JP3146119B2 - 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 wall structure in which the structure of a liner anchor is improved with good workability.

[0002]

2. Description of the Related Art In the event of an accidental damage to the primary reactor system,
A reactor containment vessel is installed inside the reactor building as the primary containment facility for the reactor pressure vessel so that radioactive materials leaked from the reactor core are contained in the system and radioactivity is not released to the outside. The reactor containment vessel of the boiling water reactor is all pressure suppression type, and consists of a drywell and a pressure suppression chamber.

[0003] In addition to the equipment belonging to the reactor pressure boundary, such as the reactor pressure vessel, recirculation system piping, steam piping, and valves, the drywell contains the reactor pressure vessel base (pedestal) and containment vessels such as heat shields. The internal structure and air-conditioning equipment are housed.
It is determined that the space required for installation, maintenance, etc. will be secured.

As shown in FIG. 4, a reinforced concrete containment vessel 1 (hereinafter referred to as RCCV) in a boiling water reactor
A steel reactor pressure vessel base 2 and a reactor pressure vessel 3 are installed above a pedestal 2 serving as a steel reactor pressure vessel base in the center of the inside. A diaphragm floor 6 made of a reinforced concrete slab which partitions the space above and below into a dry well 4 and a suppression pool 5 is constructed.

In FIG. 4, reference numeral 7 denotes a top slab, 8 denotes a reactor pressure vessel head, 9 denotes a top head, 10 denotes a well, 11 denotes a well plug, and 12 denotes an RCCV wall. FIG. 5 shows a conventional R cut along the line AA in FIG.
FIG. 6 is an enlarged cross-sectional view showing a part of the CCV wall 12, and FIG.
FIG. 6 is a partial longitudinal sectional view taken along the line BB of FIG. 5.

As shown in FIGS. 5 and 6, the RCCV wall
Numeral 12 is to cast the concrete 15 after assembling the inner reinforcing bar 13 and the outer reinforcing bar 14 so as to maintain the structural strength against various loads applied to the RCCV. Also, R
A liner plate 16 is provided inside the CCV wall 12 for RCCV
The airtightness is ensured. Further, a liner anchor 17 is provided on the side of the liner plate 16 facing the concrete 15, so that the liner plate 16 and the concrete 15 are integrated.

As shown in FIG. 7 and FIG.
At the time of placing 15, a liner anchor is provided on the back surface of the inner steel liner plate 16 at the construction site of the RCCV 1, a flat bar 18 is provided on this liner anchor as a temporary material, and a form support 19 is attached to the flat bar 18. A wooden form is assembled on the form supporting hardware 19, and concrete 15 is poured into the wooden form 20.

[0008] After hardening of the concrete, the wooden formwork
It is common practice to remove 20.
In addition, in the top slab 7, the reinforcing bars were arranged in a lattice pattern, and matched with the lattice arrangement of the liner anchor 17 and the flat bar.

[0009]

However, the RCC
In assembling the above-described wooden formwork 20 for constructing the V wall 12, it is necessary to install a formwork support 19 for managing the cross-sectional thickness of the skeleton. This form support metal 19 is used to tighten and attach a flat bar 18 installed on a liner plate 16 and an outer wooden form 20 by a large amount of reinforcing bars 13, 13.
It is necessary to set a position avoiding a and 14.

However, in the conventional RCCV wall 12, 320 rebars are arranged per circumferential length of about 29 m in inner diameter, and the innermost rebar 13 is spaced at about 285 mm. On the other hand, the liner anchors 17 are about 500 mm apart, and the mutual positional relationship between the reinforcing bars 13, the reinforcing bars 13 a and the liner anchors 17 is slightly shifted.

For this reason, an extremely large amount of labor is required for adjustment work for determining the mounting position of the flat bar 18 for setting the form support metal 19, the hole position of the flat bar 18, and the like. . The liner plate 16 is further provided with an embedded metal fitting for mounting a support structure such as a pipe and its stud bolt, and the liner anchor 17, the reinforcing bar 13, and the reinforcing bar 13 a are provided.
However, there is a problem that the adjustment work for installing the apparatus at a position avoiding the above becomes very complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a wall structure of a containment vessel which facilitates installation of a mold support and an embedded metal and does not require complicated adjustment work. The purpose is to do.

