JPH06160576A - Concrete reactor containment vessel and method for constructing the concrete reactor containment vessel - Google Patents

Abstract

(57) [Summary] [Structure] The cylindrical body 14 is placed on the upper surface of the reactor shield wall 11, and the space surrounded by the inner portion of the side wall liner 13 and the outer portion of the reactor shield wall 11 is closed from above. As described above, a substantially annular top slab liner 12 is disposed, the inner edge of the top slab liner 12 is welded to the lower end of the cylindrical body 14, and the outer edge of the top slab liner 12 is welded to the upper end of the side wall liner 13. Stuck by. [Effect] The top slab liner 12 is the side wall 1 of the storage container.
Since it is supported by both the reactor and the reactor shield wall 11, the top slab liner 12 is deformed even when the top slab liner 12 is not supported by the temporary reinforcing member when the concrete is placed on the upper surface side of the top slab liner 12. Never.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete reactor containment vessel and a method for constructing the concrete reactor containment vessel.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show an example of a concrete reactor containment vessel, 1 is a side wall of a containment vessel integrally formed with a reactor building, and 2 is a side wall 1 of a containment vessel. A substantially cylindrical pedestal 3 provided in a substantially central portion of the space to be extended, a diaphragm floor 3 extending substantially horizontally from the inner side of the side wall 1 of the storage container toward the upper end of the pedestal 2 and 4 a side wall 1 of the storage container. Side wall 1 of the containment vessel from the top
The top slab 5 having a substantially annular planar shape extending substantially horizontally toward the center of the space surrounded by is a cylindrical steel cylinder provided in the opening of the top slab 4 so as to be located substantially directly above the pedestal 2. , 6 is a steel containment vessel lid attached to the upper end of the cylindrical body 5, and 7 is an inner side of the containment vessel side wall 1, an outer side of the pedestal 2 and a diaphragm floor 3.
A suppression chamber formed by the lower surface of the storage container and the base 9 of the storage container, and 8 is an upper dry well formed by the inner portion of the side wall 1 of the storage container, the upper surface of the diaphragm floor 3 and the lower surface of the top slab 4.

Reference numeral 12 denotes a substantially annular steel top slab liner provided on the lower surface of the top slab 4 forming the upper dry well 8, and 13 is provided on the inner surface of the side wall portion 1 of the storage container forming the upper dry well 8. A side wall liner made of substantially cylindrical steel, the lower end of the cylindrical body 5 and the inner edge of the top slab liner 12, and the outer edge of the top slab liner 12 and the upper end of the side wall liner 13 are fixed to each other by welding. Has been done.

Reference numeral 10 is a reactor pressure vessel supported by the pedestal 2, and 11 is a reactor shield wall provided at the upper end of the pedestal 2 so as to surround the reactor pressure vessel 10 in the circumferential direction.

Conventionally, when constructing a concrete nuclear reactor containment vessel having the above-mentioned structure, from the containment vessel base portion 9 to the lower portion of the containment vessel side wall portion 1, the pedestal 2, the diaphragm floor 3, and the reactor shield wall 11. Sequentially, concrete pouring work is carried out upwards.

Further, when constructing the portion forming the upper dry well 8 of the side wall portion 1 of the storage container, the side wall liner 13 is installed prior to providing the concrete formwork, and the side wall liner 13 is set to the concrete when placing the concrete. It is used as part of the formwork.

Further, when constructing the top slab 4,
The top slab liner 12 is installed prior to providing the concrete formwork, and the top slab liner 12 is used as a part of the concrete formwork during concrete pouring.

[0008]

However, when pouring concrete onto the portion to be the top slab 4, the weight of the concrete in the fluidized state is kept until the concrete to be poured is completely solidified. In order to prevent the top slab liner 12 from being deformed by acting on the top slab liner 12, prior to concrete placing work,
A large number of temporary reinforcing members such as temporary pillars are provided between the upper surface of the already constructed diaphragm floor 3 and the lower surface of the top slab liner 12, and the load of the concrete in a fluidized state is passed through the top slab liner 12 and the temporary reinforcing member. It must be supported by the diaphragm floor 3.

Therefore, the above-mentioned temporary reinforcing member cannot be removed until the concrete forming the top slab 4 is completely solidified. Therefore, during this time, various devices to be stored in the upper dry well 8 are not able to be removed. Cannot be installed on the diaphragm floor 3.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to enable concrete to be cast on a portion to be a top slab without providing a temporary reinforcing member.

