The book “Using the TIME26 program in the course design of fast reactors and nuclear power plants” is a unique publication created by the team of authors, which represents an important contribution to the field of nuclear energy and reactor design. This work will become an indispensable assistant for students, graduate students, engineers and researchers interested in modern technologies in the field of nuclear physics and energy. The focus of the book is the program TIME26, designed to simulate and analyze the processes occurring in fast reactors and nuclear power plants. The authors examine in detail how this program can be used to optimize the design, safety, and efficiency of nuclear facilities. Readers will be able to learn about the key aspects of working with TIME26, including its functionality, algorithms and methods that allow for in-depth analysis of various reactor operating scenarios. The book not only provides theoretical foundations, but also includes practical examples of the application of the program in real-life projects. This makes it especially valuable for those who want not only to study theory, but also to put knowledge into practice. The authors share their experience, which allows readers to avoid common mistakes and better understand the nuances of designing nuclear plants. The topics raised in the book cover a wide range of issues, from the fundamentals of nuclear physics to the complex engineering solutions needed to create safe and efficient reactors. The book addresses important aspects such as thermodynamics, radiation safety, and the environmental and economic implications of nuclear energy use. These topics make the publication relevant not only for specialists in the field of nuclear energy, but also for a wide audience interested in sustainable development and alternative energy sources. Who can like this book? First of all, it will be useful for students and graduate students of technical universities studying in specialties in the field of energy, nuclear physics and engineering . It will also interest practicing engineers and researchers working in the design and operation of nuclear plants. In addition, the book may be of interest to anyone who wants to deepen their knowledge of modern technologies in the field of nuclear energy and their impact on the environment. The style of the authors is distinguished by clarity and accessibility, which makes it easy to assimilate complex concepts. They use many illustrations, graphs and tables, which makes the material more clear and understandable. The team of authors includes experts with many years of experience in the field of nuclear energy, which gives the book additional value and authority. If you are looking for literature that combines theory and practice, as well as covers current issues of nuclear energy, then “Using the TIME26 program in the course design of fast reactors and nuclear power plants” will be an excellent choice. This book will not only expand your knowledge, but also inspire new ideas and projects in the field of nuclear energy. Do not miss the opportunity to immerse yourself in the world of modern technologies and discover new horizons in the design of nuclear installations!