Scaling criteria for Tehran research reactor thermalhydraulic systems

Scaling criteria for Tehran Research Reactor, a Material Testing Reactor, under natural as well as forced circulation is derived based on fluid-to-fluid modeling. Using these criteria, the basic characteristics of scale model are determined. The aforementioned criteria are such as power density, temperature rise, mass flux, and size of the model. In general, numbers of scaling laws are less than the basic unknown characteristics variables of the model and consequently, many scale models can be established for the system under consideration. The choice of model designer has a significant effect on final model and its distortion. In Tehran Research Reactor (TRR), the thickness of fuel plate and the width of coolant flow rate are very thin. For increasing these two parameters that may lead to an efficient and a better model; two strategies are employed. Either, using different clad materials from those that are used in the prototype or, changing the type of coolant fluid. (author)