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A mature and well-guided multi-stage approach to the validation of nuclear power plant control room designs has the potential to reduce the risks involved in the design process. Such an approach can also increase the effectiveness of, and efficiencies in, the validation process, as well as overall confidence in the results. This relatively new concept of multi-stage validation has yet to be defined in the technical literature, and thus the report describes the approach and the rationale for validating systems through a series of successive, co-ordinated validation activities.
The scope of application of multi-scale validation addressed in the context of this report includes aspects related to both the human factors engineering of new nuclear power plant main control room designs and modifications to existing control room designs. The objective is to provide a common reference for future dialogue, research and development concerning the multi-stage validation approach, and ultimately to support the safe operation of nuclear power plants worldwide.
With almost 70% of the operating nuclear power reactors over 30 years of age, countries around the world are assessing whether to allow reactor operation past the 50 60 year mark and potentially up to 80 years. Ensuring a proper legal framework for the long term operation (LTO) of nuclear power reactors is a key component of such considerations.
The aim of this report is to provide insights into the various laws, regulations and policies that contribute to different countries' approaches to LTO. By collecting information from more than 20 NEA member and non member countries, this report highlights both commonalities among approaches as well as possible reasons for variations. Ultimately, the information gathered can serve as a vital resource for future exchanges respecting the legal aspects of LTO, with a view to further development and strengthening of the collective understanding of these issues.
自１９９２年以来,职业照射信息系统(ISOE)为来自全世界核
动力行业和国家监管当局的辐射防护专家们提供了一个讨论、促
进和协调有关核动力厂工作人员辐射防护的国际合作事业的探
讨的平台.ISOE的目标是通过互相交流职业辐射防护最优化方
法的相关信息、数据和经验,改善核动力厂的职业照射管理.
这个关于工作管理的最新报告为工作管理原则的应用提供
了实际的指导,有助于职业辐射防护的最优化.该报告指出,当
工作管理不再是一个新的概念时,仍需继续努力,确保在当前和
未来的挑战面前,保持它的良好表现、成果和趋势.因此,这本报
告的重点在于提出工作管理的关键方面,供管理人员和工作人员
考虑,从而节省时间、减少剂量和节约资金,并通过不断更新
ISOE共享的实践例子来提供支持.
The computer code system PENELOPE (version 2018) performs Monte Carlo simulation of coupled electron-photon transport in arbitrary materials for a wide energy range, from a few hundred eV to about 1 GeV. Photon transport is simulated by means of the standard, detailed simulation scheme. Electron and positron histories are generated on the basis of a mixed procedure, which combines detailed simulation of hard events with condensed simulation of soft interactions. A geometry package called PENGEOM permits the generation of random electron-photon showers in material systems consisting of homogeneous bodies limited by quadric surfaces, i.e., planes, spheres, cylinders, cones, etc. This report is intended not only to serve as a manual of the PENELOPE code system, but also to provide the user with the necessary information to understand the details of the Monte Carlo algorithm.
Current knowledge of the nuclear physics of fuels and materials provides an understanding and simulation of the operations of nuclear reactors and other systems, both under ordinary and exceptional circumstances. As part of a broad spectrum of collaborative activities underpinning research in basic nuclear sciences, the Nuclear Energy Agency (NEA) is supporting collaboration between experimentalists, theoreticians and modelling experts to advance the state of the art in nuclear data. This report offers an overview of collective results from 31 institutions in 15 NEA member countries, along with results from technical experts in the People's Republic of China, in the context of the NEA Collaborative International Evaluated Library Organisation (CIELO) Pilot Project. It reviews recent developments resulting from new measurements and semi-empirical models, as well as the validation of the CIELO nuclear data evaluations against suites of systems representing a wide range of current and future nuclear facilities. The CIELO project has delivered new, evaluated data for the isotopes of uranium, plutonium, iron, oxygen and hydrogen, which have been adopted in all nuclear data libraries released since the CIELO project was completed.
Radioactive waste repositories are designed to be intrinsically safe in that they are not dependent on the presence or intervention of humans. In response to this challenge, the Nuclear Energy Agency initiated the Preservation of Records, Knowledge and Memory (RK&M) Across Generations Initiative, calling on the international community to help create specific means to preserve RK&M.
The concept of a key information file (KIF) emerged in response to the challenge presented by the large volumes of RK&M material generated by national disposal programmes. This concept has been developed into an important component of a RK&M preservation strategy. The KIF is designed to be a single, short document, produced in a standard format, with the aim of allowing society to understand the nature and intent of a repository, and thus to reduce the likelihood of unnecessary human intrusion. It should be made openly available and ultimately be widely distributed.
