JP3442903B2 - Support structure for reactor containment internals - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for supporting structures inside a reactor containment vessel for mounting structures such as piping and lighting inside the reactor containment vessel.

[0002]

2. Description of the Related Art A nuclear power plant is provided with a reactor containment vessel for the purpose of containing radioactive materials leaked from the core into the system and not releasing radioactivity to the outside in the event of accidental damage to the reactor primary system. .

An outline of a reinforced concrete reactor containment vessel installed in a boiling water nuclear power plant will be described with reference to FIG. In FIG. 5, a reactor containment vessel indicated by reference numeral 1 is a primary containment facility for storing a reactor pressure vessel 2, and the inside of the reactor containment vessel 1 has a diaphragm floor provided across the horizontal direction having a pressure reducing function. 3, the dry well 4 and the suppression chamber 5 are separated from each other. The reactor pressure vessel 2 is structured to be supported by a cylindrical pedestal 6 which is erected from the bottom of the reactor containment vessel 1.

FIG. 6 is a vertical sectional view of a side wall portion showing an enlarged portion A in FIG. 5, and FIG. 7 is a horizontal sectional view of the side wall portion. That is, in FIG. 6 and FIG. 7, the liner plate 7 having a leaktight function inside of the reactor containment vessel 1 is provided, specifically an enlarged in FIG. 6 B portion on the outer side 8 As shown in, a liner anchor (cut tee 8, flat bar 9) for preventing the buckling of the liner plate is installed.

The skeleton of the reactor containment vessel 1 is made of reinforced concrete in which reinforcing bars 10 are arranged inside and outside in three steps and concrete 11 is cast. The liner plate provided on the skeleton has a structure integrated with the skeleton by a liner anchor. 8 to 10 are enlarged views of the conventional structure of the portion B in FIG. FIG. 9 shows an example in which the thick plate liner portion 15 is used.

Conventionally, the structure 17 such as piping and lighting installed near the side wall of the containment vessel in the reactor containment vessel has a support structure which is supported and fixed on the containment body. That is, for example, in the case of attaching a general pipe, the pipe support is supported by the pad 12 provided inside the liner plate 7, and the pad 13 and the stud bolt 14 are installed outside the liner plate to provide a fixing function. Has become.

Further, as shown in FIG. 9, in the thick plate liner portion 15, the liner plate outer pad 13 shown in FIG. 8 is not provided, but the liner plate inner pad 12 and the stud bolt 14 are used for the structure such as piping and lighting. It has a support structure for attaching things. Further, as shown in FIG. 10, the support structure is configured in consideration of the number of stud bolts 14 depending on the load of structures such as piping and lighting.

[0008]

When mounting structures such as piping and lighting in the reactor containment vessel, as described above, the pads 12, 13 and the stud bolts 14 should be integrated at all supporting points, or Alternatively, the thick plate portion has a structure using only stud bolts. Therefore,
There is a problem in that the number of pads and the number of stud bolts are large, and the amount of pad welding accompanying them is also large, which deteriorates the manufacturability of the liner.

The present invention has been made to solve the above problems, and provides a support structure for a reactor containment internal structure capable of reducing manufacturability of a liner by reducing pads and stud bolts. Especially.

[0010]

[Means for Solving the Problems] To achieve the above object
The invention according to claim 1 has a liner plate on the side wall portion, and a liner anchor composed of a cut tee and a flat bar on the outside of the liner plate. The reinforcing bars are reinforced and concrete is poured. Reactor containment vessel is constructed, the pad is provided inside the liner plate, the structure for supporting the structure of the reinforced concrete reactor containment vessel of a boiling water nuclear power plant to attach a structure to this pad, in the pad, Outside of the liner plate located
Provide a stud bolt on the side and
Lattice bars are placed on the stud bolt and the length of the stud bolt is
It is characterized in that it is within the cover thickness of the cleats . Claim
The invention according to Item 2 has a liner plate on a side wall portion,
Cut tees and flats on the outside of this liner plate
It has a liner anchor consisting of bars and rebar reinforcement
Then, concrete was placed to build the reactor containment vessel.
Pad on the inside of the liner plate.
Reinforcing bar of a boiling water nuclear power plant that attaches a structure to the head
For the support structure of the internal structure of the concrete reactor containment vessel
The portion of the liner plate where the pad is located
It is characterized in that a thick plate portion is provided . Claim 3
Has a liner plate on the side wall,
The outside of the plate is made up of cut tees and flat bars.
It has a liner anchor that is made up of
The reactor containment vessel is constructed by placing the
A pad is provided inside the plate, and a structure is
Made of reinforced concrete for boiling water nuclear power plant to be installed
In the support structure for the structure inside the reactor containment vessel,
Of the liner plate where the liner anchor is located
A stud bolt is provided on the inner side of the liner anchor.
It is characterized by the provision of a belt .

