Abstract
A kinetic model of nonequilibrium melting of a macrosystem under the action of a volume heat source formed in its bulk has been constructed. In this model, the melting of such a system is defined with account of the thermodynamic fluctuations of its order parameter, playing a great role in the superheating of the system and in the attainment by it of the absolute instability point at which the initially metastable solid phase of the system becomes absolutely unstable relative to the infinitely small fluctuations of its liquid phase. Analytical solutions of the kinetic equations defining the melting of a macrosystem have been obtained for different rates of its heating by an internal volume heat source.
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