the primary piping flow velocity (m/s),.the primary piping volumetric flow rate (m 3/s),.From the bottom of the pressure vessel, the flow is reversed up through the core, where the coolant temperature increases as it passes through the fuel rods and the assemblies formed by them.

Inside the reactor pressure vessel (RPV), the coolant first flows down outside the reactor core ( through the downcomer). The primary circuit of typical PWR is divided into 4 independent loops (piping diameter ~ 700mm), each loop comprises a steam generator and one main coolant pump.

The water (coolant) is heated in the reactor core to approximately 325☌ ( ⍴ ~ 654 kg/m 3) as the water flows through the core. Inlet temperature of the water is about 290☌ ( ⍴ ~ 720 kg/m 3). At this pressure water boils at approximately 350☌ (662☏). Pressurized water reactors are cooled and moderated by high-pressure liquid water ( e.g. _ Density as a function of temperature of water It is an illustrative example, following data do not represent any reactor design. In this example, we will calculate the flow rate through a reactor core from continuity equation.