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Book Resilience Analysis of Nuclear Fuel Cycle Scenarios

Download or read book Resilience Analysis of Nuclear Fuel Cycle Scenarios written by Weifeng Zhou and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear fuel cycle systems, composed of reactors, various fuels, and different cycle facilities, are complex and in constant evolution. Thanks to their abilities to make projections of industrial strategies and to assess the associated impacts on nuclear fuel cycle systems, nuclear fuel cycle scenarios are considered as a powerful tool for decision-making analyses. Scenario studies assist decision-makers in identifying the strengths and weaknesses of different strategies for a nuclear fleet evolution and then proposing possible evolution trajectories for the nuclear industry according to constraints from physics, economics, industry, etc.However, scenario studies are usually subject to different kinds of uncertainties, especially the so-called “deep uncertainty.” This concept refers to “unknown unknowns,” which scenario study results are unsuited to address. Indeed, under the impact of deep uncertainty, i.e., disruptions, the trajectories proposed by the scenario studies can become invalid: they do not satisfy the scenario constraints anymore.In order to make the trajectories valid again after disruption due to uncertainty, the first possibility is to study the resistance strategy. The resistance strategy consists of finding scenario trajectories that remain valid under the impact of uncertainty without exogenous readjustments of trajectories. However, the resistance capabilities of scenarios are limited: resistance is only adapted to uncertainties with small impact, while the impact of deep uncertainty is usually strong.As a complementary solution to the resistance strategy, we propose using resilience strategies. The resilience strategies consist of using predesigned measures, called “levers,” to readjust the scenario trajectory when the resistance strategy is insufficient. We aim to use the effect of the exogenous readjustments of trajectories, which are introduced through the levers, to counterbalance the impact of disruption and remain the trajectory valid. To evaluate the resilience of scenarios, we developed a resilience analysis framework, based on the start-of-the-art SUR (Stepwise Uncertainty Reduction) algorithm.We applied the developed resilience strategy to two scenario problems in which a simplified French nuclear fleet with uncertain power reduction is considered. To define the validity of trajectory, we imposed five constraints about the reprocessing plant utilization ratio, plutonium separation, plutonium content in MOX fuel, and spent fuel storage. In each problem, we gave a prior trajectory supposed as a result of a scenario study with a hypothesis to keep the installed power constant in the future. We assumed that following the disruption of the study context, the total electricity power is disrupted and reduced in the future. The results showed that the prior trajectories in both problems are resilient for the assumed disruptions: it is possible to keep the prior trajectories valid by readjusting the reprocessing and the MOX fuel loadings in reactors. Such results demonstrate the evolutions of the nuclear fleet in the prior trajectories are flexible in front of the disruption of total electricity power.

Book Improved Building Methodology and Analysis of Delay Scenarios of Advanced Nuclear Fuel Cycles with the Verifiable Fuel Cycle Simulation Model  VISION

Download or read book Improved Building Methodology and Analysis of Delay Scenarios of Advanced Nuclear Fuel Cycles with the Verifiable Fuel Cycle Simulation Model VISION written by Tyler Martin Schweitzer and published by . This book was released on 2008 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: Advanced Nuclear Fuel Cycles.

Book Analysis of Uncertainty Propagation in Nuclear Fuel Cycle Scenarios

Download or read book Analysis of Uncertainty Propagation in Nuclear Fuel Cycle Scenarios written by Guillaume Krivtchik and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear scenario studies model nuclear fleet over a given period. They enablethe comparison of different options for the reactor fleet evolution, and the management ofthe future fuel cycle materials, from mining to disposal, based on criteria such as installedcapacity per reactor technology, mass inventories and flows, in the fuel cycle and in the waste.Uncertainties associated with nuclear data and scenario parameters (fuel, reactors and facilitiescharacteristics) propagate along the isotopic chains in depletion calculations, and throughoutthe scenario history, which reduces the precision of the results. The aim of this work isto develop, implement and use a stochastic uncertainty propagation methodology adaptedto scenario studies. The method chosen is based on development of depletion computationsurrogate models, which reduce the scenario studies computation time, and whose parametersinclude perturbations of the depletion model; and fabrication of equivalence model which takeinto account cross-sections perturbations for computation of fresh fuel enrichment. Then theuncertainty propagation methodology is applied to different scenarios of interest, consideringdifferent options of evolution for the French PWR fleet with SFR deployment.