[0013]

According to the first aspect of the present invention, there is provided a reactor containment vessel containing a reactor pressure vessel.
And place the liner plate in front of the liner plate.
Rebars are placed at equal intervals on the opposite side of the reactor pressure vessel
The liner plate on the side of the liner plate
Attach a mosquito on the opposite side of the rebar from the reactor pressure vessel.
Assemble the formwork, between the liner plate and the formwork
Pour concrete and before hardening the concrete
Removing the formwork to form the containment wall,
And adjusting the spacing between the liner anchors to the spacing between the reinforcing bars.
Characterized as one of several times, 1.5 times or 2.5 times
And

The invention according to claim 2 is the invention according to claim 1.
In the invention, the form support directly provided on the liner anchor is provided.
It is characterized in that the mold is assembled to a metal holding object.

[0015]

According to the first aspect of the present invention, the mounting interval of the liner anchors can be any of integer multiples, 1.5 times, and 2.5 times the rebar interval.
And whether to set the Rainaanka between rebar and rebar. This allows all liner anchors and rebars to be standard
To be of, the determination of the mounting position of the mold mounting hardware based on review and confirmation and the result of each Rainaanka and rebar position has been conventionally performed becomes unnecessary, and further position determination standardization of embedded hardware, As a result, the work can be made more efficient and easier.

According to a second aspect of the present invention, in a nuclear reactor containment vessel in which the mutual positional relationship between the liner anchor and the rebar is unified, the mold mounting hardware is directly attached to the liner plate or the liner anchor instead of the conventional flat bar. The arrangement adjustment work of the frame mounting hardware is reduced.

[0017]

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the wall structure of a containment vessel according to the present invention will be described with reference to FIG. FIG. 1 shows only a main part of the wall structure according to the first embodiment, and corresponds to FIG. 7 of the conventional example. Therefore, the same parts as those of the conventional example shown in FIG.

That is, in the present embodiment, a liner anchor 17 is attached to a liner plate 16 on the inner surface.
Formwork mounting hardware 19 is provided on the inside, the inner reinforcing bar 13, the reinforcing bar 13a, and the outer reinforcing bar are arranged, and concrete is cast into the RCCV.
Make up the wall.

Then, as shown in FIG.
The mounting interval of 17 is set to twice (about 570 mm) the interval between the reinforcing bars 13 and 13a, and the mounting position of the liner anchor 17 is installed at the center between the reinforcing bar 13 and the reinforcing bar 13a. As a result, the liner anchor 17 and the reinforcing bar 13
And the reinforcing bars 13a have the same mutual positional relationship.

Although the conventional liner anchor 17 was designed to be mounted at intervals of 500 mm, as a result of various experiments and design studies, the mounting interval was set to approximately 570 mm as in this embodiment.
It was recognized that it could be established even if it was expanded to the extent. As a result, the liner anchor 17 is
They are arranged at twice the mounting interval of 13a, their relative positions are unified, and the formwork mounting bracket can be standardized and mounted.

According to this embodiment, the formwork mounting position can be adjusted in advance for each liner anchor 17 without confirming the positions of the reinforcing bars 13 and the reinforcing bars 13a. Since the arrangement of the mounting hardware such as the support structure can be easily adjusted, the operation can be greatly simplified.

In this embodiment, the spacing between the liner anchors 17 is twice the spacing between the reinforcing bars 13 and the reinforcing bars 13a, and the liner anchors are multiples of the spacing between the reinforcing bars, so that the mutual positional relationship is the same. In this embodiment, the mounting interval of the liner anchor 17 is not limited to twice the reinforcing bar interval, and is not more than 1.5 times the reinforcing bar interval.
The liner anchor installation interval that can solve the problems of the prior art such as double, 2.5, and 3 times includes the case where the rebar interval is multiplied by a constant.

Further, it is not limited that 320 reinforcing bars are arranged per circumferential length in the prior art as the reinforcing bar spacing. Further, the mounting position of the liner anchor 17 is not limited to the center of the reinforcing bar 13 and the reinforcing bar 13a, but may be a relative position such as the same position as the reinforcing bar or a position shifted by 1/4 of the interval between the reinforcing bar and the reinforcing bar. This includes making them identical.

Next, a second embodiment of the reactor containment wall structure according to the present invention will be described with reference to FIG. FIG. 2 corresponds to FIG. 8 of the conventional example. Therefore, the same portions as those of the conventional example shown in FIG. 8 are denoted by the same reference numerals, and the description of the overlapping portions will be omitted.

