This publication describes the characteristics of the electrical grid system that are required for the connection and successful operation of a nuclear power plant, as well as the characteristics of a nuclear power plant that are significant for the design and operation of the electrical grid system. It addresses the issues to be considered when a nuclear power plant is being planned and describes the information exchange necessary between the developer of a nuclear power plant and the organization responsible for the electrical grid. The particular issue of a large nuclear unit connected with a small system is also discussed. A new topic introduced in this publication is the need for cyber security of the grid system near the nuclear power plant. Several case studies of Member States experience in developing new nuclear units and about grid events during operation are included.

Life as we know it in modern society relies on the smooth functioning of the electric Grid - the Critical Infrastructure system that generates and delivers electricity to our homes, businesses, and factories. Virtually all other Critical Infrastructure systems depend on the Grid for the electricity they require to execute other essential societal functions such as telecommunications, water supply and waste water services, fuel delivery, etc. This study examines the concepts of Critical Infrastructure and electric Grid resilience, and the role nuclear power plants do and might play in enhancing U.S. Grid resilience. Grid resilience is defined as the system's ability to minimize interruptions of electricity flow to customers given a specific load prioritization hierarchy. The question of whether current U.S. nuclear power plants are significant Grid resilience assets is examined in light of this definition. Despite their many virtues and their "fuel security," the conclusion is reached that current U.S. nuclear power plants are not significant Grid resilience assets for scenarios involving major Grid disruptions. The concept of a "resilient nuclear power plant" or "rNPP" - a nuclear power plant that is intentionally designed, sited, interfaced, and operated in a manner to enhance Grid resilience - is presented. Two rNPP Key Attributes and Six rNPP Functional Requirements are defined. Several rNPP design features (system architectures and technologies) that could enable a plant to achieve the Six rNPP Functional Requirements are described. Four specific applications of rNPPs are proposed: (1) rNPPs as flexible electricity generation assets, (2) rNPPs as anchors of hybrid nuclear energy systems, (3) rNPPs as Grid Black Start Resources, and (4) rNPPs as anchors of Resilient Critical Infrastructure Islands. The last two applications are new concepts for enhancing U.S. strategic resilience. Finally, a few key unresolved issues are discussed and recommendations for future research are offered. Study results support the overall conclusion that successful development and deployment of rNPPs could significantly enhance U.S. Grid, Critical Infrastructure, and societal resilience, while transforming the value proposition of nuclear energy in the 21st century.

Covers all aspects of electrical systems for nuclear power plants written by an authority in the field Based on author Omar Mazzoni's notes for a graduate level course he taught in Electrical Engineering, this book discusses all aspects of electrical systems for nuclear power plants, making reference to IEEE nuclear standards and regulatory documents. It covers such important topics as the requirements for equipment qualification, acceptance testing, periodic surveillance, and operational issues. It also provides excellent guidance for students in understanding the basis of nuclear plant electrical systems, the industry standards that are applicable, and the Nuclear Regulatory Commission's rules for designing and operating nuclear plants. Electrical Systems for Nuclear Power Plants offers in-depth chapters covering: elements of a power system; special regulations and requirements; unique requirements of a Class 1E power system; nuclear plants containment electrical penetration assemblies; on-site emergency AC sources; on-site emergency DC sources; protective relaying; interface of the nuclear plant with the grid; station blackout (SBO) issues and regulations; review of electric power calculations; equipment aging and decommissioning; and electrical and control systems inspections. This valuable resource: Evaluates industry standards and their relationship to federal regulations Discusses Class 1E equipment, emergency generation, the single failure criterion, plant life, and plant inspection Includes exercise problems for each chapter Electrical Systems for Nuclear Power Plants is an ideal text for instructors and students in electrical power courses, as well as for engineers active in operating nuclear power plants.

This publication contains guidance and recommendations on the requirements for ensuring the reliability of all types of emergency powers systems (EPSs) for both new and operating nuclear power plants. It is intended for the use of those involved in the design, operation, assessment and licensing of EPSs, including designers, safety assessors, regulators and operators. It revises the previous safety guide (Safety standards series no. 50-SG-D7 (Rev. 1) (ISBN 9201232918) issued in 1991.

Americans' safety, productivity, comfort, and convenience depend on the reliable supply of electric power. The electric power system is a complex "cyber-physical" system composed of a network of millions of components spread out across the continent. These components are owned, operated, and regulated by thousands of different entities. Power system operators work hard to assure safe and reliable service, but large outages occasionally happen. Given the nature of the system, there is simply no way that outages can be completely avoided, no matter how much time and money is devoted to such an effort. The system's reliability and resilience can be improved but never made perfect. Thus, system owners, operators, and regulators must prioritize their investments based on potential benefits. Enhancing the Resilience of the Nation's Electricity System focuses on identifying, developing, and implementing strategies to increase the power system's resilience in the face of events that can cause large-area, long-duration outages: blackouts that extend over multiple service areas and last several days or longer. Resilience is not just about lessening the likelihood that these outages will occur. It is also about limiting the scope and impact of outages when they do occur, restoring power rapidly afterwards, and learning from these experiences to better deal with events in the future.

Electricity is the lifeblood of modern society, and for the vast majority of people that electricity is obtained from large, interconnected power grids. However, the grid that was developed in the 20th century, and the incremental improvements made since then, including its underlying analytic foundations, is no longer adequate to completely meet the needs of the 21st century. The next-generation electric grid must be more flexible and resilient. While fossil fuels will have their place for decades to come, the grid of the future will need to accommodate a wider mix of more intermittent generating sources such as wind and distributed solar photovoltaics. Achieving this grid of the future will require effort on several fronts. There is a need for continued shorter-term engineering research and development, building on the existing analytic foundations for the grid. But there is also a need for more fundamental research to expand these analytic foundations. Analytic Research Foundations for the Next-Generation Electric Grid provide guidance on the longer-term critical areas for research in mathematical and computational sciences that is needed for the next-generation grid. It offers recommendations that are designed to help direct future research as the grid evolves and to give the nation's research and development infrastructure the tools it needs to effectively develop, test, and use this research.