Abstract
A one-dimensional time-dependent rewetting model is developed and assessed to describe the interrelated processes of conduction, convective cooling and exothermic steam–metal reactions at the vapor zirconium-cladding interface during quenching of degraded fuel rods. Upstream of the quench front a constant heat transfer coefficient is assumed whereas a heat flux profile of general spatial shape may be prescribed downstream. The quenching velocity history and the temperature profile are computed analytically via a Green's function approach. Numerical results of the present model compare favorably with published experimental data.
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