Book Analysis of Fuel Cycle Scenarios for Transmutation of Nuclear Waste

Download or read book Analysis of Fuel Cycle Scenarios for Transmutation of Nuclear Waste written by Alexandra Ålander and published by . This book was released on 2005 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Development of the Global Evaluation of Nuclear Infrastructure and Utilization Scenarios  GENIUS  Nuclear Fuel Cycle Systems Analysis Code

Download or read book Development of the Global Evaluation of Nuclear Infrastructure and Utilization Scenarios GENIUS Nuclear Fuel Cycle Systems Analysis Code written by Christopher Alan Juchau and published by . This book was released on 2008 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Methodology for Uncertainty Analysis of Advanced Fuel Cycles and Preliminary Results

Download or read book Methodology for Uncertainty Analysis of Advanced Fuel Cycles and Preliminary Results written by and published by . This book was released on 2006 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report assesses the sensitivity and uncertainty associated with certain advanced nuclear fuel cycles due to the variance of chosen parameters and how these results relate to the deep geological nuclear waste repository. High burn up uranium oxide, mixed oxide, and fast spectrum nuclear fuels are the advanced fuel cycles considered. The parameters that are varied in these cases are: the time of advanced fuel implementation, energy growth rate, fuel burn up, and reprocessing introduction and capacity. The results analyzed are the amount of spent fuel and the amount of Pu in spent fuel in the year 2099. The advanced fuel cycle scenarios are modeled using the DANESS code developed by Argonne National Laboratory. All the fuel cycles modeled in this report are highly sensitive to the above-mentioned varied parameters. In a 0% energy growth rate case the plutonium fast burner reactor significantly reduces the amount of waste destined to the repository. Compared to current once-through fuel cycle practices, the fast reactor reduces waste by 50-52 percent. As energy demand grows, the high burn up case of 100 (GWd per ton heavy metal) fuel, as modeled in this thesis, reduces the mass destined for the repository greatest. In the 1.5% energy growth rate, spent fuel mass is reduced 32-44 percent, and in the 3.0% energy growth rate those numbers are 43-49 percent.

Book Sensitivity Analysis and Optimization of the Nuclear Fuel Cycle

Download or read book Sensitivity Analysis and Optimization of the Nuclear Fuel Cycle written by Stefano Passerini and published by . This book was released on 2012 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: For decades, nuclear energy development was based on the expectation that recycling of the fissionable materials in the used fuel from today's light water reactors into advanced (fast) reactors would be implemented as soon as technically feasible in order to extend the nuclear fuel resources. More recently, arguments have been made for deployment of fast reactors in order to reduce the amount of higher actinides, hence the longevity of radioactivity, in the materials destined to a geologic repository. The cost of the fast reactors, together with concerns about the proliferation of the technology of extraction of plutonium from used LWR fuel as well as the large investments in construction of reprocessing facilities have been the basis for arguments to defer the introduction of recycling technologies in many countries including the US. In this thesis, the impacts of alternative reactor technologies on the fuel cycle are assessed. Additionally, metrics to characterize the fuel cycles and systematic approaches to using them to optimize the fuel cycle are presented. The fuel cycle options of the 2010 MIT fuel cycle study are re-examined in light of the expected slower rate of growth in nuclear energy today, using the CAFCA (Code for Advanced Fuel Cycle Analysis). The Once Through Cycle (OTC) is considered as the base-line case, while advanced technologies with fuel recycling characterize the alternative fuel cycle options available in the future. The options include limited recycling in LWRs and full recycling in fast reactors and in high conversion LWRs. Fast reactor technologies studied include both oxide and metal fueled reactors. Additional fuel cycle scenarios presented for the first time in this work assume the deployment of innovative recycling reactor technologies such as the Reduced Moderation Boiling Water Reactors and Uranium-235 initiated Fast Reactors. A sensitivity study focused on system and technology parameters of interest has been conducted to test the robustness of the conclusions presented in the MIT Fuel Cycle Study. These conclusions are found to still hold, even when considering alternative technologies and different sets of simulation assumptions. Additionally, a first of a kind optimization scheme for the nuclear fuel cycle analysis is proposed and the applications of such an optimization are discussed. Optimization metrics of interest for different stakeholders in the fuel cycle (economics, fuel resource utilization, high level waste, transuranics/proliferation management, and environmental impact) are utilized for two different optimization techniques: a linear one and a stochastic one. Stakeholder elicitation provided sets of relative weights for the identified metrics appropriate to each stakeholder group, which were then successfully used to arrive at optimum fuel cycle configurations for recycling technologies. The stochastic optimization tool, based on a genetic algorithm, was used to identify non-inferior solutions according to Pareto's dominance approach to optimization. The main tradeoff for fuel cycle optimization was found to be between economics and most of the other identified metrics.

