Importance

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Abstract

A nuclear reactor with liquid coolant and solid fuel assemblies incorporates a heat removal system using a liquid metal bath for removing nominal heat and phase-change material(s) (PCM) for removing the decay heat in an accident situation. The nuclear reactor uses a liquid metal or molten salt primary coolant that simultaneously ensures passive heat removal, by natural convection in the primary circuit, in normal and accident operating modes during shutdown through the primary vessel of the reactor, that is, beyond the second containment barrier. In the event of an incident or accident, a compact passive decay heat removal system is capable of performing the safety function for a predetermined period, typically three days, without any intervention by an operator, due to the presence of one or more PCM(s) that store(s) the decay heat produced in the core and removed by the primary vessel.

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First Claim