System including emergency core cooling system valve for nuclear reactor

Abstract

A system comprising an emergency core cooling system (ECCS) valve, a nuclear reactor vessel, and a containment vessel surrounding the nuclear reactor vessel, is provided. The ECCS valve comprises an outer shell connected to the nuclear reactor vessel and protruding toward the containment vessel and having a connector formed therein; an inner shell provided inside the outer shell at a preset distance from an inner wall of the outer shell; a piston movably constrained and inserted through a piston opening formed in the inner shell at a position facing the connector of the outer shell to open and close the connector; a spring provided on an outer circumferential surface of the piston to provide a restoring force for moving the piston in a direction toward the nuclear reactor vessel; a fluid pump; a swing check valve; a reset valve; and a trip valve.