Book A Decision Analysis Framework for the U S  Nuclear Fuel Cycle

Download or read book A Decision Analysis Framework for the U S Nuclear Fuel Cycle written by Lara Marie Pierpoint and published by . This book was released on 2011 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: If we are willing to pay a premium, we may be able to mitigate some of the long-lasting impacts of nuclear waste. Deciding how to navigate this tradeoff, between cost and waste, is a central challenge for stewards of nuclear power. It is made more difficult by uncertainties that characterize the global future of nuclear electricity generation. The recent increase in concern about climate change has prompted U.S. policymakers to back strategies favorable toward nuclear power, so much so that some experts see a "nuclear renaissance" on the horizon. Whether such a renaissance will come to pass, involving the construction of a vast new fleet of nuclear plants, is unclear - especially in light of the March 2011 nuclear accident at the Fukushima Daiichi reactors in Japan. Even more unclear is what should be done with the commercial U.S. nuclear waste, given an array of technical options and a large amount of uncertainty about how much waste will ultimately need to be managed. This study introduces a framework for analysis of strategies to evolve the nuclear fuel cycle which may be helpful in analyzing decision problems for similarly complex, long-lived technical infrastructure systems. The framework consists of a system dynamics simulation coupled with a decision analysis model. The system dynamics code is developed specifically for this study to be simple, fast-running, and also to echo the results of many previous nuclear fuel cycle simulations in demonstrating how various technical options impact important parameters (like uranium consumed, waste generated, etc.). Code results are benchmarked to more complex fuel cycle simulations for the parameters relevant to the decision space. The decision analysis model takes information from the simulation and makes it useful to policymakers, by allowing the explicit analysis of desirable decision pathways under uncertainty, and also considering tradeoffs among system goals. The framework is applied to three nuclear systems, the light-water reactor (LWR) once through fuel cycle, which represents the status quo, an advanced, traditional, plutonium-fed self sustaining fast reactor fuel cycle, and a fast reactor fuel cycle for which initial fast reactor cores are composed of enriched uranium rather than recycled LWR fuel. Fast reactors are highly likely to cost more than LWRs, but they can produce electricity from some of the elements that most plague the long-term management of a nuclear waste repository. A value function compares how these options fare under different scenarios, incorporating system-wide costs and the system waste burden as the two attributes in the function. The primary result is that the best strategy, under a strong preference for eliminating LWR spent nuclear fuel waste, consists of building a few traditional fast reactors now, and then building a full fleet more rapidly later in the century. This allows both for a significant amount of waste mitigation compared to an all-LWR fuel cycle, and for the costs associated with the more expensive fast reactor technology to be incurred primarily later in the century. On the other hand, if cost is the main consideration, the framework advises moving forward with the once-through LWR fuel cycle and avoiding fast reactors altogether, or at least until later in the century. These results are examined from a traditional decision analysis perspective, and then from one that departs somewhat from the assumption of a fully powerful decision maker. In reality, a government decision maker can only offer incentives to industry in order to induce a strategy change. Changing the decision model to reflect this reality causes the framework to more strongly advise moving forward with traditional fast reactors. This occurs because any single attempt at offering incentives to industry might be unsuccessful, and thus prevent a waste concerned government from achieving any significant mitigation. The most important contribution of the methodology is its ability to illuminate which parameters represent strong drivers of system decisions. Preferences across competing attributes are always important: in general, if decision maker preferences for reducing cost vs. waste were to shift significantly, the framework would show a change in the desirable decision strategy. Decision results are not very sensitive, on the other hand, to the rate of nuclear power growth or to the cost of fast reactor technology. A second contribution comes from the initial foray into studying a more complex decision maker perspective, and shows how a different view can complement results using the traditional decision analysis assumption of an "ideal" decision maker. Ultimately, the system dynamics/decision analysis framework presented here helps identify desirable pathways for complex system evolution, identifies factors that bear strongly on decisions and which are deserving of more study, and begins to show how strategy implementation can be considered within the framework in order to further improve decision-making.

