This multilingual dictionary explains, in simple andclear language, themost frequently-used terms and expressions in the field of nuclear reactor physics and engineering, and provides translations of these terms from English into French, German, Swedish and Polish. This unique resource offersmany advantages over the use of online translation tools, which are often incorrect when dealing with scientific and technical words. Instead, this dictionary has used a wide variety of peer-reviewed books and journal papers to ensure the highest accuracy and establish itself as a reliable and crediblereference for the reader. It coversa broad range of exciting topics and the latest developments in the field,including reactor technology, reactor components and systems, reactor operation and control, reactor types, reactor physics, thermal engineering, reactor safety, radiation protection, nuclear fuel, nuclear chemistry, the safeguarding of nuclear materials, andmuch more. Thisdictionary is kept on a technical level corresponding to Master and PhD studies of nuclear physics and engineering. Itwill provide the reader witha broad understanding of the necessary information that a researcher or nuclear physicst or engineer would need to possess, thereforeit will be an invaluable resource for studentswithin thisand related disciplines. Features: Contains over 1500 key terms from the field The first book to provide translations in five languages: English, French, German, Swedish and Polish Accessible to Master and PhD students in addition to early career researchers in nuclear reactor physics and engineering