PASSIVE NUCLEAR REACTOR PROTECTIVE SYSTEM Russian patent published in 2014 - IPC G21C9/16 

FIELD: physics, atomic power.

SUBSTANCE: invention relates to nuclear power engineering and can be used to improve reliability of a reactor block, increase intensity and controllability of corium cooling during accident containment at a nuclear power plant. The passive nuclear reactor protective system comprises a nuclear reactor housing; on the inner surface of the lower part of the reactor housing there are thin-wall metal blocks whose inner cavity is filled with a ceramic refractory material. In the middle part of opposite sides of the blocks there are deep recesses that are half the thickness of the block. On the inner surface of the lower part of the reactor housing there are locking members having on one side, which is mated with the deep recess, a hard groove and on the other side, which is mated with the deep recess of another mated block, a groove made on an elastic pusher plate.

EFFECT: reduced heat flow from the corium to the reactor housing and when removing heat from the outer surface of the housing, controlled reduction of the temperature of the housing to values guaranteed to preserve mechanical strength thereof, which prevents the corium from penetrating the space under the reactor.

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