NUCLEAR REACTOR HEAVY ACCIDENT DIFFERENTIAL LOCALISATION SYSTEM WITH BREAKING REACTOR FLOOR AND LARGE SURFACE AREA TRAP Russian patent published in 2017 - IPC G21C9/16 G21C15/18 

FIELD: construction.

SUBSTANCE: invention relates to nuclear reactor severe accident localisation means. Nuclear reactor foundation bed (6) structure strength, mounted on nuclear reactor foundation bearing grate (7), does not exceed strength of nuclear reactor upper and lateral structures. With accident pressure nuclear reactor foundation bed (6) is broken into small parts by instantaneous breakthrough of small window openings with side of up to 20 cm over entire reactor foundation inner area. Reactor foundation bed (6) is simultaneously pushed out through bearing grate (8) along reactor foundation (7) entire internal perimeter. Through reactor foundation bearing grid accident melt is dropped into trap (2) receiving device. Melt intakes (4) are uniformly distribute accident melt along horizontal shafts (3). Horizontal shafts (3) are sector-wise arranged in vertical direction around trap (2) receiving device, along entire perimeter in range NPP unit main building (5), tiered, on required depth, in sufficient amount, providing accident melt guaranteed natural cooling and long-term storage, retardation of its heating, minimization of hydrogen formation, preventing formation of repeated criticality.

EFFECT: technical result is reduction of probability of destruction of outer nuclear reactor sealed loop (1) in case of accident pressure exceeding, nuclear explosion inside reactor.

1 cl, 2 dwg