Water-Cooled Water-Moderated Nuclear Reactor Core Melt Cooling and Confinement System

摘要

The present invention relates to a system for providing the safety of the nuclear industry, that is, a nuclear power plant (NPP), which can be used in the event of a critical accident resulting in failure of a reactor vessel and an NPP containment vessel. The melt cooling and confinement system includes a conical guide plate installed under the bottom of the reactor vessel; A cantilever beam installed under the guide plate to support it; A core catcher installed under the cantilever and having a cooling cladding tube in the form of a multi-layered container for protecting the external heat exchange wall from dynamic, thermal and chemical impacts; It contains a filler material for melt dilution inside a multilayer container. The multi-layer container has external and internal metal walls with fillers of high thermal conductivity compared to the wall material between them, and the thickness h _fil of the filler material meets the following criteria: 1.2h _ext fil <2.4h _ext , Where h _ext is the thickness of the outer wall of the container. The technical result of the present invention lies in an increase in the efficiency of heat removal from the melt and an improvement in structural reliability.