[0011]

In order to achieve the above object, in a concrete reactor containment vessel according to claim 1 of the present invention, a concrete constructed so as to surround a reactor pressure vessel in a circumferential direction is used. A side wall of the storage container, a side wall liner made of a substantially cylindrical metal along the inner surface of the side wall of the storage container, and from the upper end of the side wall of the storage container toward the center of the space surrounded by the side wall of the storage container. A top slab having a substantially annular planar shape made of concrete extending substantially horizontally, a top slab liner made of a substantially annular metal provided on the lower surface of the top slab and fixed to the side wall liner, and the top slab and tops. A metal cylindrical body that vertically penetrates the opening of the lab liner, is fixed to the top slab liner, and has a containment vessel lid attached to the top thereof; In concrete containment vessel and a inwardly disposed a reactor shield wall of the storage container side wall so as to surround the reactor pressure vessel in the circumferential direction,
The structure is such that the lower end of the cylindrical body is supported on the upper end of the reactor shield wall.

In the method for constructing a concrete reactor containment vessel according to a second aspect of the present invention, a concrete containment side wall portion is constructed so as to surround the reactor pressure vessel in the circumferential direction, and After the reactor shielding wall is provided inward of the side wall of the containment vessel so as to surround the reactor pressure vessel in the circumferential direction, a metallic cylindrical body is provided on the upper end of the reactor shielding wall as the reactor pressure vessel. In order to close the space formed between the inner side of the side wall liner made of metal provided inside the side wall of the containment vessel and the outer side of the reactor shield wall from above from the upper side. A substantially annular metal top slab liner is disposed in, the inner edge of the top slab liner is fixed to the cylindrical body, and the outer edge of the top slab liner is fixed to the upper end of the side wall liner, respectively.
Concrete is cast on the upper surface side of the top slab liner to form a top slab.

[0013]

In both the concrete reactor containment vessel according to claim 1 of the present invention and the concrete reactor containment vessel according to claim 2 of the present invention, the top slab liner is used as a side wall portion of the containment vessel. Since it is supported on both the reactor shield wall, the top slab liner is not deformed even when concrete is placed on the upper surface side of the top slab liner when constructing the concrete containment vessel.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of a concrete reactor containment vessel according to the present invention. In the figures, the same reference numerals as those in FIGS. 3 and 4 represent the same parts.

Reference numeral 14 denotes a steel cylindrical cylinder provided on the top slab 4 so as to be positioned almost directly above the pedestal 2.
The lower end of the cylindrical body 14 is in contact with the upper end of the reactor shielding wall 11, the outer edge of the top slab liner 12 is fixed to the upper end of the side wall liner 13, and the inner edge is fixed to the lower end of the cylindrical body 14. There is.

A plurality of shear plates 15 are fixed to the lower surface of the cylindrical body 14 at substantially equal intervals in the circumferential direction,
Each of the shear plates 15 is fitted into recessed portions 16 provided on the upper surface of the reactor shield wall 11 at substantially equal intervals in the circumferential direction.

When constructing the concrete reactor containment vessel having the above-mentioned structure, as in the case of the concrete reactor containment vessel shown in FIGS. 3 and 4, from the containment vessel base 9 to the lower part of the containment vessel side wall portion 1. , The pedestal 2, the diaphragm floor 3 and the reactor shielding wall 11 are sequentially poured upward in order to perform concrete pouring work.

After constructing the portion forming the upper dry well 8 of the side wall 1 of the containment vessel, the cylindrical barrel 14 is placed on the upper surface of the reactor shielding wall 11, and the upper surface of the diaphragm floor 3 and the inside of the side wall liner 13 are placed. A substantially annular top slab liner 12 is arranged so as to close a space surrounded by the above portion and the outer portion of the reactor shielding wall 11 from above.

Further, the inner edge portion of the top slab liner 12 is fixed to the lower end portion of the cylindrical body 14, and the outer edge portion of the top slab liner 12 is fixed to the upper end portion of the side wall liner 13 by welding, respectively. After being supported by the reactor shield wall 11 via the cylindrical body 14 and the outer side portion of the top slab liner 12 by the side wall liner 13 of the containment vessel side wall portion 1, the top slab liner 12 is supported.
The top slab 4 is formed by placing concrete on the upper surface side of the.

