Experimental and computational investigations of heat transfer and stability of boiling liquid metal in model of an array of the fast-neutron reactor fuel elements

摘要

The paper presents and analyzes experimental and calculated data on the boiling of a sodium-potassium heat carrier in an array of simulators of fuel elements in a loop with natural circulation which models the conditions of operation of a fast reactor in the regime of accidental cooling. At different mass flow rates of a heat carrier, three regimes of boiling were obtained: a stable (bubble) regime at the initial stage of boiling, then a pulsing (slug) regime which, on increase in the power supply, passed into the second stable (mist) regime of boiling.