公开(公告)号：US20240221964A1

公开(公告)日：2024-07-04

申请号：US17998988

申请日：2021-09-25

Applicant: Tsuyoshi MATSUOKA

Inventor： Tsuyoshi MATSUOKA

IPC: G21C15/18 ,  G21C9/008

CPC classification number: G21C15/18 ,  G21C9/008

Abstract: [Objective] An object is to provide a reactor which can cope with a core meltdown accident; i.e., can keep the soundness of a reactor pressure vessel and a reactor containment vessel and prevent release of radioactive substances to the outside even when a core meltdown accident occurs.
[Means for solution] A reactor 1 includes water-injection-to-core interruption means, provided for a possible core meltdown accident, for stopping injection of water into a core after occurrence of a zirconium-water reaction or film boiling in the core is detected on the basis of core pressure or the like. In order to remove core decay heat by natural cooling or water-cooling of the outer surface of a reactor pressure vessel 3 or the outer surface of a heat insulation 4 after injection of water into the core is stopped at the time of a core meltdown accident, the reactor 1 includes melting point restriction management means for managing a melting point restriction in material selection at the time of manufacture of the heat insulation 4 so that the heat insulation 4 melts and breaks without fail at the time of the core meltdown accident, or water injection means for injecting water into the space between the heat insulation 4 and a shield concrete 13.