PASSIVE VERTICAL AND HORIZONTAL MUFFLES UNITS TO PREVENT LEAKAGE (SPILL) OF THE MELT OUT OF TIGHT AREA IN SEVERE ACCIDENTS AT NUCLEAR POWER PLANTS Russian patent published in 2017 - IPC G21C11/00 

FIELD: machine engineering.

SUBSTANCE: invention relates to a passive vertical choke the site to prevent leakage (spill) melt on the mechanism of early bypass containment area/volume in the hermetic severe accident in a nuclear reactor nuclear power plant. Assembly consists of a vertical cylindrical central tube (1) fixed on a steel plate (2). Around the tube (1) the casing is placed(3), built in a concrete structure (4.b). In the lower part of the tube (1) placed bioprotective monolithic cylinder consisting of two semi-cylindrical segments (5.1) and (5.2), between which extends the central hole/channel (6) through which the cable/wire (8). The space between the casing (3) and the vertical tube (1) is filled with concrete (9). Over Bioprotective cylinder, the stifles plug of the two segments is installed (7.1) and (7.2), closely tied to each other staples (12.1) and (12.2). Channel (6) and passes between the segments (7.1) and (7.2), containing voids, forming a corresponding cavity (10.1) and (10.2), and the lower slope of the two segments (7.1) and (7.2) backs covering the scope of the stub (11 ) formed monolithic and made of pure tungsten carbide.

EFFECT: assembly operation in the event of an accident on the principle of feedback.

2 cl, 4 dwg, 1 ex