System including emergency core cooling system valve for nuclear reactor

A system comprising:

• an emergency core cooling system (ECCS) valve;
• a nuclear reactor vessel;
• and
• a containment vessel surrounding the nuclear reactor vessel,
• wherein the ECCS valve is provided between
• the nuclear reactor vessel
• and the containment vessel,
• and the ECCS valve is configured to supply
• a coolant, that is filled in a containment space formed between the nuclear reactor vessel and the containment vessel,
• to the nuclear reactor vessel
• in the event of a loss of coolant accident (LOCA), and
• wherein 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
• so as to communicatively connect an interior of the nuclear reactor vessel to the containment space;
• 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 configured to supply fluid to an inside of the inner shell between the nuclear reactor vessel and a bottom portion of the piston;
• a swing check valve
• provided to pivotally hinge on an inner wall of the inner shell on the side of the nuclear reactor vessel
• and opening and closing an inner shell opening between the nuclear reactor vessel and the inner shell
• according to
• an internal pressure of the nuclear reactor vessel
• and a fluid pressure supplied from the fluid pump into the inner shell;
• a reset valve
• connected to the fluid pump and
• supplying, by opening, a fluid from the fluid pump
• to the inside of the inner shell between the nuclear reactor vessel and the bottom portion of the piston;
• and
• a trip valve
• opened
• during malfunction of the reset valve
• or by an operating signal
• and operating to reduce an internal pressure of the inner shell,
• wherein the piston operates to open the connector
• when a difference between
• an internal pressure of the nuclear reactor vessel
• and an internal pressure of the containment vessel
• is less than the restoring force of the spring,
• wherein the inner shell shares an inner wall with the outer shell.