This book highlights a comprehensive introduction to key nuclear power equipment and discusses their development history, current status and prospects. The steam generator, the pressurizer and the condenser are key equipment on which the safety, reliable and economical operation of a nuclear power plant depends. This book provides a detailed introduction to their working principle, structure design, thermo-hydraulics calculation, operation characteristics, etc. The book serves as a valuable reference text for all students and academic researchers in the fields of nuclear engineering.