using risk analysis

    SciTech Connect (OSTI)

    Bott, T. F. (Terrence F.); Eisenhawer, S. W. (Stephen W.)

    2003-01-01

    Allocating limited resources among competing priorities is an important problem in management. In this paper we describe an approach to resource allocation using risk as a metric. We call this approach the Logic-Evolved Decision (LED) approach because we use logic-models to generate an exhaustive set of competing options and to describe the often highly complex model used for evaluating the risk reduction achieved by different resource allocations among these options. The risk evaluation then proceeds using probabilistic or linguistic input data.

  14. Financial Policy Manual RISK MANAGEMENT POLICIES

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    Financial Policy Manual Page 1 RISK MANAGEMENT POLICIES 2601 Departmental Scope & Responsibility;Financial Policy Manual Page 1 2601 DEPARTMENTAL SCOPE & RESPONSIBILITY Subject: Risk Management & Insurance Effective: December 1986 Revised: May 2011 Last Reviewed: March 2014 Resp. Office: Risk Management

  15. UNIVERSITY OF ABERDEEN RISK MANAGEMENT POLICY & PROCEDURES

    E-Print Network [OSTI]

    Neri, Peter

    UNIVERSITY OF ABERDEEN RISK MANAGEMENT POLICY & PROCEDURES 1 INTRODUCTION This document sets out the policy and procedures for risk management within the University and replaces earlier documentation. The risk management process is formally integrated with the University's strategic planning process

  16. Capacity Factor Risk At Nuclear Power Plants

    E-Print Network [OSTI]

    Du, Yangbo

    We develop a model of the dynamic structure of capacity factor risk. It incorporates the risk that the capacity factor may vary widely from year-to-year, and also the risk that the reactor may be permanently shutdown prior ...

  17. Assessing Coronary Risk Assessment: What's Next?

    E-Print Network [OSTI]

    Fiscella, Kevin; Franks, Peter

    2010-01-01

    KZ, Steinman MA. Coronary risk assessment by point-based vs.Educa- tion Program risk assessment and potential for riskrecord-based cardiac risk assessment and identification of

  18. UK Climate Change Risk Assessment and National

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    UK Climate Change Risk Assessment and National Adaptation Programme Meg Patel Defra #12;Legislative Framework Climate Change Act 2008 Adaptation Reporting Power 2011 Climate Change Risk Assessment: Climate Change Risk Assessment Elevensectors(forinitial analysis) Health Energy Transport Built

  19. DYNAMIC RISK MANAGEMENT IN ELECTRICITY PORTFOLIO OPTIMIZATION

    E-Print Network [OSTI]

    Eichhorn, Andreas

    DYNAMIC RISK MANAGEMENT IN ELECTRICITY PORTFOLIO OPTIMIZATION VIA POLYHEDRAL RISK FUNCTIONALS production and trading based on probabilistic knowledge about future uncertainties such as demands and spot- called polyhedral risk functionals which, though being non-linear mappings, preserve linearity structures

  20. Risk assessment framework for geologic carbon sequestration sites

    E-Print Network [OSTI]

    Oldenburg, C.

    2010-01-01

    carbon sequestration risk assessment, in Carbon Dioxidecarbon sequestration risk assessment, Energy Procedia,Risk Assessment Framework for Geologic Carbon Sequestration

  1. Financial Risk Analysis and Heavy Tails 1 Historical Discussion of Risk and Return

    E-Print Network [OSTI]

    Taqqu, Murad

    Financial Risk Analysis and Heavy Tails 1 Historical Discussion of Risk and Return ffl Brief history of financial risk ffl Mean­Variance Portfolio Theory by Markowitz ffl Risk and Factor models ffl Value at Risk 2 More on Value at Risk ffl Historical Simulation ffl Parametric VaR -- present different

  2. Financial Risk Analysis and Heavy Tails 1 Historical Discussion of Risk and Return

    E-Print Network [OSTI]

    Taqqu, Murad

    Financial Risk Analysis and Heavy Tails 1 Historical Discussion of Risk and Return Brief history of nancial risk Mean-Variance Portfolio Theory by Markowitz Risk and Factor models Value at Risk 2 More on Value at Risk Historical Simulation Parametric VaR present di erent distributional models give overview

  3. Decreased Funding Reduces Orders Timeline Citing the impact of reduced funding, Navy

    E-Print Network [OSTI]

    Decreased Funding Reduces Orders Timeline Citing the impact of reduced funding, Navy announced Feb that allows for continuous normal operations while a final budget is approved. Navy Personnel Command the orders are released. Navy has utilized this prioritization strategy in previous PCS funding

  4. Spatial Analysis of Health Risk Perception, Agenda and Position Papers

    E-Print Network [OSTI]

    Center for Spatially Integrated Social Science

    2003-01-01

    Risk perception. Ch 5 of Risk Analysis, Perception andworkplace methodology. Risk Analysis, 23, 311-324. Henwood,classic dilemmas in risk analysis. The perception of health

  5. Recognizing and Assigning ESPC Risks and Responsibilities Using...

    Office of Environmental Management (EM)

    ESPC Risks and Responsibilities Using the Risk, Responsibility, and Performance Matrix Recognizing and Assigning ESPC Risks and Responsibilities Using the Risk,...

