Patent Number: 
Section: claims

1. A sealed cable inlet through external and internal containment walls of a nuclear power plant, comprising:a connection pipe installed through the internal wall;a cable input disposed within a cavity of the connection pipe and rigidly fixed to a portion of the connection pipe;a pipe installed through the external wall and coaxially aligned with the connection pipe;a first bellows located on a first end portion of the pipe, wherein the first bellows is proximate to an internal surface of the external wall;a cable output disposed within the pipe, wherein a first portion of the cable outlet is at least partially received within the first bellows;wherein an area defining a gap is formed between an internal surface of the pipe and an external surface of the cable output;a second bellows located on a second end portion of the pipe, wherein the first and second end portions are spaced and opposed from one another, wherein the second bellows is proximate to an external surface of the external wall, wherein a second portion of the cable outlet is at least partially received within the second bellows;wherein the first and second bellows each includes a free end, wherein the free ends of the first and second bellows are tapered to form narrowed portions thereof;wherein the cable output is supported by internal surfaces of the narrowed portions of the tapered free ends of the first and second bellows; andwherein the first and second bellows each include corrugated portions formed thereon, wherein a twisted conical compression spring is installed in an area defining an internal cavity of at least one of the corrugated portions of the first and second bellows. 2. The invention according to claim 1, further comprising:two protective pipes disposed within a space between the external and internal walls, wherein the two protective pipes are coaxially aligned with one another, wherein the two protective pipes each includes a free end;wherein the cable input is at least partially disposed within at least one of the two protective pipes;wherein one of the two protective pipes is cantilever fitted on an internal surface of the internal wall and the other one of the two protective pipes is cantilever fitted concentrically with the second bellows on the internal surface of the external wall;a cylinder-shaped bellows located between the two protective pipes; andwherein the cylinder-shaped bellows interconnects free ends of the two protective pipes. 3. The invention according to claim 1, wherein the gap includes a width that is operable to accommodate a change of cable coaxial position in the pipe due to seismic events or thermal expansion. 4. The invention according to claim 1, wherein the tapered ends of the first and second bellows are located inside the pipe and oriented towards each other. 5. The invention according to claim 1, wherein the cable input is suspended on springs that are disposed within the pipe.