Assembly for protecting a containment vessel from corium.

摘要

An assembly (32) for protecting a containment vessel includes a perforated base grid (34) disposed below a pressure vessel (14) containing a nuclear reactor core (22) and spaced vertically above a containment vessel floor (16) to define a sump (36) therebetween. A plurality of layers of protective blocks (42) are disposed on the grid (34) for protecting the containment vessel floor (16) from the corium (30). Flooding the sump (36) with water may be foreseen for cooling the blocks (42) and the corium (30).