Nuclear power plant is described as a power plant in which nuclear energy is converted into heat for use in producing steam. The main challenge faced globally is gathering enough energy for the increasing population and controlling the carbon emission caused by the usage of fossil fuels. To overcome this, nuclear energy can be used as an alternative power source. This book includes research work and technical experience from different power plants and research institutions around the world. It discusses various topics like nuclear systems protection, design and modeling of critical parameters in nuclear power plants, thermal-hydraulic analysis, nuclear waste management and safety assessment. The book consists of significant information which will be of interest to scientists and those in technical areas of nuclear power plants.