公开(公告)号：US20240153655A1

公开(公告)日：2024-05-09

申请号：US18278458

申请日：2021-11-01

Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE

Inventor： Soo Jai SHIN ,  Cheongbong CHANG ,  Seungyeob RYU ,  Han-Ok KANG ,  Young-In KIM ,  Ji Han CHUN ,  Sung Won LIM ,  Joo Hyung MOON ,  Hun Sik HAN ,  Seok KIM ,  Hyunjun CHO

IPC: G21C15/18 ,  G21C15/12

CPC classification number: G21C15/18 ,  G21C15/12

Abstract: According to an embodiment of the present invention, an emergency core cooling system (ECCS) valve provided between a reactor vessel of a system-integrated modular advanced reactor (SMART) and a small containment vessel formed to surround the reactor vessel so that a coolant is filled in a space between the reactor vessel and the small containment vessel in the event of a loss of coolant accident (LOCA) includes an outer shell connected to the reactor vessel and formed to protrude toward the small containment vessel and having a connector formed therein so as to communicatively connect an inside of the reactor vessel to an inside of the small containment vessel, 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, and a spring provided on an outer circumferential surface of the piston to provide a restoring force for moving the piston to a side of the reactor vessel, wherein the piston operates to open the connector when a difference between an internal pressure of the reactor vessel and an internal pressure of the small containment vessel is less than the restoring force of the spring.