Scaling and Designing Activities of Integral Test Facility for HPR1000 Reactor

The integral test facility is very useful to study the behavior of the pressurized water reactor (PWR) at accidents. As more and more passive safety techniques were adopted in the reactor system, the integral effect test facilities acted very important role to verify these techniques and the prediction of software. An integral effect test facility for the HPR1000 reactor was designed and constructed based on the scaling analysis. The scaling criteria were derived on the model of natural circulation and blowdown of the constant bulk volume in the primary system. The phenomenon were identified and ranked to ensure the scaling can reproduce them in the test facility as the same as the prototype does. The height ratio is 1:4 and the diameter ratio is 1:6 for the test facility. Totally 177 simulators were used to simulate the thermal hydraulics of the fuel assemblies in the practical reactor core. This makes the core keep the same array as the prototype. Each simulator has one electrical heater which power is controlled by the computer. The power of the core has axial cosine profile and three radial zones to reproduce the physical non-uniform distribution in the reactor core.