[0011]

The liner anchor installed for preventing the buckling of the liner plate is used to attach and fix the structures such as the pipe and the lighting, and also has the fixing function. Further, by eliminating the stud bolts or shortening the length of the stud bolts and arranging lattice reinforcements within the cover thickness of concrete, the number of pads and the amount of welding associated therewith are reduced.

That is, in the first aspect of the present invention, structures such as piping and lighting in the reactor containment vessel are attached to and supported by the liner plate inner pad provided at the liner anchor position of the liner plate, and the liner anchor is supported by the conventional stud bolt. , As an alternative to the outer pad of the liner plate.

A second aspect of the invention is to dispose grid lines around the stud bolts so that the length of the stud bolts is within the cover thickness of concrete. The third aspect of the invention supports pipes and lights with a light load. In this case, the inner pad of the liner plate is installed on the thick plate of the liner and is supported only by it. In the fourth aspect of the invention, the stud bolt is provided on the liner anchor and the outer pad of the liner plate is removed. And the welding amount and stud bolts are reduced, which improves the manufacturability of the liner.

[0014]

EXAMPLE A first example of a reactor containment vessel according to the present invention will be described with reference to FIG. FIG. 1 shows a main part of the first embodiment, and corresponds to FIG. 8 in which a portion B in FIG. 6 is enlarged. In FIG. 1, the same parts as those in FIG.

The part of the first embodiment different from the conventional example is that a liner plate 7 is attached to the side wall of the reactor containment vessel, and the liner plate 7 is connected by a liner anchor (cut tee 8 and flat bar 9). The structure 17 such as piping and lighting provided in the reactor containment vessel is attached to the liner plate inner pad 12 provided at the liner anchor position of the liner plate 7. The other structure is the same as that of the conventional example, and the description thereof is omitted.

In this embodiment, the liner plate inner pad 12 is provided inside the liner plate 7 at the liner anchor position, and the liner anchor is provided with a fixing function, so that the load of structures such as pipes and lights can be smoothly transmitted. be able to.

That is, according to the present invention, since the pad 13 and the stud bolts 14 on the outside of the liner plate shown in FIG. 8 are conventionally removed, the number of pads, the amount of pad welding and the number of stud bolts can be reduced, and liner manufacturability can be improved. It is possible to improve.

A second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the liner plate outer pad 13 which is conventionally provided as shown in FIG. 8 is not provided, and instead the stud bolt 14 whose length is not more than the concrete cover thickness is used.
Is provided between the liner plate 7 and the reinforcing bar 10, and a grid (mesh) streak 16 is provided within the concrete cover thickness in consideration of adhesion with the concrete skeleton to provide a fixing function.

According to the second embodiment, the outer pad 13 of the liner plate 7 which is conventionally provided is eliminated and the length of the stud bolt 14 is shortened. By providing the lattice reinforcement 16 around the stud bolt 14, it is possible to prevent a decrease in the adhesive force with the concrete and a decrease in the load transmission performance, and thus a structural performance equivalent to that of the conventional example can be obtained.

Therefore, the length of the stud bolt can be reduced by providing the lattice reinforcement 16 and increasing the adhesive force with the concrete skeleton, and the pad welding amount can be reduced by reducing the pad outside the liner plate.

A third embodiment of the present invention will be described with reference to FIG. This third embodiment corresponds to FIG. 9 for a support structure to which a structure such as a pipe having a light load is attached. That is, as shown in FIG. 3, a liner plate having a liner thick plate portion 15 is used.
A liner plate inner pad 12 is provided on the liner plate 15, and the liner inner pad 12 alone serves as a support structure for attaching structures such as piping.

According to the third embodiment, since the liner plate is the thick plate liner portion 15 as compared with the general liner portion, the liner plate outer pad 13 is not provided only for pipes with a light load. However, it is possible to give a load such as piping. Further, it is possible to support a pipe having a slight load, and it is possible to reduce the number of outer pads 13 and stud bolts 14 of the liner plate 7 and the amount of pad welding involved therewith.

