method for protecting the integrity of the bottom of the container of a reactor in nuclear power plants and device for implementing the method

摘要

for the protection of the integrity of the bottom of the container of a reactor in nuclear power plantsin the case of accidents involving the merger of stringent reactor core and the leakage of melted material.a method and a device are proposed, which provide a functioning in three stages: (a) the interception and redistribution of regular and 3-d fuoriuscente melted material from reattoon the surface of beams prepared to pile in dry environment, below the pressure vessel reactorin the cavity of the container is the reactor; (b) the risolidificazione and the initial cooling of molten material deposited in layers of small thickness on the beams.after this risolidificazione, (c) the final cooling by a cooling fluid, flow from a tank, to flood the cavity containing the stack of beams.in this way, in addition to maintaining the integrity of the bottom of the container, avoiding explosion of steam.