This report describes the KIF concept in detail, in a manner that should enable those concerned with any particular repository to create their own versions. Three draft key information files, currently under development to support RK&M preservation in France, Sweden and the United States, are provided as examples.
The nuclear sector has in recent years been placing increasing attention on the need to better understand variations between cost estimates for the decommissioning of nuclear power plants, as well as the relationship between estimated and actual costs, and the apparent escalation of these costs. Building on previous work by the Nuclear Energy Agency, Cost Benchmarking for Nuclear Power Plant Decommissioning examines approaches and methods for the benchmarking of nuclear power plant decommissioning costs. Particular focus is given to identifying key factors, drivers and constraints to implementing cost benchmarking. These factors are addressed from a broad range of perspectives in order to develop a roadmap for implementation that will garner sufficiently broad support from a wide base of interested stakeholders. The report also identifies a number of perceived barriers that may impede the implementation of benchmarking for decommissioning. Co-ordinated efforts and further analysis will be needed to help remove these barriers.
Under the Paris Agreement, OECD countries agreed to aim for a reduction of their greenhouse gas emissions sufficient to hold the increase in the global average temperature to well below 2°C above pre industrial levels. This commitment requires a massive effort to decarbonise energy and electricity generation, a radical restructuring of the electric power sector and the rapid deployment of large amounts of low-carbon generation technologies, in particular nuclear energy and renewable energies such as wind and solar PV.
This study assesses the costs of alternative low-carbon electricity systems capable of achieving strict carbon emission reductions consistent with the aims of the Paris Agreement. It analyses several deep decarbonisation scenarios to reach the same stringent carbon emission target but characterised by different shares of variable renewable technologies, hydroelectric power and nuclear energy.
National programmes for radioactive waste management require very large amounts of data and information across multiple and disparate disciplines. These programmes tend to run over a period of many decades resulting in a serious risk of data and information loss, which in turn can threaten the production and maintenance of robust safety cases.
Metadata and associated tools and techniques play a crucial role in modern data and information management. The Radioactive Waste Repository Metadata Management (RepMet) initiative has prepared the first international study on the application of metadata to the field of radioactive waste management. This report introduces the concept of metadata, explains how metadata can help to facilitate data management, and gives advice on the issues arising when developing metadata within radioactive waste management programmes. It is aimed at readers looking to obtain a highlevel overview of metadata, and associated tools and techniques, and the strategic importance they can play in Radioactive Waste Management Organisations (RWMOs).
Les Données sur l’énergie nucléaire, compilation annuelle de statistiques et de rapports nationaux préparée par l’Agence de l’OCDE pour l’énergie nucléaire, présentent la situation de l’énergie nucléaire dans les pays membres de l’AEN et dans la zone de l’OCDE. Les informations communiquées par les gouvernements comprennent des statistiques sur la production d’électricité totale et nucléaire, les capacités et les besoins du cycle du combustible et, lorsqu’elles sont disponibles, des projections jusqu’en 2035. Les rapports nationaux présentent brièvement les politiques énergétiques, la situation des programmes électronucléaires et ceux du cycle du combustible. En 2017, l’énergie nucléaire a continué de fournir des quantités importantes d’électricité en base faiblement carbonée, et ce dans un contexte de forte concurrence avec les combustibles fossiles bon marché et les énergies renouvelables. Les pays décidés à inclure ou conserver le nucléaire dans leur bouquet énergétique ont poursuivi leurs projets de déploiement ou d’augmentation de leur puissance nucléaire installée. Ainsi, des projets de construction progressent en Finlande, en Hongrie, au Royaume-Uni et en Turquie. De plus amples informations sur ces évolutions et d’autres développements sont fournies dans les nombreux tableaux, graphiques et rapports nationaux que contient cet ouvrage.
Cette publication contient des « StatLinks ». Fonctionnant comme un lien internet, un StatLink fournit l’accès à la feuille de calcul correspondante.
Uranium is the raw material used to produce fuel for long-lived nuclear power facilities, necessary for the generation of significant amounts of baseload low-carbon electricity for decades to come. Although a valuable commodity, declining market prices for uranium in recent years, driven by uncertainties concerning the evolution in the use of nuclear power, have led to significant production cutbacks and the postponement of mine development plans in a number of countries and to some questions being raised about future uranium supply.
This 27th edition of the “Red Book”, a recognised world reference on uranium jointly prepared by the Nuclear Energy Agency (NEA) and the International Atomic Energy Agency (IAEA), provides analyses and information from 41 producing and consuming countries in order to address these and other questions. The present edition provides the most recent review of world uranium market fundamentals and presents data on global uranium exploration, resources, production and reactor-related requirements. It offers updated information on established uranium production centres and mine development plans, as well as projections of nuclear generating capacity and reactor-related requirements through 2035, in order to address long-term uranium supply and demand issues.