Book Nuclear Fuel Cycle System Simulation Tool Based on High fidelity Component Modeling

Download or read book Nuclear Fuel Cycle System Simulation Tool Based on High fidelity Component Modeling written by and published by . This book was released on 2014 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The DOE is currently directing extensive research into developing fuel cycle technologies that will enable the safe, secure, economic, and sustainable expansion of nuclear energy. The task is formidable considering the numerous fuel cycle options, the large dynamic systems that each represent, and the necessity to accurately predict their behavior. The path to successfully develop and implement an advanced fuel cycle is highly dependent on the modeling capabilities and simulation tools available for performing useful relevant analysis to assist stakeholders in decision making. Therefore a high-fidelity fuel cycle simulation tool that performs system analysis, including uncertainty quantification and optimization was developed. The resulting simulator also includes the capability to calculate environmental impact measures for individual components and the system. An integrated system method and analysis approach that provides consistent and comprehensive evaluations of advanced fuel cycles was developed. A general approach was utilized allowing for the system to be modified in order to provide analysis for other systems with similar attributes. By utilizing this approach, the framework for simulating many different fuel cycle options is provided. Two example fuel cycle configurations were developed to take advantage of used fuel recycling and transmutation capabilities in waste management scenarios leading to minimized waste inventories.

Book The Nuclear Fuel Cycle

Download or read book The Nuclear Fuel Cycle written by Robert G. Cochran and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revised edition presents a detailed description of the entire nuclear fuel cycle from production to use in a reactor to final disposal, as well as a general review of reactor physics, radioactive waste management, and the economics and environmental effects of nuclear power. This volume is intended to serve both as a text for senior- and graduate-level students and as a valuable reference for practicing engineers in the nuclear field. It includes the latest data, techniques, computing methods, and regulations, as well as extensive reference lists, bibliographies, numerical examples, and problems for students assignments.

Book Resilience  A New Paradigm of Nuclear Safety

Download or read book Resilience A New Paradigm of Nuclear Safety written by Joonhong Ahn and published by Springer. This book was released on 2017-08-15 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is published open access under a CC BY 4.0 license. This book summarizes presentations and discussions from the two-day international workshop held at UC Berkeley in March 2015, and derives questions to be addressed in multi-disciplinary research toward a new paradigm of nuclear safety. The consequences of the Fukushima Daiichi nuclear accident in March 2011 have fuelled the debate on nuclear safety: while there were no casualties due to radiation, there was substantial damage to local communities. The lack of common understanding of the basics of environmental and radiological sciences has made it difficult for stakeholders to develop effective strategies to accelerate recovery, and this is compounded by a lack of effective decision-making due to the eroded public trust in the government and operators. Recognizing that making a society resilient and achieving higher levels of safety relies on public participation in and feedback on decision-making, the book focuses on risk perception and mitigation in its discussion of the development of resilient communities.