A fourth embodiment of the present invention will be described with reference to FIG. In this fourth embodiment, a pad 12 is provided on the inside of the liner plate 7, a cut tee 8 is provided on the outside of the liner plate 7 after adjusting the arrangement, and a stud bolt 14 is provided on the cut tee 8. Has become.

The fourth embodiment is a modified version of the first embodiment, in which a stud bolt 14 is added to the first embodiment. According to this embodiment, the fixing function can be further enhanced by the cut tee 8 and the stud bolt 14. Also, by replacing the outer pad 13 with a cut tee, the amount of pad and pad welding can be reduced,
Further, the liner manufacturability is improved as in the first to third embodiments.

[0025]

According to the present invention, the number of pads, the amount of pad welding, and the stud bolts in the related art can be considerably reduced, the structure can be simplified, and the liner manufacturability can be improved accordingly.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a first embodiment of a support structure for an internal structure of a nuclear reactor containment vessel according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a main part of a second embodiment of the support structure for the reactor containment internal structure according to the present invention.

FIG. 3 is a vertical cross-sectional view showing a main part of a third embodiment of the support structure for the reactor containment internal structure according to the present invention.

FIG. 4 is a vertical cross-sectional view showing a main part of a fourth embodiment of the support structure for the reactor containment internal structure according to the present invention.

FIG. 5 is a vertical cross-sectional view schematically showing a containment vessel for explaining a conventional example.

FIG. 6 is an enlarged vertical sectional view showing a portion A of the reactor containment vessel in FIG.

FIG. 7 is a cross-sectional view showing an enlarged part A of the reactor containment vessel in FIG.

8 is an enlarged vertical cross-sectional view showing a portion B in FIG.

9 is an enlarged vertical sectional view showing another example of a B portion in FIG.

FIG. 10 is an enlarged vertical cross-sectional view showing still another example of section B in FIG.

[Explanation of symbols]

1 ... Reactor containment vessel, 2 ... Reactor pressure vessel, 3 ... Diaphragm floor, 4 ... Dry well, 5 ... Suppression chamber, 6 ... Pedestal, 7 ... Liner plate, 8 ...
Cut tee, 9 ... Flat bar, 10 ... Reinforcing bar, 11 ... Concrete, 12 ... Liner plate inner pad, 13 ... Liner plate outer pad, 14 ... Stud bolt, 15 ... Thick plate liner part, 16 ... Lattice bar, 17 ... Structure object.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-5138 (JP, A) Actual flat 6-14998 (JP, U) Actual flat 5-13995 (JP, U) Actual flat 2- 69797 (JP, U) Actually open 60-146895 (JP, U) Actually open 59-188892 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G21C 13/02 GDB

Claims (3)

(57) [Claims] 1. A liner plate is provided on a side wall portion, and a cut tee and a flat bar are provided outside the liner plate .
A reactor containment vessel is constructed by arranging reinforcing bars and pouring concrete into the reactor containment vessel, and a pad is provided inside the liner plate, and a structure is attached to the pad. in the support structure of the reinforced concrete containment vessel internal structure of the power plant, the
Studs on the outside of the liner plate where the pad is located
Install a bolt and place a lattice reinforcement around this stud bolt.
Place the length of the stud bolt in the concrete
A support structure for an internal structure of a nuclear reactor containment vessel characterized by having a cover thickness within a certain range. 2. A liner plate is provided on a side wall portion of the liner plate.
Cutty and flat bar on the outside of the inner plate
It has a liner anchor composed of
The cleats are placed to construct the reactor containment vessel, and
A pad is provided on the inside of the inner plate and the structure is applied to this pad.
Reinforcing bar concrete in a boiling water nuclear power plant
In the support structure for the internal structure of the reactor containment vessel made by
The thick plate portion on the portion of the liner plate where the pad is located
The support structure of the reactor containment vessel internal structure, characterized in that the provided. 3. A liner plate is provided on a side wall portion of the liner plate.
Cutty and flat bar on the outside of the inner plate
It has a liner anchor composed of
The cleats are placed to construct the reactor containment vessel, and
A pad is provided on the inside of the inner plate and the structure is applied to this pad.
Reinforcing bar concrete in a boiling water nuclear power plant
In the support structure for the internal structure of the reactor containment vessel made by
The liner play in which a pad is located on the liner anchor.
Mounted inside the stack and attached to the liner anchor.
A support structure for the internal structure of a nuclear reactor containment vessel, characterized in that a dobolt is provided .