Development of prediction method of turbulent heat transfer for thermal-hydraulic design of supercritical water reactor

Nakatsuka, Toru  ; Misawa, Takeharu; Yoshida, Hiroyuki  ; Takase, Kazuyuki

In the thermal hydraulic design of supercritical water-cooled reactor, it is required to establish a thermal hydraulic design method which can precisely predict heat transfer deterioration of supercritical water as the core coolant. Assessments of applicability of turbulence models used in design methods have not been sufficiently performed, since the mechanism of heat transfer deterioration has not been clearly figured out yet. Japan Atomic Energy Agency has started developing prediction method of heat transfer deterioration with large eddy simulation to improve the thermal hydraulic design accuracy. In the present study, simulation results of heat transfer test with Freon are reported.