The second embodiment differs from the prior art in that the position of the rebar and the liner anchor do not overlap in the reactor containment vessel in which the relative positions of the rebar and the liner anchor are unified. The illustrated flat bar 8 is removed, and instead the formwork mounting hardware 19 is directly connected to the liner anchor 17 to provide a temporary material for mounting the formwork mounting hardware.

According to the second embodiment, the flat bar 18
Since there is no need to additionally install the frame, the formwork mounting hardware 20 can be directly attached to the liner plate 16 or the liner anchor 17, and the flat bar 18 can be further removed from the first embodiment.
Can be deleted.

Next, a third embodiment of the wall structure of the containment vessel according to the present invention will be described with reference to FIG. This embodiment is based on the first and second embodiments described above. The liner anchor 17 of the top slab 7 of the RCCV1 shown in FIG. That is, they are arranged circumferentially in FIG.

That is, in this embodiment, in FIG. 3A, the liner anchors 17 are arranged radially and the flat bars 18 are arranged on the circumference. FIG. 3B shows another example of FIG. 3A, in which a liner anchor 17a is arranged on the circumference and a flat bar is formed.
18 (not shown) in radial arrangement.

According to the third embodiment, as in the first and second embodiments, the reinforcing bar and the liner anchor do not overlap each other even in the top slab 7 portion. Even when the frame support metal is installed on the liner anchor or the liner plate of the top slab, it is easily possible, and the arrangement adjustment of the embedded metal for mounting the support structure can be simplified.

FIG. 3C shows a fourth embodiment of the present invention. As an example of the arrangement of liner anchors according to the third embodiment, a liner anchor 17 as shown in FIG. It is divided and arranged radially, and the flat bar 18 is arranged circumferentially. According to the fourth embodiment, as in the third embodiment, there is an effect that the work of adjusting the arrangement of the embedded hardware and the like can be facilitated.

[0032]

According to the present invention, the work for examining and confirming the positions of the respective liner anchors and reinforcing bars, determining the mounting position of the formwork mounting hardware based on the results, and determining the arrangement position of the embedding hardware is performed. Because the work is standardized, the work can be made more efficient and easier.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing a main part of a first embodiment of a wall structure of a containment vessel according to the present invention.

FIG. 2 is a perspective view showing a main part of a second embodiment of the wall structure of the containment vessel according to the present invention.

FIG. 3A is a cross-sectional view schematically showing a main part of a third embodiment of the wall structure of the containment vessel according to the present invention, and FIG.
FIG. 9A is a cross-sectional view showing another example, and FIG. 9C is a cross-sectional view showing a fourth embodiment of the present invention.

FIG. 4 is a longitudinal sectional view schematically showing a reactor containment vessel.

5 is a cross-sectional view cut along the direction of arrows AA in FIG. 4 and enlarged.

FIG. 6 is a longitudinal sectional view cut along the direction of arrow BB in FIG. 5;

FIG. 7 is a cross-sectional view schematically showing a main part of the wall structure of the containment vessel in FIG.

FIG. 8 is a perspective view showing a state in which main parts in FIG. 7 are engaged with each other.

[Explanation of symbols]

1. Reactor containment vessel, 2. Pedestal, 3. Reactor pressure vessel, 4. Dry well, 5. Suppression pool,
6 ... diaphragm floor, 7 ... top slab, 8 ... reactor pressure vessel, 9 ... top head, 10 ... well, 11 ... well plug, 12 ... RCCV wall, 13 ... inner rebar, 13a ... reinforcing bar, 14 ... outer bar , 15 ... concrete, 16 ... liner plate, 17 ... liner anchor, 18 ... flat bar, 19 ... formwork support hardware, 20 ... wooden formwork, 21 ... top slab anchor.

Claims (2)

(57) [Claims] 1. A containment vessel for storing a reactor pressure vessel
In the vessel, set the liner plate and
Bars are placed at equal intervals on the opposite side of the reactor from the reactor pressure vessel.
On the side of the liner plate where the rebar is located.
Attach an anchor, and with the reactor pressure vessel of the rebar
Assemble the formwork on the other side, and attach the liner plate and the mold
Pour concrete between the frames and allow the concrete to harden.
After the conversion, the formwork was removed to form the wall of the PCV
And the liner anchor installation interval is
Integer multiple of the interval, 1.5 times, 2.5 times
And a containment vessel. 2. A form support directly provided on said liner anchor.
2. The mold according to claim 1, wherein the mold is assembled to a metal object.
A containment vessel as described.