Determination of the Pipe Diameter and Length of a Sodium Experimental Installation for Single Phase Natural Convection Simulations

As a part of the verification of PDRC(Passive Decay heat Removal Circuit) concept of DSFR(Demonstration Sodium-cooled Fast Reactor), KAERI will design and construct a large-scale sodium integral effect test facility called STELLA. This paper describes the selection method of the pipe of the experimental model installation, which should be designed so as to simulate various thermal-hydraulic features including the transient with natural convection heat transfer in the prototype. The scaling ratio of the model is one-fifth of the length scale, and the ratio of the temperature rise(ΔToR ) through the heat exchanger is the same with the same coolant as of the prototype