Abstract
In-Vessel Retention (IVR) strategy can ensure nuclear safety and the integrity of Reactor Pressure Vessel (RPV) during the severe nuclear accident. The Molten pool Oxide-layer heat tRaNsfer experiment (MORN) has been built to investigate the heat transfer characteristics of oxide layer in a three-dimensional molten pool. In this experiment, water, nitrate, and oxide were used as the simulants to carry out the experimental research under high temperature and high heat flux. The results demonstrated that the relationship of Nu-Ra was coincident well with the existing correlation with the experiment of water and nitrate simulants. Cooling boundary conditions of the molten pool affected the ratio of upward heat flux to downward heat flux. Also, the heat flux of the low polar angle was lower than that of the high polar angle and the correlations of heat flux distribution were fitted by the experiment of nitrate and oxide simulants.
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