Use of the Natural Circulation Flow Map for Natural Circulation Systems Evaluation.

The article focuses on the use of the natural circulation flow map for the evaluation of the natural circulation systems. It discusses the work done to build and develop an engineering tool related to the natural circulation conducted at the University of Pisa in Italy. It explores the different loop flow regimes in single phase and in two phase, as well as the derivation of a suitable tool to judge the natural circulation performance in a generic system. It highlights the comparison among the natural circulation performance of various nuclear power plants having different designs done to show a practical application of the natural circulation flow map.