The First Law of Thermodynamics.- Ideal gas and steam.- Second Law of Thermodynamics.- Gas Turbine Cycles and Steam Cycles.- Fundamental Equations of Flow.- Bernoulli's Equation (Mechanics of Ideal Fluids).- Law of Momentum.- Motion of Viscous Fluid.- Laminar Flow and Turbulent Flow (The Similarity Rule).- Pressure Propagation and Critical Flow(Compressible Fluid Flow).- Two-phase Flow.- Flow Oscillations.- Reactor Heat Production.- Heat Conduction.- Convective Heat Transfer.- Boiling Heat Transfer and Critical Heat Flux.- Condensation Heat Transfer.- Radiative Heat Transfer.- Thermal Hydraulics inside the Reactor.- Reactor Thermal Design.