Book Nuclear Power and Sustainable Development

Download or read book Nuclear Power and Sustainable Development written by International Atomic Energy Agency and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transforming the energy system is at the core of the dedicated sustainable development goal on energy within the new United Nations development agenda. This publication explores the possible contribution of nuclear energy to addressing the issues of sustainable development through a large selection of indicators. It reviews the characteristics of nuclear power in comparison with alternative sources of electricity supply, according to economic, social and environmental pillars of sustainability. The findings summarized in this publication will help the reader to consider, or reconsider, the contribution that can be made by the development and operation of nuclear power plants in contributing to more sustainable energy systems.

Book Fast Spectrum Reactors

Download or read book Fast Spectrum Reactors written by Alan E. Waltar and published by Springer Science & Business Media. This book was released on 2011-09-28 with total page 717 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a complete update of the classic 1981 FAST BREEDER REACTORS textbook authored by Alan E. Waltar and Albert B. Reynolds, which , along with the Russian translation, served as a major reference book for fast reactors systems. Major updates include transmutation physics (a key technology to substantially ameliorate issues associated with the storage of high-level nuclear waste ), advances in fuels and materials technology (including metal fuels and cladding materials capable of high-temperature and high burnup), and new approaches to reactor safety (including passive safety technology), New chapters on gas-cooled and lead-cooled fast spectrum reactors are also included. Key international experts contributing to the text include Chaim Braun, (Stanford University) Ronald Omberg, (Pacific Northwest National Laboratory, Massimo Salvatores (CEA, France), Baldev Raj, (Indira Gandhi Center for Atomic Research, India) , John Sackett (Argonne National Laboratory), Kevan Weaver, (TerraPower Corporation) ,James Seinicki(Argonne National Laboratory). Russell Stachowski (General Electric), Toshikazu Takeda (University of Fukui, Japan), and Yoshitaka Chikazawa (Japan Atomic Energy Agency).

Book Enhancing Security  Sustainability and Resilience in Energy  Food and Water

Download or read book Enhancing Security Sustainability and Resilience in Energy Food and Water written by Marko Keskinen and published by MDPI. This book was released on 2020-03-10 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book looks at the ways that energy, food, and water help to create connections between sustainability and security. The concept of security is in our current societies increasingly connected with sustainability, which seeks to ensure that we as humans are able to live and prosper on this planet now and in the future. The concepts of energy security, food security, and water security—used separately or together—manifest the burgeoning linkages between security and sustainability. This book brings together ten scientific articles that look at different aspects of security, sustainability, and resilience with an emphasis on energy, food, and/or water in the context of Finland and Europe. Together, the articles portray a rich picture on the diverse linkages between both energy, food, and water, and between security and sustainability. In sum, the articles and related preface conclude that ensuring sustainable security—or secure sustainability—requires systemic, structured processes that link the policies and actors in these two important but still distant fields.

Book Policy Shock

    Book Details:
  • Author : Edward J. Balleisen
  • Publisher : Cambridge University Press
  • Release : 2017-11-02
  • ISBN : 1107140218
  • Pages : 593 pages

Download or read book Policy Shock written by Edward J. Balleisen and published by Cambridge University Press. This book was released on 2017-11-02 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, compelling case studies show how past crises have reshaped regulation, and how policy-makers can learn from crises in the future.

Book Global Energy Assessment

Download or read book Global Energy Assessment written by Thomas B. Johansson and published by Cambridge University Press. This book was released on 2012-08-27 with total page 1885 pages. Available in PDF, EPUB and Kindle. Book excerpt: Independent, scientifically based, integrated, policy-relevant analysis of current and emerging energy issues for specialists and policymakers in academia, industry, government.

Book Ecological Resilience

    Book Details:
  • Author : Kimberly Etingoff
  • Publisher : CRC Press
  • Release : 2016-03-30
  • ISBN : 1771883111
  • Pages : 358 pages

Download or read book Ecological Resilience written by Kimberly Etingoff and published by CRC Press. This book was released on 2016-03-30 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title includes a number of Open Access chapters. This book presents the latest research on resilience strategies around the world. Research such as this is necessary to create new ideas and to evaluate established ones in an effort to make communities more adaptable and to increase people's survival and quality of life while living with the re