METHOD FOR PROTECTING NUCLEAR REACTOR CASE IN SEVERE ACCIDENT FROM THERMAL LOAD OF CORE MELT AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC G21C9/00 

FIELD: physics.

SUBSTANCE: in the method for protecting the case from the thermal load of the core melt located in the lower part of the reactor vessel and having a stratified structure with a top layer of the metal melt and a lower fuel-generating oxide layer, elements with thermal conductivity coefficients above the thermal conductivity of the oxide components of the melt are placed with densities greater the densities of the oxide components of the melt, prior to the formation of the melt bath, into the reactor vessel. Provision is made to ensure the wall integrity of the nuclear reactor vessel and to retain high-temperature materials of the molten core inside the reactor vessel.

EFFECT: decreasing the intensity of the thermal load on the wall of the reactor vessel in the area of its contact with the upper metal layer of the melt when a stratified melt bath is formed in the lower part of the reactor vessel in the event of an accident.

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