A simplified core model of the Canadian supercritical water-cooled reactors

The Canadian concept of SCWR is a light-water cooled, heavy-water moderated, pressure-tube reactor. The full core of Canadian-SCWR used to be modeled using 20 different axial positions each has its own thermal-hydraulic parameters (like fuel temperature, coolant density, etc.). In this paper the validity of using a lower number of nodes in the full-core model has been assessed. It is been found that using only one axial node is sufficient to model the SCWR with an error of only 2% in the exit burnup.