REACTOR CONTAINMENT VESSEL

摘要

PROBLEM TO BE SOLVED: To provide a reactor containment vessel capable of maintaining a resistance strength and a soundness of a container vessel structure suitable for converging an accident event by improving a cooling capacity of a core fused material and preventing an erosion to a lower section concrete side wall in an accident countermeasure management for cooling the core fused material by pre-irrigation to a containment vessel lower section at an accident time when a core meltdown and a breakage of a pressure vessel occur.SOLUTION: A reactor containment vessel is configured in such a manner that a containment vessel lower part section is formed on a reactor containment vessel floor and surrounded by supporting and fixing a pressure vessel by a support structure at an upper part of the side wall of the reactor containment vessel installed on the reactor containment vessel floor in a lower part of a reactor pressure vessel and made to perform irrigation to the reactor vessel lower part section when an abnormality of the reactor occurs. A heat transfer plate is arranged in an internal periphery of the containment vessel lower section formed at the side wall of the reactor containment vessel via a gap, and a space by the heat transfer plate is formed, and a core fused material generated when an abnormality of the reactor occurs in the internal space by the heat transfer plate is stored in the space.