At this time, since the top slab liner 12 is supported by both the reactor shield wall 11 and the side wall liner 13, even if concrete is placed on the upper surface of the top slab liner 12, the load of the concrete in the fluidized state Therefore, the top slab liner 12 is not deformed.

As described above, in this embodiment, concrete is placed on the upper surface side of the top slab liner 12 without providing many temporary reinforcing members between the upper surface of the diaphragm floor 3 and the lower surface of the top slab liner 12. Therefore, various equipment to be stored in the upper dry well 8 can be installed on the diaphragm floor 3 even during the operation of pouring concrete for forming the top slab 4 or during the curing period after pouring the concrete. Therefore, it is possible to shorten the construction period of the nuclear power plant construction.

The concrete nuclear reactor containment vessel of the present invention and the method for constructing the concrete nuclear reactor containment vessel are not limited to the above-described embodiments, but may be within the scope of the present invention. Of course, various changes can be made.

[0024]

As described above, according to the concrete reactor containment vessel and the method for constructing the concrete reactor containment vessel of the present invention, various excellent effects as described below can be obtained.

(1) In any of the concrete reactor containment vessel according to claim 1 of the present invention and the concrete reactor containment vessel according to claim 2 of the present invention, the top slab liner is used as the containment vessel. Since it is supported on both the side wall and the reactor shield wall, even when concrete is placed on the top side of the top slab liner when the concrete slab is not supported by the temporary reinforcement members when constructing the concrete containment vessel, There is no deformation.

(2) In both the concrete reactor containment vessel according to claim 1 of the present invention and the concrete reactor containment vessel according to claim 2 of the present invention, a large number of top slab liners are used. Since it is possible to cast concrete on the upper surface side of the top slab liner without being supported by the temporary reinforcing member, during the concrete pouring work for forming the top slab, or even during the curing period after concrete pouring, Various devices can be installed in the space below the top slab liner, and thus the construction period of the nuclear power plant construction can be shortened.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of a concrete reactor containment vessel of the present invention.

FIG. 2 is a vertical sectional view showing details of a top slab of the concrete reactor containment vessel of the present invention.

FIG. 3 is a conceptual diagram showing an example of a conventional concrete reactor containment vessel.

FIG. 4 is a vertical cross-sectional view showing details of a top slab of a conventional concrete reactor containment vessel.

[Explanation of symbols]

 1 PCV Side Wall 4 Top Slab 6 PCV Lid 10 Reactor Pressure Vessel 11 Reactor Shield Wall 12 Top Slab Liner 13 Sidewall Liner 14 Cylindrical Body

Claims (2)

[Claims] 1. A side wall portion of a containment vessel made of concrete constructed so as to surround the reactor pressure vessel in a circumferential direction,
The side wall liner made of a substantially cylindrical metal along the inner surface of the side wall of the storage container, and concrete extending substantially horizontally from the upper end of the side wall of the storage container toward the center of the space surrounded by the side wall of the storage container. A substantially annular top slab having a substantially planar shape, a substantially annular metal top slab liner provided on the lower surface of the top slab and fixed to the sidewall liner, and the top slab and the opening of the top slab liner are vertically arranged. A metal cylindrical cylinder that penetrates through and is fixed to the top slab liner and has a containment vessel lid attached to the top, and is arranged inside the containment vessel side wall so as to surround the reactor pressure vessel in the circumferential direction. In a concrete reactor containment vessel having a reactor shield wall, the lower end of the cylindrical body is supported on the upper end of the reactor shield wall. Doo-made reactor containment vessel. 2. A containment side wall portion made of concrete is constructed so as to surround the reactor pressure vessel in the circumferential direction, and a reactor shielding wall is provided around the containment vessel side wall so as to surround the reactor pressure vessel in the circumferential direction. A metal cylinder provided on the inner side of the side wall of the containment vessel, with a metal cylindrical cylinder placed on the upper end of the reactor shielding wall substantially concentrically with respect to the reactor pressure vessel. A substantially annular metal top slab liner is arranged so as to close the space formed between the inner part of the side wall liner made of aluminum and the outer part of the reactor shield wall from above,
The inner edge of the top slab liner to the cylindrical body,
A method for constructing a concrete reactor containment vessel, characterized in that an outer edge portion of a top slab liner is fixed to an upper end portion of the side wall liner, respectively, and concrete is placed on an upper surface side of the top slab liner to form a top slab.