  6. Enterprise Risk Management: Review, Critique, and Research Directions

    E-Print Network [OSTI]

    Bromiley, P; McShane, M; Nair, A; Rustambekov, E

    2015-01-01

    include enterprise-wide risk management, risk contingencyvalue of enterprise risk management has been accepted forAS/NZS, 1995. 4360 Risk Management Standard. from. http://

  7. Probabilistic risk assessment course documentation. Volume 1: PRA fundamentals

    SciTech Connect (OSTI)

    Breeding, R J; Leahy, T J; Young, J

    1985-08-01

    The full range of PRA topics is presented, with a special emphasis on systems analysis and PRA applications. Systems analysis topics include system modeling such as fault tree and event tree construction, failure rate data, and human Reliability. The discussion of PRA applications is centered on past and present PRA based programs, such as WASH-1400 and the Interim Reliability Evaluation Program, as well as on some of the potential future applications of PRA. The relationship of PRA to generic safety issues such as station blackout and Anticipated Transient Without Scram (ATWS) is also discussed. In addition to system modeling, the major PRA tasks of accident process analysis, and consequence analysis are presented. An explanation of the results of these activities, and the techniques by which these results are derived, forms the basis for a discussion of these topics. An additional topic which is presented in this course is the topic of PRA management, organization, and evaluation. 84 figs., 41 tabs.

  8. AMERIND Risk Annual Conference and Trade Fair

    Broader source: Energy.gov [DOE]

    Hosted by the AMERIND Risk, this three-day conference includes trainings in risk management, workers' safety, human resources, and more.

  9. Probabilistic risk analysis of building contamination Introduction

    E-Print Network [OSTI]

    Bolster, Diogo

    Probabilistic risk analysis of building contamination Introduction Accurate and verifiable, San Diego, La Jolla, CA, USA Key words: Ventilation contaminant; Risk analysis; Probabilistic

  10. Cybersecurity Risk Management Process (RMP) Guideline - Final...

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

    Cybersecurity Risk Management Process (RMP) Guideline - Final (May 2012) Cybersecurity Risk Management Process (RMP) Guideline - Final (May 2012) This electricity subsector...

  11. A brief discourse on credit risk 

    E-Print Network [OSTI]

    Reiser, Georg Johannes

    1997-01-01

    This paper reviews existing models for credit risk. Different approaches for credit risk for fixed interest investments and for derivatives are discussed....

  12. Risk Aversion in Inventory Management

    E-Print Network [OSTI]

    Chen, Xin

    Traditional inventory models focus on risk-neutral decision makers, i.e., characterizing replenishment strategies that maximize expected total profit, or equivalently, minimize expected total cost over a planning horizon. ...

  13. ORISE: Crisis and Risk Communication

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

    of the U.S. Department of Energy (DOE) Oak Ridge Office (ORO), ORISE provides crisis and risk communication support through the management of its Joint Information Center (JIC)...

  14. ESSAYS ON INTERNATIONAL RISK SHARING

    E-Print Network [OSTI]

    Nguyen, Huy Quoc

    2014-12-31

    on consumption. Measuring the extent of international risk sharing (IRS) remains an open empirical question. This dissertation provides a new approach to measuring the extent of IRS for countries and conditions for the measure of consumption correlation to hold...

  15. Integrated risk information system (IRIS)

    SciTech Connect (OSTI)

    Tuxen, L.

    1990-12-31

    The Integrated Risk Information System (IRIS) is an electronic information system developed by the US Environmental Protection Agency (EPA) containing information related to health risk assessment. IRIS is the Agency`s primary vehicle for communication of chronic health hazard information that represents Agency consensus following comprehensive review by intra-Agency work groups. The original purpose for developing IRIS was to provide guidance to EPA personnel in making risk management decisions. This original purpose for developing IRIS was to guidance to EPA personnel in making risk management decisions. This role has expanded and evolved with wider access and use of the system. IRIS contains chemical-specific information in summary format for approximately 500 chemicals. IRIS is available to the general public on the National Library of Medicine`s Toxicology Data Network (TOXNET) and on diskettes through the National Technical Information Service (NTIS).

  16. Risk and Realities | Jefferson Lab

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

    knowledge of what is going to happen. We look to the newspapers as one source of the risk analysis. I and our representatives also visit with our congressional representatives...

  17. Inherited risk for common disease

    E-Print Network [OSTI]

    Banava, Helen

    2007-01-01

    Linkage disequilibrium studies have discovered few gene-disease associations for common diseases. The explanation has been offered that complex modes of inheritance govern risk for cancers, cardiovascular and cerebrovascular ...

  18. Utility View of Risk Assessment 

    E-Print Network [OSTI]

    Bickham, J.

    1985-01-01

    This paper will address a utility perspective in regard to risk assessment, reliability, and impact on the utility system. Discussions will also include the critical issues for utilities when contracting for energy and capacity from cogenerators...

  19. Risk Management In Major Projects 

    E-Print Network [OSTI]

    Baker, Scott William

    The integration of risk management in major projects within the construction and oil and gas industries has never been more significant especially as these projects are becoming larger and more complex. The increased ...

  20. Quantum cryptographic system with reduced data loss

    DOE Patents [OSTI]

    Lo, H.K.; Chau, H.F.

    1998-03-24

    A secure method for distributing a random cryptographic key with reduced data loss is disclosed. Traditional quantum key distribution systems employ similar probabilities for the different communication modes and thus reject at least half of the transmitted data. The invention substantially reduces the amount of discarded data (those that are encoded and decoded in different communication modes e.g. using different operators) in quantum key distribution without compromising security by using significantly different probabilities for the different communication modes. Data is separated into various sets according to the actual operators used in the encoding and decoding process and the error rate for each set is determined individually. The invention increases the key distribution rate of the BB84 key distribution scheme proposed by Bennett and Brassard in 1984. Using the invention, the key distribution rate increases with the number of quantum signals transmitted and can be doubled asymptotically. 23 figs.