JP3146050B2 - Reactor containment vessel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced concrete reactor containment vessel of a boiling water reactor, and more particularly to a reactor containment vessel suitable for erection of a cable for a service inspection device or the like.

[0002]

2. Description of the Related Art In a so-called improved boiling water reactor,
For example, as shown in FIG. 2, the reactor containment vessel 1 is formed of a reinforced concrete into a cylindrical shape.

A service inspection device (ISI device) 3 is mounted near a reactor pressure vessel 2 installed at the center of the reactor containment vessel 1, and a service inspection electrical cable (ISI device) drawn from the ISI device 3 is used. An ISI cable 4 is drawn out across the access space 6 above the upper drywell 5, penetrates the vertical wall 7, is bent upward outside the vertical wall 7, and has an outer diameter of the top slab 8. It is guided to the upper service inspection room (ISI room) 9 through the side.

[0004]

In the reactor containment vessel having the above-described structure, the ISI cable 4 extends to the penetrating portion 10 in the vertical wall 7 across the access space 6, so that accessibility is improved. May decrease. Also, I
If the SI cable 4 is routed so as to avoid the access passage portion, the length of the wiring in the reactor containment vessel 1 becomes long, which causes problems such as a reduction in workability.

[0005] The same can be said for a cable cladding tube and other piping routes.

[0006] The present invention has been made in view of such circumstances, and it is possible to reduce the length of the cable or piping routed inside the reactor containment vessel and to prevent them from obstructing the access space. It is an object of the present invention to provide a reactor containment vessel that can be prevented from improving the workability and accessibility in the containment vessel.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a nuclear reactor containment vessel made of reinforced concrete and having a cylindrical shape. Through a top dry slab, a through hole is formed in the top slab in a portion of the top slab located closer to the reactor pressure vessel than the access space in the upper dry well, and the cable or piping is connected to the top slab through the through hole. It is characterized by being led to the upper chamber.

[0008]

According to the present invention, the cable drawn from the reactor pressure vessel side is bent upward in front of the access space and penetrates the top slab. Accessability is not hindered even if troublesome routing such as the conventional structure that crosses a space is not performed. Therefore, the workability and accessibility in the storage container can be improved.

Moreover, since the cable is guided upward at a position close to the reactor pressure vessel side, compared with the conventional structure,
The length of the cable routed in the containment vessel can also be reduced.

[0010]

An embodiment of the present invention will be described below with reference to FIG.

In this embodiment, the IS in the upper dry well is
This is applied to the construction of a cable connecting the I apparatus and the ISI room.

That is, as shown in FIG. 1, the containment vessel 11 of the present embodiment is formed in a cylindrical shape by reinforced concrete, and the inner walls are arranged in the vertical and horizontal directions. The reactor pressure vessel 1 installed at the center of the containment vessel 11
2, an ISI device 13 is attached.

The ISI cable 14 drawn out of the ISI device 13 is drawn out toward an access space 16 above the upper dry well 15 and is bent upward just before the access space 16.

That is, a through hole 18 is formed in the top slab 17 at a position located closer to the reactor pressure vessel 12 than the access space 16, and the ISI cable 14 is passed through the through hole 18 through the ISI chamber 19. Is led to.

According to such a configuration, the ISI cable 14 drawn from the reactor pressure vessel 12 is bent upward in front of the access space 16 and penetrates through the top slab 17, so that the service inspection cable is used. Regarding the erection of 14, the workability and accessibility in the containment vessel are not hindered even if the troublesome routing like the conventional structure crossing the access space 16 is not performed.

Moreover, since the ISI cable 14 is guided upward at a position close to the reactor pressure vessel 12, the length of the ISI cable 14 can be reduced as compared with the conventional structure.

In the above embodiment, the present invention is applied to the installation of an ISI cable. However, it goes without saying that the present invention can be applied to the installation of various cables other than the ISI cable or the installation of various pipes.

[0018]

As described above, according to the present invention, by providing a penetrating portion in the top slab of the reinforced concrete containment vessel, the cables or pipes in the containment vessel can be shortened and the work in the containment vessel can be shortened. Thus, it is possible to improve the accessibility and the accessibility, and also to have a great effect in reducing the exposure.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a conventional example.

[Explanation of symbols]

 11 Reactor Containment Vessel 12 Reactor Pressure Vessel 13 ISI Device (In-Service Inspection Device) 14 ISI Cable 15 Upper Dry Well 16 Access Space 17 Top Slab 18 Through Hole 19 ISI Room

Claims (1)

(57) [Claims] 1. A reactor containment vessel formed of reinforced concrete in a cylindrical shape, wherein a cable or a pipe drawn from a reactor pressure vessel side is accessed through an upper dry well of a top slab in the upper dry well. A reactor containment vessel characterized in that a vertical through-hole is formed in a portion located on the side of the reactor pressure vessel relative to a space, and the cable or pipe is led to a chamber above the top slab through the through-hole.